Table of Contents

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-K
(Mark One)
xANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended March 31, 20192021
OR
¨TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period fromto
Commission file number 000-26251
NETSCOUT SYSTEMS, INC.
(Exact name of registrant as specified in its charter)
Delaware04-2837575
(State or other jurisdiction of

incorporation or organization)
(IRS Employer

Identification No.)
310 Littleton Road, Westford, MA 01886
(978) 614-4000
 

Securities registered pursuant to Section 12(b) of the Act:
Title of each classTrading Symbol(s)Name of each exchange on which registered:
Common Stock, $0.001 Parpar value per shareNTCTNasdaq Global Select Market

Securities registered pursuant to Section 12(g) of the Act: None
Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. YES  Yes  x NO No ¨
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. YES Yes ¨ NO No x
Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    YES  Yes  x    NO      No  ¨
Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    YES  Yes  x    NO      No  ¨
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act. (Check one):
Large accelerated filer  x            Accelerated filer             ¨
Non-accelerated filer   ¨             Smaller reporting company    ¨
Emerging growth company    ¨
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨
Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.☒
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). YES  ¨    NO  x
The aggregate market value of common stock held by non-affiliates of the registrant as of September 30, 20182020 (based on the last reported sale price on the Nasdaq Global Select Market as of such date) was approximately $1,886,903,665. $1,546,085,584. As of May 13, 2019,10, 2021, there were 77,462,62973,752,519 shares of the registrant's common stock outstanding.
DOCUMENTS INCORPORATED BY REFERENCE
Portions of the Registrant’sregistrant's definitive Proxy Statement for the fiscal year 20192021 Annual Meeting of Stockholders which willto be made availablefiled with the U.S. Securities and Exchange Commission pursuant to Regulation 14A not later than 120 days after the end of the fiscal year covered by this Annual Report on the Company's website at ir.netscout.com and at the SEC's website at www.sec.gov,Form 10-K are incorporated by reference intoin Part III, Items 10-14 of this Annual Report on Form 10-K. Except as expressly incorporated by reference, the proxy statement is not deemed to be part of this report.






NETSCOUT SYSTEMS, INC.
FORM 10-K
FOR THE FISCAL YEAR ENDED MARCH 31, 20192021
TABLE OF CONTENTS
 
PART I
PART I
Item 1.
Item 1A.
Item 1B.
Item 2.
Item 3.
Item 4.
PART II
Item 5.
Item 6.
Item 7.
Item 7A.
Item 8.
Item 9.
Item 9A.
Item 9B.
PART III
Item 10.
Item 11.
Item 12.
Item 13.
Item 14.
PART IV
Item 15.
Item 16.


Unless the context suggests otherwise, references in this Annual Report on Form 10-K (Annual Report) to "NetScout," the "Company," "we," "us," and "our" refer to NetScout Systems, Inc. and, where appropriate, our consolidated subsidiaries.


NetScout, the NetScout logo, Adaptive Service Intelligence and other trademarks or service marks of NetScout appearing in this Annual Report are the property of NetScout Systems, Inc. and/or its subsidiaries and/or affiliates in the United States and/or other countries. Any third-party trade names, trademarks and service marks appearing in this Annual Report are the property of their respective holders.








Cautionary Statement Concerning Forward-Looking Statements
This Annual Report contains forward-looking statements under Section 21E of the Exchange Act (as defined below) and other federal securities laws. These statements relate to future events or our future financial performance and are identified by terminology such as "may," "will," "could," "should," "expects," "plans," "intends," "seeks," "anticipates," "believes," "estimates," "potential" or "continue," or the negative of such terms or other comparable terminology. These statements are only predictions. You should not place undue reliance on these forward-looking statements. Actual events or results may differ materially. Factors that may cause such differences include, but are not limited to, the factors discussed under the heading "Risk Factors" and in our other filings with the Securities and Exchange Commission (SEC). These factors may cause our actual results to differ materially from any forward-looking statement. Moreover, we operate in a very competitive and rapidly changing environment. New risks emerge from time to time. It is not possible for our management to predict all risks, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements we may make.
Except as required by law, we do not undertake any obligation to release publicly any revisions to these forward-looking statements after completion of the filing of this Annual Report to reflect later events or circumstances or the occurrence of unanticipated events.


PART I
    
Item 1. Business
Overview
We are an industry leader with over 35 years of experience in providing service assurance and securitycybersecurity solutions that are used by customers worldwide to assure and secure their digital business services against disruption.disruption while preserving the user experience. Service providers and enterprises, including local, state and federal government agencies, rely on our solutions to achieve the visibility and security necessary to optimize network performance, ensure the delivery of high-quality, mission-critical applications and services, gain timely insight into the end user experience, and protect the network from attack. With our offerings, customers can quickly, efficiently and effectively identify and resolve issues that result in downtime, interruptions to services, poor service quality or compromised security, thereby driving compelling returns on their investments in their network and broader technology initiatives. Some of the more significant technology trends and catalysts for our business include the evolution of customers' digital transformation initiatives such as cloud migration, expanding threats associated with the rapidly evolving cybersecurity threat landscape, the advancement of business intelligence and analytics, and the 5G evolution occurring in both the service provider and enterprise verticals.
Our operating results are influenced by a number of factors, including, but not limited to, the mix and quantity of products and services sold, pricing, costs of materials used in our products, growth in employee-related costs, including commissions, and the expansion of our operations. Factors that affect our ability to maximize our operating results include, but are not limited to, our ability to introduce new products and enhance existing products, the marketplace acceptance of those new or enhanced products, continued expansion into international markets, development of strategic partnerships, competition, successful acquisition integration efforts, and our ability to achieve expense reductionsmanage expenses and make improvements in a highly competitive industry.
Markets
Our service assurance solutions are used by enterprises (including government agencies) and service providers to optimize network performance, quickly identify and resolve issues impacting application and service quality and gain insight into the end user experience. We also provide securityOur cybersecurity solutions thatare used by enterprises and service providers use to identify and mitigate advanced, volumetric, and application specificapplication-specific distributed denial of service (DDoS) attacks, as well as assist enterprise security teams in rapidly finding and isolating other advanced network threats.
Enterprise Market
Within the enterprise market, NetScout's nGeniusONE and ISNG offerings along with certain product lines acquired as part of the acquisition of Danaher's Corporation's (Danaher) Communication Business in July 2015 (Comms Transaction), enable IT organizations to support a growing range of performance management and securitycybersecurity use cases including:
Network Performance Management - Our nGeniusONE analytics and our ISNG real-time information platform provide the necessary insight to optimize network performance, restore service and understand the quality of the users’ experience. By integrating certain acquired product lines and product features from the former Fluke Networks Enterprise business withinto our core offerings, our customers can benefit from a consistent view across their traditional wired network infrastructures, remote offices, and WiFi wireless networks.
networks (WiFi).

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Application Performance Management: Data Center Transformation and Cloud Computing - We enable information technology (IT) organizations, from their development operations to their infrastructure teams, to manage the delivery of services across virtual and physical environments, providing a comprehensive, unified real-time view into network, application, server, and user communities' performance. We proactively detect emerging issues with the ability to help analyze both physical and virtual service delivery environments within the data center which enables organizations to optimize datacenter infrastructure investments, protect against service degradations, and simplify the operation of complex, multi-tier application environments in consolidated, state-of-the-art data centers. Our solutions are often used by enterprises to support private cloud computing environments that are aimed at enabling greater, more cost-effective accessibility to applications without compromising the reliability and security of those applications and the network. Our solutions portfolio also includes a range of new virtual appliances that can help enterprise customers extend their monitoring of applications deeper into their traditional data centers, confidently migrate applications into public cloud environments and gain a comprehensive, cohesive view into the resulting hybrid cloud environment.
Unified Communications (UC) - We deliver deep application-level unified visibility into voice, data and video services side-by-side in order to understand the interrelationships of all UC services that traverse the network infrastructure and assess quality and performance of the delivery of these services. As a result, our real-time, actionable intelligence helps customers to deliver a high-quality UC experience as users make calls, video conference and engage in instant messaging. We also help desktop, network, telecom, and application teams manage UC through a common platform across complex, geographically dispersed, and multi-vendor environments.
Software-as-a-Service and Infrastructure Performance Management - We also provide enterprise customers with active agent-based offerings that can help them determine availability and performance levels for software-as-a-service (SaaS) applications, and gauge the health of servers, routers and switches as well as wireless and virtual infrastructures. As a result, customers can continuously monitor the performance of key business services and the infrastructure used to deliver them, regardless of how applications are deployed or where the user is located. Deployed independently or as part of our broader service assurance solution, these products also play an important role in helping enterprises deliver a superior user experience, achieve outstanding service quality and drive better returns on their application and infrastructure investments.
Application and Desktop Virtualization -We provide clear and actionable insights that help customers fully realize the operational benefits associated with Application and Desktop Virtualization, and reduce the time it takes to identify and resolve service problems. We offer visibility across all virtual desktop infrastructure (VDI) tiers including remote access, client, virtualization, web, front-end application, and related database systems, and help customers gain actionable metrics and insight from monitoring and analyzing the consumption and performance of VDI services.
Cybersecurity: DDoS Protection and Cyber Threat Analytics - Computer networks continue to be targeted for cyberattacks, even more aggressively during the COVID-19 pandemic, that are aimed at disrupting, damaging, or otherwise destroying an enterprise’s ability to conduct its business or gaining unauthorized access to corporate applications and stealing valuable information. We provide a range of network security solutions under the NetScout Arbor brand that enable enterprises to protect their networks from high-volume and application-specific DDoS attacks, which are aimed at either overwhelming the network with traffic or over-exercising specific functions or features of a website with the intention to disable those functions or features. We arehave also developingdeveloped new securitycybersecurity solutions for enterprises that provide greater deep-dive forensic capabilities as well as analytics that can provide visibility into anomalous behavior on the network that may be indicative of an advanced threat. These new security analytics will enable existing enterprise customers to leverage their historical investments in NetScout’s service assurance solutions by using the Adaptive Service Intelligence (ASI) data already being generated to support service assurance as well as cybersecurity use cases.
Government Markets
Considered as part of our enterprise vertical, we have built a strong position with federal, state and local government agencies, both in the United States and abroad. Similar to our enterprise customers, government agencies are focused on streamlining and transforming IT into more efficient and more easily managed environments. To accomplish this, agencies are turning to IT solutions that will help simplify managing and assuring their IT environments as well as reduce costs. However, governmental markets differ from enterprise markets primarily due to their purchasing cycles being influenced by potential changes in government administrators, budgetary priorities and allocated funding for key projects.
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Telecommunication Service Provider Markets
Today’s service providers are focused on delivering a compelling set of services and ensuring a high-quality user experience, while also striving to minimize operational complexity, control costs and improve automation. This, coupled with


the challenge of internet protocol (IP) transformation activities and complex technologies such as 5G, Long-Term Evolution (LTE), Network Functions VirtualisationVirtualization (NFV), Internet Protocol Television (IP-TV), wireless network (WiFi) and cloud services drives the need for a more automated and unified approach to managing service delivery and the subscriber experience. Our service provider solutions support an expanding range of use cases including:
Service Assurance for Mobile, Fixed Line and Cable Operators - The fundamental transformation of the mobile network to all-IP enables mobile operators to build highly-scalable service delivery environments to offer new services to meet the growing subscriber demand for data, voice and video-centric services and to consolidate and simplify network operations. Mobile operators use our offerings to gain real-time, detailed IP packet-level insight and core-to-access visibility, which enables them to ensure services offered over the network and meet certain pre-defined quality levels for an optimal subscriber experience. NetScout’s service assurance solutions help service providers effectively manage capacity, assess overall network quality, take proactive steps to modify the network before issues impact subscribers, and quickly identify and troubleshoot network problems. In addition to improving the overall return on their network infrastructure investments, mobile operators using our solutions also benefit from improved network quality and unique customer insights - both of which contribute to subscriber acquisition, retention, and monetization. The growing demand for high-bandwidth triple-play services, broadband connectivity, content anywhere, IP-TV, on-demand video traffic, new extended WiFi initiatives and carrier Ethernet services presents fixed line and cable multi-system operators with significant revenue opportunities. IP has become the de facto convergence mechanism for access, distribution and core networks, enabling new service offerings and simplifying network operations while reducing total cost of operations. For example, cable operators use our solutions to monitor and manage their local area WiFi connectivity services, ensure the high-quality delivery of video to consumers outside of their homes as well as provide broadband and telephony services targeting small- and medium-sized businesses.
Business Intelligence for Service Providers - Service providers strive to understand how the performance of their networks impact customer experience, subscriber behavior and related usage trends. By combining network traffic data with other information, including support requests, subscriber calling plans, demographic data and other details, service providers can make more timely decisions about their offerings and sales and marketing initiatives to acquire, retain and further monetize their subscribers. NetScout’s analytics deliver timely insights into a service provider’s subscribers, services, networks, and applications, as well as easy export capabilities so that this information can be integrated into their data lakes and third-party analytic platforms.
DDoS Protection - Over the past decade, Internet Service Providers (ISPs), including leading telecommunications providers, cable multi servicemulti-service operators and cloud providers, have seen significant increases in the sophistication, scale and frequency of high-volume and application-specific DDoS attacks on their networks. DDoS attacks are aimed at disrupting the online services of an ISP’s business customer by overwhelming the network with traffic or by over-exercising specific functions or features of a website with the intention to disable those functions or features. NetScout Arbor smart DDoS solutions are used by a wide range of ISPs around the world to help protect their networks against DDoS attacks, and to resell certain DDoS offerings to their enterprise customers.
Products Overview
Since our founding in 1984, we have been an industry innovator in using internet protocol-based (IP-based)IP-based network traffic to help organizations manage and optimize the delivery of services and applications over their networks, improve the end-user experience and protect networks from unwanted securitycybersecurity threats. Using our patented ASI technology, our solutions instantaneously convert network traffic data, often referred to as wire data, into high-value metadata, or "smart data," ourdata". Our offerings can help customers quickly identify and troubleshoot network and application performance issues, defend their networks from DDoS and other cybersecurity attacks, and rapidly find and isolate advanced network threats. Our solutions are typically deployed by customers as integrated hardware and software, as software only that is then integrated into commercial off-the-shelf hardware, or in a virtualized environment as software only, or as a Software as a Service (SaaS) form factor. NetScout'sOur solutions help itsour customers meet the increasing demands and ever-changing technology landscape of IP networks, service, applications, and applications.cybersecurity. In recent years, to further elevate our value proposition and address the nearnear- and long termlong-term needs of customers and prospects, we have delivered major product upgrades across our product lines by integrating key functionality from acquired product lines, increasing the deployment flexibility of our solutions, and adding new features and capabilities that enable us to address a broader range of use cases. Our primary products can be categorized as follows:


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Service Assurance Solutions for Network and Application Performance and Business Intelligence Analytics
nGeniusONE Management Software and Analytic Modules - NetScout'sOur nGeniusONE management software is used to support our enterprise, service provider, enterprise, and government customers enabling them to predict, preempt, and resolve


network and service delivery problems while facilitating the optimization and capacity planning of their network infrastructures. Other products acquired as part of the Comms Transaction are supported by their own respective management software and related analytics. Additionally, NetScout marketswe market a range of specialized platforms and analytic modules that can enable itsour customers to analyze and troubleshoot traffic in radio access network and WiFi networks, as well as gain timely insight into high-value services, applications and systems, and better understand the subscriber’s experience on the network. nGeniusPULSE is an active testing tool that enables enterprises to identify infrastructure performance issues and determine application availability, reliability, and performance. NetScoutWe also markets itsmarket our nGenius Business Analytics solution, which enables service providers to quickly and efficiently analyze their network traffic to gain greater and more timely insights into their subscribers, services, networks, and applications, as well as easily export our smart data into their data lakes and into third-party analytic platforms.
Visibility Products (Probes, Packet Flow Systems and Taps) - NetScout'sOur ISNG platform provides real-time collection and analysis of information-rich, high-volume packet-flow data from across the network that is displayed through the nGeniusONE Service Assurance Solution. The ISNG is an advanced passive network probe that can be deployed as a traditional appliance with integrated hardware and software, as software-only for use in commercial-off-the-shelf hardware or in virtualized or software only form factors. The virtualized form factor version of our intelligent data source, which is marketed as vSTREAM, can be deployed to support NFV environments as well as to cost-effectively monitor application performance in traditional data center, private cloud, and public cloud environments. NetScoutWe also providesprovide comprehensive packet flow systems (also called network packet brokers or network visibility fabric switches), that deliver targeted network traffic access to a range of monitoring and securitycybersecurity tools and systems, including the nGeniusONE Service Assurance platform. Additionally, NetScout marketswe market a suite of test access points (TAPs) that enable full, non-disruptive access to network traffic with multiple link type and speed options.
Cybersecurity Solutions
DDoS ProtectionNetScout provides securityWe provide cybersecurity solutions that enable service providers and enterprises around the world to protect their networks against DDoS attacks under the Arbor brand. Dozens of service provider customers around the world also resell Arbor's solutions as a managed DDoS service to their enterprise customers. Our portfolio of DDoS solutions offers complete deployment flexibility spanning on-premise offerings and cloud-based capabilities to meet a broad array of customer needs, as well as specialized analytics and comprehensive threat intelligence information. Our smart DDoS offerings for service providers include Arbor Sightline for DDoS visibility and threat detection, product, Arbor Threat Mitigation System for removing DDoS attack traffic from the network without disruption to key network services and Arbor Insight for advanced analytical and forensic information. Our smart DDoS offerings for enterprises include Arbor Edge Defense, a perimeter-based appliance for identifying and blocking incoming DDoS attacks and outbound malicious communications, and Arbor Cloud, a global, cloud-based traffic scrubbing service that quickly removes DDoS attack traffic. We plan to further enhance and expand these capabilities in ways that will enable greater adoption of our solutions by service provider and enterprise customers.
Advanced Threat Detection – We are in the process ofactively expanding our enterprise securitycybersecurity offerings to better leverage the investment that NetScout’sour enterprise customers have made in our traditional service assurance solutions. By collecting network traffic via our probes, we can expand our value proposition by providing specialized analytics for both service assurance and security. Over the coming quarters, we planWe have introduced and will continue to introduceadvance solutions such as new packet forensic capabilities, such as Omnis Cyber Investigator, designed specifically for security operations teams as well as new anomalous behavior analytics that security teams can use to identify and investigate potential advanced network threats.


Integration with Third-Party Solutions
To have greater operational impact on assuring performance of applications and service delivery, NetScout haswe have integrated itsour technology with third-party management consoles and business service management systems. This integration allows organizations to receive alarms on impending performance problems and to link into the nGenius Service Assurance solution in order to perform detailed problem analysis and troubleshooting. The third-party solution providers that NetScout haswe have integrated itsour solutions with areinclude Cisco Systems, Cisco Sourcefire, Citrix Systems, Dell Technologies, Hewlett-Packard Company, IBM Tivoli, and VMWare. In addition, we have embedded NetScout Arbor DDoS mitigation capabilities on a blade within Cisco's market-leading ASR9000 router and will continue to evaluate partnership opportunities to integrate its smart DDoS capabilities within other network equipment platforms.

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Growth Strategy
The following are key elements in our growth strategy for fiscal year 2020:2022:
Drive Innovation - In order to support our customers' near-term and longer-term requirements, we plan to continue innovating by enhancing and expanding our product portfolio. In particular, we continue to invest in research and development, and leverage the strong technical and domain expertise across itsour organization. Our engineering teams are focused on advancing technical innovation across itsour broad product portfolio. By capitalizing on our extensive experience with global enterprise, service provider and government organizations with IP-based networks, we remain well positioned to cross-leverage itsour technology development across all major platforms and relevant technologies to address the evolving demands of current and prospective customers.
Deliver Pervasive Visibility - By making our visibility products available in multiple form factors, including software that can be deployed with commercial off-the-shelf servers and as virtual appliances, we believe that it is easier and more affordable for customers to deploy our technology more broadly across their hybrid network and IT infrastructures. By offering more cost-effective instrumentation options, we are well positioned to help existing and new customers gain greater visibility into more places across their end-to-end network environments and address an even broader range of service assurance and securitycybersecurity use cases.
Extension into Adjacent Markets -By enhancing and expanding our product portfolio and driving product integration via internal development and acquisitions, we have expanded our reach into complementary adjacent markets such as application performance management, infrastructure performance management, big data analytics, and cybersecurity. We believe that this element of our strategy is integral to gaining access to larger budgets, increasing spending from existing customers, attracting new customers, and increasing our total addressable market. In particular, we plan to broadenare broadening our securitycybersecurity solutions beyond the DDoS market with plans for new enterprise security offerings that can help our customers extract more value from the network traffic that we are already collecting to support service assurance use cases.
Fortify and Expand Existing Customer Relationships - We have an expansive, global customer base of service providers and enterprises that have purchased our products in support of major technology and network initiatives that they have implemented over the past decade. As a result, we believe we are well positioned to expand the scope of many of these relationships as well as acquire new customer relationships as we identify new opportunities to support new network, cybersecurity, and broader technology projects.
Expand our Customer Base - The investments we have made over the past several years to expand our product portfolio and support greater deployment flexibility also positions us to win new customers in established geographic markets where we can leverage our global direct sales organization and an extensive network of value-added resellers and systems integrators.
Increase Market Relevance and Awareness - We plan to continue to implement marketing campaigns aimed at generating high-quality sales opportunities with both current and prospective enterprise and service provider customers, promoting thought leadership and building the NetScout brand.
Extend our Technology Partner Alliance Ecosystem - We plan to continue to develop and fortify alliances with complementary solutions providers that can help us support a larger, more global and more diverse customer base. We also plan to continue to enhance our technology value, product capabilities and customer relevance through the continued integration of our products into technology partner products.
Pursue Strategic Acquisitions - We have completed many acquisitions since our inception that have helped broaden our capabilities, enhance our products and technologies, enable us to expand into adjacent markets and better position us to meet the needs of a larger base of customers and prospects.
Improve Cost Structure and Drive Efficiencies - We plan to balance our investments in key technology, product development, sales and marketing, and other initiatives that will enable us to drive long-term profitable growth with an ongoing focus on controllingmanaging costs and driving efficiencies. During fiscal year 2019, we divested the handheld network test tools (HNT) product lines, reduced personnel costs via a voluntary separation program and other related actions, consolidated certain facilities and carefully managed discretionary spending.
Support Services
Customer satisfaction is a key driver of our success. Our support programs offer customers various levels of high-quality support services to assist in the deployment and use of our solutions. We have support personnel strategically deployed across the globe to deliver 24/7 support to our premium customers. Certain support services, such as on-site support activities, are provided by qualified third-party support partners. In addition, many of our certified resellers provide Partner Enabled Support


to our end users. This is especially prevalent in international locations where time zones and language, among other factors, make it more efficient for end users to have the reseller provide initial support functions. Our support also includes updates to
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our software and firmware at no additional charge, if and when such updates are developed and made generally available to our commercial customer base. If ordered, support commences upon shipment or expiration of the standard warranty for software. For software, which also includes firmware, the standard warranty commences upon shipment and expires 60 to 90 days thereafter. With regard to hardware, the standard warranty commences upon shipment and expires 60 days to 12 months thereafter. We believe our warranties are consistent with commonly accepted industry standards. We expect to continue to provide support services for the acquired platforms under existing agreements and plan to explore opportunities to further simplify and standardize our support obligations over the coming years.
Manufacturing
Our manufacturing operations consist primarily of final product assembly, configuration, and testing. We purchase components and subassemblies from suppliers and construct our hardware products in accordance with NetScout standard specifications. We inspect, test and use process controls to ensure the quality and reliability of our products. We maintain an ISO 9001 quality systems registration, a certification showing that our corporate procedures and manufacturing facilities comply with standards for quality assurance and process control. We also maintain an ISO 9001:2000 quality systems registration, a certification showing that our corporate procedures comply with standards for continuous improvement and customer satisfaction.
We generally use standard parts and components for our products, which can be sourced from various suppliers. We have generally been able to obtain adequate supplies of components in a timely manner from current suppliers. While certain components, such as computer network interface cards, are currently purchased from a single supplier, we have identified alternate suppliers that we believe can be qualified relatively quickly to fulfill our needs should an issue arise with the existing supplier. Our reliance on single source suppliers is further described in Item 1A "Risk Factors."
We manufacture our products based upon near-term demand estimates resulting from sales forecasts and historical fulfillment information. However, since these forecasts have a high degree of variability because of factors that include time of year, overall economic conditions and sales employee incentives, we believe it is prudent to maintain inventory levels in advance of receipt of firm orders to ensure that we have sufficient stock toto satisfy incoming orders. Our inventory management system has thus far enabled us to minimize the effects of the disruption caused by the global COVID-19 pandemic from a supply chain perspective. The potential impact of the COVID-19 pandemic on our business is further described in Item 1A "Risk Factors."
Sales and Marketing
Sales
We sell our products, support and services through a direct sales force and an indirect reseller and distribution channel.
Our direct sales force generally uses a "high-touch" sales model that consists of face-to-face meetings with customers to understand and identify their unique business challenges and requirements. In the current global pandemic environment, our sales teams have been successful in engaging customers virtually to understand their requirements and effectively design solutions. Our sales teams then translate thoseour customers' requirements into tailored business solutions that allow the customer to maximize the performance of its infrastructure and service delivery environment. Due to the complexity of the systems and the capital expenditures involved, our sales cycles typically take between three and twelve months. We build strategic relationships with our customers by continually enhancing our solution to help them address their evolving service delivery management challenges. In addition to providing a comprehensive solution to meet these needs, we continually provide software enhancements to our customers as part of their maintenance contracts with us. These enhancements are designed to provide additional and ongoing value to our existing customers to promote loyalty and the expansion of their deployment of our products. Existing customer growth is also driven by the expansion and changes in their networks as they add new infrastructure elements, new users, new locations, new applications, and experience increasing service traffic volumes. In recent months, we have taken steps to drive more effective cross-selling of our service assurance and security solutions into our installed customer base by consolidating the previously separate security and service assurance salesforces and by realigning existing sales resources accordingly.volumes or encounter incremental cyber threats.
We also maintain an indirect reseller and distribution channel. Sales to customers outside the United States are primarily export sales through channel partners. Our channel partners assist us by improving our reach to customers, extending our presence in new markets, and marketing and selling our products to a broad array of organizations globally. We sell through a range of channel partners including value-added resellers, value-added distributors, resellers, and system integrators, to our enterprise, service provider and government customers. Historically and currently, we have used indirect distribution channels principally as intermediaries on contractual terms for customers with whom we do not have a contract. Our sales force meets with end user customers to present our products and solutions, conduct demonstrations, provide evaluation equipment, recommend detailed product solutions, develop product deployment designs and timelines, and assist in establishing financial and other justifications for the proposed solution. During this selling process, a channel partner, who has contracts with both the end customer and us, may be brought in to facilitate the transaction and to provide fulfillment services. In the case of
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international channel partners, those services usually also include currency translation and support. In the U.S., fulfillment


services are usually limited to invoicing and cash collection. Under this approach, we have limited dependence upon channel partners for the major elements of the selling process. In many cases, there are multiple channel partners with the required contractual relationships, so dependence on any single channel partner is not significant.
During the fiscal yearsyears ended March 31, 20192021, 2020 and 20182019, no direct customers or indirect channel partners accounted for more than 10% of our total revenue. During the fiscal year ended March 31, 2017, one direct customer, Verizon Communications, Inc. (Verizon), accounted for more than 10% of total revenue, while no indirect channel partner accounted for more than 10% of total revenue.
Marketing
Our marketing organization drives our market research, strategy, product positioning and messaging, and produces and manages a variety of programs such as customer forums, trade shows, industry events, advertising, public and analyst relations, social media, direct mail, seminars and webinars, sales promotions and other online marketing programs. These programs are focused on promoting the sale and acceptance of our solutions to further build the NetScout brand as well as the ASI, nGenius, Arbor and other applicable product brand names in the marketplace.
Key elements of our marketing strategy focus on thought leadership, market positioning, market education, go to market strategies, reputation management, demand generation, and the acceleration of our strategic selling relationships with local and global resellers, systems integrators, and our technology alliance partners. During fiscal year 2019, NetScout2021, we continued to invest in the promotion of the NetScout brand as well as the nGenius and Arbor brands as core solution-level brands in their respective markets. We expect to continue these initiatives during fiscal year 2020.2022.
Research and Development
Our continued success depends significantly on our ability to anticipate and create solutions that will meet emerging customer requirements. NetScout worksWe work closely with itsour largest enterprise and service provider customers to better understand and address their near-term and longer-term requirements. By better understanding the key, time-sensitive needs of NetScout'sour global customer base, we believe NetScout'sour development programs will continue to result in enhanced products that are able to meet the increasing challenges of an increasingly complex and dynamic global network environment.
We have invested significant financial resources and personnel into the development of our products and technology. Our continued investment in research and development is crucial to our business and our continued success in the market. We have assembled a team of highly skilled engineers with expertise in various technologies associated with our business and the technologies being deployed by our customers. We plan to continue to enhance and expand our product offerings and capabilities in the near future while integrating key capabilities from acquired product lines as appropriate. As a result, we plan to continue to invest and dedicate significant resources to our research and development activities for both our enterprise and service provider customers. Additionally, we continue to support the legacy product lines that we acquired as a result of the Comms Transaction and work closely with customers on migrating to our next-generation offerings.
We predominantly develop our products internally, with some limited third-party contracting. We have also acquired developed technology through business acquisitions. To promote industry standards and manifest technology leadership, we participate in and support the activities and recommendations of industry standards bodies, and we also engage in close and regular dialogue with our key customers and alliance partners. These activities provide early insight into the direction of network and application performance requirements forand the changing cybersecurity landscape that impacts current and emerging technologies.
Seasonality
We have experienced, and expect to continue to experience, quarterly variations in our order bookings as a result of a number of factors, including the length of the sales cycle, complexity of customer environments, new product introductions and their market acceptance and seasonal factors affected by customer projects and typical IT buying cycles. Due to these factors, we historically have experienced stronger bookings during our fiscal third and fourth quarters than in our fiscal first and second quarters.
Customers
We sell our products to enterprises, service providers and local, state, and federal governmental agencies with large- andlarge-and medium-sized high-speed IP computer networks. Our enterprise customers cover a wide variety of industries, such as financial services, technology, manufacturing, healthcare, utilities, education, transportation and retail.retail as well as government and associated agencies. Our telecommunications service provider customer group includes mobile operators, wireline operators, cable operators, internet service providers, and cloud providers.

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Backlog
We produce our products on the basis of our forecast of near-term demand and maintain inventory in advance of receipt of firm orders from customers. We configure our products to customer specifications and generally deliver products shortly after receipt of the purchase order. Service engagements are also included in certain orders. Customers generally may reschedule or cancel orders with little or no penalty. We believe that our backlog at any particular time is not meaningful because it is not necessarily indicative of future sales levels. Our combined product backlog at March 31, 20192021 was $19.8$27.9 million compared to $28.0$29.4 million at March 31, 2018.2020. A majority of the backlog relates to customization and integration projects from our acquired business units. and radio frequency propagation modeling. In some cases, we have begun these projects but have not yet hit billable milestones. A majority of revenue for these projects is expected to be recognized into revenue throughout fiscal year 2020.2022.
Competition
We compete with many companies in the markets we serve. The service assurance market, including the infrastructure, network, and application performance management markets, is highly competitive, rapidly evolving, and fragmented with overlapping technologies and a wide range of competitors, both large and small, who may deliver certain elements of our solution. Consequently, there are a number of companies who have greater name recognition and substantially greater financial, management, marketing, service, support, technical, distribution and other resources than we do. Additionally, certain competitors, either due to their size and resources or due to their technological strengths, may be able to respond more effectively than we can to new or changing opportunities, technologies, standards and customer requirements.
Principal competitive factors in our service assurance market include scalability; ability to address a large number of applications, locations and users; product performance; the ability to easily deploy into existing network environments; the ability to offer virtualized solutions; and the ability to administer and manage the solution.
While we face multiple competitors within the service assurance industry, we believe that we compete favorably on the basis of the following factors:
we provide a comprehensive service delivery management solution that is capable of addressing the needs of both enterprise and service provider customers and can be scaled to meet the challenges of today's dynamic service delivery environments;
we believe that our solutions provide superior data and compete favorably on a broad range of metrics including the ability to recognize and track a large number of applications;
we believe our solutions possess the scalability to support high and increasing levels of data and network traffic;
our solutions look at both data and control plane traffic across an entire network; and
our ASI technology is optimized to provide real-time information about service performance and real-time alerts to emerging service problems whereas traditional solutions are inherently latent, supporting only forensic-trouble shooting after an issue has occurred.
In the enterprise market, our competitors include companies who provide network performance management, application performance management, infrastructure performance management and other related solutions such as Avaya, CA Technologies (a Broadcom Inc. business), Cisco Systems, Dynatrace, Datadog, ExtraHop, InfoVista,IBM, Infovista, Keysight, SevOne, Viavi, Gigamon, Lancope, Corvil, ThousandEyes, New Relic, Riverbed Technology, Splunk and SolarWinds. In addition, we both compete with and partner with large enterprise management vendors, such as HP and IBM, who offer performance management solutions. We also compete with smaller, privately held competitors who often focus on specific vertical markets.
In the service provider market, we compete with traditional probe vendors, network equipment manufacturers, big data and analytics vendors, and virtualization vendors. These vendors include Alcatel-Lucent, Anritsu, Cisco, Empirix, Ericsson, Dell Technologies, EXFO, (which acquired Astellia in March 2018), Guavas, Huawei, IBM, Infovista, Niksun, Polystar (an Elisa Oyj business), Radcom, SevOne, Splunk, Nokia and Viavi. We face additional competitive threats from startups and new entrants that seek to offer innovative solutions in an industry characterized by rapid technological change.
In the cybersecurity market, we face a range of competitors, including those that may have greater name recognition and substantially greater financial, management, marketing, service, support, technical, distribution and other resources than we do. We believe that the scalability of our solutions, flexible deployment, and price-performance of our cybersecurity solutions positions us well to compete against both larger network equipment and security companies and smaller niche security solutions vendors.

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In the DDoS solutions market, we compete under the NetScout Arbor brand with a broad range of vendors including Radware, Akamai, F5 Networks, A10 Networks, Fortinet, Fastly, Cloudflare and Corero Network Security. In the market for specialized threat analysis, packet forensics and protection solutions used to identify advanced network threats, we compete with a range of vendors including Darktrace, Vectra Networks, FireEye, Cisco, Palo Alto Networks, RSA (a Dell Technologies business) and other specialist providers.
Our ability to sustain a competitive advantage depends on our ability to deliver continued technology innovation and adapt to meet the evolving needs of our customers. Competitive factors in our industry are further described in Item 1A "Risk Factors."
Intellectual Property Rights
We rely on patent, copyright, trademark, and trade secret laws and contract rights to establish and maintain our rights in our technology and products. While our intellectual property rights are an important element in our success, our business as a whole does not depend on any one particular patent, trademark, copyright, trade secret, license, or other intellectual property right.
We use contracts, statutory laws, domestic and foreign intellectual property registration processes, and international intellectual property treaties to police and protect itsour intellectual property portfolio and rights from infringement. From a contractual perspective, we use license agreements and non-disclosure agreements to control the use of our intellectual property and protect our trade secrets from unauthorized use and disclosure. In addition to license agreements, we rely on U.S. and international copyright law to protect against unauthorized copying of software programs in the U.S. and abroad. We have obtained U.S. and foreign trademark registrations to preserve and protect certain trademarks and trade names. We have also filed and obtained U.S. patents and international counterparts to protect certain unique NetScout inventions from being unlawfully exploited by other parties. However, there is no assurance that pending or future patent applications will be granted, that we will be able to obtain patents covering all of our products, or that we will be able to license, if needed, patents from other companies on favorable terms or at all. Our proprietary rights are subject to other risks and uncertainties described under Item 1A "Risk Factors."
Employees
AtAs of March 31, 2019,2021, we had 2,421 employees worldwide – over 99% of whom were full time employees. Our employees are in over 35 countries with 64% of our employees located in the United States.
Compensation and Benefits
We offer a totalcompetitive compensation and benefits package to attract, retain and motivate our employees. Our compensation package includes market-competitive pay, incentive compensation, restricted stock unit grants (RSU’s), an Employee Stock Purchase Plan, retirement benefits, health benefits, paid time off and leave benefits.
Diversity, Equity & Inclusion
Diversity, equity, and inclusion (DEI) are the cornerstones of 2,585our organizational excellence and complement our core values of performing with integrity, compassion, collaboration, and innovation. We embrace and encourage our employees' differences in age, color, disability, ethnicity, family or marital status, gender identity or expression, language, national origin, physical and mental ability, political affiliation, race, religion, sexual orientation, socio-economic status, veteran status, and other characteristics that make our employees unique. As such, we strive to demonstrate our commitment to DEI at the highest levels. Educating our employees about our DEI initiatives is a priority. In addition, we recently chartered a DEI team to ensure transparent and equitable processes for employee engagement, onboarding, learning and development, policy making, and career planning.
Culture & Values
We believe that our company culture is critical to our success and growth. Our culture complements and acts as a multiplier to our technology, exceptional talent, and forward-thinking innovation. As a result of our philosophy, we have pledged to be considerate, loyal and appreciative of our employees while also enacting decision-making processes and business strategies that result in efficient business outcomes.
We take seriously our mission as Guardians of the Connected World. We recently launched our internal NETSCOUT WITHOUT BORDERS initiative, of which a key component is an employee engagement program to continuously
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communicate our mission and goals to all of our global employees through a series of town hall meetings that provide direct interaction with the CEO, in-depth focus groups, and follow-on development programs. This is a significant investment to stay connected with all employees, and to ensure everyone is equipped with the knowledge and tools and aligned with our mission.
COVID-19 Response
During the COVID-19 pandemic, our top priority has been the safety and well-being of our employees and their families to ensure that they continue to be productive and keep our customers and the world connected. As the severity and scope of the pandemic became known in early calendar year 2020, we curtailed travel and required all employees, in all locations, to work from home, with only a limited numbers of employees with business-critical tasks provided access to our facilities. For those employees who needed to be on-site, we established multiple protective measures to ensure the safety of our employees. Throughout the course of the COVID-19 pandemic, we were able to maintain our unique culture, support our employees with well-being programs and uninterrupted salary and benefits, and maintain our market presence and unfailingly superior service levels to our customers.
Corporate Information
Our corporate headquarters are located at 310 Littleton Road, Westford, Massachusetts, and our telephone number is (978) 614-4000. We were incorporated in Delaware in 1984.
Our internet address is http://www.NetScout.com. Our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and amendments to reports filed pursuant to Sections 13(a) and 15(d) of the Exchange Act, are made available free of charge on or through our website at ir.netscout.com as soon as reasonably practicable after such reports are filed with, or furnished to, the SEC. None of the information posted on our website is incorporated by reference into this Report.
We webcast our earnings calls and certain events we participate in or host with members of the investment community. They are made available on our investor relations website at ir.netscout.com//investors/events-and-presentations/events-calendar/default.aspx. Additionally, we provide notifications of news or announcements regarding our financial performance, including SEC filings, investor events, press and earnings releases, as part of our investor relations website. The contents of these sections of our investor relations website are not intended to be incorporated by reference into this report or in any other report or document we file with the SEC.






Item 1A. Risk Factors.
In addition to the other information in this report, the following factors should be considered carefully in evaluating NetScout and our business.
Our operating results and financial condition have varied in the past and may vary significantly in the future depending on a number of factors. Except for the historical information in this report, the matters contained in this report include forward-looking statements that involve risk and uncertainties. The following factors are among many that could cause actual results to differ materially from those contained in or implied by forward-looking statements made in this report. These statements involve the risks and uncertainties identified below as well as additional risks and uncertainties that are not yet identified or that we currently think are immaterial but may also impact our business operations. Such factors are among many that may have a material adverse impact upon our business, results of operations, liquidity, and financial condition.
You should carefully consider carefully the risks and uncertainties described below, together with the information included elsewhere in this Annual Report on Form 10-K and other documents we file with the SEC. The risks and uncertainties described below are those that we have identified as material but are not the only risks and uncertainties facing us. Our business is also subject to general risks and uncertainties that affect many other companies. Additional risks and uncertainties not currently known to us or that we currently believe are immaterial also may impair our business, including our results of operations, liquidity, and financial condition.
Because of the following factors, as well as other variables affecting our results of operations, past financial performance may not be a reliable indicator of future performance, and historical trends should not be used to anticipate results or trends in future periods.
Summary of the Material Risks Associated with Our quarterly revenueBusiness
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These risks include, but are not limited to, the following:

Our business and operating resultsoperations, and the operations of our customers, partners, and/or suppliers, may fluctuate.be adversely affected by epidemics and pandemics, such as the COVID-19 pandemic.
Our quarterly revenue and operating results are difficult to predict and may fluctuate significantly from quarter to quarter, as a result of a variety of factors associated withUnfavorable conditions in our industry manyor the global economy, or reductions in information technology spending, could limit our ability to grow our business and negatively affect our results of whichoperations.
Potential product vulnerabilities or critical security defects, prioritization decisions regarding remedying vulnerabilities or security defects, or customers not deploying security releases or deciding not to upgrade products, services, or solutions could result in claims of liability against us, damage our reputation, or otherwise harm our business.
If we or third parties who we work with experience a security incident, or the confidentiality, integrity, or availability of our information technology, software, services, communications or data is compromised, our business or platform may be outside ofperceived as not being secure, our control, includingreputation may be harmed, demand for our offering may be reduced, and we may incur significant liabilities.
Our ability to quickly and successfully recover from a disaster, public health crisis (including a global pandemic such as the following:COVID-19 pandemic), or other business continuity event could affect our ability to deliver our products and negatively impact our business reputation.
the rate of growth of,If our products contain errors or quality issues, such issues may be costly to correct, revenue may be delayed, we could be sued, and changes in technology trends in, our marketreputation could be harmed.
If we fail to introduce new products and other industries in which we currently operatesolutions or may operate in the future;
technology spending by currentenhance our existing products and potential customers, and the timing and size of orders from customers, especially in light of our lengthy sales cycle;
reducedsolutions to keep up with rapid technological change, demand for our products and unevensolutions may decline.
Our success depends, in part, on our ability to manage our international research and development operations and related partnerships. Our international research and development efforts may achieve delayed or lower than expected benefits and involve competitive and other risks.
Necessary licenses for third-party technology may not be available to us on commercially reasonable terms or at all.
Increased customer demands on our technical support services may adversely affect our relationships with our customers and our financial results.
The success of our business depends, in part, on the continued growth in the market for and the continued commercial demand for service delivery, and network and application performance management solutionsservice assurance and network security solutions;solutions focused on the performance monitoring and management of applications and networks.
Failure to manage growth properly and to implement enhanced automated systems could adversely impact our business.
Our growth could suffer if the timingmarkets into which we sell our products and market acceptance of new products or product enhancements by usservices experience cyclicality.
Our reliance on sole source suppliers could adversely impact our business.
We or our competitors;suppliers may be affected by new regulations related to climate change or other environmental issues.
the timing of hiring sales personnel and the speed at which such personnel become fully productive;
Our success depends, in part, on our ability to manage and leverage our distribution channels. Disruptions to, or our failure to effectively develop and manufacture new productsmanage, these partners and technologies in a timely manner, the competitive positionprocesses and procedures that support them could adversely affect our ability to generate revenues from the sale of our products and the continued acceptance of our products by our customers and in the industries that we serve;services.
changes in the number and size of our competitors, including the effects of new entrants and the effects of well-resourced competitors increasing their investment in our markets, and changes in the prices and capabilities of competitors' products;
customer ability to implement our products;
cancellation, deferral, or limitation of orders by customers;
changes in foreign currency exchange rates;
attrition of key employees and competition with other companies for employees with specific talents and experience;
the number, severity, and timing of cyber-related threat outbreaks (e.g., malware, attacks, worms and viruses);
the quality and level of our execution of our business strategy and operating plan, and the effectiveness of our sales and marketing programs;
changes in accounting rules;
costs related to acquisitions; and
Our success depends on our ability to manage expenses.protect our intellectual property rights.
Most of our expenses, such as employee compensation, benefits and rent, are relatively fixed in the short term. Moreover, our expense levels are based, in part, on our expectations regarding future revenue levels. As a result, if revenue for a particular quarter is significantly below our expectations, weOthers may not be able to reduce operating expenses proportionately for that quarter, and, therefore, this revenue shortfall would have a disproportionately negative impact on our operating results for that quarter.


It may be necessary in the future to undertake cost reduction initiatives to improve profitability, which could lead to a deterioration of our competitive position. Any difficultiesclaim that we encounter as we reduce our costs could negatively impact our results of operations and cash flows.infringe on their intellectual property rights.
Our actual operating results may differ significantly from our guidance.
We release guidance in our quarterly earnings conference calls, quarterly earnings releases, or otherwise, regarding our future performance that represents our management’s estimates as of the date of release. This guidance, which includes forward-looking statements, is based on projections prepared by our management.
Projections are based upon a number of assumptions and estimates that, while presented with numerical specificity, are inherently subject to significant business, economic and competitive uncertainties and contingencies, many of which are beyond our control and are based upon specific assumptions with respect to future business decisions, some of which will change. The principal reason that we release guidance is to provide a basis for our management to discuss our business outlook with analysts and investors. We do not accept any responsibility for any projections or reports published by any such third parties.
Guidance is necessarily speculative in nature, and it can be expected that some or all of the assumptions underlying the guidance furnished by us will not materialize or will vary significantly from actual results. Accordingly, our guidance is only an estimate of what management believes is realizable as of the date of release. Actual results may vary from our guidance and the variations may be material. In light of the foregoing, investors are urged not to rely upon our guidance in making an investment decision regarding our common stock.
Any failure to successfully implement our operating strategy or the occurrence of any of the events or circumstances set forth in this "Risk Factors" section in this report could result in the actual operating results being different from our guidance, and the differences may be adverse and material.
Our indebtedness may limit our operations and our use of our cash flow, and any failure to comply with the covenants that apply to our indebtedness could adversely affect our liquidity and financial condition.
On January 16, 2018, we amended and expanded our existing credit facility (Amended Credit Agreement) with a syndicate of lenders. The Amended Credit Agreement provides for a five-year $1.0 billion senior secured revolving credit facility, including a letter of credit sub-facility of up to $75.0 million. We have used the new credit facility for working capital purposes and to finance the repurchase of common stock under our previously announced accelerated stock repurchase plan. The commitments under the Amended Credit Agreement will expire on January 16, 2023, and any outstanding loans will be due on that date. As of the date of this report, we had approximately $500 million in outstanding indebtedness under the Amended Credit Agreement. Our debt level can have negative consequences, including exposing us to interest rate risk. We may incur significantly more debt in the future, and there can be no assurance that our cost of funding will not substantially increase. Our current revolving credit facility also imposes certain restrictions on us; for a more detailed description please refer to "Management's Discussion and Analysis of Financial Condition and Results of Operations." Upon an event of default, for example, the administrative agent with the consent of, or at the request of, the holders of more than 50% in principal amount of the loans and commitments may terminate the commitments and accelerate the maturity of the loans and enforce certain other remedies under the Amended Credit Agreement and the other loan documents, which would adversely affect our liquidity and financial condition. If we take on additional indebtedness, the risks described above could increase.
Interest on the outstanding balances under our Amended Credit Agreement is calculated based on the London Interbank Offered Rate (LIBOR). On July 27, 2017, the U.K. Financial Conduct Authority (FCA), which regulates LIBOR, announced that it will no longer require banks to submit rates for the calculation of LIBOR after 2021. That announcement indicates that the continuation of LIBOR on the current basis cannot and will not be guaranteed after 2021. In the meantime, actions by the FCA, other regulators, or law enforcement agencies may result in changes to the method by which LIBOR is calculated. These reforms and other pressures may cause LIBOR to disappear entirely or to perform differently than in the past. The consequences of these developments cannot be entirely predicted but could include an increase in the cost of our variable rate indebtedness.
Any failure to meet our debt obligations could damage our business.
OurWe may fail to secure necessary additional financing.
The failure to recruit and retain qualified personnel and plan for and manage the succession of key executives could hinder our ability to meetsuccessfully manage our obligations underbusiness, which could have a material adverse effect on our financial position and operating results.
We may not successfully complete acquisitions or integrate acquisitions we do make, which could impair our ability to compete and could harm our operating results.
We face significant competition from other technology companies.
Uncertainties of regulation of the Amended Credit Agreement will dependInternet and data traveling over the Internet could have a material and adverse impact on market conditionsour financial condition and our future performance, which isresults of operations.
We are subject to economic, financial, competitivestringent and changing laws, regulations, standards, contractual obligations, and other factors beyond our control. Ifobligations related to privacy, data protection, and data security. The actual, alleged, or perceived failure by us or the partners we are unablework with to remain profitable or if we use more cash than we generate in the future, our level of indebtedness atcomply with such timeobligations could adversely affect our business, results of operations, by increasing our vulnerability to adverse changes in general economic and industry conditions and by limiting or prohibiting our ability to obtain additional financing for additional capital expenditures, acquisitions and generalfinancial conditions.

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corporate and other purposes. In addition, if we are unable to make payments as required under the Amended Credit Agreement, we would be in default under the terms of the loans, which could seriously harm our business. If we incur significantly more debt, this could intensify the risks described above.
Foreign currency exchange rates may adversely affect our financial statements.
An increasing portion of our revenue is derived from international operations. Our consolidated financial results are reported in U.S. dollars. Most of the revenue and expenses of our foreign subsidiaries are denominated in local currencies. Given that cash is typically received over an extended period of time for many of our license agreements and given that a material and increasing portion of our revenue is generated outside of the United States, fluctuations in foreign exchange rates (including the Euro) againstIf we violate the U.S. dollarForeign Corrupt Practices Act or applicable anti-bribery laws in other countries, or if we fail to comply with U.S. export controls and government contracting laws, our business could result in substantial changes in reported revenuesbe harmed.
The current economic and operating results duegeopolitical environment may impact some specific industries into which we sell and may lead our customers to the foreign exchange impact upon translationdelay or forgo technology investments and could have other impacts, any of these transactions into U.S. dollars.
In the normal course of business, we employ various hedging strategies to partially mitigate these risks, including the use of derivative instruments. These strategies may not be effective in fully protecting us against the effects of fluctuations from movements in foreign exchange rates. Fluctuations of the foreign exchange rateswhich could materially adversely affect our business, financial condition, operating results and cash flow.flows.
Additionally, salesInternational economic, political, legal, compliance and purchases in currencies other than the U.S. dollar expose us to fluctuations in foreign currencies relative to the U.S. dollar and may adverselybusiness factors could negatively affect our financial statements. Increased strengthstatements and growth.

The summary risk factors described above should be read together with the text of the U.S. dollar increasesfull risk factors below and in the effective priceother information set forth in this Annual Report on Form 10-K, including our consolidated financial statements and the related notes, as well as in other documents that we file with the SEC.

Risks Related to Our Business and Industry
Our business and operations, and the operations of our products sold in U.S. dollars into other countries, whichcustomers, partners, and/or suppliers, may require us to lower our prices or adversely affect sales to the extent we do not increase local currency prices. Decreased strength of the U.S. dollar could adversely affect the cost of materials, products and services we purchase overseas. Sales and expenses of our non-U.S. businesses are also translated into U.S. dollars for reporting purposes and the strengthening or weakening of the U.S. dollar could result in unfavorable translation effects. In addition, we may invoice customers in a currency other than the functional currency of our business, and movements in the invoiced currency relative to the functional currency could also result in unfavorable translation effects. We also face exchange rate risk from our investments in subsidiaries owned and operated in foreign countries.
Our effective tax rate may fluctuate, which could increase our income tax expense and reduce our net income.
Our effective tax rate or the taxes we owe could be adversely affected by several factors, manyepidemics and pandemics, such as the COVID-19 pandemic. The COVID-19 pandemic and future epidemics and pandemics risk disrupting and adversely affecting our business operations and financial results, as well as the markets and communities in which we and our customers, suppliers and other business partners operate.
We face risks related to epidemics, pandemics, and other outbreaks of communicable diseases that adversely affect global commercial activity, economies, financial markets, and companies. The outbreak of COVID-19 was declared a "pandemic" by the World Health Organization on March 11, 2020. An epidemic or pandemic or other outbreak of communicable diseases, such as the current COVID-19 pandemic, poses the risk that we or our customers, suppliers, and other business partners may be disrupted or prevented from conducting normal business activities for certain periods of time, the durations of which are outsideuncertain, and may otherwise experience significant impairments of business activities.
In response to the COVID-19 pandemic, many state, local, and foreign governments have put in place, and others in the future may put in place or continue, quarantines, executive orders, shelter-in-place orders, and similar government orders and restrictions to reduce the rate of infection and control the spread of the disease. Such orders or restrictions, or the perception that such orders or restrictions could occur, may continue to result in business closures, work stoppages, slowdowns and delays, travel restrictions and cancellation of events, among other effects that could affect productivity and disrupt our operations and those of our control, including:suppliers, customers, and business partners.
changesTo protect our employees, contractors, customers, suppliers, and our local communities, and limit the effect of the COVID-19 pandemic on our operations, many of our employees at our locations globally have been working remotely for the past year, with limited exceptions for site-essential personnel (with protective measures and protocols in the relative proportions of revenues and income before taxesplace). We may take further actions that alter our operations as may be required by federal, state, or local authorities, or by foreign governments in the various jurisdictionscountries in which we operate, or which we determine are in the best interests of our employees, suppliers, customers, business partners, and stockholders. We expect that work-from-home requirements and other restrictions on our employees, suppliers, customers, and business partners will change over time, whether becoming more or less restrictive, as the pandemic and global responses progress.
There continues to be uncertainty as to when all of our employees will be able to return to work on-site. Similar to other companies, we have differing statutory tax rates;
changing tax laws, regulations,begun planning for our employees to return to work on-site in phases, in accordance with federal, state, and interpretationslocal government guidelines, as well as in multiple jurisdictionsaccordance with foreign government guidelines in the countries in which we operate as well as the requirements of certain tax rulings;
certain provisions of the Tax Cutoperate. Furthermore, any process we implement to enable our employees to return to work on-site will be in accordance with prevailing health and Jobs Act and the regulations issued thereunder could have a significant impact on our future results of operations as could interpretations made by us in the absence of regulatoryscience guidance, and judicial interpretations;in a manner that seeks to protect our employees, contractors, customers, suppliers, and our local communities.
changes inAs part of our existing business continuity planning, we had established infrastructure and protocols to enable our employees to work from home. While we believe that the researchmajority of our employees are able to and development tax credit laws, earnings being lower than anticipated in jurisdictions where we have lower statutory ratescan continue to effectively work remotely, it is possible that disruptions to our business operations resulting from quarantines, self-isolations, or other movement and being higher than anticipated in jurisdictions where we have higher statutory rates;
changes in accounting and tax treatmentrestrictions on the ability of share-based compensation;
the valuation of generated and acquired deferred tax assets and the related valuation allowance on these assets;
transfer pricing adjustments;
the tax effects of purchase accounting for acquisitions and restructuring charges that may cause fluctuations between reporting periods; and
tax assessments or any related tax interest or penalties thatour employees to perform their jobs could significantly affect our income tax expense for the period in which the settlements take place.
We are subjectability to income taxes in the United Statesdevelop and in numerous foreign jurisdictions. From time to time, we may receive notices that a tax authoritydesign our products and services in a particular jurisdiction believes that we owe a greater amount of tax than we have reported to such authority.
While we regularly assess the likelihood of adverse outcomes from such examinations and the adequacy of our provision for income taxes, there can be no assurance that such provision is sufficienttimely manner or meet required milestones or customer commitments, and that a determination by a tax authority will notthis could have an adverse effect on our resultsrevenue and operating results. In addition, although we have been able to adequately staff our facilities with site-critical personnel with specific health and safety protocols, to satisfy our manufacturing and support obligations to our
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customers, it is possible that we or others may determine that it is necessary to direct that employees engaged in our effective tax ratemanufacturing and support refrain from working on-site for an indeterminate period of time, and that this could have a material andan adverse effect on our financial conditionrevenue and resultsoperating results.
Furthermore, global travel has been sharply curtailed, and in some cases prohibited. Our sales personnel often meet with customers or prospective customers in person to provide greater personalized service. While our employees and customers have adjusted to virtual meetings, the inability of operationsour sales personnel to meet with customers or prospective customers at a customer facility could have an adverse effect on our revenue and operating results.
In addition, we rely on third-party suppliers and manufacturers throughout the globe. The COVID-19 pandemic has resulted in the extended shutdown of certain businesses and the priceclosure of international borders throughout the world, which may result in disruptions to our supply chain. These may include disruptions from temporary closure of third-party supplier and manufacturer facilities, interruptions in product supply or restrictions on the export or shipment of our common stock could decline ifproducts, as well as the import of products into countries in which we operate. Although we have attempted to minimize the effects of these disruptions, it is possible that these attempts will be insufficient, and that these disruptions will likely have an adverse effect on our revenues and operating results.
To the extent the COVID-19 pandemic adversely affects our business and financial results, are materially affected by an adverse changeit may also have the effect of heightening many of the other risks described in this "Risk Factors" section, such as those relating to our effective tax rate.


We may fail to secure necessary additional financing.
Our future success may depend in partinternal controls over such estimates, as well as on our liquidity and on our ability to obtain additional financingsatisfy our indebtedness obligations, including the compliance with the covenants that apply to support our continued growth and operations and any downgradesindebtedness.
Unfavorable conditions in our credit ratingindustry or the global economy, or reductions in information technology spending, could affectlimit our ability to obtain additional financinggrow our business and negatively affect our results of operations.
Our results of operations may vary based on the impact of unfavorable changes in our industry or the global economy on us or our customers and potential customers. Unfavorable conditions in the economy both in the United States and abroad, including conditions resulting from financial and credit market fluctuations, international trade relations, political turmoil, natural catastrophes, outbreaks of contagious diseases (such as the ongoing COVID-19 pandemic), warfare and terrorist attacks on the United States, Europe, the Asia Pacific region or elsewhere, could cause a decrease in business investments, including spending on information technology, disrupt the timing and cadence of key industry events, and negatively affect the growth of our business and our results of operations. For example, these types of unfavorable conditions could disrupt the timing of and attendance at key industry events, which we rely upon in part to generate sales of our products. If those events are disrupted, our marketing investments, sales pipeline, and ability to generate new customers and sales of our products could be negatively and adversely affected. In addition, our competitors, many of whom are larger and have greater financial resources than we do, may respond to challenging market conditions by lowering prices in an attempt to attract our customers and may be less dependent on key industry events to generate sales for their products. In addition, the increased pace of consolidation in certain industries may result in reduced overall spending on our products and solutions. We cannot predict the timing, strength, or duration of any economic slowdown, instability, or recovery, generally or how any such event may impact our business.
Potential product vulnerabilities or critical security defects, prioritization decisions regarding remedying vulnerabilities or security defects, or customers not deploying security releases or deciding not to upgrade products, services, or solutions could result in claims of liability against us, damage our reputation, or otherwise harm our business.
The products and services we sell to customers, and our cloud-based solutions, may contain vulnerabilities or critical security defects which have not been identified or remedied. We may also make prioritization decisions in determining which vulnerabilities or security defects to fix, and the timing of these fixes, which could result in an exploit that compromises security.
Customers also sometimes need to test security releases before they can be deployed, which can delay implementation. In addition, we rely on third-party providers of software and cloud-based services, and we cannot control the rate at which they remedy vulnerabilities. Customers may also not deploy a security release or decide not to upgrade to the latest versions of our products, services, or cloud-based solutions containing the release, leaving them vulnerable.
If we or third parties who we work with experience a security incident, or the confidentiality, integrity, or availability of our information technology, software, services, communications or data is compromised, our business or platform may be perceived as not being secure, our reputation may be harmed, demand for our offering may be reduced, and we may incur significant liabilities.
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In the regular course of our business, we collect, use, store, transmit and process data, which can include information about our customers, employees, and others and which may be sensitive, proprietary, or confidential. Security incidents compromising the confidentiality, integrity, and availability of this information or our systems could result from a wide variety of cyberattacks, computer malware, viruses, social engineering (including phishing), ransomware, supply chain attacks, credential stuffing, efforts by individuals or groups of hackers and sophisticated organizations, including state-sponsored organizations, errors or malfeasance of our personnel, security vulnerabilities in the software or systems on which we rely, cyber extortion, and denial of service attacks. Such incidents have become more prevalent in our industry, and may in the future result in the unauthorized, unlawful, or inappropriate access to, inability to access, disclosure of, or loss of the sensitive, proprietary, and confidential information that we handle. Additionally, due to the ongoing COVID-19 pandemic, certain functional areas of our workforce remain in a remote work environment and outside of our corporate network security protection boundaries, which imposes additional risks to our business, including increased risk of industrial espionage, phishing, and other cybersecurity attacks, and unauthorized dissemination of sensitive, proprietary, or confidential information.
We also rely on third parties to operate our business systems and process the sensitive, proprietary, and confidential information that we handle. These third parties may affectnot have adequate security measures and could experience a security incident that compromises the termsconfidentiality, integrity, or availability of any such financing. Ifthe systems they operate for us or the information they process on our existing sourcesbehalf. Cybercrime and hacking techniques are constantly evolving, and we or third parties who we work with may be unable to anticipate attempted security breaches, react in a timely manner, or implement adequate preventative measures, particularly given increasing use of liquidityhacking techniques designed to circumvent controls, avoid detection, and remove or hide forensic information.
Although we have multiple and layered controls and security measures in place designed to prevent cyberattacks, experienced computer hackers are insufficientincreasingly organized and sophisticated and we cannot guarantee that our, or our third-party partners’ security measures will be sufficient to satisfyprotect against unauthorized access to our operating requirements,IT networks, software and systems. Malicious attack efforts operate on a large-scale and sometimes offer targeted attacks as a paid-for service. In addition, the techniques used to obtain access or sabotage networks change frequently and we may needbe unable to seekanticipate such techniques, implement adequate preventative measures, or stop security breaches that may arise from such techniques. As a provider of security solutions, we may be a more attractive target for such attacks. Other individuals or entities, including personnel or vendors, may also intentionally or unintentionally provide unauthorized access to raise capital by oneour IT environments.
If we or morethe third-parties who we work with were to experience a security incident or other incident that results in the compromise of the following:
issuing additional common stockconfidentiality, integrity, or availability of our sensitive or the sensitive, proprietary, or confidential information we process, we or our customers may experience system disruptions or slowdowns, security vulnerabilities of our products could be exploited, the information stored on our networks or those of our third-party service providers or partners could be accessed, publicly disclosed, misappropriated, deleted, altered, lost, or stolen, all of which could subject us to liability and cause us financial harm. Any actual, alleged or perceived security breach or incident affecting us, our partners or our industry as a whole could result in damage to our reputation, negative publicity, loss of partners, customers and sales, increased costs to remedy any problems and otherwise respond to any incident, regulatory investigations and enforcement actions, costly litigation, and other liability. In addition, we could incur substantial costs and liabilities, including but not limited to, expenses attributable to investigating, remediating and rectifying a security breach, cyberattack or other equity instruments;
acquiring additional bank debt;
issuing debt securities;incident (including the cost of repairing any damage to our or
obtaining lease financings.
However, we may not be able our customers' systems or restoring data from backups), liability for stolen assets or information, lost revenue and income resulting from any system or product downtime, increased costs for cybersecurity protection, and costs to obtain additional capital when we wantcomply with any notification obligations resulting from any security incidents (including notifying affected individuals or need it, or capital may not be available on satisfactory terms. Furthermore, any additional capital may have termsrelevant regulatory authorities). Such outcomes could damage our reputation, cause customers and conditions thatpossibly investors to lose confidence in us, and adversely affect our business such as new financial or operating covenants,results.
Additionally, efforts by hackers or that may result in additional dilutionothers could cause interruptions, delays or cessation of our product licensing, or modification of our software, which could cause us to lose existing or potential customers. If these efforts are successful and a third party obtains unauthorized access to our stockholders.
We expect that existing cash, cash equivalents, marketable securities, cash provided fromor our customers' IT environments, our business operations, and those of our bank credit facilities willcustomers could be sufficient to meet ongoing cash requirements. However,adversely affected, losses or theft of data could occur, our failure to generate sufficient cash as our debt becomes duereputation and future sales could be harmed, governmental regulatory action or to renew credit lines prior to their expirationprivate or governmental litigation could materially adversely affectbe commenced against us and our business, and our financial condition, operating results and cash flows.
Our estimates and judgments related to critical accounting policies could be inaccurate.
We consider accounting policies related to revenue recognition, marketable securities, valuation of goodwill intangible assets and other acquisition accounting items, and share-based compensation to be critical in fully understanding and evaluating our financial results. Management makes accounting judgments and estimates related to these policies. These estimates and judgments affect, among other things, the reported amounts of our assets, liabilities, revenue and expenses, the amounts of charges accrued by us, and related disclosure of contingent assets and liabilities. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances and at the time they are made. If our estimates or the assumptions underlying them are not correct, actual results may differ materially from our estimates and we may need to, among other things, accrue additional charges that could adversely impact our business. As a result, our operating results and financial conditionflows could be materially and adversely impacted in future periods and could negatively affect our stock price.affected.
Our disclosure controls and procedures and internal control over financial reporting may not be effective.
Our disclosure controls and procedures and internal control over financial reporting may not prevent all material errors and intentional misrepresentations. Any system of internal control can only provide reasonable assurance that all control objectives are met. Some of the potential risks involved could include, but are not limited to, management judgments, simple errors or mistakes and willful misconduct regarding controls or misinterpretation. Under Section 404 of the Sarbanes-Oxley Act, weWe are required to evaluatecomply with laws, rules, industry standards, and determineregulations that require us to maintain the security of personal information. We may also have contractual and other legal obligations to notify relevant stakeholders of security incidents. Such notifications are costly, could lead to negative publicity, may cause our customers to lose confidence in the effectiveness of our internal control over financial reporting. Compliance with this provision requires management's attentionsecurity measures and expense. Management's assessmentnot use our services, and require us to expend significant capital and other resources to respond to and/or alleviate problems caused by the actual, alleged or perceived security incident.
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Our ability to quickly and successfully recover from a disaster, public health crisis (including a global pandemic such as the COVID-19 pandemic), or other business continuity event could affect our ability to deliver our products and negatively impact our business reputation.
The occurrence of a natural disaster, public health crisis (including a global pandemic such as the COVID-19 pandemic) or an act of terrorism, or a decision or need to close any of our internal control over financial reporting mayfacilities without adequate notice or may not identify weaknesses that needtime for making alternative arrangements could result in interruptions in the delivery of our products and services. Our central business functions, including administration, human resources, finance services, legal, development, manufacturing and customer support depend on the proper functioning of our computer, telecommunication and other technology systems and operations, some of which are operated or hosted by third parties.
While we have business continuity programs in place, a disruption or failure of these systems or operations because of a disaster, public health crisis (including a global pandemic such as the COVID-19 pandemic) or other business continuity event could cause data to be addressed inlost or otherwise delay our internal control system. Ifability to complete sales and provide the highest level of service to our customers. In addition, we are unable to conclude that our internal control overcould have difficulty producing accurate financial reporting is effective, investors could lose confidence in our reported financial informationstatements on a timely basis, which could have an adverseimpact on our ability to make timely disclosures and could adversely affect the trading value of our stock. Although we endeavor to ensure there is redundancy in these systems and that they are regularly backed-up, there are no assurances that data recovery in the event of a disaster would be effective or occur in an efficient manner. Our operations are dependent upon our ability to protect our technology infrastructure against damage from business continuity events that could have a significant disruptive effect on the market priceour operations. We could experience material adverse interruptions to our operations or delivery of services to our stock or impact our borrowing ability. In addition, changesclients in operating conditions and changes in compliance with policies and procedures currently in place may result in inadequate disclosure controls and procedures and internal control over financial reporting in the future.a disaster recovery scenario.
If our products contain errors or quality issues, such issues may be costly to correct, revenue may be delayed, we could be sued, and our reputation could be harmed.
Our products are inherently complex, and, despite our quality assurance processes and testing by our customers and us, errors or quality issues may be found in our products after commencement of commercial shipments, especially when products are first introduced or when new versions are released. These errors may result from components supplied by third parties incorporated into our products, which makes us dependent upon the cooperation and expertise of such third parties for the diagnosis and correction of such errors. If errors are discovered, we may not be able to correct them in a timely manner or at all. In addition, we may need to make significant expenditures to eliminate errors and failures. Errors and failures in our products could result in loss of or delay in market acceptance of our products and could damage our reputation. Regardless of the source of these defects or errors, we may need to divert the attention of our engineering personnel from our product development efforts to address the detection and correction of these errors and defects. If one or more of our products fail, a customer may assert warranty and other contractual


claims for substantial damages against us. Our contracts with customers contain provisions relating to warranty disclaimers and liability limitations, which may not be upheld. Defending a lawsuit, regardless of its merit, is costly and may divert management's attention and harm the market's perception of us and our products. In addition, if our business liability insurance coverage proves inadequate or future coverage is unavailable on acceptable terms or at all, our business, operating results, and financial condition could be adversely impacted.
The occurrence or discovery of these types of errors or failures could have a material and adverse impact on our business, operating results, and financial condition. Any such errors, defects, or security vulnerabilities could also adversely affect the market's perception of our products and business.
If we fail to introduce new products and solutions or enhance our existing products and solutions to keep up with rapid technological change, demand for our products and solutions may decline.
The market for application and network performance management, service assurance, and cybersecurity solutions, and business intelligence is highly competitive and characterized by rapid changes in technology, evolving industry standards, changes in customer requirements, a current high level of and increasing competition, and frequent product introductions and enhancements. Our success is dependent upon our ability to meet our customers' needs, which are driven by changes in computer networking technologies, new application technologies, new security risks and the emergence of new industry standards. In addition, new technologies may shorten the life cycle for our products and solutions or could render our existing or planned products and services less competitive or obsolete. We must address demand from our customers for advancements in our products and services applications in order to support our customers' growing needs and requirements. In order toTo meet this challenge and remain competitive in the market, we must introduce new enhancements and additional form factors to our existing product lines and service offerings. If we are unable to develop, introduce and communicate new network and application performance managementand service assurance products, network security products, business intelligence products, and solutions or enhancements to existing
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products , in a timely and successful manner, this inability could have a material and adverse impact on our business, operating results and financial condition.
As our success depends in part on our ability to develop product enhancements and new products and solutions that keep pace with continuing changes in technology, cyber risk and customer preferences, we must devote significant resources to research and development, development and introduction of new products and enhancements on a timely basis, and obtaining market acceptance for our existing products and new products. We have introduced and intend to continue to introduce new products and solutions, including movingincreased migration to higher software content in our"software as a service" and software-deployed products as well as cybersecurity products. If the introduction of these products and solutions is significantly delayed or if we are unsuccessful in bringing these products and solutions to market, our business, operating results, and financial condition could be materially and adversely impacted. We are currently developing and are already deploying a number of new products as well as enhancements to our existing products and offerings, including software only solutions and products available in multiple form factors.
In addition, weWe must invest in research and development in order to remain competitive in our industry. However, there can be no assurances that continued investment and higher costs ofincreased research and development expenses will ultimately result in usour maintaining or increasing our market share, which could result in a decline toin our operating results. The process of developing new solutions is complex and uncertain; we must commit significant resources to developing new services or features without knowing whether our investments will result in services or features the market will accept. If our research and development expenses increase without a corresponding increase in our revenues, it could have a material adverse effect on our operating results. Also, we may not be able to successfully complete the development and market introduction of new products or product enhancements in a timely manner. If we fail to develop and deploy new products and product enhancements on a timely basis, or if we fail to gain market acceptance of our new products, our revenues will likely decline, and we may lose market share to our competitors.
The move to software focused products requires higher unit sales
To capture higher sales margins and reduce the environmental impacts of our products, we are moving to increase our software offerings. While software products have a higher overall sales margin than that of bundled hardware and software products, the per unit revenue for software only sales is lower than for sales that include software/hardware bundles. Therefore, in order to increase overall revenue, we will need to sell more units of software only products to meet and/or exceed the revenues generated by software/hardware bundled products.
We face significant competition from other technology companies.
The service assurance, application performance management and network security markets are highly competitive, rapidly evolving, and fragmented markets that have overlapping technologies and competitors, both large and small, and we


expect the competition on offerings and pricing to increase. We believe customers make service management system and network security purchasing decisions based primarily upon the following factors:
product and service performance, functionality and price;
timeliness of new product and service introductions;
network capacity;
ease of installation, integration, and use;
customer service and technical support;
name and reputation of vendor;
quality and value of the product and services; and
alliances with industry partners.
We compete with a growing number of providers of service assurance, application performance management solutions, network security offerings and portable network traffic analyzers and probes. In addition, leading network equipment, network security and service assurance and application technology vendors offer their own management solutions, including products which they license from other competitors. Some of our current and potential competitors have greater name recognition and substantially greater financial, management, marketing, service, support, technical, distribution and other resources than we do. In addition, some of our customers develop their own in-house solutions to meet their technological needs. Further, in recent years some of our competitors have been acquired by larger companies that are seeking to enter or expand in the markets in which we operate. We expect this trend to continue as companies attempt to strengthen or maintain their market positions in an evolving industry. Therefore, given their larger size and greater resources, our competitors may be able to respond more effectively than we can to new or changing opportunities, technologies, standards and customer requirements.
As a result of the competitive factors highlighted in this section and in other risk factors, we may not be able to compete effectively with our current or future competitors. If we are unable to anticipate or react to these competitive challenges or if existing or new competitors gain market share in any of our markets, our competitive position could weaken and we could experience a decline in our sales that could adversely affect our business and operating results. This competition could result in increased pricing pressure, reduced profit margins, increased sales and marketing expenses, and failure to increase, or the loss of market share, any of which would likely have a material and adverse impact on our business, operating results and financial condition.
Increased customer demands on our technical support services may adversely affect our relationships with our customers and our financial results.
We offer technical support services with many of our products. We may be unable to respond quickly enough to accommodate short-term increases in customer demand for support services. We also may be unable to modify the format of our support services to compete with changes in support services provided by competitors. Our customers depend on our support organization to resolve any issues relating to our products deployed on their networks. A high level of support is critical for continued relationships with our customers. If we or our channel partners do not effectively assist our customers in deploying our products, succeed in helping our customers quickly resolve post-deployment issues, and provide effective ongoing support, it would adversely affect our ability to sell our products to existing customers and would harm our reputation with potential customers. In addition, as we continue to expand our operations internationally, our support organization will face additional challenges, including those associated with delivering support, training and documentation in languages other than English. Any failure to maintain high quality support and services would harm our operating results and reputation. Further customer demand for these services, without corresponding revenues, could have a material and adverse impact on our financial condition and results of operations.
Failure to manage growth properly and to implement enhanced automated systems could adversely impact our business.
The growth in size and complexity of our business and our customer base has been and will continue to be a challenge to our management and operations. Additional growth will place significant demands on our management, infrastructure, and other resources. To manage further growth effectively, we must hire, integrate, and retain highly skilled personnel qualified to manage our expanded operations. We will also need to continue to improve our financial and management controls, reporting systems, and procedures. If we are unable to manage our growth effectively, our costs, the quality of our products, the effectiveness of our sales organization, attraction and retention of key personnel, our business, our operating results and financial condition could be materially and adversely impacted. To manage our growth effectively, we may need to implement new or enhanced automated infrastructure technology and systems.


Any disruptions or ineffectiveness relating to our systems implementations and enhancements could adversely affect our ability to process customer orders, ship products, provide services and support to our customers, bill and track our customers, fulfill contractual obligations, and otherwise run our business.
As a result of the diversification of our business, personnel growth, acquisitions and international expansion in recent years, most of our employees are now based outside of our headquarters. If we are unable to appropriately increase management depth and enhance succession planning, we may not be able to achieve our financial or operational goals. It is also important to our continued success that we hire qualified employees, properly train them and manage out poorly performing personnel, all while maintaining our corporate culture and spirit of innovation. If we are not successful at these efforts, our growth and operations could be adversely affected.
As our business evolves, we must also expand and adapt our information technology (IT) and operational infrastructure. Our business relies on our data systems, billing systems and other operational and financial reporting and control systems. All of these systems have become increasingly complex due to the diversification and complexity of our business, acquisitions of new businesses with different systems and increased regulation over controls and procedures. To manage our technical support infrastructure effectively and improve our sales efficiency, we will need to continue to upgrade and improve our data systems, billing systems, ordering processes, customer relationship management systems, and other operational and financial systems, procedures and controls. These upgrades and improvements may be difficult and costly. If we are unable to adapt our systems and organization in a timely, efficient and cost-effective manner to accommodate changing circumstances, our business may be adversely affected. If the third parties we rely on for hosted data solutions for our internal network and information systems are subject to a security breach or otherwise suffer disruptions that impact the services we utilize, the integrity and availability of our internal information could be compromised causing the loss of confidential or proprietary information, damage to our reputation and economic loss.
We may not successfully complete acquisitions or integrate acquisitions we do make, which could impair our ability to compete and could harm our operating results.
We may need to acquire complementary businesses, products or technologies to remain competitive or expand our business. We actively investigate and evaluate potential acquisitions of complementary businesses, products and technologies in the ordinary course of business. We may compete for acquisition opportunities with entities having significantly greater resources than we have. As a result, we may not succeed in acquiring some or all businesses, products or technologies that we seek to acquire. Our inability to effectively consummate acquisitions on favorable terms could significantly impact our ability to compete effectively in our targeted markets and could negatively affect our results of operations.
Acquisitions that we do complete could adversely impact our business. The potential adverse consequences from acquisitions include:
the potentially dilutive issuance of common stock or other equity instruments;
the incurrence of debt and amortization expenses related to acquired intangible assets;
the potentially costly and disruptive impact of assuming unfavorable pre-existing contractual relationships of acquired companies that we would not have otherwise entered into and potentially exiting or modifying such relationships;
the potential litigation or other claims in connection with, or inheritance of claims or litigation risk as a result of, an acquisition including claims from terminated employees, customers, third parties or enforcement actions by various regulators;
the incurrence of significant costs and expenses; and
the potentially negative impact of poor performance of an acquisition on our earnings per share.
Acquisition transactions also involve numerous business risks. These risks from acquisitions include:
difficulties in assimilating the acquired operations, technologies, personnel and products;
difficulties in managing geographically dispersed operations;
difficulties in assimilating diverse financial reporting and management information systems;
difficulties in maintaining uniform standards, controls, procedures and policies;
the diversion of management's attention from other business concerns;
use of cash to pay for acquisitions that may limit other potential uses of our cash, including stock repurchases and retirement of outstanding indebtedness;
substantial accounting charges for restructuring and related expenses, write-off of in-process research and development, impairment of goodwill, amortization or impairment of intangible assets and share-based compensation expense;


the potential disruption of our business;
the potential loss of key employees, customers, distributors or suppliers;
the inability to generate sufficient revenue to offset acquisition or investment costs; and
the potential for delays in customer purchases due to uncertainty and the inability to maintain relationships with customers of the acquired businesses.
If we are not able to successfully manage these issues, the anticipated benefits and efficiencies of the acquisitions may not be realized fully or at all, or may take longer to realize than expected, and our ability to compete, our revenue and gross margins and our results of operations may be adversely affected.
Our ability to quickly and successfully recover from a disaster or other business continuity event could affect our ability to deliver our products and cause reputational harm to our business.
The occurrence of a natural disaster or an act of terrorism, or a decision or need to close any of our facilities without adequate notice or time for making alternative arrangements could result in interruptions in the delivery of our products and services. Our central business functions, including administration, human resources, finance services, development, manufacturing and customer support depend on the proper functioning of our computer, telecommunication and other technology systems and operations. some of which are operated or hosted by third parties.
A disruption or failure of these systems or operations because of a disaster or other business continuity event could cause data to be lost or otherwise delay our ability to complete sales and provide the highest level of service to our customers. In addition, we could have difficulty producing accurate financial statements on a timely basis, which could adversely affect the trading value of our stock. Although we endeavor to ensure there is redundancy in these systems and that they are regularly backed-up, there are no assurances that data recovery in the event of a disaster would be effective or occur in an efficient manner. Our operations are dependent upon our ability to protect our technology infrastructure against damage from business continuity events that could have a significant disruptive effect on our operations. We could experience material adverse interruptions to our operations or delivery of services to our clients in a disaster recovery scenario.
Vulnerabilities and critical security defects, prioritization decisions regarding remedying vulnerabilities or security defects, failure of third party providers to remedy vulnerabilities or security defects, or customers not deploying security releases or deciding not to upgrade products, services or solutions could result in claims of liability against us, damage our reputation or otherwise harm our business.
The products and services we sell to customers, and our cloud-based solutions, may contain vulnerabilities or critical security defects which have not been remedied and cannot be disclosed without compromising security. We may also make prioritization decisions in determining which vulnerabilities or security defects to fix, and the timing of these fixes, which could result in an exploit which compromises security.
Customers also need to test security releases before they can be deployed which can delay implementation. In addition, we rely on third-party providers of software and cloud-based service and we cannot control the rate at which they remedy vulnerabilities. Customers may also not deploy a security release, or decide not to upgrade to the latest versions of our products, services or cloud-based solutions containing the release, leaving them vulnerable.
Vulnerabilities and critical security defects, prioritization errors in remedying vulnerabilities or security defects, failure of third-party providers to remedy vulnerabilities or security defects, or customers not deploying security releases or deciding not to upgrade products, services or solutions could result in claims of liability against us, damage our reputation or otherwise harm our business.
Cyberattacks, data breaches, malware or terrorism may disrupt our operations, harm our operating results and financial condition, and damage our reputation, and cyberattacks or data breaches on our customers’ networks, or in cloud-based services provided by or enabled by us, could result in claims of liability against us, damage our reputation, or otherwise harm our business.
Despite our implementation of network and product security measures, the products and services we sell to customers, and our servers, data centers and the cloud-based solutions on which our data, and data of our customers, suppliers and business partners are stored, are vulnerable to cyber-attacks, data breaches, malware, and similar disruptions from unauthorized tampering or human error. Any such event could compromise our networks or those of our customers, suppliers, or partners, and the information stored on our networks or those of our customers, suppliers, or partners could be accessed, publicly disclosed, lost or stolen, which could subject us to liability to our customers, suppliers, business partners and others, and could


have a material adverse effect on our business, operating results, and financial condition and may cause damage to our reputation.
Efforts to limit the ability of malicious third parties to disrupt the operations of the Internet or undermine our own security efforts may be costly to implement, and may not be entirely successful.  Cybersecurity breaches in our customers’ networks (or those of our suppliers or partners), or in cloud-based services provided by or enabled by us, regardless of whether the breach is attributable to a vulnerability in our products or services, could result in claims of liability against us, damage our reputation or otherwise harm our business.
Our reliance on sole source suppliers could adversely impact our business.
Specific components that are necessary for the hardware assembly of our instruments are obtained from separate sole source suppliers or a limited group of suppliers. These components include our network interface cards and proprietary hardware. Our reliance on sole or limited suppliers involves several risks, including a lack of control over the manufacturing process, inventory management and potential inability to obtain an adequate supply of required components and the inability to exercise control over pricing, quality and timely delivery of components. For most of our products, we do not have the internal manufacturing capabilities to meet our customers' demands. It is our practice to mitigate these risks by partnering with key suppliers, including distributors, to establish a variety of supply continuity practices. These practices may include, among other approaches, establishing buffer supply requiring suppliers to maintain adequate stocks of materials, bonding agreements with distributors, and use-based and kanban programs to set supply thresholds. We also enter into escrow arrangements for certain technologies. Where possible, we use widely-available off the shelf hardware and work with large suppliers with multiple factories and other risk management practices. However, failure of supply or failure to execute effectively on any of these programs could result in our inability to obtain adequate deliveries or the occurrence of any other circumstance that would require us to seek alternative sources of these components would impact our ability to ship our products on a timely basis. Moreover, if we are unable to continue to acquire from these suppliers on acceptable terms, or should any of these suppliers cease to supply us with components for any reason, we may not be able to identify and integrate an alternative source of supply in a timely fashion or at the same costs. Any transition to one or more alternate manufacturers would likely result in delays, operational problems and increased costs, and may limit our ability to deliver our products to our customers on time for such transition period. These risks could damage relationships with our current and prospective customers, cause shortfalls in expected revenue, and could materially and adversely impact our business, operating results and financial condition.
If we violate the U.S. Foreign Corrupt Practices Act or applicable anti-bribery laws in other countries, or if we fail to comply with U.S. export controls and government contracting laws, our business could be harmed.
We earn a significant portion of our total revenues from international sales. As a result, we must comply with complex foreign and U.S. laws and regulations, such as the U.S. Foreign Corrupt Practices Act, the U.K. Bribery Act and other local laws prohibiting corrupt payments to government officials and others, as well as anti-competition regulations.
The U.S. Foreign Corrupt Practices Act (FCPA), which continues to see increased enforcement in recent years, generally prohibits U.S. companies and their intermediaries from making corrupt payments to foreign officials for the purpose of obtaining or keeping business or otherwise obtaining favorable treatment and requires companies to maintain appropriate record-keeping and internal accounting practices to accurately reflect the transactions of the company. Under the FCPA, U.S. companies may be held liable for actions taken by agents or local partners or representatives. In addition, regulators may seek to hold us liable for successor liability FCPA violations committed by companies which we acquire. We are also subject to the U.K. Bribery Act and may be subject to certain anti-corruption laws of other countries in which we do business.
In addition to anti-bribery and anti-corruption laws, we are also subject to the export and re-export control laws of the U.S., including the U.S. Export Administration Regulations (EAR) and to U.S. government contracting laws, rules and regulations, and may be subject to government contracting laws of other countries in which we do business. If we or our distributors, resellers, agents, or other intermediaries fail to comply with the FCPA, the EAR or U.S. government contracting laws, or the anti-corruption, export or governmental contracting laws of other countries, governmental authorities in the U.S. or other countries could seek to impose civil and/or criminal penalties, which could have a material adverse effect on our business, results of operations, financial conditions and cash flows.
Violations of these laws and regulations could result in fines and penalties, criminal sanctions, restrictions on our business conduct and on our ability to offer our products and services in one or more countries. Such violations could also adversely affect our reputation with existing and prospective clients, which could negatively impact our operating results and growth prospects.


The failure to recruit and retain qualified personnel and plan for and manage the succession of key executives could hinder our ability to successfully manage our business, which could have a material adverse effect on our financial position and operating results.
We operate in businesses where there is intense competition for experienced personnel in all of our global markets and have, in some instances, experienced attrition of our employees to direct and indirect competitors. We depend on our ability to identify, recruit, hire, train, develop and retain qualified and effective professionals and to attract and retain talent needed to execute our business strategy. Our future success depends in large part upon our ability to attract, train, motivate and retain highly skilled employees, particularly executives, sales and marketing personnel, software engineers, and technical support personnel. The complexity of our products, processing functionality, software systems and services requires highly trained professionals. While we presently have a sophisticated, dedicated and experienced team of employees who have a deep understanding of our business lines, the labor market for these individuals has historically been very competitive due to the limited number of people available with the necessary technical skills and understanding. If we are unable to attract and retain the highly skilled technical personnel that are integral to our sales, marketing, product development and technical support teams, the rate at which we can generate sales and develop new products or product enhancements may be limited. This inability could have a material and adverse impact on our business, operating results and financial condition.
In addition, we must maintain and periodically increase the size of our sales force in order to increase our direct sales and support our indirect sales channels. Because our products are very technical, sales people require a comparatively long period of time to become productive, typically three to twelve months. This lag in productivity, as well as the challenge of attracting qualified candidates, may make it difficult to meet our sales force growth targets. Further, we may not generate sufficient sales to offset the increased expense resulting from growing our sales force. If we are unable to maintain and periodically expand our sales capability, our business, operating results and financial condition could be materially and adversely impacted.
Loss of key personnel could adversely impact our business. Our future success depends to a significant degree on the skills, experience and efforts of Anil Singhal, our President, Chief Executive Officer, and co-founder, and our other key executive officers and senior managers to work effectively as a team. Effective succession planning is also important for our long-term success. Failure to ensure effective transfers of knowledge and smooth transitions involving key employees could hinder our strategic planning and execution. The loss of one or more of our key personnel could have a material and adverse impact on our business, operating results and financial condition. We must, therefore, plan for and manage the succession of key executives due to retirement, illness or competitive offers elsewhere.
We assumed certain non-U.S. pension benefit obligations associated with the business acquired in the Comms Transaction. Future funding obligations related to these liabilities could restrict cash available for our operations, capital expenditures or other requirements, or require us to borrow additional funds.
As part of the Comms Transaction, we assumed certain unfunded non-U.S. pension obligations related to non-U.S. employees of the Communications Business. While we intend to comply with any future funding obligations for our non-U.S. pension benefit plans through the use of cash from operations, there can be no assurance that we will generate enough cash to do so and also meet our other required or intended cash uses. Our inability to fund these obligations through cash from operations could require us to seek funding from other sources, including through additional borrowings, which could materially increase our outstanding debt or debt service requirements.
Our success depends, in part, on our ability to manage and leverage our distribution channels. Disruptions to, or our failure to effectively develop and manage, these partners and the processes and procedures that support them could adversely affect our ability to generate revenues from the sale of our products and services. Managing these distribution channels and relationships requires experienced personnel, and lack of sufficient expertise could lead to the decrease of the sales of our products and services and our operating results could suffer.
To increase our sales we need to continue to enhance our indirect sales efforts, to continue to manage and expand these existing distribution channels and to develop new indirect distribution channels. Our channel partners have no obligation to purchase any products from us. Some of our distribution and channel partners sell competitive products and services and the loss of, or reduction in sales by, these partners could materially reduce our revenues. In addition, they could internally develop products that compete with our solutions or partner with our competitors or bundle or resell competitors' solutions, possibly at lower prices. The potential inability to develop relationships with new partners in new markets, expand and manage our existing partner relationships, the unwillingness of our partners to market and sell our products effectively or the loss of existing partnerships could have a material and adverse impact on our business, operating results and financial condition. Our international operations, including our operations in the United Kingdom, mainland Europe, India, Asia-Pacific and other regions, are generally also subject to the risk of longer sales cycles through our international distribution channels. Sales to


customers outside the United States accounted for 39%, 41%, and 38% of our total revenue for the fiscal years ended March 31, 2019, 2018 and 2017, respectively.
Our future success will likely require us to maintain and increase the number and depth of our relationships with distributors and channel partners and to leverage those relationships to expand our distribution channels and increase revenue. The need to develop such relationships can be particularly acute in areas outside of the U.S. Recruiting and retaining qualified channel partners and training them in the use of our technology and services and ensuring that they comply with our legal and ethical expectations requires significant time and resources.
Our failure to maintain and increase the number and quality of relationships with channel partners, and any inability to successfully execute on the partnerships we initiate, could significantly impede our revenue growth prospects in the short and long term.
Our success depends, in part, on our ability to manage our international research and development operations and related partnerships. Our international research and development efforts may achieve delayed or lower than expected benefits and involve competitive and other risks.
We must continue to enhance our existing products and introduce new products in order to keep up with rapid technological change. Our international research and development teams play a critical role in these efforts. We must attract, train, motivate and retain our international research and development team members. To maintain this stable international employee research and development talent, we believe we must provide our international engineers with compelling and strategically significant work, coupled with technical and architectural ownership of their respective development projects. We must develop the leaders of these international teams, while ensuring their frequent inclusion and participation in corporate strategic and operational planning. We are likely to recognize the costs associated with these investments earlier than some of the anticipated benefits, and the return on these investments may be lower, or may develop more slowly, than we expect. These development efforts also involve risks, including, knowledge transfer issues related to our technology and resulting exposure to misappropriation of intellectual property or information that is proprietary to us, heightened exposure to economic, security and political conditions abroad, and exchange rate and tax compliance issues. The risks related to our research and development efforts abroad could increase our expenses, impair our development efforts, harm our competitive position, and/orand damage our reputation. If we do not achieve the benefits anticipated from these investments, or if the achievement of these benefits is delayed, our operating results may be adversely affected.
Necessary licenses for third-party technology may not be available to us on commercially reasonable terms or may be very expensive.at all.
We currently and will in the future license technology from third parties that we use to produce or embed in our products. While we have generally been able to license required third-party technology to date, third-party licenses required in the future may not be available to us on commercially reasonable terms or at all. Third parties who hold exclusive rights to technology that we seek to license may include our competitors. If we are unable to obtain any necessary third-party licenses, we would be required to redesign our product or obtain substitute technology, which may not perform as well, be of lower quality or be more costly. The loss of these licenses or the inability to maintain any of them on commercially acceptable terms could delay development of future products or the enhancement of existing products. We may also choose to pay a premium price for such a license in certain circumstances where continuity of the licensed product would outweigh the premium cost of the license. The unavailability of these licenses or the necessity of agreeing to commercially unreasonable terms for such licenses could materially adversely affect our business, financial condition, operating results, and cash flows.
Increased customer demands on our technical support services may adversely affect our relationships with our customers and our financial results.
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We offer technical support services with many of our products. We may be unable to respond quickly enough to accommodate short-term increases in customer demand for support services. We also may be unable to modify the format of our support services to compete with changes in support services provided by competitors. Our customers depend on our support organization to resolve issues relating to our products deployed on their networks. A high level of support is critical for continued relationships with our customers. If we or our channel partners do not effectively assist our customers in deploying our products, succeed in helping our customers quickly resolve post-deployment issues, and provide effective ongoing support, it would adversely affect our ability to sell our products to existing customers and would harm our reputation with existing and potential customers. Any failure to maintain high quality support and services would harm our operating results and reputation. Further, if customers demand these services, and we cannot adequately meet their demand, or if we cannot realize revenues in connection with our provision of services related to product support, it could have a material and adverse impact on our financial condition and results of operations.
The success of our business depends, in part, on the continued growth in the market for and the continued commercial demand for service delivery, service assurance and network security solutions focused on the performance monitoring and management of applications and networks.
We derive nearly all our revenue from the sale of products and services that are designed to allow our customers to assure the delivery of services through management of the performance and network security of applications across IP networks. We have actively expanded our operations in the past through acquisitions and organic growth and may continue to expand them in the future to gain share in the evolving market in which we operate. Therefore, we must be able to predict the appropriate features and prices for future products to address the market, the optimal distribution strategy, and the future changes to the competitive environment. For us to be successful, our potential customers must recognize the value of more sophisticated application management and network security solutions, decide to invest in the management of their networked applications and, in particular, adopt our management solutions. Any failure of this market to continue to be viable would materially and adversely impact our business, operating results, and financial condition. Additionally, businesses may choose to outsource the operations and management of their networks to managed service providers. Our business may depend on our ability to continue to develop relationships with these service providers and successfully market our products to them.
Failure to manage growth properly and to implement enhanced automated systems could adversely impact our business.
The growth in size and complexity of our business and our customer base has been and will continue to be a challenge to our management and operations. Additional growth will place significant demands on our management, infrastructure, and other resources. To manage further growth effectively, we must hire, integrate, and retain highly skilled personnel qualified to manage our expanded operations. We will also need to continue to improve our financial and management controls, reporting systems, and procedures. If we are unable to manage our growth effectively, our costs, the quality of our products, the effectiveness of our sales organization, attraction and retention of key personnel, our business, our operating results and financial condition could be materially and adversely impacted. To manage our growth effectively, we may need to implement new or enhanced automated infrastructure technology and systems.
Any disruptions or ineffectiveness relating to our systems implementations and enhancements could adversely affect our ability to process customer orders, ship products, provide services and support to our customers, bill and track our customers, fulfill contractual obligations, and otherwise run our business.
As a result of the diversification of our business, personnel growth, acquisitions, and international expansion in recent years, most of our employees are based outside of our headquarters. If we are unable to appropriately increase management depth and enhance succession planning, we may not be able to achieve our financial or operational goals. It is also important to our continued success that we hire qualified employees, properly train them and manage out poorly performing personnel, all while maintaining our corporate culture and spirit of innovation. If we are not successful at these efforts, our growth and operations could be adversely affected.
As our business evolves, we must also expand and adapt our information technology (IT) and operational infrastructure. Our business relies on our data systems, billing systems and other operational and financial reporting and control systems. All these systems have become increasingly complex due to the diversification and complexity of our business and acquisitions of new businesses with different systems. To manage our technical support infrastructure effectively and improve our sales efficiency, we will need to continue to upgrade and improve our data systems, billing systems, ordering processes, customer relationship management systems, and other operational and financial systems, procedures and controls. These upgrades and improvements may be difficult and costly, and they may require employees to dedicate a significant amount of time to implement. If we are unable to adapt our systems and organization in a timely, efficient, and cost-effective manner to
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accommodate changing circumstances, our business may be adversely affected. If the third parties we rely on for hosted data solutions for our internal network and information systems are subject to a security breach or otherwise suffer disruptions that impact the services we utilize, the integrity and availability of our internal information could be compromised causing the loss of confidential or proprietary information, damage to our reputation and economic loss.
Our growth could suffer if the markets into which we sell our products and services experience cyclicality.
Our growth will depend in part on the growth of the markets which we serve. We serve certain industries that have historically been cyclical and have experienced periodic downturns that have had a material adverse impact on demand for the products, software, and services that we offer. Any of these factors could adversely affect the business, financial condition, and results of operations of the company in any given period.
Our reliance on sole source suppliers could adversely impact our business.
Specific components that are necessary for the hardware assembly of our instruments are obtained from separate sole source suppliers or a limited group of suppliers. These components include our network interface cards and proprietary hardware. Our reliance on sole or limited suppliers involves several risks, including a lack of control over the manufacturing process and inventory management and potential inability to obtain an adequate supply of required components and the inability to exercise control over pricing, quality and timely delivery of components. For most of our products, we do not have the internal manufacturing capabilities to meet our customers' demands. It is our practice to mitigate these risks by partnering with key suppliers, including distributors, to establish a variety of supply continuity practices. These practices may include, among other approaches, establishing buffer supply requiring suppliers to maintain adequate stocks of materials, bonding agreements with distributors, and use-based and kanban programs to set supply thresholds. We also enter into escrow arrangements for certain technologies. Where possible, we use widely available off the shelf hardware and work with large suppliers with multiple factories and other risk management practices. However, failure of supply or failure to execute effectively on any of these programs, including as a result of a public health crisis (included a global pandemic such as the COVID-19 pandemic) could result in our inability to obtain adequate deliveries or the occurrence of any other circumstance that would require us to seek alternative sources of supply for these components would impact our ability to ship our products on a timely basis. Moreover, if we are unable to continue to acquire from these suppliers on acceptable terms, or should any of these suppliers cease to supply us with components for any reason, we may not be able to identify and integrate an alternative source of supply in a timely fashion or at the same costs. Any transition to one or more alternate manufacturers would likely result in delays, operational problems, and increased costs, and may limit our ability to deliver our products to our customers on time for such transition period. These risks could damage relationships with our current and prospective customers, cause shortfalls in expected revenue, and could materially and adversely impact our business, operating results and financial condition.
We or our suppliers may be affected by new regulations related to climate change and other environmental issues.
We or our suppliers may become subject to new laws enacted with regards to climate change and other environmental issues. If new laws are enacted, or current laws are modified in countries in which we or our suppliers operate, we could face increased costs to comply with these laws. These costs may be incurred across various levels of our supply chain to comply with new environmental regulations, as well as by us in connection with our manufacturing of products, including costs related to incorporation of substitute materials and other product re-design costs, as well as costs associated with product recalls. In addition, we may be unable to service existing products if certain materials are no longer compliant with new regulations, which could cause us to incur increased costs to satisfy service obligations to customers. Additionally, our flow of product may be impacted which could delay the recognition of revenue and have a materially adverse effect on our business.
Our success depends, in part, on our ability to manage and leverage our distribution channels. Disruptions to, or our failure to effectively develop and manage, these partners and the processes and procedures that support them could adversely affect our ability to generate revenues from the sale of our products and services. Managing these distribution channels and relationships requires experienced personnel, and lack of sufficient expertise could lead to a decrease in sales of our products and services, which could cause our operating results to suffer.
Our future success may require us to increase the number and use of our indirect sales efforts through our distributors and channel partners and to leverage those relationships to expand these our distribution channels and to develop new indirect distribution channels to increase revenue. Our channel partners have no obligation to purchase any products from us. Some of our distribution and channel partners also distribute and sell competitive products and services and the reduction in sales by these partners could materially reduce our revenues. In addition, they could internally develop products that compete with our solutions or partner with our competitors and bundle or resell competitors' solutions, possibly at lower prices. The potential
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inability to develop relationships with new partners in new markets, expand and manage our existing partner relationships, the unwillingness of our partners to market and sell our products effectively or the loss of existing partnerships could have a material and adverse impact on our business, operating results and financial condition. Our international operations, including our operations in the United Kingdom, mainland Europe, India, Asia-Pacific and other regions, are generally also subject to the risk of longer sales cycles through our international distribution channels. Sales to customers outside the United States accounted for 42%, 39%, and 39% of our total revenue for the fiscal years ended March 31, 2021, 2020 and 2019, respectively.
The need to develop such relationships can be particularly acute in areas outside of the U.S. Recruiting and retaining qualified channel partners and training them in the use of our technology and services and ensuring that they comply with our legal and ethical requirements requires significant time and resources throughout the relationship.

Risks Related to Our Intellectual Property
Our success depends on our ability to protect our intellectual property rights.
Our business is heavily dependent on our intellectual property. We rely upon a combination of patent, copyright, trademark and trade secret laws and registrations and non-disclosure and other contractual and license arrangements to protect our intellectual property rights. The reverse engineering, unauthorized copying, or other misappropriation of our intellectual property could enable third parties to benefit from our technology without compensating us. Furthermore, the laws of some foreign jurisdictions do not offer the same protections for our proprietary rights as the laws of the United States, and we may be subject to unauthorized use of our products in those countries. Legal proceedings to enforce our intellectual property rights could be burdensome and expensive and could involve a high degree of uncertainty. In addition, legal proceedings may divert management's attention from growing our business. There can be no assurance that the steps we have taken to protect our intellectual property rights will be adequate to deter misappropriation of proprietary information, or that we will be able to detect unauthorized use by third parties and take appropriate steps to enforce our intellectual property rights. The unauthorized copying or use of our products or proprietary information could result in reduced sales of our products and eventually harm our operating results.

Others may claim that we infringe on their intellectual property rights.
From time to time we have beenWe are and may continue to be subject to claims by others, whether valid or not, that our products infringe on their intellectual property rights, patents, copyrights, or trademarks. In some cases, we may have agreed to indemnify our customers and partners if our products or technology infringe or misappropriate specified third party intellectual property rights; therefore, we could become involved in litigation or claims brought against our customers or partners if our products or technology are the subject of such allegations. These claims, whether or not valid, could require us to spend significant sums in litigation, pay damages or royalties, delay product shipments, reengineer our products, rename our products and rebuild name recognition or acquire licenses to such third-party intellectual property. We may not be able to secure any required licenses on commercially reasonable terms or secure them at all. In some cases, we may have agreed to contract terms that indemnify our customers and partners if our products or technology infringe or misappropriate specified third party intellectual property rights; therefore, we could become involved in litigation or claims brought against our customers or partners if our products or technology are the subject of such allegations. Any of these claims or resulting events could have a material and adverse impact on our business, operating results, and financial condition.


Risks Related to Our Liquidity and Financial Condition
Our indebtedness may limit our operations and our use of our cash flow, and any failure to comply with the covenants that apply to our indebtedness could adversely affect our liquidity and financial condition.
On January 16, 2018, we amended and expanded our existing credit facility (Amended Credit Agreement) with a syndicate of lenders. The Amended Credit Agreement provides for a five-year $1.0 billion senior secured revolving credit facility, including a letter of credit sub-facility of up to $75.0 million. We have used the new credit facility for working capital purposes and to finance the repurchase of common stock under a previous accelerated stock repurchase plan. The commitments under the Amended Credit Agreement will expire on January 16, 2023, and any outstanding loans will be due on that date. As of the date of this report, we had approximately $350 million in outstanding indebtedness under the Amended Credit Agreement. Our debt level can have negative consequences, including exposing us to future interest rate risk. We may incur significantly more debt in the future, and there can be no assurance that our cost of funding will not substantially increase. Our current revolving credit facility also imposes certain restrictions on us; for a more detailed description please refer to "Management's Discussion and Analysis of Financial Condition and Results of Operations." Upon an event of default, for example, the administrative agent, with the consent of, or at the request of, the holders of more than 50% in principal amount of the loans and commitments, may terminate the commitments and accelerate the maturity of the loans outstanding under the
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Amended Credit Agreement and enforce certain other remedies under the Amended Credit Agreement and other loan documents, which would adversely affect our liquidity and financial condition. If we take on additional indebtedness, the risks described above could increase.
Interest on the outstanding balances under the Amended Credit Agreement is calculated based on the London Interbank Offered Rate (LIBOR). On July 27, 2017, the U.K. Financial Conduct Authority (FCA), which regulates LIBOR, announced that it will no longer require banks to submit rates for the calculation of LIBOR after 2021. Further, on March 5, 2021, the Intercontinental Exchange Benchmark Administration, the FCA-regulated and authorized administrator of LIBOR, announced, and the FCA confirmed, that one week and two-month USD LIBOR settings will cease on December 31, 2021, and that the USD LIBOR panel for all other tenors will cease on June 30, 2023. The Amended Credit Agreement, which matures on January 16, 2023, prior to the cessation of USD LIBOR publications on June 30, 2023, provides a mechanism pursuant to which we and the administrative agent may agree, under certain circumstances, to transition to an alternate base rate borrowing or amend the credit agreement to establish an alternate interest rate to LIBOR that includes consideration of the then-prevailing market convention for determining interest rates for syndicated loans in the United States at that time.
If the methods of calculating LIBOR change from current methods for any reason, or if LIBOR ceases to perform as it has historically, or if we select an alternative benchmark rate our interest expense associated with our outstanding indebtedness or any future indebtedness we incur may increase.
Any failure to meet our debt obligations could damage our business.
Our ability to meet our obligations under the Amended Credit Agreement will depend on market conditions and our future performance, which is subject to economic, financial, competitive, and other factors beyond our control. If we are unable to remain profitable, or if we use more cash than we generate in the future, our level of indebtedness at such time could adversely affect our operations by limiting or prohibiting our ability to obtain financing for additional capital expenditures, acquisitions and general corporate and other purposes. In addition, if we are unable to make payments as required under the Amended Credit Agreement, we would be in default under the terms of the loans, which could seriously harm our business. If we incur significantly more debt, this could intensify the risks described above.
We may fail to secure necessary additional financing.
Our future success may depend in part on our ability to obtain additional financing to support our continued growth and operations and any downgrades in our credit rating could affect our ability to obtain additional financing in the future or may affect the terms of any such financing. If our existing sources of liquidity are insufficient to satisfy our operating requirements, we may need to seek to raise capital by one or more of the following:
issuing additional common stock or other equity instruments;
acquiring additional bank debt;
issuing debt securities; or
obtaining lease financings.
However, we may not be able to obtain additional capital when we want or need it, or capital may not be available on satisfactory terms. Furthermore, any additional capital may have terms and conditions that adversely affect our business, such as new financial or operating covenants, or that may result in dilution to our stockholders.
We expect that existing cash, cash equivalents, marketable securities, cash provided from operations and our bank credit facilities will be sufficient to meet ongoing cash requirements. However, our failure to generate sufficient cash as our debt becomes due or to renew credit lines prior to their expiration could materially adversely affect our business, financial condition, operating results, and cash flows.
Other Risks Related to Our Business
The failure to recruit and retain qualified personnel and plan for and manage the succession of key executives could hinder our ability to successfully manage our business, which could have a material adverse effect on our financial position and operating results.
We operate in businesses where there is intense competition for experienced personnel in all our global markets and have, in some instances, experienced attrition of our employees to direct and indirect competitors. We depend on our ability to identify, recruit, hire, train, develop and retain qualified and effective professionals and to attract and retain talent needed to execute our business strategy. Our future success depends in large part upon our ability to attract, train, motivate and retain
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highly skilled employees, particularly executives, sales and marketing personnel, software engineers, and technical support personnel. The complexity of our products, processing functionality, software systems and services require highly trained professionals. While we presently have a sophisticated, dedicated and experienced team of employees who have a deep understanding of our business lines, the labor market for these individuals has historically been very competitive due to the limited number of people available with the necessary technical skills and understanding. If we are unable to attract and retain the highly skilled technical personnel that are integral to our sales, marketing, product development and technical support teams, the rate at which we can generate sales and develop new products or product enhancements may be limited. This inability could have a material and adverse impact on our business, operating results, and financial condition.
In addition, we must maintain and periodically increase the size of our sales force in order to increase our direct sales and support our indirect sales channels. Because our products are very technical, salespeople require a comparatively long period of time to become productive, typically three to twelve months. This lag in productivity, as well as the challenge of attracting qualified candidates, may make it difficult to meet our sales force growth targets. Further, we may not generate sufficient sales to offset the increased expense resulting from growing our sales force. If we are unable to maintain and periodically expand our sales capability, our business, operating results and financial condition could be materially and adversely impacted.
Loss of key personnel could adversely impact our business. Our future success depends to a significant degree on the skills, experience and efforts of Anil Singhal, our President, Chief Executive Officer, and co-founder, and our other key executive officers and senior managers to work effectively as a team. Effective succession planning is also important for our long-term success. Failure to ensure effective transfers of knowledge and smooth transitions involving key employees could hinder our strategic planning and execution. The loss of one or more of our key personnel could have a material and adverse impact on our business, operating results, and financial condition. We must, therefore, plan for and manage the succession of key executives due to retirement, illness, or competitive offers elsewhere.
We may not successfully complete acquisitions or integrate acquisitions we do make, which could impair our ability to compete and could harm our operating results.
We may need to acquire complementary businesses, products, or technologies to remain competitive or expand our business. We investigate and evaluate potential acquisitions of complementary businesses, products, and technologies in the ordinary course of business. We may compete for acquisition opportunities with entities having significantly greater resources than we have. As a result, we may not succeed in acquiring some or all businesses, products, or technologies that we seek to acquire. Our inability to effectively consummate acquisitions on favorable terms could significantly impact our ability to compete effectively in our targeted markets and could negatively affect our results of operations.
Acquisitions that we do complete could adversely impact our business. The potential adverse consequences from acquisitions include:
the potentially dilutive issuance of common stock or other equity instruments;
the incurrence of debt and amortization expenses related to acquired intangible assets;
the potential litigation or other claims in connection with, an acquisition;
the incurrence of significant costs and expenses to complete the acquisition and integrate the acquired business; and
the potentially negative impact of poor performance of an acquisition on our earnings per share.
Acquisition transactions also involve numerous business risks. These risks from acquisitions include:
difficulties in assimilating the acquired operations, technologies, personnel and products;
difficulties in assimilating diverse financial reporting and management information systems as well as differing ordering processes and customer relationship management systems;
use of cash to pay for acquisitions that may limit other potential uses of our cash, including stock repurchases and repayment of outstanding indebtedness;
substantial accounting charges for restructuring and related expenses, write-off of in-process research and development, impairment of goodwill, amortization or impairment of intangible assets and share-based compensation expense;
the potential loss of key employees, customers, distributors or suppliers; and
the inability to generate sufficient revenue to offset acquisition or investment costs.
If we are not able to successfully manage these issues, the anticipated benefits and efficiencies of the acquisitions may not be realized fully or at all, or may take longer to realize than expected, and our ability to compete, our revenue and gross margins and our results of operations may be adversely affected.
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We face significant competition from other technology companies.
The service assurance, application performance management, network security and business intelligence markets are highly competitive, rapidly evolving, and fragmented markets that have overlapping technologies and competitors, both large and small, and we expect competition on solutions offerings and pricing to increase. We believe customers make service management system, network security and business intelligence purchasing decisions based primarily upon the following factors:
product and service performance, functionality and price;
timeliness of new product and service introductions;
network capacity;
ease of installation, integration, and use;
customer service and technical support;
name and reputation of vendor;
quality and value of the product and services; and
alliances with industry partners.
We compete with a large and growing number of providers of service assurance, application performance management solutions, network security offerings and network traffic analyzers and probes, as well as with providers of business intelligence services. In addition, leading network equipment, network security and service assurance and application technology vendors offer their own management solutions, including products which they license from other competitors. Some of our current and potential competitors have greater name recognition and substantially greater financial, management, marketing, service, support, technical, distribution and other resources than we do. In addition, some of our customers develop their own in-house solutions to meet their technological needs. Further, in recent years some of our competitors have been acquired by larger companies that are seeking to enter or expand in the markets in which we operate. We expect this trend to continue as companies attempt to strengthen or maintain their market positions in an evolving industry. Therefore, given their larger size and greater resources, our competitors may be able to respond more effectively than we can to new or changing opportunities, technologies, standards and customer requirements.
As a result of the competitive factors highlighted in this section and in other risk factors, including the introduction of disruptive technologies, we may not be able to compete effectively with our current or future competitors. If we are unable to anticipate or react to these competitive challenges or if existing or new competitors gain market share in any of our markets, our competitive position could weaken and we could experience a decline in our sales that could adversely affect our business and operating results. This competition could result in increased pricing pressure, reduced profit margins, increased sales and marketing expenses, and failure to increase, or the loss of market share, any of which would likely have a material and adverse impact on our business, operating results and financial condition.
Uncertainties of regulation of the Internet and data traveling over the Internet could have a material and adverse impact on our financial condition and results of operations.
Currently, few laws or regulations apply directly to access to or commerce conducted on the Internet. We could be materially adversely affected by increased regulation of the Internet and Internet commerce in any country where we operate.operate, as well as access to or commerce conducted on the Internet. Further, governments may further regulate or restrict the sales, licensing, distribution, and export or import of certain technologies to certain countries. The adoption of additional regulation of the Internet and Internet commerce could decrease demand for our products, and, at the same time, increase the cost of selling our products, which could have a material and adverse effect on our financial condition and results of operations.
We are subject to stringent and changing laws, regulations, standards, contractual obligations, and other obligations related to privacy, data protection, and data security. The rapid evolutionactual, alleged, or perceived failure by us or the partners we work with to comply with such obligations could adversely affect our business, results of operations, and increasing enforcement of privacyfinancial conditions.
We are subject to numerous domestic and securityforeign laws and regulations around the world could require significant company resources, limit certain functionalities of our products,other obligations relating to privacy, data protection, and harm our business.
data security. The enactment of new federal, state, and foreignregulatory framework for data privacy and security lawsissues worldwide is rapidly evolving, and as a result, legal requirements and enforcement practices are likely to continue to evolve. In many jurisdictions, enforcement activities and consequences for noncompliance are rising. In the United States, these activities include enforcement actions in response to rules and regulations promulgated under the authority of federal agencies, state attorneys general, states' legislation, and changesconsumer protection agencies. In addition, privacy advocates and industry groups in the United States have regularly proposed,
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and may propose in the future, self-regulatory security standards with which we may be required to existing legal frameworkscomply. If we fail to follow these standards, we may incur significant fines or experience a significant increase in costs.
Internationally, the data protection landscape is also rapidly evolving, and we expect there will continue to be new and proposed laws, regulations, and industry standards concerning privacy, data protection, and data security. The General Data Protection Regulation ("GDPR") went into effect in the European Union ("EU") in May 2018 and has been adopted as law in the United Kingdom ("UK"). The GDPR requires companies to give detailed disclosures about how they collect, use, and share personal information; contractually commit to data protection measures in contracts with customers and vendors; maintain adequate data security measures; notify regulators and affected individuals of certain data breaches; meet extensive privacy governance and documentation requirements; and honor individuals’ data protection rights, including their rights to access, correct, and delete their personal information. The GDPR also requires controllers to conduct data protection impact assessments for certain types of processing and requires processors to assist controllers with such assessments, which may be complex and burdensome to conduct. Laws in EU member states and the UK also impose restrictions on direct marketing communications and the use of cookies and similar technologies online.
European data protection laws including the GDPR also generally prohibit the transfer of personal information from Europe to the United States and most other countries unless the parties to the transfer have required an adjustmentimplemented specific safeguards to someprotect the transferred personal information. there is uncertainty regarding how to ensure that transfers of personal information from Europe comply with European data protection laws. As such, any transfers of personal information from Europe by us or our internal processespartners may increase our exposure to the GDPR’s heightened sanctions for violations of its cross-border data transfer restrictions, and increased compliance costs. We expect future changes could require similar efforts and resources with regard to compliance. The adoption of or changes to any such data privacy and laws and regulations could affectmay reduce demand for our products, increase the cost of selling our products and divert time and attentionservices from companies subject to European data protection laws. Loss of our management, allability to transfer personal information from Europe may also require us to increase our data processing capabilities in those jurisdictions at significant expense.
Complying with foreign and domestic data protection laws may cause us to incur additional operational costs or require us to change our business practices. Despite our efforts, we may fail to achieve full compliance either due to internal or external factors such as lack of vendor cooperation. Any actual, alleged, or perceived non-compliance could result in legal proceedings against us by governmental entities, customers, data subjects, or others.
We are or may become subject to the terms of our privacy and security policies, representations, certifications, standards, publications, and contractual obligations relating to privacy, data protection, and data security. Although we endeavor to comply with our obligations, we and the third parties on which we rely may at times fail to do so or may be perceived to have failed to do so. Such failures could have a materialsubject us to regulatory enforcement action as well as costly legal claims by affected individuals or our customers.
We strive to comply with applicable privacy, data protection, and adverse effectdata security laws and other obligations, but we cannot fully determine the impact that current or future such laws and other obligations may have on our business or operations. Such laws or obligations may be inconsistent from one jurisdiction to another or subject to differing interpretations, and courts or regulators may deem our efforts to comply as insufficient. If we or the third parties we rely on to operate our business and deliver our services fail to comply, or are perceived as failing to comply, with our legal, contractual, or other obligations relating to privacy, data protection, or data security, or our policies and documentation relating to personal information, we could face governmental enforcement action; litigation with our customers, individuals or others, fines and civil or criminal penalties for us or company officials, obligations to cease offering our services or to substantially modify them in ways that make them less effective in certain jurisdictions, negative publicity and harm to our brand and reputation, and reduced overall demand for our services. Such developments could adversely affect our business, financial condition, and results of operations.
Foreign data protectioncurrency exchange rates may adversely affect our financial statements.
A material portion of our revenue is derived from international operations. Our consolidated financial results are reported in U.S. dollars. Most of the revenue and expenses of our foreign subsidiaries are denominated in local currencies. Given that cash is typically received over an extended period of time for many of our license agreements and given that a material and increasing portion of our revenue is generated outside of the United States, fluctuations in foreign exchange rates (including the Euro) against the U.S. dollar could result in substantial changes in reported revenues and operating results due to the foreign exchange impact upon translation of these transactions into U.S. dollars.
In the normal course of business, we employ various hedging strategies to partially mitigate these risks, including the use of derivative instruments. These strategies may not be effective in fully protecting us against the effects of fluctuations from movements in foreign exchange rates, including the increased volatility in foreign exchange rates during the COVID-19
25

pandemic and future global pandemics and other events. Fluctuations of the foreign exchange rates could materially adversely affect our business, financial condition, operating results, and cash flow.
Additionally, sales and purchases in currencies other than the U.S. dollar expose us to fluctuations in foreign currencies relative to the U.S. dollar and may adversely affect our financial statements. Increased strength of the U.S. dollar increases the effective price of our products sold in U.S. dollars into other countries, which may require us to lower our prices or adversely affect sales to the extent we do not increase local currency prices. Decreased strength of the U.S. dollar could adversely affect the cost of materials, products, and services we purchase overseas. Sales and expenses of our non-U.S. businesses are also translated into U.S. dollars for reporting purposes and the strengthening or weakening of the U.S. dollar could result in unfavorable translation effects. In addition, we may invoice customers in a currency other than the functional currency of our business, and movements in the invoiced currency relative to the functional currency could also result in unfavorable translation effects. We also face exchange rate risk from our investments in subsidiaries owned and operated in foreign countries.
If we violate the U.S. Foreign Corrupt Practices Act or applicable anti-bribery laws in other countries, or if we fail to comply with U.S. export controls and government contracting laws, our business could be harmed.
We earn a material portion of our total revenues from international sales. As a result, we must comply with complex foreign and U.S. laws and regulations, are rapidly evolving. such as the U.S. Foreign Corrupt Practices Act, the U.K. Bribery Act, and other local laws prohibiting corrupt payments to government officials and others, as well as anti-competition regulations.
The European Union (EU) data protection law, the General Data Protection Regulation (GDPR)U.S. Foreign Corrupt Practices Act (FCPA), which became effectivecontinues to see increased enforcement in May 2018, is wide-rangingrecent years, generally prohibits U.S. companies and their intermediaries from making corrupt payments to foreign officials for the purpose of obtaining or keeping business or otherwise obtaining favorable treatment and requires companies to maintain appropriate record-keeping and internal accounting practices to accurately reflect the transactions of the company. Under the FCPA, U.S. companies may be held liable for actions taken by agents or local partners or representatives. In addition, regulators may seek to hold us liable for successor liability FCPA violations committed by companies which we acquire. We are also subject to the U.K. Bribery Act and may be subject to certain anti-corruption laws of other countries in scope. which we do business.
In orderaddition to adaptanti-bribery and anti-corruption laws, we are also subject to these new requirements,the export and re-export control laws of the U.S., including the U.S. Export Administration Regulations (EAR) and the office of Foreign Asset Control (OFAC), as well as to U.S. government contracting laws, rules and regulations, and may be subject to government contracting laws of other countries in which we continuedo business. If we or our distributors, resellers, agents, or other intermediaries fail to invest resources necessary to enhance our policies and controls across our business units and services relating to how we collect and use personal data from customers and employees and how vendors handle personal data we provide to them. Similar privacy and data protection laws have also been proposed in other states and at the federal level.
Any actual or perceived failure by us to adequately comply with privacy and securitythe FCPA, the EAR, OFAC or U.S. government contracting laws, and regulations, or the anti-corruption, export or governmental contracting laws of other countries, governmental authorities in the U.S. or other countries could seek to protect personal data and other data we process impose civil and/or maintain may harm our reputation and negatively impact sales, or could result in damage to our reputation, loss of goodwill, decreased sales, regulatory investigations and enforcement actions against us, fines,criminal penalties, and other liabilities, and claims by customers and other third parties, any of which could have a material adverse effect on our business, results of operations, financial performanceconditions and business.cash flows.
WeViolations of these laws and regulations could result in fines and penalties, criminal sanctions, restrictions on our business conduct and on our ability to offer our products and services in one or more countries. Such violations could also adversely affect our suppliers may be impacted by new regulations related to climate change or other environmental issues.
We or our suppliers may become subject to new laws enactedreputation with regards to climate change or other environmental issues. In the event that new laws are enacted or current laws are modified in countries in which we or our suppliers operate, our flow of product may be impactedexisting and prospective customers, which could have a materialnegatively impact our operating results and adverse effect on our financial condition and results of operations.growth prospects.
The current economic and geopolitical environment may impact some specific industries into which we sell and may lead our customers to delay or forgo technology investments and could have other impacts, any of which could materially adversely affect our business, financial condition, operating results and cash flows.
Many of our customers are concentrated in certain industries, including financial services, public sector, healthcare, and the service provider market segment.market. Certain industries may be more acutely affected by economic, geopolitical, and other factors, including public heath crises (including global pandemics such as the COVID-19 pandemic), and changes in U.S. trade policy with China and other countries, than other sectors. Our public sector customers are affected by federal, state, and local budget decisions. To the extent that one or more of the sectors in which our customer base operates is


adversely impacted, whether as a result of general conditions affecting all sectors or as a result of conditions affecting only those particular sectors, our business, financial condition and results of operations could be materially and adversely impacted. If companies in our target markets reduce capital expenditures, we may experience a reduction in sales, longer sales cycles, slower adoption of new technologies as well as downward pressure on the price of our products. There can be no assurance that any decrease in sales resulting from the COVID-19 pandemic will be offset by increased sales in subsequent periods. Although the magnitude of the impact of the COVID-19 pandemic on our business and operations remains uncertain, the continued spread of COVID-19 or the occurrence of other epidemics and the imposition of related public health measures and travel and business restrictions could adversely impact our business, financial condition, operating results and cash flows.
26

International economic, political, legal, compliance and business factors could negatively affect our financial statements and growth.
We expect to continue to develop our sales and presence outside the U.S., particularly in high-growth markets. Our international business (and particularly our business in high-growth markets) is subject to risks that are customarily encountered in non-U.S. operations, any of which could negatively affect our business, financial condition, and results of operations.
General Risk Factors
Our actual operating results may differ significantly from our guidance.
We generally release guidance regarding our future performance on our quarterly earnings conference calls, quarterly earnings releases, and otherwise. Such guidance, which includes forward-looking statements, reflects our management’s estimates as of the date of release and is based on projections prepared by our management. We may also decide not to release, or to defer, issuing guidance, where such guidance might not be appropriate or when we do not have sufficient visibility or clarity to issue such guidance. In particular,those situations, we expect to communicate our reasons for not releasing or deferring release of guidance.
Projections are based upon a number of assumptions and estimates that, while presented with numerical specificity, are inherently subject to significant business, economic and competitive uncertainties and contingencies, many of which are beyond our control and are based upon specific assumptions with respect to future business decisions, some of which will change. The principal reason that we release guidance is to provide a basis for our management to discuss our business outlook with analysts and investors. We are not responsible for any projections or reports published by any such analysts or investors.
Guidance is necessarily speculative in nature, and it can be expected that some or all of the assumptions underlying the guidance furnished by us will not materialize or will vary significantly from actual results. Accordingly, our guidance is only an estimate of what management believes is realizable as of the date of release. Actual results may vary from our guidance and the variations may be material. In light of the foregoing, investors are urged not to rely upon our guidance in making an investment decision regarding our common stock.
Any failure to successfully implement our operating strategy or the occurrence of any of the events or circumstances set forth in this "Risk Factors" section in this report could result in the actual operating results being different from our guidance, and the differences may be adverse and material.
Our effective tax rate may fluctuate, which could increase our income tax expense and reduce our net income.
Our effective tax rate or the taxes we owe could be adversely affected by votersseveral factors, many of which are outside of our control, including:
changes in the relative proportions of revenues and income before taxes in the various jurisdictions in which we operate that have differing statutory tax rates;
changing tax laws, regulations, and interpretations in multiple jurisdictions in which we operate as well as the requirements of certain tax rulings;
changes in the research and development tax credit laws;
earnings being lower than anticipated in jurisdictions where we have lower statutory rates and being higher than anticipated in jurisdictions where we have higher statutory rates;
the valuation of generated and acquired deferred tax assets and the related valuation allowance on these assets;
transfer pricing adjustments;
the tax effects of purchase accounting for acquisitions and restructuring charges that may cause fluctuations between reporting periods; and
tax assessments or any related tax interest or penalties that could significantly affect our income tax expense for the period in which the settlements take place.
We are subject to income taxes in the United KingdomStates and in numerous foreign jurisdictions. From time to leavetime, we may receive notices that a tax authority in a particular jurisdiction believes that we owe a greater amount of tax than we have reported to such authority.
While we regularly assess the European Union (EU) has resulted in significant and wide-ranging economic effects across multiple markets. A withdrawal could, among otherlikelihood of adverse outcomes disrupt the free movement of goods, services, and people between the United Kingdomfrom such examinations and the EU, and undermine bilateral cooperation in key policy areas. In addition, a withdrawal could lead to legal uncertainty and potentially divergent national laws and regulations as the United Kingdom determines which EU laws to replace or replicate. Given the lack of comparable precedent, it is unclear what financial, trade, and legal implications the withdrawal of the United Kingdom from the EU would have and how such withdrawal would affect us. We have taken steps to assess our Brexit-related risk and continue to monitor developments to assess potential business impacts.
The successadequacy of our business depends, in part, on the continued growth in the marketprovision for income taxes, there can be no assurance that such provision is sufficient and the continued commercial demand for service delivery, service assurance and network security solutions focused on the performance monitoring and management of applications and networks.
We derive nearly all of our revenue from the sale of products and services that are designed to allow our customers to assure the delivery of services through management of the performance and network security of applications across IP networks. Wea determination by a tax authority will not have actively expanded our operations in the past through acquisitions and organic growth and may continue to expand them in the future in order to gain share in the evolving market in which we operate. Therefore, we must be able to predict the appropriate features and prices for future products to address the market, the optimal distribution strategy and the future changes to the competitive environment. In order for us to be successful, our potential customers must recognize the value of more sophisticated application management and network security solutions, decide to invest in the management of their networked applications and, in particular, adopt our management solutions. Any failure of this market to continue to be viable would materially and adversely impact our business, operating results and financial condition. Additionally, businesses may choose to outsource the operations and management of their networks to managed service providers. Our business may dependan adverse effect on our ability to continue to develop relationships with these service providers and successfully marketresults of operations. An adverse change in our products to them.
Changes in industry structure and market conditionseffective tax rate could lead to charges related to discontinuances of certain of our products or businesses and asset impairments.
In response to changes in industry and market conditions, we may be required to strategically reallocate managerial, operational, financial and other resources. Any such efforts may result in charges related to consolidation of excess facilities or claims from third parties who were resellers or users of discontinued products.
Our growth could suffer if the markets into which we sell our products and services experience cyclicality.
Our growth will depend in part on the growth of the markets which we serve. We serve certain industries that have historically been cyclical and have experienced periodic downturns that have had a material and
27

adverse impacteffect on demand for the products, software and services that we offer. Any of these factors could adversely affect the business,our financial condition and results of operations ofand the combined company in any given period.
Uncertain conditions in the global economy and constraints in the global credit market may adversely affect our revenue and results of operations.
Disruptions in the global economy and constraints in the global credit market may cause someprice of our customers to reduce, delay, or cancel spending on capital and technology projects, resultingcommon stock could decline if our financial results are materially affected by an adverse change in reduced spending with us. While some industry sectors such as government and telecommunicationsour effective tax rate.
We may be less susceptibleimpacted by changes in taxation, trade, and other regulatory requirements.
We are subject to income tax in local, national, and international jurisdictions. In addition, our products are subject to import and excise duties and/or sales or value-added taxes (VAT) in many jurisdictions. We are also subject to the effectsexamination of our tax returns and other tax matters by the Internal Revenue Service and other tax authorities and governmental bodies. We regularly assess the likelihood of an economic slowdown,adverse outcome resulting from these examinations to determine the adequacy of our enterprise customers may be adversely affected, especially in financial services and consumer industries. Continued volatilityprovision for taxes. Additionally, changes in or disruptionthe improper application of financial markets could limit customers' abilityimport and excise duties and or sales taxes or VAT may negatively impact our operating results. There can be no assurance as to obtain adequate financing to maintain operationsthe outcome of these examinations. Fluctuations in tax rates and


result in a decrease in sales volume thatthese examinations could have a negative impactmaterial adverse effect on our results of operations. Further, competitorsoperations, financial condition, and cash flows.
There is increased uncertainty with respect to tax policy and trade relations between the U.S. and other countries. Major developments in tax policy or trade relations, such as the imposition of unilateral tariffs on imported products, could have a material adverse effect on our results of operations, financial condition, and cash flows.
Our estimates and judgments related to critical accounting policies could be inaccurate.
We consider accounting policies related to revenue recognition, marketable securities, valuation of goodwill, intangible assets and other acquisition and divestiture accounting items, and share-based compensation to be critical in fully understanding and evaluating our financial results. Management makes judgments and creates estimates when applying these policies. These estimates and judgments affect, among other things, the reported amounts of our assets, liabilities, revenue and expenses, the amounts of charges accrued by us, and related disclosure of contingent assets and liabilities. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances and at the time they are made. If our estimates or the assumptions underlying them are not correct, actual results may responddiffer materially from our estimates and we may need to, economic conditions by lowering their prices,among other things, accrue additional charges or impair assets that could adversely impact our business. As a result, our operating results and financial condition could be materially and adversely impacted in future periods.
Our disclosure controls and procedures and internal control over financial reporting may not be effective.
Our disclosure controls and procedures and internal control over financial reporting may not prevent all material errors and intentional misrepresentations. Any system of internal control can only provide reasonable assurance that all control objectives are met. Some of the potential risks involved could include, but are not limited to, management judgments, simple errors or mistakes, misinterpretation, and willful misconduct regarding controls. Under Section 404 of the Sarbanes-Oxley Act, we are required to evaluate and determine the effectiveness of our internal control over financial reporting. Compliance with this provision requires management's attention and expense. Management's assessment of our internal control over financial reporting may or may not identify weaknesses that need to be addressed in our internal control system. If we are unable to conclude that our internal control over financial reporting is effective, investors could lose confidence in our reported financial information which could put pressurehave an adverse effect on the market price of our pricing. We could also experience lower than anticipated order levels, cancellations of ordersstock or impact our borrowing ability. In addition, changes in backlog, defaults on outstanding accounts receivableoperating conditions and extended payment or delivery terms. Economic weakness, customerchanges in compliance with policies and procedures currently in place may result in inadequate disclosure controls and procedures and internal control over financial difficulties and constrained spending on IT initiatives have resulted, and mayreporting in the future result, in challenging and delayed sales cycles and could negatively impact our ability to forecast future periods. In addition, some of the markets we serve are emerging and the purchase of our products involves material changes to established purchasing patterns and policies. The purchase of our products is often discretionary and may involve a significant commitment of capital and other resources.future.
Our stock price has been subject to fluctuations, and will likely continue to be subject to fluctuations, which may be volatile and due to factors beyond our control.
The market price of our common stock is subject to wide fluctuations in response to various factors, some of which are beyond our control. In addition to the factors discussed in this "Risk Factors" section and elsewhere in this report, factors that could cause fluctuations in the market price of our common stock include the following:

actual or anticipated fluctuations in our operating results;
the financial projections we may provide to the public, any changes in these projections, or our failure to meet these projections;
failure of securities analysts to initiate or maintain coverage of our company, changes in financial estimates and publication of other news by any securities analysts who follow our company, or our failure to meet these estimates or the expectations of investors;
ratings changes by any securities analysts who follow our company;
announcements by us or our competitors of significant technical innovations, acquisitions, strategic partnerships, joint ventures, or capital commitments;
changes in operating performance and stock market valuations of other technology companies generally, or those in our industry in particular;
price and volume fluctuations in the overall stock market from time to time, including as a result of trends in the economy as a whole;
changes in accounting standards, policies, guidelines, interpretations, or principles;
actual or anticipated developments in our business or our competitors’ businesses or the competitive landscape generally;
28

developments or disputes concerning our intellectual property or our products and platform capabilities, or third-party proprietary rights;
cybersecurity attacks or incidents;
announced or completed acquisitions of businesses or technologies by us or our competitors;
new laws or regulations or new interpretations of existing laws, or regulations applicable to our business;
changes in our board of directors or management;
announced or completed equity or debt transactions involving our securities;
sales of shares of our common stock by us, our officers, directors, or other stockholders; and
lawsuits filed or threatened against us; and
other events or factors, including those resulting from public health crises (including global pandemics such as the COVID-19 pandemic), war, incidents of terrorism, or responses to these events.
In addition, the market for technology stocks and the stock markets in general have experienced extreme price and volume fluctuations. Stock prices of many technology companies have fluctuated in a manner unrelated or disproportionate to the operating performance of those companies. In the past, stockholders have instituted securities class action litigation following periods of market volatility. If we were to become involved in securities litigation, it could subject us to substantial costs, divert resources and the attention of management from our business, and adversely affect our business, results of operations, financial condition, and cash flows. A decline in the value of our common stock, including as a result of one or more factors set forth above, may result in substantial losses for our stockholders.

29


Item 1B. Unresolved Staff Comments
None.

Item 2. Properties
Our headquarters are located in Westford, MA, in approximately 175,000 square feet of space under a lease expiring in September 2030. In addition, we lease office and/or manufacturing space in other locations globally with some of the more significant locations from a cost or size perspective being in in Allen, Texas; San Jose, California; Ann Arbor, Michigan; Berkeley, California; Colorado Springs, CO; Bangalore, India; Pune, India; and Bangalore, India.Shanghai, China.
Item 3. Legal Proceedings
From time to time, we are subject to legal proceedings and claims in the ordinary course of business. In the opinion of management, the amount of ultimate expense with respect to any current legal proceedings and claims, if determined adversely, will not have a material adverse effect on the our financial condition, results of operations or cash flows.
As previously disclosed, in March 2016, Packet Intelligence LLC (Packet Intelligence or Plaintiff) filed a Complaint against usNetScout and two subsidiary entities in the United States District Court for the Eastern District of Texas asserting infringement of five United States patents. Plaintiff’s Complaint alleged that legacy Tektronix GeoProbe products, including the G10 and GeoBlade products, infringed these patents. WeNetScout filed an Answer denying Plaintiff’s allegations and asserting that Plaintiff’s patents were, among other things, invalid, not infringed, and unenforceable due to inequitable conduct. In October 2017, a jury trial was held to address the parties’ claims and counterclaims regarding infringement of three patents by the G10 and GeoBlade products, invalidity of these patents, and damages. On October 13, 2017, the jury rendered a verdict finding in favor of the Plaintiff and that Plaintiff was entitled to $3,500,000 for pre-suit damages and $2,250,000 for post-suit damages. The jury indicated that the awarded damages amounts were intended to reflect a running royalty. The Court also conducted a bench trial on whether these patents were unenforceable due to, among other things, inequitable conduct. In September 2018, the Court entered judgment and "enhanced" the jury verdict in the amount of $2.8 million as a result of a jury finding. The judgment also awards pre- and post judgementpost-judgment interest, and a running royalty on the G10 and GeoBlade products until the expiration of the patents at issue, the last date being June 2022. The Court denied the Plaintiff's motion for fees. Following the entry of final judgment, on June 12, 2019, we filed motionsour Notice of Appeal. On July 14, 2020, the Court of Appeals for judgment asthe Federal Circuit issued a matterdecision vacating the $3,500,000 pre-suit damages award, affirming the $2,250,000 post-suit damages award, and remanding to the district court to determine what, if any, enhancement should be awarded. On March 15, 2021, NetScout filed a petition for a writ of law, seekingcertiorari to both overturn the verdictUnited States Supreme Court, which was subsequently denied, challenging, among other issues, the basis for enhanced damages and the patentability of the claimed technology. NetScout continues to reduce damages. We haveavail itself of its legal options. NetScout has concluded that the risk of loss from this matterassociated with the post-suit damages award is currently neither remote nor probable,"probable" in accounting terms, regardless of the options NetScout may pursue, and therefore, under GAAP definitions,that the risk of loss associated with pre-suit damages is termed "reasonably possible". Therefore, accountingnow remote. Accounting rules require us to provide an estimate for the range of potential liability. WeNetScout currently estimateestimates that the estimated range of liability is between $0 and the aggregate amount awarded by the jury and the Court's awardsum of enhancedpost-suit damages, plus potential additional pre- and post-judgment interest amounts and costs and any royalties owed on post-trial sales of the accused G10 and GeoBlade products. We intendAny potential enhancement is not reasonably estimable but is likely within the range of $0 to continue to vigorously dispute Packet Intelligence’s claims including through appeal, if necessary.$2,800,000.
Item 4. Mine Safety Disclosures
None.

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PART II
Item 5. Market for Registrant's Common Equity, Related Stockholder Matters, and Issuer Purchases of Equity Securities
Price Range of Common Stock
Our common stock trades on the Nasdaq Global Select Market, under the symbol NTCT.
Stockholders
At May 13, 2019,10, 2021, we had 9992 stockholders of record. We believe that the number of beneficial holders of our common stock exceeds 14,000.12,000.
Stock Performance Graph
This performance graph shall not be deemed "filed" for purposes of Section 18 of the Exchange Act or otherwise subject to the liabilities under that Section, and shall not be deemed to be incorporated by reference into any filing of NetScout under the Exchange Act or the Securities Act of 1933, as amended.
The Stock Performance Graph set forth below compares the yearly change in the cumulative total stockholder return on our common stock during the five-year period from March 31, 20142016 through March 31, 20192021 with the cumulative total return of the Nasdaq Composite Index and the Nasdaq Computer & Data Processing Index. The comparison assumes $100 was invested on March 31, 20142016 in our common stock or in the Nasdaq Composite Index and the Nasdaq Computer & Data Processing Index and assumes reinvestment of dividends, if any.
The stock price performance shown on the graph below is not necessarily indicative of future price performance. Information used in the graph was obtained from Zacks Investment Research, Inc.
COMPARISON OF 5 YEAR CUMULATIVE TOTAL RETURN
Assumes Initial Investment of $100


chart-defee0c535f7535797f.jpgntct-20210331_g1.jpg
3/31/20163/31/20173/31/20183/31/20193/31/20203/31/2021
NetScout Systems, Inc.$100.00 $165.22 $114.71 $122.20 $103.05 $122.59 
Nasdaq Composite – Total Returns$100.00 $122.88 $148.39 $164.16 $165.30 $286.62 
Nasdaq Computer and Data Processing$100.00 $123.37 $164.89 $193.77 $212.88 $342.30 
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 3/31/2014 3/31/2015 3/31/2016 3/31/2017 3/31/2018 3/31/2019
NetScout Systems, Inc.$100.00
 $116.68
 $61.12
 $100.98
 $70.12
 $74.69
Nasdaq Composite – Total Returns$100.00
 $118.12
 $118.77
 $145.94
 $176.24
 $194.97
Nasdaq Computer and Data Processing$100.00
 $109.40
 $138.82
 $171.00
 $234.31
 $279.45



Dividend Policy
In fiscal years 20192021 and 2018,2020, we did not declare any cash dividends and do not anticipate declaring cash dividends in the foreseeable future. In addition, the terms of our credit facility limit our ability to pay cash dividends on our capital stock. It is our intention to retain all future earnings for reinvestment to fund our expansion and growth, to pay down our debt, and to fund our stock buyback program further described under Item 7 "Liquidity and Capital Resources." Any future cash dividend declaration will be at the discretion of our Board of Directors and will depend upon, among other things, our future earnings, general financial conditions, capital requirements, existing bank covenants and general business conditions.
Recent Sales of Unregistered Securities
None.
Purchases of Equity Securities by the Issuer
The following table provides information about purchases we made during the quarter ended March 31, 20192021 of equity securities that are registered by us pursuant to Section 12 of the Exchange Act:
 
Total Number
of Shares
Purchased(1)
 
Average Price
Paid per Share
 
Total Number of
Shares Purchased
as Part of Publicly
Announced Plans
or Programs
 
Maximum Number of Shares That May
Yet be Purchased
Under the
Program
1/1/2019 - 1/31/2019
 $
 
 14,902,841
2/1/2019 - 2/28/2019383,744
 26.52
 363,098
 14,539,743
3/1/2019 - 3/31/2019180,784
 26.79
 180,153
 14,359,590
Total564,528
 $26.61
 543,251
 14,359,590
Total Number
of Shares
Purchased (1)
Average Price
Paid per Share
Total Number of
Shares Purchased
as Part of Publicly
Announced Plans
or Programs
Maximum Number of Shares That May
Yet be Purchased
Under the
Program
1/1/2021 - 1/31/2021413 $30.23 — 7,089,160 
2/1/2021 - 2/28/202115,401 30.69 — 7,089,160 
3/1/2021 - 3/31/20211,196 27.85 — 7,089,160 
Total17,010 $30.48 — 7,089,160 
 
(1)We purchased an aggregate of 21,277 shares transferred to us from employees in satisfaction of minimum tax withholding obligations associated with the vesting of restricted stock units during the period. Such purchases reflected in the table do not reduce the maximum number of shares that may be purchased under our previously announced stock repurchase program (our previously disclosed 25 million share repurchase program).


(1)We purchased an aggregate of 17,010 shares transferred to us from employees in satisfaction of tax withholding obligations associated with the vesting of restricted stock units during the period. Such purchases reflected in the table do not reduce the maximum number of shares that may be purchased under our previously announced stock repurchase program (our previously disclosed 25 million share repurchase program).


Item 6. Selected Financial Data
SELECTED CONSOLIDATED FINANCIAL DATA
The selected consolidated financial data set forth below should be read in conjunction with our audited consolidated financial statements and notes thereto and "Management’s Discussion and AnalysisInformation required by Item 6 of Financial Condition and Results of Operations" included under Item 7 of this Annual Report on Form 10-K. The consolidated statement of operations data for the fiscal years ended March 31, 2019, 2018 and 2017 and the consolidated balance sheet data at March 31, 2019 and 2018 are derived from audited consolidated financial statements included under Item 8 of this Annual Report on Form 10-K. The consolidated statement of operations data for the fiscal years ended March 31, 2016 and 2015 and the consolidated balance sheet data at March 31, 2017, 2016 and 2015 have been derived from audited consolidated financial statements of NetScout that do not appear in this Annual Report on Form 10-K. Certain amounts for the twelve months ended March 31, 2018, 2017 and 2016, respectively, have been reclassified to conform10-K is omitted pursuant to the current period presentation. These reclassifications had no effect on the reported resultsSEC's adoption of operations. The historical results are not necessarily indicative of the operating resultsamendments to be expected in the future.Regulation S-K effective February 10, 2021.

32
 Year Ended March 31,
 2019 2018 2017 2016 (1) 2015
 (In thousands, except per share data)
Statement of Operations Data:         
Revenue:         
Product$467,289
 $520,418
 $715,404
 $625,537
 $272,895
Service442,629
 466,369
 446,708
 329,882
 180,774
Total revenue909,918
 986,787
 1,162,112
 955,419
 453,669
Cost of revenue:         
Product140,938
 158,628
 233,275
 235,996
 59,037
Service113,189
 113,277
 112,864
 92,453
 35,524
Total cost of revenue254,127
 271,905
 346,139
 328,449
 94,561
Gross profit655,791
 714,882
 815,973
 626,970
 359,108
Operating expenses:         
Research and development203,588
 215,076
 232,701
 208,630
 75,242
Sales and marketing291,870
 312,536
 328,628
 293,335
 136,446
General and administrative93,572
 109,479
 118,438
 117,714
 47,296
Amortization of acquired intangible assets74,305
 76,640
 70,141
 32,373
 3,351
Restructuring charges18,693
 5,209
 4,001
 468
 
Impairment of intangible assets35,871
 
 
 
 
Loss on divestiture of business9,472
 
 
 
 
Total operating expenses727,371
 718,940
 753,909
 652,520
 262,335
Income (loss) from operations(71,580) (4,058) 62,064
 (25,550) 96,773
Interest and other expense, net(21,332) (14,601) (9,879) (6,889) (1,808)
Income (loss) before income tax expense (benefit)(92,912) (18,659) 52,185
 (32,439) 94,965
Income tax expense (benefit)(19,588) (98,471) 18,894
 (4,070) 33,773
Net income (loss)$(73,324) $79,812
 $33,291
 $(28,369) $61,192
Basic net income (loss) per share$(0.93) $0.91
 $0.36
 $(0.35) $1.49
Diluted net income (loss) per share$(0.93) $0.90
 $0.36
 $(0.35) $1.47
Weighted average common shares outstanding used in computing:         
Net income (loss) per share—basic78,617
 87,425
 92,226
 81,927
 41,105
Net income (loss) per share—diluted78,617
 88,261
 92,920
 81,927
 41,637



(1)During the fiscal year ended March 31, 2016, NetScout completed the Comms Transaction. The total equity consideration was approximately $2.3 billion based on issuing approximately 62.5 million new shares of NetScout common stock.


 March 31,
 2019 2018 2017 2016 (1) 2015
 (In thousands)
Balance Sheet Data:         
Cash, cash equivalents and short- and long-term marketable securities$486,988
 $447,762
 $464,705
 $352,075
 $264,857
Working capital$421,286
 $339,108
 $394,279
 $283,422
 $149,651
Total assets$3,269,994
 $3,368,608
 $3,601,513
 $3,592,843
 $669,049
Debt$550,000
 $600,000
 $300,000
 $300,000
 $
Total stockholders’ equity$2,065,433
 $2,068,782
 $2,436,250
 $2,443,382
 $435,750
(1)During the fiscal year ended March 31, 2016, NetScout completed the Comms Transaction. The total equity consideration was approximately $2.3 billion based on issuing approximately 62.5 million new shares of NetScout common stock.
Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations
The following information should be read in conjunction with the audited consolidated financial information and the notes thereto included in this Annual Report on Form 10-K. In addition to historical information, the following discussion and other parts of this Annual Report contain forward-looking statements that involve risks and uncertainties. You should not place undue reliance on these forward-looking statements. Actual events or results may differ materially due to competitive factors and other factors discussed in Item 1A. "Risk Factors" and elsewhere in this Annual Report. These factors may cause our actual results to differ materially from any forward-looking statement. See the section titled "Cautionary Statement Concerning Forward-Looking Statements" that appears at the beginning of this Annual Report.
Overview
We are an industry leader with over 35 years of experience in providing service assurance and securitycybersecurity solutions that are used by customers worldwide to assureprotect their digital business services against disruption. Service providers and enterprises, including local, state and federal government agencies, rely on our solutions to achieve the visibility necessary to optimize network performance, ensure the delivery of high-quality, mission-critical applications and services, gain timely insight into the end user experience and protect the networktheir networks from attack. With our offerings, customers can quickly, efficiently and effectively identify and resolve issues that result in downtime, interruptions to services, poor service quality or compromised security,data, thereby driving compelling returns on their investments in their networknetworks and broader technology initiatives. Some of the more significant technology trends and catalysts for our business include the evolution of customers' digital transformation initiatives such as the migration to cloud environments, the rapidly evolving cybersecurity threat landscape, business intelligence and analytics advancements, and the 5G evolution in both the service provider and enterprise verticals.
Our operating results are influenced by a number of factors, including, but not limited to, the mix and quantity of products and services sold, pricing, costs of materials used in our products, growth in employee-related costs, including commissions, and the expansion of our operations. Factors that affect our ability to maximize our operating results include, but are not limited to, our ability to introduce and enhance existing products, the marketplace acceptance of those new or enhanced products, continued expansion into international markets, development of strategic partnerships, competition, successful acquisition integration efforts, and our ability to achieve expense reductionscontrol cost and make improvements in a highly competitive industry.
COVID-19 Impact
In March 2020, the World Health Organization declared the novel strain of coronavirus (COVID-19) a global pandemic and recommended containment and mitigation measures worldwide. The pandemic and these containment and mitigation measures have led to adverse impacts on the U.S. and global economies. Due to the critical nature of our products and services, we are considered critical under State and Federal guidelines. While we have begun a phased reopening at some of our facilities, we remain focused on protecting the health and well-being of our employees and continue to maintain work from home policies for a vast majority of our employees where feasible.
We continue to closely monitor the impact of the COVID-19 pandemic on all aspects of our business, including how it has impacted and could continue to impact our customers, employees, supply chain, and distribution network. In fiscal year 2021, the COVID-19 pandemic and resulting challenging macro-economic environment caused elongated purchasing cycles that impacted our revenue. For fiscal year 2022, as people in the world begin to get immunized and return to "normal", we expect that technology and project spending will resume and will be focused on advancing our products, growing revenue, enhancing earnings per share, and generating solid free cash flow.
We believe our current cash reserves and access to capital through our revolving credit facility leave us well-positioned to manage our business as the crisis continues and as a recovery eventually occurs. We expect net cash provided by operating activities combined with cash, cash equivalents and marketable securities and borrowing availability under our revolving credit facility to provide sufficient liquidity to fund current obligations, capital spending, debt service requirements and working capital requirements over at least the next twelve months. We continue to take actions to control costs and increase productivity throughout our company but will invest in areas that advance our business for the future, as necessary. In addition to our cash equivalents, based on covenant levels at March 31, 2021, we have an incremental $336 million available to us under our $1.0 billion revolving credit facility.
On March 27, 2020, the Coronavirus Aid, Relief and Economic Security Act (the CARES Act) was enacted. The CARES Act, among other things, includes provisions relating to refundable payroll tax credits, deferment of employer social security payments, net operating loss carryback periods, alternative minimum tax credit refunds, modifications to the net interest deduction limitations and technical corrections to tax depreciation methods for qualified improvement property. We have elected to defer the employer-paid portion of social security taxes. As of March 31, 2021, we had deferred $8.9 million of
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employer payroll taxes, of which 50% are required to be deposited by December 2021 and the remaining 50% by December 2022.
The extent of the impact of the COVID-19 pandemic on our operational and financial performance will depend on certain developments, including the duration of the pandemic, its impact on our customers and suppliers and the range of governmental and community reactions to the pandemic, which continue to evolve and cannot be fully predicted at this time. We will continue to proactively respond to the situation and may take further actions that alter our business operations as may be required by governmental authorities, or that we determine are in the best interests of our stakeholders.
Results Overview
Total revenue for the fiscal year ended March 31, 2021 as compared to total revenue for the fiscal year ended March 31, 20192020 was primarilyprimarily impacted by lower spending by customersa decrease in revenue from our service assurance offerings in both the service provider customer segment for bothand enterprise verticals, partially offset by an increase in revenue from our cybersecurity offerings, or more particularly, the service assurance andportion of our DDoS solutions, and the timing of the divestiture of the HNT tools business in mid-September 2018.offerings.
Our gross profit percentage remained flat at 73% during the fiscal year ended March 31, 20192021 as comparedcompared with the fiscal year ended March 31, 2018.

2020.
Net income for the fiscal year ended March 31, 2021 was $19.4 million, as compared with a net loss for the fiscal year ended March 31, 20192020 of $2.8 million, an increase of $22.2 million. A decrease in revenue of $60.5 million was $73.3 million,more than offset by a decrease in expenses as compared with net income for the fiscal year ended March 31, 2018 of $79.8 million, resulting in an increase in net loss of $153.1 million. The increase in net lossincome was primarily due to a $78.9$23.5 million decrease in the income tax benefit,travel expenses primarily attributable to COVID-19 related restrictions, a $35.9$16.2 million impairment chargedecrease in direct material costs, a $9.4 million decrease in amortization of certain intangible assets, a $6.9 million decrease in expenses related to the HNT tools business,trade shows and other sales and marketing related events attributable to continued cost control and COVID-19 related restrictions, a $13.5$6.7 million increasedecrease in legal fees and penalties, a $5.2 million decrease in commissions expense, a $5.0 million decrease in inventory-related charges, a $2.6 million decrease in restructuring charges, due to the voluntary separation program, a $13.5 million increase in interest expense due to additional amounts drawn down on the credit facility as well as an increase in the average interest rate on the credit facility, and a $9.5 million loss on the divestiture of the HNT tools business during the twelve months ended March 31, 2019. This increase was partially offset by a net $9.0$2.5 million decrease in employee-relatedadvertising and other marketing related expenses, asand a result of a$2.0 million decrease in headcount partially offset by an increase in incentive compensation.rent expense.
At March 31, 2019,2021, we had cash, cash equivalents, and marketable securities (current and non-current) of $487.0$476.5 million. This represents an increase of $39.2$87.4 million overcompared to the previous fiscal year ended March 31, 2018.2020. This increase was primarily due to $149.8$213.9 million in cash provided by operations during the fiscal year ended March 31, 2019, partially2021. This increase was offset by $50.0$100.0 million used to repay long-term debt, $23.4$13.3 million used for tax withholdings in connection with the vesting of restricted stock units, $12.0 million used for capital expenditures, $14.5$4.5 million used for purchases of intangible assets and $3.3 million used to repurchase shares of our common stock and $11.9 million used for tax withholdings on restricted stock units.during the fiscal year ended March 31, 2021.
Use of Non-GAAP Financial Measures
We supplement the United States generally accepted accounting principles (GAAP) financial measures we report in quarterly and annual earnings announcements, investor presentations and other investor communications by reporting the following non-GAAP measures: non-GAAP total revenue, non-GAAP product revenue, non-GAAP service revenue, non-GAAP gross profit, non-GAAP income from operations, non-GAAP operating margin, non-GAAP earnings before interest and other expense, income taxes, depreciation and amortization (EBITDA) from operations, non-GAAP net income, and non-GAAP net income per share (diluted). Non-GAAP revenue (total, product and service) eliminates the GAAP effects of acquisitions by adding back revenue related to deferred revenue revaluation, as well as revenue impacted by the amortization of acquired intangible assets.revaluation. Non-GAAP gross profit includes the aforementioned revenue adjustments and also removes expenses related to the amortization of acquired intangible assets, share-based compensation, certain expenses relating to acquisitions including depreciation costs, compensation for post-combination services and business development and integration costs and adds back transitional service agreement income.acquisition-related depreciation. Non-GAAP income from operations includes the aforementioned adjustments and also removes business development and integration expense, compensation for post-combination services, legal judgments expense, restructuring charges, intangible asset impairment charges, loss on divestiture and costs related to new accounting standard implementation.implementation and adds back transitional service agreement income. Non-GAAP EBITDA from operations includes the aforementioned items related to non-GAAP income from operations and also removes non-acquisition-related depreciation expense. Non-GAAP net income includes the foregoing adjustments related to non-GAAP income from operations, net of related income tax effects in addition to the provisional one-time impacts of the U.S. Tax Cuts and Jobs Act (TCJA) while removing transitional service agreement income and changes in contingent consideration. Non-GAAP diluted net income per share also excludes these expenses as well as the related impact of all these adjustments on the provision for income taxes.
These non-GAAP measures are not in accordance with GAAP, should not be considered an alternative for measures prepared in accordance with GAAP (revenue, gross profit, operating profit, net income (loss) and diluted net income (loss) per share), and may have limitations in that they do not reflect all our results of operations as determined in accordance with GAAP. These non-GAAP measures should only be used to evaluate our results of operations in conjunction with the
34

corresponding GAAP measures. The presentation of non-GAAP information is not meant to be considered superior to, in isolation from, or as a substitute for results prepared in accordance with GAAP.
Management believes these non-GAAP financial measures enhance the reader's overall understanding of our current financial performance and our prospects for the future by providing a higher degree of transparency for certain financial measures and providing a level of disclosure that helps investors understand how we plan and measure our business. We believe that providing these non-GAAP measures affords investors a view of our operating results that may be more easily compared with our peer companies and also enables investors to consider our operating results on both a GAAP and non-GAAP basis during and following the integration period of our acquisitions. Presenting the GAAP measures on their own may not be indicative of our core operating results. Furthermore, management believes that the presentation of non-GAAP measures when shown in conjunction with the corresponding GAAP measures provide useful information to management and investors regarding present and future business trends relating to our financial condition and results of operations.








35


The following table reconciles revenue, gross profit, income (loss) from operations, net income (loss) and net income (loss) per share on a GAAP and non-GAAP basis for the fiscal years ended March 31, 2019, 20182021, 2020 and 2017:
2019:
 Fiscal Year Ended March 31,
(Dollars in Thousands, Except per Share Data)
 2019 2018 2017
GAAP revenue$909,918
 $986,787
 $1,162,112
Product deferred revenue fair value adjustment391
 3,064
 6,786
       Service deferred revenue fair value adjustment1,199
 9,409
 19,476
       Amortization of acquired intangible assets
 9
 11,439
Non-GAAP revenue$911,508
 $999,269
 $1,199,813
      
GAAP gross profit$655,791
 $714,882
 $815,973
Product deferred revenue fair value adjustment391
 3,064
 6,786
Service deferred revenue fair value adjustment1,199
 9,409
 19,476
Share-based compensation expense7,422
 5,983
 4,890
Amortization of acquired intangible assets31,238
 37,332
 53,455
Business development and integration expense
 244
 398
Compensation for post-combination services
 
 552
Acquisition related depreciation expense75
 145
 240
Transitional service agreement income2
 
 
Non-GAAP gross profit$696,118
 $771,059
 $901,770
      
GAAP income (loss) from operations$(71,580) $(4,058) $62,064
Product deferred revenue fair value adjustment391
 3,064
 6,786
Service deferred revenue fair value adjustment1,199
 9,409
 19,476
Share-based compensation expense56,328
 47,317
 39,189
Amortization of acquired intangible assets105,543
 113,972
 123,596
Business development and integration expense874
 2,689
 12,083
New standard implementation expense914
 2,630
 
Compensation for post-combination services789
 1,108
 5,076
Restructuring charges18,693
 5,209
 4,001
Impairment of intangible assets35,871
 
 
Acquisition related depreciation expense905
 2,057
 3,136
Loss on divestiture9,472
 
 
Transitional service agreement income2,186
 
 
Non-GAAP income from operations$161,585
 $183,397
 $275,407
      
GAAP net income (loss)$(73,324) $79,812
 $33,291
Product deferred revenue fair value adjustment391
 3,064
 6,786
Service deferred revenue fair value adjustment1,199
 9,409
 19,476
Share-based compensation expense56,328
 47,317
 39,189
Amortization of acquired intangible assets105,543
 113,972
 123,596
Business development and integration expense874
 2,689
 12,083
New standard implementation expense914
 2,630
 
Compensation for post-combination services789
 1,108
 5,076
Restructuring charges18,693
 5,209
 4,001

 Fiscal Year Ended March 31,
(Dollars in Thousands, Except per Share Data)
 202120202019
GAAP revenue$831,282 $891,820 $909,918 
Product deferred revenue fair value adjustment— — 391 
       Service deferred revenue fair value adjustment192 1,199 
Non-GAAP revenue$831,288 $892,012 $911,508 
GAAP gross profit$609,185 $649,628 $655,791 
Product deferred revenue fair value adjustment— — 391 
Service deferred revenue fair value adjustment192 1,199 
Share-based compensation expense6,861 6,843 7,422 
Amortization of acquired intangible assets19,058 24,974 31,238 
Acquisition related depreciation expense23 31 75 
Transitional service agreement income— — 
Non-GAAP gross profit$635,133 $681,668 $696,118 
GAAP income (loss) from operations$37,130 $17,638 $(71,580)
Product deferred revenue fair value adjustment— — 391 
Service deferred revenue fair value adjustment192 1,199 
Share-based compensation expense51,892 50,861 56,328 
Amortization of acquired intangible assets80,189 89,479 105,543 
Business development and integration expense373 874 
New standard implementation expense— 914 
Compensation for post-combination services251 578 789 
Restructuring charges62 2,674 18,693 
Impairment of intangible assets— — 35,871 
Acquisition related depreciation expense242 312 905 
Loss on divestiture— — 9,472 
Transitional service agreement income215 1,212 2,186 
       Legal judgments expense2,804 — — 
Non-GAAP income from operations$172,793 $163,324 $161,585 
GAAP net income (loss)$19,352 $(2,754)$(73,324)
Product deferred revenue fair value adjustment— — 391 
Service deferred revenue fair value adjustment192 1,199 
Share-based compensation expense51,892 50,861 56,328 
Amortization of acquired intangible assets80,189 89,479 105,543 
Business development and integration expense373 874 
New standard implementation expense— 914 
Compensation for post-combination services251 578 789 
Restructuring charges62 2,674 18,693 
Impairment of intangible assets— — 35,871 

36


Acquisition-related depreciation expense242 312 905 
Loss on divestiture— — 9,472 
Transitional service agreement income— — (45)
Change in contingent consideration— 762 1,495 
Legal judgments expense2,804 — — 
Income tax adjustments(28,977)(23,415)(49,877)
Non-GAAP net income$125,823 $119,067 $109,228 
GAAP diluted net income (loss) per share$0.26 $(0.04)$(0.93)
Per share impact of non-GAAP adjustments identified above1.44 1.61 2.31 
Non-GAAP diluted net income per share$1.70 $1.57 $1.38 
GAAP income (loss) from operations$37,130 $17,638 $(71,580)
Previous adjustments to determine non-GAAP income from operations135,663 145,686 233,165 
Non-GAAP income from operations172,793 163,324 161,585 
Depreciation excluding acquisition related25,397 26,313 31,430 
Non-GAAP EBITDA from operations$198,190 $189,637 $193,015 

Impairment of intangible assets35,871
 
 
Acquisition-related depreciation expense905
 2,057
 3,136
Loss on divestiture9,472
 
 
Other income
 (57) (426)
Transitional service agreement income(45) 
 
Change in contingent consideration1,495
 
 
Income tax adjustments(49,877) (142,546) (67,662)
Non-GAAP net income$109,228
 $124,664
 $178,546
      
GAAP diluted net income (loss) per share$(0.93) $0.90
 $0.36
Per share impact of non-GAAP adjustments identified above2.31
 0.51
 1.56
Non-GAAP diluted net income per share$1.38
 $1.41
 $1.92
      
GAAP income (loss) from operations$(71,580) $(4,058) $62,064
Previous adjustments to determine non-GAAP income from operations233,165
 187,455
 213,343
Non-GAAP income from operations161,585
 183,397
 275,407
Depreciation excluding acquisition related31,430
 37,474
 34,131
Non-GAAP EBITDA from operations$193,015
 $220,871
 $309,538

Critical Accounting Policies
We consider accounting policies related to revenue recognition, marketable securities, valuation of goodwill, intangible assets and other acquisition and divestiture accounting items, and share basedshare-based compensation to be critical in fully understanding and evaluating our financial results. We apply significant judgment and create estimates when applying these policies.
Revenue Recognition
We exercise judgment and use estimates in connection with determining the amounts of product and servicesservice revenues to be recognized in each accounting period.
We derive revenues primarily from the sale of network management tools and security solutions for service provider and enterprise customers, which include hardware, software, and service offerings. The majority of ourOur product sales consist of software only offerings and offerings which include hardware productsappliances with embedded software that are essential to providing customers the intended functionality of the solutions. We also sell software offerings decoupled from the underlying hardware and software solutions to provide customers with enhanced functionality.
We account for revenue once a legally enforceable contract with a customer has been approved by the parties and the related promises to transfer products or services have been identified. A contract is defined toby us as an arrangement with commercial substance identifying payment terms, each party’s rights and obligations regarding the products or services to be transferred and the amount we deem probable of collection. Customer contracts may include promises to transfer multiple products and services to a customer. Determining whether the products and services are considered distinct performance obligations that should be accounted for separately or as one combined performance obligation may require significant judgment. Revenue is recognized when control of the products or services are transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for products and services.
Product revenue is typically recognized upon shipment, provided a legally enforceable contract exists, control has passed to the customer, and in the case of software products, when the customer has the rights and ability to access the software,software; and collection of the related receivable is probable. If any significant obligations to the customer remain post-delivery, typically involving obligations relating to installation and acceptance by the customer, revenue recognition is deferred until such obligations have been fulfilled. Our service offerings include installation, integration, extended warranty and maintenance services, post-contract customer support, stand-ready software-as-a-service (SAAS) and other professional services including consulting and training. We generally provide software and/or hardware support as part of product sales. Revenue related to the initial bundled software and hardware support is recognized ratably over the support period. In addition, customers can elect to purchase extended support agreements for periods after the initial software/hardware warranty expiration. Support services generally include rights to unspecified upgrades (when and if available), telephone and internet-based support, updates, bug fixes and hardware repair and replacement. Consulting services are recognized upon delivery or completion of performance

depending on the terms of the underlying contract. Reimbursements of out-of-pocket expenditures incurred in connection with
37

providing consulting services are included in services revenue, with the offsetting expense recorded in cost of service revenue. Training services include on-site and classroom training. Training revenues are recognized upon delivery of the training.
Generally, our contracts are accounted for individually. However, when contracts are closely interrelated and dependent on each other, it may be necessary to account for two or more contracts as one to reflect the substance of the group of contracts.
Bundled arrangements are concurrent customer purchases of a combination of our product and service offerings that may be delivered at various points in time. We allocate the transaction price among the performance obligations in an amount that depicts the relative standalone selling prices (SSP) of each obligation. Judgment is required to determine the SSP for each distinct performance obligation. We use a range of amounts to estimate SSP when we sell each of the products and services separately based on the element’s historical pricing. We also consider our overall pricing objectives and practices across different sales channels and geographies, and market conditions. Generally, we have established SSP for a majority of our service elements based on historical standalone sales. In certain instances, we have established SSP for services based upon an estimate of profitability and the underlying cost to fulfill those services. Further, for certain service engagements, we consider quoted prices as part of multi-element arrangements of those engagements as a basis for establishing SSP. SSP has been established for product elements as the average or median selling price the element was recently sold for, whether sold alone or sold as part of a multiple element transaction. We review sales of the product elements on a quarterly basis and update, when appropriate, SSP for such elements to ensure that it reflects recent pricing experience. Our products are distributed through our direct sales force and indirect distribution channels through alliances with resellers and distributors. Revenue arrangements with resellers and distributors are recognized on a sell-in basis; that is, when control of the product transfers to the reseller or distributor. We record consideration given to a reseller or distributorcustomer as a reduction of revenue to the extent we have recorded revenue from the reseller or distributor.customer. With limited exceptions, our return policy does not allow product returns for a refund. Returns have been insignificant to date. In addition, we have a history of successfully collecting receivables from our resellers and distributors.
Marketable Securities
We measure the fair value of our marketable securities at the end of each reporting period. Fair value is defined as the exchange price that would be received for an asset in the principal or most advantageous market for the asset in an orderly transaction between market participants on the measurement date. Marketable securities are recorded at fair value and have been classified as Level 1 or 2 within the fair value hierarchy. Fair values determined by Level 1 inputs utilize quoted prices (unadjusted) in accessible active markets for identical assets or liabilities. Fair values determined by Level 2 inputs utilize data points that are observable such as quoted prices, interest rates and yield curves.
Valuation of Goodwill, Intangible Assets and Other Acquisition and Divestiture Accounting Items
We amortize acquired definite-lived intangible assets over their estimated useful lives. Goodwill and other indefinite-lived intangible assets are not amortized but subject to annual impairment tests; more frequently if events or circumstances occur that would indicate a potential decline in their fair value. We perform the assessment annually during the fourth quarter and on an interim basis if potential impairment indicators arise.
Reporting units are determined based on the components of a company's operating segments that constitute a business for which financial information is available and for which operating results are regularly reviewed by segment management. We have identified twoone reporting units: (1) Service Assurance and (2) Security.unit.
To test impairment, we first assess qualitative factors to determine whether the existence of events and circumstances indicate that it is more likely than not that the intangible asset is impaired. If based on our qualitative assessment it is more likely than not that the fair value of the intangible asset is less than its carrying amount, quantitative impairment testing is required. However, if we conclude otherwise, quantitative impairment testing is not required. During the fourth quarter of fiscal year 2019,2021, we performed a quantitativeour annual impairment analysis for goodwill. We determinedgoodwill at January 31, 2021 using the qualitative Step 0 assessment as we concluded that it was more likely than not that the fair value of the reporting unit's goodwill using established income and market valuation approaches. Goodwill was estimated to be recoverable as of January 31, 2019.unit exceeded its carrying value.
Indefinite-lived intangible assets are tested for impairment at least annually, or on an interim basis if an event occurs or circumstances change that would, more likely than not, reduce the fair value of the indefinite-lived intangible assets below its carrying value. To test impairment, we first assess qualitative factors to determine whether the existence of events and circumstances indicate that it is more likely than not that the indefinite-lived intangible is impaired. If based on our qualitative assessment, we conclude that it is more likely than not that the fair value of the indefinite-lived asset is greaterless than its carrying amount, quantitative impairment testing is required. However, if we conclude otherwise, quantitative impairment testing is not required. WeDuring the fourth quarter of fiscal year 2021, we completed our annual impairment test of the indefinite-lived intangible asset at January 31, 20192021 using the qualitative Step 0 assessment. No impairment indicators were observedassessment as we concluded that it was more likely than not that the fair value of January 31, 2019.the indefinite-lived asset exceeded its carrying value.

38


We completed two acquisitions and one divestiture during the three-year period ended March 31, 2019.2021. The acquisition method of accounting requires an estimate of the fair value of the assets and liabilities acquired as part of these transactions. In order to estimate the fair value of acquired intangible assets, we use a relief from royalty model which requires management to estimate: future revenues expected to be generated by the acquired intangible assets, a royalty rate which aeither an income, market participant would payor cost method approach.
Our Level 3 liabilities at March 31, 2020 consisted of contingent purchase consideration related to the projected revenue stream, a present value factor which approximates a risk adjusted rate of return for a market participant purchasing the assets, and a technology migration curve representing a period of time over which the technology assets or some portion thereof are still being used. We are also required to develop the fair value for customer relationships acquired as part of these transactions which requirestwo acquisitions that we create estimates for the following items: a projection of future revenues associated with the acquired company's existing customers, a turnover rate for those customers, a marginoccurred during fiscal year 2020. The contingent purchase consideration related to those sales,the two acquisitions represent amounts deposited into escrow accounts, which were established to cover damages NetScout may have suffered related to any liabilities that NetScout did not agree to assume or as a result of the breach of representations and a risk adjusted ratewarranties of return for a market participant purchasing those relationships.the sellers as described in the acquisition agreements. The contingent purchase consideration of $0.7 million and $1.0 million related to the Gigavation Incorporated (Gigavation) and Eastwind Networks, Inc. (Eastwind) acquisitions, respectively are included as accrued other in our consolidated balance sheet at March 31, 2020. The $0.7 million of purchase consideration related to the Gigavation acquisition was paid to the seller in February 2021. The contingent purchase consideration related to the Eastwind acquisition was paid to the seller in April 2020.
We haveDuring fiscal year 2019, we recorded a contingent consideration asset related to the divestiture of our handheld network test (HNT) tools business in September 2018. The contingent consideration asset representsrepresented potential future earnout payments to us of up to $4.0 million over two years that arewere contingent on the HNT tools business achieving certain milestones. The fair value of the contingent consideration of $2.3 million was recognized on the acquisitiondivestiture date and was measured using observableunobservable (Level 3) inputs. TheWe recorded an $0.8 million and a $1.6 million change in the fair value of the contingent consideration, asset atwhich is included in other expense, net within our consolidated statement of operations for the years ended March 31, 2019 was $0.8 million.
We had a contingent liability at March 31, 2018 for $523 thousand related to the acquisition of Efflux Systems, Inc. (Efflux) in July 2017 for which an escrow account was established to cover damages we may have suffered related to any liabilities that we did not agree to assume or as a result of the breach of representations2020 and warranties of the seller as described in the merger agreement. The $523 thousand was paid to the seller in July 2018.
We had a contingent liability at March 31, 2018 for $4.9 million related to the acquisition of Simena LLC (Simena) in November 2011, which was based on the ultimate settlement of assets and liabilities acquired as part of the transaction, and the former owners' future period of employment with us. The contingent purchase consideration of $5.0 million was paid to the seller in November 2018.
We had $660 thousand of contingent purchase consideration related to the acquisition of Avvasi Incorporated (Avvasi) in August 2016 for which an escrow account was established to cover damages we may have suffered related to any liabilities that we did not agree to assume or as a result of the breach of representations and warranties of the seller as described in the asset purchase agreement. The $660 thousand was paid to the seller in August 2017.2019.
Share-Based Compensation
We recognize compensation expense for all share-based payments. Under the fair value recognition provisions, we recognize share-based compensation net of an estimated forfeiture rate and only recognize compensation cost for those shares expected to vest on a straight-line basis over the requisite service period of the award.
We are required to estimate the expected forfeiture rate and only recognize expense for those shares expected to vest. If our actual forfeiture rate is materially different from our estimate, the share-based compensation expense could be significantly different from what we have recorded in the current period.
Based on historical experience, we assumed an annualized forfeiture rate of 0% for awards granted to our directors, an annualized forfeiture rate of approximately 2% for awards granted to our senior executives, and an annualized forfeiture rate of approximately 5% for all remaining employees. We will record additional expense if the actual forfeitures are lower than estimated and will record a recovery of prior expense if the actual forfeitures are higher than estimated.


39


Results of Operations
Comparison of Years Ended March 31, 2021 and 2020
The sections that follow discuss our consolidated statement of operations data for the fiscal years ended March 31, 2021 and March 31, 2020 including results as a percentage of revenue for those periods. For a discussion of (i) our consolidated statement of operations data for the fiscal year ended March 31, 2019 including results as a percentage of revenue for that period, as well as (ii) our liquidity and 2018capital resources for the fiscal year ended March 31, 2019, see "Comparison of Years Ended March 31, 2020 and 2019" and "Liquidity and Capital Resources" in Part II, Item 7 of our Annual Report on Form 10-K for the fiscal year ended March 31, 2020, filed with the SEC on May 20, 2020 (our 2020 Annual Report).
Results of Operations
Revenue
Product revenue consists of sales of our hardware products and licensing of our software products. Service revenue consistsconsists of customer support agreements, consulting, training and stand-ready software as a service offerings. During the fiscal years ended March 31, 20192021 and 2018,2020, no direct customer or indirect channel partner accounted for more than 10% of our total revenue.
 Fiscal Year Ended March 31,
(Dollars in Thousands)
  
 20212020Change
  % of
Revenue
 % of
Revenue
$%
Revenue:
Product$377,721 45 %$438,341 49 %$(60,620)(14)%
Service453,561 55 453,479 51 82 — %
Total revenue$831,282 100 %$891,820 100 %$(60,538)(7)%
 
Fiscal Year Ended March 31,
(Dollars in Thousands)
    
 2019 2018 Change
   
% of
Revenue
   
% of
Revenue
 $ %
Revenue:           
Product$467,289
 51% $520,418
 53% $(53,129) (10)%
Service442,629
 49
 466,369
 47
 (23,740) (5)%
Total revenue$909,918
 100% $986,787
 100% $(76,869) (8)%

Product. The 10%14%, or $53.1$60.6 million, decrease in product revenue compared with the same period last year was primarily due to a decrease in revenue from network performance management offerings for enterprise and service provider customers, for both the service assurance and security offerings, as well as lower enterprise-related product revenue tied to the divestiture of the HNT tools business.
Service. The 5%, or $23.7 million,a decrease in service revenue compared to the same period last year was primarily due to lower professional services revenue, a reduction of support renewals on non-core product lines, as well as the divestiture of the HNT tools business.from DDoS offerings.
Total revenue by geography is as follows:
 
Fiscal Year Ended March 31,
(Dollars in Thousands)
     Fiscal Year Ended March 31,
(Dollars in Thousands)
  
2019 2018 Change
20212020Change
  
% of
Revenue
   
% of
Revenue
 $ %  % of
Revenue
 % of
Revenue
$%
United States$553,267
 61% $581,853
 59% $(28,586) (5)%United States$484,129 58 %$545,620 61 %$(61,491)(11)%
International:           International:
Europe148,036
 16
 174,445
 18
 (26,409) (15)%Europe160,372 19 154,510 17 5,862 %
Asia72,355
 8
 88,917
 9
 (16,562) (19)%Asia56,562 59,939 (3,377)(6)%
Rest of the world136,260
 15
 141,572
 14
 (5,312) (4)%Rest of the world130,219 16 131,751 15 (1,532)(1)%
Subtotal international356,651
 39
 404,934
 41
 (48,283) (12)%Subtotal international347,153 42 346,200 39 953 — %
Total revenue$909,918
 100% $986,787
 100% $(76,869) (8)%Total revenue$831,282 100 %$891,820 100 %$(60,538)(7)%
United States revenue decreased 5%11%, or $28.6$61.5 million, primarily due to declinesa decrease in bothrevenue from network performance management offerings for enterprise and service assurance and cybersecurity products, as well as the divestiture of the HNT tools business.provider customers. International revenue decreased 12%, or $43.8increased $1.0 million primarily due to declinesdriven by an increase in both service assurance and cybersecurity products, as well as the divestiture of the HNT tools business.revenue from network performance management offerings.

40


Cost of Revenue and Gross Profit
Cost of product revenue consists primarily of material components, manufacturing personnel expenses, packaging materials, overhead and amortization of capitalized software, acquired developed technology and core technology. Cost of service revenue consists primarily of personnel, material, overhead and support costs.
 
 Fiscal Year Ended March 31,
(Dollars in Thousands)
Change
  
20212020
  % of
Revenue
 % of
Revenue
$%
Cost of revenue:
Product$95,965 12 %$122,832 14 %$(26,867)(22)%
Service126,132 15 119,360 13 6,772 %
Total cost of revenue$222,097 27 %$242,192 27 %$(20,095)(8)%
Gross profit:
Product $$281,756 34 %$315,509 35 %$(33,753)(11)%
Product gross profit %75 %72 %%
Service $$327,429 39 %$334,119 37 %$(6,690)(2)%
Service gross profit %72 %74 %(2)%
Total gross profit $$609,185 $649,628 $(40,443)(6)%
Total gross profit %73 %73 %— %
 
Fiscal Year Ended March 31,
(Dollars in Thousands)
 Change
  
2019 2018 
   
% of
Revenue
   
% of
Revenue
 $ %
Cost of revenue:           
Product$140,938
 16% $158,628
 16% $(17,690) (11)%
Service113,189
 12
 113,277
 12
 (88)  %
Total cost of revenue$254,127
 28% $271,905
 28% $(17,778) (7)%
Gross profit:           
Product $$326,351
 36% $361,790
 37% $(35,439) (10)%
Product gross profit %70%   70%    %  
Service $329,440
 36% 353,092
 36% (23,652) (7)%
Service gross profit %74%   76%   (2)%  
Total gross profit $$655,791
   $714,882
   $(59,091) (8)%
Total gross profit %72%   72%    %  
Product. The 11%22%, or $17.7$26.9 million, decrease in cost of product revenue compared to the same period last year was primarily due to a $17.8$16.2 million decrease in direct material costs due to shifts in product mix and thea decrease in product revenue, a $6.4$6.0 million decrease in the amortization of intangible assets, a net $6.3$4.7 million decrease in inventory obsolescence charges, a $1.2 million decrease in employee-related expenses associated withlargely due to the timing of certain projects partially offset by an increase in variable incentive compensation, a $0.8 million decrease in overhead costs, a $0.6 million decrease in shipping costs, and a $0.6 million decrease in shipping costs.supplies. These decreases were partially offset by an $11.6a $2.5 million increase in costs to deliver model calibration products and a $1.8 million increase in capitalized overhead costs.contractor fees. The product gross profit percentage remained flat at 70%increased by three percentage points to 75% during the fiscal year ended March 31, 20192021 as compared to the same period in the prior year. The 10%11%, or $35.4$33.8 million, decrease in product gross profit, corresponds with the 10%14%, or $53.1$60.6 million, decrease in product revenue, partially offset by the 11%22%, or $17.7$26.9 million, decrease in cost of product.product revenue.
Service. The $0.16%, or $6.8 million, decreaseincrease in cost of service revenue compared to the same period last year was primarily due to a $5.0 million increase in employee-related expenses due to an $8.5increase in variable incentive compensation and the timing of certain projects, and a $2.2 million decreaseincrease in contractor fees,fees. These increases were partially offset by a $2.0 million decrease in travel expenses, and a $1.7 million decrease in expenses associated with the timing of certain projects. These decreases were almost entirely offset with a net $12.0 million increase in employee-related expenses associated with the timing of certain projects as well as an increase in variable incentive compensation partially offset by a decrease dueexpense primarily attributable to a reduction in headcount as a result of the voluntary separation program.COVID-19 related restrictions. The serviceservice gross profit percentagepercentage decreased by two percentagepercentage points to 74%72% during the fiscal year ended March 31, 20192021 compared to the fiscal year ended March 31, 2018.2020. The 7%2%, or $23.7$6.7 million, decrease in service gross profit corresponds with the 5%6%, or $23.7$6.8 million, decreaseincrease in service revenue,cost of services, partially offset by the $0.1 million decreaseincrease in cost of services.service revenue.
Gross profit. Our gross profit decreased 8%6%, or $59.1$40.4 million, compared to the fiscal year ended March 31, 2018.2020. This decrease is attributable to the 8%7%, or $76.9$60.5 million, decrease in revenue partially offset by a $17.8the $20.1 million, or 7%8%, decrease in cost of revenue. The gross margin percentage remained flat at 72%73% during the fiscal year ended March 31, 20192021 compared to the same period in the prior year.

41


Operating Expenses
 Fiscal Year Ended March 31,
(Dollars in Thousands)
Change
 20212020
  % of
Revenue
 % of
Revenue
$%
Research and development$179,163 22 $188,294 21 %$(9,131)(5)%
Sales and marketing242,730 29 276,523 31 (33,793)(12)%
General and administrative88,969 11 99,994 11 (11,025)(11)%
Amortization of acquired intangible assets61,131 64,505 (3,374)(5)%
Restructuring charges62 — 2,674 — (2,612)(98)%
Total operating expenses$572,055 69 %$631,990 70 %$(59,935)(9)%
 
Fiscal Year Ended March 31,
(Dollars in Thousands)
 Change
 2019 2018 
   
% of
Revenue
   
% of
Revenue
 $ %
Research and development$203,588
 22% $215,076
 22% $(11,488) (5)%
Sales and marketing291,870
 32
 312,536
 32
 (20,666) (7)%
General and administrative93,572
 10
 109,479
 11
 (15,907) (15)%
Amortization of acquired intangible assets74,305
 8
 76,640
 8
 (2,335) (3)%
Restructuring charges18,693
 2
 5,209
 1
 13,484
 259 %
Impairment of intangible assets35,871
 4
 
 
 35,871
 100 %
Loss on divestiture of business9,472
 1
 
 
 9,472
 100 %
Total operating expenses$727,371
 79% $718,940
 74% $8,431
 1 %
Research and development. Research and development expenses consist primarily of personnel expenses, fees for outside consultants, overhead and related expenses associated with the development of new products and the enhancement of existing products.
The 5%, or $11.5$9.1 million, decrease in researchresearch and development expenses compared to the same period last year was primarily due to a net $4.5 million decrease in employee-related expense due to lower headcount partially offset by an increase in incentive compensation, a $4.3 million decrease in consulting fees, a $3.4 million decrease from depreciation expense and a $1.0$2.6 million decrease in travel expenses. These decreases were partially offset byexpense primarily attributable to COVID-19 related restrictions, a $1.7$2.0 million increasedecrease in depreciation expense, a $1.2 million decrease in rent and other facilities related expenses, associated with the timing of certain projects.and a $0.9 million decrease in contractor fees.
Sales and marketing. Sales and marketing expenses consist primarily of personnel expenses and commissions, overhead and other expenses associated with selling activities and marketing programs such as trade shows, seminars, advertising, and new product launch activities.
The 7%12%, or $20.7$33.8 million, decrease in total sales and marketing expenses compared to the same period last year was primarilyprimarily due to a net $12.2$17.3 million decrease in travel expense primarily attributable to COVID-19 related restrictions, a $6.9 million decrease in expenses related to trade shows, user conferences and other events attributable to continued cost control and COVID-19 related restrictions, a $5.1 million decrease in commissions expense, a $2.3 million decrease in advertising and other marketing related expenses, and a $2.2 million decrease in employee-related expenseexpenses due to lowera reduction in headcount, partially offset by an increase in variable incentive compensation, a $3.1 million decrease in trade shows and other events, a $2.4 million decrease in consulting fees, a $1.7 million decrease in travel expenses, a $1.4 million decrease in depreciation expense and a $1.0 million decrease in commissions expense. These decreases were partially offset by a $2.9 million increase in advertising expenses.compensation.
General and administrative. General and administrative expenses consist primarily of personnel expenses for executive, financial, legal, and human resource employees, overhead, and other corporate expenditures.
The 15%11%, or $15.9$11.0 million, decrease in generalgeneral and administrative expenses compared to the same period last year was primarily due to a $5.5$6.7 million decrease in legallegal-related expenses and penalties, a $3.6$1.6 million decrease in consulting fees,travel expense primarily attributable to COVID-19 related restrictions, a $2.7 million decrease in tax related items, a $2.0$1.0 million decrease in rent and other facilities related expenses, and a $1.5an $0.8 million decrease in business development expenses. These decreases were partially offset bycontractor fees, and a $2.0$0.5 million increasedecrease in employee-related expenses primarily due to an increase in variable incentive compensation.sales and use taxes.
Amortization of acquired intangible assets. Amortization of acquired intangible assets consists primarily of amortization of customer relationships, and definite-lived trademark and tradenames and leasehold interest related to the Comms Transaction, ONPATH Technologies, Inc., Simena, Psytechnics, Ltd, Network General Corporation, Avvasi Incorporated and Efflux.
The 3%5%, or $2.3$3.4 million, decrease in amortization of acquired intangible assets was largely due to a decreasereduction in the amortization of the intangible assets related to the divestiture of the HNT tools business in September 2018.Comms Transaction.
Impairment of intangible assets. During the first quarter of fiscal year 2019, we performed a quantitative analysis on certain intangible assets related to the HNT tools business. The fair value of these intangible assets was determined to be less than the carrying value, and as a result, we recognized an impairment charge of $35.9 million during the fiscal year ended March 31, 2019.


Restructuring. During fiscal yearyears 2020 and 2019, and 2018, we restructured certain departments to better align functions, drive productivity and improve efficiency. During the fiscal year ended March 31, 2019, we also implemented a voluntary separation program (VSP) for employees who met certain age and service requirements to reduce overall headcount. As a result of thethese restructuring programs, we recorded $18.7$0.1 million and $5.2$2.7 million of restructuring charges related to one-time termination benefits as well as facility-related charges during the fiscal years ended March 31, 20192021 and 2018,2020, respectively.
Loss
42

Interest and Other Expense, Net
Interest and other expense, net includes interest earned on our cash, cash equivalents and marketable securities, interest expense and other non-operating gains or losses.
 Fiscal Year Ended March 31,
(Dollars in Thousands)
Change
  
20212020
  % of
Revenue
 % of
Revenue
$%
Interest and other expense, net$(14,826)(2)%$(15,714)(2)%$888 %
 
Fiscal Year Ended March 31,
(Dollars in Thousands)
 Change
  
2019 2018 
   
% of
Revenue
   
% of
Revenue
 $ %
Interest and other expense, net$(21,332) (2)% $(14,601) (1)% $(6,731) (46)%
The 46%6%, or $6.7$0.9 million, increasedecrease in interest and other expense,expense, net was primarily due to a $13.3$9.7 million increasedecrease in interest expense due to additional amounts drawn downdebt repayments on the credit facility to fund the ASR as well as an increasea decrease in the average interest rate, on the credit facility and a $1.6$0.7 million increasedecrease in other expense due to thea change in the fair value of the contingent consideration related to the HNT tools business divestiture.divestiture recorded during the fiscal year ended March 31, 2020. These increasesdecreases were partially offset by a $3.4$4.8 million increase in foreign exchange expense, a $3.9 million decrease in interest income received on investments, and a $2.2$1.0 million increasedecrease in transitional services agreement income related to the HNT tools business divestiture, and a $2.2 million decrease in foreign exchange expense.divestiture.
Income Tax Expense
The annual effective tax rate for fiscal year 20192021 was 21.1%13.2%, compared to an annual effective tax rate of 527.7%243.1% for fiscal year 2018.2020. Generally, the effective tax rate differs from the statutory tax rate due to state income taxes and foreign withholding taxes, partially offset by the tax benefit associated with our domestic production activitiesForeign Derived Intangible Income deduction, foreign tax credits, research and development tax credits and earnings in jurisdictions subject to tax rates lower than the U.S. statutory rate. The provisions of the TCJA that affect the Company’s fiscal year 2019 tax rate include the Base Erosion Anti-Abuse Tax (BEAT), the deduction for Foreign Derived Intangible Income (FDII) and the Global Intangible Low Taxed Income (GILTI) inclusion.
The effective tax rate for the twelve months ended March 31, 20192021 is lower than the effective rate for the twelve months ended March 31, 2018, primarily due to the enactment of the TCJA during the prior fiscal year. As a result of the enactment, we recorded a significant tax benefit during the fiscal year ended March 31, 2018. This benefit has the effect of increasing the tax rate due to losses generated in the twelve months ended March 31, 2018.
There are several key provisions under the TCJA, which was enacted on December 22, 2017, that impact us. The final impact of the TCJA, as described below, did not differ from the estimates reported at December 31, 2017. The key changes from the TCJA that were reported as of March 31, 2019 are the impact due to the reduced U.S. Federal corporate tax rate from 35.0% to 21.0%, a one-time transition tax on certain foreign earnings on which U.S. income tax was deferred, additional tax expense under BEAT, a deduction for FDII, an income inclusion under GILTI and the repeal of the domestic production activity deduction.
We are required to record deferred tax assets and liabilities based on the enacted tax rate which they are expected to reverse in the future. Therefore, any U.S. related deferred taxes were re-measured from 35.0% down to 21.0% based on the recorded balances. As of December 31, 2017, we recorded an estimate related to the re-measurement of our deferred tax balances, which was a benefit of approximately $87 million. During the third quarter of the current fiscal year we finalized our calculation and did not adjust our estimate recorded. 
Additionally, we are required to calculate a one-time transition tax based on our total post-1986 foreign subsidiaries' earnings and profits that were previously deferred from U.S. income taxes. As of December 31, 2017, we recorded an estimate related to this one-time transition charge of approximately $2 million. During the third quarter of the current fiscal year we finalized our calculation and did not adjust our estimate recorded. 
We are subject to the tax on the Global Intangible Low-Taxed Income (GILTI). We are required to make an accounting policy election of either (1) treating taxes due on future U.S. inclusions in taxable income related to GILTI as a current period


expense when incurred (the "period cost method") or (2) factoring such amounts into our measurement of our deferred taxes (the "deferred method"). We have elected to treat taxes due on future U.S. inclusions in taxable income related to GILTI as a current period expense when incurred (the "period cost method").
As a result of TCJA we expect that current and future foreign earnings may be repatriated tax efficiently. After fully assessing the impact of the TCJA, we have determined that our current and future foreign earnings will not be indefinitely reinvested where we can repatriate those earnings in a tax efficient manner acceptable to management and which comply with local statutory and operational requirements. Additionally, we intend a one-time repatriation of certain previously taxed historical earnings because of TCJA which can be repatriated in a tax efficient manner. We continue to assert that any remainder of its historical book basis in excess of tax basis will be permanently reinvested. It is not practicable to estimate the amount of unrecognized deferred U.S. taxes on these differences.

 
Fiscal Year Ended March 31,
(Dollars in Thousands)
 Change
  
2019 2018 
   
% of
Revenue
   
% of
Revenue
 $ %
Income tax benefit$(19,588) (2)% $(98,471) (10)% $78,883
 80%



Comparison of Years Ended March 31, 2018 and 2017
Revenue
During the fiscal year ended March 31, 2018, no direct customer or indirect channel partner accounted for more than 10% of our total revenue. During the fiscal year ended March 31, 2017, one direct customer, Verizon, accounted for more than 10% of total revenue, while no indirect channel partner accounted for more than 10% of total revenue.

 
Fiscal Year Ended March 31,
(Dollars in Thousands)
 Change
  
2018 2017 
   
% of
Revenue
   
% of
Revenue
 $ %
Revenue:           
Product$520,418
 53% $715,404
 62% $(194,986) (27)%
Service466,369
 47
 446,708
 38
 19,661
 4 %
Total revenue$986,787
 100% $1,162,112
 100% $(175,325) (15)%
Product. The 27%, or $195.0 million, decrease in product revenue compared with the same period last year was primarily due to the combination of lower product revenue from a large tier-one service provider, and to a lesser extent, lower-than expected orders for service assurance and DDoS offerings by other service providers primarily in North America, as well as lower product revenue from enterprise customers.
Service. The 4%, or $19.7 million, increase in service revenue compared to the same period last year was2020, primarily due to an increase in maintenance contracts.
Total revenue by geography is as follows:
 
Fiscal Year Ended March 31,
(Dollars in Thousands)
 Change
  
2018 2017 
   
% of
Revenue
   
% of
Revenue
 $ %
United States$581,853
 59% $722,440
 62% $(140,587) (19)%
International:           
Europe174,445
 18
 193,441
 17
 (18,996) (10)%
Asia88,917
 9
 95,735
 8
 (6,818) (7)%
Rest of the world141,572
 14
 150,496
 13
 (8,924) (6)%
Subtotal international404,934
 41
 439,672
 38
 (34,738) (8)%
Total revenue$986,787
 100% $1,162,112
 100% $(175,325) (15)%
United States revenue decreased 19%, or $140.6 million, primarily due to the decreaseforeign derived intangible income benefit, a reduction in revenue from service assurance products.


Cost of Revenue and Gross Profit
 
Fiscal Year Ended March 31,
(Dollars in Thousands)
    
 2018 2017 Change
   
% of
Revenue
   
% of
Revenue
 $ %
Cost of revenue:           
Product$158,628
 16% $233,275
 20% $(74,647) (32)%
Service113,277
 12
 112,864
 10
 413
  %
Total cost of revenue$271,905
 28% $346,139
 30% $(74,234) (21)%
Gross profit:           
Product $$361,790
 37% $482,129
 41% $(120,339) (25)%
Product gross profit %70%   67%   3%  
Service $353,092
 36% 333,844
 29% 19,248
 6 %
Service gross profit %76%   75%   1%  
Total gross profit $$714,882
   $815,973
   $(101,091) (12)%
Total gross profit %72%   70%   2%  
Product. The 32%, or $74.6 million, decrease in cost of product revenue was primarily due to a $62.7 million decrease in direct material costs due to shifts in product mix and the decrease in product revenue, a $3.7 million decrease in the amortization of intangibles, a $2.5 million decrease in employee-related expenses primarily due to a decrease in variable incentive compensation, a $2.3 million decrease in expenses related to the transitional service agreements related to the Comms Transaction, a $1.8 million decrease in capitalized overheadforeign withholding taxes, and a $1.7 million decreasesignificant increase in shipping costs. The product gross profit percentage increased by three percentage points to 70% during the fiscal year ended March 31, 2018pre-tax income as compared to the same period in the prior year. The 25%, or $120.3 million, decrease in product gross profit corresponds with the 27%, or $195.0 million decrease in product revenue, partially offset by the 32%, or $74.6 million decrease in cost of product.
Service. The $0.4 million increase in cost of service revenue was primarily due to a $2.0 million increase in contractor fees, and a $0.8 million increase in depreciation expense. These increases were partially offset by a $1.2 million decrease in expenses associated with certain projects, and a $1.1 million decrease in employee-related expenses primarily due to a decrease in variable incentive compensation. The service gross profit percentage increased by one percentage points to 76% for the twelve months ended March 31, 2018 compared to the twelve months ended March 31, 2017. The 6%, or $19.2 million, increase in service gross profit corresponds with the 4%, or $19.7 million, increase in service revenue, partially offset by the $0.4 million increase in cost of services.
Gross profit. Our gross profit decreased 12%, or $101.1 million. This decrease is attributable to our decrease in revenue of 15%, or $175.3 million, partially offset by a $74.2 million, or 21%, decrease in cost of revenue. The gross margin percentage increased two percentage points to 72% during the fiscal year ended March 31, 2018 compared to the same period in the prior year.
 Fiscal Year Ended March 31,
(Dollars in Thousands)
Change
  
20212020
  % of
Revenue
 % of
Revenue
$%
Income tax expense$2,952 — %$4,678 %$(1,726)(37)%
Operating Expenses
 
Fiscal Year Ended March 31,
(Dollars in Thousands)
    
 2018 2017 Change
   
% of
Revenue
   
% of
Revenue
 $ %
Research and development$215,076
 22% $232,701
 20% $(17,625) (8)%
Sales and marketing312,536
 32
 328,628
 28
 (16,092) (5)%
General and administrative109,479
 11
 118,438
 10
 (8,959) (8)%
Amortization of acquired intangible assets76,640
 8
 70,141
 6
 6,499
 9 %
Restructuring charges5,209
 1
 4,001
 
 1,208
 30 %
Total operating expenses$718,940
 74% $753,909
 64%
$(34,969) (5)%


Research and development. The 8%, or $17.6 million, decrease in research and development expenses compared to the same period last year was primarily due to a $13.5 million decrease in employee-related expenses largely due to a decrease in variable incentive compensation, a $5.3 million decrease in consulting fees, a $1.4 million decrease from depreciation expense and a $1.1 million decrease in compensation for post-combination services. These decreases were partially offset by a $2.2 million increase from capitalized software costs. During the fiscal year ended March 31, 2017, there were higher costs capitalized for software development.
Sales and marketing. The 5%, or $16.1 million, decrease in total sales and marketing expenses compared to the same period last year was primarily due to an $18.0 million decrease in commissions expense, a $5.8 million decrease in trade shows and other events, and a $1.4 million decrease in compensation for post-combination services. These decreases were partially offset by a $7.1 million increase in employee-related expenses and a $2.6 million increase in depreciation expense.
General and administrative. The 8%, or $9.0 million, decrease in general and administrative expenses compared to the same period last year was primarily due to a $9.5 million decrease in business development expenses, a $3.0 million decrease in employee-related expenses primarily due to a decrease in variable incentive compensation, a $1.9 million decrease in expenses related to the transitional services agreements related to the Comms Transaction and a $1.4 million decrease in legal expenses. These decreases were partially offset by a $2.8 million increase in consulting fees related to the implementation of new accounting standards, a $1.7 million increase in bad debt expense and a $1.7 million increase in rent expense.
Amortization of acquired intangible assets. The 9%, or $6.5 million, increase in amortization of acquired intangible assets was primarily due to an increase of $3.5 million due to the acceleration of certain intangibles related to the Comms Transaction, with the remaining increase due to changes in percentages of amortization related to the Comms Transaction.
Restructuring. During fiscal year 2018 and 2017, we restructured certain departments to better align functions, drive productivity and improve efficiency. As a result of the restructuring programs, we recorded $5.2 million and $4.0 million of restructuring charges related to costs to be paid to employees for one-time termination benefits as well as facility-related charges during the fiscal years ended March 31, 2018 and 2017, respectively.
Interest and Other Expense, Net
 
Fiscal Year Ended March 31,
(Dollars in Thousands)
    
 2018 2017 Change
   
% of
Revenue
   
% of
Revenue
 $ %
Interest and other expense, net$(14,601) (1)% $(9,879) (1)% $(4,722) (48)%
The 48%, or $4.7 million, increase in interest and other expense, net was primarily due to a $3.5 million increase in interest expense due to additional amounts drawn down on the credit facility entered into on January 16, 2018 as well as an increase in the average interest rate and a $1.6 million increase in foreign currency exchange expense.
Income Tax Expense
The annual effective tax rate for fiscal year 2018 was 527.7%, compared to an annual effective tax rate of 36.2% for fiscal year 2017. Generally, the effective tax rate differs from the statutory tax rate due to state income taxes and foreign withholding taxes, partially offset by the tax benefit associated with our domestic production activities deduction, research and development tax credits and earnings in jurisdictions subject to tax rates lower than the U.S. statutory rate. The effective tax rate for the twelve months ended March 31, 2018 was higher than the effective rate for the twelve months ended March 31, 2017, primarily due to the enactment of the TCJA during the fiscal year. As a result of the enactment, we recorded a significant tax benefit during the fiscal year ended March 31, 2018. This benefit has the effect of increasing the tax rate due to losses generated in the twelve months ended March 31, 2018.
 
Fiscal Year Ended March 31,
(Dollars in Thousands)
    
 2018 2017 Change
   
% of
Revenue
   
% of
Revenue
 $ %
Income tax expense (benefit)$(98,471) (10)% $18,894
 2% $(117,365) (621)%


Contractual Obligations
At March 31, 2019,2021, we had the following contractual obligations:
Payment due by period (Dollars in thousands)
Contractual ObligationsTotalLess than 1
year
1-3 years3-5 yearsMore than
5 years
Long-term debt obligations (1)$360,268 $5,713 $354,555 $— $— 
Unconditional purchase obligations (2)55,319 40,480 14,839 — — 
Operating lease obligations (3)85,745 14,085 23,189 19,185 29,286 
Pension benefit plan37,586 485 1,158 1,648 34,295 
Total contractual obligations$538,918 $60,763 $393,741 $20,833 $63,581 
Contractual ObligationsTotal Less than 1
year
 1-3 years 3-5 years More than
5 years
Long-term debt obligations (1)$640,059
 $23,765
 $47,400
 $568,894
 $
Unconditional purchase obligations (2)49,222
 43,639
 5,193
 390
 
Operating lease obligations (3)98,269
 16,102
 20,863
 17,307
 43,997
Pension benefit plan7,011
 382
 920
 1,148
 4,561
Total contractual obligations$794,561
 $83,888
 $74,376
 $587,739
 $48,558
(1)Includes estimated future interest at an interest rate of 1.61% for our outstanding term loan at March 31, 2021.
(2)Represents estimated open purchase orders to purchase inventory as well as commitments for products and services used in the normal course of business.
(3)We lease facilities under operating lease agreements extending through September 2030 for a total of $85.7 million.
At March 31, 2019,2021, we have also excluded long-term deferred revenue of $103.3 million as such amounts will be recognized as services are provided.
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At March 31, 2021, the total accrual of our retirement obligation for our chairman and CEO was $1.4 million. The payment stream for this retirement obligation is based upon the retirement date which is currently not determinable.
At March 31, 2021, the total amount of net unrecognized tax benefits for uncertain tax positions and the accrual for the related interest was $1.4$1.0 million. We are unable to make a reliable estimate when cash settlement, if any, will occur with a tax authority as the timing of examinations and ultimate resolution of those examinations is uncertain. We have also excluded long-term deferred revenue of $94.6 million as such amounts will be recognized as services are provided.
(1)Includes estimated future interest at an interest rate of 4.25% for our outstanding term loan at March 31, 2019.
(2)Represents estimated open purchase orders to purchase inventory as well as commitments for products and services used in the normal course of business.
(3)We lease facilities and certain equipment under operating lease agreements extending through September 2030 for a total of $98.3 million.
Off-Balance Sheet Arrangements
We do not have any off-balance sheet arrangements as defined in Item 303(a)(4)(ii) of Regulation S-K.
Commitment and Contingencies
We account for claims and contingencies in accordance with authoritative guidance that requires us to record an estimated loss from a claim or loss contingency when information available prior to issuance of our consolidated financial statements indicates that it is probable that a liability has been incurred at the date of the consolidated financial statements and the amount of the loss can be reasonably estimated. If we determine that it is reasonably possible, but not probable, that an asset has been impaired or a liability has been incurred, or if the amount of a probable loss cannot be reasonably estimated, then, in accordance with the authoritative guidance, we disclose the amount or range of estimated loss if the amount or range of estimated loss is material. Accounting for claims and contingencies requires us to use our judgment. We consult with legal counsel on those issues related to litigation and seek input from other experts and advisors with respect to matters in the ordinary course of business.
We have aAcquisition related- Our Level 3 liabilities at March 31, 2020 consisted of contingent purchase consideration asset related to the divestiture of our HNT tools business in September 2018.two acquisitions that occurred during the fiscal year 2020. The contingent purchase consideration asset represents potential future earnout payments to us of up to $4.0 million over two years that are contingent on the HNT tools business achieving certain milestones. The fair value of the contingent consideration of $2.3 million was recognized on the acquisition date and was measured using observable (Level 3) inputs. The contingent consideration asset at March 31, 2019 was $0.8 million.
We had a contingent liability at March 31, 2018 for $523 thousand related to the acquisition of Efflux in July 2017 fortwo acquisitions represented amounts deposited into escrow accounts, which an escrow account waswere established to cover damages we may have suffered related to any liabilities that we did not agree to assume or as a result of the breach of representations and warranties of the sellersellers as described in the merger agreement.acquisition agreements. The $523 thousandcontingent purchase consideration of $0.7 million and $1.0 million related to the Gigavation and Eastwind acquisitions were included as accrued other in our consolidated balance sheet at March 31, 2020. The $0.7 million related to the Gigavation acquisition was paid to the seller in July 2018.
We had a contingent liability at March 31, 2018 for $4.9February 2021. The $1.0 million related to the Eastwind acquisition of Simena in November 2011, which was based on the ultimate settlement of assets and liabilities acquired as part of the transaction, and the former owners' future period of employment with us. The contingent purchase consideration of $5.0 million was paid to the seller in November 2018.April 2020.
We had $660 thousandDuring fiscal year 2019, we paid $0.5 million and $5.0 million of contingent purchase considerationliabilities to the sellers of Efflux Systems, Inc. (Efflux) and Simena, LLC), respectively related to the acquisition of Avvasi in August 2016 for which an escrow account was established to cover damages we may have suffered related to any liabilities that we did not agree toprior acquisitions.

assume or as a result of the breach of representations and warranties of the seller as described in the asset purchase agreement. The $660 thousand was paid to the seller in August 2017.
Legal - From time to time, we are subject to legal proceedings and claims in the ordinary course of business. In the opinion of management, the amount of ultimate expense with respect to any current legal proceedings and claims, if determined adversely, will not have a material adverse effect on our financial condition, results of operations or cash flows.
As previously disclosed, in March 2016, Packet Intelligence LLC (Packet Intelligence or Plaintiff) filed a Complaint against usNetScout and two subsidiary entities in the United States District Court for the Eastern District of Texas asserting infringement of five United States patents. Plaintiff’sPlaintiff's Complaint alleged that legacy Tektronix GeoProbe products, including the G10 and GeoBlade products, infringed these patents. WeNetScout filed an Answer denying Plaintiff’s allegations and asserting that Plaintiff’sPlaintiff's patents were, among other things, invalid, not infringed, and unenforceable due to inequitable conduct. In October 2017, a jury trial was held to address the parties’ claims and counterclaims regarding infringement of three patents by the G10 and GeoBlade products, invalidity of these patents, and damages. On October 13, 2017, the jury rendered a verdict finding in favor of the Plaintiff and that Plaintiff was entitled to $3,500,000 for pre-suit damages and $2,250,000 for post-suit damages. The jury indicated that the awarded damages amounts were intended to reflect a running royalty. The Court also conducted a bench trial on whether these patents were unenforceable due to, among other things, inequitable conduct. In September 2018, the Court entered judgment and "enhanced" the jury verdict in the amount of $2.8 million as a result of a jury finding. The judgment also awards pre- and post- judgmentpost-judgment interest, and a running royalty on the G10 and GeoBlade products until the expiration of the patents at issue, the last date being June 2022. The Court denied the Plaintiff's motion for fees. Following the entry of final judgment, on June 12, 2019, we filed motionsour Notice of Appeal. On July 14, 2020, the Court of Appeals for judgment asthe Federal Circuit issued a matterdecision vacating the $3,500,000 pre-suit damages award, affirming the $2,250,000 post-suit damages award, and remanding to the district court to determine what, if any, enhancement should be awarded. On March 15, 2021, NetScout filed a petition for a writ of law, seekingcertiorari to both overturn the verdictUnited States Supreme Court, which was subsequently denied, challenging, among other issues, the basis for enhanced damages and the patentability of the claimed technology. NetScout continues to reduce damages. We haveavail itself of its legal options. NetScout has concluded that the risk of loss from this matterassociated with the post-suit damages award is currently neither remote nor probable,"probable" in accounting terms, regardless of the options NetScout may pursue, and therefore, under GAAP definitions,that the risk of loss associated with pre-suit damages is termed "reasonably possible". Therefore, accountingnow remote. Accounting rules require us to provide an estimate for the range of potential liability. WeNetScout currently estimateestimates that the estimated range of liability is between $0 and the aggregate amount awarded by the jury and the Court's awardsum of enhanced post-suit
44

damages, plus potential additional pre- and post-judgment interest amounts and costs and any royalties owed on post-trial sales of the accused G10 and GeoBlade products. We intendAny potential enhancement is not reasonably estimable but is likely within the range of $0 to continue to vigorously dispute Packet Intelligence’s claims including through appeal, if necessary.$2,800,000.
Warranty and Indemnification
- We warrant that our software and hardware products will substantially conform to the documentation accompanying such products on their original date of shipment. For software, which also includes firmware, the standard warranty commences upon shipment and generally expires 60 to 90 days thereafter. With regard to hardware, the standard warranty commences upon shipment and generally expires 60 days to 12 months thereafter. Additionally, this warranty is subject to various exclusions which include, but are not limited to, non-conformance resulting from modifications made to the software or hardware by a party other than NetScout; customers’customers' failure to follow our installation, operation or maintenance instructions; and events outside of our reasonable control. We also warrant that all support services will be performed in a good and workmanlike manner. We believe that our product and support service warranties are consistent with commonly accepted industry standards. Warranty cost information is presented and no material warranty costs are accrued since service revenue associated with warranty is deferred at the time of sale and recognized ratably over the warranty period.
Contracts that we enter into in the ordinary course of business may contain standard indemnification provisions. Pursuant to these agreements, we may agree to defend third party claims brought against a partner or direct customer claiming infringement of such third party’s (i) U.S. patent and/or European Union (EU), or other selected countries’countries' patents, (ii) Berne convention member country copyright, and/or (iii) U.S., EU, and/or other selected countries’ trademark or intellectual property rights. Moreover, this indemnity may require us to pay any damages awarded against the partner or direct customer in such type of lawsuit as well as reimburse the partner or direct customer for reasonable attorney’sattorney's fees incurred by them from the lawsuit.
We may also agree from time to time to provide other forms of indemnification to partners or direct customers, such as indemnification that would obligate us to defend and pay any damages awarded to a third party against a partner or direct customer based on a lawsuit alleging that such third party has suffered personal injury or tangible property damage legally determined to have been caused by negligently designed or manufactured products.
We have agreed to indemnify our directors and officers and our subsidiaries’subsidiaries' directors and officers if they are made a party or are threatened to be made a party to any proceeding (other than an action by or in the right of NetScout) by reason of the fact that the indemnified are agents of NetScout. The indemnity is for any and all expenses and liabilities of any type (including but not limited to, judgments, fines and amounts paid in settlement) reasonably incurred by the directors or officers in connection with the investigation, defense, settlement or appeal of such proceeding, provided they acted in good faith.

Liquidity and Capital Resources
Cash, cash equivalents and marketable securities consist of the following (in thousands):
At March 31,
(Dollars in Thousands)
At March 31,
(Dollars in Thousands)
2019 2018 2017 202120202019
Cash and cash equivalents$409,632
 $369,821
 $304,880
Cash and cash equivalents$467,176 $338,489 $409,632 
Short-term marketable securities76,344
 77,941
 137,892
Short-term marketable securities9,277 47,969 76,344 
Long-term marketable securities1,012
 
 21,933
Long-term marketable securities— 2,613 1,012 
Cash, cash equivalents and marketable securities$486,988
 $447,762
 $464,705
Cash, cash equivalents and marketable securities$476,453 $389,071 $486,988 
Cash, cash equivalents and marketable securities
At March 31, 20192021, cash, cash equivalents and marketable securities (current and non-current) totaled $487.0$476.5 million. This represents an increase of $87.4 million a $39.2 million increase from $447.8$389.1 million at March 31, 2018.2020. This increase was primarily due to $149.8$213.9 million in cash provided by operations during the fiscal year ended March 31, 2019, partially2021. This increase was offset by $50.0$100.0 million used to repay long-term debt, $23.4$13.3 million used for tax withholdings in connection with the vesting of restricted stock units, $12.0 million used for capital expenditures, $14.5$4.5 million used for purchases of intangible assets, and $3.3 million used to repurchase shares of our common stock and $11.9 million used for tax withholdings on restricted stock units.
Atduring the fiscal year ended March 31, 2019,2021.
At March 31, 2021, cash, short-term and long-term investments in the United States were $320.1were $328.8 million, while cash held outside of the United States was approximately $166.9$147.7 million.
45

Cash and cash equivalents were impacted by the following:
 Fiscal Year Ended March 31,
(Dollars in Thousands)
 202120202019
Net cash provided by operating activities$213,921 $225,023 $149,838 
Net cash provided by (used in) investing activities$24,698 $(4,309)$(26,252)
Net cash used in financing activities$(118,307)$(286,870)$(79,285)
 
Fiscal Year Ended March 31,
(Dollars in Thousands)
 2019 2018 2017 (1)
Net cash provided by operating activities$149,838
 $222,454
 $226,764
Net cash (used in) provided by investing activities$(26,252) $57,128
 $(41,621)
Net cash used in financing activities$(79,285) $(220,962) $(89,553)
(1) Represents cash flows as of March 31, 2017, recast to present our retrospective adoption of accounting guidance related to the presentation of the cash flow statement.


Net cash from operating activities
Fiscal year 20192021 compared to fiscal year 20182020
Cash provided by operating activities was $149.8$213.9 million during the fiscal year ended March 31, 2019,2021, compared to $222.5$225.0 million of cash provided by operating activities induring the fiscal year ended March 31, 2018.2020. This $72.7$11.1 million decrease was due in partpart to a $153.1$14.0 million decrease from deferred income taxes, $10.5 million decrease from deferred revenue, a larger net loss,$10.3 million decrease from depreciation and amortization expense, a $107.1$4.6 million unfavorable impactdecrease from accounts receivable, a $17.1$3.5 million decrease from inventories, a $2.4 million decrease from prepaid expenses and other assets, and a $15.6$0.9 million decrease from depreciationaccrued compensation and amortization.other expenses, and an $0.8 million decrease from the change in fair value of contingent and contractual liabilities. These decreases were partially offset by a $94.3$22.1 million increase from deferrednet income, taxes, a $37.7$7.6 million increase from accrued compensation and other expenses,income taxes payable, a $35.9 million increase due to the impairment of certain intangible assets, a $23.3$2.8 million increase from deferred revenue,operating lease liabilities, a $9.0 million increase from share based compensation expense associated with equity awards, a $7.7 million increase in loss on divestiture of business, a $5.1$2.6 million increase from accounts payable, and a $4.3$1.0 million increase from inventories, and a $2.1 million increase from income tax payable.share-based compensation. Accounts receivable days sales outstanding was 75 days at March 31, 2021 compared to 73 days at March 31, 2020 and 88 days at March 31, 2019 compared to 78 days at March 31, 2018 and 80 days at March 31, 2017.2019.
Fiscal year 2018 compared to fiscal year 2017Net cash from investing activities
 Fiscal Year Ended March 31,
(Dollars in Thousands)
 202120202019
Cash provided by (used in) investing activities included the following:
Purchase of marketable securities$(15,673)$(117,383)$(229,769)
Proceeds from maturity of marketable securities56,806 144,322 230,433 
Purchase of fixed assets(11,986)(19,922)(23,392)
Purchase of intangible assets(4,537)— — 
Payments related to the divestiture of business— — (3,293)
Acquisition of businesses, net of cash acquired— (11,347)— 
Decrease (increase) in deposits88 (31)(97)
Collection of contingent consideration— 52 — 
Capitalized software development costs— — (134)
$24,698 $(4,309)$(26,252)
Cash provided by operating activities was $222.5investing activities increased by $29.0 million to $24.7 million during the fiscal year ended March 31, 2018,2021, compared to $226.8 million of cash provided by operating activities in the fiscal year ended March 31, 2017. This $4.3 million decrease was due in part to a $116.8 million decrease from deferred income taxes, a $41.2 million decrease from deferred revenue, a $24.5 million decrease from accrued compensation and other expenses, a $21.9 million net decrease from amounts due to and from related parties, an $11.5 million decrease from inventories, a $9.3 million decrease from accounts payable, a $7.4 million decrease from depreciation and amortization, and a $4.7 million decrease from income taxes payable. These decreases were partially offset by a $133.0 million increase from accounts receivable, a $46.5 million increase from net income, a $44.9 million increase from prepaid expenses and other assets and an $8.1 million increase from share-based compensation expense


associated with equity awards. Accounts receivable days sales outstanding was 78 days at March 31, 2018 compared to 80 days at March 31, 2017.
Net cash from investing activities
 
Fiscal Year Ended March 31,
(Dollars in Thousands)
 2019 2018 
2017 (1)
Cash (used in) provided by investing activities included the following:     
Purchase of marketable securities$(229,769) $(114,178) $(199,841)
Proceeds from maturity of marketable securities230,433
 196,041
 181,321
Purchase of fixed assets(23,392) (15,913) (29,696)
Purchase of intangible assets
 (544) (1,031)
Payments related to the divestiture of business(3,293) 
 
Acquisition of businesses, net of cash acquired
 (8,334) (4,606)
(Increase) decrease in deposits(97) (330) 129
Contingent purchase consideration
 523
 660
Collection of contingently returnable consideration
 
 12,864
Capitalized software development costs(134) (137) (1,421)
 $(26,252) $57,128
 $(41,621)
(1) Represents cash flows as of March 31, 2017, recast to present our retrospective adoption of accounting guidance related to the presentation of the cash flow statement.

Cash used in investing activities increased by $83.4 million to $26.3 million during the fiscal year ended March 31, 2019, compared to $57.1 million of cash provided by investing activities during the fiscal year ended March 31, 2018. Cash provided by investing activities increased by $98.7 million to $57.1 million during the fiscal year ended March 31, 2018, compared to $41.6 million of cash used in investing activities during the fiscal year ended March 31, 2017.2020.
Net cash inflows relating to the purchase and sales of marketable securities decreased $81.2increased $14.2 million during the fiscal year ended March 31, 20192021 relating to the amount of investments held at each respective balance sheet date, from an inflow of $81.9 million during fiscal year ended March 31, 2018 to an inflow of $0.7 million during fiscal year ended March 31, 2019. Net cash inflows relating to the purchase and sales of marketable securities increased $100.4$26.9 million during the fiscal year ended March 31, 2018 relating2020 to the amountan inflow of investments held at each respective balance sheet date, from an outflow of $18.5$41.1 million during the fiscal year ended March 31, 2017 to an inflow of $81.9 million during2021.
During the fiscal yeartwelve months ended March 31, 2018.
2020, there was an $11.3 million cash outflow related to the acquisitions of Eastwind and Gigavation. During the twelve months ended March 31, 2019, there was a $3.3 million cash outflow related to the divestiture of HNT.
During the twelve monthsfiscal year ended March 31, 2018, there was an $8.3 million cash outflow related2021, we entered into agreements to the acquisition of Efflux. During the twelve months ended March 31, 2017, there was a $4.6 million cash outflow related to the acquisition of Avvasi.acquire technology licenses for $4.5 million.
Our investments in property and equipment consist primarily of computer equipment, demonstration units, office equipment and facility improvements. We plan to continue to invest in capital expenditures to support our infrastructure in our fiscal year 2020.
During the fiscal year ended March 31, 2019, we did not acquire any technology licenses. During the fiscal years ended March 31, 2018 and 2017, we entered into agreements to acquire technology licenses for $0.5 million and $1.0 million, respectively.2022.

46


Net cash from financing activities
 
Fiscal Year Ended March 31,
(Dollars in Thousands)
 2019 2018 
2017 (1)
Cash used in financing activities included the following:     
Issuance of common stock under stock plans$3
 $1
 $2
Payment of contingent consideration(2,851) (660) 
Treasury stock repurchases, including accelerated share repurchases(14,468) (501,324) (79,996)
Tax withholding on restricted stock units(11,969) (13,598) (9,559)
Proceeds from issuance of long-term debt, net of issuance costs
 294,619
 
Repayment of long-term debt(50,000) 
 
 $(79,285) $(220,962) $(89,553)
(1) Represents cash flows as of March 31, 2017, recast to present our retrospective adoption of accounting guidance related to the presentation of the cash flow statement.

 Fiscal Year Ended March 31,
(Dollars in Thousands)
 202120202019
Cash used in financing activities included the following:
Issuance of common stock under stock plans$$$
Payment of contingent consideration(1,748)— (2,851)
Treasury stock repurchases(3,275)(175,000)(14,468)
Tax withholding on restricted stock units(13,286)(11,872)(11,969)
Repayment of long-term debt(100,000)(100,000)(50,000)
$(118,307)$(286,870)$(79,285)
Cash used in financing activities decreased $141.7$168.6 million to $79.3$118.3 million during the fiscal year ended March 31, 2019,2021, compared to $221.0$286.9 million of cash used in financing activities during the fiscal year ended March 31, 2018.2020.
During the twelve months ended March 31, 2019, we repurchased 543,251 shares for $14.5 million under the twenty-five million share repurchase program. During the twelve months ended March 31, 2018, we repurchased 13,190,650 shares for $411.3 million under our stock repurchase and accelerated share repurchase (ASR) programs.
On February 1, 2018, we entered into ASR agreements with two third-party financial institutions to repurchase an aggregate of $300 million of our common stock via accelerated stock repurchase transactions under the twenty million share repurchase program and the twenty five million share repurchase program. We borrowed $300 million under our Amended Credit Agreement and made an up-front payment of $300 million pursuant to the ASR and received an initial delivery of 7,387,862 shares in the aggregate, which is approximately 70 percent of the total number of shares of our common stock expected to be repurchased under the ASR. As part of this purchase, 970,650 shares for $27.6 million were deducted under the twenty million share repurchase program and 6,417,212 shares for $182.4 million were deducted under the twenty five million share repurchase program. Final settlement of the ASR agreements was completed in August 2018. As a result, we received an additional 3,679,947 shares of common stock for $96.8 million, which reduced the number of shares available to be purchased from the twenty-five million share repurchase program during the fiscal year ended March 31, 2019. In total, 11,067,8092021, we paid $1.0 million of contingent purchase consideration related to the Eastwind acquisition in April 2020 and $0.7 million of contingent purchase consideration related to the Gigavation acquisition in February 2021.
During the fiscal years ended March 31, 2021, 2020 and 2019, we repurchased 154,271 shares, 7,116,159 shares and 543,251 shares of our common stock were repurchasedfor $3.3 million, $175.0 million, and $14.5 million under the ASR at an average cost perour twenty-five million share of $27.11.repurchase program.
In connection with the delivery of common shares upon vesting of restricted stock units, we have withheld 451,683506,917 shares for $13.3 million, 519,241 shares for $11.9 million 408,097and 451,683 shares for $13.6 million and 320,572 shares for $9.6$11.9 million related to minimum statutory tax withholding requirements on these restricted stock units during the fiscal years ended March 31, 2019, 20182021, 2020 and 2017,2019, respectively. These withholding transactions do not fall under the repurchase program described above, and therefore do not reduce the amount that is available for repurchase under that program.
During the fiscal yearyears ended March 31, 2021, 2020 and 2019, we repaid $100.0 million, $100.0 million and $50.0 million of borrowings under the Amended Credit Agreement.

Agreement, respectively.
Credit Facility
On January 16, 2018, we amended and expanded our existing credit agreement (Amended Credit Agreement) with a syndicate of lenders by and among: NetScout; JPMorgan Chase Bank, N.A. (JPMorgan), as administrative agent and collateral agent; J.P. Morgan Securities LLC, KeyBanc Capital Markets, Merrill Lynch, Pierce, Fenner & Smith Incorporated, RBC Capital Markets and Wells Fargo Securities, LLC, as joint lead arrangers and joint bookrunners; Fifth Third Bank, Santander Bank, N.A., SunTrust Bank, N.A. and U.S. Bank National Association, as co-documentation agents; and the lenders party thereto.

The Amended Credit Agreement provides for a five-year $1.0 billion senior secured revolving credit facility, including a letter of credit sub-facility of up to $75.0 million. We may elect to use the new credit facility for general corporate purposes or to finance the repurchase of up to twenty-five million shares of our common stock under our common stock repurchase plan. The commitments under the Amended Credit Agreement will expire on January 16, 2023, and any outstanding loans will be due on that date. During the fiscal year ended March 31, 2019,2021, we repaid $50.0$100.0 million of borrowings under the Amended Credit Agreement. At March 31, 2019, $5502021, $350 million was outstanding under the Amended Credit Agreement.
At our election, revolving loans under the Amended Credit Agreement bear interest at either (a) an Alternate Base Rate per annum equal to the greatest of (1) JPMorgan’sJPMorgan's prime rate, (2) 0.50% in excess of the New York Federal Reserve Bank (NYFRB) rate, or (3) an adjusted one month LIBOR rate plus 1%; or (b) such adjusted LIBOR rate (for the interest period selected by us), in each case plus an applicable margin. For the period from the delivery of our financial statements for the quarter ended December 31, 2018,2020, until we have delivered financial statements for the quarter ended March 31, 2019,2021, the applicable margin will be 1.75%1.50% per annum for LIBOR loans and 0.75%0.50% per annum for Alternate Base Rate loans, and thereafter the applicable margin will vary depending on our leverage ratio, ranging from 1.00%0.75% per annum for Base Rate loans and 2.00%1.75% per annum for LIBOR loans if our consolidated leverage ratio is greaterless than or equal to 3.50 to 1.00, down to 0.00% per annum for Alternate Base Rate loans and 1.00% per annum for LIBOR loans if our consolidated leverage ratio is equal to or less than 1.50 to 1.00. As of March 31, 2021, the Company’s maximum allowed consolidated leverage ratio is 3.50 to 1.00.
On July 27, 2017, the U.K. Financial Conduct Authority (FCA) announced that it will no longer require banks to submit rates for the calculation of LIBOR after 2021. On March 5, 2021, the Intercontinental Exchange Benchmark Administration
47

(IBA), the FCA-regulated and authorized administrator of LIBOR, announced, and the FCA confirmed, that one week and two-month USD LIBOR settings will cease on December 31, 2021, and that the USD LIBOR panel will cease on June 30, 2023. IBA notes that any publication of the Overnight and 1, 3, 6 and 12 Months USD LIBOR settings based on panel bank submissions beyond December 31, 2021 will need to comply with applicable regulations, including as to representativeness. Based on current information from panel banks, IBA anticipates there being a representative panel for the continuation of these USD LIBOR settings through to June 30, 2023.
Our Amended Credit Agreement, which matures on January 16, 2023 prior to the June 30, 2023 cessation of USD LIBOR publications, provides for the Administrative Agent to determine if (i) adequate and reasonable means do not exist for ascertaining the LIBOR rate or (ii) the FCA or Government Authority having jurisdiction over the Administrative Agent has made a public statement identifying a specific date after which the LIBOR rate shall no longer be used for determining interest rates for loans and the Administrative Agent determines that (i) and (ii) above are unlikely to be temporary, then the Administrative Agent and NetScout would agree to transition to an Alternate Base Rate Borrowingborrowing as described above or amend the Credit Agreement to establish an alternate rate of interest to LIBOR that gives due consideration to the then prevailing market convention for determining a rate of interest for syndicated loans in the United States at such time.
Our consolidated leverage ratio is the ratio of our total funded debt compared to our consolidated adjusted EBITDA. Consolidated adjusted EBITDA includes certain adjustments, including, without limitation, adjustments relating to extraordinary, unusual or non-recurring charges, certain restructuring charges, non-cash charges, certain transaction costs and expenses and certain pro forma adjustments in connection with material acquisitions and dispositions, all as set forth in detail in the definition of consolidated adjusted EBITDA in the Amended Credit Agreement.
Commitment fees will accrue on the daily unused amount of the credit facility. For the period from the delivery of our financial statements for the quarter ended December 31, 20182020 until we have delivered financial statements for the quarter ended March 31, 2019,2021, the commitment fee will be 0.30%0.25% per annum, and thereafter the commitment fee will vary depending on the our consolidated leverage ratio, ranging from 0.30% per annum if our consolidated leverage ratio is greater than 2.75 to 1.00, down to 0.15% per annum if our consolidated leverage ratio is equal to or less than 1.50 to 1.00.
Letter of credit participation fees are payable to each lender on the amount of such lender’s letter of credit exposure, during the period from the closing date of the Amended Credit Agreement to but excluding the date which is the later of (i) the date on which such lender’s commitment terminates or (ii) the date on which such lender ceases to have any letter of credit exposure, at a rate per annum equal to the applicable margin for LIBOR loans. Additionally, we will pay a fronting fee to each issuing bank in amounts to be agreed to between us and the applicable issuing bank.
Interest on Alternate Base Rate loans is payable at the end of each calendar quarter. Interest on LIBOR loans is payable at the end of each interest rate period or at the end of each three-month interval within an interest rate period if the period is longer than three months. We may also prepay loans under the Amended Credit Agreement at any time, without penalty, subject to certain notice requirements.
Debt is recorded at the amount drawn on the revolving credit facility plus interest based on floating rates reflective of changes in the market which approximates fair value.
The loans and other obligations under the credit facility are (a) guaranteed by each of our wholly owned material domestic restricted subsidiaries, subject to certain exceptions, and (b) are secured by substantially all of the assets of us and the subsidiary guarantors, including a pledge of all the capital stock of material subsidiaries held directly by us and the subsidiary guarantors (which pledge, in the case of any foreign subsidiary, is limited to 65% of the voting stock), subject to certain customary exceptions and limitations. The Amended Credit Agreement generally prohibits any other liens on the assets of NetScout and its restricted subsidiaries, subject to certain exceptions as described in the Amended Credit Agreement.
The Amended Credit Agreement contains certain covenants applicable to us and our restricted subsidiaries, including, without limitation, limitations on additional indebtedness, liens, various fundamental changes, dividends and distributions,


investments (including acquisitions), transactions with affiliates, asset sales, including sale-leaseback transactions, speculative hedge agreements, payment of junior financing, changes in business and other limitations customary in senior secured credit facilities. In addition, we are required to maintain certain consolidated leverage and interest coverage ratios. These covenants and limitations are more fully described in the Amended Credit Agreement. At March 31, 2019,2021, we were in compliance with all of these covenants.
The Amended Credit Agreement provides that events of default will exist in certain circumstances, including failure to make payment of principal or interest on the loans when required, failure to perform certain obligations under the Amended Credit Agreement and related documents, defaults under certain other indebtedness, certain insolvency events, certain events arising under ERISA, a change of control and certain other events. Upon an event of default, the administrative agent with the consent of, or at the request of, the holders of more than 50% in principal amount of the loans and commitments may terminate
48

the commitments and accelerate the maturity of the loans and enforce certain other remedies under the Amended Credit Agreement and the other loan documents.
In connection with NetScout's Amended Credit Agreement described above, we terminated our previous term loan dated as of July 14, 2015, by and among NetScout; JPMorgan Chase Bank, N.A. (JPMorgan), as administrative agent and collateral agent; J.P. Morgan Securities LLC, KeyBanc Capital Markets, Merrill Lynch, Pierce, Fenner & Smith Incorporated, RBC Capital Markets and Wells Fargo Securities, LLC, as joint lead arrangers and joint bookrunners; Santander Bank, N.A., SunTrust Bank, N.A. and U.S. Bank National Association, as co-documentation agents; and the lenders party thereto.
We have capitalized debt issuance costs totaling $12.2 million at March 31, 2019,2021, which are being amortized over the life of the revolving credit facility. The unamortized balance was $6.6$3.1 million as of March 31, 2019.2021. The balance of $1.7 million was included as prepaid expenses and other current assets and a balance of $4.9$1.4 million was includedincluded as other assets in our consolidated balance sheet.
Expectations for Fiscal Year 20202022
We are actively managing the business to maintain cash flow and believe that we currently have adequate liquidity. We believe that our cash balances, available debt, short-term marketable securities classified as available-for-sale and future cash flows generated by operationsthese factors will be sufficientallow us to meet our currently anticipated funding requirements.
We expect net cash needs forprovided by operating activities combined with cash, cash equivalents, and marketable securities and borrowing availability under our revolving credit facility to provide sufficient liquidity to fund current obligations, capital spending, debt service requirements and working capital and capital expenditures forrequirement over at least the next 12twelve months.
Additionally, a portion of our cash may be used to acquire or invest in complementary businesses or products, or to obtain the right to use complementary technologies.technologies, to repay borrowings under our Amended Credit Agreement, or to repurchase shares of our common stock through our stock repurchase program. From time to time, in the ordinary course of business, we evaluate potential acquisitions of such businesses, products or technologies. If our existing sources of liquidity are insufficient to satisfy our liquidity requirements, we may seek to sell additional equity or debt securities. The sale of additional equity or debt securities could result in additional dilution to our stockholders.
Recent Accounting Standards
For information with respect to recent accounting pronouncements on our consolidated financial statements, See Note 2 contained in the "Notes to Consolidated Financial Statements" included in Part IV of this Annual Report on Form 10-K.

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Item 7A. Quantitative and Qualitative Disclosures About Market Risk
Interest Rate Risk. We hold our cash, cash equivalents and investments for working capital purposes. Some of the securities we invest in are subject to market risk. This means that a change in prevailing interest rates may cause the principal amount of the investment to fluctuate. To minimize this risk, we maintain our portfolio of cash, cash equivalents and investments in a variety of securities, including money market funds and government debt securities. The risk associated with fluctuating interest rates is limited to our investment portfolio. Due to the short-term nature of these instruments, we believe that we do not have any material exposure to changes in the fair value of our investment portfolio as a result of changes in interest rates. Declines in interest rates, however, would reduce future interest income. The effect of a hypothetical 10% increase or decrease in overall interest rates would not have had a material impact on our operating results or the total fair value of the portfolio.
We are exposed to market risks related to fluctuations in interest rates related to our credit facility. As ofAt March 31, 2019,2021, we owed $550$350 million on this loan with an interest rate of 4.25%1.61%. A sensitivity analysis was performed on the outstanding portion of our debt obligation as of March 31, 2019.2021. Should the current weighted average interest rate increase or decrease by 10%, the resulting annual increase or decrease to interest expense would be approximately $2.3 million$564 thousand as of March 31, 2019.2021.
Credit Risk. Our cash equivalents and marketable securities consist primarily of money market instruments, U.S. Treasury bills, certificates of deposit, commercial paper, corporate bonds and municipal obligations.
At March 31, 20192021 and periodically throughout the year, we have maintained cash balances in various operating accounts in excess of federally insured limits. We limit the amount of credit exposure with any one financial institution by evaluating the creditworthiness of the financial institutions with which we invest.
Foreign Currency Exchange Risk. As a result of our foreign operations, we face exposure to movements in foreign currency exchange rates, primarily the Euro, British Pound, Canadian Dollar and Indian Rupee. The current exposures arise primarily from expenses denominated in foreign currencies. We currently engage in foreign currency hedging activities in order to limit these exposures. We do not use derivative financial instruments for speculative trading purposes.
At March 31, 2019,2021, we had foreign currency forward contracts designated as hedging instruments with notional amounts totaling $4.6$11.0 million and foreign currency forward contracts not designated as hedging instruments with a notional amount of $6.4 million. The valuation of outstanding foreign currency forward contracts (both designated and not designated as hedging instruments) at March 31, 20192021 resulted in a liability balance of $68$191 thousand, reflecting unfavorable contract rates in comparison to current market rates at this date and an asset balance of $58$57 thousand, reflecting favorable rates in comparison to current market rates. At March 31, 2018,2020, we had foreign currency forward contracts designated as hedging instruments with notional amounts totaling $11.2$1.7 million. The valuation of outstanding foreign currency forward contracts designated as hedging instruments at March 31, 20182020 resulted in a liability balance of $40$49 thousand, reflecting unfavorable contract rates in comparison to current market rates at this date and an asset balance of $122 thousand reflecting favorable rates in comparison to current market rates.date.

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Item 8. Financial Statements and Supplementary Data
Our Consolidated Financial Statements and Schedule and Report of Independent Registered Public Accounting Firm appear beginning on page F-1 attached to this report.
Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure
There have been no changes in or disagreements with accountants on accounting or financial disclosure matters.
Item 9A. Controls and Procedures
Evaluation of Disclosure Controls and Procedures
As of March 31, 2019,2021, NetScout, under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, evaluated the effectiveness of the design and operation of our disclosure controls and procedures pursuant to Rule 13a-15(b) promulgated under the Exchange Act. Based upon that evaluation, our principal executive officer and principal financial officer concluded that, as of March 31, 20192021 our disclosure controls and procedures were effective in ensuring that material information relating to NetScout, including its consolidated subsidiaries, required to be disclosed by NetScout in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, including ensuring that such material information is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure.
Changes in Internal Control over Financial Reporting
During the year quarter ended March 31, 2019,2021, there were no changes in our internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.


Management’s Report on Internal Control Over Financial Reporting
Our management is responsible for establishing and maintaining adequate internal control over financial reporting as such term is defined in Exchange Act Rule 13a-15(f). Our internal control over financial reporting was designed to provide reasonable assurance regarding reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate. Our management assessed the effectiveness of our internal control over financial reporting as of March 31, 2019.2021. In making this assessment, our management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control—Integrated Framework in 2013. Based on our assessment, we concluded that our internal control over financial reporting was effective as of March 31, 2019.2021.
The effectiveness of our internal control over financial reporting as of March 31, 20192021 has been audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm, as stated in their report which appears herein.
Item 9B. Other Information
Not applicable.

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PART III
Item 10. Directors, Executive Officers and Corporate Governance
The information required by this Item 10 will be included under the captions "Directors and Executive Officers," "Election"Proposal 1 Election of Directors," "Delinquent Section 16(a) Reports," "Code"Corporate Governance -- Code of Ethics," "The Board of Directors and its Committees" and "Corporate Governance" in our definitive Proxy Statement with respect to our 20192021 Annual Meeting of Stockholders to be filed with the SEC no later than 120 days after the end of the fiscal year covered by this Annual Report and is incorporated herein by reference.
Item 11. Executive Compensation
The information required by this Item 11 will be included under the caption "Compensation and Other Information Concerning Directors and Executive Officers" in our definitive Proxy Statement with respect to our 20192021 Annual Meeting of Stockholders to be filed with the SEC not later than 120 days after the end of the fiscal year covered by this Annual Report and is incorporated herein by reference.
Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters
The information required by this Item 12 will be included under the captions "Security Ownership of Certain Beneficial Owners and Management" and "Equity"Compensation and Other Information Concerning Directors and Executive Officers -- Equity Compensation Plan Information" in our definitive Proxy Statement with respect to our 20192021 Annual Meeting of Stockholders to be filed with the SEC not later than 120 days after the end of the fiscal year covered by this Annual Report and is incorporated herein by reference.
Item 13. Certain Relationships and Related Transactions, and Director Independence
The information required by this Item 13 will be included, as applicable, under the captions "Director"Corporate Governance --Director Independence," "Employment"Compensation and Other Information Concerning Directors and Executive Officers -- Employment and Other Agreements" and "Transactions with Related Persons" in our definitive Proxy Statement with respect to our 20192021 Annual Meeting of Stockholders to be filed with the SEC not later than 120 days after the end of the fiscal year covered by this Annual Report and is incorporated herein by reference.
Item 14. Principal AccountingAccountant Fees and Services
The information required by this Item 14 will be included under the captions "Auditors Fees and Services" and "Policy"Auditors Fees and Services -- Policy on Audit Committee Pre-approval of Audit and Non-Audit Services" in our definitive Proxy Statement with respect to our 20192021 Annual Meeting of Stockholders to be filed with the SEC not later than 120 days after the end of the fiscal year covered by this Annual Report and is incorporated herein by reference.

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PART IV
Item 15. Exhibits and Financial Statement Schedules
 
(a)1.Consolidated Financial Statements.
(a)1.Consolidated Financial Statements.
2.Financial Statement Schedule.
No other financial statement schedules have been included because they are either not applicable or the information is in the consolidated financial statements.
3.Exhibits listed in the accompanying Index to Exhibits are filed or incorporated by reference as part of this report.
(b)We hereby file as part of this Annual Report on Form 10-K the exhibits listed in Item 15(a)(3) above.
(c)We hereby file as part of this Annual Report on Form 10-K the financial statement schedule listed in Item 15(a)(2) above.



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NetScout Systems, Inc.
Index to Exhibits
 
Composite conformed copy of Third Amended and Restated Certificate of Incorporation of NetScout (as amended) (filed as Exhibit 3.2 to NetScout’s current report on Form 8-K, SEC File No. 000-26251, filed on September 21, 2016, and incorporated herein by reference).
Amended and Restated By-laws of NetScout (filed as Exhibit 3.1 to NetScout’s current Report on Form 8-K, SEC File No. 000-26251, filed on October 30, 2017May 11, 2020 and incorporated herein by reference).
Specimen Certificate for shares of NetScout’s Common Stock (filed as Exhibit 4.3 to NetScout’s Annual Report on Form 10-K for the fiscal year ended March 31, 2001, SEC File No. 000-26251, filed on June 29, 2001, and incorporated herein by reference).
Description of Common Stock (filed herewith)as Exhibit 4.4 to NetScout's Annual Report on Form 10-K for the fiscal year ended March 31, 2020, SEC File No. 000-26251, filed on May 20, 2020 and incorporated herein by reference).
Form of Amended and Restated Indemnification Agreement between NetScout and each director and executive officer filed as Exhibit 10.1 to NetScout's Quarterly Report on Form 10-Q for the quarterly period ended December 31, 2013, SEC File No. 000-26251, filed January 28, 2014, and incorporated herein by reference).
Form of Incentive Stock Option Agreement – Incorporated Terms and Conditions pursuant to 1999 Stock Option and Incentive Plan, as amended (filed as Exhibit 10.1 to NetScout’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2004, SEC File No 000-26251, filed November 4, 2004
 and incorporated herein by reference).
Lease between Arturo J. Gutierrez and John A. Cataldo, Trustees of Nashoba Westford Realty Trust, u/d/t dated April 27, 2000 and recorded with the Middlesex North Registry of Deeds in Book 10813, Page 38 and NetScout for Westford Technology Park West, as amended (filed as Exhibit 10.26 to NetScout’s Annual Report on Form 10-K for the fiscal year ended March 31, 2001, SEC File No. 000-26251, filed on June 29, 2001, and incorporated herein by reference).
Agreement Relating to Employment, dated January 3, 2007, by and between NetScout and Anil K. Singhal (filed as Exhibit 10.2 to NetScout’s Current Report on Form 8-K, SEC File No. 000-26251, filed on January 5, 2007 and incorporated herein by reference).
Amendment No. 1, dated February 2, 2007, to Agreement Relating to Employment by and between the Company and Anil K. Singhal (filed as exhibit 10.1 to NetScout’s Quarterly Report on Form 10-Q for the quarterly period ended December 31, 2006, SEC File No. 000-26251, filed February 5, 2007 and incorporated herein by reference).
Amendment No. 2, dated December 22, 2008, to Agreement Relating to Employment by and between the Company and Anil K. Singhal (filed as exhibit 10.1 to NetScout’s Quarterly Report on Form 10-Q for the quarterly period ended December 31, 2008, SEC File No. 000-26251, filed February 6, 2009 and incorporated herein by reference).
Amendment No. 3, dated May 28, 2012, to Agreement Relating to Employment, by and between the Company and Anil K. Singhal (filed as Exhibit 10.3 to NetScout’s Current Report on Form 8-K, SEC File No. 000-26251, filed on June 1, 2012 and incorporated herein by reference).
NetScout Systems, Inc. 2007 Equity Incentive Plan, as amended (filed as Appendix A to the Registrant’s Definitive Proxy Statement on Schedule 14A, SEC File No. 000-26251, filed with the Commission on July 28, 2015 and incorporated herein by reference)

.
NetScout Form of Restricted Stock Unit Agreement with respect to the NetScout 2007 Equity Incentive Plan (filed as Exhibit 99.2 to NetScout’s Registration Statement on Form S-8, SEC File No. 333-148364, filed on December 27, 2007 and incorporated herein by reference).
Form of Amended and Restated Severance Agreement for Named Executive Officers (other than the CEO and CFO) (filed as Exhibit 10.1 to NetScout’s Current Report on Form 8-K, SEC File No. 000-26251, filed on June 1, 2012 and incorporated herein by reference).

Amended and Restated Severance Agreement, dated May 28, 2012, by and between the Company and Jean Bua (filed as Exhibit 10.2 to NetScout’s Current Report on Form 8-K, SEC File No. 000-26251, filed on June 1, 2012 and incorporated herein by reference).
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Third Amendment Agreement, dated August 10, 2010, to that certain Lease, dated August 17, 2000, as amended, between the Company and Westford West I Limited Partnership, as successor to Arturo J. Gutierrez and John A. Cataldo, Trustees of Nashoba Westford Realty Trust, u/d/t dated April 27, 2000 (filed as Exhibit 10.1 to NetScout’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2010, SEC File No. 000-26251, filed November 9, 2010 and incorporated herein by reference).
NetScout Systems, Inc. Amended and Restated 2011 Employee Stock Purchase Plan (filed as Exhibit 10.1 to NetScout’s Current Report on Form 8-K, SEC File No. 000-26251, filed on September 13, 2018 and incorporated herein by reference).
Form of Amendment to Amended and Restated Severance Agreement for Executive Officers (filed as Exhibit 10.9 to NetScout’s Quarterly Report on Form 10-Q for the quarterly period ended December 31, 2014, SEC File No. 000-26251, filed on January 27, 2015 and incorporated herein by reference).
Tax Matters Agreement dated July 14, 2015 by and among Danaher Corporation, NetScout Systems, Inc. and Potomac Holding LLC (filed as Exhibit 10.1 to NetScout’s current report on Form 8-K, SEC File No. 000-26251, filed with the SEC on July 15, 2015 and incorporated herein by reference).
Transition Services Agreement dated July 14, 2015 by and among NetScout Systems, Inc., Danaher Corporation and Potomac Holding LLC (filed as Exhibit 10.2 to NetScout’s current report on Form 8-K, SEC File No. 000-26251, filed with the SEC on July 15, 2015 and incorporated herein by reference).
Employee Matters Agreement dated July 14, 2015 by and among NetScout Systems, Inc., Danaher Corporation and Potomac Holding LLC (filed as Exhibit 10.3 to NetScout’s current report on Form 8-K, SEC File No. 000-26251, filed with the SEC on July 15, 2015 and incorporated herein by reference).
Intellectual Property Cross-License Agreement dated July 14, 2015 by and between Danaher Corporation and Potomac Holding LLC (filed as Exhibit 10.4 to NetScout’s current report on Form 8-K, SEC File No. 000-26251, filed with the SEC on July 15, 2015 and incorporated herein by reference).
Amendment and Restatement Agreement dated as of January 16, 2018, to the Credit Agreement, dated as of July 14, 2015, by and among NetScout Systems, Inc.; certain subsidiaries of NetScout Systems, Inc. as loan parties; the lenders and issuing banks party thereto and JPMorgan Chase Bank, N.A., as administrative agent attaching the Amended and Restated Credit Agreement, dated as of January 16, 2018, by and among NetScout Systems, Inc.; JPMorgan Chase Bank, N.A., as administrative agent and collateral agent; JPMorgan Chase Bank, N.A., Wells Fargo Securities, LLC, Merrill Lynch, Pierce, Fenner & Smith Incorporated, RBC Capital Markets and KeyBanc Capital Markets Inc., as joint lead arrangers and joint bookrunners; SunTrust Bank, N.A., Santander Bank, N.A., U.S. Bank National Association and Fifth Third Bank, as co-documentation agents; and the lenders party thereto (filed as Exhibit 10.5 to NetScout’s current report on Form 8-K, SEC File No. 000-26251, filed with the SEC on January 18, 2018 and incorporated herein by reference herein.

reference.
Summary of Non-Employee Director Compensation (filed as Exhibit 10.1 to NetScout’s Quarterly Report on Form 10-Q for the quarterly period ended December 31, 2016, SEC File No. 000-26251, filed on February 2, 2017 and incorporated herein by reference).
Summary of Non-Employee Director Compensation (filed as Exhibit 10.1 to NetScout's Quarterly Report on Form 10Q for the quarterly period ended September 30, 2018, SEC fileFile No. 000-26251, filed on November 8, 2018 and incorporated herein by reference.
NetScout Systems, Inc. 2019 Equity Incentive Plan, as amended and restated (filed as Exhibit 99.1 to NetScout’s Registration Statement on Form S-8, SEC File No. 333-248786, filed on September 14, 2020 and incorporated herein by reference).
Form of Restricted Stock Unit Agreement with respect to the NetScout Systems, Inc. 2019 Equity Incentive Plan (filed as Exhibit 10.1 to NetScout’s Quarterly Report on Form 10-Q for the quarterly period ended December 31, 2019, SEC File No. 000-26251, filed on February 6, 2020 and incorporated herein by reference).
Subsidiaries of NetScout (filed herewith).
Consent of PricewaterhouseCoopers LLP (filed herewith).
Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 (filed herewith).
Certification Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 (filed herewith).
32.1
Certification Pursuant to Section 906 of the Sarbanes–Oxley Act of 2002 (furnished herewith).
32.2
Certification Pursuant to Section 906 of the Sarbanes–Oxley Act of 2002 (furnished herewith).
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55


*Indicates a management contract or compensatory plan or arrangement.
**XBRL (Extensible Business Reporting Language) information is furnished and not filed or a part of a registration statement or prospectus for purposes of sections 11 or 12 of the Securities Act of 1933, as amended, is deemed not filed for purposes of section 18 of the Securities Exchange Act of 1934, as amended, and otherwise is not subject to liability under these sections.
Exhibit has been furnished, is not deemed filed and is not to be incorporated by reference into any of the Company's filings under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, irrespective of any general incorporation language contained in any such filing




Item 16. Form 10-K Summary
Not provided.

56



SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
 
NETSCOUT SYSTEMS, INC.
By:
/S/    ANIL K. SINGHAL        
Anil K. Singhal
President, Chief Executive Officer,

and Chairman
Date: May 28, 201920, 2021
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.
 
SignatureTitle(s)Date
SignatureTitle(s)Date
/S/    ANIL K. SINGHAL
President, Chief Executive Officer,

and Chairman (Principal

Executive Officer)
May 28, 201920, 2021
Anil K. Singhal
/S/    JEAN BUA
Executive Vice President and Chief Financial

Officer (Principal Financial

Officer) (Principal Accounting

Officer)
May 28, 201920, 2021
Jean Bua
/S/    MICHAEL SZABADOS
Chief Operating Officer and Vice ChairmanMay 28, 201920, 2021
Michael Szabados
/S/    ROBERT E. DONAHUE
DirectorMay 28, 201920, 2021
Robert E. Donahue
/S/    JOHN R. EGAN
DirectorMay 28, 201920, 2021
John R. Egan
/S/    ALFRED GRASSO
DirectorMay 28, 201920, 2021
Alfred Grasso
/S/    JOSEPH G. HADZIMA, JR.
DirectorMay 28, 201920, 2021
Joseph G. Hadzima, Jr.
/S/    CHRISTOPHER PERRETTA
DirectorMay 28, 201920, 2021
Christopher Perretta
/S/    SUSAN L. SPRADLEY
DirectorMay 28, 201920, 2021
Susan L. Spradley
/S/    VIVIAN VITALE
DirectorMay 28, 201920, 2021
Vivian Vitale



57



NetScout Systems, Inc.
Index to Consolidated Financial Statements
 



F-1



Report of Independent Registered Public Accounting Firm






To the Board of Directors and StockholdersShareholders of NetScout Systems, Inc.:


Opinions on the Financial Statements and Internal Control over Financial Reporting


We have audited the accompanying consolidated balance sheets of NetScout Systems, Inc. and its subsidiaries (the “Company”) as of March 31, 20192021 and 2018,2020, and the related consolidated statements of operations, comprehensive income (loss), stockholders’ equity and cash flows for each of the three years in the period ended March 31, 2019,2021, including the related notes and schedule of valuation and qualifying accounts listed in the index appearing under Item 15(a)(2) (collectively referred to as the “consolidated financial statements”). We also have audited the Company's internal control over financial reporting as of March 31, 2019,2021, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).


In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of the Company as of March 31, 20192021 and 2018,2020, and the results of its operations and its cash flows for each of the three years in the period ended March 31, 20192021 in conformity with accounting principles generally accepted in the United States of America. Also, in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of March 31, 20192021, based on criteria established in Internal Control - Integrated Framework(2013) issued by the COSO.


ChangeChanges in Accounting PrinciplePrinciples


As discussed in NoteNotes 1 and 3 to the consolidated financial statements, the Company changed the manner in which it accounts for leases in 2020 and the manner in which it accounts for revenues from contracts with customers in 2019.


Basis for Opinions


The Company's management is responsible for these consolidated financial statements, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in Management’s Annual Report on Internal Control Overover Financial Reporting appearing under Item 9A. Our responsibility is to express opinions on the Company’s consolidated financial statements and on the Company's internal control over financial reporting based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.


We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud, and whether effective internal control over financial reporting was maintained in all material respects.


Our audits of the consolidated financial statements included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.


Definition and Limitations of Internal Control over Financial Reporting


A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures

F-2


Table of Contents


that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.


Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.



Critical Audit Matters


The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be communicated to the audit committee and that (i) relates to accounts or disclosures that are material to the consolidated financial statements and (ii) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Revenue from Contracts with Customers - Identification of Distinct Performance Obligations

As described in Note 3 to the consolidated financial statements, the Company derives revenues primarily from the sale of network management tools and security solutions for service provider and enterprise customers, which include hardware, software and service offerings. Customer contracts may include promises to transfer multiple products and services to a customer. Determining whether the products and services are considered distinct performance obligations that should be accounted for separately or as one combined performance obligation may require significant judgment. During the year ended March 31, 2021, the Company recognized revenue from contracts with customers of $831.3 million.

The principal considerations for our determination that performing procedures relating to revenue from contracts with customers, specifically the identification of distinct performance obligations, is a critical audit matter are the significant judgment by management in determining whether the products and services are considered distinct performance obligations that should be accounted for separately or as one combined performance obligation, which in turn led to a high degree of auditor judgment, subjectivity and effort in performing procedures to evaluate management’s identification of distinct performance obligations.

Addressing the matter involved performing procedures and evaluating audit evidence in connection with forming our overall opinion on the consolidated financial statements. These procedures included testing the effectiveness of controls relating to the revenue recognition process, including controls over the identification of distinct performance obligations. These procedures also included, among others, (i) testing management’s process for identifying distinct performance obligations, and (ii) evaluating the revenue recognition impact of contractual terms and conditions by examining customer contracts on a test basis.


/s/ PricewaterhouseCoopers LLP
Boston, Massachusetts
May 28, 201920, 2021


We have served as the Company’s auditor since 1993.



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NetScout Systems, Inc.
Consolidated Balance Sheets
(In thousands, except share and per share data)
March 31,
2019
 March 31,
2018
March 31,
2021
March 31,
2020
Assets   Assets
Current assets:   Current assets:
Cash and cash equivalents$409,632
 $369,821
Cash and cash equivalents$467,176 $338,489 
Marketable securities76,344
 77,941
Marketable securities9,277 47,969 
Accounts receivable and unbilled costs, net of allowance for doubtful accounts of $1,583 and $1,991 at March 31, 2019 and 2018, respectively235,318
 213,438
Accounts receivable and unbilled costs, net of allowance for doubtful accounts of $416 and $1,350 at March 31, 2021 and 2020, respectivelyAccounts receivable and unbilled costs, net of allowance for doubtful accounts of $416 and $1,350 at March 31, 2021 and 2020, respectively197,717 213,514 
Inventories and deferred costs26,270
 34,774
Inventories and deferred costs22,813 22,227 
Prepaid income taxes18,000
 22,932
Prepaid income taxes1,906 13,505 
Prepaid expenses and other current assets (related party balances of $335 and $3,187 at March 31, 2019 and 2018, respectively)35,658
 33,502
Prepaid expenses and other current assetsPrepaid expenses and other current assets23,583 24,039 
Total current assets801,222
 752,408
Total current assets722,472 659,743 
Fixed assets, net58,951
 52,511
Fixed assets, net48,474 57,715 
Operating lease right-of-use assetsOperating lease right-of-use assets61,512 68,583 
Goodwill1,715,485
 1,712,764
Goodwill1,717,554 1,725,680 
Intangible assets, net669,118
 831,374
Intangible assets, net511,866 582,179 
Deferred income taxes7,218
 6,685
Deferred income taxes8,096 6,220 
Long-term marketable securities1,012
 
Long-term marketable securities2,613 
Other assets16,988
 12,866
Other assets15,064 17,770 
Total assets$3,269,994
 $3,368,608
Total assets$3,085,038 $3,120,503 
Liabilities and Stockholders’ Equity   
Liabilities and Stockholders' EquityLiabilities and Stockholders' Equity
Current liabilities:   Current liabilities:
Accounts payable (related party balances of $244 and $369 at March 31, 2019 and 2018, respectively)$24,582
 $30,133
Accounts payableAccounts payable$17,964 $20,004 
Accrued compensation58,501
 46,552
Accrued compensation83,057 75,632 
Accrued other23,027
 33,164
Accrued other21,127 21,840 
Income taxes payable1,318
 1,526
Income taxes payable7,025 903 
Deferred revenue and customer deposits272,508
 301,925
Deferred revenue and customer deposits269,748 270,281 
Current portion of operating lease liabilitiesCurrent portion of operating lease liabilities12,354 10,337 
Total current liabilities379,936
 413,300
Total current liabilities411,275 398,997 
Other long-term liabilities19,493
 8,308
Other long-term liabilities21,641 10,039 
Deferred tax liability124,229
 151,563
Deferred tax liability92,287 114,394 
Accrued long-term retirement benefits36,284
 35,246
Accrued long-term retirement benefits39,479 34,256 
Long-term deferred revenue and customer deposits94,619
 91,409
Long-term deferred revenue and customer deposits103,310 104,240 
Operating lease liabilities, net of current portionOperating lease liabilities, net of current portion61,267 70,658 
Long-term debt550,000
 600,000
Long-term debt350,000 450,000 
Total liabilities1,204,561
 1,299,826
Total liabilities1,079,259 1,182,584 
Commitments and contingencies (Note 18)
 
Commitments and contingencies (Note 19)Commitments and contingencies (Note 19)00
Stockholders’ equity:   Stockholders’ equity:
Preferred stock, $0.001 par value: 5,000,000 shares authorized; no shares issued or outstanding at March 31, 2019 and 2018
 
Common stock, $0.001 par value: 300,000,000 shares authorized; 119,760,132 and 117,744,913 shares issued and 77,610,361 and 80,270,023 shares outstanding at March 31, 2019 and 2018, respectively120
 117
Preferred stock, $0.001 par value: 5,000,000 shares authorized; 0 shares issued or outstanding at March 31, 2021 and 2020Preferred stock, $0.001 par value: 5,000,000 shares authorized; 0 shares issued or outstanding at March 31, 2021 and 2020
Common stock, $0.001 par value: 300,000,000 shares authorized; 124,197,974 and 122,006,077 shares issued and 73,751,615 and 72,220,906 shares outstanding at March 31, 2021 and 2020, respectivelyCommon stock, $0.001 par value: 300,000,000 shares authorized; 124,197,974 and 122,006,077 shares issued and 73,751,615 and 72,220,906 shares outstanding at March 31, 2021 and 2020, respectively124 122 
Additional paid-in capital2,828,922
 2,665,120
Additional paid-in capital2,955,400 2,891,553 
Accumulated other comprehensive income (loss)(2,639) 2,895
Treasury stock at cost, 42,149,771 and 37,474,890 shares at March 31, 2019 and 2018, respectively(1,119,063) (995,843)
Accumulated other comprehensive lossAccumulated other comprehensive loss(1,940)(3,160)
Treasury stock at cost, 50,446,359 and 49,785,171 shares at March 31, 2021 and 2020, respectivelyTreasury stock at cost, 50,446,359 and 49,785,171 shares at March 31, 2021 and 2020, respectively(1,322,496)(1,305,935)
Retained earnings358,093
 396,493
Retained earnings374,691 355,339 
Total stockholders’ equity2,065,433
 2,068,782
Total stockholders’ equity2,005,779 1,937,919 
Total liabilities and stockholders’ equity$3,269,994
 $3,368,608
Total liabilities and stockholders’ equity$3,085,038 $3,120,503 
The accompanying notes are an integral part of these consolidated financial statements.

F-4


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NetScout Systems, Inc.
Consolidated Statements of Operations
(In thousands, except per share data)
 
Year Ended March 31, Fiscal Year Ended March 31,
2019 2018 2017 202120202019
Revenue:     Revenue:
Product$467,289
 $520,418
 $715,404
Product$377,721 $438,341 $467,289 
Service442,629
 466,369
 446,708
Service453,561 453,479 442,629 
Total revenue909,918
 986,787
 1,162,112
Total revenue831,282 891,820 909,918 
Cost of revenue:     Cost of revenue:
Product (related party balances of $0, $245, and $7,229, respectively)140,938
 158,628
 233,275
Service (related party balances of $529, $665, and $745, respectively)113,189
 113,277
 112,864
ProductProduct95,965 122,832 140,938 
ServiceService126,132 119,360 113,189 
Total cost of revenue254,127
 271,905
 346,139
Total cost of revenue222,097 242,192 254,127 
Gross profit655,791
 714,882
 815,973
Gross profit609,185 649,628 655,791 
Operating expenses:     Operating expenses:
Research and development (related party balances of $20, $3, and $1,624, respectively)203,588
 215,076
 232,701
Sales and marketing (related party balances of $0, $2, and $2,423, respectively)291,870
 312,536
 328,628
General and administrative (related party balances of $20, $1,703, and $4,099, respectively)93,572
 109,479
 118,438
Research and developmentResearch and development179,163 188,294 203,588 
Sales and marketingSales and marketing242,730 276,523 291,870 
General and administrativeGeneral and administrative88,969 99,994 93,572 
Amortization of acquired intangible assets74,305
 76,640
 70,141
Amortization of acquired intangible assets61,131 64,505 74,305 
Restructuring charges18,693
 5,209
 4,001
Restructuring charges62 2,674 18,693 
Impairment of intangible assets35,871
 
 
Impairment of intangible assets35,871 
Loss on divestiture of business9,472
 
 
Loss on divestiture of business9,472 
Total operating expenses727,371
 718,940
 753,909
Total operating expenses572,055 631,990 727,371 
Income (loss) from operations(71,580) (4,058) 62,064
Income (loss) from operations37,130 17,638 (71,580)
Interest and other income (expense), net:     
Interest and other expense, net:Interest and other expense, net:
Interest income5,245
 1,808
 1,021
Interest income646 4,528 5,245 
Interest expense(26,143) (12,633) (9,184)Interest expense(10,879)(20,597)(26,143)
Other expense, net (related party balances of $0, $56, and $426, respectively)(434) (3,776) (1,716)
Other income (expense), netOther income (expense), net(4,593)355 (434)
Total interest and other expense, net(21,332) (14,601) (9,879)Total interest and other expense, net(14,826)(15,714)(21,332)
Income (loss) before income tax expense (benefit)(92,912) (18,659) 52,185
Income (loss) before income tax expense (benefit)22,304 1,924 (92,912)
Income tax expense (benefit)(19,588) (98,471) 18,894
Income tax expense (benefit)2,952 4,678 (19,588)
Net income (loss)$(73,324) $79,812
 $33,291
Net income (loss)$19,352 $(2,754)$(73,324)
Basic net income (loss) per share$(0.93) $0.91
 $0.36
Basic net income (loss) per share$0.26 $(0.04)$(0.93)
Diluted net income (loss) per share$(0.93) $0.90
 $0.36
Diluted net income (loss) per share$0.26 $(0.04)$(0.93)
Weighted average common shares outstanding used in computing:     Weighted average common shares outstanding used in computing:
Net income (loss) per share—basic78,617
 87,425
 92,226
Net income (loss) per share—basic73,103 75,162 78,617 
Net income (loss) per share—diluted78,617
 88,261
 92,920
Net income (loss) per share—diluted73,822 75,162 78,617 




The accompanying notes are an integral part of these consolidated financial statements.

F-5


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NetScout Systems, Inc.
Consolidated Statements of Comprehensive Income (Loss)
(In thousands)
 
 Fiscal Year Ended March 31,
 202120202019
Net income (loss)$19,352 $(2,754)$(73,324)
Other comprehensive income (loss):
Cumulative translation adjustments2,926 (1,644)(3,229)
Recognition of actuarial net (losses) gains from pension and other post-retirement plans, net of (benefit) tax of ($657), $590, and ($976)(1,548)1,054 (2,278)
Changes in market value of investments:
Changes in unrealized (losses) gains, net of (benefit) tax of ($41), $39, and $19(130)126 60 
     Total net change in market value of investments(130)126 60 
Changes in market value of derivatives:
Changes in market value of derivatives, net of tax (benefit) of $66, ($25), and ($172)208 (78)(524)
Reclassification adjustment for net (loss) gain included in net income (loss), net of (benefit) tax of ($73), $7, and $138(236)21 437 
Total net change in market value of derivatives(28)(57)(87)
Other comprehensive income (loss)1,220 (521)(5,534)
Total comprehensive income (loss)$20,572 $(3,275)$(78,858)
 Year Ended March 31,
 2019 2018 2017
Net income (loss)$(73,324) $79,812
 $33,291
Other comprehensive income (loss):     
Cumulative translation adjustments(3,229) 4,889
 (1,000)
Recognition of actuarial net (loss) gain from pension and other post-retirement plans, net of (benefit) taxes of ($976), $435, and ($368)(2,278) 1,353
 (858)
Changes in market value of investments:     
Changes in unrealized gains (losses), net of taxes (benefit) of $19, $15, and $060
 (6) (59)
     Total net change in market value of investments60
 (6) (59)
Changes in market value of derivatives:     
Changes in market value of derivatives, net of tax (benefits) of ($172), $267, and ($167)(524) 812
 (277)
Reclassification adjustment for net (losses) gains included in net income (loss), net of (benefit) taxes of $138, ($219), and $135437
 (681) 223
Total net change in market value of derivatives(87) 131
 (54)
Other comprehensive income (loss)(5,534) 6,367
 (1,971)
Total comprehensive income (loss)$(78,858) $86,179
 $31,320
















































The accompanying notes are an integral part of these consolidated financial statements.

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Table of Contents


NetScout Systems, Inc.
Consolidated Statements of Stockholders' Equity
(In thousands, except share data)
Common stock
Voting
Additional
Paid In
Capital
Accumulated
Other
Comprehensive
Income (Loss)
Treasury stockRetained
Earnings
Total
Stockholders'
Equity
Common stock
Voting
 
Additional
Paid In
Capital
 
Accumulated
Other
Comprehensive
Income (Loss)
 Treasury stock 
Retained
Earnings
 
Total
Stockholders'
Equity
SharesPar
Value
SharesStated
Value
Balance, March 31, 2018Balance, March 31, 2018117,744,913 $117 $2,665,120 $2,895 37,474,890 $(995,843)$396,493 $2,068,782 
Shares 
Par
Value
 
Additional
Paid In
Capital
 
Accumulated
Other
Comprehensive
Income (Loss)
 Shares 
Stated
Value
 
Retained
Earnings
 
Total
Stockholders'
Equity
Balance, March 31, 2016114,495,614
 $114
 20,407,145
 $(481,366) 
Net income        
Unrealized net investment losses      (59)       (59)
Net lossNet loss(73,324)(73,324)
Unrealized net investment gainsUnrealized net investment gains60 60 
Unrealized net losses on derivative financial instruments      (54)       (54)Unrealized net losses on derivative financial instruments(87)(87)
Cumulative translation adjustments      (1,000)       (1,000)Cumulative translation adjustments(3,229)(3,229)
Recognition of actuarial net losses from pension and other post-retirement plan      (858)       (858)Recognition of actuarial net losses from pension and other post-retirement plan(2,278)(2,278)
Issuance of common stock pursuant to vesting of restricted stock units950,159
 2
     

 

   2
Issuance of common stock pursuant to vesting of restricted stock units1,438,219 
Stock-based compensation expense for restricted stock units granted to employees    36,449
         36,449
Stock-based compensation expense for restricted stock units granted to employees51,945 51,945 
Issuance of common stock under employee stock purchase plan471,658
   15,697
         15,697
Issuance of common stock under employee stock purchase plan577,000 15,074 15,074 
Repurchase of treasury stock        3,468,998
 (89,555)   (89,555)Repurchase of treasury stock96,783 4,674,881 (123,220)(26,437)
Shortfall from tax benefit from share-based compensation awards    (1,045)         (1,045)
Balance, March 31, 2017115,917,431
 116
 2,693,846
 (3,472) 23,876,143
 (570,921) 316,681
 2,436,250
Net income            79,812
 79,812
Unrealized net investment losses      (6)       (6)
Unrealized net gains on derivative financial instruments      131
       131
Cumulative effect of adoption of ASU 2014-09Cumulative effect of adoption of ASU 2014-0934,924 34,924 
Balance, March 31, 2019Balance, March 31, 2019119,760,132 120 2,828,922 (2,639)42,149,771 (1,119,063)358,093 2,065,433 
Net lossNet loss(2,754)(2,754)
Unrealized net investment gainsUnrealized net investment gains126 126 
Unrealized net losses on derivative financial instrumentsUnrealized net losses on derivative financial instruments(57)(57)
Cumulative translation adjustments      4,889
       4,889
Cumulative translation adjustments(1,644)(1,644)
Recognition of actuarial net gains from pension and other post-retirement plan      1,353
       1,353
Recognition of actuarial net gains from pension and other post-retirement plan1,054 1,054 
Issuance of common stock pursuant to vesting of restricted stock units1,216,535
 1
           1
Issuance of common stock pursuant to vesting of restricted stock units1,651,284 
Stock-based compensation expense for restricted stock units granted to employees    43,425
         43,425
Stock-based compensation expense for restricted stock units granted to employees48,404 48,404 
Issuance of common stock under employee stock purchase plan610,947
   17,849
         17,849
Issuance of common stock under employee stock purchase plan594,661 14,227 14,227 
Repurchase of treasury stock    (90,000)   13,598,747
 (424,922)   (514,922)Repurchase of treasury stock7,635,400 (186,872)(186,872)
Balance, March 31, 2018117,744,913
 117
 2,665,120
 2,895
 37,474,890
 (995,843) 396,493
 2,068,782
Net loss            (73,324) (73,324)
Unrealized net investment gains      60
       60
Balance, March 31, 2020Balance, March 31, 2020122,006,077 122 2,891,553 (3,160)49,785,171 (1,305,935)355,339 1,937,919 
Net incomeNet income19,352 19,352 
Unrealized net investment lossesUnrealized net investment losses(130)(130)
Unrealized net losses on derivative financial instruments      (87)       (87)Unrealized net losses on derivative financial instruments(28)(28)
Cumulative translation adjustments      (3,229)       (3,229)Cumulative translation adjustments2,926 2,926 
Recognition of actuarial net losses from pension and other post-retirement plan      (2,278)       (2,278)Recognition of actuarial net losses from pension and other post-retirement plan(1,548)(1,548)
Issuance of common stock pursuant to vesting of restricted stock units1,438,219
 3
           3
Issuance of common stock pursuant to vesting of restricted stock units1,630,228 
Stock-based compensation expense for restricted stock units granted to employees    51,945
         51,945
Stock-based compensation expense for restricted stock units granted to employees49,418 49,418 
Issuance of common stock under employee stock purchase plan577,000
   15,074
         15,074
Issuance of common stock under employee stock purchase plan561,669 14,429 14,429 
Repurchase of treasury stock    96,783
   4,674,881
 (123,220)   (26,437)Repurchase of treasury stock0661,188 (16,561)(16,561)
Cumulative effect of adoption of ASU 2014-09            34,924
 34,924
Balance, March 31, 2019119,760,132
 $120
 $2,828,922
 $(2,639) 42,149,771
 $(1,119,063) $358,093
 $2,065,433
Balance, March 31, 2021Balance, March 31, 2021124,197,974 $124 $2,955,400 $(1,940)50,446,359 $(1,322,496)$374,691 $2,005,779 
The accompanying notes are an integral part of these consolidated financial statements.

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NetScout Systems, Inc.
Consolidated Statements of Cash Flows
(In thousands)
Year Ended March 31, Fiscal Year Ended March 31,
2019 2018 2017 202120202019
Cash flows from operating activities:     Cash flows from operating activities:
Net income (loss)$(73,324) $79,812
 $33,291
Net income (loss)$19,352 $(2,754)$(73,324)
Adjustments to reconcile net income (loss) to cash provided by operating activities, net of the effects of acquisitions:     Adjustments to reconcile net income (loss) to cash provided by operating activities, net of the effects of acquisitions:
Depreciation and amortization137,878
 153,503
 160,863
Depreciation and amortization105,828 116,104 137,878 
Operating lease right-of-use assetsOperating lease right-of-use assets10,004 10,504 — 
Loss on divestiture of business7,660
 
 
Loss on divestiture of business7,660 
Loss on disposal of fixed assets260
 481
 271
Loss on disposal of fixed assets236 16 260 
Deal related compensation expense and accretion charges102
 153
 153
Deal related compensation expense and accretion charges102 
Share-based compensation expense associated with equity awards56,328
 47,317
 39,189
Share-based compensation expense associated with equity awards51,892 50,861 56,328 
Net change in fair value of contingent and contractual liabilities1,614
 
 
Net change in fair value of contingent and contractual liabilities798 1,614 
Accretion of contingent consideration(119) 
 
Accretion of contingent consideration(36)(119)
Impairment charge35,871
 
 
Impairment charge35,871 
Deferred income taxes(33,442) (127,784) (11,008)Deferred income taxes(23,804)(9,821)(33,442)
Other (gains) losses(152) 18
 (111)
Other gainsOther gains(196)(152)(152)
Changes in assets and liabilities     Changes in assets and liabilities
Accounts receivable and unbilled costs(22,180) 84,952
 (48,080)Accounts receivable and unbilled costs16,878 21,472 (22,180)
Due from related party172
 443
 25,055
Due from related party172 
Inventories5,321
 1,006
 12,456
Inventories(2,043)1,501 5,321 
Prepaid expenses and other assets3,034
 20,147
 (24,751)Prepaid expenses and other assets11,483 13,839 3,034 
Accounts payable(3,876) (8,929) 405
Accounts payable(1,734)(4,288)(3,876)
Accrued compensation and other expenses19,964
 (17,718) 6,785
Accrued compensation and other expenses31,955 32,812 19,964 
Operating lease liabilitiesOperating lease liabilities(10,307)(13,077)— 
Due to related party234
 (75) (2,792)Due to related party234 
Income taxes payable(639) (2,734) 1,963
Income taxes payable6,684 (919)(639)
Deferred revenue15,132
 (8,138) 33,075
Deferred revenue(2,307)8,163 15,132 
Net cash provided by operating activities149,838
 222,454
 226,764
Net cash provided by operating activities213,921 225,023 149,838 
Cash flows from investing activities:     Cash flows from investing activities:
Purchase of marketable securities(229,769) (114,178) (199,841)Purchase of marketable securities(15,673)(117,383)(229,769)
Proceeds from maturity of marketable securities230,433
 196,041
 181,321
Proceeds from maturity of marketable securities56,806 144,322 230,433 
Purchase of fixed assets(23,392) (15,913) (29,696)Purchase of fixed assets(11,986)(19,922)(23,392)
Purchase of intangible assets
 (544) (1,031)Purchase of intangible assets(4,537)
Payments related to the divestiture of business(3,293) 
 
Payments related to the divestiture of business(3,293)
Acquisition of businesses, net of cash acquired
 (8,334) (4,606)Acquisition of businesses, net of cash acquired(11,347)
(Increase) decrease in deposits(97) (330) 129
Contingent purchase consideration
 523
 660
Collection of contingently returnable consideration
 
 12,864
Decrease (increase) in depositsDecrease (increase) in deposits88 (31)(97)
Collection of contingent considerationCollection of contingent consideration52 
Capitalized software development costs(134) (137) (1,421)Capitalized software development costs(134)
Net cash (used in) provided by investing activities(26,252)
57,128

(41,621)
Net cash provided by (used in) investing activitiesNet cash provided by (used in) investing activities24,698 (4,309)(26,252)
Cash flows from financing activities:     Cash flows from financing activities:
Issuance of common stock under stock plans3
 1
 2
Issuance of common stock under stock plans
Payment of contingent consideration(2,851) (660) 
Payment of contingent consideration(1,748)(2,851)
Treasury stock repurchases, including accelerated share repurchases(14,468) (501,324) (79,996)
Treasury stock repurchasesTreasury stock repurchases(3,275)(175,000)(14,468)
Tax withholding on restricted stock units(11,969) (13,598) (9,559)Tax withholding on restricted stock units(13,286)(11,872)(11,969)
Proceeds from issuance of long-term debt, net of issuance costs
 294,619
 
Repayment of long-term debt(50,000) 
 
Repayment of long-term debt(100,000)(100,000)(50,000)
Net cash used in financing activities(79,285) (220,962) (89,553)Net cash used in financing activities(118,307)(286,870)(79,285)
Effect of exchange rate changes on cash and cash equivalents(5,212) 6,385
 (761)Effect of exchange rate changes on cash and cash equivalents6,627 (3,427)(5,212)
Net increase in cash and cash equivalents39,089
 65,005
 94,829
Cash and cash equivalents, beginning of year370,731
 305,726
 210,897
Cash and cash equivalents, end of year$409,820
 $370,731
 $305,726
Net increase (decrease) in cash and cash equivalentsNet increase (decrease) in cash and cash equivalents126,939 (69,583)39,089 
Cash and cash equivalents and restricted cash, beginning of yearCash and cash equivalents and restricted cash, beginning of year340,237 409,820 370,731 
Cash and cash equivalents and restricted cash, end of yearCash and cash equivalents and restricted cash, end of year$467,176 $340,237 $409,820 
Supplemental disclosures of cash flow information:     Supplemental disclosures of cash flow information:
Cash paid for interest$23,281
 $9,604
 $6,442
Cash paid for interest$7,685 $17,644 $23,281 
Cash paid for income taxes$13,381
 $18,216
 $49,290
Cash paid for income taxes$11,472 $13,061 $13,381 
Non-cash transactions:     Non-cash transactions:
Transfers of inventory to fixed assets$2,152
 $5,556
 $4,928
Transfers of inventory to fixed assets$1,530 $2,290 $2,152 
Additions to property, plant and equipment included in accounts payable$455
 $1,379
 $1,241
Additions to property, plant and equipment included in accounts payable$333 $255 $455 
Issuance of common stock under employee stock purchase plans$15,074
 $17,849
 $15,697
Issuance of common stock under employee stock purchase plans$14,429 $14,227 $15,074 
Contingent consideration related to acquisition, included in accrued other$
 $523
 $660
Contingent consideration related to acquisition, included in accrued other$$1,800 $
Tenant improvement allowance$10,171
 $2,104
 $
Tenant improvement allowance$$$10,171 
Initial fair value of contingent consideration received as partial consideration for divestiture of business$2,257
 $
 $
Initial fair value of contingent consideration received as partial consideration for divestiture of business$$$2,257 
The accompanying notes are an integral part of these consolidated financial statements.

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NetScout Systems, Inc.
Notes to Consolidated Financial Statements

NOTE 1 – NATURE OF BUSINESS
NetScout Systems, Inc., or NetScout or the Company, has been a technology innovator for three-plus decades since its founding in 1984. The Company's solutions, based on patented Adaptive Service Intelligence (ASI) technology, help customers identify network and application performance issues, defend their networks from denial of service (DDoS) attacks, and rapidly find and isolate advanced network threats. As a result, customers can quickly resolve issues that cause business disruptions, downtime, poor service quality or compromised security, thereby driving compelling returns on their investments in their network and broader information technology (IT) initiatives. The Company reports revenue and income in one reportable segment.
NOTE 2 – SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Principles of Consolidation
The consolidated financial statements include the accounts of NetScout and its wholly owned subsidiaries. Inter-company transactions and balances have been eliminated in consolidation.
Certain amounts for the twelve months ended March 31, 2018 and March 31, 2017, respectively, have been reclassified to conform to the current period presentation. These reclassifications had no effect on the reported results of operations.
Segment Reporting
The Company's operating segments are determined based on the units that constitute a business for which financial information is available and for which operating results are regularly reviewed by the Chief Operating Decision Maker (CODM). The Company reports revenue and income in one1 reportable segment.
Use of Estimates
The preparation of financial statements in conformity with generally accepted accounting principles (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates in these financial statements include those involving revenue recognition, valuation of goodwill and acquired assets and liabilities, valuation of the pension obligation, valuation of contingent consideration and share-based compensation. These items are continuously monitored and analyzed by management for changes in facts and circumstances and material changes in these estimates could occur in the future.
The Company considered the impact of the COVID-19 pandemic on the use of estimates and assumptions used for financial reporting. The full extent to which the COVID-19 pandemic will directly or indirectly impact the Company's business, results of operations and financial condition, including sales, expenses, reserves and allowances, manufacturing, research and development costs and employee-related amounts, will depend on future developments that are highly uncertain, including as a result of new information that may emerge concerning COVID-19 and the actions taken to contain it or treat COVID-19, as well as the economic impact on local, regional, national and international customers and markets. The Company has made estimates within our financial statements and there may be changes to those estimates in future periods. Actual results may differ from these estimates.
COVID-19 Risks and Uncertainties
The Company is closely monitoring the impact of the COVID-19 pandemic on all aspects of its business. COVID-19 was declared a global pandemic by the World Health Organization on March 11, 2020 and the President of the United States declared the COVID-19 outbreak a national emergency. The future impacts of the pandemic and any resulting economic impact on the Company's operations are largely unknown and rapidly evolving. It is possible that the COVID-19 pandemic, the measures taken by the governments of countries affected and the resulting economic impact may materially and adversely affect the Company’s results of operations, cash flows and financial position as well as its customers.
Under Accounting Standards Update (ASU) 2014-15, Presentation of Financial Statements—Going Concern (Subtopic 205-40), or ASC 205-40, the Company has the responsibility to evaluate whether conditions and/or events raise substantial doubt about its ability to meet its future financial obligations as they become due within one year after the date that the financial statements are issued. The Company is taking precautionary actions to reduce costs and spending across the organization. This includes limiting discretionary spending and reducing hiring activities. In addition, based on covenant levels at March 31, 2021, the Company has an incremental $336 million available under its $1.0 billion revolving credit facility.
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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)

On March 27, 2020, the Coronavirus Aid, Relief and Economic Security Act (the CARES Act) was enacted. The CARES Act, among other things, includes provisions relating to refundable payroll tax credits, deferment of employer social security payments, net operating loss carryback periods, alternative minimum tax credit refunds, modifications to the net interest deduction limitations and technical corrections to tax depreciation methods for qualified improvement property. The Company has elected to defer the employer-paid portion of social security taxes. As of March 31, 2021, the Company had deferred $8.9 million of employer payroll taxes, of which 50% are required to be deposited by December 2021 and the remaining 50% by December 2022. The balance of $4.5 million was included as accrued other and a balance of $4.4 million was included as other long-term liabilities in the Company's consolidated balance sheet at March 31, 2021.
The Company expects net cash provided by operations combined with cash, cash equivalents, and marketable securities and borrowing availability under the revolving credit facility to provide sufficient liquidity to fund current obligations, capital spending, debt service requirements and working capital requirements over at least the next twelve months.
Cash and Cash Equivalents and Marketable Securities
Under current authoritative guidance, NetScout has classified its investments as "available-for-sale" which are carried at fair value based on quoted market prices and associated unrealized gains or losses are recorded as a separate component of stockholders’ equity until realized. NetScout considers all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents and those investments with original maturities greater than three months to be marketable securities.
At March 31, 20192021 and periodically throughout the year, NetScout has maintained cash balances in various operating accounts in excess of federally insured limits. NetScout limits the amount of credit exposure by investing only with credit worthy institutions which the Company believes are those institutions with an investment grade rating for deposits.
Revenue Recognition
The Company accounts for revenue in accordance with ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), which was adopted on April 1, 2018 using the modified retrospective transition method. For further discussion of the Company's accounting policies related to revenue see Note 3, "Revenue Recognition."
Commission Expense
Sales commissions are recorded as an asset when the initial contract's duration is longer than 12 months and amortized to expense ratably over the remaining performance periods of the related contracts.

Table of Contents

Notes to Consolidated Financial Statements—(Continued)


Uncollected Deferred Revenue
Because of NetScout's revenue recognition policies, there are circumstances for which the Company does not recognize revenue relating to sales transactions that have been billed, but the related account receivable has not been collected. While the receivable represents an enforceable obligation, for balance sheet presentation purposes, the Company has not recognized the deferred revenue or the related account receivable and no amounts appear in the consolidated balance sheets for such transactions because control of the underlying deliverable has not transferred. The aggregate amount of unrecognized accounts receivable and deferred revenue was $23.3$7.1 million and $20.0$11.1 million at March 31, 20192021 and 2018,2020, respectively.
Concentration of Credit Risk
Financial instruments that potentially subject the Company to concentration of credit risk consist primarily of investments, trade accounts receivable and accounts payable. NetScout's cash, cash equivalents, and marketable securities are placed with financial institutions with high credit standings.
At March 31, 2019 and 2018 respectively,2021, the Company had one direct customer who accounted for more than 10% of the accounts receivable balance, while no indirect channel partners accounted for more than 10% of the accounts receivable balance. At March 31, 2020, the Company had no direct customers or indirect channel partners which accounted for more than 10% of the accounts receivable balance.
During the fiscal yearsyears ended March 31, 2021, 2020 and 2019 and 2018 respectively, no direct customers or indirect channel partners accounted for more than 10% of total revenue. During the fiscal year ended March 31, 2017, one direct customer, Verizon Communications Inc. (Verizon), accounted for more than 10% of total revenue, while no indirect channel partner accounted for more than 10% of total revenue.revenue.
Historically, the Company has not experienced any significant failure of its customers to meet their payment obligations nor does the Company anticipate material non-performance by its customers in the future; accordingly, the Company does not
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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)

require collateral from its customers. However, if the Company’s assumptions are incorrect, there could be an adverse impact on its allowance for doubtful accounts.
Trade Receivable Valuations
Accounts receivable are stated at their net realizable value. The allowance against gross trade receivables reflects the best estimate of probable losses inherent in the receivables portfolio determined on the basis of historical experience, specific allowances for known troubled accounts and other currently available information.
Inventories
Inventories are stated at the lower of actual cost or net realizable value. Cost is determined by using the first-in, first-out (FIFO) method.
Fixed Assets
Fixed assets are stated at cost and depreciated using the straight-line method over the estimated useful lives of the assets. Leasehold improvements are amortized on a straight-line basis over the shorter of the lease term or anticipated useful life of the improvement. Gains and losses upon asset disposal are recognized in the year of disposition. Expenditures for replacements and building improvements are capitalized, while expenditures for maintenance and repairs are charged against earnings as incurred.
Leases
The Company accounts for leases in accordance with ASU No. 2016-02, Leases (Topic 842), which was adopted April 1, 2019. Prior to the adoption of Topic 842, the Company followed the guidance for leases under Topic 840, Leases. For further discussion of the Company's policies related to leases see Note 18, "Leases."
The Company has operating leases for administrative, research and development, sales and marketing and manufacturing facilities and equipment under various non-cancelable lease agreements. Lease commencement occurs on the date the Company takes possession or control of the property or equipment. The Company's lease terms may include options to extend or terminate the lease where it is reasonably certain that the Company will exercise those options. The Company considers several economic factors when making this determination, including but not limited to, the significance of leasehold improvements incurred in the office space, the difficulty in replacing the asset, underlying contractual obligations, or specific characteristics unique to a particular lease. The Company's lease agreements do not contain any material residual value guarantees or material restrictive covenants.
Valuation of Goodwill, Intangible Assets and Other Acquisition and Divestiture Accounting Items
The Company amortizes acquired definite-lived intangible assets over their estimated useful lives. Goodwill and other indefinite-lived intangible assets are not amortized but subject to annual impairment tests; more frequently if events or circumstances occur that would indicate a potential decline in their fair value. The Company performs the assessment annually during the fourth quarter and on an interim basis if potential impairment indicators arise. 
Reporting units are determined based on the components of a Company's operating segments that constitute a business for which financial information is available and for which operating results are regularly reviewed by segment management. The Company has identified two1 reporting units: (1) Service Assurance and (2) Security.

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Notes to Consolidated Financial Statements—(Continued)


unit.
To test impairment, the Company first assesses qualitative factors to determine whether the existence of events and circumstances indicate that it is more likely than not that the intangible asset is impaired. If based on the Company's qualitative assessment it is more likely than not that the fair value of the intangible asset is less than its carrying amount, quantitative impairment testing is required. However, if the Company concludes otherwise, quantitative impairment testing is not required. During fourth quarter of fiscal year 2019,2021, the Company performed a quantitativeits annual impairment analysis for goodwill. Thegoodwill as of January 31, 2021, using the qualitative Step 0 assessment as the Company determinedconcluded that it was more likely than not that the fair value of the reporting unit's goodwill using established income and market valuation approaches. Goodwill was estimated to be recoverable as of January 31, 2019.unit exceeded its carrying value.
Indefinite-lived intangible assets are tested for impairment at least annually, or on an interim basis if an event occurs or circumstances change that would, more likely than not, reduce the fair value of the indefinite-lived intangible assets below its carrying value. To test impairment, the Company first assesses qualitative factors to determine whether the existence of events and circumstances indicate that it is more likely than not that the indefinite-lived intangible is impaired. If based on the Company's qualitative assessment, the Company concludes that it is more likely than not that the fair value of the indefinite-livedindefinite-
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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)

lived asset is greaterless than its carrying amount, quantitative impairment testing is required. However, if the Company concludes otherwise, quantitative impairment testing is not required. TheDuring the fourth quarter of fiscal year 2021, the Company completed its annual impairment test of the indefinite-lived intangible asset at January 31, 20192021, using the qualitative Step 0 assessment. No impairment indicators were observedassessment as the Company concluded that it was more likely than not that the fair value of January 31, 2019.the indefinite-lived asset exceeded its carrying value.
The Company completed two2 acquisitions and one1 divestiture during the three-year period ended March 31, 2019.2021. The acquisition method of accounting requires an estimate of the fair value of the assets and liabilities acquired as part of these transactions. In order to estimate the fair value of acquired intangible assets, the Company uses a relief from royalty model which requires management to estimate: future revenues expected to be generated by the acquired intangible assets, a royalty rate which aeither an income, market participant would payor cost method approach.
The Company's level 3 liabilities at March 31, 2020 consisted of contingent purchase consideration related to the projected revenue stream, a present value factor which approximates a risk adjusted rate of return for a market participant purchasingtwo acquisitions that occurred during the assets, and a technology migration curve representing a period of time over which the technology assets or some portion thereof are still being used.fiscal year 2020. The Company is also required to develop the fair value for customer relationships acquired as part of these transactions which requires that it create estimates for the following items: a projection of future revenues associated with the acquired company's existing customers, a turnover rate for those customers, a margin related to those sales, and a risk adjusted rate of return for a market participant purchasing those relationships.
The Company has a contingent purchase consideration asset related to the divestiture of its handheld network test (HNT) tools business in September 2018. The contingent consideration asset represents potential future earnout payments to the Company of up to $4.0 million over two years that are contingent on the HNT tools business achieving certain milestones. The fair value of the contingent consideration of $2.3 million was recognized on the acquisition date and was measured using unobservable (Level 3) inputs. The value of the contingent consideration asset at March 31, 2019 was $0.8 million.
The Company had a contingent liability at March 31, 2018 for $523 thousand related to the acquisition of Efflux in July 2017 for2 acquisitions represent amounts deposited into escrow accounts, which an escrow account waswere established to cover damages NetScout may have suffered related to any liabilities that NetScout did not agree to assume or as a result of the breach of representations and warranties of the sellersellers as described in the merger agreement.acquisition agreements. The $523 thousandcontingent purchase consideration of $0.7 million and $1.0 million related to the Gigavation Incorporated (Gigavation) and Eastwind Networks, Inc. (Eastwind) acquisitions, respectively are included as accrued other in the Company's consolidated balance sheet at March 31, 2020. The $0.7 million related to the Gigavation acquisition was paid to the seller in July 2018.
February 2021. The Company had a contingent liability at March 31, 2018 for $4.9$1.0 million related to the Eastwind acquisition of Simena LLC in November 2011, which was based on the ultimate settlement of assets and liabilities acquired as part of the transaction, and the former owners' future period of employment with NetScout. The contingent purchase consideration of $5.0 million was paid to the seller in November 2018.April 2020.
TheDuring fiscal year 2019, the Company had $660 thousand ofrecorded a contingent purchase consideration related to the acquisition of Avvasi Incorporated (Avvasi) in August 2016 for which an escrow account was established to cover damages NetScout may have suffered related to any liabilities that NetScout did not agree to assume or as a resultdivestiture of the breachCompany's handheld network test (HNT) tools business in September 2018. The contingent consideration represented potential future earnout payments to the Company of representations and warrantiesup to $4.0 million over two years that were contingent on the HNT tools business achieving certain milestones. The fair value of the seller as describedcontingent consideration of $2.3 million was recognized on the divestiture date and was measured using unobservable (Level 3) inputs. The Company recorded an $0.8 million and a $1.6 million change in the asset purchase agreement. The $660 thousand was paid tofair value of the sellercontingent consideration, which is included in August 2017.other expense, net within the Company's consolidated statement of operations for the years ended March 31, 2020 and 2019.
Capitalized Software Development Costs
Costs incurred in the research and development of the Company’sCompany's products are expensed as incurred, except for certain software development costs. Costs associated with the development of computer software are expensed prior to the establishment of technological feasibility and capitalized thereafter until the related software products are available for first customer shipment. Such costs are amortized using the straight-line method over the estimated economic life of the product, which generally does not exceed three years. Capitalized software development costs are periodically assessed for recoverability in the event of changes to the anticipated future revenue for the software products or changes in product

Table of Contents

Notes to Consolidated Financial Statements—(Continued)


technologies. Unamortized capitalized software development costs that are determined to be in excess of the net realizable value of the software products would be expensed in the period in which such a determination is made.
Typically for accounting purposes, these R&D investments have not been capitalized because of the development methodology employed. The developments are added individually to the core code over a shorter period of time but marketed as a release once all portions are complete.
Amortization included as cost of product revenue was $1.1$0.1 million, $1.0$0.5 million, and $594 thousand$1.1 million for the fiscal years ended March 31, 2019, 2018,2021, 2020, and 2017,2019, respectively. The Company capitalized $0.1 million and $0.1 million indid 0t capitalize software development costs in the fiscal years ended March 31, 2019 and 2018.2021 or 2020.
Derivative Financial Instruments
Under authoritative guidance for derivative instruments and hedging activities, all hedging activities must be documented at the inception of the hedge and must meet the definition of highly effective in offsetting changes to future cash flows in order for the derivative to qualify for hedge accounting. Under the guidance, if an instrument qualifies for hedge accounting, the changes in the fair value each period for open contracts, measured at the end of the period, are recorded to other comprehensive income. Otherwise, changes in the fair value are recorded in earnings each period. Management must perform initial and ongoing tests in order to qualify for hedge accounting. In accordance with the guidance, the Company accounts for its instruments under hedge accounting. The effectiveness and a measurement of ineffectiveness of qualifying hedge contracts are assessed by the Company quarterly. The Company records the fair value of its derivatives in prepaid expenses and other current assets and accrued other in the Company's consolidated balance sheet. The effective portion of gains or losses resulting from
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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)

changes in the fair value of qualifying hedges are recorded in other comprehensive income (loss) until the forecasted transaction occurs, with any ineffective portion classified directly to the Company’s consolidated statement of operations based on the expense categories of the items being hedged. When forecasted transactions occur, unrealized gains or losses associated with the effective portion of the hedge are reclassified to the respective expense categories in the Company’s consolidated statement of operations. Gains or losses related to hedging activity are included as operating activities in the Company’s consolidated statement of cash flows. If the underlying forecasted transactions do not occur, or it becomes probable that they will not occur, the gain or loss on the related cash flow hedge is recognized immediately in earnings.
NetScout also periodically enters into forward contracts to manage exchange rate risk associated with certain third-party transactions and for which the Company does not elect hedge accounting treatment as there is no difference in the timing of gain or loss recognition on the hedge instrument and the hedged item.
Contingencies
NetScout accounts for claims and contingencies in accordance with authoritative guidance that requires an estimated loss to be recorded from a claim or loss contingency when information available prior to issuance of its consolidated financial statements indicates that it is probable that a liability has been incurred at the date of the consolidated financial statements and the amount of the loss can be reasonably estimated. If NetScout determines that it is reasonably possible but not probable that an asset has been impaired or a liability has been incurred or if the amount of a probable loss cannot be reasonably estimated, then in accordance with the authoritative guidance, Netscout discloses the amount or range of estimated loss if the amount or range of estimated loss is material. Accounting for claims and contingencies requires NetScout to use its judgment. NetScout consults with legal counsel on those issues related to litigation and seeks input from other experts and advisors with respect to matters in the ordinary course of business.
Contingent assets and liabilities include contingent consideration in connection with the Company’sCompany's acquisitions and divestitures. Contingent consideration represents earnout payments in connection with the Company’sCompany's acquisitions and divestitures and is recognized at fair value on the acquisition date and remeasured each reporting period with subsequent adjustments recognized in the consolidated statements of income. The Company discounts the contingent purchase consideration to present value using a risk adjusted interest rate at each reporting period. Contingent consideration is valued using significant inputs that are not observable in the market which are defined as Level 3 inputs pursuant to fair value measurement accounting. The Company believes its estimates and assumptions are reasonable, however, there is significant judgment involved.
Changes in the fair value of contingent assets and liabilities may result from changes in discount periods. The Company reflects changes in fair value due to probability changes in earnings in the consolidated statements of income. Earnout payments are reflected in both cash flows from operating and financing activities and the changes in fair value are reflected in cash flows from operating activities in the consolidated statements of cash flows.

Table of Contents

Notes to Consolidated Financial Statements—(Continued)


Share-Based Compensation
NetScout recognizes compensation expense for all share-based payments granted. Under the fair value recognition provisions, share-based compensation is calculated net of an estimated forfeiture rate and compensation cost is only recognized for those shares expected to vest on a straight-line basis over the expected requisite service period of the award.
Foreign Currency
NetScout accounts for its reporting of foreign operations in accordance with guidance which establishes guidelines for the determination of the functional currency of foreign subsidiaries. In accordance with the guidance, NetScout has determined its functional currency for those foreign subsidiaries that are an extension of NetScout's U.S. operations to be the U.S. Dollar.
Assets and liabilities of subsidiaries operating outside the United States with a functional currency other than U.S. dollars are translated into United StatesU.S. dollars using the period-end exchange rate, and income and expense items are translated using the average exchange rate during the period. Cumulative translation adjustments are reflected as a separate component of stockholders’stockholders' equity.
NetScout will experience currency exchange risk with respect to foreign currency denominated expenses. In order to partially offset the risks associated with the effects of certain foreign currency exposures, NetScout has established a program that utilizes foreign currency forward contracts. Under this program, increases or decreases in foreign currency exposures are partially offset by gains or losses on forward contracts, to mitigate the impact of foreign currency transaction gains or losses.
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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)

The Company does not use forward contracts to engage in currency speculation. All outstanding foreign currency forward contracts are recorded at fair value at the end of each fiscal period.
The Company had foreign currency losseslosses of $2.0$5.5 million $4.1, $0.7 million and $2.5$2.0 million for the fiscal years ended March 31, 2019, 20182021, 2020 and 2017,2019, respectively. These amounts are included in other expense, net.
Advertising Expense
NetScout recognizes advertising expense as incurred. Advertising expense was $9.4$8.7 million, $6.5$8.3 million and $8.1$9.4 million for the fiscal years ended March 31, 2019, 20182021, 2020 and 2017,2019, respectively.
Comprehensive Income (Loss)
Comprehensive income (loss) consists of net income (loss) and other comprehensive income (loss). Other comprehensive income (loss) typically consists of unrealized gains and losses on marketable securities, unrealized gain (loss)and losses on hedge contracts, actuarial gains and losses, and foreign currency translation adjustments.
Income Taxes
NetScout accounts for its income taxes under the asset and liability method. Under the asset and liability method, deferred tax assets and liabilities are recognized based on anticipated future tax consequences attributable to differences between financial statement carrying amounts of assets and liabilities and their respective tax basis, as well as the effect of any net operating loss and tax credit carryforwards. Income tax expense is comprised of the current tax liability or benefit and the change in deferred tax assets and liabilities. NetScout evaluates the recoverability of deferred tax assets by considering all positive and negative evidence relating to future profitability. NetScout weighs objective and verifiable evidence more heavily in this analysis. In situations where NetScout concludes that it does not have sufficient objective and verifiable evidence to support the realizability of the deferred tax asset, NetScout creates a valuation allowance against it.
Recent Accounting Standards
In August 2018,March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Accounting Standards Board (FASB)Reporting. The amendments provide optional guidance for a limited time to ease the potential burden in accounting for reference rate reform. The new guidance provides optional expedients and exceptions for applying U.S. GAAP to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. The amendments apply only to contracts and hedging relationships that reference LIBOR or another reference rate expected to be discontinued due to reference rate reform. In January 2021, the FASB issued Accounting Standards Update 2018-15, Intangibles – GoodwillASU 2021-01, Reference Rate Reform, which clarifies the scope and Other – Internal-Use Software (Subtopic 350-40): Customer’sapplication of certain optional expedients and exceptions regarding the original guidance. ASU 2021-01 may be applied prospectively through December 31, 2022. The expedients and exceptions provided by the amendments do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022, that an entity has elected certain optional expedients for and that are retained through the end of the hedging relationship. The adoption is not expected to have a material impact on the Company's financial position, results of operations, and disclosures.
In January 2020, the FASB issued ASU 2020-01, Investments-Equity Securities (Topic 321), Investments-Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815) - Clarifying the Interactions between Topic 321, Topic 323, and Topic 815. This guidance addresses accounting for the transition into and out of the equity method and provides clarification of the interaction of rules for equity securities, the equity method of accounting, and forward contracts and purchase options on certain types of securities. This standard is effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2020. Early adoption is permitted. ASU 2020-01 is effective for NetScout beginning April 1, 2021. The adoption is not expected to have a material impact on the Company's financial position, results of operations, and disclosures.
In December 2019, the FASB issued ASU 2019-12, Simplifying the Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (ASU 2018-15). ThisIncome Taxes. ASU clarifies2019-12 simplifies the accounting treatment for implementation costs for cloud computing arrangements (hosting arrangements) that is a service contract. Thisincome taxes, eliminates certain exceptions within ASC 740, Income Taxes, and clarifies certain aspects of the current guidance to promote consistency among reporting entities. ASU 2019-12 is effective for fiscal years beginning after December 15, 2019, including interim periods2020. ASU 2019-12 is effective for NetScout beginning April 1, 2021. Most amendments within that fiscal year. The Company adopted ASU 2018-15 effective July 1, 2018.the standard are required to be applied on a prospective basis, while certain amendments must be applied on a retrospective or modified retrospective basis. The adoption has had an immaterialis not expected to have a material impact toon the consolidatedCompany's financial statements for the twelve months ended March 31, 2019.position, results of operations, and disclosures.

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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)
 



In August 2018, the FASB issued ASU 2018-14, Compensation – Retirement Benefits – Defined Benefit Plans – General (Subtopic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans. This ASU adds, modifies and clarifies several disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. ThisThe Company adopted the guidance is effective for fiscal years ending after December 15, 2020. ASU 2018-14 is effective for NetScout beginningas of April 1, 2021. Early2020. The adoption is permitted. The Company is currently assessingdid not have a material impact on the effect that ASU 2018-14 will have on itsCompany's consolidated financial position, results of operations, and disclosures.statements.
In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement. ASU 2018-13 adds, modifies and removes several disclosure requirements relative to the three levels of inputs used to measure fair value in accordance with Topic 820, Fair Value Measurement. ThisThe Company adopted the guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within that fiscal year. ASU 2018-13 is effective for NetScout beginningas of April 1, 2020. EarlyThe adoption is permitted. The Company is currently assessing the effect that ASU 2018-13 will have on its financial position, results of operations, and disclosures.
In February 2018, the FASB issued ASU 2018-02, Reclassification of Certain Tax Effects From Accumulated Other Comprehensive Income. ASU 2018-02 amends ASC 220, Income Statement - Reporting Comprehensive Income, to allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Act. In addition, under the ASU 2018-02, the Company may be required to provide certain disclosures regarding stranded tax effects. ASU 2018-02 is effective for years beginning after December 15, 2018, and interim periods within those fiscal years. ASU 2018-02 is effective for the Company beginning April 1, 2019. Early adoption is permitted. The Company doesdid not believe the adoption of ASU 2018-02 will have a material impact on itsthe Company's consolidated financial statements.
In August 2017, the FASB issued ASU 2017-12, Derivatives and Hedging (Topic 815), Targeted Improvements to Accounting for Hedging Activities (ASU 2017-12). ASU 2017-12 intends to better align an entity's risk management activities and financial reporting for hedging relationships through changes to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedge results. The amendments expand and refine hedge accounting for both non-financial and financial risk components and align the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. This standard is effective for financial statements issued for fiscal years beginning after December 15, 2018, with early adoption permitted. ASU 2017-12 is effective for the Company beginning April 1, 2019. The Company does not believe the adoption of ASU 2017-12 will have a material impact on its consolidated financial statements.
In FebruaryJune 2016, the FASB issued ASU 2016-02, Leases2016-13, Financial Instruments—Credit Losses (Topic 842)326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13) and also issued subsequent amendments to the initial guidance: ASU 2017-13,2018-19, ASU 2018-10,2019-04, ASU 2018-11,2019-05, ASU 2018-202019-11 and ASU 2019-012020-02 (collectively, Topic 842)326). ASC 842 aims to increase transparencyTopic 326 requires measurement and comparability among organizationsrecognition of expected credit losses for financial assets held. Topic 326 replaces the existing incurred loss impairment model with respect to accounting for leases. Lesseesan expected loss methodology, which will recognize a right-of-use (ROU) asset and a lease liability measured at the present valueresult in more timely recognition of lease payments for virtually all of their leases. Short term leases with a term of 12 months or less are not required to be recognized. ASC 842 also requires disclosure of key information about leasing arrangements. ASC 842 will be effective for fiscal years beginning after December 15, 2018, including interim periods within such fiscal years. Early adoption is permitted.credit losses. The Company adopted the new standard onguidance prospectively as of April 1, 2019 using the effective date as the date of initial application. Consequently, financial information will2020. The adoption did not be updatedresult in a cumulative adjustment to retained earnings and disclosures required under the new standard willdid not be provided for dates and periods before April 1, 2019.
The new standard provides a number of optional practical expedients in transition. The Company elected the package of practical expedients, which among other things, allows the carryforward of the historical lease classification. Further, the Company elected the practical expedients to combine lease and non-lease components, and to not recognize ROU assets and lease liabilities for short-term leases.
The Company currently anticipates that the adoption of this new standard will materially impact the consolidated balance sheets by recognizing new ROU assets and lease liabilities for operating leases with the most significant impact from the recognition of ROU assets and lease liabilities related to the Company's office space operating leases. Thehave an impact on the Company's results of operations and cash flows is not expectedconsolidated financial statements other than with respect to be material.the updated disclosure requirements.
The Company has implemented a new lease accounting system and is updating processes and controls in preparation for the adoption of the new standard, including the requirement to provide significant new disclosures about the Company's leasing activities. Please refer to Note 18, "Commitments and Contingencies" for additional information about the Company's leases, including the future minimum lease payments for operating leases at March 31, 2019.

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Notes to Consolidated Financial Statements—(Continued)


In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers: Topic 606 (Topic 606). Topic 606 supersedes the revenue recognition requirements in Topic 605, Revenue Recognition, and requires entities to recognize revenue when control of the promised goods or services is transferred to customers at an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. The Company adopted Topic 606 as of April 1, 2018 using the modified retrospective transition method. Please refer to Note 3, "Revenue Recognition" for further details.
NOTE 3 - REVENUE RECOGNITION
Revenue from Contracts with Customers
In May 2014, the FASB issued Topic 606, which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. Topic 606 replaced most existing revenue recognition guidance under GAAP. The new standard introduces a five-step process to be followed in determining the amount and timing of revenue recognition. It also provides guidance on accounting for costs incurred to obtain or fulfill contracts with customers and establishes disclosure requirements which are more extensive than those required under prior GAAP.
Topic 606 became effective for the Company on April 1, 2018. The Company elected to use the modified retrospective transition approach. Therefore, the comparative financial information has not been restated and continues to be reported under the accounting standards in effect for those periods.
Revenue Recognition Policy
The Company exercises judgment and uses estimates in connection with determining the amounts of product and servicesservice revenues to be recognized in each accounting period.
The Company derives revenues primarily from the sale of network management tools and security solutions for service provider and enterprise customers, which include hardware, software and service offerings. The majority of the Company’sCompany's product sales consist of software only offerings and offerings which include hardware productsappliances with embedded software that are essential to providing customers the intended functionality of the solutions. The Company also sells software offerings decoupled from the underlying hardware and software solutions to provide customers with enhanced functionality.
The Company accounts for revenue once a legally enforceable contract with a customer has been approved by the parties and the related promises to transfer products or services have been identified. A contract is defined by the Company as an arrangement with commercial substance identifying payment terms, each party’s rights and obligations regarding the products or services to be transferred and the amount the Company deems probable of collection. Customer contracts may include promises to transfer multiple products and services to a customer. Determining whether the products and services are considered distinct performance obligations that should be accounted for separately or as one combined performance obligation may require significant judgment. Revenue is recognized when control of the products or services are transferred to the Company's customers, in an amount that reflects the consideration the Company expects to be entitled to in exchange for products and services.
Product revenue is typically recognized upon shipment, provided a legally enforceable contract exists, control has passed to the customer, and in the case of software products, when the customer has the rights and ability to access the software,software; and collection of the related receivable is probable. If any significant obligations to the customer remain post-delivery, typically involving obligations relating to installation and acceptance by the customer, revenue recognition is deferred until such
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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)

obligations have been fulfilled. The Company's service offerings include installation, integration, extended warranty and maintenance services, post-contract customer support, stand-ready software-as-a-service (SAAS) and other professional services including consulting and training. The Company generally provides software and/or hardware support as part of product sales. Revenue related to the initial bundled software and hardware support is recognized ratably over the support period. In addition, customers can elect to purchase extended support agreements for periods after the initial software/hardware warranty expiration. Support services generally include rights to unspecified upgrades (when and if available), telephone and internet-based support, updates, bug fixes and hardware repair and replacement. Consulting services are recognized upon delivery or completion of performance depending on the terms of the underlying contract. Reimbursements of out-of-pocket expenditures incurred in connection with providing consulting services are included in services revenue, with the offsetting expense recorded in cost of service revenue. Training services include on-site and classroom training. Training revenues are recognized upon delivery of the training.

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Notes to Consolidated Financial Statements—(Continued)


Generally, the Company's contracts are accounted for individually. However, when contracts are closely interrelated and dependent on each other, it may be necessary to account for two or more contracts as one to reflect the substance of the group of contracts.
Bundled arrangements are concurrent customer purchases of a combination of the Company's product and service offerings that may be delivered at various points in time. The Company allocates the transaction price among the performance obligations in an amount that depicts the relative standalone selling prices (SSP) of each obligation. Judgment is required to determine the SSP for each distinct performance obligation. The Company uses a range of amounts to estimate SSP when it sells each of the products and services separately based on the element’s historical pricing. The Company also considers its overall pricing objectives and practices across different sales channels and geographies, and market conditions. Generally, the Company has established SSP for a majority of its service elements based on historical standalone sales. In certain instances, the Company has established SSP for services based upon an estimate of profitability and the underlying cost to fulfill those services. Further, for certain service engagements, the Company considers quoted prices as part of multi-element arrangements of those engagements as a basis for establishing SSP. SSP has been established for product elements as the average or median selling price the element was recently sold for, whether sold alone or sold as part of a multiple element transaction. The Company reviews sales of the product elements on a quarterly basis and updates, when appropriate, its SSP for such elements to ensure that it reflects recent pricing experience. The Company's products are distributed through its direct sales force and indirect distribution channels through alliances with resellers and distributors. Revenue arrangements with resellers and distributors are recognized on a sell-in basis; that is, when control of the product transfers to the reseller or distributor. The Company records consideration given to a reseller or distributorcustomer as a reduction of revenue to the extent they have recorded revenue from the reseller or distributor.customer. With limited exceptions, the Company's return policy does not allow product returns for a refund. Returns have been insignificant to date. In addition, the Company has a history of successfully collecting receivables from its resellers and distributors.

Financial Statement Impact of Adoption
The cumulative impact of applying Topic 606 to all contracts with outstanding performance obligations as of April 1, 2018 was recorded as an adjustment to retained earnings as ofDuring the adoption date. As a result of applying the modified retrospective approach to adopt the new standard, the following adjustments were made to accounts on the consolidated balance sheet at April 1, 2018 (in thousands):
 Balance at March 31, 2018 Adjustments from Adopting Topic 606 Balance at April 1, 2018
ASSETS:     
     Accounts receivable and unbilled costs$213,438  $1,195  $214,633 
     Prepaid expenses and other current assets33,502  4,626  38,128 
     Other assets12,866  4,748  17,614 
LIABILITIES:     
     Deferred revenue and customer deposits301,925  (30,227) 271,698 
     Deferred tax liability151,563  7,124  158,687 
     Long-term deferred revenue and customer deposits91,409  (1,252) 90,157 
STOCKHOLDERS' EQUITY:     
     Retained earnings396,493  34,924  431,417 
In connection with the adoption of Topic 606, the Company increased its retained earnings by $34.9 million, due to uncompleted contracts at April 1, 2018, of which $34.9 million of revenue will not be recognized in future periods under the new standard. The Company capitalized $7.1 million of incremental sales commission costs on the adoption date directly related to obtaining customer contracts and is amortizing these costs as it satisfies the underlying performance obligations, which for certain contracts can include anticipated renewal periods. As of April 1, 2018, the acceleration of revenue that was deferred under prior guidance was primarily attributable to no longer requiring the separation of promised goods or services, such as software licenses, technical support, specified and unspecified upgrade rights on the basis of vendor specific objective evidence, and the impact of allocating the transaction price to the software performance obligations in the contract on a relative basis using standalone selling price rather than allocating under the residual method, which allocates the entire arrangement discount to the delivered performance obligations. In addition, revenue from perpetual licenses and associated hardware with extended payment terms and term licenses are now recognized when control is transferred to the customer, the point in time

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Notes to Consolidated Financial Statements—(Continued)


when the customer can use and benefit from the license. Previouslyfiscal year ended March 31, 2021, the Company recognized revenue over the termrevenue of the agreements as payments became due or earlier if prepaid.
The net change in deferred income taxes of $7.1$262.5 million is primarily due to the deferred tax effects resulting from the adjustment to retained earnings for the cumulative effect of applying Topic 606 to active contracts as of the adoption date.
Impact of Topic 606 on Financial Statement Line Items
The impact of adoption of Topic 606 on the Company's consolidated balance sheet at March 31, 2019 and on the Company's consolidated statement of operations for the twelve months ended March 31, 2019 was as follows (in thousands):
 March 31, 2019
 As Reported Balance without Adoption of Topic 606 Effect of Change Higher (Lower)
ASSETS:     
     Accounts receivable and unbilled costs235,318  229,708  5,610 
     Inventories and deferred costs26,270  26,418  (148)
     Prepaid expenses and other current assets35,658  31,810  3,848 
     Other assets16,988  12,074  4,914 
LIABILITIES:    
 
     Deferred revenue and customer deposits272,508  306,799  (34,291)
     Deferred tax liability124,229  121,535  2,694 
     Long-term deferred revenue and customer deposits94,619  106,025  (11,406)
STOCKHOLDERS' EQUITY:     
     Retained earnings358,093  339,765  18,328 
  Twelve Months Ended March 31, 2019
  As Reported Balance without Adoption of Topic 606 Effect of Change Higher (Lower)
Total revenues $909,918
 $888,950
 $20,968
Total cost of revenue 254,127
 253,979
 148
Sales and marketing expense 291,870
 292,080
 (210)
Income tax benefit (19,588) (24,022) 4,434
Net loss (73,324) (89,920) 16,596
Basic net loss per share $(0.93) $(1.14) $0.21
Diluted net loss per share $(0.93) $(1.14) $0.21
During the twelve months ended March 31, 2019, the Company recognized revenue of $260.1 million related related to the Company's deferred revenue balance reported as of April 1, 2018. The adoption of Topic 606 had no impact to net cash provided by or used in operating, investing and financing activities on the Company’s consolidated statements of cash flows during the twelve months endedat March 31, 2019.2020.
Performance Obligations
Customer contracts may include promises to transfer multiple products and services to a customer. Determining whether the products and services are considered distinct performance obligations that should be accounted for separately or as one combined performance obligation may require significant judgment. The transaction price is allocated among performance obligations in bundled contracts in an amount that depicts the relative standalone selling prices of each obligation.
For contracts involving distinct hardware and software licenses, the performance obligations are satisfied at a point in time when control is transferred to the customer. For standalone maintenance and post-contract support (PCS) the performance obligation is satisfied ratably over the contract term as a stand-ready obligation. For consulting and training services, the performance obligation may be satisfied over the contract term as a stand-ready obligation, satisfied over a period of time as those services are delivered, or satisfied at the completion of the service when control has transferred, or the services have expired unused.

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Notes to Consolidated Financial Statements—(Continued)


Payments for hardware, software licenses, one-year maintenance, PCS and consulting services, are typically due up front with payment terms of 30 to 90 days. However, the Company does have contracts pursuant to which billings occur ratably over a period of years following the transfer of control for the contracted performance obligations. Payments on multi-year maintenance, PCS and consulting services are typically due in annual installments over the contract term. The Company did not have any material variable consideration such as obligations for returns, refunds or warranties at March 31, 2019.2021.
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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)

At March 31, 2019,2021, the Company had total deferred revenue of $367.1$373.1 million, which represents the aggregate total contract price allocated to undelivered performance obligations. The Company expects to recognize $272.5$269.8 million, or 74%72%, of this revenue during the next 12 months, and expects to recognize the remaining $94.6$103.3 million, or 26%28%, of this revenue thereafter.
NetScout expects that the amount of billed and unbilled deferred revenue will change from quarter to quarter for several reasons, including the specific timing, duration and size of large customer support and service agreements, varying billing cycles of such agreements, the specific timing of customer renewals, and foreign currency fluctuations. The Company did not have anymaterial significant financing components, or variable consideration or performance obligations satisfied in a prior period recognized during the twelve months ended March 31, 2019.2021.
Contract Balances
The Company receivesmay receive payments from customers based on a billing scheduleschedules as established by the Company’sCompany's contracts. Contract assets relate to performance obligations where control has transferred to the customer in advance of scheduled billings. Upon adoption, theThe Company recordedrecords unbilled accounts receivable representing the right to consideration in exchange for goods or services that have been transferred to a customer conditional on the passage of time. The Company did not record any contract assets upon adoption. Deferred revenue relates to scenarios where billings occur before all performance obligations are delivered or payments are received in advance of performance under the contract. The following table provides information about contract assets and liabilities (in thousands):
 April 1, 2018 March 31, 2019 Increase/ (Decrease)
ASSETS:     
     Customer accounts receivable$205,299  $240,482  35,183 
     Unbilled receivables4,338  3,354  (984)
     Other receivables4,996  3,577  (1,419)
     Long-term unbilled receivables2,254  2,754  500 
 $216,887 
$250,167 
33,280 
LIABILITIES:     
     Deferred revenue$271,698  $272,508  $810 
     Deferred revenue, long-term90,157  94,619  4,462 
 $361,855 
$367,127 
$5,272 
Costs to Obtain Contracts
The Company has determined that the only significant incremental costs incurred to obtain contracts with customers within the scope of Topic 606 are sales commissions paid to its employees. Sales commissions are recorded as an asset and amortized to expense ratably over the remaining performance periods of the related contracts with remaining performance obligations. The Company applies the practical expedient in Topic 606 and expenses costs as incurred for sales commissions when the amortization period would have been one year or less.
At March 31, 2019,2021, the consolidated balance sheet included $6.4included $7.4 million in assets related to sales commissions to be expensed in future periods. A balance of $3.8$4.1 million waswas included in prepaid expenses and other current assets, and a balance of $2.6$3.3 million was included as other assets in the Company's consolidated balance sheet at March 31, 2019.2021. At March 31, 2020, the consolidated balance sheet included $7.2 million in assets related to sales commissions to be expensed in future periods. A balance of $3.9 million was included in prepaid expenses and other current assets, and a balance of $3.3 million was included in other assets in the Company's consolidated balance sheet at March 31, 2020.
During the twelve months ended March 31, 2019,2021 and 2020, the Company recognized $6.3 million and $6.5 million of amortization related to this sales commission asset, which is included in the sales and marketing expense line in the Company's consolidated statements of operations.

Allowance for Credit Losses
The Company continually monitors collections from its customers. The Company evaluates the collectability of its accounts receivable and determines the appropriate allowance for credit losses based on a combination of factors, including but not limited to, analysis of the aging schedules, past due balances, historical collection experience and prevailing economic conditions.
The following table summarizes the activity in the allowance for credit losses (in thousands):

Balance at March 31, 2020$1,350 
Provision for allowance for credit losses48 
Recoveries and other adjustments(733)
Write off charged against the allowance for credit losses(249)
Balance at March 31, 2021$416 



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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)






NOTE 4 – CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES
Cash and cash equivalents mainly consisted of U.S government and municipal obligations, commercial paper, corporate bonds, money market instruments and cash maintained with various financial institutions at March 31, 20192021 and 2018.2020.
Cash, Cash Equivalents and Restricted Cash
The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the consolidated statements of cash flows (in thousands):
March 31, 2019 March 31, 2018 March 31, 2017 March 31, 2016March 31, 2021March 31, 2020March 31, 2019March 31, 2018
Cash and cash equivalents$409,632
 $369,821
 $304,880
 $210,711
Cash and cash equivalents$467,176 $338,489 $409,632 $369,821 
Restricted cash188
 910
 846
 186
Restricted cash$1,748 188 910 
Total cash, cash equivalents and restricted cash$409,820
 $370,731
 $305,726
 $210,897
Total cash, cash equivalents and restricted cash$467,176 $340,237 $409,820 $370,731 
The Company's restricted cash includes cash balances which are legally or contractually restricted. The Company's restricted cash is included within prepaid and other current assets and consists of amounts related to holdbacks associated with prior acquisitions.

Marketable Securities
The following is a summary of marketable securities held by NetScout at March 31, 20192021 classified as short-term and long-term (in thousands):
Amortized
Cost
 
Unrealized
Gains
 
Fair
Value
Amortized
Cost
Unrealized
Gains
Fair
Value
Type of security:     Type of security:
U.S. government and municipal obligations$27,610
 $12
 $27,622
U.S. government and municipal obligations$3,571 $$3,578 
Commercial paper48,722
 
 48,722
Commercial paper5,699 5,699 
Total short-term marketable securities76,332
 12
 76,344
Total short-term marketable securities9,270 9,277 
Corporate bonds1,007
 5
 1,012
Total long-term marketable securities1,007
 5
 1,012
Total long-term marketable securities
Total marketable securities$77,339
 $17
 $77,356
Total marketable securities$9,270 $$9,277 
 
The following is a summary of marketable securities held by NetScout at March 31, 2018,2020, classified as short-term and long-term (in thousands):
Amortized
Cost
 
Unrealized
Losses
 
Fair
Value
Amortized
Cost
Unrealized
Gains
Fair
Value
Type of security:     Type of security:
U.S. government and municipal obligations$42,246
 $(60) $42,186
U.S. government and municipal obligations$28,621 $107 $28,728 
Commercial paper33,003
 
 33,003
Commercial paper14,644 14,644 
Corporate bonds2,754
 (2) 2,752
Corporate bonds4,587 10 4,597 
Total short-term marketable securities78,003
 (62) 77,941
Total short-term marketable securities47,852 117 47,969 
U.S. government and municipal obligationsU.S. government and municipal obligations2,562 51 2,613 
Total long-term marketable securities
 
 
Total long-term marketable securities2,562 51 2,613 
Total marketable securities$78,003
 $(62) $77,941
Total marketable securities$50,414 $168 $50,582 

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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)






Contractual maturities of the Company’sCompany's marketable securities held at March 31, 20192021 and March 31, 20182020 (in thousands) were as follows (in thousands):follows:
March 31,
2021
March 31,
2020
Available-for-sale securities:
Due in 1 year or less$9,277 $47,969 
Due after 1 year through 5 years2,613 
$9,277 $50,582 

 March 31,
2019
 March 31,
2018
Available-for-sale securities:   
Due in 1 year or less$76,344
 $77,941
Due after 1 year through 5 years1,012
 
 $77,356
 $77,941

NOTE 5 – FAIR VALUE MEASUREMENTS
The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value. Level 1 refers to fair values determined based on quoted prices in active markets for identical assets. Level 2 refers to fair values estimated using significant other observable inputs, and Level 3 includes fair values estimated using significant unobservable inputs. The following tables present the Company’sCompany's financial assets and liabilities measured on a recurring basis using the fair value hierarchy at March 31, 20192021 and 20182020 (in thousands):
 Fair Value Measurements at
March 31, 2021
 Level 1Level 2Level 3Total
ASSETS:
Cash and cash equivalents$467,176 $$$467,176 
U.S. government and municipal obligations2,539 1,039 3,578 
Commercial paper5,699 5,699 
Derivative financial instruments57 57 
$469,715 $6,795 $$476,510 
LIABILITIES:
Derivative financial instruments(191)(191)
$$(191)$$(191)
Fair Value Measurements at Fair Value Measurements at
March 31, 2019March 31, 2020
Level 1 Level 2 Level 3 Total Level 1Level 2Level 3Total
ASSETS:       ASSETS:
Cash and cash equivalents$409,632
 $
 $
 $409,632
Cash and cash equivalents$338,489 $$$338,489 
U.S. government and municipal obligations10,732
 16,890
 
 27,622
U.S. government and municipal obligations31,341 31,341 
Commercial paper
 48,722
 
 48,722
Commercial paper14,644 14,644 
Corporate bonds1,012
 
 
 1,012
Corporate bonds4,597 4,597 
Derivative financial instruments
 58
 
 58
Contingent consideration
 
 762
 762
$421,376

$65,670

$762

$487,808
$374,427 $14,644 $$389,071 
LIABILITIES:       LIABILITIES:
Contingent purchase considerationContingent purchase consideration$$$(1,748)$(1,748)
Derivative financial instruments$
 $(68) $
 $(68)Derivative financial instruments(49)(49)
$
 $(68) $
 $(68)$$(49)$(1,748)$(1,797)
 
F-19

 Fair Value Measurements at
 March 31, 2018
 Level 1 Level 2 Level 3 Total
ASSETS:       
Cash and cash equivalents$369,821
 $
 $
 $369,821
U.S. government and municipal obligations14,513
 27,673
 
 42,186
Commercial paper
 33,003
 
 33,003
Corporate bonds2,752
 
 
 2,752
Derivative financial instruments
 122
 
 122
 $387,086
 $60,798
 $
 $447,884
LIABILITIES:       
Contingent purchase consideration$
 $
 $(5,464) $(5,464)
Derivative financial instruments
 (40) 
 (40)
 $
 $(40) $(5,464) $(5,504)


NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)
 



This hierarchy requires the Company to use observable market data, when available, and to minimize the use of unobservable inputs when determining fair value. On a recurring basis, the Company measures certain financial assets and liabilities at fair value, including marketable securities and derivative financial instruments.
The Company’sCompany's Level 1 investments are classified as such because they are valued using quoted market prices or alternative pricing sources with reasonable levels of price transparency.
The Company’sCompany's Level 2 investments are classified as such because fair value is calculated using market observable data for similar but not identical instruments, or a discounted cash flow model using the contractual interest rate as compared to the underlying interest yield curve. The Company classifies municipal obligations as Level 2 because the fair values are determined using quoted prices from markets the Company considers to be inactive. Commercial paper is classified as Level 2 because the Company uses market information from similar but not identical instruments and discounted cash flow models based on interest rate yield curves to determine fair value. The Company's derivative financial instruments consist of forward foreign exchange contracts and are classified as Level 2 because the fair values of these derivatives are determined using models based on market observable inputs, including spot prices for foreign currencies and credit derivatives, as well as an interest rate factor.
The Company's Level 3 assets consistliabilities at March 31, 2020 consisted of contingent purchase consideration related to the 2 acquisitions that occurred during the fiscal year 2020. The contingent purchase consideration related to the 2 acquisitions represented amounts deposited into escrow accounts, which were established to cover damages NetScout may have suffered related to any liabilities that NetScout did not agree to assume or as a result of the breach of representations and warranties of the sellers as described in the acquisition agreements. The contingent purchase consideration of $0.7 million and $1.0 million related to the Gigavation and Eastwind acquisitions, respectively were included as accrued other in the Company's consolidated balance sheet at March 31, 2020. The $0.7 million related to the Gigavation acquisition was paid to the seller in February 2021. The $1.0 million related to the Eastwind acquisition was paid to the seller in April 2020.
During fiscal year 2019, the Company recorded a contingent consideration related to the divestiture of the Company's handheld network test (HNT) tools business in September 2018. The contingent consideration representsrepresented potential future earnout payments to the Company of up to $4.0 million over two years that arewere contingent on the HNT tools business achieving certain milestones. The fair value of the contingent consideration of $2.3 million was recognized on the acquisitiondivestiture date and was measured using unobservable (Level 3) inputs. The Company recordedrecorded an $0.8 million and a $1.6 million change in the fair value of the contingent consideration, which is included in other expense, net within the Company's consolidated statement of operations for the yearyears ended March 31, 2019. The $0.8 million of contingent consideration is included in other assets within the Company’s consolidated balance sheet at March 31, 2019.
The Company's Level 3 liabilities at March 31, 2018 consist of contingent purchase consideration.
The Company's contingent purchase consideration at March 31, 2018 included $523 thousand related to the acquisition of certain assets2020 and liabilities of Efflux Systems, Inc. (Efflux) in the second quarter of fiscal year 2018. The contingent purchase consideration was released from escrow to the sellers in July 2018.
The fair value of contingent purchase consideration at March 31, 2018 included $4.9 million related to the acquisition of Simena LLC (Simena) in November 2011 for future consideration to be paid to the seller. The contingent purchase consideration was included as a contingent liability within accrued other in the Company's consolidated balance sheet at March 31, 2018. The contingent purchase consideration was paid to the seller in November 2018.2019.
The following table sets forth a reconciliation of changes in the fair value of the Company’s Level 3 financial liabilities for the fiscal year ended March 31, 20192021 (in thousands):
Contingent
Purchase
Consideration
Balance at March 31, 2020$(1,748)
Additions to Level 3— 
Payments made1,748 
Balance at March 31, 2021$

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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)

 Contingent
Purchase
Consideration
Contingent Consideration
Balance at March 31, 2018$(5,464)$
Contingent consideration pursuant to divestiture of the HNT tools business
2,257
Change in fair value of contingent consideration(102)(1,495)
Payments made5,566

Balance at March 31, 2019$
$762
Deal-related compensation expenseThe following table sets forth a reconciliation of changes in the fair value of the Company’s Level 3 financial assets and accretion charges related to the contingent purchase considerationliabilities for the fiscal year ended March 31, 2019 were $102 thousand and were included within research and development expense. 2020 (in thousands):
Contingent
Purchase
Consideration
Contingent
Consideration
Balance at March 31, 2019$$762 
Additions to Level 3(1,800)— 
Change in fair value of contingent consideration— (762)
Payments received52 — 
Balance at March 31, 2020$(1,748)$
Accretion income related to the contingent consideration received as partial consideration for the divestiture of the HNT tools business for the fiscal year ended March 31, 20192020 was $119$36 thousand and was included within interest income.

Table of Contents
NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)


The following table sets forth a reconciliation of changes in the fair value of the Company’s Level 3 financial liabilities for the year ended March 31, 2018 (in thousands):
 
Contingent
Purchase
Consideration
Balance at March 31, 2017$(5,449)
Additions to Level 3(523)
Change in fair value of contingent consideration(152)
Payments made660
Balance at March 31, 2018$(5,464)
Deal related compensation expense and accretion charges related to the contingent purchase consideration for the fiscal year ended March 31, 2018 were $152 thousand and were included within research and development expense.


NOTE 6 – INVENTORIES
Inventories are stated at the lower of actual cost or net realizable value. Cost is determined by using the FIFO method. Inventories consistconsisted of the following (in thousands):
 March 31,
 20212020
Raw materials$13,189 $15,311 
Work in process16 819 
Finished goods6,168 5,376 
Deferred costs3,440 721 
$22,813 $22,227 
 March 31,
 2019 2018
Raw materials$14,432
 $20,860
Work in process1,181
 2,589
Finished goods7,738
 8,500
Deferred costs2,919
 2,825
 $26,270
 $34,774


NOTE 7 – FIXED ASSETS
Fixed assets consistconsisted of the following (in thousands):
    
Estimated Useful Life in Years March 31, Estimated Useful Life in YearsMarch 31,
 2019 2018 20212020
Furniture and fixtures3-7 $9,373
 $6,596
Furniture and fixtures3-7$9,742 $9,561 
Computer equipment and internal use software3-5 158,797
 147,237
Computer equipment and internal use software3-5177,098 170,518 
Leasehold improvements (1)Leasehold improvements (1)up to 1253,980 51,910 
Demonstration and spare part units2-5 17,928
 31,338
Demonstration and spare part units2-517,968 19,626 
Leasehold improvements (1) up to 12 46,662
 19,340
 232,760
 204,511
258,788 251,615 
Less – accumulated depreciation (173,809) (152,000)Less – accumulated depreciation(210,314)(193,900)
 $58,951
 $52,511
$48,474 $57,715 
(1) Leasehold improvements are depreciated over the shorter of the lease term or anticipated useful life of the improvement.
A typographical error in the prior year presentation of the above disclosure has been corrected in the current period.
Depreciation expense was $27.4$22.4 million, $34.7$23.4 million and $33.0$27.4 million for the fiscal years ended March 31, 2019, 20182021, 2020 and 2017,2019, respectively.


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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)
 





NOTE 8 – ACQUISITIONS & DIVESTITURES
Gigavation Acquisition
On February 5, 2020 (the Gigavation Closing Date), the Company acquired 100% of the common stock of Gigavation Incorporated, a cybersecurity company for $8.0 million. Gigavation's solutions provide security to device communication protocols, end point protection and security analytics. The Gigavation technology and engineering talent have been integrated into our service assurance products in order to support the ongoing enhancement of that portfolio.
The Company completed the accounting related to the Gigavation acquisition as of March 31, 2020. Goodwill and intangible assets recorded as part of the acquisition are not deductible for tax purposes. The Company determined Gigavation's results of operations are not material. As such, the pro forma information is not required.
The following table summarizes the allocation of the purchase price (in thousands):


Initial cash payment$7,200 
Estimated fair value of contingent purchase consideration800 
Estimated purchase price$8,000 

The following table reflects the estimated fair value of assets acquired and liabilities assumed (in thousands):

Cash$
Accounts receivable209 
Prepaid and other current assets
Intangible assets4,760 
Deferred tax liability(693)
Accounts payable(50)
Accrued other liabilities(54)
Goodwill$3,816 

Of the total consideration, $0.8 million was deposited into an escrow account. The escrow account was established to cover damages NetScout may have suffered related to any liabilities that NetScout did not agree to assume or as a result of the breach of representations and warranties of the seller as described in the acquisition agreement. Generally, indemnification claims that Gigavation would be liable for are limited to the total amount of the escrow account, which shall be the sole source for the satisfaction of any damages to the Company for such claims, but such limitation does not apply with respect to the seller's breach of certain fundamental representations or related to other specified indemnity items, for which certain of Gigavation's shareholders may be liable for additional amounts in excess of the escrow amount. During the fiscal year ended March 31, 2020, $0.1 million was withdrawn from the escrow account to satisfy an indemnification claim. The remaining $0.7 million was paid to the seller in February 2021.
In connection with the Gigavation acquisition, certain former employees of Gigavation received restricted stock units. The restricted stock units issued are considered new share-based payment awards granted by NetScout to the former employees of Gigavation. NetScout accounted for these new awards separately from the business combination. The Company recognized share-based compensation net of an estimated forfeiture rate and only recognized compensation cost for those shares expected to vest on a straight-line basis over the requisite service period of the award.
The fair value of the intangible asset was based on a valuation using an income approach. The underlying assumptions include the estimated cash flows to be generated by the technology purchased as part of the acquisition less any returns on contributory assets, if any. This fair value measurement was based on significant inputs not observable in the market and thus represents Level 3 fair value measurements.
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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)


The following table reflects the fair value of the acquired identifiable intangible asset and related estimated useful life (in thousands):


Fair ValueUseful Life (Years)
Developed technology$4,760 10

The weighted average useful life of the developed technology acquired from Gigavation is 10 years.

Eastwind Acquisition
On April 3, 2019 (the Eastwind Closing Date), the Company completed the acquisition of certain assets and liabilities of Eastwind for $5.2 million. Eastwind's breach analytics cloud analyzes data to identify malicious activity, insider threats and data leakage.
The Company completed the purchase accounting related to the Eastwind acquisition as of June 30, 2019. Goodwill and intangible assets recorded as part of the acquisition are deductible for tax purposes. The Company determined Eastwind's results of operations are not material. As such, the pro forma information is not required.
Initial cash payment$4,154 
Estimated fair value of contingent purchase consideration1,000 
Estimated purchase price$5,154 

The following table reflects the estimated fair value of assets acquired and liabilities assumed (in thousands):

Property, plant and equipment$17 
Intangible assets4,230 
Accrued other liabilities(96)
Goodwill$1,003 
Of the total consideration, $1.0 million was deposited into an escrow account. The escrow account was established to cover damages NetScout may have suffered related to any liabilities that NetScout did not agree to assume or as a result of the breach of representations and warranties of the seller as described in the acquisition agreement. Generally, indemnification claims that Eastwind would be liable for are limited to the total amount of the escrow account, which shall be the sole source for the satisfaction of any damages to the Company for such claims, but such limitation does not apply with respect to the seller's breach of certain fundamental representations or related to other specified indemnity items, for which certain of Eastwind's shareholders may be liable for additional amounts in excess of the escrow amount. The contingent purchase consideration of $1.0 million was paid to the seller in April 2020.
In connection with the Eastwind acquisition, certain former employees of Eastwind received cash retention payments totaling $0.3 million on the Eastwind Closing Date. Because these employees were not required to provide future services to the Company, the cash retention payments were accounted for as part of the purchase price. These former Eastwind employees will also receive cash retention payments subject to such employee's continued employment with the Company through the next regularly scheduled payroll dates following each of the first and second anniversaries of the Eastwind Closing Date. The cash retention payment liability related to these future cash retention payments were accounted for separately from the business combination as the cash retention payment is automatically forfeited upon termination of employment. The Company recorded the liability over the period it was earned as compensation expense for post-combination services.
The fair value of intangible asset was based on a valuation using a cost method approach. The underlying assumptions include estimates of cost to replace or reproduce the asset, less adjustments for physical deterioration and functional
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Table of Contents
NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)


obsolescence, if relevant. This fair value measurement was based on significant inputs not observable in the market and thus represents Level 3 fair value measurements.
The following table reflects the fair value of the acquired identifiable intangible asset and related estimated useful life (in thousands):

Fair ValueUseful Life (Years)
Developed technology$4,230 10

The average useful life of the developed technology acquired from Eastwind is 10 years.

HNT Tools Business Divestiture
On September 14, 2018 (the HNT Divestiture Date), the Company divested its HNThandheld network test (HNT) tools business for cash proceeds of $1.3 million and potential future earnout payments of up to $4.0 million over two years that arewere contingent on the HNT tools business achieving certain milestones. The fair value of the contingent consideration in the amount of $2.3 million was recognized on the HNT Divestiture Date and was measured using unobservable (Level 3) inputs. The contingent consideration iswas presented as a non-cash investing activity on the consolidated statement of cash flows. The Company transferred $4.6 million of consideration along with net liabilities of the HNT tools business related to a working capital adjustment during the fiscal year ended March 31, 2019. The Company recorded a loss on the divestiture for the year ended March 31, 2019 totaling $9.5 million, which included $1.3 million of transaction costs and $0.5 million of incentive compensation payable to the HNT tools business employees negotiated as part of the sale. In connection with the divestiture, the Company hashad entered into a transitional services agreement with the buyer to provide certain services for a period of up to eighteen months. Income associated with the transitional services agreement for the fiscal yearyears ended March 31, 20192021 and 2020 was $2.2$0.2 million and $1.2 million, respectively, and is included within other expense, net in the Company's consolidated statement of operations.
The Company recorded a $1.6 million change in the fair value of the contingent consideration, which is included in other expense, net within the Company’s consolidated statements of operations for the year ended March 31, 2019. The $0.8 million of contingent consideration is included in other assets within the Company’s consolidated balance sheet at March 31, 2019 
The Company determined that the sale of the HNT tools business did not represent a strategic shift and will not have a major effect on its consolidated results of operations, financial position or cash flows. Accordingly, the Company has not presented the sale as a discontinued operation in the consolidated financial statements.
Efflux
On July 12, 2017 (the Efflux Closing Date), the Company completed the acquisition of Efflux for $8.6 million. Efflux's technology detects, analyzes and correlates threat activity within enterprise networks. The Efflux technology and engineering talent have been integrated into our security products in order to support the ongoing enhancement of that products portfolio.
Goodwill was recognized for the excess purchase price over the fair value of the net assets acquired. Goodwill of $6.1 million from the acquisition was included within the Security reporting unit. Goodwill and intangible assets recorded as part of the acquisition are not deductible for tax purposes.
NOTE 9 – GOODWILL & INTANGIBLE ASSETS
Goodwill
The Company has two1 reporting units: (1) Service Assurance and (2) Security. At March 31, 2019, goodwill attributable to the Company's Service Assurance and Security reporting units was $1.2 billion and $555.1 million, respectively. At March 31, 2018, goodwill attributable to the Company's Service Assurance and Security reporting units was $1.2 billion and $555.9 million, respectively.unit. Goodwill is tested for impairment at a reporting unit level at least annually, as of January 31, or on an interim basis if an event occurs or circumstances change that would, more likely than not, reduce the fair value of the reporting unit below its carrying value. The Company completed its annual impairment test on JanuaryAt March 31, 2019.2021 and 2020, the carrying amount of goodwill was $1.7 billion.
InDuring fiscal years 20192021 and 2018,2020, the Company's quantitativeannual impairment tests indicated that goodwill was not impaired. TheIn the fourth quarter of fiscal year 2021, the Company determinedcompleted its annual goodwill impairment test at January 31, 2021, using the fair values of its reporting units by preparing a discounted cash flow analysis using forward looking projections ofqualitative Step 0 assessment as the reporting units’ future operating results and by comparingCompany concluded that it was more likely than not that the fair value of the reporting units to the implied marketunit exceeded its carrying value of selected peers. The significant assumptions used in the discounted cash flow analysis include: revenue and revenue growth, selling margins, other operating expenditures, the discounted rate used to present value future cash flows and terminal growth rates. The discount rate used is a cost of equity method, which is essentially equal to the "market participant" weighted-average cost of capital (WACC). The Service Assurance and Security reporting units' goodwill fair value substantially exceeded their respective carrying value.
The change in the carrying amount of goodwill for the fiscal year ended March 31, 20192021 is due to the divestiture of the HNT tools business and impact of foreign currency translation adjustments related to asset balances that are recorded in currencies other than the U.S. Dollar.

F-24


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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)





The changes in the carrying amount of goodwill for the fiscal years ended March 31, 20192021 and 20182020 are as follows (in thousands):
  
Balance at March 31, 2017$1,718,162
    Goodwill attributable to the Efflux acquisition6,077
    Foreign currency translation impact(11,475)
Balance as of March 31, 2018$1,712,764
    Divestiture of the HNT tools business(4,414)
    Foreign currency translation impact7,135
Balance as of March 31, 2019$1,715,485
Balance at March 31, 2019$1,715,485 
    Goodwill attributed to the Eastwind acquisition1,003 
    Goodwill attributed to the Gigavation acquisition3,816 
    Foreign currency translation impact5,376 
Balance at March 31, 2020$1,725,680 
Foreign currency translation impact(8,126)
Balance at March 31, 2021$1,717,554 
Intangible Assets
The net carrying amounts of intangible assets were $669.1$511.9 million and $831.4$582.2 million at March 31, 20192021 and 2018,2020, respectively. Intangible assets acquired in a business combination are recorded under the acquisition method of accounting at their estimated fair values at the date of acquisition. The Company amortizes intangible assets over their estimated useful lives, except for the acquired trade name which resulted from the Network General acquisition, which has an indefinite life and thus is not amortized. The carrying value of the indefinite lived trade name is evaluated for potential impairment annually or more frequently if events or changes in circumstances indicate that the asset might be impaired.
During fiscal year 2019, the Company performed a quantitative analysis on certain intangible assets related to the HNT tools business, which has since been divested. The fair value for the intangible assets related to the HNT tools business was calculated considering a range of potential transaction prices which the Company considers to be a Level 3 measurement. The fair value of these intangible assets was determined to be less than the carrying value, and as a result, the Company recognized an impairment charge of $35.9 million in the twelve months ended March 31, 2019. The impairment charge was recorded within a separate operating expense line item in the Company's consolidated statements of operations during the twelve months ended March 31, 2019.
In September 2018, the Company completed the divestiture of the HNT tools business. As a result, the net carrying value of the Company's intangible assets was reduced by $10.2 million.
InDuring fiscal year 20192021 and 2018,2020, the Company's annual impairment tests indicated that the acquired trade name was not impaired. In the fourth quarter of fiscal year 2019,2021, the Company completed its annual impairment test of the indefinite lived intangible at January 31, 2019,2021 using the qualitative Step 0 assessment. No impairment indicators were observed at Januaryassessment as the Company concluded that it was more likely than not that the fair value of the indefinite-lived asset exceeded its carrying value.
During the fiscal year ended March 31, 2019.
2021, the Company acquired $4.5 million of technology licenses. These amounts are included within distributor relationships and are being amortizing using the economic benefit method over useful lives of between three and four years. The Company did not0t acquire any technology licenses during the fiscal year ended March 31, 2019. During the fiscal year ended March 31, 2018, the Company acquired technology licenses for $0.5 million. This amount is included within distributor relationships and is being amortized using the economic benefit method over a useful life of 3 years.

Table of Contents

NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)



2020.
Intangible assets include the indefinite lived trade name with a carrying value of $18.6 million and the following amortizable intangible assets at March 31, 20192021 (in thousands):
CostAccumulated
Amortization
Net
Developed technology$252,071 $(212,688)$39,383 
Customer relationships775,898 (333,903)441,995 
Distributor relationships and technology licenses11,469 (7,829)3,640 
Definite-lived trademark and trade name39,434 (31,467)7,967 
Core technology7,192 (7,192)
Net beneficial leases336 (336)
Non-compete agreements292 (292)
Capitalized software3,317 (3,281)36 
Other1,208 (963)245 
$1,091,217 $(597,951)$493,266 
F-25

 Cost 
Accumulated
Amortization
 Net
Developed technology$242,259
 $(168,289) $73,970
Customer relationships772,969
 (218,043) 554,926
Distributor relationships and technology licenses6,882
 (5,237) 1,645
Definite-lived trademark and trade name39,304
 (20,586) 18,718
Core technology7,192
 (6,845) 347
Net beneficial leases336
 (336) 
Non-compete agreements292
 (292) 
Leasehold interest500
 (500) 
Backlog16,397
 (16,397) 
Capitalized software3,317
 (2,690) 627
Other1,208
 (923) 285
 $1,090,656
 $(440,138) $650,518

Table of Contents

NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)


Intangible assets include the indefinite lived trade name with a carrying value of $18.6 million and the following amortizable intangible assets at March 31, 20182020 (in thousands):
CostAccumulated
Amortization
Net
Developed technology$249,675 $(191,876)$57,799 
Customer relationships767,366 (275,361)492,005 
Distributor relationships and technology licenses6,785 (6,321)464 
Definite-lived trademark and trade name39,059 (26,246)12,813 
Core technology7,192 (7,074)118 
Net beneficial leases336 (336)
Non-compete agreements292 (292)
Leasehold interest500 (500)
Backlog16,223 (16,223)
Capitalized software3,317 (3,202)115 
Other1,208 (943)265 
$1,091,953 $(528,374)$563,579 
 Cost 
Accumulated
Amortization
 Net
Developed technology$259,758
 $(148,937) $110,821
Customer relationships845,490
 (176,425) 669,065
Distributor relationships and technology licenses9,019
 (5,389) 3,630
Definite-lived trademark and trade name44,387
 (18,138) 26,249
Core technology7,345
 (6,712) 633
Net beneficial leases336
 (336) 
Non-compete agreements317
 (317) 
Leasehold interest2,600
 (2,130) 470
Backlog18,544
 (18,544) 
Capitalized software3,183
 (1,621) 1,562
Other1,247
 (903) 344
 $1,192,226
 $(379,452) $812,774

Table of Contents

NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)



Amortization included as product revenue consists of amortization of backlog. Amortization included as cost of product revenue consists of amortization of developed technology, distributor relationships and technology licenses, core technology and software. Amortization included as operating expense consists of all other intangible assets. The following table provides a summary of amortization expense during the fiscal years ended March 31, 2019, 2018,2021, 2020, and 20172019 (in thousands).
Years Ended March 31,Years Ended March 31,
2019 2018 2017202120202019
Amortization of intangible assets included as:     Amortization of intangible assets included as:
Product revenue$
 $9
 $11,438
Cost of product revenue34,039
 40,286
 44,326
Cost of product revenue20,457 26,664 34,039 
Operating expense74,325
 76,661
 70,325
Operating expense61,151 64,525 74,325 
$108,364
 $116,956
 $126,089
$81,608 $91,189 $108,364 
The following is the expected future amortization expense at March 31, 20192021 for the fiscal years ended March 31 (in thousands):
2022$71,540 
202363,799 
202455,547 
202548,476 
202644,386 
Thereafter209,518 
Total$493,266 
 
2020$90,924
202179,643
202269,232
202361,511
202453,403
Thereafter295,805
Total$650,518
  
The weighted average amortization period of developed technology and core technologytechnology is 11.3 years.11.2 years. The weighted average amortization period for customer and distributor relationships is 15.9 years. The weighted average amortization period for trademarks and trade names is 8.6 years. The weighted average amortization period for capitalized software is 3.0 years. The weighted average amortization period for all amortizing intangible assets is 14.6 years.


NOTE 10 – DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES
NetScout operates internationally and, in the normal course of business, is exposed to fluctuations in foreign currency exchange rates. The exposures result from costs that are denominated in currencies other than the U.S. Dollar, primarily the Euro, British Pound, Canadian Dollar, and Indian Rupee. The Company manages its foreign cash flow risk by hedging forecasted cash flows for operating expenses denominated in foreign currencies for up to twelve months, within specified guidelines through the use of forward contracts. The Company enters into foreign currency exchange contracts to hedge cash
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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)


flow exposures from costs that are denominated in currencies other than the U.S. Dollar. These hedges are designated as cash flow hedges at inception.
NetScout also periodically enters into forward contracts to manage exchange rate risk associated with certain third-party transactions and for which the Company does not elect hedge accounting treatment as there is no difference in the timing of gain or loss recognition on the hedge instrument and the hedged item.
All of the Company’sCompany's derivative instruments are utilized for risk management purposes, and the Company does not use derivatives for speculative trading purposes. These contracts will mature over the next twelve months and are expected to impact earnings on or before maturity.

Table of Contents

NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)



The notional amounts and fair values of derivative instruments in the consolidated balance sheets at March 31, 20192021 and 20182020 were as follows (in thousands):
 
Notional Amounts (a) Prepaid Expenses and Other Current Assets Accrued Other Notional Amounts (a)Prepaid Expenses and Other Current AssetsAccrued Other
March 31, 2019 March 31, 2018 March 31, 2019 March 31, 2018 March 31, 2019 March 31, 2018 March 31, 2021March 31, 2020March 31, 2021March 31, 2020March 31, 2021March 31, 2020
Derivatives Designated as Hedging Instruments:           Derivatives Designated as Hedging Instruments:
Forward contracts$4,550
 $11,225
 $58
 $122
 $68
 $40
Forward contracts$11,037 $1,722 $57 $$152 $49 
Derivatives Not Designated as Hedging Instruments:Derivatives Not Designated as Hedging Instruments:
Forward contractsForward contracts6,373 39 
$57 $$191 $49 
 Notional amounts represent the gross contract/notional amount of the derivatives outstanding.
(a)Notional amounts represent the gross contract/notional amount of the derivatives outstanding.
The following table provides the effect foreign exchange forward contracts had on other comprehensive income (loss), (OCI) and results of operations atduring the fiscal years ended March 31, 20192021 and 20182020 (in thousands):
Derivatives in Cash Flow
Hedging Relationships
Effective Portion Ineffective Portion
Gain (Loss) Recognized
in OCI on Derivative
(a)
 
Gain (Loss) Reclassified from
Accumulated OCI into Income
(b)
 
Gain (Loss) Recognized in Income (Amount
Excluded from Effectiveness Testing)
(c)
March 31, March 31,   March 31, March 31,   March 31, March 31,
 2019 2018 Location 2019 2018 Location 2019 2018
Forward contracts$(696) $1,079
 
Research and
development
 $164
 $(121) 
Research and
development
 $69
 $60
     
Sales and
marketing
 411
 (779) 
Sales and
marketing
 (196) (153)
 $(696) $1,079
   $575
 $(900)   $(127) $(93)
Gain (Loss) Recognized
in OCI on Derivative
(a)
Gain (Loss) Reclassified from
Accumulated OCI into Income
(b)
March 31,March 31, March 31,March 31,
 20212020Location20212020
Forward contracts$274 $(103)Research and development$(57)$(19)
Sales and marketing(252)47 
$274 $(103)$(309)$28 
 
(a)The amount represents the change in fair value of derivative contracts due to changes in spot rates.
(b)The amount represents reclassification from other comprehensive income to earnings that occurs when the hedged item affects earnings.
(c)The amount represents the change in fair value of derivative contracts due to changes in the difference between the spot price and forward price that is excluded from the assessment of hedge effectiveness and therefore recognized in earnings. No gains or losses were reclassified as a result of discontinuance of cash flow hedges.
(a)The amount represents the change in fair value of derivative contracts due to changes in spot rates.

(b)The amount represents reclassification from other comprehensive income to earnings that occurs when the hedged item affects earnings.
The following table provides the effect foreign exchange forward contracts not designated as hedging instruments had on the Company's results of operations during the fiscal years ended March 31, 2021 and 2020 (in thousands):
Gain Recognized in Income
(a)
March 31,March 31,
Location20212020
Forward contractsGeneral and administrative$115 $
$115 $

(a) The amount represents the change in fair value of derivative contracts due to changes in spot rates.
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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)



NOTE 11 RESTRUCTURING CHARGES
During the fiscal year ended March 31, 2016, the Company recorded a restructuring charge of $500 thousand related to one-time termination benefits to be paid to one employee, which was the completion of a plan that was required as a closing condition related to the acquisition of Danaher Corporation's (Danaher) Communications Business in July 2015 (Comms Transaction).    
During the fiscal year ended March 31, 2017, the Company approved two restructuring plans. During the first quarter of fiscal year 2017, the Company restructured certain departments to better align functions subsequent to the Comms Transaction. As a result of the restructuring program, the Company recorded $2.0 million of restructuring charges related to one-time termination benefits to be paid to nineteen employees which was recorded during the fiscal year ended March 31, 2017. The one-time termination benefits related to this plan were paid in full during the fiscal year ended March 31, 2017. In addition, during the fourth quarter of fiscal year 2017, the Company restructured certain departments to better align functions subsequent to the Comms Transaction, resulting in the termination of forty-one employees. Communication of the plan to the impacted employees was substantially completed on March 31, 2017. As a result of the workforce reduction, during the fiscal year ended March 31, 2017, the Company recorded a restructuring change totaling $1.9 million related to one-time termination benefits and $0.4 million in facility related charges. All of the workforce reduction was completed during the quarter ended September 30, 2017. During the fiscal year ended March 31, 2018, the Company recorded an additional charge for one-time termination

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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)



benefits and facility-related costs of $0.9 million. The one-time termination benefits and facilities-related costs related to this plan were paid in full during the fiscal year ended March 31, 2018.
During the fiscal year ended March 31, 2018, the Company restructured certain departments to better align functions resulting in the termination of sixty-one employees.functions. As a result of the workforce reduction, during the fiscal year ended March 31, 2018, the Company recorded a restructuring charge totaling $5.1 million related to one-time termination benefits for the employees that were notified during the period. Additional one-time termination benefit charges and facility-related costs of approximately $1.7 million were recorded during the fiscal year ended March 31, 2019. The one-time termination benefits and facility-related costs related to this plan were paid in full during the fiscal year ended March 31, 2019.
During the fiscal year ended March 31, 2019, the Company implemented a voluntary separation program (VSP) for employees who met certain requirements to reduce overall headcount. As a result of the related workforce reduction, the Company recorded restructuring charges totaling $17.2 million related to one-time termination benefits for one hundred fifty-five employees who voluntarily terminated their employment with the Company during the period. Additional one-time termination benefit charges of approximately $0.1 million for one employee are anticipated to bewere recorded in the next three months.fiscal year ended March 31, 2020. The one-time termination benefits are expected to bewere paid in full byduring the endfiscal year ended March 31, 2020.
During the fiscal year ended March 31, 2020, the Company approved 2 restructuring plans. During the second quarter of the fiscal year ended March 31, 2020, the Company restructured certain departments to better align functions. As a result of the workforce reduction, the Company recorded a restructuring charge totaling $0.5 million during the fiscal year ended March 31, 2020. The one-time termination benefits were paid in full during the first quarter of the fiscal year ending March 31, 2020.2021. During the fourth quarter of the fiscal year ended March 31, 2020, the Company restructured certain departments to better align functions. As a result of the workforce reduction, the Company recorded a restructuring charge totaling $2.1 million during the fiscal year ended March 31, 2020 and an additional $0.1 million during the fiscal year ended March 31, 2021. The one-time termination benefits were paid in full by the end of the second quarter of the fiscal year ending March 31, 2021.
The following table provides a summary of the activity related to the restructuring plans and the related restructuring liability (in thousands):
FY2018 PlanVSPQ2 FY20 PlanQ4 FY20 Plan
Employee-RelatedFacilities RelatedEmployee-RelatedEmployee-RelatedEmployee-RelatedTotal
Balance at March 31, 2018$3,696 $$$$$3,696 
     Restructuring charges to operations1,017 643 17,248 18,908 
     Cash payments(4,240)(458)(17,329)(22,027)
     Other adjustments(473)(185)81 (577)
Balance at March 31, 2019$$$$$$
     Restructuring charges to operations123 465 2,069 2,657 
     Cash payments(123)(434)(339)(896)
     Other adjustments(28)(13)(41)
Balance at March 31, 2020$$$$$1,717 $1,720 
     Restructuring charges to operations62 62 
     Cash payments(3)(1,860)(1,863)
     Other adjustments81 81 
Balance at March 31, 2021$$$$$$

F-28
 FY2016 Plan Q1 FY2017 Plan Q4 FY2017 Plan FY2018 Plan VSP  
Employee-Related Employee-Related Employee-Related Facilities Related Employee-Related Facilities Related Employee-Related Total
Balance at March 31, 2016$272
 $
 $
 $
 $
 $
 $
 $272
     Restructuring charges to operations
 2,034
 1,867
 405
 
 
 
 4,306
     Cash payments(272) (1,739) (317) 
 
 
 
 (2,328)
     Other adjustments
 (295) 
 
 
 
 
 (295)
Balance at March 31, 2017$
 $
 $1,550
 $405
 $
 $
 $
 $1,955
     Restructuring charges to operations
 
 729
 208
 5,085
 
 
 6,022
     Cash payments
 
 (1,867) (374) (1,331) 
 
 (3,572)
     Other adjustments
 
 (412) (239) (58) 
 
 (709)
Balance at March 31, 2018$
 $
 $
 $
 $3,696
 $
 $
 $3,696
     Restructuring charges to operations
 
 
 
 1,017
 643
 17,248
 18,908
     Cash payments
 
 
 
 (4,240) (458) (17,329) (22,027)
     Other adjustments
 
 
 
 (473) (185) 81
 (577)
Balance at March 31, 2019$
 $
 $
 $
 $
 $
 $
 $



Table of Contents

NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)


NOTE 12 – LONG-TERM DEBT
On January 16, 2018, the Company amended and expanded its existing credit agreement (Amended Credit Agreement) with a syndicate of lenders by and among: the Company; JPMorgan Chase Bank, N.A. (JPMorgan), as administrative agent and collateral agent; J.P. Morgan Securities LLC, KeyBanc Capital Markets, Merrill Lynch, Pierce, Fenner & Smith Incorporated, RBC Capital Markets and Wells Fargo Securities, LLC, as joint lead arrangers and joint bookrunners; Fifth Third Bank, Santander Bank, N.A., SunTrust Bank, N.A. and U.S. Bank National Association, as co-documentation agents; and the lenders party thereto.

Table of Contents

NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)



The Amended Credit Agreement provides for a five-year, $1.0 billion senior secured revolving credit facility, including a letter of credit sub-facility of up to $75.0 million. The Company may elect to use the new credit facility for general corporate purposes or to finance the repurchase of up to twenty-fiveNaN million shares of the Company's common stock under the Company's common stock repurchase plan. The commitments under the Amended Credit Agreement will expire on January 16, 2023, and any outstanding loans will be due on that date. During the fiscal year ended March 31, 2019,2021, the Company repaid $50.0$100.0 million of borrowings under the Amended Credit Agreement. At March 31, 2019, $5502021, $350 million was outstanding under the Amended Credit Agreement.
At the Company's election, revolving loans under the Amended Credit Agreement bear interest at either (a) an Alternate Base Rate per annum equal to the greatest of (1) JPMorgan's prime rate, (2) 0.50% in excess of the New York Federal Reserve Bank (NYFRB) rate, or (3) an adjusted one month LIBOR rate plus 1%; or (b) such adjusted LIBOR rate (for the interest period selected by the Company), in each case plus an applicable margin. For the period from the delivery of the Company's financial statements for the quarter ended December 31, 2018,2020, until the Company has delivered financial statements for the quarter ended March 31, 2019,2021, the applicable margin will be 1.75%1.50% per annum for LIBOR loans and 0.75%0.50% per annum for Alternate Base Rate loans, and thereafter the applicable margin will vary depending on the Company's leverage ratio, ranging from 1.00%0.75% per annum for Base Rate loans and 2.00%1.75% per annum for LIBOR loans if the Company's consolidated leverage ratio is greaterless than or equal to 3.50 to 1.00, down to 0.00% per annum for Alternate Base Rate loans and 1.00% per annum for LIBOR loans if the Company's consolidated leverage ratio is equal to or less than 1.50 to 1.00. As of March 31, 2021, the Company’s maximum allowed consolidated leverage ratio is 3.50 to 1.00.
On July 27, 2017, the U.K. Financial Conduct Authority (FCA) announced that it will no longer require banks to submit rates for the calculation of LIBOR after 2021. On March 5, 2021, the Intercontinental Exchange Benchmark Administration (IBA), the FCA-regulated and authorized administrator of LIBOR, announced, and the FCA confirmed, that one week and two-month USD LIBOR settings will cease on December 31, 2021, and that the USD LIBOR panel will cease on June 30, 2023. IBA notes that any publication of the Overnight and 1, 3, 6 and 12 Months USD LIBOR settings based on panel bank submissions beyond December 31, 2021 will need to comply with applicable regulations, including as to representativeness. Based on current information from panel banks, IBA anticipates there being a representative panel for the continuation of these USD LIBOR settings through to June 30, 2023.
The Company's Amended Credit Agreement, which matures on January 16, 2023 prior to the June 30, 2023 cessation of USD LIBOR publications, provides for the Administrative Agent to determine if (i) adequate and reasonable means do not exist for ascertaining the LIBOR rate or (ii) the FCA or Government Authority having jurisdiction over the Administrative Agent has made a public statement identifying a specific date after which the LIBOR rate shall no longer be used for determining interest rates for loans and the Administrative Agent determines that (i) and (ii) above are unlikely to be temporary, then the Administrative Agent and the Company would agree to transition to an Alternate Base Rate Borrowingborrowing as described above or amend the Credit Agreement to establish an alternate rate of interest to LIBOR that gives due consideration to the then prevailing market convention for determining a rate of interest for syndicated loans in the United States at such time.
The Company's consolidated leverage ratio is the ratio of its total funded debt compared to its consolidated adjusted EBITDA. Consolidated adjusted EBITDA includes certain adjustments, including, without limitation, adjustments relating to extraordinary, unusual or non-recurring charges, certain restructuring charges, non-cash charges, certain transaction costs and expenses and certain pro forma adjustments in connection with material acquisitions and dispositions, all as set forth in detail in the definition of consolidated adjusted EBITDA in the Amended Credit Agreement.
Commitment fees will accrue on the daily unused amount of the credit facility. For the period from the delivery of the Company's financial statements for the quarter ended December 31, 20182020 until the Company has delivered financial statements for the quarter ended March 31, 2019,2021, the commitment fee will be 0.30%0.25% per annum, and thereafter the commitment fee will vary depending on the Company's consolidated leverage ratio, ranging from 0.30% per annum if the Company's consolidated leverage ratio is greater than 2.75 to 1.00, down to 0.15% per annum if the Company's consolidated leverage ratio is equal to or less than 1.50 to 1.00.
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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)


Letter of credit participation fees are payable to each lender on the amount of such lender’s letter of credit exposure, during the period from the closing date of the Amended Credit Agreement to but excluding the date which is the later of (i) the date on which such lender’s commitment terminates or (ii) the date on which such lender ceases to have any letter of credit exposure, at a rate per annum equal to the applicable margin for LIBOR loans. Additionally, the Company will pay a fronting fee to each issuing bank in amounts to be agreed to between the Company and the applicable issuing bank.
Interest on Alternate Base Rate loans is payable at the end of each calendar quarter. Interest on LIBOR loans is payable at the end of each interest rate period or at the end of each three-month interval within an interest rate period if the period is longer than three months. The Company may also prepay loans under the Amended Credit Agreement at any time, without penalty, subject to certain notice requirements.
Debt is recorded at the amount drawn on the revolving credit facility plus interest based on floating rates reflective of changes in the market which approximates fair value.
The loans and other obligations under the credit facility are (a) guaranteed by each of the Company's wholly owned material domestic restricted subsidiaries, subject to certain exceptions, and (b) are secured by substantially all of the assets of

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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)



the Company and the subsidiary guarantors, including a pledge of all the capital stock of material subsidiaries held directly by the Company and the subsidiary guarantors (which pledge, in the case of any foreign subsidiary, is limited to 65% of the voting stock), subject to certain customary exceptions and limitations. The Amended Credit Agreement generally prohibits any other liens on the assets of the Company and its restricted subsidiaries, subject to certain exceptions as described in the Amended Credit Agreement.
The Amended Credit Agreement contains certain covenants applicable to the Company and its restricted subsidiaries, including, without limitation, limitations on additional indebtedness, liens, various fundamental changes, dividends and distributions, investments (including acquisitions), transactions with affiliates, asset sales, including sale-leaseback transactions, speculative hedge agreements, payment of junior financing, changes in business and other limitations customary in senior secured credit facilities. In addition, the Company is required to maintain certain consolidated leverage and interest coverage ratios. These covenants and limitations are more fully described in the Amended Credit Agreement. At March 31, 2019,2021, the Company was in compliance with all of these covenants.
The Amended Credit Agreement provides that events of default will exist in certain circumstances, including failure to make payment of principal or interest on the loans when required, failure to perform certain obligations under the Amended Credit Agreement and related documents, defaults under certain other indebtedness, certain insolvency events, certain events arising under ERISA, a change of control and certain other events. Upon an event of default, the administrative agent with the consent of, or at the request of, the holders of more than 50% in principal amount of the loans and commitments may terminate the commitments and accelerate the maturity of the loans and enforce certain other remedies under the Amended Credit Agreement and the other loan documents.
In connection with the Company's Amended Credit Agreement described above, the Company terminated its previous term loan dated as of July 14, 2015, by and among the Company; JPMorgan Chase Bank, N.A. (JPMorgan), as administrative agent and collateral agent; J.P. Morgan Securities LLC, KeyBanc Capital Markets, Merrill Lynch, Pierce, Fenner & Smith Incorporated, RBC Capital Markets and Wells Fargo Securities, LLC, as joint lead arrangers and joint bookrunners; Santander Bank, N.A., SunTrust Bank, N.A. and U.S. Bank National Association, as co-documentation agents; and the lenders party thereto.
The Company has capitalized debt issuance costs totaling $12.2 million at March 31, 2019,2021, which are being amortized over the life of the revolving credit facility. The unamortized balance was $6.6$3.1 million as of March 31, 2019.2021. The balance of $1.7 million was included as prepaid expenses and other current assets and a balance of $4.9$1.4 million was included as other assets in the Company's consolidated balance sheet.
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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)


NOTE 13 – NET INCOME (LOSS) PER SHARE
Calculations of the basic and diluted net income (loss) per share and potential common shares are as follows (in thousands, except for per share data):
Year Ended March 31, Fiscal Year Ended March 31,
2019 2018 2017 202120202019
Numerator:     Numerator:
Net income (loss)$(73,324) $79,812
 $33,291
Net income (loss)$19,352 $(2,754)$(73,324)
Denominator:     Denominator:
Denominator for basic net income (loss) per share - weighted average common shares outstanding78,617
 87,425
 92,226
Denominator for basic net income (loss) per share - weighted average common shares outstanding73,103 75,162 78,617 
Dilutive common equivalent shares:     Dilutive common equivalent shares:
Weighted average restricted stock units
 836
 694
Weighted average restricted stock units719 
Denominator for diluted net income (loss) per share - weighted average shares outstanding78,617
 88,261
 92,920
Denominator for diluted net income (loss) per share - weighted average shares outstanding73,822 75,162 78,617 
Net income (loss) per share:     Net income (loss) per share:
Basic net income (loss) per share$(0.93) $0.91
 $0.36
Basic net income (loss) per share$0.26 $(0.04)$(0.93)
Diluted net income (loss) per share$(0.93) $0.90
 $0.36
Diluted net income (loss) per share$0.26 $(0.04)$(0.93)
 

Table of Contents

NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)



The following table sets forth restricted stock units excluded from the calculation of diluted net income per share, since their inclusion would be antidilutive (in thousands):
 Year Ended March 31,
  
2019 2018 2017
Restricted stock units706
 1,450
 1,320
 Fiscal Year Ended March 31,
  
202120202019
Restricted stock units2,864 675 706 
Basic net income (loss) per share is calculated by dividing net income (loss) by the weighted average number of shares outstanding during the period. Unvested restricted shares, although legally issued and outstanding, are not considered outstanding for purposes of calculating basic earnings per share. Diluted net income (loss) per share is calculated by dividing net income (loss) by the weighted average number of shares outstanding plus the dilutive effect, if any, of outstanding restricted shares and restricted stock units using the treasury stock method. The calculation of the dilutive effect of outstanding equity awards under the treasury stock method includes consideration of proceeds from the assumed exercise of unrecognized compensation expense. As the Company incurred a net loss in the fiscal yearyears ended March 31, 2020 and 2019, all outstanding restricted stock units have an anti-dilutive effect and are therefore excluded from the computation of diluted weighted average share outstanding.
For the fiscal year ended March 31, 2018, the delivery of 7.4 million shares under the Company's accelerated share repurchase (ASR) agreements reduced its outstanding shares used to determine its weighted average common shares outstanding for purposes of calculating basic and diluted earnings per share. See Note 14 for additional information. The Company evaluated the ASR agreements for potential dilutive effects of any shares remaining to be received or owed upon settlement and determined the additional shares to be received would be anti-dilutive, and therefore they were not included in the Company's calculation of diluted earnings per share for the fiscal year ended March 31, 2018.
NOTE 14 – TREASURY STOCK
On May 19, 2015, the Company’s Board of Directors approved a share repurchase program, conditional upon the completion of the Comms Transaction. This program enabled the Company to repurchase up to 20 million shares of its common stock. This plan became effective on July 14, 2015 upon the completion of the Comms Transaction and replaced the Company's previously existing open market stock repurchase program. The Company was not obligated to acquire any specific amount of common stock within any particular timeframe under this program. The Company repurchased 6,773,438 shares for $227.6 million, and 3,148,426 shares for $80.0 million in the open market under this stock repurchase plan during the fiscal years ended March 31, 2018, and 2017, respectively. At March 31, 2018, there were no shares of common stock that remained available to be purchased under this plan.
On October 24, 2017, the Company’s Board of Directors approved a new share repurchase program that enables the Company to repurchase up to twenty-five millionNaN shares of its common stock. This new program became effective once the Company’s previously disclosed twenty million20000000 share repurchase program was completed. The Company is not obligated to acquire any specific amount of common stock within any particular timeframe as a result of its newthis share repurchase program. 
On February 1, 2018, the Company entered into ASR agreements with two2 third-party financial institutions (the Dealers) to repurchase an aggregate of $300 million of the Company's common stock via accelerated stock repurchase transactions under the Company’s twenty million20000000 share repurchase program and the twenty-five millionNaN share repurchase program. The Company borrowed $300 million against its Amended Credit Facility in order to financeDuring the payment of the initial purchase price to each of the Dealers. Under the terms of the ASR,fiscal year ended March 31, 2018, the Company made a $150 million payment to each of the Dealers on February 2, 2018, and received an initial delivery of 3,693,931 shares from each of the Dealers, or 7,387,862 shares in the aggregate,for $210.0 million, of which is approximately 70 percent of the total number of shares of the Company's common stock expected to be repurchased under the ASR. As part of this purchase, 970,650 shares for $27.6 million were deducted underfrom the twenty million20000000 share repurchase program and 6,417,212 shares for $182.4 million were deducted from the twenty-five millionNaN share repurchase program duringprogram. During the fiscal year ended March 31, 2018. Final2019, final settlement of the ASR agreements was completed in August 2018. Asand as a result, the Company received an additional 3,679,947 shares of its common stock for $96.8 million, which reduced the number of shares available to be purchased from the twenty-five millionNaN share repurchase program during the fiscal year ended March 31, 2019. In total, 11,067,809 shares of the Company's common stock were repurchased under the ASR at an average cost per share of $27.11.

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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)





The Company repurchased an additional 154,271 shares for $3.3 million, 7,116,159 shares for $175.0 million, and 543,251 shares for $14.5 million under the twenty-five millionNaN share repurchase program during the fiscal yearyears ended March 31, 2019.2021, 2020 and 2019, respectively. At March 31, 2019, 14,359,5902021, 7,089,160 shares of common stock remained available to be purchased under the current repurchase program.
In connection with the vesting and release of the restriction on previously vested shares of restricted stock, the Company repurchased 451,683506,917 shares for $13.3 million, 519,241 shares for $11.9 million 408,097and 451,683 shares for $13.6 million and 320,572 shares for $9.6$11.9 million related to minimum statutory tax withholding requirements on these restricted stock units during the fiscal years ended March 31, 2019, 20182021, 2020 and 2017,2019, respectively. These repurchase transactions do not fall under the repurchase program described above, and therefore do not reduce the amount that is available for repurchase under those programs.

NOTE 15 – STOCK PLANS
2011 Employee Stock Purchase Plan
On September 7, 2011, the Company’sCompany's stockholders approved the 2011 Employee Stock Purchase Plan (the ESPP), under which 2,500,000 shares of the Company’sCompany's common stock have been reserved for issuance. On November 8, 2018, the Company increased the number of shares available under the ESPP by an additional 3,000,000 shares. The Company implemented the ESPP on March 1, 2012. Eligible employees may purchase shares of the Company’sCompany's common stock through regular payroll deductions of up to 20% of their eligible compensation. Under the terms of the offering under the ESPP, the number of shares of the Company’sCompany's common stock which a participant could purchase during any purchase period is limited to 2,000. In addition, the fair market value of shares purchased by an individual participant in the plan may not exceed $25,000 if the contribution period is within any calendar year. However, if contribution periods overlap calendar years, an individual participant is eligible to utilize the unused portion of the $25,000 limit from the subsequent purchase in the current purchase up to $50,000. Under the ESPP, shares of the company'sCompany's common stock may be purchased on the last day of each bi-annual offering period at 85% of the fair market value on the last day of such offering period. The offering periods run from March 1 through August 31 and from September 1 through the last day of February of each year. During the fiscal year ended March 31, 2019,2021, employees purchased 577,000561,669 shares under the ESPP with a weighted average purchase price per share of $26.13.$25.69. At March 31, 2019, 2,908,1432021, 1,751,813 shares were available for future issuance under the ESPP.
20072019 Equity Incentive Plan
Enacted inOn September 2007,12, 2019, the 2007Company's stockholders approved the 2019 Equity Incentive Plan (2007(2019 Plan), which replaced the Company's Amended 2007 Plan. The 2019 Plan permits the granting of incentive and nonstatutory stock options, stock appreciation rights, restricted stock andawards, restricted stock units,unit awards, and other stock awards, collectively referred to as “share-based"share-based awards." Periodically, the Company grants share-based awards to employees and officers of the Company and its subsidiaries. The Company accounts for these share-based awards in accordance with GAAP, which requires the measurement and recognition of compensation expense based on estimated fair values for all share-based payment awards made to its employees and directors. Share-based award grants are generally measured at fair value on the date of grant based on the number of shares granted and the quoted price of the Company’sCompany's common stock. Such value is recognized as a cost of revenue or an operating expense over the corresponding vesting period. OnAt September 7, 2011, the Company’s stockholders approved an amendment and restatement12, 2019, there was a total of the 2007 Equity Incentive Plan to increase the6,794,651 shares of common stock reserved for issuance by 8,000,000 shares. under the 2019 Plan, which consisted of 5,500,000 new shares plus 1,294,651 shares that remained available for grant under the Amended 2007 Plan as of September 12, 2019, the effective date of the 2019 Plan.
On September 22, 2015,10, 2020, the Company's stockholders approved an amendment and restatement ofto the 20072019 Equity Incentive Plan (the(2019 Amended 2007 Plan) to increase. The amendment increased the sharesnumber of common stockshares reserved for issuance by 8,500,000. A4,700,000 shares, established a one-year minimum vesting requirement for awards granted on or after September 10, 2020, and changed the factor used to calculate the increase or reduction in the number of shares available for issuance under the 2019 Amended Plan. At September 10, 2020, there was a total of 21,500,0007,667,262 shares are reserved for issuance under the 2019 Amended 2007Plan, which consisted of 4,700,000 new shares plus 2,967,262 shares that remained available for grant under the 2019 Plan as of September 10, 2020, the effective date of the 2019 Amended Plan. In addition, any shares not delivered to a participant because an award is exercised through a reduction
The aggregate number of shares subject to the award (cashless exercise) will not be available for issuance under the 2019 Amended 2007 Plan and any shares reacquiredwill increase by 1.00 share for each share of common stock returned to the Company2019 Amended Plan pursuant to cover withholding taxes upon exercise of a stock option or stock appreciation right or as considerationand increase for the exercise of a stock option or stock appreciation right will not become available for issuanceeach share: (i) subject to an award granted under the Amended 2007 Plan. SharesPlan or 2019 Amended Plan that are not issued because such award expires or otherwise terminates without all of the shares covered by such award having been issued; (ii) any shares subject to an award under the Amended 2007 Plan or 2019 Amended Plan that are not issued because such award is settled in cash; (iii) any shares issued pursuant to an award granted under the Amended 2007 Plan or 2019 Amended Plan that are
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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)


forfeited back to or repurchased by the Company because of failure to vest; and (iv) any shares that are reacquired or withheld by the Company to coversatisfy tax liabilities ofwithholding obligations in connection with common stock issued pursuant to restricted stock, unit grants will be restoredrestricted stock units, performance stock awards, or other stock awards granted under the Amended 2007 Plan and 2019 Amended Plan by 2.76 for awards that are returned to the available reserve2019 Amended Plan prior to September 10, 2020 and by 2.32 shares for awards that are returned to the 2019 Amended Plan on the 2 for 1 amount.or after September 10, 2020. Furthermore, the share reserve under the 2019 Amended 2007 Plan is reduced oneby 1 share for each share of common stock issued pursuant to a stock option or stock appreciation right, and two2.76 shares for each share of common stock issued pursuant to restricted stock, restricted stock units, performance stock awards, or other stock awards granted under the 2019 Amended 2007 Plan on or after March 31, 2011.September 12, 2019 but prior to September 10, 2020 and 2.32 shares for each share of common stock issued pursuant to restricted stock, restricted stock units, performance stock awards, or other stock awards after September 10, 2020. At March 31, 2019,2021, an aggregate of 4,210,6554,495,613 shares of unvested equity awards were outstanding under the 2019 Amended 2007 Plan.
The 2019 Amended 2007 Plan is administered by the Compensation Committee of the Board of Directors. The Compensation Committee operates under guidelines established by the Board of Directors. The Compensation Committee has the authority to

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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)



select the employees and consultants to whom awards are granted (except for directors and executive officers) and determine the terms of each award, including the number of shares of common stock subject to the award.
Share-based awards generally vest over four years. The exercise price of incentive stock options shall not be less than 100% of the fair market value of the common stock at the date of grant (110% for incentive stock options granted to holders of more than 10% of the voting stock of NetScout). The term of stock options granted cannot exceed tenseven years (five years for incentive stock options granted to holders of more than 10% of the voting stock of NetScout).
Based on historical experience, the Company assumed an annualized forfeiture rate of 0% for awards granted to its independent directors, approximately 2% for awards granted to its senior executives, and approximately 5% granted to all remaining employees during the fiscal years ended March 31, 2019, 20182021, 2020 and 2017.2019.
The following is a summary of share-based compensation expense including restricted stock units and employee stock purchases made under the Company's employee stock purchase plan (ESPP) based on estimated fair values within the applicable cost and expense lines identified below (in thousands):
 Fiscal Year Ended March 31,
 202120202019
Cost of product revenue$1,038 $1,069 $1,463 
Cost of service revenue5,823 5,774 5,959 
Research and development16,138 15,511 17,321 
Sales and marketing17,328 17,085 18,923 
General and administrative11,565 11,422 12,662 
$51,892 $50,861 $56,328 
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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)


 Year Ended March 31,
 2019 2018 2017
Cost of product revenue$1,463
 $1,159
 $934
Cost of service revenue5,959
 4,824
 3,956
Research and development17,321
 14,711
 12,362
Sales and marketing18,923
 15,213
 12,823
General and administrative12,662
 11,410
 9,114
 $56,328
 $47,317
 $39,189



Transactions under the Amended 2007, 2019 Plan and 2019 Amended Plan during the fiscal years ended March 31, 2019, 20182021, 2020 and 20172019 are summarized in the table below.
Restricted Stock Units
Restricted Stock Units Number of
Awards
Weighted
Average
Fair Value
Number of
Awards
 
Weighted
Average
Fair Value
Outstanding – March 31, 20162,873,306
 $35.32
Granted2,020,536
 24.92
Vested(950,159) 33.16
Canceled(333,382) 33.40
Outstanding – March 31, 20173,610,301
 $30.24
Granted1,962,590
 34.01
Vested(1,216,585) 31.09
Canceled(277,526) 31.70
Outstanding – March 31, 20184,078,780
 $31.77
Outstanding – March 31, 20184,078,780 $31.77 
Granted2,178,339
 30.10
Granted2,178,339 30.10 
Vested(1,438,219) 32.49
Vested(1,438,219)32.49 
Canceled(608,245) 30.52
Canceled(608,245)30.52 
Outstanding – March 31, 20194,210,655
 $30.84
Outstanding – March 31, 20194,210,655 $30.84 
GrantedGranted2,062,110 26.32 
VestedVested(1,651,284)31.03 
CanceledCanceled(347,008)29.74 
Outstanding – March 31, 2020Outstanding – March 31, 20204,274,473 $28.68 
GrantedGranted2,038,681 27.42 
VestedVested(1,630,228)28.63 
CanceledCanceled(187,313)28.28 
Outstanding – March 31, 2021Outstanding – March 31, 20214,495,613 $28.14 


At March 31, 2019,2021, there were 3,811,5057,868,290 shares of common stock available for grant under the 2019 Amended 2007 Plan.
The Company does not currently expect to repurchase shares from any source to satisfy its obligations under the 2019 Amended 2007 Plan.

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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)



The aggregate intrinsic value of stock options exercised and the fair value of restricted stock units vested at March 31, 2019, 20182021, 2020 and 20172019 were as follows (in thousands):
 Year Ended March 31,
  
2019 2018 2017
Total fair value of restricted stock unit awards vested$38,070
 $40,539
 $28,293
 Fiscal Year Ended March 31,
  
202120202019
Total fair value of restricted stock unit awards vested$42,510 $37,783 $38,070 
At March 31, 2019,2021, the total unrecognized compensation cost related to restricted stock unit awards was $98.1$94.8 million, which is expected to be amortized over a weighted-average period of 1.3 years.

NOTE 16 – PENSION BENEFIT PLANS
401(k) Plan
The Company has a defined contribution program for certain employees that is qualified under Section 401(k) of the Internal Revenue Code of 1986, as amended. The Company matches 50% of the employee’semployee's contribution up to 6% of the employee’s salary. NetScout contributions vest at a rate of 25% per year of service. NetScout made matching contributions of $6.6$6.7 million, $8.0$6.7 million and $9.4$6.6 million to the plan for the fiscal years ended March 31, 2019, 20182021, 2020 and 2017,2019, respectively.
Defined Benefit Pension Plan
Certain of the Company's non-U.S. employees participate in certain noncontributory defined benefit pension plans acquired in the Comms Transaction on July 14, 2015. Noneplans. NaN of the Company's employees in the U.S. participate in any noncontributory defined benefit pension plans. In general, these plans are funded based on considerations relating to legal requirements, underlying asset returns, the plan’splan's funded status, the anticipated deductibility of the contribution, local practices, market conditions, interest rates and other factors.
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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)


The components of the change in benefit obligation of the pension plan is as follows (in thousands):
March 31, March 31, March 31,March 31,
2019 2018 20212020
Benefit obligation, at beginning of year$33,464
 $30,141
Benefit obligation, at beginning of year$32,805 $34,895 
Service cost304
 407
Service cost333 341 
Interest cost704
 718
Interest cost667 603 
Benefits paid and other(302) (288)Benefits paid and other(400)(359)
Actuarial loss (gain)3,254
 (1,788)Actuarial loss (gain)2,205 (1,644)
Foreign exchange rate impact(2,529) 4,274
Foreign exchange rate impact1,976 (1,031)
Benefit obligation, at end of year$34,895
 $33,464
Benefit obligation, at end of year$37,586 $32,805 

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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)



The reconciliation of the beginning and ending balances of the fair value of the assets of the pension plan is as follows (in thousands):
March 31, March 31, March 31,March 31,
2019 2018 20212020
Fair value of plan assets, at beginning of year$
 $
Fair value of plan assets, at beginning of year$$
Employer direct benefit payments302
 288
Employer direct benefit payments400 359 
Benefits paid and other(302) (288)Benefits paid and other(400)(359)
Fair value of plan assets, at end of year$
 $
Fair value of plan assets, at end of year$$
The following sets forth the components of the Company's net periodic pension cost of the noncontributory defined benefit pension plans for the fiscal years ended March 31, 2019, 2018,2021, 2020, and 20172019 (in thousands):
Fiscal Year Ended March 31,
 202120202019
Service cost$333 $341 $304 
Interest cost667 603 704 
     Net periodic pension cost$1,000 $944 $1,008 
 Year Ended March 31,
 2019 2018 2017
Service cost$304
 $407
 $329
Interest cost704
 718
 638
     Net periodic pension cost$1,008
 $1,125
 $967


Weighted average assumptions used to determine net periodic pension cost at date of measurement:
March 31, March 31, March 31,March 31,March 31,March 31,
2019 2018 2017 202120202019
Discount rate1.80% 2.30% 2.10%Discount rate1.60 % 1.90 %1.80 %
Rate of compensation increase3.00% 2.25% 2.25%Rate of compensation increase3.00 % 3.00 %3.00 %
As of March 31, 2019,2021, unrecognized actuarial loss of $3.3$2.2 million ($2.31.5 million, net of tax) which have not yet been recognized in net periodic pension cost are included in accumulated other comprehensive income (loss). The unrecognized actuarial gains and losses are calculated as the difference between the actuarially determined projected benefit obligation and the value of the plan assets less accrued pension costs. NoneNaN of this amount is expected to be recognized in net periodic pension costs during the fiscal year ending March 31, 2020. No2021. NaN plan assets are expected to be returned to the Company during the fiscal year ending March 31, 2020.2021.
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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)


Expected Contributions
During the fiscal year ended March 31, 2019,2021, the Company contributed $302$400 thousand to its defined benefit pension plan. The following sets forth benefit payments, which reflect expected future service, as appropriate, expected to be paid by the plan in the periods indicated (in thousands):
2022$485 
2023$553 
2024$605 
2025$716 
2026$932 
2027 - 2031$5,656 
2020$382
2021$436
2022$484
2023$549
2024$599
2025 - 2030$4,561



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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)



NOTE 17 – INCOME TAXES
Income (loss) before income tax expense (benefit) consisted of the following (in thousands):
Year Ended March 31, Fiscal Year Ended March 31,
2019 2018 2017
202120202019
Domestic$(107,088) $(35,032) $32,475
Domestic$4,985 $(1,502)$(107,088)
Foreign14,176
 16,373
 19,710
Foreign17,319 3,426 14,176 
$(92,912) $(18,659) $52,185
$22,304 $1,924 $(92,912)
The components of the income tax expense (benefit) are as follows (in thousands):
 Fiscal Year Ended March 31,
  
202120202019
Current income tax expense:
Federal$14,701 $2,817 $3,902 
State2,426 1,850 (136)
Foreign9,902 9,712 10,618 
27,029 14,379 14,384 
Deferred income tax benefit:
Federal(18,190)(5,287)(25,347)
State(3,404)(2,897)(3,845)
Foreign(2,483)(1,517)(4,780)
(24,077)(9,701)(33,972)
$2,952 $4,678 $(19,588)
F-36

 Year Ended March 31,
  
2019 2018 2017
Current income tax expense (benefit):     
Federal$3,902
 $14,191
 $15,912
State(136) 1,925
 3,152
Foreign10,618
 12,249
 11,175
 14,384
 28,365
 30,239
Deferred income tax expense (benefit):     
Federal(25,347) (113,122) (8,278)
State(3,845) (10,037) 3,578
Foreign(4,780) (3,677) (6,645)
 (33,972) (126,836) (11,345)
 $(19,588) $(98,471) $18,894

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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)


The income tax expense (benefit) computed using the federal statutory income tax rate differs from NetScout's effective tax rate primarily due to the following:
Year Ended March 31, Fiscal Year Ended March 31,
2019 2018 2017 202120202019
Statutory U.S. federal tax rate21.0 % 31.6 % 35.0 %Statutory U.S. federal tax rate21.0 %21.0 %21.0 %
State taxes, net of federal tax effect3.4
 6.9
 9.7
State taxes, net of federal tax effect2.1 (47.8)3.4 
Research and development tax credits7.1
 39.5
 (8.2)
U.S. research and development tax creditsU.S. research and development tax credits(23.7)(245.9)7.1 
Effect of foreign operations(0.6) 15.5
 (6.7)Effect of foreign operations(5.3)(66.9)(0.1)
Meals and entertainment(1.0) (6.7) 2.5
Meals and entertainment0.7 43.7 (1.0)
Domestic production activities deduction
 13.8
 (4.0)
Change in valuation allowance2.2
 (0.2) (0.1)Change in valuation allowance24.0 250.0 2.2 
Stock Compensation(2.6) (2.5) 3.1
Internal restructuring chargesInternal restructuring charges196.5 
Stock compensationStock compensation5.2 172.1 (2.6)
Divestiture(1.0) 
 
Divestiture(1.0)
GILTI/FDII2.9
 
 
GILTI/FDII(20.2)(174.3)2.9 
BEAT(7.0) 
 
BEAT(7.0)
2017 Tax Act (transition tax and re-measurement of deferreds)0.4
 454.1
 
2017 Tax Act (transition tax and re-measurement of deferreds)0.4 
Foreign withholding(3.0) (21.0) 3.8
Foreign withholding13.8 220.6 (3.1)
Provision to returnProvision to return(2.3)(152.8)(1.0)
Other permanent differences(0.7) (3.3) 1.1
Other permanent differences(2.1)26.9 (0.1)
21.1 % 527.7 % 36.2 %13.2 %243.1 %21.1 %
 


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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)




The components of net deferred tax assets and liabilities are as follows (in thousands):
 Fiscal Year Ended March 31,
 20212020
Deferred tax assets:
Accrued expenses$8,480 $5,060 
Deferred revenue17,648 14,420 
Reserves2,898 3,216 
Pension and other retiree benefits6,160 5,078 
Net operating loss carryforwards11,526 12,443 
Tax credit carryforwards19,432 14,138 
Share-based compensation5,397 4,534 
Operating lease liability17,333 18,213 
Other deferred tax assets2,116 20 
Total gross deferred tax assets90,990 77,122 
Valuation allowance(11,406)(5,641)
Net deferred tax assets79,584 71,481 
Deferred tax liabilities:
Intangible assets(132,635)(146,950)
Other deferred tax liabilities(8,848)(8,061)
Operating lease right-of-use asset(14,474)(15,152)
Depreciation(7,818)(9,492)
Total deferred tax liability$(84,191)$(108,174)

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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)


 Year Ended March 31,
 2019 2018
Deferred tax assets:   
Accrued expenses$4,359
 $4,068
Deferred revenue11,278
 12,168
Reserves5,463
 3,375
Pension and other retiree benefits5,960
 5,307
Net operating loss carryforwards14,992
 21,251
Tax credit carryforwards9,043
 6,625
Share-based compensation5,505
 5,164
Other166
 418
Total gross deferred tax assets56,766
 58,376
Valuation allowance(835) (3,108)
Net deferred tax assets55,931
 55,268
Deferred tax liabilities:   
Intangible assets(164,199) (195,959)
Other Deferred Liabilities(1,609) 
Depreciation(7,134) (4,187)
Total deferred tax asset (liability)$(117,011) $(144,878)

Deferred tax assets and liabilities are recognized based on the anticipated future tax consequences, attributable to differences between financial statement carrying amounts of assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates in effect for the year in which the differences are expected to reverse. The Company evaluates the recoverability of deferred tax assets by considering all positive and negative evidence relating to future profitability. The Company weighs objective and verifiable evidence more heavily in this analysis. In situations where the Company concludes that it does not have sufficient objective and verifiable evidence to support the realizability of the asset it creates a valuation allowance against it. As a result, the Company established a valuation allowance of $3.1$5.6 million as of March 31, 20182020 and $0.8$11.4 million as of March 31, 2019, representing a decrease2021, representing an increase of $2.3$5.8 million. The decreaseincrease in the valuation allowance as of March 31, 2019,2021, as compared to March 31, 2018,2020, is primarily relateddue to deferred tax assets related to Psytechnics LtdU.S. foreign tax credits that the Company believes are not more likely than not to be realized. If it is later determined the Company is able to use all or a portion of the deferred tax assets for which a valuation allowance has been established, then the Company may be required to recognize these deferred tax assets throughas a tax benefit recorded in the period such determination is made.
At March 31, 2019,2021, the Company had U.S. federal net operating loss carry forwards of approximately $26$11 million, state net operating loss carryforwards of approximately $21$44 million and tax credit carryforwards of approximately $11$15 million. The net operating loss and credit carryforwards will expire at various dates beginning in 2021.2026. The Company also had foreign net operating loss carryforwards of approximately $59$45 million at March 31, 2019.2021 and foreign tax credit carryforwards of approximately $7 million. The majority of foreign net operating losses have no expiration dates. Utilization of the U.S. net operating losses and credits are subject to an annual limitation due to the ownership change limitations provided by the Internal Revenue Code of 1986, as amended, and similar state tax provisions.
The Company files U.S. federal tax returns and files returns in various state, local and foreign jurisdictions. With respect to the U.S. federal and primary state jurisdictions, the Company is no longer subject to examinations by tax authorities for tax years before 2015,2016, although carryforward attributes that were generated prior to 20152016 may still be adjusted upon examination if they either have been or will be used in a future period. The Company also receives inquiries from various tax jurisdictions during the year, and some of those inquiries may include an audit of the tax return previously filed. In the normal course of business, NetScout and its subsidiaries are examined by various taxing authorities, including the IRS in the United States.

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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)



A reconciliation of the beginning and ending amount of gross unrecognized tax benefits, excluding interest and penalties, for the fiscal years ended March 31, 2019, 20182021, 2020 and 20172019 is as follows (in thousands):
Year Ended March 31, Fiscal Year Ended March 31,
2019 2018 2017 202120202019
Balance at April 1,$2,215
 $2,926
 $1,588
Balance at April 1,$1,151 $1,314 $2,215 
Additions based on tax positions related to the current year28
 126
 46
Additions based on tax positions related to the current year48 49 28 
Release of tax positions of prior years(194) (481) (154)Release of tax positions of prior years(286)(212)(194)
Increase in unrecognized tax benefits as a result of a tax position taken during a prior period
 
 1,446
Decrease relating to settlements with taxing authorities(735) (356) 
Decrease relating to settlements with taxing authorities(735)
Balance at March 31,$1,314
 $2,215
 $2,926
Balance at March 31,$913 $1,151 $1,314 
The Company is unable to make a reliable estimate when cash settlement, if any, will occur with a tax authority as the timing of examinations and ultimate resolution of those examinations is uncertain. All of the unrecognized tax benefits would affect the effective tax rate if recognized.
The Company includes interest and penalties accrued in the consolidated financial statements as a component of the tax provision.
Several key provisions underDuring fiscal year 2019, the Company completed its analysis and recording of all the tax effects related to the Tax Cuts and Jobs Act of 2017 (TCJA), enacted on December 22, 2017, impact the Company. The final impactas required under SAB 118, and recorded a benefit of the TCJA, as described below, did not differ from the estimates reported at December 31, 2017. The key changes from the TCJA that were reported as of March 31, 2019 are the impact$87.0 million due to the reduced U.S. Federal corporate tax rate from 35.0% to 21.0%, a one-time transition tax on certain foreign earnings on which U.S. income tax was deferred, the Base Erosion Anti-Abuse Tax (BEAT), the deduction for Foreign Derived Intangible Income (FDII) and the Global Intangible Low Tax Income (GILTI).
The Company is required to record deferred tax assets and liabilities based on the enacted tax rate which they are expected to reverse in the future. Therefore, any U.S. related deferred taxes were re-measured from 35.0% down to 21.0% based on the recorded balances. As of December 31, 2017, the Company recorded an estimate related to the re-measurement of its deferred tax balances, which wastaxes and a benefit of approximately $87.0 million. During the third quarter of the current fiscal year the Company finalized its calculation and did not adjust its estimate recorded.
Additionally, the Company is required to calculate a$2.0 million one-time transition tax based on its total post-1986 foreign subsidiaries’ earnings and profits that were previously deferred from U.S. income taxes. As of December 31, 2017, the Company recorded an estimate related to this one-time transition charge of approximately $2.0 million. During the third quarter of the current fiscal year the Company finalized its calculation and did not adjust its estimate recorded.tax.
The Company is subject to a territorial tax system under the TCJA, in which we are required to provide for tax on the Global Intangible Low-Taxed Income (GILTI). earned by certain foreign subsidiaries. The Company is required to makehas established an accounting policy election of either (1) treating taxes due on future U.S. inclusions in taxable income related to provide for GILTI as a current periodtax expense when incurred (the "period cost method") or (2) factoring such amounts intoin the Company's measurement of its deferred taxes (the "deferred method"). The Company has elected to treat taxes due on future U.S. inclusions in taxable income related to GILTI as a current period expense when incurred (the "period cost method").year incurred.
The Company expects that current and future foreign earnings may be repatriated tax efficiently as a result of the TCJA. After fully assessing the impact of the TCJA, the Company has determined that its current and future foreign earnings will not be indefinitely reinvested where the Company can repatriate those earnings in a tax efficient manner acceptable to management and which comply with local statutory and operational requirements. Additionally, the Company intends a one-time repatriation of certain previously taxed historical earnings because of TCJA which can be repatriated in a tax efficient manner. The Company continues to assert that any remainder of itscertain historical book over tax outside basis in excess of tax basis will bedifferences primarily related to foreign unremitted earnings and cumulative translation adjustments are permanently reinvested. It is not practicable to estimateThe determination of the amount of unrecognized deferred U.S. taxes on these differences.


tax liability related to such outside basis differences is not practicable due to the uncertainty in the manner and timing in which such differences become taxable and is dependent upon various circumstances and factors, including availability of tax planning. The Company's intent is to only make distributions from its foreign subsidiaries in the future when they can be made at no or immaterial net tax cost.

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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)




NOTE 18 – LEASES
In February 2016, the FASB issued ASC 842 to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The Company adopted the guidance on April 1, 2019 using the modified retrospective method and as a result did not adjust comparative periods or modify disclosures in those comparative periods.
The new guidance provides a number of optional practical expedients in transition. The Company elected the package of practical expedients, which does not require the reassessment of prior conclusions about lease identification, lease classification and initial direct costs. Further, the Company elected the practical expedients to combine lease and non-lease components, and to not recognize right-of-use (ROU) assets and lease liabilities for short-term leases. Leases with an initial term of 12 months or less are classified as short-term leases. The Company did not elect the hindsight practical expedient to determine the lease term for existing leases.
The adoption of ASC 842 on April 1, 2019 resulted in the recognition of operating lease ROU assets of approximately $68.2 million, operating lease liabilities of approximately $83.2 million and the elimination of deferred rent of approximately $15.0 million. Operating leases are included in operating lease ROU assets and lease liabilities on the Company’s balance sheets. The adoption of ASC 842 did not have a material impact on the Company’s consolidated statement of operations, consolidated statement of stockholders' equity, consolidated statement of comprehensive income (loss) or consolidated statement of cash flows. The new standard had no material impact on liquidity and had no impact on the Company’s debt-covenant compliance under its current debt agreements.
The Company determines if an arrangement is a lease at inception. Right-of-use (ROU) assets represent the Company's right to use an underlying asset for the duration of the lease term. Lease liabilities represent the Company's contractual obligation to make lease payments over the lease term. ROU assets are recorded and recognized at commencement for the lease liability amount, plus initial direct costs incurred less lease incentives received. Lease liabilities are recorded at the present value of future lease payments over the lease term at commencement. The discount rate used is generally the Company's estimated incremental borrowing rate unless the lessor's implicit rate is readily determinable. Incremental borrowing rates are calculated periodically to estimate the rate the Company would pay to borrow the funds necessary to obtain an asset of similar value over a similar term. Lease expenses relating to operating leases are recognized on a straight-line basis over the lease term.
The Company has operating leases for administrative, research and development, sales and marketing and manufacturing facilities and equipment under various non-cancelable lease agreements. The Company's leases have remaining lease terms ranging from 1 year to 10 years. The Company's lease terms may include options to extend or terminate the lease where it is reasonably certain that the Company will exercise those options. The Company considers several economic factors when making this determination, including but not limited to, the significance of leasehold improvements incurred in the office space, the difficulty in replacing the asset, underlying contractual obligations, or specific characteristics unique to a particular lease. The Company's lease agreements do not contain any material residual value guarantees or material restrictive covenants.
Most of the Company's lease agreements contain variable payments, primarily for common area maintenance (CAM), which are expensed as incurred and not included in the measurement of the ROU assets and lease liabilities.
The components of operating lease cost for the fiscal years ended March 31, 2021 and 2020 were as follows (in thousands):
Fiscal Year Ended March 31,
20212020
Lease cost under long-term operating leases$13,092 $13,318 
Lease cost under short-term operating leases3,678 4,172 
Variable lease cost under short-term and long-term operating leases3,800 4,259 
Total operating lease cost$20,570 $21,749 

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Table of Contents
The table below presents supplemental cash flow information related to leases during the fiscal years ended March 31, 2021 and 2020 (in thousands):
Fiscal Year Ended March 31,
20212020
Right-of-use assets obtained in exchange for new operating lease liabilities$2,492 $11,127 

At March 31, 2021 and 2020, the weighted average remaining lease term in years and weighted average discount rate were as follows:
March 31, 2021March 31, 2020
Weighted average remaining lease term in years - operating leases7.708.59
Weighted average discount rate - operating leases4.1 %4.1 %

Future minimum payments under non-cancellable leases at March 31, 2021 are as follows (in thousands):
Year Ending March 31,
2022$14,085 
202312,890 
202410,299 
202510,098 
20269,087 
Thereafter29,286 
    Total lease payments$85,745 
     Less imputed interest(12,124)
     Present value of lease liabilities$73,621 


NOTE 1819 – COMMITMENTS AND CONTINGENCIES
AcquisitionAcquisition- and Divestiture RelatedDivestiture-Related
The Company has aCompany's Level 3 liabilities at March 31, 2021 consisted of contingent purchase consideration asset related to the divestiture of its HNT tools business in September 2018.2 acquisitions that occurred during the fiscal year 2020. The contingent purchase consideration asset represents potential future earnout payments to the Company of up to $4.0 million over two years that are contingent on the HNT tools business achieving certain milestones. The fair value of the contingent consideration of $2.3 million was recognized on the acquisition date and was measured using unobservable (Level 3) inputs. The contingent consideration asset at March 31, 2019 was $0.8 million.
The Company had a contingent liability at March 31, 2018 for $523 thousand related to the acquisition of Efflux in July 2017 for2 acquisitions represent amounts deposited into escrow accounts, which an escrow account waswere established to cover damages NetScout may have suffered related to any liabilities that NetScout did not agree to assume or as a result of the breach of representations and warranties of the sellersellers as described in the merger agreement. The $523 thousand was paid to the sellers in July 2018.
The Company had a contingent liability at March 31, 2018 for $4.9 million related to the acquisition of Simena LLC in November 2011, which was based on the ultimate settlement of assets and liabilities acquired as part of the transaction, and the former owners' future period of employment with NetScout.agreements. The contingent purchase consideration of $5.0$0.7 million and $1.0 million related to the Gigavation and Eastwind acquisitions, respectively were included as accrued other in the Company's consolidated balance sheet at March 31, 2020. The $0.7 million related to the Gigavation acquisition was paid to the seller in November 2018.
February 2021. The Company had $660 thousand of contingent purchase consideration$1.0 million related to the Eastwind acquisition of Avvasi Incorporated (Avvasi) in August 2016 for which an escrow account was established to cover damages NetScout may have suffered related to any liabilities that NetScout did not agree to assume or as a result of the breach of representations and warranties of the seller as described in the asset purchase agreement. The $660 thousand was paid to the seller in August 2017.April 2020.
During fiscal year 2019, the Company paid $0.5 million and $5.0 million of contingent liabilities to the sellers of Efflux Systems, Inc. (Efflux) and Simena, LLC (Simena), respectively related to prior acquisitions.
Legal
From time to time, NetScout is subject to legal proceedings and claims in the ordinary course of business. In the opinion of management, the amount of ultimate expense with respect to any current legal proceedings and claims, if determined adversely, will not have a material adverse effect on the Company’sCompany's financial condition, results of operations or cash flows.
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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)


As previously disclosed, in March 2016, Packet Intelligence LLC (Packet Intelligence or Plaintiff) filed a Complaint against NetScout and two2 subsidiary entities in the United States District Court for the Eastern District of Texas asserting infringement of five5 United States patents. Plaintiff’sPlaintiff's Complaint alleged that legacy Tektronix GeoProbe products, including the G10 and GeoBlade products, infringed these patents. NetScout filed an Answer denying Plaintiff’sPlaintiff's allegations and asserting that Plaintiff’sPlaintiff's patents were, among other things, invalid, not infringed, and unenforceable due to inequitable conduct. In October 2017, a jury trial was held to address the parties’parties' claims and counterclaims regarding infringement of three3 patents by the G10 and GeoBlade products, invalidity of these patents, and damages. On October 13, 2017, the jury rendered a verdict finding in favor of the Plaintiff and that Plaintiff was entitled to $3,500,000 for pre-suit damages and $2,250,000 for post-suit damages. The jury indicated that the awarded damages amounts were intended to reflect a running royalty. The Court also conducted a bench trial on whether these patents were unenforceable due to, among other things, inequitable conduct. In September 2018, the Court entered judgment and "enhanced" the jury verdict in the amount of $2.8 million as a result of a jury finding. The judgment also awards pre- and post judgementpost-judgment interest, and a running royalty on the G10 and GeoBlade products until the expiration of the patents at issue, the last date being June 2022. The Court denied the Plaintiff's motion for fees. Following the entry of final judgment, on June 12, 2019, NetScout filed motionsits Notice of Appeal. On July 14, 2020, the Court of Appeals for judgment asthe Federal Circuit issued a matterdecision vacating the $3,500,000 pre-suit damages award, affirming the $2,250,000 post-suit damages award, and remanding to the district court to determine what, if any, enhancement should be awarded. On March 15, 2021, NetScout filed a petition for a writ of law, seekingcertiorari to both overturn the verdictUnited States Supreme Court, which was subsequently denied, challenging, among other issues, the basis for enhanced damages and the patentability of the claimed technology. NetScout continues to reduce damages.avail itself of its legal options. NetScout has concluded that the risk of loss from this matterassociated with the post-suit damages award is currently neither remote nor probable,"probable" in accounting terms, regardless of the options NetScout may pursue, and therefore, under GAAP definitions,that the risk of loss associated with pre-suit damages is termed "reasonably possible". Therefore, accountingnow remote. Accounting rules require NetScout to provide an estimate for the range of potential liability. NetScout currently estimates that the estimated range of liability is between $0 and the aggregate amount awarded by the jury and the Court's awardsum of enhancedpost-suit damages, plus potential additional pre- and post-judgment interest amounts and costs and any royalties owed on post-trial sales of the accused G10 and GeoBlade products. NetScout intendsAny potential enhancement is not reasonably estimable but is likely within the range of $0 to continue to vigorously dispute Packet Intelligence’s claims including through appeal, if necessary.

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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)



$2,800,000.
Unconditional purchase obligationsPurchase Obligations
At March 31, 2019,2021, the Company had unconditional purchase obligations of $49.2$55.3 million, which represent estimated open purchase orders to purchase inventory as well as commitments for products and services used in the normal course of business.
Leases
NetScout leases office space under non-cancelable operating leases. Total rent expense under the leases was $16.3 million, $16.6 million and $13.8 million for the fiscal years ended March 31, 2019, 2018 and 2017, respectively.
At March 31, 2019, future non-cancelable minimum lease commitments (including office space, copiers and automobiles) are as follows (in thousands):
Year Ending March 31, 
2020$16,102
202111,059
20229,804
20238,807
20248,500
Remaining years43,997
Total minimum lease payments$98,269

NOTE 1920 – SEGMENT AND GEOGRAPHIC INFORMATION
The Company manages its business in the following geographic areas: United States, Europe, Asia and the rest of the world. In accordanceThe Company's policies mandate compliance with United States export control regulations, the Company does not sell or do business with countries subject to economic sanctions and export controls. The Company reports revenues and income under 1 reportable segment.
Total revenue by geography is as follows (in thousands):
Year Ended March 31, Fiscal Year Ended March 31,
2019 2018 2017 202120202019
United States$553,267
 $581,853
 $722,440
United States$484,129 $545,620 $553,267 
Europe148,036
 174,445
 193,441
Europe160,372 154,510 148,036 
Asia72,355
 88,917
 95,735
Asia56,562 59,939 72,355 
Rest of the world136,260
 141,572
 150,496
Rest of the world130,219 131,751 136,260 
$909,918
 $986,787
 $1,162,112
$831,282 $891,820 $909,918 
The United States revenue includes sales to resellers in the United States. These resellers fulfill customer orders and may subsequently ship the Company’sCompany's products to international locations. Further, the Company determines the geography of its sales after considering where the contract originated. A majority of revenue attributable to locations outside of the United States is a result of export sales. Substantially all of the Company’sCompany's identifiable assets are located in the United States.
NOTE 20 - RELATED PARTY TRANSACTIONS
During the Company's fiscal year ended March 31, 2016 and the three months ended June 30, 2016, a member of the Company’s Board of Directors served as an executive officer of Danaher. As part of the split off of Danaher’s Communications Business and the Company’s subsequent acquisition of that business from Newco's shareholders, NetScout entered into multiple transactions with Danaher which include: transition services agreements, lease agreements, closing agreements, and compensation for post-combination services provisions within the separation and distribution agreement. This board member is now the founding President and CEO of Fortive Corporation (Fortive), which spun off of Danaher in July 2016. As of September 12, 2018, this person is no longer serving on the Company's Board of Directors. As part of the spin-off of Fortive, the transition services agreement was amended to, among other things, assign Danaher's rights, duties, obligations and liabilities

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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)



under the transition services agreement to Fluke Corporation, a subsidiary of Fortive. The Company has disclosed the transactions with Danaher and Fortive parenthetically within the financial statements.
As disclosed parenthetically within the Company's consolidated balance sheet, the Company has receivables from related parties. The following table summarizes those balances (in thousands):
 March 31, 2019 March 31, 2018
Danaher$
 $252
Fortive335
 2,935
 $335
 $3,187
As disclosed parenthetically within the Company's consolidated balance sheet, the Company has payables due to related parties. The following table summarizes those balances (in thousands):
 March 31, 2019 March 31, 2018
Fortive$244
 $369
 $244
 $369
As disclosed parenthetically within the Company's consolidated statements of operations, the Company has recorded expenses from related parties. The following table summarizes those balances (in thousands):
 Year Ended March 31,
 2019 2018 2017
Danaher:     
Cost of product revenue$
 $
 $4,690
Cost of service revenue
 
 485
Research and development expenses
 
 1,720
Sales and marketing
 2
 2,273
General and administrative expenses
 7
 2,551
 $
 $9
 $11,719
Fortive:     
Cost of product revenue$
 $245
 $2,539
Cost of service revenue529
 665
 260
Research and development expenses20
 3
 (96)
Sales and marketing
 
 150
General and administrative expenses20
 1,696
 1,548
Other income
 (56) (426)
 $569
 $2,553
 $3,975

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NetScout Systems, Inc.
Notes to Consolidated Financial Statements—(Continued)



As disclosed within the Company's consolidated statements of cash flows, the Company has cash flows from operating activities resulting from amounts due to related parties and due from related parties. The following table summarizes those cash flows from operating activities (in thousands):
 Year Ended March 31,
 2019 2018 2017
Due from related party:     
   Danaher$58
 $96
 $17,310
   Fortive114
 347
 7,745
       Total$172
 $443
 $25,055
      
Due to related party:     
   Danaher$243
 $
 $(2,954)
   Fortive(9) (75) 162
       Total$234
 $(75) $(2,792)
As disclosed within the Company's consolidated statements of cash flows, the Company has cash flows from investing activities resulting from amounts due from related parties. The following table summarizes those cash flows from investing activities (in thousands):
 Year Ended March 31,
 2019 2018 2017
Due from related party:     
   Danaher$
 $
 $12,864
       Total$
 $
 $12,864
The Company recognized $0, $45 thousand, and $177 thousand in revenue from Danaher during the fiscal years ended March 31, 2019, 2018, and 2017 in the ordinary course of business.
A member of the Company’s Board of Directors served as a member of the board of directors for EMC Corporation (EMC) during the fiscal years ended March 31, 2017 and 2016, and therefore, the Company considered sales to EMC to be a related party transaction. During the quarter ended September 30, 2016, EMC was acquired by Dell Technologies and EMC's board member resigned. The Company continued to report the wind down of preexisting transactions as related party transactions through the Company's fiscal year 2017. The Company recognized $167 thousand in revenue from EMC during the fiscal year ended March 31, 2017 in the ordinary course of business.
A member of the Company’s Board of Directors served as a trustee for Boston College during the fiscal years ended March 31, 2017 and 2016 and a portion of the fiscal year ended March 31, 2018 and therefore, the Company considers sales to Boston College to be a related party transaction. The Company recognized $150 thousand and $0 in revenue from Boston College during the fiscal years ended March 31, 2018 and 2017, respectively, in the ordinary course of business.

NOTE 21 – QUARTERLY RESULTS OF OPERATIONS – UNAUDITED
The following table sets forth certain unaudited quarterly results of operations of NetScout for the fiscal years ended March 31, 2019 and 2018. In the opinion of management, this information has been prepared on the same basis as the audited consolidated financial statements and all necessary adjustments, consisting only of normal recurring adjustments, have been included in the amounts stated below to present fairly the quarterly information when read in conjunction with the audited consolidated financial statements and notes thereto included elsewhere in this Annual Report on Form 10-K. The quarterly operating results are not necessarily indicative of future results of operations.
 Three Months Ended
 (in thousands, except per share data)
 March 31, 2019 Dec. 31,
2018
 Sept. 30,
2018
 June 30,
2018
 March 31, 2018 Dec. 31,
2017
 Sept. 30,
2017
 June 30,
2017
Revenue$235,002
 $246,008
 $223,797
 $205,111
 $235,224
 $268,944
 $256,863
 $225,756
Gross profit$176,466
 $176,424
 $159,817
 $143,084
 $168,633
 $204,435
 $182,620
 $159,194
Net income (loss)$19,211
 $(3,603) $(26,428) $(62,504) $16,817
 $89,685
 $(2,468) $(24,222)
Diluted net income (loss) per share$0.24
 $(0.05) $(0.34) $(0.78) $0.20
 $1.02
 $(0.03) $(0.27)

NOTE 22 – SUBSEQUENT EVENTS
On May 7, 2019, the Company repaid $50.0 million of borrowings under the Amended Credit Agreement.

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NetScout Systems, Inc.
Schedule II—Valuation and Qualifying Accounts
(in thousands)
 
 
Balance at
Beginning
of Year
 
Additions
Resulting in
Charges to
Operations
 
Charges to
Other
Accounts
  
Deductions
Due to Write-Offs
 
Balance at
End of Year
Year ended March 31, 2017          
Allowance for doubtful accounts$5,069
 $6,961
 $(7,580)   $(2,384) $2,066
Deferred tax asset valuation allowance$3,777
 $(338) $(65)
 $
 $3,374
Year ended March 31, 2018          
Allowance for doubtful accounts$2,066
 $695
 $(346)   $(424) $1,991
Deferred tax asset valuation allowance$3,374
 $
 $
   $(266) $3,108
Year ended March 31, 2019          
Allowance for doubtful accounts$1,991
 $826
 $(464)  $(770) $1,583
Deferred tax asset valuation allowance$3,108
 $905
 $
  $(3,178) $835
Balance at
Beginning
of Fiscal Year
Additions
Resulting in
Charges to
Operations
Charges to
Other
Accounts
Deductions
Due to Write-Offs
Balance at
End of Fiscal Year
Fiscal year ended March 31, 2019
Allowance for credit losses$1,991 $826 $(464)  $(770)$1,583 
Deferred tax asset valuation allowance$3,108 $905 $

$(3,178)$835 
Fiscal year ended March 31, 2020
Allowance for credit losses$1,583 $1,450 $(1,202)  $(481)$1,350 
Deferred tax asset valuation allowance$835 $4,806 $  $$5,641 
Fiscal year ended March 31, 2021
Allowance for credit losses$1,350 $48 $(733)$(249)$416 
Deferred tax asset valuation allowance$5,641 $5,765 $$$11,406 
 



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