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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 December 31, 20142016
or
oTRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
 For the transition period from             to             
Commission file number: 001-34511

 FORTINET, INC.
(Exact name of registrant as specified in its charter)


Delaware77-0560389
(State or other jurisdiction of
incorporation or organization)
(I.R.S. Employer
Identification No.)
899 Kifer Road
Sunnyvale, California
94086
(Address of principal executive offices)(Zip Code)
(408) 235-7700
(Registrant’s telephone number, including area code)
 
 Securities registered pursuant to Section 12(b) of the Act: 
Common Stock, $0.001 Par Value The NASDAQ Stock Market LLC
   
(Title of each class) (Name of exchange on which registered)
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  x    No  o
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  o No  x



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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 (“Exchange Act”) 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  x    No  o
Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Website, 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  x  No  o 
Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405 of this chapter) is not contained herein, and will not be contained, to the best of the registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. x
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. 
Large accelerated filerx  Accelerated filero
Non-accelerated filero(Do not check if smaller reporting company) Smaller reporting companyo
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).    Yes  o     No  x
The aggregate market value of voting stock held by non-affiliates of the registrant, as of June 30, 2014,2016, the last business day of the registrant’s most recently completed second quarter, was $3,163,303,736$3,631,280,546 (based on the closing price for shares of the registrant’s common stock as reported by The NASDAQ Global Select Market on that date). Shares of common stock held by each executive officer, director, and holder of 5% or more of the registrant’s outstanding common stock have been excluded in that such persons may be deemed to be affiliates. This determination of affiliate status is not necessarily a conclusive determination for other purposes.
As of February 20, 2015,17, 2017, there were 168,865,460175,320,023 shares of the registrant’s common stock outstanding.
DOCUMENTS INCORPORATED BY REFERENCE
Portions of the registrant’s definitive Proxy Statement relating to its 20152017 Annual Meeting of Stockholders are incorporated by reference into Part III of this Annual Report on Form 10-K where indicated. Such Proxy Statement will be filed with the United States Securities and Exchange Commission (“SEC”) within 120 days after the end of the fiscal year to which this report relates.




FORTINET, INC.
ANNUAL REPORT ON FORM 10-K
For the Fiscal Year Ended December 31, 20142016
Table of Contents
 
   
  Page
   
 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.
 


 


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Part I

ITEM 1.    Business
    
Overview

Fortinet is a global leader and innovator in network security. We provide high performance cyber securitycybersecurity solutions to somea wide variety of the largest enterprise,enterprises, service providers and government organizations of all sizes across the globe, including a majority of the 20142016 Fortune 100. We provide protection against cyberattacks and the technology to take on increasing security performance requirements of the network. We offer a broad range of security products and solutions, providing customers with an integrated network security architecture and a single source of threat intelligence to identify and minimize security gaps.

The cyber threat environment is unprecedented both in terms of volume and sophistication of attacks. As a result, cybersecurity has increased in priority and management complexity for enterprises. The growing presence of the Internet of Things (“IoT”) and the move to the cloud necessitate increased levels of visibility and security orchestration across an expanding ecosystem of networks. Our cybercommon operating system, centralized management and open application program interfaces allow many of the solutions in our portfolio, along with those of our partner community, to be combined to create an Internet-based, integrated network security architecture (the “Fortinet Security Fabric”) designed to correlate threat intelligence, identify and respond to sophisticated threats and help protect complex next-generation environments.

The Fortinet Security Fabric provides an intelligent architectural approach to security that enables enterprises to weave together their traditionally discrete security solutions are fastinto an integrated whole. This end-to-end designed solution ensures ongoing security efficacy through a single source of threat intelligence, and secureprovides a unified management and orchestration platform designed to minimize complexity and risk. Our patented cybersecurity innovations provide organizations with a broad high-performancerange of security products and services focused on the edge and segmentation firewall, advanced threat protection against dynamic(“ATP”), data center security, threats while simplifying the information technologycloud security, secure access, endpoint and IoT device protection and connected unified threat management (“IT”UTM”) infrastructure of our end-customers worldwide..

Our flagship integrated network security solution consists of our FortiGate physical, software and virtual appliance products thatcloud solutions, which are deployable in the business environments of large enterprises, service providers and small and medium-sized businesses, as well as government organizations. These platforms provide a broad array of integrated security and networking functions to help protect data, applications and users from network- and content-level security threats. These functions, which can be integrated in a variety of ways, include firewall, intrusion prevention (“IPS”) anti-malware, application control, virtual private network (“VPN”), web-filtering, vulnerability management, anti-spam, mobile security, wireless controller,controllers, access control and wide area network (“WAN”) acceleration. Our FortiGate appliancesappliance platform may be deployed as Next Generation Firewallscore firewalls, internal segmentation firewalls, next generation firewalls (“NGFW”), Data Center Firewallsdistributed firewalls, virtual firewalls, cloud firewalls, carrier class firewalls, data center firewalls (“DCFW”), Unified Threat Management and connected UTM systems. For access networks, we offer wireless access points and switch appliances, which integrate secure wireless and wired access capabilities into the FortiGate network security platform.

FortiGate products integrate our high-performance Security Processing Unit (“UTM”) systems, Internal Network Firewall (“INFW”SPU”), Virtual Machine Firewalls or Cloud Firewalls. Our FortiGate appliances range from the FortiGate-20 series for small businesses and branch offices to the FortiGate-5000 series for large enterprises and service providers, and are based on our proprietary technology platform. This platform includes our FortiASICs, which areis specifically designed for the accelerated processing of security and networking functions, and our FortiOS operating system, which provides thea foundation for all FortiGate security functions. Our FortiGuardFortiGate, FortiManager, FortiAnalyzer and other related products work to provide deployment flexibility and visibility across physical and virtual networks and private, hybrid and public cloud infrastructure, as well as to endpoint and IoT devices. FortiManager provides customers with centralized management of multiple FortiGates, and FortiAnalyzer provides a single point of network log data collection. FortiSIEM provides organizations with a security subscription services provide end-customersintelligence solution covering the extended network from IoT to the cloud, with accesspatented analytics that help manage network security, performance and compliance standards, all delivered through a single view. These products enable customers to dynamic updates to our application control, anti-malware, intrusion prevention, web filtering,implement security policies across large and anti-spam functionality. Our security services are based on intelligence gathered by our FortiGuard Labs team, which is comprised of a large team of threat researchers who detect threats and help protect our customers. By combining multiple proprietary security and networking functions with our purpose-built FortiASIC and FortiOS, our FortiGate solution delivers broad protection against dynamic security threats while reducing the operational burden and costs associated with managing multiple point products.increasingly distributed networks.

WeThe Fortinet Security Fabric also includes an array of products that further complement our FortiGate product line with the FortiManager product family, which enables end-customersproducts to manage the system configuration and security functions of multiple FortiGate devices from a centralized console, as well as the FortiAnalyzer product family, which enables collection, analysis and archiving of content and log data generated by our products. We also offer other product lines that provide additional protection such as:

from security threats across networks. These products include our FortiMail email security, FortiSandbox ATP, FortiWeb web application firewall, FortiDDoS distributed denial of service attack mitigation appliances, FortiDB database security appliances, FortiClient endpoint security software, FortiAP secure wireless access points;
FortiWeb, security for web-based applications;
FortiMail, multi-feature, high performance messaging security;
FortiDB, centrally managed database-specific security;
FortiClient, endpoint security for desktops, laptopspoints and mobile devices which is primarily used in conjunction with our FortiGate appliances;
FortiScan, endpoint vulnerability assessment and remediation;
FortiSwitch Ethernet switches;
FortiBridge, bypass appliances to help ensure network availability;
FortiAuthenticator, scalable secure authentication for enterprise networks;
FortiADC, Application Delivery Controller (“ADC”) optimizing the availability and performance of mobile, cloud, and enterprise applications;
FortiSandbox, detecting and mitigating Advanced Persistent Threats (“APTs”);
FortiCache, reducing the cost of and impact of cached internet content;
FortiDNS, providing secure Domain Name System (“DNS”) caching;
FortiDDoS, protection against Distributed Denial of Service (“DDOS”) attacks; and
FortiVoice, business telephone communication.switch connectivity products.

WeSupporting virtual and cloud-based deployments, we offer virtual appliancessoftware licenses for the FortiGate, FortiManager, FortiAnalyzer, FortiWeb, FortiMail FortiCache, and FortiADCFortiSandbox product lines that can be used in conjunction with traditional FortinetFortinet’s physical appliances, such as FortiGate, FortiManager, and FortiAnalyzer,virtual appliances to help ensure the visibility, management and protection of physical and virtualvirtualized environments. We also offer on-demand cloud-based versions of FortiGate and FortiWeb.


We complement our cybersecurity portfolio with FortiGuard security subscription and FortiCare technical support services, professional services and training services. Our FortiGuard security subscription uses global threat feeds and dedicated threat analysts to create real-time threat intelligence and security updates to complement and enhance Fortinet products. Our global FortiCare customer support team provides global technical support for all Fortinet products. We also provide a range of professional services to help organizations with the planning, design, implementation and optimization of their security infrastructures and technical training for customers and partners through our Network Security Expert Program.

We typically sell our security solutions to channel partners, who in turn sell to end-customers. We also sell directly to end customers. Our end-customers are from a wide range of industries, including telecommunications, technology, government, financial services, education, retail, manufacturing and healthcare.

During our fiscal year ended December 31, 20142016, we generated total revenue of $770.4 million$1.28 billion and net income of $25.3 million.$32.2 million. See Part II, Item 8 of this Annual Report on Form 10-K for more information on our consolidated balance sheets as of

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December 31, 20142016 and 20132015 and our consolidated statements of operations, comprehensive income, stockholders’ equity, and cash flows for each of the three years ended December 31, 2014, 2013,2016, 2015 and 2012.2014.

We were incorporated in Delaware in November 2000. Our principal executive office is located at 899 Kifer Road, Sunnyvale, California 94086 and our telephone number at that location is (408) 235-7700.

Technology and Architecture

Our proprietary FortiASICSPU hardware architecture, FortiOS operating system and associated security and networking functions combine to form a platform that integratesthe Fortinet Security Fabric. This approach to security features andties together all discrete security solutions into an integrated whole, which enables our products to perform sophisticated security processing for networks with high throughput requirements.requirements across a broad threat landscape.

FortiASICSPU

Our proprietary FortiASIC familySPU consists of Application-Specific Integrated Circuits (“ASICs”) is comprisedconsisting of three main lines of processors: (i) the FortiASIC content processorContent Processor (“SPU CP”), (ii) the FortiASIC network processorNetwork Processor (“SPU NP”), and (iii) the FortiASIC system-on-a-chipSystem-on-a-Chip (“SPU SOC”). Our customproprietary ASICs are designed to enhance the sophisticated security processing capabilities implemented in software by accelerating computation-intensivecomputationally intensive tasks such as firewall policy enforcement, ornetwork address translation, IPS anomaly detection.threat detection and encryption. This architecture provides the flexibility of implementing accelerated processing of new threat detection without requiring a new ASIC. The FortiASICSPU CP is currently included in most of our entry-level and all of our mid-range and high-end FortiGate appliances. The FortiASICSPU NP is currently included in some of our mid-range and high-end FortiGate appliances, delivering additional accelerated firewall and VPN performance. Entry-level FortiGate products (FortiGate 20 to 100 series) often use the SOC2.SPU SOC2 or SPU SOC3 to provide the necessary acceleration at this level. Mid-range FortiGate products (FortiGate 200 to 800900 series) use a central processing unit (“CPU”) and include the SPU NP and CP.SPU CP hardware acceleration. The high-end FortiGate products (FortiGate 1000 to 50007000 series) use multiple CPUs, SPU CPs and SPU NPs.
 
FortiOS

Our proprietary FortiOS operating system provides the foundation for the operation of all FortiGate appliances, fromwhether physical, virtual, private or public cloud or on-demand based, and is at the heart of our Security Fabric implementation. The core kernel functions to the security processing feature sets.sets work together to provide a highly integrated solution. FortiOS provides (i) multiple layers of security, including a hardened kernel layer providing protection for the FortiGate system, (ii) a network security layer providing security for end-customers’ network infrastructures and (iii) application content protection providing security for end-customers’ workstations and applications. FortiOS directs the operations of processors and ASICsSPUs and provides system management functions such as command-line, and graphical user interfaces.interfaces, multiple network and security topology views.

Key high-level functions and capabilities of FortiOS include:

key enabling for the Fortinet Security Fabric architecture;
helping enable FortiGate appliances to be configured into different security environments such as our Internal Network Firewall, Next Generation Firewall,NGFW and the Data Center Firewall;DCFW;
configuration of the physical aspects of the appliance such as ports, Wi-Fi and switching;
key network functions such as routing and deployment modes (network routing, transparent, sniffer, etc.);
implementation of security updates delivering advanced threat protection,ATP, such as IPS, antivirus and application control;

access to cloud-based web and email filtering databases;
direct integration with both cloud and on premises FortiSandbox technology;
security policy objects and enforcement;
data leak prevention and document finger printing; and
real-time reporting and logging.

We make updates to FortiOS available through our FortiCare technical support services. FortiOS also enables advanced, integrated routing and switching, allowing end-customers to deploy FortiGate devices within a wide variety of networks, as well as providing a direct replacement solution option for legacy switching and routing equipment. FortiOS implements a suite of commonly used standards-based routing protocols as well as address translation technologies, allowing the FortiGate appliance to integrate and operate in a wide variety of network environments. Additional features include Virtual Domain (“VDOM”),virtual domain capabilities, and traffic queuing and shaping. These features enable administrators to set the appropriate configurations and policies that meet their infrastructure needs. FortiOS also provides capabilities for logging of traffic for forensic analysis purposes which are particularly important for regulatory compliance initiatives like payment card industry data security standard (“PCI DSS”).standard. FortiOS is designed to help control network traffic in order to optimize performance by including functionality such as packet classification, queue disciplines, policy enforcement, congestion management, WAN optimization and caching.



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Products

Our core product offerings consist of our FortiGate product family, along with our FortiManager central management, and FortiAnalyzer central logging and reporting product families, bothall of which are typically purchased to complement commercial and enterprise deployments. Our FortiGate physical and software licenses are sold with a largeset of broad security services. These security services are enabled by FortiGuard which provides extensive threat research and a global cloud network to deliver protection services to each FortiGate deployment.appliance.

FortiGate

Our flagship FortiGate physical and virtual appliancessoftware licenses offer a broad set of security and networking functions, including firewall, intrusion prevention, anti-malware, VPN, application control, web filtering, anti-spam and WAN acceleration. All FortiGate models run on our FortiOS operating system. Substantially all of the FortiGate physical appliances include our FortiASICs to accelerate content and network security features implemented within FortiOS. FortiGate platforms can be centrally managed through both embedded web-based and command line interfaces, as well as through FortiManager, which provides central management architecture for up to thousands of FortiGate physical and virtual appliances.software licenses across a range of hypervisor platforms.

By combining multiple network security functions in our purpose-built security platform, the FortiGate appliances provide broad, high quality protection capabilities and deployment flexibility while reducing the operational burden and costs associated with managing multiple point products. With over 30 models in the FortiGate product line, FortiGate is designed to address security requirements for small- to mid-sizedmedium-sized businesses, large enterprises, service providers and government organizations worldwide.

Each FortiGate model runs on our FortiOS operating system, and substantiallyTypically, all FortiGate physical appliances include our FortiASICs.SPUs to accelerate content and network security features implemented within FortiOS. The significant differences between each model are the performance and scalability targets each model is designed to meet, while the security features and associated services offered are common throughout all models. The FortiGate-20 through -100 series models are designed for perimeter protection for small- to mid-sizedmedium-sized businesses. The FortiGate-200 through -800-900 series models are designed for perimeter deployment in mid-sizedmedium-sized to large enterprise networks. And, theThe FortiGate-1000 through -5000-7000 series models deliver high performance and scalable network security functionality for perimeter, data center and core deployment in large enterprise and service provider networks.

We also incorporate additional technologies within FortiGate appliances that differentiate our solutions, including data leakage protection, (“DLP”), traffic optimization, SSLsecure socket layer inspection, threat vulnerability management and wireless controller technology. In addition to these in-built features, we offer a full range of wireless access points and controllers, complementing FortiGate with the flexibility of wireless local area network access.

FortiSandbox

The FortiSandbox technology delivers proactive detection and mitigation with the capability to generate a directly actionable protection capability. Available in both hardware and cloud-based form, the FortiSandbox technology has a dual-layer sandbox complemented by FortiGuard’s anti-malware intelligence. FortiSandbox allows suspicious code to be subject to a set of multi-layer protection techniques culminating in execution within an operating system to allow detailed real-time behavioral analysis to be performed. When malicious code is identified in this way, a signature can be generated locally for distribution across

the Fortinet Security Fabric. Additional insight on the nature of the threat is provided through an intuitive dashboard showing threat information, including system activity, exploit efforts, web traffic and any related subsequent downloads. In addition to integrating within FortiOS, the FortiSandbox can also deliver its detection and local threat intelligence to registered FortiMail, FortiWeb appliances and FortiClient enabled end points.

FortiSIEM

Our FortiSIEM family of products provides a cloud-ready security information and event management (“SIEM”) solution for enterprises and service providers. FortiSIEM unifies analytics that are traditionally monitored discretely, parses the information and then processes it in an event-based analytics engine for handling real-time searches, rules, dashboards and ad-hoc queries. This unification of diverse sources of data enables organizations to create comprehensive dashboards and reports to identify root causes of threats, and take the steps necessary to remediate and prevent them in the future. Our FortiSIEM products are available either through subscription or perpetual licenses. 

Fortinet Management and Analysis Products

Our FortiManager and FortiAnalyzer physical and virtualsoftware products are typically sold in conjunction with a large FortiGate deployment.most commercial and enterprise deployments.

FortiManager. Our FortiManager family of products provides a central and scalable management solution for our FortiGate products, including the wide variety of networksoftware updates, configuration, policy settings and security features offered within FortiOS.updates. One FortiManager product is capable of managing thousands of FortiGate units, and also provides central management for FortiClient software.units. FortiManager facilitates the coordination of policy-based provisioning, device configuration and operating system revision management, as well as network security monitoring and device control.

FortiAnalyzer. Our FortiAnalyzer family of products provides centralized network logging, analyzing and reporting solutions that securely aggregate content and log data from our FortiGate devices and other Fortinet products as well as third-party devices to enable network logging, analysis and reporting.

We also offer other physical and virtual appliances and software that protect our end-customers from security threats to other critical areas in the enterprise, such as messaging, web-based applications and databases, and employees’ computers or mobile devices.

Services

FortiGuard Security Subscription Services

Security requirements are dynamic due to the constantly changing nature of threats. Our FortiGuard Labs global threat research team uses automated and manual processes to identify emerging threats, collects threat samples, and FortiGuard Labs replicates, reviews, characterizes and characterizes attacks.collates attack data. Based on this research, we develop updates for virus signatures, attack definitions,

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scanning engines and other security solution components to distribute to end-customers. Our FortiGuard security subscription services are designed to allow us to quickly deliver new threat detection capabilities to end-customers worldwide as new threats evolve. End-customers purchase FortiGuard security subscription services in advance, typically with terms of one to three years, to obtain access to regular updates for application control, antivirus, intrusion prevention, web filtering and anti-spam functions for our FortiGate products; antivirus, web filtering and anti-spamVPN functions for our FortiClient software; antivirus and anti-spam functions for our FortiMail products; vulnerability management for our FortiGate, FortiAnalyzer and FortiScan products,FortiMonitor products; database functions for our FortiDB appliance,appliance; web functions for our FortiWeb appliances,appliances; and advanced threat protectionATP for our FortiSandbox on premise and cloud products. We provide FortiGuard security subscription services 24 hours a day, seven days a week.
 
FortiCare Technical Support Services

Our FortiCare services are ourportfolio includes technical support services for the software, firmware and hardware in our products,extended product warranty, as well as our extended product warranty service. In additionadvanced services to our standard support service offering, we offer a premium service that offers faster response timesassist customers with the implementation and dedicated support oriented towards mission-critical applications.

maintenance of their security appliances. For our standard technical support, offering for our products, channel partners oftenmay provide first level support to the end-customer, especially for smallsmall- and mid-sized end-customers, and we typicallymedium-sized end-customers. We also provide second and third levelall levels of support to our end-customers.end-customers, as well as second- and third-level support where appropriate. We also provide knowledge management tools and customer self-help portals to help augment our support capabilities in an efficient and scalable manner. We deliver technical support to partners and end-customers 24 hours a day, seven days a week through regional technical support centers located worldwide.

Training Services

We offer training services In addition to our end-customersappliance technical support services, we offer a range of advanced services, including premium support and channel partners through our training department and authorized training partners. We have also implemented a training certification program to help ensure an understanding of our products andprofessional services.

Professional Services

We offer professional services to end-customers primarilyincluding Technical Account Managers (“TAMs”), Resident Engineers (“REs”) and professional service consultants for large implementations where expert technical resourcesimplementations.

Dedicated support engineers are required. available to help identify and eliminate issues before problems arise. These TAMs and REs are seasoned professionals with broad and deep experience in the security and networking field. Each TAM and RE acts as a single point of contact and customer advocate within Fortinet, and is focused on building and maintaining a deep understanding of our customers’ businesses and security requirements.

Our professional services consultants help in the design of deployments of our products and work closely with end-customer engineers, managers and other project team members to implement our products according to design, utilizing network analysis tools, attack simulation software and scripts.

Training Services

We offer training services to our end-customers and channel partners through our training department and authorized training partners. We have also implemented a training certification program, Network Security Expert, to help ensure an understanding of our products and services.

Customers

We typically sell our security solutions throughto channel partners, who in turn sell to end-customers of various sizes—fromsizes and, at times, we also sell directly to end-customers. Our end-customers include small and medium-sized businesses, to large enterprises, government organizations, and service providers—andproviders, across a varietywide range of industries, including telecommunications, technology, government, financial services, education, retail, manufacturing and healthcare for a variety of security functions across a variety of deployment scenarios.healthcare. An end-customer deployment may involve one of our appliances or thousands, depending on our end-customers’end-customer’s size and security requirements. We also offer access to our products via the cloud through certain cloud providers such as Amazon Web Services and Microsoft Azure. Many of our customers also purchase our FortiGuard security subscription services and FortiCare technical support services. For information regarding our sales by customer location,geographic revenue based on billing address, see Note 14 to our consolidated financial statements in Part II, Item 8 of this Annual Report on Form 10-K.

During fiscal 2014, fiscal 2013, and fiscal 2012, oneOne distributor, Exclusive Networks Group (“Exclusive”), which distributed our solutions to a large group of resellers and end-customers, accounted for 15%, 12%,18% and 11%20% of total revenue during 2014, 2015 and 2016, respectively.

Sales and Marketing

We primarily sell our products and services directlythrough a distribution model. We sell to distributors that sell to networking security and enterprise-focused resellers and service providers, who, in turn, sell to our end-customers. In certain cases, we sell directly to government-focused resellers, veryas well as to large service providers and major systems integrator partnersfinancial institutions who have large purchasing power and unique customer deployment demands. We work with many of the world’s leading technology distributors, including Exclusive, Networks Group,Fine Tec Computer, Ingram Micro Inc., Fine Tec Computer, and Arrow Electronics, IncInc., and enterprise security-focused resellers including AccuvantWestcon and Fishnet Security.Tech Data.

We support our channel partners with a dedicated team of experienced channel account managers, sales professionals and sales engineers who provide business planning, joint marketing strategy, and pre-sales and operational sales support. Additionally, our sales team often helpsteams help drive and support large enterprise and service provider sales through a direct touch model. Our sales

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professionals and engineers typically work closely with our channel partners and directly engage with large end-customers to help address their unique security and deployment requirements. Our sales cycle for an initial end-customer purchase typically ranges from three to six months but can be longer especially for large enterprises, service providers and government organizations. To support our broadly dispersed global channel and end-customer base, we have sales officesprofessionals in over 3080 countries around the world.

Our marketing strategy is focused on building our brand and driving end-customer demand for our security solutions. We execute this strategy by leveraginguse a combination of internal marketing professionals and a network of regional and global channel partners. Our internal marketing organization is responsible for messaging, branding, demand generation, product marketing, channel marketing, event marketing, digital marketing, communications, analyst relations, public relations and sales support programs.enablement. We focus our resources on campaigns, programs tools and activities that can be leveraged by partners worldwide to extend our marketing reach, such as sales tools and collateral, product awards and technical certifications, media engagement, training, regional seminars and conferences, webinars and various other demand-generation activities.

In fiscal 2014,2016, we investedcontinued to invest in sales and marketing to capture market share, particularly in the enterprise market where enterprise customers tend to have a higher lifetime value, and to acceleratefurther improve our growth. We intend to continue investingto make investments in our sales resources and infrastructure and marketing in orderstrategy, which are critical to capture additional market share in the high-return enterprise market, which we believe also offers higher lifetime value.support our growth.
 

Manufacturing and Suppliers

We outsource the manufacturing of our security appliance products to a variety of contract manufacturers and original design manufacturers. Our current manufacturing partners include Flextronics International Ltd., Micro-Star International Co., Ltd.Wistron Corporation, Flextronics International Ltd, Senao Networks, Inc., Adlink Technology, Inc., Senao Networks, Inc., and a number of Taiwan-based manufacturers. We submit purchase orders to our contract manufacturers that describe the type and quantities of our products to be manufactured, the delivery date and other delivery terms. Once our products are manufactured, they are sent to either our headquarterswarehouse in Sunnyvale, California, or to our logistics partner in Taoyuan City, Taiwan, where accessory packaging and quality-control testing are performed. We believe that outsourcing our manufacturing and a substantial portion of our logistics enables us to focus resources on our core competencies. Our proprietary FortiASICs,SPUs, which are the key to the performance of our appliances, are fabricatedbuilt by contract manufacturers inincluding Faraday Technology Corporation (“Faraday”), Kawasaki Microelectronics America, Inc. (“K-Micro”) and Renesas Electronics Corporation (“Renesas”). These contract manufacturers use foundries operated by either United Microelectronics Corporation (“UMC”) andor Taiwan Semiconductor Manufacturing Company Limited (“TSMC”). Faraday Technology Corporation (using UMC’s foundry), Kawasaki Microelectronics America, Inc. (“K-Micro”) (using TSMC’s foundry) and Renesas Electronics Corporation (“Renesas”) (using UMC’s foundry) manufacture our ASICs on a purchase order basis. Accordingly, they are not obligated to continue to fulfill our supply requirements, and the prices we are charged for the fabrication of our ASICs could be increased on short notice.or their own foundry, such as Renesas’ fab.

The components included in our products are sourced from various suppliers by us or more frequently by our contract manufacturers. Some of the components important to our business, including specific types of central processing unitsCPUs from Intel Corporation (“Intel”), network chips from Broadcom Corporation (“Broadcom”), Marvell Technology Group Ltd. (“Marvell”) and Intel, and solid-state drives (silicon-based storage device)devices) from Intel, ADATA Technology Co., Ltd. (“ADATA”), OCZ Technology Group, Inc. and(“OCZ”), Samsung Electronics Co., Ltd. (“Samsung”), and Western Digital Technologies, Inc. (“Western Digital”), are available from a limited or sole source of supply.

We have no long-term contracts related to the manufacturing of our ASICs or other components that guarantee any capacity or pricing terms.

Research and Development

We focus our research and development efforts on developing new products and systems, and adding new features to existing products and systems. Our development strategy is to identify features, products and systems for both software and hardware that are, or are expected to be, important to our end-customers. Our success in designing, developing, manufacturing and selling new or enhanced products will depend on a variety of factors, including the identification of market demand for new products, product selection, timely implementation of product design and development, product performance, effective manufacturing and assembly processes and sales and marketing.

Our research and development expense was $122.9 million in fiscal 2014, $102.7 million in fiscal 2013 and $81.1 million in fiscal 2012.

Intellectual Property

We rely primarily on patent, trademark, copyright and trade secrets laws, confidentiality procedures and contractual provisions to protect our technology. As of December 31, 20142016, we had 191358 issued United States (“U.S.”) and foreign patents and 156292 pending U.S.

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and foreign patent applications. We also license software from third parties for inclusion in our products, including open source software and other software available on commercially reasonable terms.

Despite our efforts to protect our rights in our technology, unauthorized parties may attempt to copy aspects of our products or obtain and use information that we regard as proprietary. We generally enter into confidentiality agreements with our employees, consultants, vendors and customers, and generally limit access to and distribution of our proprietary information. However, we cannot provide assurance that the steps we take will prevent misappropriation of our technology. In addition, the laws of some foreign countries do not protect our proprietary rights to as great an extent as the laws of the United States,U.S., and many foreign countries do not enforce these laws as diligently as government agencies and private parties in the United States.U.S.

Our industry is characterized by the existence of a large number of patents and frequent claims and related litigation regarding patent and other intellectual property rights. Third parties have asserted, are currently asserting and may in the future assert patent, copyright, trademark or other intellectual property rights against us, our channel partners or our end-customers. Successful claims of infringement by a third party could prevent us from distributing certain products or performing certain services or require us to pay substantial damages (including treble damages if we are found to have willfully infringed patents or copyrights), royalties or other fees. Even if third parties may offer a license to their technology, the terms of any offered license may not be acceptable and the failure to obtain a license or the costs associated with any license could cause our business, operating results or financial condition to be materially and adversely affected. We typically indemnify our end-customers, distributors and certain resellers against claims that our products infringe the intellectual property of third parties.



Seasonality

For information regarding seasonality in our sales, see the section entitled “—“Management’s Discussion and Analysis of Financial Condition and Results of Operations—Quarterly Results of Operations—Seasonality, Cyclicality and Quarterly Revenue Trends” in Part II, Item 7 of this Annual Report on Form 10-K.

Competition

The markets for our products are extremely competitive and are characterized by rapid technological change. The principal competitive factors in our markets include the following:
 
product performance, features, effectiveness, interoperability and reliability;
our ability to add and integrate new networking and security features and technological expertise;
compliance with industry standards and certifications;
price of products and services and total cost of ownership;
brand recognition;
customer service and support;
sales and distribution capabilities;
size and financial stability of operations; and
breadth of product line.

OurAmong others, our competitors include Cisco Systems, Inc. (“Cisco”), Juniper Networks, Inc. (“Juniper”), Check Point Software Technologies Ltd. (“Check Point”), Intel (through its acquisition of McAfee,Cisco Systems, Inc. (“McAfee”)Cisco”), F5 Networks, Inc. (“F5 Networks”), Dell Inc. (through its acquisition of SonicWALL, Inc. (“SonicWALL”) , BlueCoat Systems, Inc. (“BlueCoat”), FireEye, Inc. (“FireEye”) and, Intel, Juniper Networks, Inc. (“Juniper”), Palo Alto Networks, Inc. (“Palo Alto Networks”), amongst others.SonicWALL, Inc. (“SonicWALL”), Sophos Group Plc (“Sophos”) and Symantec Corporation (“Symantec”).

We believe we compete favorably based on our products’ performance, reliability and breadth, our ability to add and integrate new networking and security features and our technological expertise. Several competitors are significantly larger, have greater financial, technical, marketing, distribution, customer support and other resources, are more established than we are and have significantly better brand recognition. Some of these larger competitors have substantially broader product offerings and leverage their relationships based on other products or incorporate functionality into existing products in a manner that discourages users from purchasing our products. Based in part on these competitive pressures, we may lower prices or attempt to add incremental features and functionality.

Conditions in our markets could change rapidly and significantly as a result of technological advancements or continuing market consolidation. The development and market acceptance of alternative technologies could decrease the demand for our products or render them obsolete. Our competitors may introduce products that are less costly, provide superior performance, market their products better, or achieve greater market acceptance than us. In addition, our larger competitors often have broader product lines and are in a better position to withstand any significant reduction in capital spending by end-customers in these markets,

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and will therefore not be as susceptible to downturns in a particular market. The above competitive pressures are likely to continue to impact our business. We may not be able to compete successfully in the future, and competition may harm our business.

Employees

As of December 31, 20142016, our total headcount was 2,854 full-time equivalent employees.4,665 employees and contractors. None of our U.S. employees are represented by a labor union; however, our employees in Belgium, Finland, France, Italy, and Spain arecertain European countries have the right to be represented by collective bargaining agreements.external labor organizations if they maintain up-to-date union membership. We have not experienced any work stoppages, and we consider our relations with our employees to be good.

Available Information

Our web site is located at www.fortinet.com, and our investor relations web site is located at http://investor.fortinet.com. The information posted on our website is not incorporated by reference into this Annual Report on Form 10-K. Our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and amendments to reports filed or furnished pursuant to Sections 13(a) and 15(d) of the Securities Act, are available free of charge on our investor relations web site as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. You may also access all of our public filings through the SEC’s website at www.sec.gov. Further, a copy of this Annual Report on Form 10-K is located at the

SEC’s Public Reference Room at 100 F Street, NE, Washington, D.C. 20549. Information on the operation of the Public Reference Room can be obtained by calling the SEC at 1-800-SEC-0330.

We webcast our earnings calls and certain events we participate in or host with members of the investment community on our investor relations web site. 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 web site. The contents of these web sites are not intended to be incorporated by reference into this report or in any other report or document we file.


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ITEM 1A.     Risk Factors

Investing in our common stock involves a high degree of risk. Investors should carefully consider the following risks and all other information contained in this Annual Report on Form 10-K, including our consolidated financial statements and the related notes, before investing in our common stock. The risks and uncertainties described below are not the only ones we face. Additional risks and uncertainties that we are unaware of, or that we currently believe are not material, also may become important factors that affect us. If any of the following risks materialize, our business, financial condition and results of operations could be materially harmed. In that case, the trading price of our common stock could decline substantially, and investors may lose some or all of their investment.

Risks Related to Our Business

Our quarterly operating results are likely to vary significantly and be unpredictable.
 
Our operating results have historically varied from period to period, and we expect that they will continue to do so as a result of a number of factors, many of which are outside of our control andor may be difficult to predict, including:
 
the level of demand for our products and services, which may render forecasts inaccurate;
 
the timing of channel partner and end-customer orders and our reliance on a concentration of shipments at the end of each quarter;
 
��the timing of shipments, which may depend on many factors such as inventory levels, logistics, shipping delays at ports or otherwise, our ability to ship new products on schedule and to accurately forecast inventory requirements, and potential delays in the manufacturing process;
the timing of shipments, which may depend on many factors such as inventory levels, logistics, shipping delays, our ability to ship new products on schedule and to accurately forecast inventory requirements, and potential delays in the manufacturing process;

inventory imbalances, such as those related to new products and the end of life of existing products;management;
 
the mix of products sold, the mix of revenue between products and services and the degree to which products and services are bundled and sold together for a package price;

the purchasing practices and budgeting cycles and purchasing practices of our channel partners and end-customers;
 
the effectiveness of our sales organization, generally or in a particular geographic region, and the time it takes for our sales personnel to reach productivity;

seasonal buying patterns of our end-customers;

the timing and level of our investments in sales and marketing;marketing, and the impact of such investments on our operating expenses and operating margin, and on the productivity and effectiveness of execution of our sales and marketing teams;
 
the timing of revenue recognition for our sales, which may be affected by both the mix of sales by our “sell-in” versus our “sell-through” channel partners, and the accuracy and timing of point of salepoint-of-sale reporting by our “sell-through” channel partners, which impacts our ability to recognize revenue;
 
the level of perceived threats to network security, which may fluctuate from period to period;
 
changes in end-customer, distributor or resellerthe requirements, or market needs andor buying practices and patterns;patterns of our distributors, resellers or end-customers;
 
changes in the growth rate of the network security markets;
 
the timing and success of new product and service introductions by us or our competitors, or any other change in the competitive landscape of our industry, including consolidation among our competitors, partners, or end-customers;
 
the deferral of orders from distributors, resellers or end-customers in anticipation of new products or product enhancements announced by us or our competitors;

 
increases or decreases in our billings, revenue and expenses caused by fluctuations in foreign currency exchange rates or a strengthening of the U.S. dollar, as a significant portion of our expenses areis incurred and paid in currencies other than the U.S. dollar;dollar, and such fluctuations may impact the actual prices that our partners and customers are willing to pay for our products and services;

compliance with existing laws and regulations that are applicable to our ability to conduct business with the public sector;

the impact of cloud-based platforms on the timing of our revenue recognition, billings and free cash flow;
 

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decisions by potential end-customers to purchase network security solutions from newer technology providers, from larger, more established security vendors or from their primary network equipment vendors;
 
price competition and increased competitiveness in general in our market;
 
changes in customer renewal rates for our services;
 
changes in the payment terms of services contracts or the length of services contracts sold;

changes in our estimated annual effective tax rates;

changes in circumstances and challenges in business conditions, including decreased demand, which may negatively impact our channel partners’ ability to sell the current inventory they hold and negatively impact their future purchases of products from us;

increased demand for cloud-based services and the uncertainty associated with transitioning to providing such services;

increased expenses, unforeseen liabilities or write-downs and any impact on results of operations from any acquisition consummated;
 
our channel partners may havehaving insufficient financial resources and may not be able to withstand changes and challenges in business conditions;
 
disruptions in our channel or termination of our relationship with important channel partners;
 
insolvency, credit or other difficulties confronting our key suppliers orand channel partners, affectingwhich could affect their ability to purchase or pay for our products and services and which could disrupt our supply or distribution chain;

policy changes enacted and uncertainty with respect to immigration laws, trade policy, foreign imports and tax laws related to international commerce;

political, economic and social instability;

general economic conditions, both in our domestic and foreign markets; and

future accounting pronouncements or changes in our accounting policies.policies, such as changes in the revenue recognition standards or accounting for leases, as well as the significant costs that may be incurred to adopt and comply with these new pronouncements;

possible impairments or acceleration of depreciation of our existing real estate due to our future expansion plans; and

legislative or regulatory changes, such as with respect to privacy, information and cybersecurity, exports, the environment and applicable accounting standards.


Any one of the factors above or the cumulative effect of some of the factors referred to above may result in significant fluctuations in our quarterly financial and other operating results. This variability and unpredictability could result in our failing to meet our internal operating plan or the expectations of securities analysts or investors for any period. If we fail to meet or exceed such expectations for these or any other reasons, the market price of our shares could fall substantially and we could
face costly lawsuits, including securities class action suits. In addition, a significant percentage of our operating expenses are fixed in nature and based on forecasted revenue trends.over the near term. Accordingly, in the event of revenue shortfalls, we are generally unable to mitigate the negative impact on margins in the short term.

Adverse economic conditions or reduced information technology spending may adversely impact our business.
 
Our business depends on the overall demand for information technology and on the economic health of our current and prospective customers. In addition, the purchase of our products is often discretionary and may involve a significant commitment of capital and other resources. Weak global economic conditions and spending environments, weak economic conditions in certain geographies, or a reduction in information technology spending regardless of macro-economic conditions, could adversely impact our business, financial condition and results of operations in a number of ways, including longer sales cycles, lower prices for our products and services, higher default rates among our channel partners, reduced unit sales and slower or declining growth.

Our billings, revenue and revenuefree cash flow growth may slow or may not continue.
 
Billings, revenue and revenuefree cash flow growth may slow, or we may experience a decrease in billings, revenue and revenue,free cash flow for a number of reasons, including a slowdown in demand for our products or services, a shift in demand from products to services, increased competition, a decrease in the growth of our overall market or softness in demand in certain geographies or industry verticals, such as the service provider industry, or if we failand our failure for any reason to continue to capitalize on growth opportunities.opportunities and due to other risks identified in the risk factors described in this periodic report. Our expenses as a percentage of total revenue may be higher than expected if our revenue is lower than expected and, if our investments in sales and marketing and other functional areas do not result in expected billings and revenue growth, we may experience margin declines and we may not be able to sustain profitability in future periods if we fail to increase billings, revenue or deferred revenue, do not appropriately manage our cost structure and free cash flow or encounter unanticipated liabilities. Any failure by us to maintain profitability, maintain our margins and continue our billings, revenue and revenuefree cash flow growth could cause the price of our common stock to materially decline.


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We rely significantly on revenue from FortiGuard security subscription and FortiCare technical support services which may decline, and because we recognize revenue from FortiGuard security subscription and FortiCare technical support services over the term of the relevant service period, downturns or upturns in sales of FortiGuard security subscription and FortiCare technical support services are not immediately reflected in full in our operating results.

Our FortiGuard security subscription and FortiCare technical support services revenue has historically accounted for a significant percentage of our total revenue. SalesRevenue from the sale of new, or renewalsfrom the renewal of existing, FortiGuard security subscription and FortiCare technical support services contracts may decline and fluctuate as a result of a number of factors, including fluctuations in purchases of FortiGate appliances, changes in the sales mix between products and services, end-customers’ level of satisfaction with our products and services, the prices of our products and services, the prices of products and services offered by our competitors, or reductions in our customers’ spending levels.levels and the timing of revenue recognition with respect to these arrangements. If our sales of new, or renewals of existing FortiGuard security subscription and FortiCare technical support services contracts decline, our revenue and revenue growth may decline and our business willcould suffer. In addition, in the event significant customers require payment terms for FortiGuard security subscription or FortiCare technical support services in arrears or for shorter periods of time than annually, such as monthly or quarterly, this may negatively impact our billings and revenue. Furthermore, we recognize FortiGuard security subscription and FortiCare technical support services revenue monthly over the term of the relevant service period, which is typically from one to three years, butand in some instances has been as long as five years. As a result, much of the FortiGuard security subscription and FortiCare technical support services revenue we report each quarter is the recognition of deferred revenue from FortiGuard security subscription and FortiCare technical support services contracts entered into during previous quarters.quarters or years. Consequently, a decline in new or renewed FortiGuard security subscription or FortiCare technical support services contracts in any one quarter will not be fully reflected in revenue in that quarter but will negatively affect our revenue in future quarters. Accordingly, the effect of significant downturns in sales of new, or renewals of existing, FortiGuard security subscriptionssubscription or FortiCare technical support services is not reflected in full in our statements of operations until future periods. Our FortiGuard security subscription and FortiCare technical support services revenue also makes it difficult for us to rapidly increase our revenue through additional service sales in any period, as revenue from new and renewal support services contracts must be recognized over the applicable service period.

 
We generate a majority of revenue from sales to distributors, resellers and end-customers outside of the United States,U.S., and we are therefore subject to a number of risks associated with international sales and operations.
 
We market and sell our products throughout the world and have established sales offices in many parts of the world. Our international sales have represented a majority of our total revenue in recent periods. Therefore, we are subject to risks associated with having worldwide operations. We are also subject to a number of risks typically associated with international sales and operations, including:
 
economic or political instability in foreign markets;
 
greater difficulty in enforcing contracts, accounts receivable collection and longer collection periods;
 
changes in regulatory requirements;
 
difficulties and costs of staffing and managing foreign operations;
 
the uncertainty of protection for intellectual property rights in some countries;
 
costs of compliance with foreign policies, laws and regulations and the risks and costs of non-compliance with such policies, laws and regulations;

protectionist policies and penalties, and local laws, requirements, policies and requirementsperceptions that may be adversely impact U.S. headquartered business’sbusiness’ sales in certain countries outside of the United States;U.S.;
 
costs of complying with U.S. or other foreign laws and regulations for foreign operations, including the U.S. Foreign Corrupt Practices Act, the U.K.United Kingdom (“UK”) Bribery Act 2010, import and export control laws, tariffs, trade barriers and economic sanctions;
 
other regulatory or contractual limitations on our ability to sell our products in certain foreign markets, and the risks and costs of non-compliance;

heightened risks of unfair or corrupt business practices in certain geographies and of improper or fraudulent sales or sales-related arrangements that could disrupt the sales team through terminations of employment or

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otherwise, and may adversely impact financial results as compared to those already reported or forecasted and result in restatements of financial statements and irregularities in financial statements;

our ability to effectively implement and maintain adequate internal controls to properly manage our international sales and operations;

the potential for political unrest, changes and uncertainty, and for terrorism, hostilities, war or natural disasters;

changes in foreign currency exchange rates;
 
management communication and integration problems resulting from cultural differences and geographic dispersion; and

multiplechanges in tax, employment and possibly overlapping tax structures.other laws.
 
Product and service sales and employee and contractor matters may be subject to foreign governmental regulations, which vary substantially from country to country. Further, we may be unable to keep up-to-date with changes in government requirements as they change over time. Failure to comply with these regulations could result in adverse effects to our business. In many foreign countries, it is common for others to engage in business practices that are prohibited by our internal policies and procedures or U.S. regulations applicable to us. Although we implemented policies and procedures designed to ensure compliance with these laws and policies, there can be no assurance that all of our employees, contractors, channel partners and agents will comply with these laws and policies. Violations of laws or key control policies by our employees, contractors, channel partners or agents could result in litigation, regulatory action, costs of investigation, delays in revenue recognition, delays in financial reporting, financial reporting misstatements, fines, penalties, or the prohibition of the importation or

exportation of our products and services, any of which could have a material adverse effect on our business and results of operations.

If we are not successful in continuing to execute our strategy to increase our sales to largerlarge and medium-sized end-customers, our results of operations may suffer.
 
An important part of our growth strategy is to increase sales of our products to large enterprises and medium-sized businesses, service providers and government organizations. While we have experienced some success sellingincreased sales in recent periods to large and medium-sized enterprises and service providers, and enterprises, weour sales volume varies by quarter. We also have experienced less traction selling to certain government organizations and there can be no assurance that we will be successful selling to these customer segments.customers. Sales to enterprises, service providers and governmentthese organizations involve risks that may not be present, (oror that are present to a lesser extent)extent, with sales to small-to-mid-sizedsmaller entities. These risks include:
 
increased competition from competitors that traditionally target large enterprises and medium-sized businesses, service providers and government organizations and that may already have purchase commitments from those end-customers;
 
increased purchasing power and leverage held by large end-customers in negotiating contractual arrangements;

unanticipated changes in the capital resources of or purchasing behavior of large end-customers, including changes in the volume and frequency of their purchases;purchases and changes in the mix of products and services and related payment terms;
 
more stringent support requirements in our support service contracts, including stricter support response times, more complex requirements and increased penalties for any failure to meet support requirements; and

longer sales cycles and the associated risk that substantial time and resources may be spent on a potential end-customer that elects not to purchase our products and services.services; and

longer ramp-up periods for enterprise sales personnel as compared to other sales personnel.
 
Large enterprises and medium-sized businesses, service providers and government organizations often undertake a significant evaluation process that results in a lengthy sales cycle, in some cases overlonger than 12 months. Although we have a channel sales model, our sales representatives typically engage in direct interaction with end-customers, along with our distributors and resellers, in connection with sales to largerlarge and medium-sized end-customers. Due to the lengthy nature, the size and scope, and stringent requirements of these evaluations, we typically provide evaluation products to these customers. We may spend substantial time, effort and money in our sales efforts without being successful in producing any sales. If we are unsuccessful in converting these evaluations into sales, we may experience an increased inventory of used products and potentially increased write-offs. In addition, product purchases by large enterprises and medium-sized businesses, service providers and government organizations are frequently subject to budget constraints, multiple approvals and unplanned administrative, processing and other delays. Furthermore, service providers represent our largest industry vertical and consolidation or changes in buying behavior by larger customers within this industry could negatively impact our business. Enterprises,Large enterprises and medium-sized businesses, service providers and government organizations typically have longer

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implementation cycles, require greater product functionality and scalability, andexpect a broader range of services, including design services, demand that vendors take on a larger share of risks, sometimes require acceptance provisions that can lead to a delay in revenue recognition, and expect greater payment flexibility from vendors. In addition, large enterprises and medium-sized businesses, service providers and government organizations may require that our products and services be sold differently from how we offer our products and services, which could negatively impact our operating results. Our large enterprise and service provider customers may also become more deliberate in their purchases as they plan their next-generation network security architecture, leading them to take more time in making purchasing decisions or to purchase based only on their immediate needs. All these factors can add further risk to business conducted with these customers. IfIn addition, if sales expected from a large and medium-sized end-customer for a particular quarter are not realized in that quarter or at all, our business, operating results and financial condition could be materially and adversely affected.

Managing inventory of our products and product components is complex. Insufficient inventory may result in lost sales opportunities or delayed revenue, while excess inventory may harm our gross margins.

Managing our inventory is complex. Our channel partners may increase orders during periods of product shortages, cancel orders or not place orders commensurate with our expectations if their inventory is too high, return products or take advantage of price protection (if any is available to the particular partner), or delay orders in anticipation of new products. Theyproducts, and accurately forecasting inventory requirements and demand can be challenging. Our channel partners also may adjust their

orders in response to the supply of our products and the products of our competitors that are available to them and in response to seasonal fluctuations in end-customer demand. Furthermore, if the time required to manufacture certain products or ship certain products increases for any reason, thisinventory shortfalls could result in inventory shortfalls.result. Management of our inventory is further complicated by the significant number of different products and models that we sell.
 
In addition, for those channel partners that have rights of return, inventory held by such channel partners affects our results of operations. Our inventory management systems and related supply chain visibility tools may be inadequate to enable us to effectively manage inventory. Inventory management remains an area of focus as we balance the need to maintain inventory levels that are sufficient to ensure competitive lead times against the risk of inventory obsolescence because of rapidly changing technology and customer requirements.requirements, or excess inventory levels. If we ultimately determine that we have excess inventory, we may have to reduce our prices and write-down inventory, which in turn could result in lower gross margins. Alternatively, insufficient inventory levels may lead to shortages that result in delayed revenue or loss of sales opportunities altogether as potential end-customers turn to competitors’ products that are readily available. For example, we have in the past experienced inventory shortages and excesses due to morethe variance in demand for certain products than we had forecasted.from forecasted amounts. If we are unable to effectively manage our inventory and that of our channel partners, our results of operations could be adversely affected.

We are dependent on the continued services and performance of our senior management, the loss of any of whom could adversely affect our business, operating results and financial condition.
 
Our future performance depends on the continued services and continuing contributions of our senior management to execute on our business plan, and to identify and pursue new opportunities and product innovations. The loss of services of members of senior management, particularly Ken Xie, our Co-founderCo-Founder, Chairman and Chief Executive Officer, and Michael Xie, our Co-founder,Co-Founder, President and Chief Technology Officer, and any of our senior sales leaders or functional area leaders, could significantly delay or prevent the achievement of our development and strategic objectives. The loss of the services, or distraction, of our senior management for any reason could adversely affect our business, financial condition and results of operations.

If we are unable to hire, retain and motivate qualified personnel, our business will suffer.
 
Our future success depends, in part, on our ability to continue to attract and retain highly skilled personnel. The loss of the services of any of our key personnel, the inability to attract or retain qualified personnel, or delays in hiring required personnel, particularly in engineering, sales and sales,marketing, may seriously harm our business, financial condition and results of operations. From time to time, we experience turnover in our management-level personnel. None of our key employees has an employment agreement for a specific term, and any of our employees may terminate their employment at any time. Our ability to continue to attract and retain highly skilled personnel will be critical to our future success. Competition for highly-skilled personnel is frequently intense, especially for qualified employees in network security and especially in the locations where we have a substantial presence and need for highly-skilled personnel, such as the San Francisco Bay Area and Vancouver, Canada. We may not be successful in attracting, assimilating or retaining qualified personnel to fulfill our current or future needs. Also, to the extent we hire personnel from competitors, we may be subject to allegations that they have been improperly solicited or divulged proprietary or other confidential information. Changes in immigration laws, including changes to the rules regarding H1-B visas, may also harm our ability to attract personnel from other countries.

If we do not increase the effectiveness of our sales organization in some regions, we may have difficulty adding new end-customers or increasing sales to our existing end-customers and our business may be adversely affected.

Although we have a channel sales model, members of our sales organization often engage in direct interaction with our prospective end-customers. Therefore, we continue to be substantially dependent on our sales organization to obtain new end-customers and sell additional products and services to our existing end-customers. There is significant competition for sales personnel with the skills and technical knowledge that we require. Our ability to grow our revenue depends, in large part, on our success in recruiting, training and retaining sufficient numbers of sales personnel to support our growth and on the effectiveness of those personnel. New hires require substantial training and may take significant time before they achieve full productivity. Our recent hires and planned hires may not become productive as quickly as we expect, and we may be unable to hire or retain sufficient numbers of qualified individuals in the markets where we do business or plan to do business. For example, we realigned our sales organization in early 2016 and it has taken more time than we expected to ramp up the productivity of our realigned sales organization, which negatively impacted our revenue growth in the third quarter of 2016 in some regions. Furthermore, hiring sales personnel in new countries requires additional setup and upfront costs that we may not recover if the sales personnel fail to achieve full productivity. If our new sales employees do not become fully productive on the timelines that we have projected, our revenue will not increase at anticipated levels and our ability to achieve long term

projections may be negatively impacted. If we are unable to hire and train sufficient numbers of effective sales personnel, or the sales personnel are not successful in obtaining new end-customers or increasing sales to our existing customer base, our business, operating results and prospects will be adversely affected.

The average sales prices of our products and services may decrease, which may reduce our gross profits and adversely impact our financial results and the trading price of our common stock.
 
The average sales prices for our products and services may decline for a variety of reasons, including competitive pricing pressures, discounts or promotional programs we offer, a change in our mix of products and services and anticipation of the introduction of new products or promotional programs.and services. Competition continues to increase in the market segments in which we participate, and we expect competition to further increase in the future, thereby leading to increased pricing pressures. Larger competitors with more diverse product offerings

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may reduce the price of products and services that compete with ours in order to promote the sale of other products or services or may bundle them with other products.products or services. Additionally, although we price our products and services worldwide in U.S. dollars, currency fluctuations in certain countries and regions have in the past, and may in the future, negatively impact actual prices that partners and customers are willing to pay in those countries and regions. Furthermore, we anticipate that the average sales prices and gross profits for our products or services will decrease over product life cycles. We cannot assure youensure that we will be successful in developing and introducing new offerings with enhanced functionality on a timely basis, or that our product and service offerings, if introduced, will enable us to maintain our prices and gross profits at levels that will allow us to maintain profitability.
 
Reliance on a concentration of shipments at the end of the quarter could cause our billings and revenue to fall below expected levels.
 
As a result of customer-buying patterns and the efforts of our sales force and channel partners to meet or exceed quarterly quotas, we have historically received a substantial portion of each quarter’s sales orders and generated a substantial portion of each quarter’s billings and revenue during the last two weeks of the quarter. For example, in 2016, the portion of billings during the last two weeks of the quarter was 37%, and,on average over the past eight quarters, our shipmentsbillings during the last two weeks of each quarter accounted for approximately 33%35% of aggregate billings for each quarter. If expected orders at the end of any quarter are delayed for any reason, including the failure of anticipated purchase orders to materialize, our logistics partners’ inability to ship products prior to quarter-end to fulfill purchase orders received near the end of the quarter, our failure to accurately forecast our inventory requirements and to appropriately manage inventory to meet demand, our inability to release new products on schedule, any failure of our systems related to order review and processing, any delays in shipments based ondue to trade compliance requirements, or any shipment delays based on labor disputes or logistics changes at shipping ports or otherwise, our billings and revenue for that quarter could fall below our expectations or those of securities analysts and investors, resulting in a decline in our stock price.

Unless we continue to develop better market awareness of our company and our products, and to improve lead generation and sales enablement, our revenue may not continue to grow.

Increased market awareness of our capabilities and products and increased lead generation are essential to our continued growth and our success in all of our markets, particularly for the large enterprise, service provider and government organization market. We have historically had relatively low spending on certain marketing activities. While we have recently been increasingincreased our investments in sales and marketing, it is not clear that these investments will continue to result in increased revenues.revenue. If our investments in additional sales personnel or if our marketing programs are not successful in continuing to create market awareness of our company and products and increased lead generation, or if we experience turnover and disruption in our sales and marketing teams, we will not be able to achieve sustained growth, and our business, financial condition and results of operations will be adversely affected, and we will not be able to achieve sustained growth.affected.

We rely on third-party channel partners to generate substantially all of our revenue. If our partners fail to perform, our ability to sell our products and services will be limited, and if we fail to optimize our channel partner model going forward, our operating results will be harmed.
 
SubstantiallyA significant portion of our sales is generated through a limited number of distributors, and substantially all of our revenue is generated through sales by our channel partners, which includeincluding distributors and resellers. We depend upon our channel partners to generate a significant portion of our sales opportunities and manage the sales process. To the extent our channel partners are unsuccessful in selling our products, or we are unable to enter into arrangements with and retain a sufficient number of high qualityhigh-quality channel partners in each of the regions in which we sell products, and if we are unable to keep them motivated to sell our products, our ability to sell our products and operating results will be harmed. The termination of our relationship with any significant channel partner may adversely impact our sales and operating results.

We provide sales channel partners with specific programs to assist them in selling our products and incentivize them to sell our products, but there can be no assurance that these programs will be effective. In addition, our channel partners may be unsuccessful in marketing, selling and supporting our products and services and may purchase more inventory than they can sell. Our channel partners generally do not have minimum purchase requirements. Some of our channel partners may have insufficient financial resources to withstand changes and challenges in business conditions. In addition, if our channel partners’ financial condition or operations weaken it could negatively impact their ability to sell our product and services. TheyOur channel partners may also market, sell and support products and services that are competitive with ours, and may devote more resources to the marketing, sales and support of such products. They may also have incentives to promote our competitors’ products to the detriment of our own. Theyown, or they may cease selling our products altogether. We cannot assure youensure that we will retain these channel partners or that we will be able to secure additional or replacement partners or that existing channel partners will continue to perform. The loss of one or more of our significant channel partners or the failure to obtain and ship a number of large orders each quarter through them could harm our operating results. During fiscal 2014, fiscal 2013,2015 and fiscal 2012,2016, Exclusive, Networks Group, which distributed our solutions to a large group of resellers and end-customers, accounted for 15%, 12%,18% and 11%20% of our total revenue, respectively. In addition, any new sales channel partner will require extensive training and may take several months or more to achieve productivity. Our channel partner sales structure could subject us to lawsuits, potential liability and

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reputational harm if, for example, any of our channel partners misrepresent the functionality of our products or services to end-customers or our channel partners violate laws or our corporate policies. We depend on our global channel partners to comply with applicable legal and regulatory requirements. To the extent that they fail to do so, that could have a material adverse effect on our business, operating results and financial condition. If we fail to optimize our channel partner model or fail to manage existing sales channels, our business will be seriously harmed.

Actual, possible or perceived defects or vulnerabilities in our products or services, the failure of our products or services to prevent a virus or security breach, or misuse of our products could harm our reputation and divert resources.
 
Because our products and services are complex, they have contained and may contain defects or errors that are not detected until after their commercial release and deployment by our customers. Defects or vulnerabilities may impede or block network traffic, or cause our products or services to be vulnerable to electronic break-ins or cause them to fail to help secure networks. Different customers deploy and use our products in different ways, and certain deployments and usages may subject our products to adverse conditions that may negatively impact the effectiveness and useful lifetime of our products. We cannot ensure that our products will prevent all security threats. Because the techniques used by computer hackers to access or sabotage networks change frequently and generally are not recognized until launched against a target, we may be unable to anticipate these techniques. In addition, defects or errors in our FortiGuard security subscription updates or our FortiGate appliances could result in a failure of our FortiGuard security subscription services to effectively update end-customers’ FortiGate appliances and thereby leave customers vulnerable to attacks. Furthermore, our solutions may also fail to detect or prevent viruses, worms or similar threats due to a number of reasons such as the evolving nature of such threats and the continual emergence of new threats that we may fail to add to our FortiGuard databases in time to protect our end-customers’ networks. Our FortiGuard or FortiCare data centers and networks may also experience technical failures and downtime, and may fail to distribute appropriate updates, or fail to meet the increased requirements of our customer base. Any such technical failure, downtime or failures in general may temporarily or permanently expose our end-customers’ networks, leaving their networks unprotected against the latest security threats.
 
An actual, possible or perceived security breach or infection of the network of one of our end-customers, regardless of whether the breach is attributable to the failure of our products or services to prevent the security breach, could adversely affect the market’s perception of our security products and services and, in some instances, subject us to potential liability that is not contractually limited. We may not be able to correct any security flaws or vulnerabilities promptly, or at all. Our products may also be misused by end-customers or third parties who obtain access to our products. For example, our products could be used to censor private access to certain information on the Internet. Such use of our products for censorship could result in negative press coverage and negatively affect our reputation, even if we take reasonable measures to prevent any improper shipment of our products or if our products are provided by an unauthorized third-party. Any actual, possible or perceived defects, errors or vulnerabilities in our products, or misuse of our products, could result in:
 
expenditure of significant financial and product development resources in efforts to analyze, correct, eliminate or work-aroundwork around errors or defects or to address and eliminate vulnerabilities;
 
loss of existing or potential end-customers or channel partners;
 
delayed or lost revenue;
 

delay or failure to attain market acceptance;
 
negative publicity which willand harm to our reputation; and
 
litigation, regulatory inquiries or investigations that may be costly and harm our reputation and, in some instances, subject us to potential liability that is not contractually limited.
 
Our business and operations have experienced growth, and if we do not appropriately manage any future growth, including through the expansion of our real estate holdings, or are unable to improve our systems and processes, our operating results will be negatively affected.
 
Our business has grown over the last several years. We rely heavily on information technology and accounting systems to help manage critical functions such as order processing, revenue recognition, financial forecasts, inventory and supply chain management and trade compliance reviews. Certain of these systems were developed by us for our internal use and as such may have a higher risk of failure or not receive the same level of support as systems purchased from and supported by external technology companies. In addition, we have been slow to adopt and implement certain automated functions, which could have a negative impact on our business. For example, a large part of our order processing relies on the manual processing of emails internally and receiptdata entry of customer purchase orders received through email and, to a lesser extent, through electronic data interchange

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from our customers. Combined with the fact that we may receive a majoritylarge amount of our orders in the last few weeks of any given quarter, a significant interruption in our email service or other systems could result in delayed order fulfillment and decreased billings and revenue for that quarter.

To manage any future growth effectively, we must continue to improve and expand our information technology and financial, infrastructure, operating and administrative systems and controls, and continue to manage headcount, capital and processes in an efficient manner. We may not be able to successfully implement requisite improvements to these systems, controls and processes, such as system capacity, access and change management controls, in a timely or efficient manner. We purchased a new enterprise resource planning system during the second quarter of fiscal 2014. We are in the early stages of implementing the new system and, as a result, we have incurred and will continue to incur additional costs in connection with implementing the system. In addition, we may experience some disruption during the system implementation process. Our failure to improve our systems and processes, or their failure to operate in the intended manner, whether as a result of the significant growth of our business or otherwise, may result in our inability to manage the growth of our business and to accurately forecast our revenue, expenses and earnings, or to prevent certain losses. Moreover, the failure of our systems and processes could undermine our ability to provide accurate, timely and reliable reports on our financial and operating results and could impact the effectiveness of our internal control over financial reporting. In addition, our systems and processes may not prevent or detect all errors, omissions or fraud. Our productivity and the quality of our products and services may also be adversely affected if we do not integrate and train our new employees quickly and effectively. Any future growth would add complexity to our organization and require effective coordination throughout our organization. Failure to manage any future growth effectively could result in increased costs and harm our results of operations.

Further, it may be necessary to expand our real estate holdings to meet our projected growing need for office space. We recently approved plans to purchase office buildings in Vancouver and Ottawa, Canada, and we are considering plans to significantly expand our headquarters in Sunnyvale, California. These plans will require significant capital expenditure over the next several years and involve certain risks, including impairment charges and acceleration of depreciation, changes in future business strategy that may decrease the need for expansion (such as a decrease in headcount) and, with respect to our potential expansion plans in California, risks related to construction. Future changes in growth or fluctuations in cash flow may also negatively impact our ability to pay for these projects. Additionally, inaccuracies in our projected capital expenditures could negatively impact our business, operating results and financial condition.
We may experience difficulties maintaining and expanding our new enterprise resource planning (“ERP”) system.
We recently implemented a new ERP system. The ERP system is critical to our ability to provide important information to our management, obtain and deliver products, provide services and customer support, send invoices and track payments, fulfill contractual obligations, accurately maintain books and records, provide accurate, timely and reliable reports on our financial and operating resultsand otherwise operate our business. ERP system implementations also require transformation of business and financial processes in order to reap the benefits of the ERP system; any such transformation involves risks inherent in the conversion to a new computer system, including potential disruption to our normal operations. The implementation and maintenance of the new ERP system has required, and will continue to require, the investment of significant financial and human resources. In addition, we may choose to upgrade or expand the functionality of our ERP system, leading to additional costs. We may also discover deficiencies in our design or implementation or maintenance of the new ERP system that could adversely affect our ability to process orders, ship products, provide services and customer support, send invoices and track payments, fulfill contractual obligations, accurately maintain books and records, provide accurate,

timely and reliable reports on our financial and operating results, or otherwise operate our business. Additionally, if the system does not operate as intended, the effectiveness of our internal control over financial reporting could be adversely affected or our ability to assess it adequately could be delayed.

If our estimates or judgments relating to our critical accounting policies are based on assumptions that change or prove to be incorrect, our operating results could fall below expectations of securities analysts and investors, resulting in a decline in our stock price.
 
The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances, as provided in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in this Annual Report on Form 10-K, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Our operating results may be adversely affected if our assumptions change or if actual circumstances differ from those in our assumptions, which could cause our operating results to fall below the expectations of securities analysts and investors, resulting in a decline in our stock price. Significant assumptions and estimates used in preparing our consolidated financial statements include those related to revenue recognition and sales return reserves, stock-based compensation expense, valuation of inventory, warranty liabilities,investments, accounting for business combination, goodwill and other long-lived assets, investments,restructuring, accounting for income taxes, and litigation and settlement costs and other loss contingencies, sales returns and allowances, reserve for bad debt, and the accounting for business combinations.costs.

We offer retroactive price protection to certain of our major distributors, and if we fail to balance their inventory with end-customer demand for our products, our allowance for price protection may be inadequate, which could adversely affect our results of operations.

We provide certain of our major distributors with price protection rights for inventories of our products held by them. If we reduce the list price of our products, certain distributors receive refunds or credits from us that reduce the price of such products held in their inventory based upon the new list price. Future credits for price protection will depend on the percentage of our price reductions for the products in inventory and our ability to manage the levels of our major distributors’ inventories. If future price protection adjustments are higher than expected, our future results of operations could be materially and adversely affected.
 
Because we depend on several third-party manufacturers to build our products, we are susceptible to manufacturing delays that could prevent us from shipping customer orders on time, if at all, and may result in the loss of sales and customers, and third-party manufacturing cost increases could result in lower gross margins.

We outsource the manufacturing of our security appliance products to a variety of contract manufacturing partners and original design manufacturing partners.
partners including Faraday, K-Micro and Renesas. Our reliance on our third-party manufacturers in Asia and elsewhere reduces our control over the manufacturing process, exposing us to risks, including reduced control over quality assurance and product costs, and product supply and timing. Any manufacturing disruption by our third-party manufacturers could impair our ability to fulfill orders. If we are unable to manage our relationships with these third-party manufacturers effectively, or if these third-party manufacturers experience delays, increased manufacturing lead-times, disruptions, capacity constraints or quality control problems in their manufacturing operations, or fail to meet our future requirements for timely delivery, our ability to ship products to our customers could be impaired and our business would be seriously harmed.
 

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These manufacturers fulfill our supply requirements on the basis of individual purchase orders. We have no long-term contracts or arrangements with certain of our third-party manufacturers that guarantee capacity, the continuation of particular payment terms or the extension of credit limits. Accordingly, they are not obligated to continue to fulfill our supply requirements, and the prices we are charged for manufacturing services could be increased on short notice. If we are required to change third-party manufacturers, our ability to meet our scheduled product deliveries to our customers would be adversely affected, which could cause the loss of sales and existing or potential customers, delayed revenue or an increase in our costs, which could adversely affect our gross margins. Our individual product lines are generally manufactured by only one manufacturing partner. Any production or shipping interruptions for any reason, such as a natural disaster, epidemic, capacity shortages, quality problems, or strike or other labor disruption at one of our manufacturing partners or locations or at shipping ports or locations, would severely affect sales of our product lines manufactured by that manufacturing partner. Furthermore, manufacturing cost increases for any reason could result in lower gross margins.
 
Our proprietary FortiASIC,SPU, which is the key to the performance of our appliances, is fabricated by contract manufacturers in foundries operated by UMC and TSMC. Faraday (using UMC’s foundry), K-Micro (using TSMC’s foundry) and Renesas (using UMC’s foundry) manufacture our ASICsTSMC on a purchase order basis, and UMC and TSMC do not guarantee any capacity and

could reject orders from Faraday, K-Micro or Renesas or could try to increase pricing. Accordingly, the foundries are not obligated to continue to fulfill our supply requirements, and due to the long lead time that a new foundry would require, we could suffer temporary or long term inventory shortages of our FortiASICSPU as well as increased costs. Our suppliers may also prioritize orders by other companies that order higher volumes ofor more profitable products. If any of these suppliersmanufacturers materially delays its supply of ASICs or specific product models to us, or requires us to find an alternate supplier and we are not able to do so on a timely and reasonable basis, or if these foundries materially increase their prices for fabrication of our ASICs, or specific product models, our business would be harmed.
 
In addition, our reliance on third-party manufacturers and foundries limits our control over environmental regulatory requirements such as the hazardous substance content of our products and therefore our ability to ensure compliance with the European Union’s (“EU”) Restriction of Hazardous Substances Directive (“RoHS”) adopted in the European Union (the “EU”) and other similar laws. It also exposes us to the risk that certain minerals and metals, known as “conflict minerals,” that are contained in our products have originated in the Democratic Republic of the Congo or an adjoining country. As a result of the passage of the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010 (“Dodd-Frank”), the SEC adopted new disclosure requirements for public companies whose products contain conflict minerals that are necessary to the functionality or production of such products. Under these rules, we are required to obtain sourcing data from suppliers, perform supply chain due diligence, and file annually with the SEC a specialized disclosure report on Form SD covering the prior calendar year. We have incurred and expect to incur additional costs to comply with the rules, including costs related to the determination of the origin, source and chain of custody of the conflict minerals used in our products and the adoption of conflict minerals-related governance policies, processes and controls.  Moreover, the implementation of these compliance measures could adversely affect the sourcing, availability and pricing of materials used in the manufacture of our products to the extent that there may be only a limited number of suppliers that are able to meet our sourcing requirements. There can be no assurance that we will be able to obtain such materials in sufficient quantities or at competitive prices. We may also encounter customers who require that all of the components of our products be certified as conflict free.conflict-free. If we are not able to meet customer requirements, such customers may choose to not purchase our products, which could impact our sales and the value of portions of our inventory.

Because some of the key components in our products come from limited sources of supply, we are susceptible to supply shortages, long lead times for components, and supply changes, each of which could disrupt or delay our scheduled product deliveries to our customers, result in inventory shortage, and may result in theor loss of sales and customers, and increasedor increase component costs may resultresulting in lower gross margins.
 
We and our contract manufacturers currently purchase several key parts and components used in the manufacture of our products from limited sources of supply. We are therefore subject to the risk of shortages and long lead times in the supply of these components and the risk that component suppliers discontinue or modify components used in our products. We have in the past experienced, and are currently experiencing, shortages and long lead times for certain components. Certain of our limited source components for particular appliances and suppliers of those components include: specific types of central processing unitsCPUs from Intel, Advanced Micro Devices, Inc., and RMI/Netlogic Corporation, network chips from Broadcom, Corporation, Marvell Technology Group Ltd. and Intel, and hard drivesmemory devices from Intel, ADATA, OCZ, Samsung and Western Digital Technologies, Inc.Digital. The introduction by component suppliers of new versions of their products, particularly if not anticipated by us or our contract manufacturers, could require us to expend significant resources to incorporate these new components into our products. In addition, if these suppliers were to discontinue production of a necessary part or component, we would be required to expend significant resources and time in locating and integrating replacement parts or components from another vendor. Qualifying additional suppliers for limited source parts or components can be time-consuming and expensive.
 

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Our manufacturing partners have experienced long lead times for the purchase of components incorporated into our products. Lead times for components may be adversely impacted by factors outside of our control, such as natural disasters and other factors. Our reliance on a limited number of suppliers involves several additional risks, including:

a potential inability to obtain an adequate supply of required parts or components when required;

financial or other difficulties faced by our suppliers;
 
infringement or misappropriation of our intellectual property;
 
price increases;
 
failure of a component to meet environmental or other regulatory requirements;
 
failure to meet delivery obligations in a timely fashion; and
 

failure in component quality.
 
The occurrence of any of these events would be disruptive to us and could seriously harm our business. Any interruption or delay in the supply of any of these parts or components, or the inability to obtain these parts or components from alternate sources at acceptable prices and within a reasonable amount of time, would harm our ability to meet our scheduled product deliveries to our distributors, resellers and end-customers. This could harm our relationships with our channel partners and end-customers and could cause delays in shipment of our products and adversely affect our results of operations. In addition, increased component costs could result in lower gross margins.

We are exposed to fluctuations in currency exchange rates, which could negatively affect our financial condition and results of operations.
 
A majoritysignificant portion of our operating expenses are incurred outside the United States.U.S. These expenses are denominated in foreign currencies and are subject to fluctuations due to changes in foreign currency exchange rates, particularly changes in the Euro and Canadian dollar. Althoughdollar and, to a lesser extent, the British Pound. Additionally, fluctuations in the exchange rate of the Canadian dollar may negatively impact our real estate purchase and development plans in Vancouver and Ottawa. While we are not currently engaged in material hedging activities, we have been hedging currency exposures relating to certain balance sheet accounts ifthrough the use of forward exchange contracts. If we stop hedging against any of these risks or if our attempts to hedge against these currency exposures are not successful, our financial condition and results of operations could be adversely affected. In addition, our sales contracts are primarily denominated in U.S. dollars and therefore, while substantially all of our revenue is not subject to foreign currency risk, it does not serve as a hedge to our foreign currency-denominated operating expenses. In addition, a strengthening of the U.S. dollar couldmay increase the real cost of our products to our customers outside of the United States,U.S., which couldmay also adversely affect our financial condition and results of operations. 

Failure to comply with laws and regulations applicable to our business could subject us to fines and penalties and could also cause us to lose end-customers in the public sector or negatively impact our ability to contract with the public sector.

Our business is subject to regulation by various federal, state, local and foreign governmental agencies, including agencies responsible for monitoring and enforcing employment and labor laws, workplace safety, product safety, product labelling, environmental laws, consumer protection laws, anti-bribery laws, import and export controls, federal securities laws and tax laws and regulations. In certain jurisdictions, these regulatory requirements may be more stringent than in the U.S. Noncompliance with applicable regulations or requirements could subject us to investigations, sanctions, enforcement actions, disgorgement of profits, fines, damages and civil and criminal penalties or injunctions. If any governmental sanctions are imposed, or if we do not prevail in any possible civil or criminal litigation, our business, operating results and financial condition could be adversely affected. In addition, responding to any action will likely result in a significant diversion of management’s attention and resources and an increase in professional fees. Enforcement actions and sanctions could harm our business, operating results and financial condition.

Selling our solutions to the U.S. government, whether directly or through channel partners, also subjects us to certain regulatory and contractual requirements. Failure to comply with these requirements by either us or our channel partners could subject us to investigations, fines, other penalties and damages, which could have an adverse effect on our business, operating results, financial condition and prospects. As an example, the U.S. Department of Justice (“DOJ”), on its own behalf or on behalf of the General Services Administration (“GSA”), as well as individuals, has in the past pursued claims against, reached financial settlements with or otherwise obtained damages from companies that sell electronic equipment and from IT vendors under the False Claims Act and other statutes related to pricing, discount practices and compliance with laws related to sales to the federal government, such as the Trade Agreements Act. The DOJ continues to actively pursue such claims. Violations of certain regulatory and contractual requirements could also result in us being suspended or debarred fromfuture government contracting. Any of these outcomes could have an adverse effect on our revenue, operating results, financial condition and prospects.

These laws and regulations impose added costs on our business, and failure to comply with these or other applicable regulations and requirements, including non-compliance in the past, could lead to claims for damages from our channel partners, penalties, termination of contracts, loss of exclusive rights in our intellectual property and temporary suspension or permanent debarment from government contracting. Any such damages, penalties, disruptions or limitations in our ability to do business with the public sector could have an adverse effect on our business and operating results.


We are subject to governmental export and import controls that could subject us to liability restrictionor restrictions on sales, and/orand could impair our ability to compete in international markets.
 
Because we incorporate encryption technology into our products, certain of our products are subject to U.S. export controls and may be exported outside the United StatesU.S. only with the required export license or through an export license exception.exception, and may be prohibited altogether from export to certain countries. If we were to fail to comply with U.S. export licensing,laws, U.S. Customs regulations and import regulations, U.S. economic sanctions and other countries’ import and export laws, we could be subject to substantial civil and criminal penalties, including fines for the company and incarceration for responsible employees and managers, and the possible loss of export or import privileges. In addition, if our channel partners fail to obtain appropriate import, export or re-export licenses or permits (for example, for stocking orders placed by partners as stocking orders for example,our partners), we may also be adversely affected through reputational harm and penalties and we may not be able to provide support related to appliances shipped pursuant to such orders. Obtaining the necessary export license for a particular sale may be time-consuming and may result in the delay or loss of sales opportunities.
 
Furthermore, U.S. export control laws and economic sanctions prohibit the shipment of certain products to U.S. embargoed or sanctioned countries, governments and persons. Even though we take precautions to prevent our product from being shipped to U.S. sanctions targets, our products could be shipped to those targets by our channel partners, despite such precautions. Any such shipment could have negative consequences including government investigations and penalties and reputational harm. In addition, various countries regulate the import of certain encryption technology, including import permitting/permitting and licensing requirements, and have enacted laws that could limit our ability to distribute our products or could limit our customers’ ability to implement our products in those countries. Changes in our products or changes in export and import regulations may create delays in the introduction of our products in international markets, prevent our customers with

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international operations from deploying our products globally or, in some cases, prevent the export or import of our products to certain countries, governments or persons altogether. Any change in export or import regulations, economic sanctions or related legislation, shift in the enforcement or scope of existing regulations, or change in the countries, governments, persons or technologies targeted by such regulations, could result in decreased use of our products by, or in our decreased ability to export or sell our products to, existing or potential customers with international operations. Any decreased use of our products or limitation on our ability to export or sell our products would likely adversely affect our business, financial condition and results of operations.
 
Efforts to withdraw from or materially modify NAFTA or other international trade agreements, to change tax provisions related to global manufacturing and sales or to impose new tariffs, economic sanctions or related legislation, any of which could our adversely affect our financial condition and results of operations.

Our business benefits from free trade agreements, such as the North American Free Trade Agreement (“NAFTA”), and we also rely on various U.S. corporate tax provisions related to international commerce, as we develop, market and sell our products and services globally. Efforts to withdraw from or materially modify NAFTA or other international trade agreements, or to change corporate tax policy related to international commerce, could adversely affect our financial condition and results of operations as could the continuing uncertainty regarding whether such actions will be taken. Moreover, efforts to implement changes related to export or import regulations (including the imposition of new border taxes or tariffs on foreign imports), economic sanctions or related policies. Any modification in these areas, any shift in the enforcement or scope of existing regulations or any change in the countries, governments, persons or technologies targeted by such regulations, could result in decreased use of our products by, or in our decreased ability to export or sell our products to, existing or potential end-customers with international operations and could result in increased costs. Any decreased use of our products or limitation on our ability to export or sell our products would likely adversely affect our business, financial condition and results of operations.

If we fail to comply with environmental requirements, our business, financial condition, operating results and reputation could be adversely affected.
 
We are subject to various environmental laws and regulations, including laws governing the hazardous material content of our products, and laws relating to our real property and future expansion plans and laws concerning the recycling of electrical and electronic equipment. The laws and regulations to which we are subject include the EU RoHS and the EU Waste Electrical and Electronic Equipment Directive (“WEEE Directive”), as well as the implementing legislation of the EU member states. Similar laws and regulations have been passed or are pending in China, South Korea, Norway and Japan and may be enacted in other regions, including in the United States,U.S., and we are, or may in the future be, subject to these laws and regulations.
 

The EU RoHS and the similar laws of other jurisdictions ban the use of certain hazardous materials such as lead, mercury and cadmium in the manufacture of electrical equipment, including our products. We have incurred costs to comply with these laws, including research and development costs, costs associated with assuring the supply of compliant components and costs associated with writing off noncompliant inventory. We expect to continue to incur costs related to environmental laws and regulations in the future. With respect to the EU RoHS, we and our competitors rely on an exemption for lead in network infrastructure equipment. It is possible this exemption will be revoked in the near future. If this exemption is revoked, if there are other changes to these laws (or their interpretation) or if new similar laws are passed in other jurisdictions, we may be required to reengineer our products to use components compatible with these regulations. This reengineering and component substitution could result in additional costs to us or disrupt our operations or logistics.
 
The EU has also adopted the WEEE Directive, which requires electronic goods producers to be responsible for the collection, recycling and treatment of such products. Although currently our EU international channel partners are responsible for the requirements of this directive as the importer of record in most of the European countries in which we sell our products, changes in interpretation of the regulations may cause us to incur costs or have additional regulatory requirements in the future to meet in order to comply with this directive, or with any similar laws adopted in other jurisdictions.
 
Our failure to comply with these and future environmental rules and regulations could result in reduced sales of our products, increased costs, substantial product inventory write-offs, reputational damage, penalties and other sanctions.
 
A portion of our revenue is generated by sales to government organizations, which are subject to a number of challenges and risks.
 
Sales to U.S. and foreign federal, state and local governmental agency end-customers have accounted for a portion of our revenue in past periods, and we may in the future increase sales to government organizations. Sales to government organizations are subject to a number of risks. Selling to government organizations can be highly competitive, expensive and time consuming, often requiring significant upfront time and expense, with long sales cycles and without any assurance that we will winof winning a sale.

Government demand, sales and payment for our products and services may be negatively impacted by numerous factors and requirements unique to selling to government agencies, such as:

public sector budgetary cycles,cycles;

funding authorizations and requirements unique to government agencies, with funding or purchasing reductions or delays adversely affecting public sector demand for our products,products;

geopolitical matters,matters; and

rules and regulations applicable to certain government sales.sales, including General Services Administration regulations.


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The rules and regulations applicable to sales to government organizations may also negatively impact sales to other organizations. To date, we have had limited traction in sales to U.S. federal government agencies, and any future sales to government organizations is uncertain. All of our sales to government organizations have been made indirectly through our distribution channel. Government organizations may have contractual or other legal rights to terminate contracts with our distributors and resellers for convenience or due to a default, and any such termination may adversely impact our future results of operations. For example, if the distributor receives a significant portion of its revenue from sales to such government organization, the financial health of the distributor could be substantially harmed, which could negatively affect our future sales to such distributor. Governments routinely investigate and audit government contractors’ administrative processes, and any unfavorable audit could result in the government refusing to continue buying our products and services, a reduction of revenue or fines or civil or criminal liability if the audit uncovers improper or illegal activities. Any such penalties could adversely impact our results of operations in a material way. Finally, purchases by the U.S. government may require certain products to be manufactured in the United StatesU.S. and other high cost manufacturing locations, and we may not manufacture all products in locations that meet the requirements of the U.S. government.
 
False detection of vulnerabilities, viruses or security breaches or false identification of spam or spyware could adversely affect our business.
 
Our antivirus and our intrusion prevention services may falsely detect viruses or other threats that do not actually exist. This risk is heightened by the inclusion of a “heuristics” feature in our products, which attempts to identify viruses and

other threats not based on any known signatures but based on characteristics or anomalies that may indicate that a particular item is a threat. When our end-customers enable the heuristics feature in our products, the risk of falsely identifying viruses and other threats significantly increases. These false positives, while typical in the industry, may impair the perceived reliability of our products and may therefore adversely impact market acceptance of our products. Also, our anti-spam and anti-malware services may falsely identify emails or programs as unwanted spam or potentially unwanted programs, or alternatively fail to properly identify unwanted emails or programs, particularly as spam emails or spyware are often designed to circumvent anti-spam or spyware products. Parties whose emails or programs are blocked by our products may seek redress against us for labeling them as spammers or spyware, or for interfering with their business. In addition, false identification of emails or programs as unwanted spam or potentially unwanted programs may reduce the adoption of our products. If our system restricts important files or applications based on falsely identifying them as malware or some other item that should be restricted, this could adversely affect end-customers’ systems and cause material system failures. In addition, our threat researchers periodically identify vulnerabilities in various third-party products, and, if these identifications are perceived to be incorrect or are in fact incorrect, this could harm our business. Any such false identification or perceived false identification of important files, applications or applicationsvulnerabilities could result in negative publicity, loss of end-customers and sales, increased costs to remedy any problem and costly litigation.
 
If our internal network system or our website is compromised, by computer hackers, public perception of our products and services will be harmed.harmed, we may become subject to liability, and our business, operating results and stock price may be adversely impacted.

We will not succeed unlessOur success depends on the marketplace is confident that wemarket’s confidence in our ability to provide effective network security protection. BecauseDespite our efforts and processes to prevent breaches of our internal network system and website, we are still vulnerable to computer viruses, break-ins, phishing attacks, attempts to overload our servers with denial-of-service and other cyber-attacks and similar disruptions from unauthorized access to our internal network system or our website. Our security measures may also be breached due to employee error, malfeasance or otherwise, and third parties may attempt to fraudulently induce our employees to transfer funds or disclose information in order to gain access to our network and confidential information. We cannot guarantee that the measures we have taken to protect our network and website will provide absolute security. Moreover, because we provide network security products, we may be a more attractive target for attacks by computer hackers. Although we have not yet experienced significant damages from unauthorized access by a third party of our internal network ifor website, an actual or perceived breach of network security occurs in our internal systems itor website could adversely affect the market perception of our products and services. In addition, such a securityservices and investor confidence in our company. Any breach of our network system or website could impair our ability to operate our business, including our ability to provide FortiGuard security subscription and FortiCare technical support services to our end-customers. If this happens, our revenueend-customers, lead to interruptions or system slowdowns, cause loss of critical data, or lead to the unauthorized disclosure or use of confidential, proprietary or sensitive information. We could declinealso be subject to liability and litigation and reputational harm and our channel partners and end-customers may be harmed, lose confidence in us and decrease or cease using our products and services. Any breach of our internal network system or our website could have an adverse effect on our business, could suffer.operating results and stock price.
 
Our ability to sell our products is dependent on the quality of our technical support services, and our failure to offer high quality technical support services would have a material adverse effect on our sales and results of operations.
 
Once our products are deployed within our end-customers’ networks, our end-customers depend on our technical support services, as well as the support of our channel partners and other third parties, to resolve any issues relating to our products. If we, or our channel partners or other third parties 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, our ability to sell additional products and services to existing customers would be adversely affected and our reputation with potential customers could be damaged. Many large end-customers, service provider and government organization end-customers require higher levels of support than smaller end-customers because of their more complex deployments. If we, our channel partners or other third parties fail to meet the requirements of our larger end-customers, it may be more difficult to execute on our strategy to increase our penetration with large enterprises, service providers and government organizations. As a result, our failure to maintain high quality support services would have a material adverse effect on our business, financial condition and results of operations.


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We could be subject to changes in our tax rates, the adoption of new U.S. or international tax legislation, or exposure to additional tax liabilities.

We are subject to taxes in the United StatesU.S. and numerous foreign jurisdictions, where a number of our subsidiaries are organized. Our provision for income taxes is subject to volatility and could be adversely affected by several factors, many of which are outside of our control, including:
 

earnings being lower than anticipated in countries that have lower tax rates and higher than anticipated in countries that have higher tax rates;

the mix of earnings in countries with differing statutory tax rates or withholding taxes;
 
changes in the valuation of our deferred tax assets and liabilities;
 
expiration of, or lapses in the research and development tax credit laws;
transfer pricing adjustments;
 
an increase in non-deductible expenses for tax purposes, including certain stock-based compensation expense, write-offs of acquired in-process research and development, and impairment of goodwill;

tax costs related to intercompany realignments;
 
tax assessments resulting from income tax audits or any related tax interest or penalties that could significantly affect our provision for income taxes for the period in which the settlement takes place;
 
a change in our decision to indefinitely reinvest foreign earnings;
 
changes in accounting principles;

court decisions, tax rulings and interpretations of tax laws, and regulations by international, federal or local governmental authorities; or
 
changes in tax laws and regulations, including possible changes in the United StatesU.S. to the taxation of earnings of our foreign subsidiaries, and the deductibility of expenses attributable to foreign income or the foreign tax credit rules, or changes to the U.S. income tax rate, which would necessitate a revaluation of our deferred tax assets and liabilities.
 
Significant judgment is required to determine the recognition and measurement attribute prescribed in the Financial Accounting Standards Board (“FASB”) standard. In addition, the standard applies to all income tax positions, including the potential recovery of previously paid taxes, which, if settled unfavorably, could adversely impact our provision for income taxes or additional paid-in capital. Further, as a result of certain of our ongoing employment and capital investment actions and commitments, our income in certain foreign countries is subject to reduced tax rates and, in some cases, is wholly exempt from tax. Our failure to meet these commitments could adversely impact our provision for income taxes. In addition, we are subject to the examination of our income tax returns by the Internal Revenue Service (“IRS”) and other tax authorities. Tax authorities in France are currently examining the inter-company relationship between Fortinet, Inc., Fortinet France and Fortinet Singapore. We are in the early stages of this inquiry and as of yet no official audit has been opened. We regularly assess the likelihood of adverse outcomes resulting from such examinations to determine the adequacy of our provision for income taxes.

Although we currently do not have a valuation allowance, we may in the future be required to establish one. We will continue to assess the need for a valuation allowance on the deferred tax asset by evaluating both positive and negative evidence that may exist.

Forecasting our estimated annual effective tax rate is complex and subject to uncertainty, and there may be material differences between our forecasted and actual tax rates.
 
Forecasts of our income tax position and effective tax rate are complex, subject to uncertainty and periodic updates because our income tax position for each year combines the effects of a mix of profits earned and losses incurred by us in various tax jurisdictions with a broad range of income tax rates, as well as changes in the valuation of deferred tax assets and liabilities, the impact of various accounting rules and changes to these rules and tax laws, the results of examinations by various tax authorities, and the impact of any acquisition, business combination or other reorganization or financing transaction. To forecast our global tax rate, we estimate our pre-tax profits and losses by jurisdiction and forecast our tax expense by

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jurisdiction. If the mix of profits and losses, our ability to use tax credits or effective tax rates byin a given jurisdiction is different than those estimated,differs from our estimate, our actual tax rate could be materially different than forecasted, which could have a material impact on our results of business, financial condition and results of operations. Additionally, our actual tax rate may be subject to further uncertainty due to potential changes in U.S. and foreign tax rules.
 

As a multinational corporation, we conduct our business in many countries and are subject to taxation in many jurisdictions. The taxation of our business is subject to the application of multiple and sometimes conflicting tax laws and regulations, as well as multinational tax conventions. Our effective tax rate is highly dependent upon the geographic distribution of our worldwide earnings or losses, the tax regulations and tax holidays in each geographic region, the availability of tax credits and carryforwards, and the effectiveness of our tax planning strategies. The application of tax laws and regulations is subject to legal and factual interpretation, judgment and uncertainty. Tax laws themselves are subject to change as a result of changes in fiscal policy, changes in legislation, and the evolution of regulations and court rulings. Consequently, taxing authorities may impose tax assessments or judgments against us that could materially impact our tax liability and/or our effective income tax rate.

The Organisation for Economic Co-operation and Development (the “OECD”), an international association comprised of 34 countries, including the U.S., has been working on a Base Erosion and Profit Sharing Project. As part of this project, the OECD issued in 2015, and is expected to continue to issue, guidelines and proposals that may change various aspects of the existing framework under which our tax obligations are determined in many of the countries in which we do business. Due to our extensive international business activities, any changes in the taxation of such activities could increase our tax obligations in many countries and may increase our worldwide effective tax rate.
 
In addition, we may beare subject to examination of our income tax returns by the IRS and other tax authorities. If tax authorities challenge the relative mix of U.S. and international income, our future effective income tax rates could be adversely affected. 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 sufficient and that a determination by a tax authority will not have an adverse effect on our business, financial condition and results of operations.

Our inability to acquire and integrate other businesses, products or technologies could seriously harm our competitive position.
 
In order to remain competitive, we may seek to acquire additional businesses, products, or technologies and intellectual property, such as patents. IfFor example, we identify an appropriateclosed our acquisitions of Meru and AccelOps in the third quarter of 2015 and the second quarter of 2016, respectively. For any past acquisition candidate,or possible future acquisition, we may not be successful in negotiating the terms of the acquisition, financing the acquisition, or effectively integrating the acquired business, product, technology or intellectual property and sales force into our existing business and operations. We may have difficulty incorporating acquired technologies, intellectual property or products with our existing product lines, integrating reporting systems and procedures, and maintaining uniform standards, controls, procedures and policies. For example, we may experience difficulties integrating an acquired company’s ERP system, sales and support processes and systems, and other processes and systems with our current systems and processes. Our due diligence may fail to identify all of the problems, liabilities or other shortcomings or challenges of an acquired business, product or technology, including issues with intellectual property, product quality or product architecture, regulatory compliance practices, revenue recognition or other accounting practices or employee or customer issues, and we may not accurately forecast the financial impact of an acquisition. In addition, any acquisitions we are able to complete may be dilutive to revenue growth and earnings and may not result in any synergies or other benefits we had expected to achieve, which could result in impairment charges that could be substantial. For example,We may have to pay cash, incur debt, or issue equity securities to pay for any acquisition, each of which could affect our financial condition or the value of our capital stock and could result in the second quarter of 2014, we recognized an impairment charge of $2.4 million for intangible assets fromdilution to our acquisition of Coyote Point Systems, Inc.stockholders. Acquisitions during a quarter may result in increased operating expenses and adversely affect our results of operations for that period or future periods compared to the results that we have previously forecasted or achieved. Further, completing a potential acquisition and integrating acquired businesses, products, technologies or intellectual property could significantly divert management time and resources.

Our business is subject to the risks of warranty claims, product returns, product liability and product defects.
 
Our products are very complex and, despite testing prior to their release, have contained and may contain undetected defects or errors, especially when first introduced or when new versions are released. Product errors have affected the performance of our products and could delay the development or release of new products or new versions of products, adversely affect our reputation and our end-customers’ willingness to buy products from us, and adversely affect market acceptance or perception of our products. Any such errors or delays in releasing new products or new versions of products or allegations of unsatisfactory performance could cause us to lose revenue or market share, increase our service costs, cause us to incur substantial costs in redesigning the products, cause us to lose significant end-customers, subject us to liability for damages and divert our resources from other tasks, any one of which could materially and adversely affect our business, results of operations and financial condition. Our products must successfully interoperate with products from other vendors. As a result, when problems occur in a network, it may be difficult to identify the sources of these problems. The occurrence of hardware and software errors, whether or not caused by our products, could delay or reduce market acceptance of our products,

and have an adverse effect on our business and financial performance, and any necessary revisions may cause us to incur significant expenses. The occurrence of any such problems could harm our business, financial condition and results of operations.
 
Although we generally have limitation of liability provisions in our standard terms and conditions of sale, they may not fully or effectively protect us from claims as a result of federal, state or local laws or ordinances or unfavorable judicial decisions in the

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United States U.S. or other countries, and in some circumstances we may be required to indemnify a customer in full, without a limitation on liability, for certain liabilities, including potential liabilities that are not contractually limited. The sale and support of our products also entail the risk of product liability claims. We maintain insurance to protect against certain claims associated with the use of our products, but our insurance coverage may not cover such claim at all or may not adequately cover any claim asserted against us, and in some instances may subject us to potential liability that is not contractually limited. In addition, even claims that ultimately are unsuccessful could result in our expenditure of funds in litigation and divert management’s time and other resources.
 
Our business is subject to the risks of earthquakes, fire, power outages, floods and other catastrophic events, and to interruption by manmade problems such as civil unrest, labor disruption, and terrorism.

A significant natural disaster, such as an earthquake, fire, power outages, floods,outage, flood, or other catastrophic eventsevent could have a material adverse impact on our business, operating results and financial condition. Our corporate headquarters are located in the San Francisco Bay Area, a region known for seismic activity, and our research and development and data office center in Vancouver, Canada is subject to the risk of flooding and is also in a region known for seismic activity. In addition, natural disasters could affect our manufacturing vendors, suppliers or logistics providers’ ability to perform services, such as obtaining product components and manufacturing products, on a timely basis andor assisting with shipments, on a timely basis.basis, as well as our customers’ ability to order from us and our employees’ ability to perform their duties. In the event our or our service providers’ information technology systems or manufacturing or logistics abilities are hindered by any of the events discussed above, shipments could be delayed, resulting in usour missing financial targets, such as revenue and shipment targets, for a particular quarter. In addition, regional instability, civil unrest, labor disruptions, acts of terrorism and other geo-political unrest could cause disruptions in our business or the business of our manufacturers, logistics providers, partners or end-customers, or of the economy as a whole. For example, recently, ports in the west coast of the United States have experienced work slowdowns related to ongoing union labor contract negotiations. Given our typical concentration of sales at the end of each quarter, end, any disruption in the business of our manufacturers, logistics providers, partners or end-customers that impacts sales at the end of our quarter could have a significant adverse impact on our quarterly results. To the extent that any of the above results in delays or cancellations of customer orders, or in the delay inof the manufacture, deployment or shipment of our products, our business, financial condition and results of operations would be adversely affected.

Risks Related to Our Industry

The network security market is rapidly evolving and the complex technology incorporated in our products makes them difficult to develop. If we do not accurately predict, prepare for and respond promptly to technological and market developments and changing end-customer needs, our competitive position and prospects will be harmed.
 
The network security market is expected to continue to evolve rapidly. Moreover, many of our end-customers operate in markets characterized by rapidly changing technologies and business plans, which require them to add numerous network access points and adapt increasingly complex enterprise networks, incorporating a variety of hardware, software applications, operating systems and networking protocols. In addition, computer hackers and others who try to attack networks employ increasingly sophisticated techniques to gain access to and attack systems and networks. The technology in our products is especially complex because it needs to effectively identify and respond to new and increasingly sophisticated methods of attack, while minimizing the impact on network performance. Additionally, some of our new products and enhancements may require us to develop new hardware architectures and ASICs that involve complex, expensive and time consuming research and development processes. Although the market expects rapid introduction of new products or product enhancements to respond to new threats, the development of these products is difficult and the timetable for commercial release and availability is uncertain and there can be long time periods between releases and availability of new products. We have in the past and may in the future experience unanticipated delays in the availability of new products and services and fail to meet previously announced timetables for such availability. If we do not quickly respond to the rapidly changing and rigorous needs of our end-customers by developing and releasing and making available on a timely basis new products and services or enhancements that can respond adequately to new security threats, our competitive position and business prospects will be harmed.

Moreover, business models based on software-as-a-service (“SaaS”) and infrastructure-as-a-service (“Iaas”), both of which are hosted or cloud-based services, have become increasingly in-demand by our end-customers and adopted by other providers, including our competitors. While part of our platform is cloud-based, most of our platform is currently deployed on

premise, and therefore, if customers demand that our platform be provided through a SaaS or IaaS business model, we would be required to make additional investments in our infrastructure and personnel to be able to more fully provide our platform through a SaaS or IaaS model in order to maintain the competitiveness of our platform. Such investments may involve expanding our data centers, servers and networks, and increasing our technical operations and engineering teams. These risks are compounded by the uncertainty concerning the future viability of SaaS and IaaS business models and the future demand for such models by customers. Additionally, if we are unable to meet the demand to provide our services through a SaaS or IaaS model, we may lose customers to competitors.

Our URLuniform resource locator (“URL”) database for our web filtering service may fail to keep pace with the rapid growth of URLs and may not categorize websites in accordance with our end-customers expectations.
 
The success of our web filtering service depends on the breadth and accuracy of our URL database. Although our URL database currently catalogs millions of unique URLs, it contains only a portion of the URLs for all of the websites that are available on the Internet. In addition, the total number of URLs and software applications is growing rapidly, and we expect this rapid growth to continue in the future. Accordingly, we must identify and categorize content for our security risk categories at an extremely rapid rate. Our database and technologies may not be able to keep pace with the growth in the number of websites, especially the growing amount of content utilizing foreign languages and the increasing sophistication of malicious code and the delivery mechanisms associated with spyware, phishing and other hazards associated with the Internet. Further,

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the ongoing evolution of the Internet and computing environments will require us to continually improve the functionality, features and reliability of our web filtering function. Any failure of our databases to keep pace with the rapid growth and technological change of the Internet could impair the market acceptance of our products, which in turn could harm our business, financial condition and results of operations.
 
In addition, our web filtering service may not be successful in accurately categorizing Internet and application content to meet our end-customers’ expectations. We rely upon a combination of automated filtering technology and human review to categorize websites and software applications in our proprietary databases. Our end-customers may not agree with our determinations that particular URLs should be included or not included in specific categories of our databases. In addition, it is possible that our filtering processes may place material that is objectionable or that presents a security risk in categories that are generally unrestricted by our customers’ Internet and computer access policies, which could result in such material not being blocked from the network. Conversely, we may miscategorize websites such that access is denied to websites containing information that is important or valuable to our customers. Any miscategorization could result in customer dissatisfaction and harm our reputation. Any failure to effectively categorize and filter websites according to our end-customers’ and channel partners’ expectations could impair the growth of our business.

If our new products and product enhancements do not achieve sufficient market acceptance, our results of operations and competitive position will suffer.
 
We spend substantial amounts of time and money to research and develop new products and enhanced versions of our existing products in order to incorporate additional features, improved functionality or other enhancements in order to meet our customers’ rapidly evolving demands for network security in our highly competitive industry. When we develop a new product or an enhanced version of an existing product, we typically incur expenses and expend resources upfront to market, promote and sell the new offering. Therefore, when we develop and introduce new or enhanced products, they must achieve high levels of market acceptance in order to justify the amount of our investment in developing and bringing them to market.
 
Our new products or product enhancements could fail to attain sufficient market acceptance for many reasons, including:
 
delays in releasing our new products or enhancements to the market;
 
failure to accurately predict market demand in terms of product functionality and to supply products that meet this demand in a timely fashion;
 
failure of our sales force and partners to focus on selling new products;
 
inability to interoperate effectively with the networks or applications of our prospective end-customers;
 
inability to protect against new types of attacks or techniques used by hackers;
 
actual or perceived defects, vulnerabilities, errors or failures;

 
negative publicity about their performance or effectiveness;
 
introduction or anticipated introduction of competing products by our competitors;
 
poor business conditions for our end-customers, causing them to delay IT purchases;
 
easing ofchanges to the regulatory requirements around security; and
 
reluctance of customers to purchase products incorporating open source software.
 
If our new products or enhancements do not achieve adequate acceptance in the market, our competitive position will be impaired, our revenue will be diminished and the effect on our operating results may be particularly acute because of the significant research, development, marketing, sales and other expenses we incurred in connection with the new product or enhancement.
  

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Demand for our products may be limited by market perception that individual products from one vendor that provide multiple layers of security protection in one product are inferior to point solution network security solutions from multiple vendors.
 
Sales of mostmany of our products depend on increased demand for incorporating broad security functionality in one appliance. If the market for these products fails to grow as we anticipate, our business will be seriously harmed. Target customers may view “all-in-one” network security solutions as inferior to security solutions from multiple vendors because of, among other things, their perception that such products of ours provide security functions from only a single vendor and do not allow users to choose “best-of-breed” defenses from among the wide range of dedicated security applications available. Target customers might also perceive that, by combining multiple security functions into a single platform, our solutions create a “single point of failure” in their networks, which means that an error, vulnerability or failure of our product may place the entire network at risk. In addition, the market perception that “all-in-one” solutions may be suitable only for smallsmall- and medium sizedmedium-sized businesses because such solution lacks the performance capabilities and functionality of other solutions may harm our sales to large enterprise, service provider and government organization end-customers. If the foregoing concerns and perceptions become prevalent, even if there is no factual basis for these concerns and perceptions, or if other issues arise with our market in general, demand for multi-security functionality products could be severely limited, which would limit our growth and harm our business, financial condition and results of operations. Further, a successful and publicized targeted attack against us, exposing a “single point of failure”failure,” could significantly increase these concerns and perceptions and may harm our business and results of operations.
 
We face intense competition in our market and we may lack sufficient financial or other resources to maintain or improve our competitive position.
 
The market for network security products is intensely competitive, and we expect competition to intensify in the future. Our competitors include companies such as Blue Coat, Check Point, Cisco, Dell/SonicWall, F5 Networks, FireEye, Intel/McAfee,Intel, Juniper, Palo Alto Networks, SonicWALL, Sophos and others.Symantec.
 
Many of our existing and potential competitors enjoy substantial competitive advantages such as:
 
greater name recognition and longer operating histories;
 
larger sales and marketing budgets and resources;
 
broader distribution and established relationships with distribution partners and end-customers;
 
access to larger customer bases;
 
greater customer support resources;
 
greater resources to make acquisitions;
 
lower labor and development costs; and
 

substantially greater financial, technical and other resources.
 
In addition, some of our larger competitors have substantially broader product offerings, and leverage their relationships based on other products or incorporate functionality into existing products in a manner that discourages userscustomers from purchasing our products. These larger competitors often have broader product lines and market focus, and are in a better position to withstand any significant reduction in capital spending by end-customers in these markets. Therefore, these competitors will not be as susceptible to downturns in a particular market. Also, many of our smaller competitors that specialize in providing protection from a single type of network security threat are often able to deliver these specialized network security products to the market more quickly than we can. Some of our smaller competitors are using third-party chips designed to accelerate performance. Conditions in our markets could change rapidly and significantly as a result of technological advancements or continuing market consolidation. Our competitors and potential competitors may also be able to develop products or services that are equal or superior to ours, achieve greater market acceptance of their products and services, and increase sales by utilizing different distribution channels than we do. Our current and potential competitors may also establish cooperative relationships among themselves or with third parties that may further enhance their resources. In addition, current or potential competitors may be acquired by third parties with greater available resources, (such as Juniper’s acquisition of NetScreen Technologies Inc., Intel’s acquisition of McAfee, McAfee’s acquisition of Stonesoft, Check Point’s acquisition of Nokia Corporations’ security appliance business and Dell’s acquisition of SonicWALL), and new competitors may arise pursuant to acquisitions of network security companies or divisions. As a result of such acquisitions, competition in our market may

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continue to increase and our current or potential competitors might be able to adapt more quickly to new technologies and customer needs, devote greater resources to the promotion or sale of their products and services, initiate or withstand substantial price competition, take advantage of acquisition or other opportunities more readily, or develop and expand their product and service offerings more quickly than we do. In addition, our competitors may bundle products and services competitive with ours with other products and services. Customers may accept these bundled products and services rather than separately purchasing our products and services. Due to budget constraints or economic downturns, organizations may be more willing to incrementally add solutions to their existing network security infrastructure from competitors than to replace it with our solutions. These competitive pressures in our market or our failure to compete effectively may result in price reductions, fewer customer orders, reduced revenue and gross margins and loss of market share.
 
If functionality similar to that offered by our products is incorporated into existing network infrastructure products, organizations may decide against adding our appliances to their network, which would have an adverse effect on our business.
 
Large, well-established providers of networking equipment such as Cisco, F5 Networks and Juniper offer, and may continue to introduce, network security features that compete with our products, either in stand-alonestandalone security products or as additional features in their network infrastructure products. The inclusion of, or the announcement of an intent to include, functionality perceived to be similar to that offered by our security solutions in networking products that are already generally accepted as necessary components of network architecture may have an adverse effect on our ability to market and sell our products. Furthermore, even if the functionality offered by network infrastructure providers is more limited than our products, a significant number of customers may elect to accept such limited functionality in lieu of adding appliances from an additional vendor such as us. Many organizations have invested substantial personnel and financial resources to design and operate their networks and have established deep relationships with other providers of networking products, which may make them reluctant to add new components to their networks, particularly from other vendors such as us. In addition, an organization’s existing vendors or new vendors with a broad product offering may be able to offer concessions that we are not able to match because we currently offer only network security products and have fewer resources than many of our competitors. If organizations are reluctant to add additional network infrastructure from new vendors or otherwise decide to work with their existing vendors, our business, financial condition and results of operations will be adversely affected.

Risks Related to Intellectual Property

Our proprietary rights may be difficult to enforce, which could enable others to copy or use aspects of our products without compensating us.
 
We rely primarily on patent, trademark, copyright and trade secrets laws and confidentiality procedures and contractual provisions to protect our technology. Valid patents may not issue from our pending applications, and the claims eventually allowed on any patents may not be sufficiently broad to protect our technology or products. Any issued patents may be challenged, invalidated or circumvented, and any rights granted under these patents may not actually provide adequate defensive protection or competitive advantages to us. Patent applications in the United StatesU.S. are typically not published until at least 18 months after filing, or, in some cases, not at all, and publications of discoveries in industry-related literature lag behind actual discoveries. We cannot be certain that we were the first to make the inventions claimed in our pending patent applications or that we were the first to file for patent protection. Additionally, the process of obtaining patent protection is expensive and time-consuming, and we may not be able to prosecute all necessary or desirable patent applications at a reasonable cost or in a

timely manner. In addition, recent changes to the patent laws in the United StatesU.S. may bring into question the validity of certain software patents and may make it more difficult and costly to prosecute patent applications. As a result, we may not be able to obtain adequate patent protection or effectively enforce our issued patents.
 
Despite our efforts to protect our proprietary rights, unauthorized parties may attempt to copy aspects of our products or obtain and use information that we regard as proprietary. We generally enter into confidentiality or license agreements with our employees, consultants, vendors and customers, and generally limit access to and distribution of our proprietary information. However, we cannot assure youguarantee that the steps taken by us will prevent misappropriation of our technology. Policing unauthorized use of our technology or products is difficult. In addition, the laws of some foreign countries do not protect our proprietary rights to as great an extent as the laws of the United States,U.S., and many foreign countries do not enforce these laws as diligently as government agencies and private parties in the United States.U.S. From time to time, legal action by us may be necessary to enforce our patents and other intellectual property rights, to protect our trade secrets, to determine the validity and scope of the proprietary rights of others or to defend against claims of infringement or invalidity. Such litigation could result in substantial costs and diversion of resources and could negatively affect our business, operating results and financial condition. If we are unable to protect our proprietary rights (including aspects of our software and products protected

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other than by patent rights), we may find ourselves at a competitive disadvantage to others who need not incur the additional expense, time and effort required to create the innovative products that have enabled us to be successful to date.

Our products contain third-party open source software components, and failure to comply with the terms of the underlying open source software licenses could restrict our ability to sell our products.
 
Our products contain software modules licensed to us by third-party authors under “open source” licenses, including the GNU Public License, the GNU Lesser Public License, (LGPL), the BSD License, the Apache License the MIT X License and others.the Mozilla Public License. From time to time, there have been claims against companies that distribute or use open source software in their products and services, asserting that open source software infringes the claimants’ intellectual property rights. We could be subject to suits by parties claiming infringement of intellectual property rights in what we believe to be licensed open source software. Use and distribution of open source software may entail greater risks than use of third-party commercial software, as open source licensors generally do not provide warranties or other contractual protections regarding infringement claims or the quality of the code. Some open source licenses contain requirements that we make available source code for modifications or derivative works we create based upon the type of open source software we use. If we combine our proprietary software with open source software in a certain manner, we could, under certain open source licenses, be required to release the source code of our proprietary software to the public. This would allow our competitors to create similar products with lower development effort and time and ultimately could result in a loss of product sales for us.
 
Although we monitor our use of open source software to avoid subjecting our products to conditions we do not intend, the terms of many open source licenses have not been interpreted by United StatesU.S. courts, and there is a risk that these licenses could be construed in a way that could impose unanticipated conditions or restrictions on our ability to commercialize our products. In this event, we could be required to seek licenses from third parties to continue offering our products, to make our proprietary code generally available in source code form, our proprietary code, to re-engineer our products or to discontinue the sale of our products if re-engineering could not be accomplished on a timely basis, any of which requirements could adversely affect our business, operating results and financial condition.
 
Claims by others that we infringe their proprietary technology or other litigation matters could harm our business.
 
Patent and other intellectual property disputes are common in the network security industry. Third parties are currently asserting, have asserted and may in the future assert claims of infringement of intellectual property rights against us. They mayhave also assertasserted such claims against our end-customers or channel partners whom we typicallymay indemnify against claims that our products infringe the intellectual property rights of third parties. As the number of products and competitors in our market increases and overlaps occur, infringement claims may increase. Any claim of infringement by a third-party, even those without merit, could cause us to incur substantial costs defending against the claim and could distract our management from our business. In addition, litigation may involve patent holding companies, non-practicing entities or other adverse patent owners who have no relevant product revenue and against whom our own patents may therefore provide little or no deterrence or protection.
 
Although third parties may offer a license to their technology, the terms of any offered license may not be acceptable, and the failure to obtain a license or the costs associated with any license could cause our business, financial condition and results of operations to be materially and adversely affected. In addition, some licenses may be non-exclusive and, therefore, our competitors may have access to the same technology licensed to us.
 

Alternatively, we may be required to develop non-infringing technology, which could require significant time, effort and expense, and may ultimately not be successful. Furthermore, a successful claimant could secure a judgment or we may agree to a settlement that prevents us from distributing certain products or performing certain services or that requires us to pay substantial damages (including treble damages if we are found to have willfully infringed such claimant’s patents or copyrights), royalties or other fees. Any of these events could seriously harm our business, financial condition and results of operations.

From time to time we are subject to lawsuits claiming patent infringement. We are also subject to other litigation in addition to patent infringement claims, such as employment-related litigation and disputes, as well as general commercial litigation, and could become subject to other forms of litigation and disputes, including stockholder litigation. If we are unsuccessful in defending any such claims, our operating results and financial condition and results may be materially and adversely affected. For example, we may be required to pay substantial damages and could be prevented from selling certain of our products. Litigation, with or without merit, could negatively impact our business, reputation and sales in a material fashion.

We have several on-goingongoing patent lawsuits, and, several non-practicing entity patent holding companies have sent us

26


letters proposing that we license certain of their patents.patents and organizations have sent letters demanding that we provide indemnification for patent claims. Given this and the proliferation of lawsuits in our industry and other similar industries by both non-practicing entities and operating entities, we expect that we will be sued for patent infringement in the future, regardless of the merits of any such lawsuits. The cost to defend such lawsuits and any adverse result in such lawsuits could have a material adverse effect on our results of operations and financial condition.

We rely on the availability of third-party licenses.
 
Many of our products include software or other intellectual property licensed from third parties. It may be necessary in the future to renew licenses relating to various aspects of these products or to seek new licenses for existing or new products. There can be no assurance that the necessary licenses would be available on acceptable terms, if at all. The inability to obtain certain licenses or other rights or to obtain such licenses or rights on favorable terms, or the need to engage in litigation regarding these matters, could result in delays in product releases until equivalent technology can be identified, licensed or developed, if at all, and integrated into our products and may have a material adverse effect on our business, operating results, and financial condition. Moreover, the inclusion in our products of software or other intellectual property licensed from third parties on a nonexclusive basis could limit our ability to differentiate our products from those of our competitors.

Risks Related to Ownership of our Common Stock

As a public company, we are subject to compliance initiatives that will require substantial time from our management and result in significantly increased costs that may adversely affect our operating results and financial condition.
 
The Sarbanes-Oxley Act of 2002 the(“Sarbanes-Oxley”), Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010, as well as other rules implemented by the SEC and The NASDAQ Stock Market impose various requirements on public companies, including requiring changes in corporate governance practices. These andrequirements, as well as proposed corporate governance laws and regulations under consideration, may further increase our compliance costs. If compliance with these various legal and regulatory requirements diverts our management’s attention from other business concerns, it could have a material adverse effect on our business, financial condition and results of operations. The Sarbanes-Oxley Act requires, among other things, that we assess the effectiveness of our internal control over financial reporting annually, and of our disclosure controls and procedures quarterly. We completedAlthough our evaluation of our internal controls over financial reporting for fiscal 2014 as required by Section 404 of the Sarbanes-Oxley Act of 2002. Although ourmost recent assessment, testing and evaluation resulted in our conclusion that as of December 31, 2014,2016, our internal controls over financial reporting were effective, we cannot predict the outcome of our testing in fiscal 20152017 or future periods. In May 2013, the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”) issued an updated version of its Internal Control - Integrated Framework (“2013 Framework”), which was originally issued in 1992 to help organizations design, implement and evaluate the effectiveness of internal controls. As of December 31, 2014, we completed our transition to the 2013 Framework. We expect the continuing requirements of the new framework to increase our legal, accounting and financial compliance costs, make some activities more difficult, time-consuming and costly, and place a significant burden on our personnel, systems and resources. If our internal controls or disclosure controls are ineffective in future periods, our business and reputation could be harmed. We may incur additional expenses and commitment of management’s time in connection with further evaluations, both of which could materially increase our operating expenses and accordingly reduce our operating results.
 
Changes in financial accounting standards may cause adverse unexpected fluctuations and affect our reported results of operations.
 
A change in accounting standards or practices, and varying interpretations of existing or new accounting pronouncements, such as changes to standards related to revenue recognition which(which are effective for us beginning on January 1, 2017,2018) and accounting for leases, as well as the increased use of fair value measure,significant costs that may be incurred to adopt and financial instrumentsto comply with these new pronouncements, could have a significant effect on our reported financial results or the way we conduct our business. If we do not ensure that our systems and processes are aligned with the new standards, we could encounter difficulties generating quarterly and annual financial statements in a timely manner, which would have an adverse effect on our business and our ability to meet our reporting obligations.

If securities or industry analysts stop publishing research or publish inaccurate or unfavorable research about our business, our stock price and trading volume could decline.
 
The trading market for our common stock will depend in part on the research and reports that securities or industry analysts publish about us or our business. If we do not maintain adequate research coverage or if one or more of the analysts who coverscover us downgrades our stock or publishes inaccurate or unfavorable research about our business, our stock price would likelycould decline. If one or more of these analysts ceases coverage of our company or fails to publish reports on us regularly, demand for our stock could decrease, which could cause our stock price and trading volume to decline.
 

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The trading price of our common stock is likely tomay be volatile.
 
The market price of our common stock ismay be subject to wide fluctuations in response to, among other things, the risk factors described in this periodic report, news about us and our financial results, news about our competitors and their results, and other factors such as rumors or fluctuations in the valuation of companies perceived by investors to be comparable to us, or announcements regarding our shareany stock repurchase programprograms and the timing and amount of shares we purchase under the program.such programs. For example, in fiscal 2014,during 2016, the closing price of our common stock ranged from $19.02$23.83 to $31.31.$37.17 per share.

 
Furthermore, the stock markets have experienced price and volume fluctuations that have affected and continue to affect the market prices of equity securities of many companies. These fluctuations often have been unrelated or disproportionate to the operating performance of those companies. These broad market and industry fluctuations, as well as general economic, political and market conditions, such as recessions, interest rate changes or international currency fluctuations, may negatively affect the market price of our common stock.
 
In the past, many companies that have experienced volatility in the market price of their stock have been subject to securities class action litigation. We may be the target of this type of litigation in the future. Securities litigation against us could result in substantial costs and divert our management’s attention from other business concerns, which could seriously harm our business.

Anti-takeover provisions contained in our certificate of incorporation and bylaws, as well as provisions of Delaware law, could impair a takeover attempt.
 
Our certificate of incorporation, bylaws and Delaware law contain provisions that could have the effect of rendering more difficult, delaying or preventing an acquisition deemed undesirable by our board of directors. Our corporate governance documents include provisions:
 
providing for a classified board of directors whose members serve staggered three-year terms;
 
authorizing “blank check” preferred stock, which could be issued by the board without stockholder approval and may contain voting, liquidation, dividend and other rights superior to our common stock;
 
limiting the liability of, and providing indemnification to, our directors and officers;
 
limiting the ability of our stockholders to call and bring business before special meetings;
 
requiring advance notice of stockholder proposals for business to be conducted at meetings of our stockholders and for nominations of candidates for election to our board of directors;

providing that certain litigation matters may only be brought against us in state or federal courts in the State of Delaware;
 
controlling the procedures for the conduct and scheduling of board and stockholder meetings; and
 
providing the board of directors with the express power to postpone previously scheduled annual meetings and to cancel previously scheduled special meetings.
 
These provisions, alone or together, could delay or prevent hostile takeovers and changes in control or changes in our management.
 

As a Delaware corporation, we are also subject to provisions of Delaware law, including Section 203 of the Delaware General Corporation law, which prevents some stockholders holding more than 15% of our outstanding common stock from engaging in certain business combinations without approval of the holders of a substantial majority of all of our outstanding common stock.
 
Any provision of our certificate of incorporation or bylaws or Delaware law that has the effect of delaying or deterring a change in control could limit the opportunity for our stockholders to receive a premium for their shares of our common stock, and could also affect the price that some investors are willing to pay for our common stock.


28


ITEM 1B.     Unresolved Staff Comments

Not applicable.

ITEM 2.     Properties

In March 2014, we moved ourOur corporate headquarters to 899 Kifer Road,is located in Sunnyvale, California where we ownand comprises approximately 164,000 square feet of office and building space.
Internationally, Along with our corporate headquarters, as of December 31, 2016, we leasealso owned approximately 14,000200,000 square feet in Union City, California used as a distribution facility; approximately 94,000 square feet of data center spaceland and a total ofbuildings adjacent to our corporate headquarters intended to support growth in our business operations; and approximately 98,00064,000 square feet of office space in two buildings in Burnaby, Canada under various leases that expire between July 2015 and July 2020; approximately 24,000 square feet and 31,000 square feet of office space in Ottawa, Canada under a lease that expires in May 2015 and June 2018, respectively; approximately 19,000 square feet of officebuilding space in Sophia, France under a lease that expiresand Ottawa, Canada predominantly used as sales and/or support offices and for research and development work.
In addition, in December 2017; and approximately 26,000January 2017, we purchased 10,000 square feet of office spaceland and building adjacent to our corporate headquarters. We have also made real estate purchases that are currently in Beijing, China under a leaseescrow and purchases that expiresare signed but not yet in August 2015. escrow totaling 350,000 square feet intended to support growth in our business operations.
We also lease salesapproximately 132,000 square feet of space in Vancouver, Canada under lease agreements that expire in 2020 to support our research and supportdevelopment and operations. We maintain additional offices in Australia, Austria, Belgium,throughout the Czech Republic, Egypt, Finland, Germany, Hong Kong,U.S. and various international locations, including Japan, France, India, Indonesia, Israel, Italy, Japan, Korea, Malaysia,China, the UK, Mexico the Netherlands, New Zealand, Philippines, Poland, Russia, Saudi Arabia, Singapore, Spain, Sri Lanka, Sweden, Switzerland, Taiwan, Thailand, United Arab Emirates, and the United Kingdom.Germany. We believe that our existing properties are sufficient and suitable for the conduct ofto meet our business.current needs. We intend to expand our facilities or add new facilities as we add employees and enter new geographic markets, and we believe that suitable additional or alternative space will be available as needed to accommodate ongoing operations and any such growth. However, we expect to incur additional operating expenses and capital expenditures in connection with such new or expanded facilities.

For information regarding the geographical disbursementlocation of our property and equipment, see Note 14 to our consolidated financial statements in Part II, Item 8 of this Annual Report on Form 10-K.


ITEM 3.     Legal Proceedings

We are subject to various claims, complaints and legal actions that arise from time to time in the normal course of business. We believe that the possibility that any of thesethe current pending claims, complaints or legal proceedings will result in a material loss is remote. There can be no assurance that existing or future legal proceedings arising in the ordinary course of business or otherwise will not have a material adverse effect on our business, consolidated financial position, results of operations or cash flows.

In October 2016, we received a letter from the United States Attorney's Office for the Northern District of California requesting information relating to our compliance with the Trade Agreements Act. This inquiry is ongoing and we are fully cooperating with this inquiry. 

ITEM 4.     Mine Safety Disclosure

Not applicable.


29


Part II

ITEM 5.Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

Our common stock is traded on The NASDAQ Global Select Market under the symbol “FTNT.” The following table sets forth, for the time periods indicated, the high and low closing sales price of our common stock, as reported on Thethe NASDAQ Global Select Market.
2014 20132016 2015
High Low High LowHigh Low High Low
Fourth Quarter$31.31
 $23.44
 $21.98
 $16.76
$36.94
 $28.61
 $44.19
 $30.42
Third Quarter$26.78
 $23.69
 $21.43
 $17.28
$37.17
 $31.57
 $48.83
 $39.97
Second Quarter$25.13
 $20.36
 $22.98
 $16.53
$34.78
 $28.79
 $43.74
 $33.72
First Quarter$23.86
 $19.02
 $25.00
 $19.06
$30.63
 $23.83
 $35.48
 $29.22

Holders of Record

As of February 20, 2015,17, 2017, there were 6962 holders of record of our common stock. A substantially greater number of holders of our common stock are “street name” or beneficial holders, whose shares are held by banks, brokers and other financial institutions.

Dividends

We have never declared or paid cash dividends on our capital stock. We do not anticipate paying any cash dividends in the foreseeable future. Any future determination to declare cash dividends will be made at the discretion of our board of directors and will depend on our financial condition, operating results, capital requirements, general business conditions and other factors that our board of directors may deem relevant.

Stock Performance Graph

This performance graph shall not be deemed “filed” for purposes of Section 18 of the Exchange Act, or incorporated by reference into any filing of Fortinet under the Securities Act of 1933, as amended (the “Securities Act), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

The following graph shows a comparison from November 18, 2009 through December 31, 2014, ofcompares the cumulative five-year total return for our common stock, the NASDAQ Composite Index and the NASDAQ Computer Index. Such returns are based on historical results and are not intended to suggest future performance. Data for Thethe NASDAQ Composite Index and Thethe NASDAQ Computer Index assume reinvestment of dividends. We have never declared or paid cash dividends on our capital stock, nor do we anticipate paying any such cash dividends in the foreseeable future.


30

Table of Contents

COMPARISON OF CUMULATIVE TOTAL RETURN*
Among Fortinet, Inc., The NASDAQ Composite Index and
The NASDAQ Computer Index

  December 2011 * December 2012 December 2013 December 2014 December 2015 December 2016
Fortinet, Inc. $100
 $96
 $88
 $140
 $143
 $138
NASDAQ Composite $100
 $116
 $160
 $182
 $192
 $207
NASDAQ Computer $100
 $112
 $148
 $178
 $189
 $212

  December 2009 December 2010 December 2011 December 2012 December 2013 December 2014
Fortinet, Inc. $100
 $184
 $248
 $239
 $218
 $349
NASDAQ Composite $100
 $117
 $115
 $133
 $184
 $209
NASDAQ Computer $100
 $117
 $118
 $133
 $175
 $210


_______________________________________
* Assumes that $100 was invested on December 31, 20092011 in stock or index, including reinvestment of dividends. Stockholder returns over the indicated period should not be considered indicative of future stockholder returns.
 
Sales of Unregistered Securities

None.

Purchases of Equity Securities by the Issuer and Affiliated Purchasers

Share Repurchase Program

On December 6, 2013,In January 2016, our board of directors authorizedapproved a new Share Repurchase Program (the “Program”“2016 Repurchase Program”), towhich authorizes the repurchase of up to $200.0 million of our outstanding common stock through December 31, 2014. On2017. In October 17, 2014,2016, our board of directors extendedauthorized the purchase of an additional $100.0 million of shares of our common stock under the 2016 Repurchase Program, increasing our current authorization to $300.0 million through December 31, 2015.2017. Under the 2016 Repurchase Program, share repurchases may be made by us from time to time in privately negotiated transactions or in open market transactions. The 2016 Repurchase Program does not require us to purchase a minimum number of shares, and may be suspended, modified or discontinued at any time without prior notice. In fiscal 2014, we repurchased 1.6 million shares of common stock under the Program in open market transactions for an aggregate purchase price of $38.6 million. The timing and amounts of these purchases were based on market conditions and other factors, including price, and regulatory requirements. The share repurchases were financed by available cash balances. As of December 31, 2014, $122.5 million remained available for future share repurchases under the Program.



31


Table of Contents

The following table provides information with respect to the shares of common stock we repurchased during the three months ended December 31, 20142016 (in thousands, except share and per share amounts):
Period Total Number of Shares Purchased Average Price Paid per Share Total Number of Shares Purchased as Part of Publicly Announced Plan or Program Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs
October 1 - October 31, 2014 178,967
 $24.74
 178,967
 $123,429
November 1 - November 30, 2014 35,000
 $26.71
 35,000
 $122,494
December 1 - December 31, 2014 
 $
 
 $122,494
Period Total Number of Shares Purchased Average Price Paid per Share Total Number of Shares Purchased as Part of Publicly Announced Plan or Program Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs
October 1 - October 31, 2016 578,044
 $31.92
 578,044
 $206,548
November 1 - November 30, 2016 205,455
 $31.87
 205,455
 $200,000
December 1 - December 31, 2016 375,048
 $28.87
 375,048
 $189,172

ITEM 6.     Selected Financial Data

The following selected consolidated financial data set forth below was derived from our historical audited consolidated financial statements and should be read in conjunction with the section titled “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and “Financial Statements and Supplementary Data,” and other financial data included elsewhere in this Annual Report on Form 10-K. Our historical results of operations are not indicative of our future results of operations.

Year Ended December 31,Year Ended December 31,
2014 2013 2012 2011 20102016 2015 2014 2013 2012
(in thousands, except per share amounts)(in thousands, except per share amounts)
Consolidated Statement of Operations Data:                  
Total revenue$770,364
 $615,297
 $533,639
 $433,576
 $324,696
$1,275,443
 $1,009,268
 $770,364
 $615,297
 $533,639
Operating income$59,324
 $72,090
 $100,475
 $88,904
 $55,341
$42,944
 $14,877
 $59,324
 $72,090
 $100,475
Net income$25,343
 $44,273
 $66,836
 $62,492
 $41,245
$32,187
 $7,987
 $25,343
 $44,273
 $66,836
Net income per share :
                  
Basic$0.15
 $0.27
 $0.42
 $0.41
 $0.29
$0.19
 $0.05
 $0.15
 $0.27
 $0.42
Diluted$0.15
 $0.26
 $0.40
 $0.38
 $0.26
$0.18
 $0.05
 $0.15
 $0.26
 $0.40
Weighted-average shares outstanding:                  
Basic163,831
 162,435
 158,074
 152,581
 140,726
172,621
 170,385
 163,831
 162,435
 158,074
Diluted169,289
 168,183
 166,329
 163,781
 156,406
176,338
 176,141
 169,289
 168,183
 166,329

As of December 31,As of December 31,
2014 2013 2012 2011 20102016 2015 2014 2013 2012
(in thousands)
Consolidated Balance Sheet Data:                  
Cash, cash equivalents and investments$991,744
 $843,045
 $739,586
 $538,687
 $387,460
$1,310,508
 $1,164,310
 $991,744
 $843,045
 $739,586
Total assets$1,424,774
 $1,168,464
 $975,497
 $734,747
 $545,422
$2,139,941
 $1,790,510
 $1,424,774
 $1,168,464
 $975,497
Total stockholders’ equity$675,966
 $585,760
 $510,934
 $358,354
 $232,454
$837,681
 $755,377
 $675,966
 $585,760
 $510,934


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ITEM 7.     Management’s Discussion and Analysis of Financial Condition and Results of Operations

In addition to historical information, this Annual Report on Form 10-K contains forward-looking statements within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act. These statements include, among other things, statements concerning our expectations regarding:

continued growth and market share gains;

variability in sales in certain product categories from year to year and between quarters;

expected impact of sales of certain products;products and services;

the impact of macro-economic and geopolitical factors on our international sales;

the proportion of our revenue that consists of our product and service and other revenue, and the mix of billings between products and services;services, and the duration of service contracts;
 
the impact of our product innovation strategy;

drivers of long-term growth and operating leverage, such as increased functionality and value in our standalone and bundled security subscription and support service offerings;

growing our sales to large enterprises,enterprise, service providers,provider and government organizations;organizations, the impact of sales to these organizations on our long-term growth, expansion and operating results, and the effectiveness of our internal sales organization;

trends in revenue, costs of revenue and gross margin;
 
trends in our operating expenses, including personnel costs,sales and marketing expense, research and development expense, sales and marketing expense and general and administrative expense, and expectations regarding these expenses as a percentage of revenue;

continued investments in research and development to strengthen our technology leadership position and the impact of those investments;development;

managing our continued investments in sales and marketing, to drive market share gains and the impact of those investments;

expectations regarding uncertain tax benefits and our effective tax rate;

expectations regarding spending related to real estate and other capital expenditures;

competition in our markets;

integration of acquired companies and technologies and expectations related to acquisitions;

success and expansion of our recently implemented ERP system;

our intentions regarding repatriation of cash, cash equivalents and investments held by our international subsidiaries and the sufficiency of our existing cash, cash equivalents and investments to meet our cash needs for at least the next 12 months;

as well as other statements regarding our future operations, financial condition and prospects and business strategies.strategies; and

adoption of new accounting standards, including those related to revenue recognition and accounting for leases.

These forward-looking statements are subject to certain risks and uncertainties that could cause our actual results to differ materially from those reflected in the forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, those discussed in this Annual Report on Form 10-K and, in particular, the risks

discussed under the heading “Risk Factors” in Part I, Item 1A of this Annual Report on Form 10-K and those discussed in other documents we file with the SEC. We undertake no obligation to revise or publicly release the results of any revision to these forward-looking statements. Given these risks and uncertainties, readers are cautioned not to place undue reliance on such forward-looking statements.

Business Overview

We provide high performance cyber securitycybersecurity solutions to somea wide variety of the largest enterprises, service providers and government organizations of all sizes across the globe, including a majority of the 20142016 Fortune 100. Our cyber securitycybersecurity solutions are fast and secure and designed to provide broad, high-performancerapid protection against dynamic and sophisticated security threats, while simplifying the IT and security infrastructure of our end-customers worldwide.end-customers.

The evolving cyber threat environment is unprecedented both in terms of volume and sophistication of attacks. As a result, cybersecurity has increased both in priority and in management complexity for organizations of all sizes, especially enterprises. In addition, the growth of IoT devices and the decision by organizations to increasingly move computing and infrastructure resources to the cloud necessitate increased visibility and security orchestration across a widely distributed ecosystem of networks. Our common operating system, centralized management and open application program interfaces allow many of the solutions in our portfolio, as well as those of our partner community, to be combined to create an integrated security architecture. The Fortinet Security Fabric is designed to address sophisticated threats and next-generation environments, including IoT and the cloud. The Fortinet Security Fabric connects our products, services and ecosystem partner solutions to help provide visibility and protection at all points in the network, from endpoint to data center to the cloud, regardless of whether deployed in physical, virtual or hybrid cloud environments or on endpoint devices. The Fortinet Security Fabric delivers integrated scalability, access control, awareness, security, traffic segmentation, centralized management and orchestration. The Fortinet Security Fabric is built around an open framework to ensure interoperability and synchronization of intelligence and response, and does so across the distributed network security infrastructure, including both from the cloud and for the cloud. At the core product platform isof the Fortinet Security Fabric are our FortiGate physical and virtual appliance,software licenses, which shipsship with a broad set of broad security services, including firewall, VPN, anti-malware, anti-spam, application control, intrusion prevention, access control, web filtering, traffic and advanced threat protection (“ATP”). Thesedevice segmentation and ATP. Many of these security services are enabledtuned and updated by our FortiGuard Labs team, which provides extensive threat research and a global cloud

33


networkdata collection and intelligence resources to deliver protectionsubscription-based services to each FortiGate appliance. FortiGate also has extensive networking capability such as switching, routing, native internet protocol version 6 (“IPv6”)appliances and different modes of deployment. FortiManager provides central management and FortiAnalyzer provides reporting and analytics. The FortiGate platform can be extended to provide enhanced capabilities. For example, it can be used as a wireless controller for access points. An external sandbox can also be attached for local ATP analysis.software products.

CustomersEnterprise customers select the functions or combination of functionsform and deployment method that best meet their specific security requirements, such as a high-speed DCFW at the network core, a NGFW at the edge, oran internal segmentation firewall (“ISFW”) between network zones, a broad UTM solutiondistributed enterprise firewall at branch sites.sites or software and hardware-based solutions designed for virtualized and cloud environments. Many smaller businesses also tend to deploy UTM devices. We derive a substantial majority of product sales from our FortiGate appliances, which range from the FortiGate-20 to -100 series, designed for small businesses, FortiGate-200 to -800-900 series for mid-sized enterprises,medium-sized businesses, to the FortiGate-1000 to -5000-7000 series for large enterprises and service providers. Our network security platform also includes our FortiGuard security subscription services, which end-customers can subscribe to in order to obtain access to dynamic updates to application control, anti-virus, intrusion prevention, web filtering, and anti-spam functionality. End-customers canmay also choose to purchase FortiCare technical support services for our products. End-customers also often use FortiManager and FortiAnalyzer products in conjunction with a FortiGate deployment to provide enterprise-class centralized management, and analysis and reporting capabilities. FortiSIEM provides organizations with a solution for analyzing and managing network security, performance and compliance standards across our and other vendors’ products. Finally, end-customers may purchase FortiCare technical support services for our products and FortiCare professional services to assist in the design, implementation and maintenance of their networks.

We complement our core FortiGate product line with other appliances and software licenses that offer additional protection from security threats to other critical areas of the enterprise, suchenterprise. These products include our FortiMail email security, FortiSandbox ATP, FortiWeb web application firewall, FortiDDoS, and FortiDB database security appliances, as well as our FortiClient endpoint security software, FortiAP secure wireless access point, advanced threat protection,points and FortiSwitch secure email gateway, web application firewalls, application delivery controllers, databases security product, DDoS security product, and endpoint security product for employee computers and mobile devices. switch connectivity products.

Sales of these complementary products and software licenses have grownoutpaced our overall growth in recent quarters, although these products still represented less than 10%quarters. Our strong technology advantages also position us to effectively deliver security to the cloud and for the cloud. Sales of our total revenue in fiscal 2014.cloud related products and services across public, private and hybrid cloud environments continue to grow faster than other part of our business.




Financial Highlights

We recorded total revenue of $770.4 million$1.28 billion in fiscal 2014,2016, an increase of 25%26% compared to fiscal 2013.2015. Product revenue was $360.6$548.1 million, in 2016, an increase of 30%15% compared to fiscal 2013. Services and other2015. Service revenue was $409.8$727.3 million in fiscal 2014,2016, an increase of 22%37% compared to fiscal 2013.
2015.

Cash, cash equivalents and investments were $991.7 million as of December 31, 2014, an increase of $148.7 million, or 18%, from December 31, 2013
���
Cash, cash equivalents and investments were $1.31 billion as of December 31, 2016, an increase of $146.2 million, or 13%, from December 31, 2015.

Deferred revenue was $558.8 million$1.04 billion as of December 31, 20142016, an increase of $126.1$244.0 million,, or 29%31%, from December 31, 20132015.

We generated cash flows from operating activities of $196.6$345.7 million in fiscal 2014,2016, an increase of $49.2$63.2 million, or 33%22%, compared to fiscal 2013.

We received $20.0 million pursuant to a six-year mutual covenant-not-to-sue and release agreement with Palo Alto Networks, Inc. in January 2014.2015.

We repurchased 1.63.9 million shares of common stock under our previously-announced Share Repurchase Program for an aggregate purchase price of $38.6$110.8 million in fiscal 2014.2016.

Revenue grew in 2016 as a result of our focus on growth and our strategy to increase sales capacity and invest in our marketing activities during fiscal 2014. We also continued to gain traction with several recently introduced FortiGate products, including demand for certain of our high speed, low latency next-generation enterprise data center security products.

During fiscal 2014, we made significant investmentsinvesting in sales and marketing enabled us to increase brand awareness and grow our global sales force and distribution channels to expand our global presence both geographically and by industry segment. We continue to focus on sellinggain market share and customers. Our sales increased in 2016, primarily due to large customers, such asthe strength in sales of our enterprise service providersbundles and government organizations worldwide. Asthe Fortinet Security Fabric. We are also starting to see a result, we had increased salesshift from large enterprises and enterprise data center deployments, with particularproduct revenues to higher-margin, recurring service revenues. On a geographic basis, revenue continues to be diversified globally, which remains a key strength in the telecommunication, technology, government, and financial sectors.

In fiscal 2014, sales of high-end FortiGate products (FortiGate-1000 to -5000 series) increased due to enterprise adoption of our high-end appliances such asbusiness.
The percentage of our FortiGate related billings from mid-range products increased from 25% in 2015 to 28% in 2016 and the FortiGate-1500D and 3700D.entry-level products remained at 34% in 2016, consistent with billings in 2015. The percentage of our FortiGate related billings from high-end products increaseddecreased from 34%41% in fiscal 20132015 to 38% in fiscal 2014, while the mid-range2016. The sale of non-FortiGate products decreased from 29%also grew significantly, such as growth in fiscal 2013 to 26%our FortiSandbox ATP products. We also saw more deals that included multiple Fortinet products in fiscal 2014physical, virtual and the entry-level products decreased from 38% in fiscal 2013 to 36% in fiscal 2014.cloud environments.


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In 2016, operating expenses increased by $187.0 million, or 26%, as compared to 2015. The increase was primarily driven by our investments made to expand our sales coverage, grow our marketing capabilities, develop new products and scale our customer support. We also continue to invest in research and development to strengthen our technology leadership position. We believe that continued product innovation has strengthened our technology and resulted in market share gains, as evidencedgains. In addition, we incurred expenses from business design and reengineering related to the implementation of a new ERP system. Headcount increased by our introduction of the FortiGate-1500D16% to 4,665 employees and -3700D enterprise security appliances.

In fiscal 2014, operating expenses increased 32% compared to fiscal 2013. The increase was primarily driven by our accelerated pace of hiring and marketing investments to support our growth as we continued to invest in expanding our sales coverage, marketing capabilities, developing new products and scaling our customer support organization to meet the needs of our customer base. Headcount, including full time equivalent employees, increased to 2,854contractors as of December 31, 20142016, up from 2,3084,018 as of December 31, 2013.2015.

Business Model

Our sales strategy is based on a distribution model whereby we primarily sell our products, software licenses and services directly to distributors whowhich sell to resellers and service providers, who,which, in turn, sell to our end-customers. In certain cases, we sell directly to government-focused resellers, large service providers and major systems integrators, whowhich have significant purchasing power and unique customer deployment requirements. We also offer our products through Amazon Web Services and Microsoft Azure. While the revenue from such sales are still relatively insignificant, they are rapidly increasing and are aligned with the networking trends of our customers and the industry as a whole.

Typically, FortiGuard security subscription services and FortiCare technical support services are purchased along with our physical products and virtual appliances.software licenses, most frequently as part of a bundle offering that includes hardware and services functionality. We generally invoice at the time of our sale for the total price of the products and subscriptionsecurity and technical support services, and the invoice generally becomesis payable within 30 to 90 days. We also invoice certain software licenses and services on a monthly basis.

We generally recognize product revenue up-front based on the allocated revenue valueup front and deferratably recognize revenue for the sale of new, and the renewal of existing, FortiGuard security subscription and FortiCare technical support services contracts. We recognize revenue for certain software licenses up front as product revenue and, to a lesser extent, recognize other software licenses over the relatedterm of the agreement as services revenue. We recognize the security and support revenue over the service period, which is typically one to three years, from the date the end-customer registers for these services (the date on which the services can first be used by the customer), although itbut can be as long as five years. Sales of new and renewal services are a source of recurring revenue and increase our deferred revenue balance, which contributes significantly to our positive cash flow from operations.


Key Metrics

We monitor a number of financial and liquidity metrics, including the key financial metrics set forth below, in order to help us evaluate growth trends, establish budgets, measure the effectiveness of our sales and marketing efforts, and assess operational efficiencies. The following table summarizes revenue, deferred revenue, billings (non-GAAP), cash, cash equivalents and investments, net cash provided by operating activities, and free cash flow (non-GAAP). We discuss revenue below under “—Components of Operating Results,” and we discuss our cash, cash equivalents, and investments, and net cash provided by operating activities below under “—Liquidity and Capital Resources.” Deferred revenue, billings (non-GAAP), and free cash flow (non-GAAP) are discussed immediately below the following table.

Year Ended or As of December 31,Year Ended or As of December 31,
2014 2013 20122016 2015 2014
(in thousands)(in thousands)
Revenue$770,364
 $615,297
 $533,639
$1,275,443
 $1,009,268
 $770,364
Deferred revenue$558,757
 $432,628
 $363,185
$1,035,349
 $791,303
 $558,757
Increase in deferred revenue$126,129
 $69,443
 $68,352
Billings (non-GAAP)$896,493
 $684,190
 $601,991
$1,515,089
 $1,232,014
 $896,493
Cash, cash equivalents and investments$991,744
 $843,045
 $739,586
$1,310,508
 $1,164,310
 $991,744
Net cash provided by operating activities$196,582
 $147,384
 $183,866
$345,708
 $282,547
 $196,582
Free cash flow (non-GAAP)$164,385
 $133,507
 $161,783
$278,526
 $245,189
 $164,385
    
Deferred revenue. Our deferred revenue consists of amounts that have been invoiced but that have not yet been recognized as revenue. The majority of our deferred revenue balance consists of the unamortizedunrecognized portion of servicesservice revenue from FortiGuard security subscription and FortiCare technical support service contracts.contracts, which is recognized as revenue ratably over the contractual service period. We monitor our deferred revenue balance, growth and the mix of short-term and long-term deferred revenue because it represents a significant portion of revenue to be recognized in future periods. Deferred revenue was $1.04 billion as of December 31, 2016, an increase of $244.0 million, or 31%, from December 31, 2015.

Billings (Non-GAAP).We define billings as revenue recognized during a periodin accordance with GAAP plus the change in deferred revenue from the beginning to the end of the period less any deferred revenue balances acquired from business combinationscombination(s) during the period. We consider billings to be a useful metric for management and investors because deferredbillings drive future revenue, which is impacted by billings, is an important indicator of the health and visibilityviability of our business, and revenue from previously deferred amounts has historically represented a majority of the revenue that we recognize in any particular period.business. There are a number of

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limitations related to the use of billings as opposed to revenue calculated in accordance with GAAP.instead of GAAP revenue. First, billings include amounts that have not yet been recognized as revenue.revenue and are impacted by the term of security and support agreements. Second, we may calculate billings in a manner that is different from peer companies that report similar financial measures. Management compensatesaccounts for these limitations by providing specific information regarding GAAP revenue and evaluating billings together with revenue calculatedGAAP revenue. Total billings were $1.52 billion for 2016, an increase of 23% compared to $1.23 billion in accordance with GAAP. 2015.

A reconciliation of billings to revenue, the most directly comparable financial measure calculated and presented in accordance with GAAP, is provided below:

Year Ended December 31,Year Ended December 31,
2014 2013 20122016 2015 2014
(in thousands)
Billings:          
Revenue$770,364
 $615,297
 $533,639
$1,275,443
 $1,009,268
 $770,364
Increase in deferred revenue126,129
 69,443
 68,352
Add change in deferred revenue244,046
 232,546
 126,129
Less deferred revenue balance acquired in business combination
 (550) 
(4,400) (9,800) 
Total billings (Non-GAAP)$896,493
 $684,190
 $601,991
$1,515,089
 $1,232,014
 $896,493

Free cash flow (Non-GAAP). We define free cash flow as net cash provided by operating activities lessminus capital expenditures.expenditures such as purchases of real estate and other property and equipment. We consider free cash flow to be a liquidity measure that provides useful information to management and investors about the amount of cash generated by the business that, after the acquisition of property and equipment,capital expenditures, can be used for strategic opportunities, including investing in our business, making strategic

acquisitions, repurchasing outstanding common stock and strengthening the balance sheet. Analysis of free cash flow facilitates comparisonsmanagement’s comparison of our operating results to competitors’ operating results.those of our peer companies. A limitation of using free cash flow as opposed torather than the GAAP measure of net cash provided by operating activities as a means for evaluating liquidity is that free cash flow does not represent the total increase or decrease in the cash, cash equivalents and investments balancesbalance for the period because it excludes cash used for capital expenditures and cash provided by or used for other investing and financing activities. We compensateManagement accounts for this limitation by providing information about our capital expenditures and other investing and financing activities on the face of the cash flow statement and under “—Liquidity and Capital Resources.” A reconciliation of free cash flow to net cash provided by operating activities, the most directly comparable financial measure calculated and presented in accordance with GAAP, is provided below:

Year Ended December 31,Year Ended December 31,
2014 2013 20122016 2015 2014
(in thousands)
Free Cash Flow:          
Net cash provided by operating activities$196,582
 $147,384
 $183,866
$345,708
 $282,547
 $196,582
Less purchases of property and equipment(32,197) (13,877) (22,083)(67,182) (37,358) (32,197)
Free cash flow (Non-GAAP)$164,385
 $133,507
 $161,783
$278,526
 $245,189
 $164,385

Components of Operating Results

Revenue

We generate the majority of our revenue from sales of our products, software licenses and amortization of amounts included in deferred revenue related to previous sales of FortiGuard security subscription and FortiCare technical support services. Revenue is recognized when persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the sales price is fixed or determinable and collectability is reasonably assured.

Our total revenue is comprised of the following:
 
Product revenue. Product revenue is primarily generated from sales of our appliances. The substantial majority of our product revenue has been generated by our FortiGate line of appliances, and we do not expect this to change in the foreseeable future. Product revenue also includes revenue derived from sales of FortiManager, FortiAnalyzer, FortiSwitch, FortiMail, FortiDB, FortiWeb, FortiAP, FortiScan, FortiCarrier, FortiBalancer, FortiCache, FortiVoice, FortiBridge, FortiDDoS, FortiDNS, FortiSandbox, FortiADC, and FortiAuthenticator appliances, and our FortiClient and virtual domain, or VDOM, software. For arrangements which include end-customer acceptance criteria, revenue is recognized upon acceptance. We recognize product revenue on sales to distributors that have no general right of return and direct sales to end-customers upon shipment, once all other revenue recognition criteria have been met. Certain distributors that stock our products are

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granted stock rotation rights, limited rights of return, as well as rebates for sales of our products. The arrangement fee for this group of distributors is not fixed and determinable when products are shipped and revenue is therefore deferred and recognized upon sell-through. As a percentage of total revenue, we expect that our product revenue may vary from quarter-to-quarter based on seasonal and cyclical factors, as discussed below under “—Quarterly Results of Operations” but generally may remain at relatively comparable levels , as services revenue becomes a larger portion of our business as our customers renew existing services contracts and we expand our customer base.expect the trend to continue in 2017.


ServicesService revenue. ServicesService revenue is generated primarily from FortiGuard security subscription services related to application control, antivirus, intrusion prevention, web filtering, anti-spam, ATP and vulnerability management updates, and from FortiCare technical support services for software updates, maintenance releases and patches, Internet access to technical content, telephone and Internet access to technical support personnel and hardware support, and FortiGuard security subscription services related to application control, antivirus, intrusion prevention, web filtering, anti-spam and vulnerability management updates.support. We recognize revenue from FortiGuard security subscription and FortiCare technical support services over the contractual service performance period. Our typical contractual support and subscription term is one to three years. We also generate a small portion of our revenue from professional services and training services, andfor which we recognize this revenue as the services are provided. Asprovided, and cloud-based services, for which we recognize revenue as the subscription service is delivered over the term, which is typically one year, or on a percentagemonthly usage basis. We are also starting to see a shift from product revenues to higher-margin, recurring service revenues, which reflects our ongoing success in driving sales of total revenue, we expect our services revenue to remain at comparable levels or increaselow-end and high-end service bundles, as our customers renew existingwell as increases in certain software sales and time based service contracts and we expand our customer base.models. Our servicesservice revenue growth rate depends significantly on the growth of our customer base, the expansion of our service bundle offerings, the expansion and introduction of new service offerings and the renewal of service contracts by our existing customers.

Beginning in fiscal 2014, we combined ratable and other revenue with services revenue to present the combined amounts as services and other revenue in the consolidated statements of operations. The related cost of revenue and gross profit have also been combined to conform to the current period presentation. Ratable and other revenue is not material and is not expected to become material in the future.

Our total cost of revenue is comprised of the following:

Cost of product revenue. A substantial majority of the cost of product revenue consists of third-party contract manufacturers' costs, as well as other costs of materials used in production, as well as costs paid to our third-party contract manufacturers.production. Our cost of product revenue also includes supplies, shipping costs, personnel costs associated with logistics and quality control, warranty costs, facility-related

costs, excess and obsolete inventory costs, warranty costs, and amortization and impairment of intangible assets, if applicable. Personnel costs include salaries, benefits and bonuses, as well as stock-based compensation.

Cost of servicesservice revenue. Cost of servicesservice revenue is primarily comprised of salaries, benefits and bonuses, as well as stock-based compensation associated with our FortiGuard Labs and our FortiCare technical support teams.compensation. Cost of service revenue also includes replacement productssupplies and supplies, facility-related costs, including depreciation expense, and professional services and training teams. We expect our cost of services revenue will increase slightly as a percentage of revenue as we continue to invest in FortiGuard security subscription and FortiCare technical support services to meet the needs of our customer base and service levels expected by our enterprise customers.costs.

Gross profitmargin. Gross profit as a percentage of revenue, or gross margin, has been and will continue to be affected by a variety of factors, including the average sales price of our products, any excess inventory write-offs, product costs, the mix of products sold and the mix of revenue between products, software licenses and services. We believe our overall gross margin for the near term will remain at levels comparable or slightly lower to that achieved in fiscal 2014.

ServicesService revenue hasand software licenses have had a positive effect on our total gross margin given the higher services gross margins compared to product gross margins. During fiscal 2014 service2016, product gross margin was positively impacted by higher sales of software products, as well as inventory management and warehouse efficiencies. Service gross margins remained relatively consistentcomparable in 2016 compared to fiscal 2013.2015. We believe our overall gross margin will remain at a relatively comparable level in 2017.

 Operating expenses. Our operating expenses consist of research and development, sales and marketing, and general and administrative expenses.expenses, and restructuring charges. Personnel costs are the most significant component of operating expenses and consist primarily of salaries, benefits, bonuses, stock-based compensation, and sales commissions, and stock-based compensation.as applicable. We expect personnel costs to continue to increase in absolute dollars as we hire new employees.expand our workforce.

Research and development. Research and development expense consists primarily of salaries, benefits and bonuses, as well as stock-based compensation.personnel costs. Additional research and development expenses include ASIC and system prototypes and certification-related expenses, depreciation of capital equipment and facility-

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relatedfacility-related expenses. The majority of our research and development is focused on both software development and the ongoing development of our hardware platform. We record all research and development expenses as incurred. Our research and development teams are primarily located in Canada and the United States.U.S.

Sales and marketing. Sales and marketing expense is the largest component of our operating expenses and primarily consists of salaries, benefits, bonuses and commissions, as well as stock-based compensation.personnel costs. Additional sales and marketing expenses include promotional lead generation and other marketing expenses, travel, depreciation of capital equipment and facility-related expenses. We intend to hire additional personnel focused on sales and marketing and expand our sales and marketing efforts worldwide in order to capture additional market share in the high-return enterprise market, where customers tend to provide a higher lifetime value.

General and administrative. General and administrative expense consists of salaries, benefits and bonuses, as well as stock-based compensation,personnel costs, as well as professional fees, depreciation of capital equipment and software, facility-related expenses, expenses associated with the ERP system implementation and facility-related expenses.business acquisition costs. General and administrative personnel include our executive, finance, human resources, information technology and legal organizations. Our professional fees principally consist of outside legal, auditing, accounting, tax, information technology and other consulting costs.

Restructuring charges. Restructuring charges relate to alignment activities performed in connection with the Meru and AccelOps acquisitions to reduce our cost structure and improve operational efficiencies, resulting in workforce reductions, contract terminations and other charges.

Interest income. Interest income consists of income earned on our cash, cash equivalents and investments. We have historically invested our cash in money market funds, commercial paper, corporate debt securities, municipal bonds, certificates of deposit and term deposits, andcommercial paper, U.S. government and agency debt securities.securities, municipal bonds, money market funds and certificates of deposit.

Other expensenet. Other expense, expense—net consists primarily of foreign exchange and related hedging gains and losses. Foreign exchange gains and losses relate to foreign currency exchange re-measurement. The hedging gains and losses are related to our settled balance sheet hedges.remeasurement.

Provision for income taxes. We are subject to tax in the United StatesU.S., as well as other tax jurisdictions or countries in which we conduct business. Earnings from our non-U.S. activities are subject to income taxes in the local country which are generally lower than U.S. tax rates, and may be subject to U.S. income taxes. Our effective tax rate differs from the U.S. statutory rate primarily due to foreign income subject to different tax rates than the U.S., research and development tax credits, withholding taxes and nondeductible stock-based compensation expense and adjustments related to our intercompany transfer pricing.expense.


The income tax provision for fiscal 20142016 was comprised primarily of domestic income taxes, foreign income taxes and foreign withholding taxes, and income tax reserves.taxes. Our effective tax rate approximates the U.S. federal statutory tax rates plus the impact of state taxes, excess tax benefits related to stock-based compensation expense, research and development tax credits, (when applicable), foreign withholding tax, nondeductible stock-based compensation expense, and foreign income subject to lower tax rates than income earned in the U.S., and adjustments related to intercompany transfer pricing.

Critical Accounting Policies and Estimates

Our discussion and analysis of our financial condition and results of operations are based upon our financial statements, which have been prepared in accordance with GAAP. These principles require us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenue, cost of revenue and expenses, and related disclosures. Our estimates include those related to revenue recognition, stock-based compensation expense, valuation of inventory, warranty liabilities, investments, goodwill and other long-lived assets and accounting for income taxes. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances. To the extent that there are material differences between these estimates and our actual results, our future financial statements will be affected.

We believe that, of ourthe significant accounting policies which are described in Note 1 to our consolidated financial statements included in Part II, Item 8 of this Annual Report on Form 10-K, the following accounting policies involve a greater degree of judgment and complexity. Accordingly, we believe these are the most critical to fully understand and evaluate our financial condition and results of operations.

Revenue Recognition

We derive the majority of our revenue from sales of our hardware, software, FortiGuard security subscription services and FortiCare technical support services, and other services through our channel partners and a direct sales force.


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Revenue is recognized when all of the following criteria have been met:
 
Persuasive evidence of an arrangement exists. Binding contracts or purchase orders are generally used to determine the existence of an arrangement.
 
Delivery has occurred or services have been rendered. DeliveryProduct delivery occurs when we fulfill an order and title and risk of loss has been transferred. ServicesSoftware license delivery occurs upon electronic transfer of the license key to the customer. Service revenue is deferred and recognized ratably over the contractcontractual service period, which is typically from one to three years and, to a lesser extent, up to five years, and is generally recognized upon delivery or completion of service.
 
Sales price is fixed or determinable. We assess whether the sales price is fixed or determinable based on the payment terms associated with the transaction and when the sales price is deemed final.

Collectability is reasonably assured. We assess collectability based primarily on creditworthiness as determined by credit checks, analysis, and payment history.

We recognize product revenue for sales to distributors that have no general right of return and direct sales to end-customers upon shipment, based on general revenue recognition accounting guidance once all other revenue recognition criteria have been met. Certain distributors are granted stock rotation rights, limited rights of return as well asand rebates for sales of our products. The arrangement fee for this group of distributors is not typically fixed or determinable when products are shipped and revenue is therefore deferred and recognized upon sell-through. For sales that include end-customer acceptance criteria, revenue is recognized upon acceptance. We recognize software license revenue upon delivery. Historically, software license revenue has not been material.

 Substantially all of our products have been sold in combination with services, which consist of security subscriptions and technical support services. Security services provide access to our antivirus, intrusion prevention, web filtering, and anti-spam functionality. Support services include rights to unspecified software upgrades, maintenance releases and patches, telephone and Internet access to technical support personnel, and hardware support.

Service revenue consists of sales from our FortiGuard security subscription and FortiCare technical support services, professional and training services and other services that include software as a service (“SaaS”) and infrastructure as a service (“IaaS”), both of which are hosted or cloud-based services. We recognize revenue from these services ratably overarrangements as the contractualsubscription service period. Revenue related to subsequent renewals of these services are recognizedis delivered over the term, which is typically one year, or on a monthly usage basis.  To date, SaaS and IaaS revenues have not represented a significant percentage of the renewal agreement.our total revenue.

We offer certain sales incentives to channel partners. We reduce revenue for estimates of sales returns and allowances and record reductions to revenue for rebates and estimated commitments related to price protection and other customer incentive programs. Additionally, in limited circumstances, we may permit end-customers, distributors and resellers to return our products, subject to varying limitations, for a refund within a reasonably short period from the date of purchase. We estimate and record reserves for sales incentives and sales returns based on historical experience.

Our sales arrangements typically contain multiple elements, such as hardware, security subscription, technical support services and other services. The majority of our hardware appliance products contain our operating system software that together function to deliver the essential functionality of the product. Our products and services generally qualify as separate units of accounting. We allocate revenue to each unit of accounting based on an estimated selling price using vendor-specific objective evidence (“VSOE”) of selling price, if it exists, or third-party evidence (“TPE”) of selling price. If neither VSOE nor TPE of selling price existexists for a deliverable, we use our best estimate of selling price (“BESP”) for that deliverable. Revenue allocated to each element is then recognized when the basic revenue recognition criteria are met for each element.
     
For our hardware appliances, we use BESP as our selling price estimate. For our support and other services, we generally use VSOE as our selling price estimate. We determine VSOE of fair value for elements of an arrangement based on the historical pricing and discounting practices for those services when sold separately. In establishing VSOE, we require that a substantial majority of the selling prices for a service fall within a reasonably narrow pricing range, generally evidenced by a substantial majority of such historical stand-alone transactions falling within a reasonably narrow range as a percentage of list price. We are typically not able to determine TPE for our products or services. TPE is determined based on competitor prices for similar deliverables when sold separately, which is generally unavailable. For our hardware appliances, we use BESP as our selling price. For our support and other services, we generally use VSOE as our selling price estimate. When we are unable to establish a selling price using VSOE for our support and other services, we use BESP in our allocation of arrangement consideration. We determine BESP for a product or service by considering multiple historical factors including, but not limited to, cost of products, gross margin objectives, pricing practices, geographies, customer classes and distribution channels that fall within a reasonably narrow range as a percentage of list price.

For multiple-element arrangements where software deliverables are included, revenue is allocated to the non-software deliverables and to the software deliverables as a group using the relative estimated selling prices of each of the deliverables in

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the arrangement based on the estimated selling price hierarchy. The amount allocated to the software deliverables is then allocated to each software deliverable using the residual method when VSOE of fair value exists. If evidence of VSOE of fair value of one or more undelivered elements does not exist, all software allocated revenue is deferred and recognized when delivery of those elements occurs or when fair value can be established. When the undelivered element for which we do not have VSOE of fair value is support, revenue for the entire arrangement is recognized ratably over the support period. The same residual method and VSOE of fair value principles apply for our multiple element arrangements that contain only software elements.

We currently are evaluating the impact of the new standard related to revenue recognition, and we may incur significant costs to adopt and to comply with this new pronouncement. See Note 1 to our consolidated financial statements in Part II, Item 8 of this Annual Report on Form 10-K for further discussion.

Stock-Based Compensation Expense

EmployeesEmployee Stock Options. We estimate the fair value of employee stock options awarded to our employees using the Black-Scholes-Merton (“Black-Scholes”) pricing model. For all employee stock options, we recognize expense net of estimated forfeitures, over the requisite service period using the straight-line method. Our option pricing model requires the input of subjective assumptions, including the expected stock price volatility, expected term, risk-free interest rates and forfeiture rate.expected dividend yield of our common stock. The assumptions used in our option pricing model represent management’s best estimates. These estimates involve inherent uncertainties and the application of management’s judgment. During fiscal 2014, stock options granted to employees were not significant. A 10% change in any of these assumptions would not have a significant impact on our stock-based compensation expense.

Employee Stock Purchase Plan. We estimate the fair value of the rights to acquire stock under our employee stock purchase plan (“ESPP”) using the Black-Scholes pricing model and is amortize the fair valuewe recognize expense over the requisite service period using the straight-line method. The pricing model requires the input of the fair value of our common stock and subjective assumptions, including the expected term of the award, the expected volatility of the price of our common stock, risk-free interest rates and the expected dividend yield of our common stock. Our ESPP provides for consecutive six-month offering periods and we use our own historical volatility data in the valuation of ESPP shares. A 10% change in any of these assumptions would not have a materialsignificant impact on our stock-based compensation expense.

Restricted Stock Units. We account for the fair value of restricted stock units (“RSUs”) awarded to employees and members of our board of directors using the closing market price of our common stock on the date of grant. RSUs are payable in shares of our common stock as the periodic vesting requirements are satisfied. RSUs generally vest over a four-year period if the employees, contractors, or directors, as applicable, remain with us for the duration of the vesting period. For all RSUs, we recognize expense, net of estimated forfeitures, over the requisite service period using the straight-line method.

Performance Stock Units. Performance Stock Units (“PSUs”) are RSUs that contain both service-based and market-based vesting conditions. PSUs vest over a specified service period upon the satisfaction of certain market-based vesting conditions, and settle into shares of our common stock upon vesting over a two- or three-year period. The fair value of a PSU is calculated using the Monte Carlo simulation model on the date of grant and is based on the market price of our common stock on the date of grant modified to reflect the impact of the market-based vesting condition, including the estimated payout level based on that condition. We do not adjust compensation cost for subsequent changes in the expected outcome of the market-based vesting conditions.

Valuation of Inventory

Inventory is recorded at the lower of cost (using the first-in, first-out method) or market, after we give appropriate consideration to obsolescence and inventory in excess of anticipated future demand. In assessing the ultimate recoverability of inventory, we make estimates regarding future customer demand, the timing of new product introductions, economic trends and market conditions. If the actual product demand is significantly lower than forecasted, we could be required to record additional inventory write-downs which would be charged to cost of product revenue. Any write-downs could have an adverse impact on our gross margins and profitability.

Business Combinations

We include the results of operations of the businesses that we acquire as of the respective dates of acquisition. We allocate the fair value of the purchase price of our business acquisitions to the tangible assets acquired, liabilities assumed, and intangible assets acquired, based on their estimated fair values. The excess of the purchase price over the fair values of these identifiable assets and liabilities is recorded as goodwill. We often continue to gather additional information throughout the measurement period, and if we make changes to the amounts recorded, such charges are recorded in the period in which they are identified.

Restructuring

Our restructuring expenses consist of severance and other one-time benefits, contract terminations and other expenses. Liabilities for costs associated with a restructuring activity are measured at fair value. One-time termination benefits are expensed at the date we notify the employee, unless the employee must provide future service, in which case the benefits are expensed ratably over the future service period. A liability for terminating a contract before the end of its term, which termination is usually done by giving written notice to the counterparty within the notification period specified by the contract or by otherwise negotiating a termination with the counterparty, is recognized at fair value on the notification date. A liability for costs that will continue to be incurred under a contract for its remaining term without economic benefit to the entity is recognized at the cease-use date. Other costs primarily consist of asset write-offs, which are expensed when incurred.

We continually evaluate the adequacy of the remaining liabilities under our restructuring initiatives. Although we believe that these estimates accurately reflect the costs of our restructuring plan, actual results may differ and thereby require us to record an additional provision or reverse a portion of such a provision.

Accounting for Income Taxes

We record income taxes using the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been recognized in our financial statements or tax returns. In estimatingaddition, deferred tax assets are recorded for the future benefit of utilizing net operating losses and research and development credit carryforwards. Deferred tax consequences, generally allassets and liabilities are measured using the currently enacted tax rates that apply to taxable income in effect for the years in which those tax assets and liabilities are expected future events other than enactmentsto be realized or changes in the tax law or rates are considered.settled. Valuation allowances are provided when necessary to reduce deferred tax assets to the amount expected to be realized.


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We operate in variousrecognize tax jurisdictions and are subject to audit by variousbenefits from an uncertain tax authorities. We provide for tax contingencies wheneverposition only if it is deemed more likely than not, that a tax asset has been impaired or a tax liability has been incurred for events such as tax claims or changes in tax laws. Tax contingencies are based upon theiron the technical merits relevant tax law andof the specific facts and circumstances as of each reporting period. Changes in facts and circumstances could result in material changes toposition that the amounts recorded for such tax contingencies.

We account for uncertain tax positions in accordance with GAAP, which defines the confidence level that a tax position must meet in order towill be sustained on examination by the taxing authorities. The tax benefits recognized in the financial statements. The tax effectsstatements from such positions are then measured based on the largest benefit that has a greater than 50% likelihood of a position are recognized only if it is “more likely than not” to be sustained based solely on its technical merits as of the reporting date. We consider many factors when evaluating and estimating our tax positions and tax benefits, which may require periodic adjustments and which may not accurately anticipate actual outcomes.being realized upon ultimate settlement.

As part of the process of preparing our consolidated financial statements, we are required to estimate our taxes in each of the jurisdictions in which we operate. We estimate actual current tax exposure together with assessing temporary differences resulting from differing treatment of items, such as accruals and allowances not currently deductible for tax purposes. These differences result in deferred tax assets, which are included in our consolidated balance sheets. In general, deferred tax assets represent future tax benefits to be received when certain expenses previously recognized in our consolidated statements of operations become deductible expenses under applicable income tax laws, or loss or credit carryforwards are utilized.

In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. We continue to assess the need for a valuation allowance on the deferred tax assets by evaluating both positive and negative evidence that may

exist. Any adjustment to the net deferred tax asset valuation allowance would be recorded in the income statementconsolidated statements of operations for the period that the adjustment is determined to be required.

We make estimates and judgments about our future taxable income that are based on assumptions that are consistent with our plans and estimates. Should the actual amounts differ from our estimates, the amount of our tax expense and liabilities could be materially impacted.


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Results of Operations

The following tables set forth our results of operations for the periods presented and as a percentage of our total revenue for those periods. The period-to-period comparison of financial results is not necessarily indicative of financial results to be achieved in future periods.

Year Ended December 31,Year Ended December 31,
2014 2013 20122016 2015 2014
(in thousands)(in thousands)
Consolidated Statement of Operations Data:          
Revenue:          
Product$360,558
 $278,046
 $248,948
$548,110
 $476,782
 $360,558
Services and other409,806
 337,251
 284,691
Service727,333
 532,486
 409,806
Total revenue770,364
 615,297
 533,639
1,275,443
 1,009,268
 770,364
Cost of revenue:          
Product151,300
 114,611
 93,971
208,984
 190,398
 151,300
Services and other79,709
 66,032
 53,449
Service128,853
 96,379
 79,709
Total cost of revenue231,009
 180,643
 147,420
337,837
 286,777
 231,009
Gross profit:          
Product209,258
 163,435
 154,977
339,126
 286,384
 209,258
Services and other330,097
 271,219
 231,242
Service598,480
 436,107
 330,097
Total gross profit539,355
 434,654
 386,219
937,606
 722,491
 539,355
Operating expenses:          
Research and development122,880
 102,660
 81,078
183,084
 158,129
 122,880
Sales and marketing315,804
 224,991
 179,155
626,501
 470,371
 315,804
General and administrative41,347
 34,913
 25,511
81,080
 71,514
 41,347
Restructuring charges3,997
 7,600
 
Total operating expenses480,031
 362,564
 285,744
894,662
 707,614
 480,031
Operating income59,324
 72,090
 100,475
42,944
 14,877
 59,324
Interest income5,393
 5,306
 5,006
7,303
 5,295
 5,393
Other expense—net(3,168) (1,455) (485)(7,099) (3,167) (3,168)
Income before income taxes61,549
 75,941
 104,996
43,148
 17,005
 61,549
Provision for income taxes36,206
 31,668
 38,160
10,961
 9,018
 36,206
Net income$25,343
 $44,273
 $66,836
$32,187
 $7,987
 $25,343



42


Year Ended December 31,Year Ended December 31,
2014 2013 20122016 2015 2014
(as percentage of total revenue)
Revenue:          
Product47 % 45 % 47 %43 % 47 % 47 %
Services and other53
 55
 53
Service57
 53
 53
Total revenue100
 100
 100
100
 100
 100
Cost of revenue:          
Product20
 19
 18
16
 19
 20
Services and other10
 11
 10
Service10
 10
 10
Total cost of revenue30
 29
 28
26
 28
 30
Gross profit:          
Product58
 59
 62
62
 60
 58
Services and other81
 80
 81
Total gross profit70
 71
 72
Service82
 82
 81
Total gross margin74
 72
 70
Operating expenses:          
Research and development16
 17
 15
14
 16
 16
Sales and marketing41
 36
 33
49
 47
 41
General and administrative5
 6
 5
6
 7
 5
Restructuring charges0.3
 1
 
Total operating expenses62
 59
 53
70
 70
 62
Operating income8
 12
 19
Operating margin3
 1
 8
Interest income1
 
 1
1
 1
 1
Other expense—net
 
 
(1) 
 
Income before income taxes8
 12
 20
3
 2
 8
Provision for income taxes5
 5
 7
1
 1
 5
Net income3 % 7 % 13 %3 % 1 % 3 %

Fiscal Years 20142016 and 20132015

Revenue

 Year Ended December 31,    
2016 2015    
Amount 
% of
Revenue
 Amount 
% of
Revenue
 Change % Change
(in thousands, except percentages)
Revenue:           
Product$548,110
 43% $476,782
 47% $71,328
 15%
Service727,333
 57
 532,486
 53
 194,847
 37
Total revenue$1,275,443
 100% $1,009,268
 100% $266,175
 26%
Revenue by geography:           
Americas$536,706
 42% $435,282
 43% $101,424
 23%
Europe, Middle East and Africa (“EMEA”)477,393
 37
 366,018
 36
 111,375
 30
Asia Pacific (“APAC”)261,344
 21
 207,968
 21
 53,376
 26
Total revenue$1,275,443
 100% $1,009,268
 100% $266,175
 26%

Total revenue increased by $266.2 million, or 26%, in 2016 compared to 2015. We continued to experience global diversification of revenue in 2016. Revenue from all our regions grew, with EMEA contributing the largest portion of our revenue growth both on an absolute dollar and on a percentage basis. Product revenue increased by $71.3 million, or 15%, in

2016 compared to 2015. The increase in product revenue was primarily driven by greater sales volume in our FortiGate product family across all product categories and in particular for our high-end and mid-range products for large enterprise customers. Sales of non-FortiGate products, such as FortiSandbox, also grew significantly. Service revenue increased by $194.8 million, or 37%, in 2016 compared to 2015. The increase in service revenue was primarily due to the recognition of revenue from our growing deferred revenue balance consisting of FortiGuard security subscription and FortiCare technical support contracts sold to a larger customer base, as well as the renewals of similar contracts sold in earlier periods. We are also starting to see a shift from product revenues to higher-margin, recurring service revenues, which reflect our ongoing success in driving sales of low-end and high-end service bundles.

Cost of revenue and gross margin
 Year Ended December 31,    
2016 2015 Change % Change
(in thousands, except percentages)
Cost of revenue:       
Product$208,984
 $190,398
 $18,586
 10%
Service128,853
 96,379
 32,474
 34
Total cost of revenue$337,837
 $286,777
 $51,060
 18%
Gross margin:       
Product61.9% 60.1% 1.8%  
Service82.3
 81.9
 0.4
  
Total gross margin73.5% 71.6% 1.9%  

Total gross margin increased by 1.9 percentage points in 2016 compared to 2015, as both product and service gross margins increased. Product gross margin increased by 1.8 percentage points in 2016 compared to 2015. Product gross margin was positively impacted by higher sales of software products such as certain of our virtualized security solutions and by lower warranty related costs, and was partially offset by higher inventory reserves.

Service gross margin increased during 2016 as compared to 2015, as we scaled efficiencies resulting from an increased mix on higher-margin service revenue. Cost of service revenue increased by $32.5 million, and was comprised primarily of personnel costs.

Operating expenses
 Year Ended December 31, Change % Change
2016 2015 
Amount 
% of
Revenue
 Amount 
% of
Revenue
 
(in thousands, except percentages)
Operating expenses:           
Research and development$183,084
 14% $158,129
 16% $24,955
 16 %
Sales and marketing626,501
 49
 470,371
 47
 156,130
 33
General and administrative81,080
 6
 71,514
 7
 9,566
 13
Restructuring charges3,997
 0.3
 7,600
 1
 (3,603) (47)
Total operating expenses$894,662
 70% $707,614
 70% $187,048
 26 %

Research and development

Research and development expense increased by $25.0 million, or 16%, in 2016 compared to 2015, primarily due to an increase of $19.0 million in personnel costs as a result of increased headcount to support the development of new products and continued enhancements of our existing products. Depreciation and other occupancy-related costs increased by $6.6 million. We intend to continue to invest in our research and development organization, but expect research and development expense as a percentage of total revenue to remain at a relatively comparable level in 2017.


Sales and marketing

Sales and marketing expense increased by $156.1 million, or 33%, in 2016 compared to 2015, primarily due to an increase of $122.3 million in personnel costs as we continued to increase our sales and marketing headcount in order to drive continued market share gains globally. In addition, depreciation expense and other occupancy-related expense increased by $14.0 million, and travel and entertainment expense increased by $8.1 million. Marketing-related expense increased by $7.6 million as we invested significantly in marketing programs to capture market share, particularly in the large enterprise market, including costs related to trade shows and lead generation. As a percentage of total revenue, sales and marketing expense increased as we accelerated the investment in our sales force and marketing programs to drive future growth. We intend to continue to make investments in our sales resources and infrastructure and marketing strategy, which are critical to support growth, but expect sales and marketing expense as a percentage of total revenue to decline in 2017.

General and administrative

General and administrative expense increased by $9.6 million, or 13%, in 2016 compared to 2015. Personnel costs increased by $9.6 million as we continued to increase headcount in order to support our expanding business and ERP implementation. During 2016, we expensed $7.8 million of third-party costs relating to the implementation and maintenance of the ERP system implementation compared to $5.4 million in 2015. These increases were partially offset by lower professional fees of $6.7 million in 2016. As a percentage of total revenue, we expect general and administrative expense to increase compared to 2016 as we continue to expand our ERP capabilities and implement the new revenue recognition standard.
Restructuring

Restructuring expenses of $4.0 million in 2016 primarily relate to our restructuring activities to improve operating efficiencies due to the acquisition of AccelOps and certain other activities. Restructuring charges of $7.6 million during 2015 relate to restructuring activities in connection with the Meru acquisition. See Note 9 to the consolidated financial statements for additional details, including the types of expenses incurred and cash payments made. See also the “Liquidity and Capital Resources” section of this Part II, Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

Interest income and other expensenet
 Year Ended December 31,    
2016 2015 Change % Change
(in thousands, except percentages)
Interest income$7,303
 $5,295
 $2,008
 38%
Other expense—net(7,099) (3,167) (3,932) 124

Interest income increased in 2016 as compared to 2015, primarily due to interest earned on invested balances of cash, cash equivalents and investments. Interest income varies depending on our average investment balances during the period, types and mix of investments, and market interest rates. The increase in other expense—net in 2016 as compared to 2015 was the result of higher foreign currency exchange losses.

Provision for income taxes
 Year Ended December 31, Change % Change
2016 2015 
(in thousands, except percentages)
Provision for income taxes$10,961
 $9,018
 $1,943
 22%
Effective tax rate (%)25% 53% (28)% 
Our effective tax rate was 25% for 2016, compared with an effective tax rate of 53% for 2015. The provision for income taxes for 2016 was comprised primarily of U.S. federal and state taxes, other foreign income taxes, foreign withholding taxes, an increase in tax reserves, as well as transfer pricing allocations that impact jurisdictional income taxed at various tax rates. The decrease in the effective tax rate in 2016 was primarily due to the recognition of excess tax benefits for income tax provision from the adoption of ASU 2016-09. In 2016, due to the early adoption of ASU 2016-09, approximately $10.8 million

of excess tax benefits were recognized in the income tax provision. In 2015, there were no excess tax benefits included in the income tax provision.

It is our policy to classify accrued interest and penalties related to unrecognized tax benefits in the provision for income taxes. As of December 31, 2016, we had accrued $9.5 million for estimated interest related to uncertain tax provisions compared to an accrual of $5.5 million as of December 31, 2015.

Within the next twelve months, we do not believe there will be a decrease in uncertain tax benefits that could significantly impact our effective tax rate.

2015 and 2014

Revenue
 
Year Ended December 31,    Year Ended December 31, Change % Change
2014 2013    2015 2014 
Amount 
% of
Revenue
 Amount 
% of
Revenue
 Change % ChangeAmount 
% of
Revenue
 Amount 
% of
Revenue
 
(in thousands, except percentages)
Revenue:                      
Product$360,558
 47% $278,046
 45% $82,512
 30%$476,782
 47% $360,558
 47% $116,224
 32%
Services and other409,806
 53
 337,251
 55
 72,555
 22
Service532,486
 53
 409,806
 53
 122,680
 30
Total revenue$770,364
 100% 615,297
 100% $155,067
 25%$1,009,268
 100% $770,364
 100% $238,904
 31%
Revenue by geography:                      
Americas$324,659
 42% $252,786
 41% $71,873
 28%$435,282
 43% $324,659
 42% $110,623
 34%
Europe, Middle East and Africa (“EMEA”)270,537
 35
 208,979
 34
 61,558
 29
Asia Pacific and Japan (“APAC”)175,168
 23
 153,532
 25
 21,636
 14
EMEA366,018
 36
 270,537
 35
 95,481
 35
APAC207,968
 21
 175,168
 23
 32,800
 19
Total revenue$770,364
 100% $615,297
 100% $155,067
 25%$1,009,268
 100% $770,364
 100% $238,904
 31%

Total revenue increased by $155.1$238.9 million, or 25%31%, in fiscal 20142015 compared to fiscal 2013.2014. Total revenue in 2015 of $1.01 billion included Meru’s revenue from July 8, 2015 to December 31, 2015 of $28.1 million, or 3% of total revenue.  Excluding Meru’s revenue, our revenue was $981.2 million, an increase of 27% compared to the same period last year. We continued to experience global diversification of revenue in 2015. The Americas region contributed the largest portion of our revenue growth on an absolute dollar basis and all three regions showed growth on a percentage basis. Product revenue increased by $82.5$116.2 million, or 30%32%, in 2015 compared to fiscal 2013.2014. The increase in product

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revenue was primarily driven by greater sales volume in our FortiGate product due to increased demand forfamily across all product categories, particularly in our high-end products fromfor large enterprise and service provider customers.

Services and otherService revenue increased by $72.6$122.7 million, or 22%30%, in fiscal 20142015 compared to fiscal 20132014. The increase in service revenue was primarily due to the recognition of revenue from our growing deferred revenue balance consisting of FortiGuard security subscription and FortiCare technical support contracts sold to a larger customer base, as well as the renewals of similar contracts sold in earlier periods.


Cost of revenue and gross margin
 
Year Ended December 31,    Year Ended December 31, Change % Change
2014 2013 Change % Change2015 2014 
(in thousands, except percentages)
Cost of revenue:              
Product$151,300
 $114,611
 $36,689
 32%$190,398
 $151,300
 $39,098
 26%
Services and other79,709
 66,032
 13,677
 21
Service96,379
 79,709
 16,670
 21
Total cost of revenue$231,009
 $180,643
 $50,366
 28%$286,777
 $231,009
 $55,768
 24%
Gross margin (%):              
Product58.0% 58.8% (0.8)%  60.1% 58.0% 2.1%  
Services and other80.5
 80.4
 0.1
  
Service81.9
 80.5
 1.4
  
Total gross margin70.0% 70.6% (0.6)%  71.6% 70.0% 1.6%  

Total gross margin decreasedincreased by 0.61.6 percentage points in fiscal 20142015 compared to fiscal 2013,2014, as both product and service gross margins declined.increased. Product gross margin decreasedincreased by 0.82.1 percentage points in fiscal 20142015 compared to fiscal 20132014, primarily due to an increase in warranty-related costsa greater mix of $3.2 million and impairment charges relatedhigh-end FortiGate product sales compared to the same period last year, such as our FortiGate-5000 series. In addition, product gross margin was positively impacted by higher sales of software products such as certain intangible assets of $2.4 million. We also experienced increased freight costs of $2.0 million, higher excessour virtualized security solutions, as well as by inventory write-offs of $1.4 million, increased personnel-related costs of $0.9 million, and increased occupancy-related costs of $0.8 million.management efficiencies.

Services and otherService gross margin remained relatively consistentincreased during fiscal 20142015 as compared to fiscal 2013.2014, as we scaled efficiencies resulting from our ability to charge more for our FortiGuard security subscription and FortiCare technical support offerings. Cost of services and otherservice revenue increased by $13.7$16.7 million primarily due to a $9.5an $11.6 million increase in personnel costs including stock-based compensation, related to headcount increases, a $1.4 million increase in depreciation, a $1.1 million increase in occupancy-related costs, and a $0.8 million increase in professional services.increases.

Operating expenses
 
Year Ended December 31, Change % ChangeYear Ended December 31, Change % Change
2014 2013 2015 2014 
Amount 
% of
Revenue
 Amount 
% of
Revenue
 Amount 
% of
Revenue
 Amount 
% of
Revenue
 
(in thousands, except percentages)
Operating expenses:                      
Research and development$122,880
 16% $102,660
 17% $20,220
 20%$158,129
 16% $122,880
 16% $35,249
 29%
Sales and marketing315,804
 41
 224,991
 36
 90,813
 40
470,371
 47
 315,804
 41
 154,567
 49
General and administrative41,347
 5
 34,913
 6
 6,434
 18
71,514
 7
 41,347
 5
 30,167
 73
Restructuring charges7,600
 1
 
 
 7,600
 *
Total operating expenses$480,031
 62% $362,564
 59% $117,467
 32%$707,614
 70% $480,031
 62% $227,583
 47%
* not meaningful

Research and development

Research and development expense increased by $20.2$35.2 million, or 20%29%, in fiscal 20142015 compared to fiscal 20132014, primarily due to an increase of $12.0$25.8 million in personnel costs as a result of increased headcount to support the development of new products and continued enhancements of our existing products. In addition, stock-based compensation increased by $4.0 million, product development expenses, such as suppliesDepreciation and third-party testing and prototypes, increased by $3.4 million,other occupancy-related costs and depreciation expense increased by $2.8 million, and professional services costs increased by $1.0$3.6 million. These increases were partially offset byIn addition, during 2014, we had a reversal of $3.0 million decrease inrelated to a previously recorded liability for estimated contingent consideration. For discussion of the contingent consideration, see Note 2 of the notes to our consolidated financial statements in Part II, Item 8 of this Annual

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Report on Form 10-K. We intend to continue to invest in our research and development organization but expect research and development expense as a percentage of total revenue to remain at comparable levels in fiscal 2015.

Sales and marketing

Sales and marketing expense increased by $90.8$154.6 million, or 40%49%, in fiscal 20142015 compared to fiscal 2013,2014, primarily due to an increase of $58.8$108.0 million in personnel costs as we continued to increase our sales headcount in order to drive continued market share gains globally.and marketing headcount. Marketing-related expenses increased by $12.9$16.9 million as we invested significantly in marketing investments to capturedrive broader market share, particularly in the enterpriseawareness, create a global marketing engine, build broad market including costs related to tradeshows and lead generation campaigns.and nurture programs and accelerate pipeline. In addition, we incurred increases in stock-based compensation expense of $7.2 million, depreciation and other expenses of $4.4 million, travel expenses of $4.2 million, supplies of $2.2$9.1 million, and depreciation and occupancy-related costcosts of $1.0$9.3 million. As a

percentage of total revenue, sales and marketing expensesexpense increased as we accelerated the investment in our sales force and marketing campaignsprograms to drive future growth. We intend to continue to make investments in our sales resources and infrastructure and marketing, which are critical to support growth and expect sales and marketing expense as a percentage of total revenue to increase in fiscal 2015.

General and administrative

General and administrative expense increased by $6.4$30.2 million, or 18%73%, in fiscal 20142015 compared to fiscal 2013.2014. Personnel costs including stock-based compensation, increased by $6.8$14.6 million as we continued to increase our headcount in order to support our expanding business. In addition, professional services fees increased $0.8by $6.9 million, partially offset by a decreaseprimarily due to legal services related to the assertion of $1.3our intellectual property and other rights. In 2015, we also incurred $5.4 million in occupancy-relatedthird party expenses related to business process design and reengineering in preparation of an ERP system implementation and $1.7 million of costs related to the Meru acquisition.

Restructuring

Restructuring expenses of $7.6 million in 2015, primarily relate to the restructuring activities in connection with the Meru acquisition to reduce our cost structure and improve operational efficiencies. See Note 9 to the consolidated financial statements for additional details, including depreciationtypes of expenses incurred and supplies. We expect generalthe timing of future expenses and administrative expense to increase slightly as a percentagecash payments. See also the “Liquidity and Capital Resources” section of total revenue in fiscal 2015.this Part II, Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

Interest income and other expensenet
 
Year Ended December 31,    Year Ended December 31, Change % Change
2014 2013 Change % Change2015 2014 
(in thousands, except percentages)
Interest income$5,393
 $5,306
 $87
 2%$5,295
 $5,393
 $(98) (2)%
Other expense—net(3,168) (1,455) (1,713) 118
(3,167) (3,168) 1
 

The $0.1 million increaseInterest income and other expense—net remained relatively consistent in interest income in fiscal 20142015 compared to fiscal 2013 was2014. Interest income varies depending on our average investment balances during the period, types and mix of investments, and market interest rates. Other expense—net consisted primarily due to interest earned on higher invested balances of cash, cash equivalents and investments. The change in other expense—net, for fiscal 2014 when compared to fiscal 2013, was the result of higher foreign exchange losses and the impact of a reevaluation of the functional currency selection of certain of our international subsidiaries.losses.

Provision for income taxes
 
Year Ended December 31, Change % ChangeYear Ended December 31, Change % Change
2014 2013 2015 2014 
(in thousands, except percentages)
Provision for income taxes$36,206
 $31,668
 $4,538
 14%$9,018
 $36,206
 $(27,188) (75)%
Effective tax rate (%)59% 42% 17% 
53% 59% (6)% 
 
Our effective tax rate was 59%53% for fiscal 2014,2015, compared with an effective tax rate of 42%59% for fiscal 2013.2014. The provision for income taxes for fiscal 20142015 was comprised primarily of U.S. federal and state taxes, other foreign income taxes, foreign withholding taxes discrete events resulting fromand an increase in tax reserves, as well as the inclusion of stock-based compensation benefits and transfer pricing allocations which impactimpacted jurisdictional income taxed at various tax rates. The increasedecrease in the effective tax rate in fiscal 20142015 was primarily due to an increase in estimatedhigher research and development credits, additional tax liabilitybenefits related to foreign operations, an increase in tax reserves, an increase in non-tax deductible stock-based compensation expense and limitations on utilizinglower foreign withholding tax credits.taxes.

It is our policy to classify accrued interest and penalties related to unrecognized tax benefits in the provision for income taxes. As of December 31, 2014,2015, we had accrued $1.7$5.5 million for estimated interest related to uncertain tax provisions compared to an accrual of $1.0$1.7 million as of December 31, 2013.

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Within the next twelve months, we do not believe there will be a decrease in uncertain tax benefits that could significantly impact our effective tax rate.

Fiscal Years 2013 and 2012

Revenue
 Year Ended December 31, Change % Change
2013 2012 
Amount 
% of
Revenue
 Amount 
% of
Revenue
 
(in thousands, except percentages)
Revenue:           
Product$278,046
 45% $248,948
 47% $29,098
 12%
Services and other337,251
 55
 284,691
 53
 52,560
 18
Total revenue$615,297
 100% $533,639
 100% $81,658
 15%
Revenue by Geography:           
Americas$252,786
 41% $217,056
 41% $35,730
 16%
EMEA208,979
 34
 184,175
 35
 24,804
 13
APAC153,532
 25
 132,408
 24
 21,124
 16
Total revenue$615,297
 100% $533,639
 100% $81,658
 15%

Total revenue increased by $81.7 million, or 15%, in fiscal 2013 compared to fiscal 2012. The Americas region contributed the largest portion of our revenue growth on an absolute dollar basis and all three regions showed growth on a percentage basis. The growth in EMEA was slightly lower due to a slowdown in the macroeconomic environment in that area. Product revenue increased by $29.1 million, or 12%, compared to fiscal 2012. The increase in product revenue was primarily driven by greater sales volume in our FortiGate product due to increased demand across all product categories from our entry-level and mid-range products for smaller enterprises and branch deployments to our high-end products for large enterprise and service provider customers. Services and other revenue increased by $52.6 million, or 18%, in fiscal 2013 compared to fiscal 2012 due to the recognition of revenue from our growing deferred revenue balance consisting of FortiGuard security subscription and FortiCare technical support contracts sold to a larger customer base as well as renewals of similar contracts sold in earlier periods.

Cost of revenue and gross margin
 Year Ended December 31, Change % Change
2013 2012 
(in thousands, except percentages)
Cost of revenue:       
Product$114,611
 $93,971
 $20,640
 22%
Services and other66,032
 53,449
 12,583
 24
Total cost of revenue$180,643
 $147,420
 $33,223
 23%
Gross margin (%):       
Product58.8% 62.3% (3.5)%  
Services and other80.4
 81.2
 (0.8)  
Total gross margin70.6% 72.4% (1.8)%  
Total gross margin decreased by 1.8 percentage points in fiscal 2013 compared to fiscal 2012, as both product and services and other gross margins declined. Product gross margin decreased by 3.5 percentage points in fiscal 2013 compared to fiscal 2012 primarily due to a slightly higher mix of sales of entry-level products, particularly several high-volume distributed enterprise, retail and education deals sold in the fourth quarter of fiscal 2013. We also experienced higher warranty-related costs of $2.5 million, increased freight costs of $1.5 million, increased occupancy-related costs of $1.1 million and higher

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excess inventory write-offs of $0.7 million. Services and other gross margin decreased by 0.8 percentage points during fiscal 2013 primarily due to our continued investments in our technical support organization to accommodate our expanding customer base and higher service level expectations from our enterprise customers. In addition, we experienced growth in our professional consulting services which have lower gross margins than our support and subscription businesses. Cost of services and other revenue increased by $12.6 million primarily due to a $9.9 million increase in personnel costs related to headcount increases, a $1.1 million increase in stock-based compensation expense, and a $2.4 million increase in depreciation and other expenses.

Operating expenses
 Year Ended December 31, Change % Change
2013 2012 
Amount 
% of
Revenue
 Amount 
% of
Revenue
 
(in thousands, except percentages)
Operating expenses:           
Research and development$102,660
 17% $81,078
 15% $21,582
 27%
Sales and marketing224,991
 36
 179,155
 33
 45,836
 26
General and administrative34,913
 6
 25,511
 5
 9,402
 37
Total operating expenses$362,564
 59% $285,744
 53% $76,820
 27%

Research and development expense

Research and development expense increased by $21.6 million, or 27%, in fiscal 2013 compared to fiscal 2012 primarily due to an increase of $11.7 million in personnel costs as a result of increased headcount to support the development of new products and continued enhancements of our existing products. In addition, stock-based compensation expense increased by $4.0 million, product development expenses, such as third-party testing and prototypes, increased by $2.0 million, acquisition-related costs increased by $1.9 million, and depreciation and other expenses increased by $2.1 million.

Sales and marketing expense

Sales and marketing expense increased by $45.8 million, or 26%, in fiscal 2013 compared to fiscal 2012, primarily due to an increase of $25.6 million in personnel costs as we continued to increase our sales headcount in order to expand our global footprint. In addition, stock-based compensation expense increased by $6.7 million, marketing-related expenses increased by $5.4 million, travel expenses increased by $3.9 million, depreciation expenses increased by $2.1 million, and other expenses increased by $2.1 million. As a percentage of total revenue, sales and marketing expenses increased as we accelerated the investment in our sales force during fiscal 2013 to support future growth.

General and administrative expense

General and administrative expense increased by $9.4 million, or 37%, in fiscal 2013 compared to fiscal 2012. Personnel costs increased by $3.4 million and stock-based compensation expense increased by $1.8 million, as we continued to increase our headcount in order to support our expanding business. In addition, we incurred an additional $3.9 million of legal and accounting fees and $0.3 million in higher depreciation expense.

Interest income and other expensenet
 Year Ended December 31, Change % Change
2013 2012 
(in thousands, except percentages)
Interest income$5,306
 $5,006
 $300
 6%
Other expense—net(1,455) (485) (970) 200

The $0.3 million increase in interest income in fiscal 2013 compared to fiscal 2012 was primarily due to interest earned on higher invested balances of cash, cash equivalents and investments. The change in other expense—net, for fiscal 2013 when compared to fiscal 2012, was the result of higher foreign exchange losses.

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Provision for income taxes
 Year Ended December 31, Change % Change
2013 2012 
(in thousands, except percentages)
Provision for income taxes$31,668
 $38,160
 $(6,492) (17)%
Effective tax rate (%)42% 36% 6% 

Our effective tax rate was 42% for fiscal 2013, compared with an effective tax rate of 36% for fiscal 2012. The provision for income taxes for fiscal 2013 was comprised primarily of federal, state and foreign income taxes as well as the inclusion of stock-based compensation benefits and cost allocations, which affected the transfer pricing calculations among the United States and some of our foreign subsidiaries. The increase in the effective tax rate for fiscal 2013 as compared to fiscal 2012 was primarily due to an increase in profits subject to U.S. tax, a decrease in stock-based compensation benefits, and their corresponding impact on the transfer pricing calculations among the United States and some of our foreign subsidiaries

During January 2013, the U.S. Federal Research and Development Tax Credit was reinstated retroactively to fiscal 2012. The U.S. Federal Research and Development Tax Credit benefit was recorded in the first quarter of fiscal 2013, which was the period of enactment.

Beginning with fiscal 2013, we operate under a tax incentive agreement in Singapore, which is effective through December 31, 2023, and may be extended if certain additional requirements are satisfied. The tax incentive agreement is conditional upon our meeting certain employment and investment thresholds.

It is our policy to classify accrued interest and penalties related to unrecognized tax benefits in the provision for income taxes. As of December 31, 2013, we had accrued approximately $1.0 million for estimated interest related to uncertain tax provisions compared to an accrual of $1.5 million as of December 31, 2012.2014.





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Quarterly Results of Operations

The following table sets forth our unaudited quarterly statements of operations data for the last eight fiscal quarters. The information for each of these quarters has been prepared on the same basis as the audited annual financial statements included elsewhere in this Annual Report and, in the opinion of management, includes all adjustments, which includes only normal recurring adjustments, necessary for the fair presentation of the results of operations for these periods. This data should be read in conjunction with our audited consolidated financial statements and related notes included elsewhere in this annual report. These quarterly operating results are not necessarily indicative of our operating results for any future period.

Three Months EndedThree Months Ended
Dec 31,
2014
 Sept 30,
2014
 Jun 30,
2014
 Mar 31,
2014
 Dec 31,
2013
 Sept 30,
2013
 Jun 30,
2013
 Mar 31,
2013
Dec 31,
2016
 Sept 30,
2016
 Jun 30,
2016
 
Mar 31,
2016
(3)
 Dec 31,
2015
 Sept 30,
2015
 Jun 30,
2015
 Mar 31,
2015
(in thousands, except per share amounts)(in thousands, except per share amounts)
Consolidated Statements of Operations Data:                              
Revenue:                              
Product$110,678
 $87,731
 $85,384
 $76,765
 $83,884
 $69,687
 $66,525
 $57,950
$158,925
 $127,972
 $136,641
 $124,572
 $144,759
 $119,737
 $114,777
 $97,509
Services and other113,291
 105,617
 98,714
 92,184
 93,466
 85,012
 80,903
 77,870
Service203,905
 188,674
 174,750
 160,004
 151,770
 140,331
 125,008
 115,377
Total revenue223,969
 193,348
 184,098
 168,949
 177,350
 154,699
 147,428
 135,820
362,830
 316,646
 311,391
 284,576
 296,529
 260,068
 239,785
 212,886
Cost of revenue:                              
Product (1)(2)
46,070
 35,636
 37,455
 32,139
 37,579
 27,126
 26,948
 22,958
56,616
 50,267
 52,788
 49,313
 55,466
 46,167
 47,397
 41,368
Services and other (1)
19,554
 21,249
 20,302
 18,604
 16,298
 16,804
 16,760
 16,170
Service (1)(2)
34,275
 34,532
 31,715
 28,331
 26,510
 25,534
 22,101
 22,234
Total cost of revenue65,624
 56,885
 57,757
 50,743
 53,877
 43,930
 43,708
 39,128
90,891
 84,799
 84,503
 77,644
 81,976
 71,701
 69,498
 63,602
Total gross profit158,345
 136,463
 126,341
 118,206
 123,473
 110,769
 103,720
 96,692
271,939
 231,847
 226,888
 206,932
 214,553
 188,367
 170,287
 149,284
Operating expenses:                              
Research and development (1)
33,097
 30,790
 29,938
 29,055
 27,747
 26,421
 25,158
 23,334
45,589
 47,239
 45,502
 44,754
 42,814
 42,110
 37,389
 35,816
Sales and marketing (1)(2)
93,228
 80,433
 74,817
 67,326
 62,331
 56,687
 55,997
 49,976
162,873
 154,831
 162,694
 146,103
 136,840
 120,994
 111,928
 100,609
General and administrative (1)
12,104
 9,789
 10,444
 9,010
 8,752
 9,382
 8,788
 7,991
17,451
 22,006
 22,184
 19,439
 20,315
 21,220
 18,018
 11,961
Restructuring charges833
 2,283
 553
 328
 1,717
 5,883
 
 
Total operating expenses138,429
 121,012
 115,199
 105,391
 98,830
 92,490
 89,943
 81,301
226,746
 226,359
 230,933
 210,624
 201,686
 190,207
 167,335
 148,386
Operating income19,916
 15,451
 11,142
 12,815
 24,643
 18,279
 13,777
 15,391
Operating income (loss)45,193
 5,488
 (4,045) (3,692) 12,867
 (1,840) 2,952
 898
Interest income1,402
 1,339
 1,319
 1,333
 1,318
 1,282
 1,337
 1,369
1,964
 1,888
 1,705
 1,746
 1,176
 1,333
 1,364
 1,422
Other (expense) income—net(1,200) (1,005) (574) (389) (419) (1,151) (100) 215
Income before income taxes20,118
 15,785
 11,887
 13,759
 25,542
 18,410
 15,014
 16,975
Provision for income taxes13,305
 11,729
 5,806
 5,366
 13,526
 7,381
 6,035
 4,726
Net income$6,813
 $4,056
 $6,081
 $8,393
 $12,016
 $11,029
 $8,979
 $12,249
Net income per share:
               
Other expense—net(3,650) (787) (1,350) (1,312) (1,007) (653) (830) (677)
Income (loss) before income taxes43,507
 6,589
 (3,690) (3,258) 13,036
 (1,160) 3,486
 1,643
Provision for (benefit from) income taxes18,341
 298
 (2,302) (5,376) 15,570
 (9,329) 2,694
 83
Net income (loss)$25,166
 $6,291
 $(1,388) $2,118
 $(2,534) $8,169
 $792
 $1,560
Net income (loss) per share:
               
Basic$0.04
 $0.02
 $0.04
 0.05
 $0.07
 $0.07
 $0.06
 $0.08
$0.15
 $0.04
 $(0.01) 0.01
 $(0.01) $0.05
 $
 0.01
Diluted$0.04
 $0.02
 $0.04
 $0.05
 $0.07
 $0.07
 $0.05
 $0.07
$0.14
 $0.04
 $(0.01) $0.01
 $(0.01) $0.05
 $
 $0.01

__________________________

(1) 
Includes stock-based compensation expense as follows:


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Three Months EndedThree Months Ended
Dec 31,
2014
 Sept 30,
2014
 Jun 30,
2014
 Mar 31,
2014
 Dec 31,
2013
 Sept 30,
2013
 Jun 30,
2013
 Mar 31,
2013
Dec 31,
2016
 Sept 30,
2016
 Jun 30,
2016
 Mar 31,
2016
 Dec 31,
2015
 Sept 30,
2015
 Jun 30,
2015
 Mar 31,
2015
(in thousands)(in thousands)
Cost of product revenue$132
 $60
 $178
 $113
 $106
 $91
 $96
 $90
$313
 $309
 $298
 $280
 $332
 $291
 $210
 $140
Cost of services revenue1,612
 1,522
 1,363
 1,329
 1,298
 1,297
 1,226
 1,020
Cost of service revenue2,276
 2,238
 2,123
 2,134
 1,980
 1,849
 1,660
 1,632
Research and development4,706
 4,505
 4,171
 3,882
 3,666
 3,548
 3,291
 2,766
7,871
 7,648
 7,458
 7,143
 7,194
 6,663
 5,541
 5,157
Sales and marketing7,854
 7,397
 5,747
 5,746
 5,599
 5,215
 4,594
 4,118
17,930
 17,378
 16,990
 15,815
 14,954
 13,904
 11,271
 9,307
General and administrative2,377
 1,183
 3,257
 1,860
 2,018
 1,627
 1,500
 1,305
3,691
 3,520
 3,478
 3,530
 3,627
 3,612
 3,078
 2,686
Total stock-based compensation expense$16,681
 $14,667
 $14,716
 $12,930
 $12,687
 $11,778
 $10,707
 $9,299
$32,081
 $31,093
 $30,347
 $28,902
 $28,087
 $26,319
 $21,760
 $18,922

(2) 
IncludesTotal amortization expenseincluded in the product and impairment charges related to certain intangible assetsservice costs are as follows:

 Three Months Ended
 Dec 31,
2014
 Sept 30,
2014
 Jun 30,
2014
 Mar 31,
2014
 Dec 31,
2013
 Sept 30,
2013
 Jun 30,
2013
 Mar 31,
2013
 (in thousands)
Amortization expense of certain intangible assets$244
 $244
 $408
 $511
 $508
 $423
 $354
 $266
Impairment charges related to certain intangible assets  
 2,404
 
 469
 
 
 
Total amortization expense and impairment charges related to certain intangible assets$244
 $244
 $2,812
 $511
 $977
 $423
 $354
 $266
 Three Months Ended
 Dec 31,
2016
 Sept 30,
2016
 Jun 30,
2016
 Mar 31,
2016
 Dec 31,
2015
 Sept 30,
2015
 Jun 30,
2015
 Mar 31,
2015
 (in thousands)
Amortization of intangible assets$3,022
 $2,839
 $2,269
 $1,178
 $1,319
 $1,319
 $244
 $244
Impairment of intangible assets
 
 
 
 
 
 1,593
 
Total amortization and impairment of intangible assets$3,022
 $2,839
 $2,269
 $1,178
 $1,319
 $1,319
 $1,837
 $244

(3)
In March 2016, the Financial Accounting Standards Board issued Accounting Standard Update (ASU) No. 2016-09, which allows a company to make a policy election to account for forfeitures as they occur. We early adopted this standard and elected to account for forfeitures as they occur using the modified retrospective transition method. The adoption of this standard resulted in a decrease of $2.0 million in our share-based compensation during the first quarter of 2016. The adoption of ASU 2016-09 resulted in a decrease of $3.6 million in our provision for income taxes during the first quarter of 2016.

Seasonality, Cyclicality and Quarterly Revenue Trends

Our quarterly results reflect a pattern of increased customer buying at year-end, which has positively impacted salesbillings and product revenue activity in the fourth quarter. In the first quarter, we generally experience lower sequential billings and product revenue,customer buying, which results in lower revenue. In the third quarter, we generally experience lower sequential billings and revenue in Europe due to reduced economic activity in Europe during the summer months, but this may not always be the case. Similarly, our operating income has been affected by these historical trends because operating expenses are relatively fixed in the near-term.product revenue. Although these seasonal factors are common in the technology sector, historical patterns should not be considered a reliable indicator of our future sales activity or performance. On a quarterly basis, we have usually generated the majority of our product revenue in the final month of each quarter and a significant amount in the last two weeks of each quarter. We believe this is due to customer buying patterns typical in this industry.

Our total quarterly revenue over the past eight quarters has generally increased sequentially in each quarter, except in the first quarterquarters of 2014.2016 and 2015. Product revenue, on average throughout the year, increased in all of the quarters of fiscal 2014 was higher2016 as compared to the same periodsquarters in fiscal 2013,2015, which we believe was due in part to the investments made in our sales and marketing organizations, to a robust security market and to continued product innovation. We are also starting to see a shift from product revenues to higher-margin, recurring service revenues, which reflect our ongoing success in driving sales of low-end and high-end service bundles.

Total gross margin has fluctuated on a quarterly basis primarily due to shifts in the mix of sales between products and services. Product gross margins, on average throughout the fiscal year, slightly decreased in fiscal 2014 compared to the same quarter of fiscal 2013 due to product mix.services and between products. Product gross margin varies based on the types of products sold and the average selling prices of our products. In addition, product gross margin was positively impacted by higher sales of software products such as certain of our virtualized security solutions, as well as inventory management efficiencies. Service gross margins, on average throughout the fiscal year, remained relatively consistentincreased in fiscal 20142016 compared to fiscal 2013.2015 due to a mix shift to higher-margin service revenue, as well as scaled efficiencies.


50


Liquidity and Capital Resources
 
December 31As of December 31,
2014 2013 20122016 2015 2014
(in thousands)(in thousands)
Cash and cash equivalents$283,254
 $115,873
 $122,975
$709,003
 $543,277
 $283,254
Investments708,490
 727,172
 616,611
601,505
 621,033
 708,490
Total cash, cash equivalents and investments$991,744
 $843,045
 $739,586
$1,310,508
 $1,164,310
 $991,744
Working capital$550,409
 $322,485
 $249,970
$709,276
 $591,873
 $508,925
          
Year Ended December 31,Year Ended December 31,
2014 2013 20122016 2015 2014
(in thousands)(in thousands)
Cash provided by operating activities$196,582
 $147,384
 $183,866
$345,708
 $282,547
 $196,582
Cash used in investing activities(29,350) (146,734) (182,711)(74,123) (967) (29,350)
Cash (used in) provided by financing activities749
 (6,423) 50,156
Cash provided by (used in) financing activities(105,859) (21,557) 749
Effect of exchange rates on cash and cash equivalents(600) (1,329) (326)
 
 (600)
Net (decrease) increase in cash and cash equivalents$167,381
 $(7,102) $50,985
Net increase in cash and cash equivalents$165,726
 $260,023
 $167,381

Liquidity and capital resources may be impacted by our operating activities, as well as by our business acquisitions, real estate and other capital expenditures, stock repurchases, proceeds associated with stock option exercises and issuances of common stock under the employee stock purchase plan, payment of taxes in connection with the net settlement of equity awards, and investments in strategic relationships that we have made or may make in the future. In January 2014, we received a cash payment of $20.0 million pursuant to a six year mutual covenant-not-to-sue and release agreement with Palo Alto Networks, Inc. As of December 31, 2014, $122.5 million remains available for future share repurchases under ourOur previous stock repurchase program (the “2015 Repurchase Program”) expired on December 31, 2015 with an unused balance under the 2015 Repurchase Program of $62.5 million. In January 2016, our board of directors approved a new share repurchase program, which will be financedauthorizes the repurchase of up to $200.0 million of our outstanding common stock through December 31, 2017. In October 2016, our available working capital.board of directors authorized the purchase of additional $100.0 million of shares of our common stock under the 2016 Repurchase Program, increasing our current authorization to $300.0 million through December 31, 2017. In recent years we have received significant capital resources related toas a result of the exercise of stock options and purchases under our ESPP.options. We expect proceeds in future years to be impacted by our share price and the increased mix of restricted stock units (“RSU”) granted versus stock options and RSUs issued.also to vary based on our share price. We expect to spend approximately $42.0$140.0 million related to our$150.0 million in capital expenditures primarily related to purchase of computer equipment, expansion ofreal estate to expand our offices as well as the implementation of our enterprise resource planning system in fiscal 2015.to support worldwide growth.

As of December 31, 20142016, our cash, cash equivalents, and investments of $991.7 million were held for working-capital purposes and$1.31 billion were invested primarily in corporate debt securities, commercial paper, U.S. government and agency securities, municipal bonds, money market funds, certificates of deposit and term deposits, money market funds, and U.S. government and agency debt securities.deposits. It is our investment policy to invest excess cash in a manner that preserves capital, provides liquidity and maximizes return without significantly increasing risk.

As of December 31, 2014, $265.62016, $504.8 million of our cash and investments waswere held by our international subsidiaries and isare therefore not immediately available to fund domestic operations unless the cash is repatriated. While we do not intend to do so, should this amount be repatriated, most of it would be subject to U.S. federal income tax whichthat would be partially offset by foreign tax credits. In the fourth quarter of 2016, we repatriated $55.0 million of cash from offshore. A decision was made to bring this cash back to the U.S. as it carried a substantial foreign tax credit amounting to $22.3 million. We do not enter into investments for trading or speculative purposes. We believe that our existing cash and cash equivalents will be sufficient to meet our anticipated cash needs for at least the next 12 months. Our future capital requirements will depend on many factors, including our growth rate, the timing and extent of spending to support development efforts, the expansion of sales and marketing activities, the introduction of new and enhanced products and services offerings, the costs to ensure access to adequate manufacturing capacity, and the continuing market acceptance of our products.products and our investments in real estate through purchases or long-term leases. We anticipate our capital expenditures spending in 2017 to be approximately $140.0 million to $150.0 million. Such capital expenditures include purchases completed in January 2017, purchases currently in escrow and purchases signed but not yet in escrow totaling $2.7 million, $88.0 million and $13.0 million, respectively. Historically, we have required capital principally to fund our working capital needs, capital expenditures, share repurchases and acquisition activities. In the event that additional financing is required from outside sources, we may not be able to raise it on terms acceptable to us or at all. If we are unable to raise additional capital when desired, our business, operating results and financial condition would be adversely affected.


Operating Activities

Cash generated by operating activities is our primary source of liquidity. It is primarily comprised of net income, as adjusted for non-cash items, and changes in operating assets and liabilities. Non-cash adjustments consist primarily of stock-based compensation, depreciation of property and equipment, amortization of intangible assets excess tax benefit from stock-based compensation, and amortization of investment premiums.

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Our operating activities during fiscal2016 provided $345.7 million in cash as a result of our continued growth of our business and the ability to successfully manage our working capital. Changes in operating assets and liabilities primarily resulted from an increase in sales of our FortiGuard security subscription and FortiCare technical supports to new and existing customers, as reflected by an increase in our deferred revenue, which was partially offset by an increase in accounts receivable and payments for inventory purchases. We are also starting to see a shift from product revenues to higher-margin, recurring service revenues. For example, our total revenue grew 26% in 2016 compared to 2015, while our total deferred revenue balance grew 31%.

Our operating activities during 2015 provided $282.5 million in cash as a result of our continued growth in billings and the ability to successfully manage our working capital. Additionally, in 2015, we received $9.0 million related to a mutual three-year covenant-not-to-sue agreement. Changes in operating assets and liabilities primarily resulted from an increase in payments received from customers, partially offset by an increase in payments to vendors.

Our operating activities during 2014 provided $196.6 million in cash as a result of profitability, timing of billings and collections, and the ability to successfully manage our working capital. The primary sources of cash from operating activities during fiscal 2014 consisted of net income of $25.3 million, increased by non-cash adjustments of $93.9 million and changes in operating assets and liabilities of $77.4 million. In January 2014, we received $20.0 million pursuant to a six-year mutual covenant-not-to-sue and release agreement with Palo Alto Networks, Inc.Networks. Changes in operating assets and liabilities primarily included an increase in payments received from customers and a receipt of cash related to the mutual covenant-not-to-sue and release agreement, partially offset by payments for inventory purchases, prepayment of certain expenses and payments of income taxes during the period.

Our operating activities during fiscal 2013 provided $147.4 million in cash as a result of profitability, timing of billings and collections, and the ability to successfully manage our working capital. The primary sources of cash from operating activities during fiscal 2013 consisted of net income of $44.3 million increased by non-cash adjustments of $69.2 million and changes in operating assets and liabilities of $33.9 million. Changes in operating assets and liabilities primarily included an increase in payments received from customers, partially offset by payments for inventory purchases.

Our operating activities during fiscal 2012 provided $183.9 million in cash as a result of profitability, timing of billings and collections, and the ability to successfully manage our working capital. The primary sources of cash from operating activities during fiscal 2012 consisted of net income of $66.8 million increased by non-cash adjustments of $44.0 million and changes in operating assets and liabilities of $73.0 million. Changes in operating assets and liabilities primarily included an increase in payments received from customers, partially offset by payments for inventory purchases.

Investing Activities

The changes in cash flows from investing activities primarily relate to timing of purchases, maturities and sales of investments, purchases of property and equipment, and payments made in connection with business acquisitions. Historically, in making a lease versus purchase decision related to our larger facilities, we have elected to purchase the facility. We expect to make similar decisions in the future.

During fiscal2016, cash used for investing activities was primarily due to the $67.2 million we spent on capital expenditures, including our purchases of a warehouse in Union City, California for total cash of $18.5 million, and a $22.1 million payment for the acquisition of AccelOps. The outflow of cash was partially offset by positive cash flow due to maturities, net of purchases, from our investments of $15.1 million.

During 2015, cash used for investing activities was primarily due to $38.0 million used for the acquisition of Meru. In addition we spent $37.4 million on capital expenditures, including our purchases of certain real properties in Sunnyvale, California and Sophia, France for total cash of $13.9 million. The outflow of cash was partially offset by positive cash flow due to maturities, net of purchases, from our investments of $74.4 million.

During 2014, cash used for investing activities was primarily due to $32.2 million spent on capital expenditures, partially offset by positive cash flow due to maturities, net of purchases, from our investments of $2.9 million.

During fiscal 2013, cash used for investing activities was primarily due to $125.2 million of net purchases of investments, $13.9 million for the purchases of property and equipment, and $7.6 million for acquisitions.

During fiscal 2012, cash used for investing activities was primarily due to $159.4 million of net purchases of investments, $22.1 million for the purchases of property and equipment, and $1.2 million for acquisitions.

Financing Activities

The changes in cash flows from financing activities primarily relate to proceeds from the issuance of common stock under our equity incentive plan and ESPP, taxes paid related to net share settlement of equity awards, excess tax benefit from stock-based compensation, and repurchase and retirement of common stock.

During fiscal2016, cash used for financing activities was $105.9 million, primarily due to $110.8 million used to repurchase our common stock. This was partially offset by $6.6 million of proceeds from the issuance of common stock, net of tax withholding.


During 2015, cash used for financing activities was $21.6 million primarily due to $60.0 million used to repurchase our common stock. This was partially offset by $38.4 million of proceeds from the issuance of common stock, net of tax withholding.

During 2014, cash provided by financing activities was $0.7 million as a result of proceeds of $55.3 million from the issuance of common stock under our stock plans. This cash inflow was partially offset by $44.0 million ofused to repurchase our common stock repurchases and $10.6 million of taxes payment related to withholding upon the issuance of RSUs.withholding.

During fiscal 2013, cash used in financing activities was $6.4 million as a result of our repurchase and retirement of $33.5 million of common stock and our net-share settlement of RSUs of $1.5 million. This was offset by receiving proceeds of $12.9 million and $12.7 million from the issuance of common stock under our stock option plans and ESPP, respectively, and an excess tax benefit from employee stock option exercises of $3.0 million.

During fiscal 2012, cash provided by financing activities was $50.2 million as a result of proceeds of $38.1 million from the issuance of common stock under our equity-based incentive plans and an excess tax benefit of $12.1 million







52

Table of Contents


Contractual Obligations and Commitments

The following summarizes our contractual obligations as of December 31, 20142016:
 
 Payments Due by Period
 Total Less than 1 year 1 - 3 years 3 - 5 years More than 5 years
 (in thousands)
Operating leases (1)
$42,624
 $11,535
 $23,365
 $7,274
 $450
Purchase commitments (2)
62,804
 62,804
 
 
 
Other contracts (3)
21,006
 18,169
 2,837
 
 
Total$126,434
 $92,508
 $26,202
 $7,274
 $450
 Payments Due by Period
 Total Less than 1 year 1 - 3 years 3 - 5 years More than 5 years
 (in thousands)
Operating lease commitments (1)
$65,489
 $17,699
 $35,510
 $6,416
 $5,864
Inventory purchase commitments (2)
91,247
 91,247
 
 
 
Other contractual commitments and open purchase orders (3)
50,686
 45,953
 4,733
 
 
Total$207,422
 $154,899
 $40,243
 $6,416
 $5,864
________________________
(1) 
Consists of contractual obligations from non-cancelable office space under operating leases.
(2) 
Consists of minimum purchase commitments with independent contract manufacturers.
(3) 
Consists of an estimate of all open purchase orders and contractual obligations in the ordinary course of business, other than commitments with contract manufacturers and suppliers, for which we have not received the goods or services. Purchase obligations do not include contracts that may be cancelled without penalty. Although open purchase orders are considered enforceable and legally binding, the terms generally allow us the option to cancel, reschedule, and adjust our requirements based on our business needs prior to the delivery of goods or performance of services. No tax liabilities related to uncertain tax positions have been included in the table. As of December 31, 20142016, we had $45.1$68.6 million of long-term tax liabilities, including interest, related to uncertain tax positions. Because of the high degree of uncertainty regarding the settlement of these liabilities, we are unable to estimate the years in which future cash outflows may occur.

Off-Balance Sheet Arrangements

During fiscal 20142016, fiscal 20132015 and fiscal 20122014, we did not have any relationships with unconsolidated organizations or financial partnerships, such as structured finance or special purpose entities that would have been established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes.

Recent Accounting Pronouncement

See Note 1 of the notes to our consolidated financial statements in Part II, Item 8 of this Annual Report on Form 10-K for a full description of recently adopted accounting pronouncements.

ITEM 7A.     Quantitative and Qualitative Disclosures about Market Risk

Interest Rate Fluctuation Risk

The primary objectives of our investment activities are to preserve principal, provide liquidity and maximize income without significantly increasing risk. 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 commercial paper,corporate debt securities, money market funds, commercial paper, municipal bonds, U.S. government and corporate debtagency securities, and certificates of deposit.deposit and term deposits. The risk associated with fluctuating interest rates is limited to our investment portfolio. A 10% decrease in interest rates in fiscal 2014, fiscal 20132016, 2015 and fiscal 20122014 would have resulted in aan insignificant decrease in our interest income in each of these periods of $0.5 million.periods.




Foreign Currency Exchange Risk

Our sales contracts are primarily denominated in U.S. dollars and therefore substantially all of our revenue is not subject to foreign currency translation risk. However, a substantial portion of our operating expenses incurred outside the U.S. are denominated in foreign currencies and are subject to fluctuations due to changes in foreign currency exchange rates, particularly changes in the Canadian dollar (“CAD”), the Euro (“EUR”), the British pound (“GBP”) and the Chinese yen (“CNY”). To help protect against significant fluctuations in value and the volatility of future cash flows caused by changes in currency exchange rates, we engage in foreign currency risk management activities to hedgeminimize the impact of balance sheet items denominated in CAD. We do not use these contracts for speculative or trading purposes. All of the derivative instruments are with high quality financial institutions.institutions and we monitor the credit worthiness of these parties. These contracts typically have maturities betweena maturity of one and three months.month. We record changes in the fair value of forward exchange contracts related to balance sheet accounts as other expense net in the consolidated statement of operations. We recognized an expense of $3.2$6.6 million in other expense, Other expense—net, in fiscal 20142016 due to foreign currency transaction losses.

53

Table of Contents


Our hedging activities areuse of forward exchange contracts is intended to reduce, but not eliminate, the impact of currency exchange rate movements. As our hedging activitiesmovements, are relatively short-term in nature and are focused on the CAD, long-term material changes in the value of the U.S. dollar against other foreign currencies, such as the Euro (“EUR”), British pound (“GBP”),EUR, GBP, and Chinese Renminbi (“CNY”)CNY could adversely impact our operating expenses in the future. We assessed the risk of loss in fair values from the impact of hypothetical changes in foreign currency exchange rates. For foreign currency exchange rate risk, a 10% increase or decrease of foreign currency exchange rates against the U.S. dollar with all other variables held constant would have resulted in a $2.2$5.8 million change in the value of our foreign currency cash accountsbalances as of December 31, 2014.2016.

Inflation Risk

Our monetary assets, consisting primarily of cash, cash equivalents and short-term investments, are not affected significantly by inflation because they are short-term. We believe the impact of inflation on replacement costs of equipment, furniture and leasehold improvements will not materially affect our operations. The rate of inflation, however, affects our cost of revenue and expenses, such as those for employee compensation, which may not be readily recoverable in the price of products and services offered by us.


54


ITEM 8.Financial Statements and Supplementary Data

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS
For the years ended December 31, 2014, 2013,2016, 2015, and 20122014

 
 Page
  
The supplementary financial information required by this Item 8 is included in Part II, Item 7 of this Annual Report on Form 10-K under the caption “Quarterly“Management’s Discussion and Analysis of Financial Condition and Results of Operations—Quarterly Results of Operations.”


55


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM


To the Board of Directors and Stockholders of
Fortinet, Inc.
Sunnyvale, California

We have audited the accompanying consolidated balance sheets of Fortinet, Inc. and subsidiaries (the “Company”) as of December 31, 20142016 and 2013,2015, and the related consolidated statements of operations, comprehensive income, stockholders’ equity, and cash flows for each of the three years in the period ended December 31, 2014.2016. Our audits also included the financial statement schedule listed in the Index at Item 15. These financial statements and financial statement schedule are the responsibility of the Company’s management. Our responsibility is to express an opinion on the financial statements and financial statement schedule based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, such consolidated financial statements present fairly, in all material respects, the financial position of Fortinet, Inc. and subsidiaries as of December 31, 20142016 and 2013,2015, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2014,2016, in conformity with accounting principles generally accepted in the United States of America. Also, in our opinion, such financial statement schedule, when considered in relation to the basic consolidated financial statements taken as a whole, presentspresent fairly, in all material respects, the information set forth therein.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the Company’sCompany's internal control over financial reporting as of December 31, 2014,2016, based on the criteria established in Internal Control Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 27, 2015March 1, 2017 expressed an unqualified opinion on the Company’sCompany's internal control over financial reporting.

/s/ DELOITTE & TOUCHE LLP

San Jose, California
February 27, 2015March 1, 2017



56


FORTINET, INC.
CONSOLIDATED BALANCE SHEETS
(in thousands, except per share amounts)
 
December 31,
2014
 December 31,
2013
December 31,
2016
 December 31,
2015
ASSETS      
CURRENT ASSETS:      
Cash and cash equivalents$283,254
 $115,873
$709,003
 $543,277
Short-term investments436,766
 375,497
376,522
 348,074
Accounts receivable—Net of sales returns reserve and allowance for doubtful accounts of $6,204 and $4,605 as of December 31, 2014 and December 31, 2013, respectively184,741
 130,471
Accounts receivable—Net of reserves for sales returns and doubtful accounts of $11,235 and $6,228 at December 31, 2016 and 2015, respectively312,998
 259,563
Inventory69,477
 48,672
106,887
 83,868
Deferred tax assets41,484
 50,980
Prepaid expenses and other current assets31,143
 14,053
33,306
 35,761
Total current assets1,046,865
 735,546
1,538,716
 1,270,543
LONG-TERM INVESTMENTS271,724
 351,675
224,983
 272,959
DEFERRED TAX ASSETS182,745
 119,216
PROPERTY AND EQUIPMENT—Net58,919
 36,652
137,249
 91,067
DEFERRED TAX ASSETS31,080
 30,058
OTHER INTANGIBLE ASSETS—Net24,828
 17,640
GOODWILL2,824
 2,872
14,553
 4,692
OTHER INTANGIBLE ASSETS—Net2,832
 6,841
OTHER ASSETS10,530
 4,820
16,867
 14,393
TOTAL ASSETS$1,424,774
 $1,168,464
$2,139,941
 $1,790,510
      
LIABILITIES AND STOCKHOLDERS’ EQUITY      
CURRENT LIABILITIES:      
Accounts payable$49,947
 $35,599
$56,732
 $61,500
Accrued liabilities29,016
 27,380
35,640
 33,028
Accrued payroll and compensation45,875
 34,997
78,138
 61,111
Income taxes payable2,689
 21,421
13,588
 8,379
Deferred revenue368,929
 293,664
645,342
 514,652
Total current liabilities496,456
 413,061
829,440
 678,670
DEFERRED REVENUE189,828
 138,964
390,007
 276,651
INCOME TAXES PAYABLE45,139
 30,208
INCOME TAX LIABILITIES68,551
 60,624
OTHER LIABILITIES17,385
 471
14,262
 19,188
Total liabilities748,808
 582,704
1,302,260
 1,035,133
COMMITMENTS AND CONTINGENCIES (Note 10)

 



 

STOCKHOLDERS’ EQUITY:      
Common stock, $0.001 par value — 300,000 shares authorized; 166,443 and 161,535 shares issued and outstanding as of December 31, 2014 and December 31, 2013, respectively166
 161
Common stock, $0.001 par value—300,000 shares authorized; 173,078 and 171,399 shares issued and outstanding at December 31, 2016 and 2015, respectively173
 171
Additional paid-in capital562,504
 462,644
800,653
 687,658
Accumulated other comprehensive (loss) income(349) 1,092
Accumulated other comprehensive loss(765) (933)
Retained earnings113,645
 121,863
37,620
 68,481
Total stockholders’ equity675,966
 585,760
837,681
 755,377
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY$1,424,774
 $1,168,464
$2,139,941
 $1,790,510
See notes to consolidated financial statements.


57


FORTINET, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS
(in thousands, except per share amounts)
 
Year Ended December 31,Year Ended December 31,
2014 2013 20122016 2015 2014
REVENUE:          
Product$360,558
 $278,046
 $248,948
$548,110
 $476,782
 $360,558
Services and other409,806
 337,251
 284,691
Service727,333
 532,486
 409,806
Total revenue770,364
 615,297
 533,639
1,275,443
 1,009,268
 770,364
COST OF REVENUE:          
Product151,300
 114,611
 93,971
208,984
 190,398
 151,300
Services and other79,709
 66,032
 53,449
Service128,853
 96,379
 79,709
Total cost of revenue231,009
 180,643
 147,420
337,837
 286,777
 231,009
GROSS PROFIT:          
Product209,258
 163,435
 154,977
339,126
 286,384
 209,258
Services and other330,097
 271,219
 231,242
Service598,480
 436,107
 330,097
Total gross profit539,355
 434,654
 386,219
937,606
 722,491
 539,355
OPERATING EXPENSES:          
Research and development122,880
 102,660
 81,078
183,084
 158,129
 122,880
Sales and marketing315,804
 224,991
 179,155
626,501
 470,371
 315,804
General and administrative41,347
 34,913
 25,511
81,080
 71,514
 41,347
Restructuring charges3,997
 7,600
 
Total operating expenses480,031
 362,564
 285,744
894,662
 707,614
 480,031
OPERATING INCOME59,324
 72,090
 100,475
42,944
 14,877
 59,324
INTEREST INCOME5,393
 5,306
 5,006
7,303
 5,295
 5,393
OTHER EXPENSE—Net(3,168) (1,455) (485)(7,099) (3,167) (3,168)
INCOME BEFORE INCOME TAXES61,549
 75,941
 104,996
43,148
 17,005
 61,549
PROVISION FOR INCOME TAXES36,206
 31,668
 38,160
10,961
 9,018
 36,206
NET INCOME$25,343
 $44,273
 $66,836
$32,187
 $7,987
 $25,343
Net income per share (Note 8):  
    
  
Basic$0.15
 $0.27
 $0.42
$0.19
 $0.05
 $0.15
Diluted$0.15
 $0.26
 $0.40
$0.18
 $0.05
 $0.15
Weighted-average shares outstanding:  
    
  
Basic163,831
 162,435
 158,074
172,621
 170,385
 163,831
Diluted169,289
 168,183
 166,329
176,338
 176,141
 169,289
See notes to consolidated financial statements.


58


FORTINET, INC.
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
(in thousands)

 Year Ended December 31,
 2014 2013 2012
Net income$25,343
 $44,273
 $66,836
Other comprehensive (loss) income—net of taxes:     
Foreign currency translation (losses) gains(333) (1,617) 524
Unrealized (losses) gains on investments(1,708) (587) 3,331
Tax benefit (provision) related to items of other comprehensive income or loss600
 205
 (1,166)
Other comprehensive (loss) income—net of taxes(1,441) (1,999) 2,689
Comprehensive income$23,902
 $42,274
 $69,525
 Year Ended December 31,
 2016 2015 2014
Net income$32,187
 $7,987
 $25,343
Other comprehensive income (loss):     
Foreign currency translation losses
 
 (333)
Unrealized gains (losses) on investments258
 (897) (1,708)
Tax provision (benefit) related to items of other comprehensive income (loss)90
 (313) (600)
Other comprehensive income (loss)—net of taxes168
 (584) (1,441)
Comprehensive income$32,355
 $7,403
 $23,902

See notes to consolidated financial statements.




59


FORTINET, INC.
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY
(in thousands)
`
Common Stock Treasury Stock 
Additional
Paid-In
Capital
 
Accumulated
Other
Comprehensive (Loss)
Income
 Retained Earnings 
Total
Stockholders’
Equity
Common Stock 
Additional
Paid-In
Capital
 
Accumulated
Other
Comprehensive (Loss)
Income
 Retained Earnings 
Total
Stockholders’
Equity
Shares Amount Shares Amount Shares Amount 
BALANCE—December 31, 2011156,401
 $156
 (1,409) $(2,995) $317,026
 $402
 $43,765
 $358,354
Issuance of common stock upon exercise of stock options4,779
 5
 
 
 27,178
 
 
 27,183
Issuance of common stock in connection with employee stock purchase plan577
 1
 
 
 10,903
 
 
 10,904
Stock-based compensation expense
 
 
 
 30,690
 
 
 30,690
Income tax benefit associated with stock-based compensation
 
 
 
 14,278
 
 
 14,278
Net unrealized gain on investments - net of taxes
 
 
 
 
 2,165
 
 2,165
Net change in cumulative translation adjustments
 
 
 
 
 524
 
 524
Net income
 
 
 
 
 
 66,836
 66,836
BALANCE—December 31, 2012161,757
 $162
 (1,409) $(2,995) $400,075
 $3,091
 $110,601
 $510,934
Issuance of common stock upon exercise of stock options2,488
 2
 
 
 12,886
 
 
 12,888
Issuance of common stock in connection with employee stock purchase plan672
 1
 
 
 12,695
 
 
 12,696
Issuance of common stock upon vesting of restricted stock units228
 
 
 
 
 
 
 
Tax withholding upon vesting of restricted stock awards(70) 
 
 
 (1,452) 
 
 (1,452)
Repurchase and retirement of common stock(3,540) (4) 1,409
 2,995
 (8,929) 
 (33,011) (38,949)
Stock-based compensation expense
 
 
 
 43,909
 
 
 43,909
Income tax benefit associated with stock-based compensation
 
 
 
 3,460
 
 
 3,460
Net unrealized loss on investments - net of taxes
 
 
 
 
 (382) 
 (382)
Net change in cumulative translation adjustments
 
 
 
 
 (1,617) 
 (1,617)
Net income
 
 
 
 
 
 44,273
 44,273
BALANCE—December 31, 2013161,535
 $161
 
 $
 $462,644
 $1,092
 $121,863
 $585,760
161,535
 $161
 $462,644
 $1,092
 $121,863
 $585,760
Issuance of common stock upon exercise of stock options4,763
 5
 
 
 42,426
 
 
 42,431
Issuance of common stock in connection with employee stock purchase plan770
 1
 
 
 13,990
 
 
 13,991
Issuance of common stock upon vesting of restricted stock units1,483
 1
 
 
 (1) 
 
 
Tax withholding upon vesting of restricted stock awards(461) 
 
 
 (10,598) 
 
 (10,598)
Issuance of common stock in connection with equity incentive plans - net of tax withholding6,555
 7
 45,817
 
 
 45,824
Repurchase and retirement of common stock(1,647) (2) 
 
 (4,994) 
 (33,561) (38,557)(1,647) (2) (4,994) 
 (33,561) (38,557)
Stock-based compensation expense
 
 
 
 58,994
 
 
 58,994

 
 58,994
 
 
 58,994
Income tax benefit associated with stock-based compensation
 
 
 
 43
 
 
 43

 
 43
 
 
 43
Net unrealized loss on investments - net of taxes
 
 
 
 
 (1,108) 
 (1,108)
 
 
 (1,108) 
 (1,108)
Net change in cumulative translation adjustments
 
 
 
 
 (333) 
 (333)
 
 
 (333) 
 (333)
Net income
 
 
 
 
 
 25,343
 25,343

 
 
 
 25,343
 25,343
BALANCE—December 31, 2014166,443
 $166
 
 $
 $562,504
 $(349) $113,645
 $675,966
166,443
 166
 562,504
 (349) 113,645
 675,966
Issuance of common stock in connection with equity incentive plans - net of tax withholding6,715
 7
 39,011
 
 
 39,018
Repurchase and retirement of common stock(1,759) (2) (6,847) 
 (53,151) (60,000)
Stock-based compensation expense
 
 95,088
 
 
 95,088
Tax shortfalls, net of excess tax benefits, on stock-based compensation awards
 
 (2,098) 
 
 (2,098)
Net unrealized loss on investments - net of taxes
 
 
 (584) 
 (584)
Net income
 
 
 
 7,987
 7,987
BALANCE—December 31, 2015171,399
 171
 687,658
 (933) 68,481
 755,377
Issuance of common stock in connection with equity incentive plans - net of tax withholding5,533
 6
 5,984
 
 
 5,990
Repurchase and retirement of common stock(3,854) (4) (16,214) 
 (94,610) (110,828)
Stock-based compensation expense
 
 122,423
 
 
 122,423
Cumulative-effect adjustment from adoption of ASU 2016-09
 
 802
 
 31,562
 32,364
Net unrealized gain on investments - net of tax
 
 
 168
 
 168
Net income
 
 
 
 32,187
 32,187
BALANCE—December 31, 2016173,078
 $173
 $800,653
 $(765) $37,620
 $837,681
See notes to consolidated financial statements.

60


FORTINET, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
(in thousands)
Year Ended December 31,Year Ended December 31,
2014 2013 20122016 2015 2014
CASH FLOWS FROM OPERATING ACTIVITIES:          
Net income$25,343
 $44,273
 $66,836
$32,187
 $7,987
 $25,343
Adjustments to reconcile net income to net cash provided by operating activities:          
Depreciation and amortization22,028
 15,623
 11,564
48,520
 31,589
 22,028
Amortization of investment premiums8,703
 11,634
 12,962
4,780
 7,457
 8,703
Stock-based compensation58,994
 43,909
 30,690
122,423
 95,088
 58,994
Excess tax benefit from stock-based compensation
 (2,974) (12,069)
Other non-cash items—net4,140
 961
 881
2,644
 3,391
 4,140
Changes in operating assets and liabilities:     
Changes in operating assets and liabilities, net of assets acquired and liabilities assumed in business acquisitions:     
Accounts receivable—net(55,888) (22,080) (12,120)(57,875) (66,464) (55,888)
Inventory(32,459) (35,093) (11,303)(43,023) (19,088) (32,459)
Deferred tax assets9,072
 (18,750) (9,254)(27,822) (29,851) 9,072
Prepaid expenses and other current assets(16,000) (907) 791
2,616
 (2,630) (16,000)
Other assets(1,302) 1,243
 2,470
(2,352) 667
 (1,302)
Accounts payable18,033
 10,485
 961
39
 (2,517) 18,033
Accrued liabilities7,120
 3,602
 2,171
(3,210) 883
 7,120
Accrued payroll and compensation10,835
 6,013
 4,599
15,696
 11,301
 10,835
Other liabilities14,318
 (1,948) (1,870)(5,013) 2,016
 14,318
Deferred revenue127,416
 68,871
 68,292
242,961
 222,346
 127,416
Income taxes payable(3,771) 22,522
 28,265
13,137
 20,372
 (3,771)
Net cash provided by operating activities196,582
 147,384
 183,866
345,708
 282,547
 196,582
CASH FLOWS FROM INVESTING ACTIVITIES:          
Purchases of investments(497,084) (552,778) (601,087)(473,608) (459,903) (497,084)
Sales of investments41,755
 57,897
 26,268
28,311
 47,900
 41,755
Maturities of investments458,193
 369,659
 415,440
460,443
 486,419
 458,193
Purchases of property and equipment(32,197) (13,877) (22,083)(67,182) (37,358) (32,197)
Payments made in connection with business acquisitions—net of cash acquired(17) (7,635) (1,249)(22,087) (38,025) (17)
Net cash used in investing activities(29,350) (146,734) (182,711)(74,123) (967) (29,350)
CASH FLOWS FROM FINANCING ACTIVITIES:          
Proceeds from issuance of common stock55,324
 25,584
 38,087
44,861
 67,314
 55,324
Taxes paid related to net share settlement of equity awards(10,598) (1,452) 
(38,266) (28,871) (10,598)
Excess tax benefit from stock-based compensation
 2,974
 12,069
Repurchase and retirement of common stock(43,977) (33,529) 
(110,828) (60,000) (43,977)
Payments of debt assumed in connection with business acquisition(1,626) 
 
Net cash provided by (used in) financing activities749
 (6,423) 50,156
(105,859) (21,557) 749
EFFECT OF EXCHANGE RATES ON CASH AND CASH EQUIVALENTS(600) (1,329) (326)
 
 (600)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS167,381
 (7,102) 50,985
NET INCREASE IN CASH AND CASH EQUIVALENTS165,726
 260,023
 167,381
CASH AND CASH EQUIVALENTS—Beginning of year115,873
 122,975
 71,990
543,277
 283,254
 115,873
CASH AND CASH EQUIVALENTS—End of year$283,254
 $115,873
 $122,975
$709,003
 $543,277
 $283,254
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:          
Cash paid for income taxes—net$40,551
 $25,445
 $17,088
$26,608
 $18,893
 $40,551
NON-CASH INVESTING AND FINANCING ACTIVITIES:          
Transfers of evaluation units from inventory to property and equipment$21,069
 $17,395
 $12,733
Liability for purchase of property and equipment and asset retirement obligations$3,275
 $4,253
 $398
$8,157
 $9,870
 $3,275
Liability incurred in connection with business acquisition$
 $100
 $201
Liability incurred for repurchase of common stock$
 $5,420
 $
Equity awards assumed in connection with business acquisition$
 $471
 $
See notes to consolidated financial statements.

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1.SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Business—Fortinet, Inc. (“Fortinet”) was incorporated in Delaware in November 2000 and is a leading provider of network security appliances to enterprises, service providers and government organizations worldwide. Fortinet’s solutions are designed to integrate multiple levels of security protection, including firewall, virtual private networking,VPN, application control, anti-malware, intrusion prevention, web filtering, vulnerability management, anti-spam, mobile security, wireless controller and WAN acceleration. Our security solutions are fast, and secure and designed to provide broad, high-performancerapid protection against dynamic security threats while simplifying the IT infrastructure of our end-customers worldwide.

Basis of Presentation and Preparation—The consolidated financial statements of Fortinet and its wholly owned subsidiaries (collectively, the “Company,” “we,” “us” or “our”) have been prepared in accordance with generally accepted accounting principles in the United StatesU.S. (“GAAP”). All intercompany transactions and balances have been eliminated in consolidation.

Use of Estimates—The preparation of consolidated financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Such management estimates include, implicit service periodsbut are not limited to, the BESP for revenue recognition, litigationour products and settlement costs and other loss contingencies, sales returns reserve and allowance for doubtful accounts,services, stock-based compensation, inventory valuation, warranty reserve,fair value of assets acquired and liabilities assumed in business combinations, measurement of liabilities for uncertain tax positions and deferred tax assets, assessment of recoverability of our goodwill and other long-lived assets, investments, stock-based compensation, accounting for income taxes related to deferred tax asset balancessales returns reserve, restructuring expenses and reserves, and accounting for business combinations.other loss contingencies. We base our estimates on historical experience and also on assumptions that we believe are reasonable. Actual results could differ from those estimates.

Certain Significant Risks and Uncertainties—We are subject to certain risks and uncertainties that could have a material adverse effect on our future financial position or results of operations, such as the following: changes in level of demand for our products and services, the timing and success of new product and service introductions by us or our competitors, price and sales competition and our ability to adapt to changing market conditions and dynamics such as changes in end-customer, distributor or reseller requirements or market needs, changes in expenses caused, for example, by fluctuations in foreign currency exchange rates, management of inventory, internal control over financial reporting, market acceptance of our new products and services, demand for products and services in general, seasonality, failure of our channel partners to perform or other disruption in our channel, the quality of our products and services and the market perception of our response to new viruses or security breaches, general economic conditions, challenges in doing business outside of the United States, changes in customer relationships, litigation, or claims against us based on intellectual property, patent, product regulatory or other factors, product obsolescence, and our ability to attract and retain qualified employees.

We utilize suppliers and independent contract manufacturers for certain of our components and a third-party logistics company for distribution of certain of our products, which is located outside of United States. The inability of any of these parties to fulfill our supply and logistics requirements could negatively impact our future operating results.

Concentration of Credit Risk—Financial instruments that subject us to concentrations of credit risk consist primarily of cash, cash equivalents, short-term and long-term investments and accounts receivable. We maintain ourOur cash cash equivalents, and investments in fixed income securitiesbalances are maintained as deposits with majorvarious large financial institutions in order to limit the exposure of each investment. Deposits held with banks mayU.S. and around the world. Balances in the U.S. typically exceed the amount of insurance provided on such deposits. We maintain our cash equivalents and investments in money market funds, commercial paper and fixed income securities with major financial institutions that our management believes are financially sound.

Our accounts receivables are primarily derived from our channel partners in various geographicalgeographic locations. We perform ongoing credit evaluations of our customers. We generally do not require collateral on accounts receivable and we maintain reserves for estimated potential credit losses.

As of December 31, 20142016, two distributors, Exclusive and Fine Tec Computer, accounted for 26% and 10% of total net accounts receivable, respectively. At December 31, 2013,2015, one distributor, Exclusive, Networks Group accounted for 18% and 13%23% of total net accounts receivable, respectively.receivable.

During fiscal 2014,, fiscal 2013 2015 and fiscal 2012, one distributor,2016, Exclusive Networks Group accounted for 15%, 12%18% and 11%20% of total revenue, respectively.


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Financial Instruments and Fair Value—We apply fair value accounting for all financial assets and liabilities and non-financial assets and liabilities that are recognized or disclosed at fair value in the financial statements on a recurring basis. Due to their short-term nature, the carrying amounts reported in the consolidated financial statements approximate the fair value for accounts receivable, accounts payable, accrued liabilities, and accrued payroll and compensation.

Comprehensive Income—Comprehensive income includes certain changes in equity from non-owner sources that are excluded from net income, specifically, unrealized gains and losses on available-for-sale investments.investments and the related tax impact.

Foreign Currency Translation and Transaction Gains and Losses—Prior to the third quarter of fiscal 2014, the assets and liabilities of our international subsidiaries were translated into U.S. dollars using the applicable exchange rates. The resulting foreign translation adjustments were included in the consolidated balance sheets as a component of accumulated other comprehensive income (loss) and in the consolidated statements of comprehensive income.
In the third quarter of fiscal 2014, we reevaluated the selected functional currency of our international subsidiaries due to the nature of our business operations and recorded the cumulative impact of the reevaluation of the functional currency in the consolidated statement of operations. Subsequently, the remeasurement

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Beginning in the consolidated statementthird quarter of operations prospectively. The impact of this reevaluation is not material for our fiscal 2014 or any of our previously issued financial statements.
As of December 31, 2014, the functional currency of our foreign subsidiaries is the U.S. dollar. MonetaryAccordingly, monetary assets and liabilities denominated in foreign currencies have been remeasured into U.S. dollars using the exchange rates in effect at the balance sheet dates. Foreign currency denominated income and expenses have been remeasured using the average exchange rates in effect during each period. Foreign currency remeasurement losses of $3.2$6.6 million,, $1.5 $3.2 million and $0.5$3.2 million, are included in Otherother expense—net for fiscal2016, 2014, fiscal 20132015 and fiscal 20122014, respectively.

Cash, Cash Equivalents and Available-for-sale Investments—We consider all highly liquid investments, purchased with original maturities of three months or less, to be cash equivalents. Cash and cash equivalents consist of balances with banks and highly liquid investments in money market funds and commercial paper, and certificates of deposit and term deposits.paper.

We classify our investments as available-for-sale at the time of purchase, since it is our intent that these investments are available for current operations. Investments with original maturities greater than three months that mature less than one year from the consolidated balance sheet date are classified as short-term investments. Investments with maturities greater than one year from the consolidated balance sheet date are classified as long-term investments.

Investments are considered to be impaired when a decline in fair value is judged to be other-than-temporary. We consult with our investment managers and consider available quantitative and qualitative evidence in evaluating potential impairment of our investments on a quarterly basis. If the cost of an individual investment exceeds its fair value, we evaluate, among other factors, general market conditions, the duration and extent to which the fair value is less than cost, and our intent and ability to hold the investment. Once a decline in fair value is determined to be other-than-temporary, an impairment charge is recorded and a new cost basis in the investment is established.

For debt securities in an unrealized loss position which is deemed to be other-than-temporary, the difference between the security’s then-current amortized cost basis and fair value is separated into (i) the amount of the impairment related to the credit loss (i.e., the credit loss component) and (ii) the amount of the impairment related to all other factors (i.e., the non-credit loss component). The credit loss component is recognized in earnings. The non-credit loss component is recognized in accumulated other comprehensive loss.

Inventory—Inventory is recorded at the lower of cost (using the first-in, first-out method) or market, after we give appropriate consideration to obsolescence and inventory in excess of anticipated future demand. In assessing the ultimate recoverability of inventory, we make estimates regarding future customer demand, the timing of new product introductions, economic trends and market conditions. If the actual product demand is significantly lower than forecasted, we could be required to record inventory write-downs which would be charged to cost of product revenue. Any write-downs could have an adverse impact on our gross margins and profitability.

Property and Equipment—Property and equipment are stated at cost less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the assets as follows:

Estimated Useful Lives
Building and building improvements2 to 20 years
Computer equipment and software1 to 7 years
Evaluation units1 year
Furniture and fixtures3 to 5 years
Leasehold improvementsShorter of useful life or lease term

Other Investments—Investments in privately heldprivately-held companies where we own less than 20% of the voting stock and have no indicators of significant influence over operating and financial policies of those companies are included in other assets in the consolidated balance sheets and are accounted for under the cost method. For these non-quoted investments, we regularly review the assumptions underlying the operating performance and cash flow forecasts as well as current fundraising activities and valuations based on information provided by these privately heldprivately-held companies. If it is determined that an other-than-temporary decline exists in an equity security, we write down the investment to its fair value and record the related impairment as an investment loss in our consolidated statements of operations.

Inventory—Inventory is recorded at the lower of cost (using the first-in, first-out method) or market, after we give appropriate consideration to obsolescence and inventory in excess of anticipated future demand. In assessing the ultimate

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recoverabilityConsolidation of inventory,Variable Interest Entities—We use a qualitative approach in assessing the consolidation requirement for variable interest entities (“VIEs”). This approach focuses on determining whether we have the power to direct the activities of the VIE that most significantly affect the VIE’s economic performance and whether we have the obligation to absorb losses, or the right to receive benefits, that could potentially be significant to the VIE. For all periods presented in the accompanying consolidated financial statements, we have determined that we are required to make estimates regarding future customer demand,not the timingprimary beneficiary of new product introductions, economic trends and market conditions. If the actual product demand is significantly lower than forecasted, we could be required to record additional inventory write-downs, which could have an adverse impact on our gross margins and profitability.any VIEs.

PropertyBusiness Combinations—We include the results of operations of the businesses that we acquire as of the respective dates of acquisition. We allocate the fair value of the purchase price of our business acquisitions to the tangible and Equipment—Propertyintangible assets acquired and equipment are stated at cost less accumulated depreciation. Depreciation is computed usingliabilities assumed, based on their estimated fair values. The excess of the straight-line methodpurchase price over the estimated useful livesfair values of these identifiable assets and liabilities is recorded as goodwill. We often continue to gather additional information throughout the assets as follows:measurement period, and if we make changes to the amounts recorded, such amounts are recorded in the period in which they are identified.

Estimated Useful Lives
Building and building improvements20 years
Evaluation units1 year
Computer equipment and software1 - 2 years
Furniture and fixtures3 - 5 years
Leasehold improvementsShorter of useful life or lease term

Impairment of Long-Lived Assets—We evaluate events and changes in circumstances that could indicate carrying amounts of long-lived assets, including intangible assets, may not be recoverable. When such events or changes in circumstances occur, we assess the recoverability of long-lived assets by determining whether the carrying value of such assets will be recovered through undiscounted expected future cash flows. If the total of the future undiscounted cash flows is less than the carrying amount of those assets, we record an impairment charge in the period in which we make the determination. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets.

Restructuring— Our restructuring expenses consist of severance and other one-time benefits, contract terminations and other expenses. Liabilities for costs associated with a restructuring activity are measured at fair value. One-time termination benefits are expensed at the date we notify the employee, unless the employee must provide future service, in which case the benefits are expensed ratably over the future service period. A liability for terminating a contract before the end of its term, which is usually done by giving written notice to the counterparty within the notification period specified by the contract or by otherwise negotiating a termination with the counterparty, is recognized at fair value on the notification date. A liability for costs that will continue to be incurred under a contract for its remaining term without economic benefit to the entity is recognized at the cease-use date. Other costs primarily consist of asset write-offs, which are expensed when incurred.
We continually evaluate the adequacy of the remaining liabilities under our restructuring initiatives. Although we believe that these estimates accurately reflect the costs of our restructuring plan, actual results may differ and thereby require us to record an additional provision or reverse a portion of such a provision.

Goodwill —Goodwill represents the excess of purchase consideration over the estimated fair value of net assets of businesses acquired in a business combination. Goodwill acquired in a business combination areis not amortized, but instead tested for impairment at least annually during the fourth quarter.quarter, or sooner when circumstances indicate an impairment may exist. We perform our annual goodwill impairment analysis at the reporting unit level. As of December 31, 2014,2016, we had one reporting unit.

In reviewing The impairment analysis utilizes a quantitative assessment using a two-step impairment test. The first step is to compare the reporting unit’s carrying value, including goodwill, forto the fair value. If the fair value exceeds the carrying value, then no potential impairment we haveis considered to exist. If the option to (i) assess qualitative factorscarrying value exceeds the fair value, the second step is performed to determine whether it is more-likely-than-not thatif the implied fair value of the reporting unit is less than its carrying amount or (ii) bypass the qualitative assessment and proceed directly to a quantitative assessment. If we opt to perform a qualitative assessment, the factors we may review include, but are not limited to (a) macroeconomic conditions; (b) industry and market considerations; (c) cost factors; (d) overall financial performance; (e) other relevant entity-specific events such as changes in management, strategy, customers, or litigation; (f) events affecting the reporting unit; or (g) or sustained decrease in share price. If we believe, as a result of the qualitative assessment, that it is more-likely-than-not that the fair value of the reporting unit is less than its carrying amount, the quantitative impairment test will be required. Otherwise, no further testing will be required. A quantitative assessment utilizes a two-step process. In the first step, the fair value of the reporting unit is determined, and is compared against its carrying amount, including goodwill. We consider a combination of an income-based approach using projected discounted cash flows and a market-based approach using multiples of comparable companies to determine the fair value. The fair value of the reporting unit is estimated using significant judgment based on a combination of the income and the market approaches. Under the income approach, we estimate fair value of the reporting unit based on the present value of forecasted future cash flows that the reporting unit is expected to generate over its remaining life. Under the market approach, we estimate fair value of our reporting unit based on an analysis that compares the value of the reporting unit to values of other companies in similar lines of business. If the fair value of the reporting unit is less than its carrying value, then we perform the second step to measure the amount of impairment loss. The amount of impairment is determined by comparing the implied fair value of reporting unitunit’s goodwill to the carrying value of the goodwill. Whenexceeds the carrying value of the reporting unit's goodwillunit. An impairment charge would be recorded if the carrying value exceeds itsthe implied fair value, we record an impairment loss equal to the difference.value. Impairment charges, if any, are recorded in general and administrative expenses. We have not been required to perform this second step of the process because the fair value of our reporting unit exceeded the net book value as of December 31, 20142016.

Determining the fair value of the reporting unit requires us to make judgments and involves the use of significant estimates and assumptions. These estimates and assumptions include revenue growth rates and operating margins used to calculate projected future cash flows, operating trends, risk-adjusted discount rates, future economic and market conditions and determination of appropriate market comparables. We base our fair value estimates on assumptions we believe to be reasonable

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but that are unpredictable and inherently uncertain. Actual future results may differ from those estimates. We may also test goodwill for impairment between annual tests in the presence of impairment indicators.

Other Intangible Assets—Intangible assets with finite lives are carried at cost, less accumulated amortization. Amortization is computed using the straight-line and accelerated method over the estimated economic lives of the assets, which range from one to five years.

Deferred Revenue—Deferred revenue consists of amounts that have been invoiced but that have not yet been recognized as revenue. This generally includesThe majority of deferred revenue is comprised of security subscription and technical support services which are invoiced upfront and delivered over twelve months or longer.

Income Taxes—We record income taxes using the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been recognized in our financial statements or tax returns. In estimating future tax consequences, generally all expected future events other than enactments or changes in the tax law or rates are considered. We assess the likelihood that some portion or all of ouraddition, deferred tax assets will be recovered fromare recorded for the future benefit of utilizing net operating losses and

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)



research and development credit carryforwards. Deferred tax assets and liabilities are measured using the currently enacted tax rates that apply to taxable income withinin effect for the respective jurisdictions,years in which those tax assets and liabilities are expected to be realized or settled. Valuation allowances are provided when necessary to reduce deferred tax assets to the extent we believe that recovery does not meet the “more-likely-than-not” standard, based solely on its technical merits as of the reporting date, we establish a valuation allowance.amount expected to be realized.

We account forrecognize tax benefits from an uncertain tax positions in accordance with GAAP, which definesposition only if it is more likely than not, based on the confidence leveltechnical merits of the position, that athe tax position must meet in order towill be sustained on examination by the taxing authorities. The tax benefits recognized in the financial statements. The tax effectsstatements from such positions are then measured based on the largest benefit that has a greater than 50% likelihood of a position are recognized only if it is “more likely than not” to be sustained based solely on its technical merits as of the reporting date. We consider many factors when evaluating and estimating our tax positions and tax benefits, which may require periodic adjustments and which may not accurately anticipate actual outcomes.

We operate in various tax jurisdictions and are subject to audit by various tax authorities. We provide for tax contingencies whenever it is deemed more likely than not that a tax asset has been impaired or a tax liability has been incurred for events such as tax claims or changes in tax laws. Tax contingencies are basedbeing realized upon their technical merits, relevant tax law and the specific facts and circumstances as of each reporting period. Changes in facts and circumstances could result in material changes to the amounts recorded for such tax contingencies.ultimate settlement.

Stock-Based Compensation ExpenseThe fair value of RSUs is based on the closing market price of our common stock on the date of grant. We have elected to use the Black-Scholes option pricing model to determine the fair value of our employee stock options and ESPP. The fair value of RSUs is based on the closing market price of our commonPerformance stock on the date of grant. Stock-based compensation expense, net of estimated forfeitures, is amortized on a straight-line basis. PSUsunits (“PSUs”) are RSUs that contain both service-based and market-based vesting conditions. PSUs vest over a specified service period upon the satisfaction of certain market-based vesting conditions, and settle into shares of our common stock upon vesting over a two- or three-year period. The fair value of a PSU is calculated using the Monte Carlo simulation model on the date of grant and is based on the market price of our common stock on the date of grant modified to reflect the impact of the market-based vesting condition, including the estimated payout level based on that condition. We do not adjust compensation cost for subsequent changes in the expected outcome of the market-based vesting conditions. Stock-based compensation expense is amortized on a straight-line basis.

Leases—We rent certain facilities under operating lease agreements and recognize related rent expense on a straight-line basis over the term of the lease. Some of our lease agreements contain rent holidays, scheduled rent increases, lease incentives and renewal options. Rent holidays and scheduled rent increases are included in the determination of rent expense to be recorded over the lease term. Lease incentives are recognized as a reduction of rent expense on a straight-line basis over the term of the lease. Renewals are not assumed in the determination of the lease term unless they are deemed to be reasonably assured at the inception of the lease. We begin recognizing rent expense on the date that we obtain the legal right to use and control the leased space.

Advertising Expense—Advertising costs are expensed when incurred and are included in operating expenses in the accompanying consolidated statements of operations. Our advertising expenses were not significant for any periods presented.

Research and Development Costs—Research and development costs are expensed as incurred.

Software Development Costs—The costs to develop software that is marketed have not been capitalized as we believe our current software development process is essentially completed concurrentconcurrently with the establishment of technological feasibility. Such costs are expensed as incurred and included in research and development in our consolidated statements of operations.

The costs to obtain or develop software for internal use are capitalized based on qualifying criteria, which includes a determination of whether such costs are incurred during the application development stage. Such costs are amortized over the software’s estimated useful life.
Revenue Recognition—We derive the majority of our revenue from sales of our hardware, software, FortiGuard security subscription services and FortiCare technical support services, and other services through our channel partners and a direct sales force.
 




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Revenue is recognized when all of the following criteria have been met:
 
Persuasive evidence of an arrangement exists. Binding contracts or purchase orders are generally used to determine the existence of an arrangement.
 
Delivery has occurred or services have been rendered. DeliveryProduct delivery occurs when we fulfill an order and title and risk of loss has been transferred. ServicesDelivery of software license occurs upon electronic transfer of the license key to the customer. Service revenue is deferred and recognized ratably over the contractcontractual service period, which is typically from one to three years and, to a lesser extent, up to five years, and is generally recognized upon delivery or completion of service.
 

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Sales price is fixed or determinable. We assess whether the sales price is fixed or determinable based on the payment terms associated with the transaction and when the sales price is deemed final.
 
Collectability is reasonably assured. We assess collectability based primarily on creditworthiness as determined by credit checks, analysis, and payment history.

We recognize product revenue for sales to distributors that have no general right of return and direct sales to end-customers upon shipment, based on general revenue recognition accounting guidance once all other revenue recognition criteria have been met. Certain distributors are granted stock rotation rights, limited rights of return as well asand rebates for sales of our products. The arrangement fee for this group of distributors is typically not typically fixed or determinable when products are shipped and revenue is therefore deferred and recognized upon sell-through. For sales that include end-customer acceptance criteria, revenue is recognized upon acceptance.

We recognize software license revenue upon delivery. To date, software license revenues have not represented a significant percentage of the Company's total revenues.

Substantially all of our products have been sold in combination with services, which consist of security subscriptions and technical support services. Security services provide access to our antivirus, intrusion prevention, web filtering and anti-spam functionality. Support services include rights to unspecified software upgrades, maintenance releases and patches, telephone and Internet access to technical support personnel and hardware support. We recognize revenue from these services ratably over the contractual service period. Revenue related to subsequent renewals of these services are recognized over the term of the renewal agreement.

We offer certain sales incentives to channel partners. We reduce revenue for estimates of sales returns and allowances andrecord reductions to revenue for rebates and estimated commitments related to price protection and other customer incentive programs. Additionally, in limited circumstances, we may permit end-customers, distributors and resellers to return our products, subject to varying limitations, for a refund within a reasonably short period from the date of purchase. We estimate and record reserves for sales incentives and sales returns based on historical experience.

Service revenue consists of sales from our FortiGuard security subscription and FortiCare technical support services, professional and training services and other services that include SaaS and IaaS (both of which are hosted or cloud-based services). The Company recognizes revenue from these arrangements as the subscription service is delivered over the term which is typically one year or on a monthly usage basis. To date, SaaS and IaaS revenues have not represented a significant percentage of the Company’s total revenues.

Our sales arrangements typically contain multiple elements, such as hardware, security subscription, technical support services and other services. The majority of our hardware appliance products contain our operating system software that together function to deliver the essential functionality of the product. Our products and services generally qualify as separate units of accounting. We allocate revenue to each unit of accounting based on an estimated selling price using vendor-specific objective evidence (“VSOE”)VSOE of selling price, if it exists, or third-party evidence (“TPE”)TPE of selling price. If neither VSOE nor TPE of selling price existexists for a deliverable, we use our best estimate of selling price (“BESP”)BESP for that deliverable. Revenue allocated to each element is then recognized when the basic revenue recognition criteria are met for each element.

For our hardware products, we use BESP as our selling price. For our support, software licenses and other services, we generally use VSOE as our selling price estimate. We determine VSOE of fair value for elements of an arrangement based on the historical pricing and discounting practices for those services when sold separately. In establishing VSOE, we require that a substantial majority of the selling prices for a service fall within a reasonably narrow pricing range, generally evidenced by a substantial majority of such historical stand-alone transactions falling within a reasonably narrow range as a percentage of list price. We are typically not able to determine TPE for our products or services. TPE is determined based on competitor prices for similar deliverables when sold separately, which is generally unavailable. For our hardware appliances, we use BESP as our selling price. For our support and other services, we generally use VSOE as our selling price estimate. When we are unable to establish a selling price using VSOE for our support and other services, we use BESP in our allocation of arrangement consideration. We determine BESP for a product or service by considering multiple historical factors including, but not limited to, cost of products, gross margin objectives, pricing practices, geographies, customer classes and distribution channels that fall within a reasonably narrow range as a percentage of list price.


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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)



For multiple-element arrangements where software deliverables are included, revenue is allocated to the non-software deliverables and to the software deliverables as a group using the relative estimated selling prices of each of the deliverables in the arrangement based on the estimated selling price hierarchy. The amount allocated to the software deliverables is then

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allocated to each software deliverable using the residual method when VSOE of fair value exists. If evidence of VSOE of fair value of one or more undelivered elements does not exist, all software allocated revenue is deferred and recognized when delivery of those elements occurs or when fair value can be established. When the undelivered element for which we do not have VSOE of fair value is support, revenue for the entire arrangement is recognized ratably over the support period. The same residual method and VSOE of fair value principles apply for our multiple element arrangements that contain only software elements.

Shipping and Handling—Shipping and handling fees charged to our customers are recognized as product revenue in the period shipped and the related costs for providing these services are recorded as a cost of sale.

Accounts Receivable—Trade accounts receivable are recorded at the invoiced amount, net of sales returns reserve and allowances for doubtful accounts. The sales returns reserve is determined based on specific criteria including agreements to provide rebates and other factors known at the time, as well as estimates of the amount of goods shipped that will be returned. To determine the adequacy of the sales returns reserve, we analyze historical experience of actual rebates and returns as well as current product return information.returns. The sales returns reservesreserve was $5.8$10.3 million and $4.6$5.5 million as of December 31, 20142016 and 2013,2015, respectively. The allowance for doubtful accounts is determined based on our assessment of the collectability of customer accounts. The allowance for doubtful accounts was $0.4$0.9 million as of December 31, 2014. The allowance for doubtful accounts is not materialand $0.7 million as of December 31, 2013.2016 and 2015, respectively.

Warranties—We generally provide a 1-year warranty on hardware products and a 90-day warranty on software. We also provide extended warranties under the terms of our support agreements. A provision for estimated future costs related to warranty activities in the first year after product sale is recorded as a component of cost of product revenues when the product revenue is recognized, based upon historical product failure rates and historical costs incurred in correcting product failures. Warranty costs related to extended warranties sold under support agreements are recognized as incurred. In the event we change our warranty reserve estimates, the resulting charge against future cost of sales or reversal of previously recorded charges may materially affect our gross margins and operating results.

Accrued warranty activities are summarizedwas not significant as follows (in thousands):
 Year Ended December 31,
 2014 2013 2012
Accrued warranty balance—beginning of the period$3,037
 $2,309
 $2,582
Warranty costs incurred(3,653) (3,444) (2,669)
Provision for warranty for the year, including warranty liabilities assumed in connection with an acquisition5,209
 3,965
 2,639
Adjustment related to pre-existing warranties(324) 207
 (243)
Accrued warranty balance—end of the period$4,269
 $3,037
 $2,309
of December 31, 2016 and 2015.

Foreign Currency Derivatives—Our sales contracts are primarily denominated in U.S. dollars and therefore substantially all of our revenue is not subject to foreign currency translation risk. However, a substantial portion of our operating expenses incurred outside the U.S. are denominated in foreign currencies and are subject to fluctuations due to changes in foreign currency exchange rates, particularly changes in the Canadian dollar (“CAD”).CAD, EUR, GBP and CNY. To help protect against significant fluctuations in the value and the volatility of future cash flows caused by changes in currency exchange rates, we engage in foreign currency risk management activities to hedgeminimize the impact of balance sheet items denominated in CAD. We do not use these contracts for speculative or trading purposes. All of the derivative instruments are with high quality financial institutions and we monitor the creditworthiness of these parties. These contracts typically have maturities betweena maturity of one and three months. We record changesmonth. Changes in the fair value of forward exchange contracts related to balance sheet accounts asare insignificant and are included in Other expense—net in the consolidated statement of operations. As of December 31, 2016, the fair value of the forward exchange contracts was not material.

Additionally, independent of any hedgingour use of foreign currency risk management activities, fluctuations in foreign currency exchange rates may cause us to recognize transaction gains and losses in our consolidated statements of operations. Our hedging activities are intended to reduce, but not eliminate, the impact of currency exchange rate movements. As our hedging activities are relatively short-term in nature and are focused on CAD, long-term material changes in the value of the U.S. dollar against other foreign currencies, such as the EUR, GBP and CNY could adversely impact our operating expenses in the future.

The notional amount of forward exchange contracts as of December 31, 2016 and 2015 were (in thousands):

67
 Buy/Sell Notional
Balance Sheet Contracts:   
Currency—As of December 31, 2016   
CADSell $2,615
    
Currency—As of December 31, 2015   
CADSell $7,011

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The notional amount of forward exchange contracts to hedge balance sheet accounts as of December 31, 2014 and 2013 were (in thousands):

 Buy/Sell Notional
Balance Sheet Contracts:   
Currency—As of December 31, 2014   
CADBuy $6,879
    
Currency—As of December 31, 2013   
CADBuy $21,867
    


ReclassificationRecently Adopted Accounting Standards

Beginning in fiscal 2014, the amounts previously reported as Ratable and other revenue have been combined with the amounts previously reported as Services revenue in the consolidated statements of operations. The combined amounts are now being presented as Services and other revenue in the consolidated statements of operations. The related Cost of revenue and Gross profit have also been combined to conform to the current period presentation. The Ratable and other revenue amounts are not material, and the reclassification did not have any impact on our gross margin or net income.

Recent Accounting Pronouncement

In May 2014,March 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update No. 2014-09 (Topic 606) - Revenue from Contracts with Customers(“ASU 2014-09”ASU”) 2016-09—Compensation—Stock Compensation—Improvements to create a single, joint revenue standard that is consistent across all industriesEmployee Share-Based Payment Accounting. The new guidance changes the accounting for certain aspects of stock-based payments to employees and markets for companies that prepare their financial statements in accordance with GAAP. Under ASU 2014-09, an entity is required to recognize revenue upon the transfer of promised goods or services to customers in an amount that reflects the consideration the entity expectsrequires excess tax benefits and tax deficiencies to be entitledrecorded in the income statement when the awards vest or are settled. In addition, cash flows related to receiveexcess tax benefits will no longer be separately classified as a financing activity apart from other income tax cash flows. ASU 2016-09 also allows us to repurchase more of an employee’s shares for tax withholding purposes without triggering liability accounting, clarifies that all cash payments made on an employee’s behalf for withheld shares should be presented as a financing activity on our cash flows statement, and provides an accounting policy election to account for forfeitures as they occur.

We elected to early adopt the new guidance in exchangethe second quarter of 2016. The primary impact of the adoption was the recognition of excess tax benefits in our provision for those goods or services. ASU 2014-09 is effective for us beginningincome taxes rather than paid-in capital, as well as the adjustment in stock-based compensation expense as a result of our change in forfeiture policy. The new guidance eliminates the requirement to delay the recognition of excess tax benefits until it reduces current taxes payable. We adopted this change on a modified retrospective basis, and recorded unrecognized excess tax benefits of $32.4 million as a cumulative-effect adjustment, which increased retained earnings on January 1, 2017.2016. The new guidance also requires us to record, subsequent to the adoption, excess tax benefits and tax deficiencies in the period these arise. As a result, our provision for income taxes decreased by $3.6 million during the first quarter of 2016.

Under thenew guidance, we have elected to change our policy and have started to recognize forfeitures of awards as they occur. The change in forfeiture policy was adopted using a modified retrospective transition method. We are currently evaluatingrecorded a cumulative-effect adjustment to decrease retained earnings by $0.8 million upon transition on January 1, 2016 and a retrospective decrease of stock-based compensation of $2.0 million during the first quarter of 2016.

The amendment to the minimum statutory withholding tax requirements was adopted on a modified retrospective basis. The adoption had no impact ASU 2014-09 will have on the January 1, 2016 retained earnings. In addition, we adopted the presentation of taxes paid related to net share settlement of equity awards as a financing activity on the statement of cash flows on a retrospective basis. Our adoption had no impact to any of the periods presented in our consolidated financial statements.cash flows statements since such cash flows have historically been presented as a financing activity.

The adoption of ASU 2016-09 impacted our previously reported quarterly results for the three months ended March 31, 2016, as well as our weighted average shares outstanding—diluted, as follows (in thousands, except for earnings per share):

 Three Months Ended
 March 31, 2016
 As Reported As Adjusted
Statements of Operations:   
Stock-based compensation expense$30,881
 $28,901
Benefit from income taxes$(1,809) $(5,376)
Net income (loss)$(3,429) $2,118
Net income (loss) per share—Basic$(0.02) $0.01
Net income (loss) per share—Diluted$(0.02) $0.01
Weighted-average shares outstanding—Diluted171,745
 174,421



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 March 31, 2016
 As Reported As Adjusted
Balance Sheets:   
Deferred tax assets$131,696
 $167,625
Additional paid-in capital$718,849
 $717,671
Retained earnings$23,089
 $60,196

In September 2015, the FASB issued ASU 2015-16—Business Combinations—Simplifying the Accounting for Measurement-Period Adjustments, which eliminates the requirement for an acquirer in a business combination to account for measurement-period adjustments retrospectively. Instead, acquirers must recognize measurement-period adjustments during the period in which they determine the amounts, including the effect on earnings of any amounts they would have recorded in previous periods if the accounting had been completed at the acquisition date. We adopted ASU 2015-16 on January 1, 2016. The adoption of ASU 2015-16 has not had any impact on our consolidated financial statements.

Recent Accounting Standards Not Yet Effective

In January 2017, the FASB issued ASU 2017-04—Intangibles - Goodwill and Other: Simplifying the Test for Goodwill Impairment. ASU 2017-04 eliminates Step 2 from the goodwill impairment test which measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. Under this ASU, an entity should perform its annual or interim goodwill impairment test by comparing the fair value of the reporting unit with its carrying amount, and should recognize an impairment loss for the amount by which the carrying amount exceeds the reporting unit’s fair value with the loss not exceeding the total amount of goodwill allocated to that reporting unit. ASU 2016-06 will be effective for us beginning on January 1, 2020. Early adoption is permitted for interim or annual goodwill impairment tests performed after January 1, 2017. At adoption, this update will require a prospective approach. We will adopt ASU 2017-04 in the fourth quarter of 2017. We do not believe that this standard will have a material impact on our consolidated financial statements.

In November 2016, the FASB issued ASU 2016-18—Statement of Cash Flows, which provides guidance on the classification of restricted cash to be included with cash and cash equivalents when reconciling the beginning of period and end of period total amounts on the statement of cash flows. This pronouncement is effective for us beginning on January 1, 2018, using a retrospective adoption method. We early adopted ASU 2016-18 on January 1, 2017. The adoption of ASU 2016-18 did not have a material impact on our consolidated financial statements.

In October 2016, the FASB issued ASU 2016-16—Income Taxes —Intra-Entity Transfer of Assets Other Than Inventory, which requires the recognition of the income tax consequences of an intra-entity transfer of an asset, other than inventory, when the transfer occurs. ASU 2016-06 will be effective for us beginning on January 1, 2018. We are currently evaluating the impact of adopting ASU 2016-16 on our consolidated financial statements.

In June 2016, the FASB issued ASU 2016-13—Financial Instruments—Credit Losses—Measurement of Credit Losses on Financial Instruments, which requires measurement and recognition of expected credit losses for financial assets held. ASU 2016-13 is effective for us beginning on January 1, 2020, with the option to adopt early on January 1, 2019. We are currently evaluating the impact of ASU 2016-13 will have on our consolidated financial statements.

In February 2016, the FASB issued ASU 2016-02—Leases, which requires the recognition of right-of-use assets and lease liabilities on the consolidated balance sheet for substantially all leases. The new guidance includes a number of optional practical expedients that entities may elect to apply. The new guidance will also require significant additional disclosures about the amount, timing and uncertainty of cash flows from leases. This new guidance will be effective for us beginning on January 1, 2019 using a modified retrospective approach. We currently anticipate to early adopt this new standard on January 1, 2018 in conjunction with our adoption of the new revenue standard. Our ability to early adopt is dependent on system readiness, including software procured from third-party providers, if any, and the completion of our analysis of information necessary to restate prior period financial statements. Based on our current lease portfolio, we estimate the value of leased assets and liabilities that may be recognized could be at least $50.0 million. We are continuing to evaluate the impact of the standard and

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our estimate is subject to change. We do not believe that the standard will have a material impact on our statement of operations.

In May 2014, the FASB issued ASU 2014-09—Revenue from Contracts with Customers, which outlines a single, comprehensive model for entities to use in accounting for revenue arising from contracts with customers. The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. ASU 2014-09 defines a five step process to achieve this core principle and, in doing so, it is possible more judgment and estimates may be required within the revenue recognition process than required under existing U.S. GAAP, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. The FASB has recently issued several amendments to the standard, including clarification on accounting for licenses of intellectual property and identifying performance obligations. The new standard will be effective for us beginning January 1, 2018 which is the required mandatory adoption date and we do not plan to early adopt. The two permitted transition methods under the new standard are the full retrospective method, in which case the standard would be applied to each prior reporting period presented and the cumulative effect of applying the standard would be recognized at the earliest period shown, or the modified retrospective method, in which case the cumulative effect of applying the standard would be recognized at the date of initial application. Currently, we are in the process of reviewing our historical contracts to quantify the impact on our consolidated financial statements. Depending on the results of our review, there could be changes to the timing of revenue recognition and certain costs associated with obtaining and fulfilling our customer contracts. These changes may include the acceleration of revenue and associated costs on sales to certain channel partners that are currently accounted for only once the product is sold through to the end-customer, and the amortization of certain costs related to obtaining customer contracts that include the sales commission we pay to certain employees. We are also in the process of assessing the appropriate changes to our business processes and upgrading our systems and controls to support recognition and disclosure under the new standard. We expect to complete our assessment process, including selecting a transition method for adoption, in the second quarter of 2017.

2. FINANCIAL INSTRUMENTS AND FAIR VALUE

The following table summarizes our investments (in thousands):
 
December 31, 2014December 31, 2016
Amortized
Cost
 
Unrealized
Gains
 
Unrealized
Losses
 
Fair
Value
Amortized
Cost
 
Unrealized
Gains
 
Unrealized
Losses
 
Fair
Value
Corporate debt securities$589,526
 $365
 $(875) $589,016
$379,494
 $43
 $(925) $378,612
Commercial paper51,156
 3
 (4) 51,155
95,110
 23
 (25) 95,108
U.S. government and agency securities64,604
 16
 (79) 64,541
Municipal bonds39,745
 15
 (39) 39,721
59,257
 3
 (235) 59,025
Certificates of deposit and term deposits (1)
22,854
 
 
 22,854
4,219
 
 
 4,219
U.S. government and agency securities5,749
 1
 (6) 5,744
Total available-for-sale securities$709,030
 $384
 $(924) $708,490
$602,684
 $85
 $(1,264) $601,505
              
December 31, 2013December 31, 2015
Amortized
Cost
 
Unrealized
Gains
 
Unrealized
Losses
 
Fair
Value
Amortized
Cost
 
Unrealized
Gains
 
Unrealized
Losses
 
Fair
Value
Corporate debt securities$603,185
 $1,506
 $(374) $604,317
$438,533
 $30
 $(1,369) $437,194
Commercial paper69,356
 7
 
 69,363
66,263
 3
 (34) 66,232
Municipal bonds38,815
 48
 (20) 38,843
61,050
 12
 (40) 61,022
Certificates of deposit and term deposits (1)
12,645
 3
 
 12,648
14,897
 
 
 14,897
U.S. government and agency securities2,000
 1
 
 2,001
41,727
 3
 (42) 41,688
Total available-for-sale securities$726,001
 $1,565
 $(394) $727,172
$622,470
 $48
 $(1,485) $621,033
              
(1) The majority of our certificates of deposit and term deposits are foreign deposits.
(1) The majority of our certificates of deposit and term deposits are foreign deposits.
(1) The majority of our certificates of deposit and term deposits are foreign deposits.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)




The following table shows the gross unrealized losses and the related fair values of our investments that have been in a continuous unrealized loss position (in thousands):

December 31, 2014December 31, 2016
Less Than 12 Months 12 Months or Greater TotalLess Than 12 Months 12 Months or Greater Total
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
Corporate debt securities$317,011
 $(858) $6,011
 $(17) $323,022
 $(875)$311,980
 $(910) $13,541
 $(15) $325,521
 $(925)
Commercial paper8,185
 (4) 
 
 8,185
 (4)
Municipal bonds26,684
 (39) 
 
 26,684
 (39)52,200
 (235) 
 
 52,200
 (235)
U.S. government and agency securities4,745
 (6) 
 
 4,745
 (6)33,430
 (79) 
 
 33,430
 (79)
Commercial paper17,394
 (25) 
 
 17,394
 (25)
Total available-for-sale securities$356,625
 $(907) $6,011
 $(17) $362,636
 $(924)$415,004
 $(1,249) $13,541
 $(15) $428,545
 $(1,264)









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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)



The following table shows the gross unrealized losses and the related fair values of our investments that have been in a continuous unrealized loss position (in thousands):

December 31, 2013December 31, 2015
Less Than 12 Months 12 Months or Greater TotalLess Than 12 Months 12 Months or Greater Total
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
Corporate debt securities$182,795
 $(374) $500
 $
 $183,295
 $(374)$348,534
 $(1,187) $42,033
 $(182) $390,567
 $(1,369)
Commercial paper7,897
 
 
 
 7,897
 
31,977
 (34) 
 
 31,977
 (34)
Municipal bonds14,736
 (20) 
 
 14,736
 (20)41,677
 (36) 1,008
 (4) 42,685
 (40)
U.S. government and agency securities34,703
 (42) 
 
 34,703
 (42)
Total available-for-sale securities$205,428
 $(394) $500
 $
 $205,928
 $(394)$456,891
 $(1,299) $43,041
 $(186) $499,932
 $(1,485)

The contractual maturities of our investments are as follows (in thousands):
 
December 31,
2014
 December 31,
2013
December 31,
2016
 December 31,
2015
Due within one year$436,766
 $375,497
$376,522
 $348,074
Due within one to three years271,724
 351,675
224,983
 272,959
Total$708,490
 $727,172
$601,505
 $621,033

Available-for-sale securities are reported at fair value, with unrealized gains and losses, net of tax, included as a separate component of stockholders’ equity and in total comprehensive income. Realized gains and losses on available-for-sale securities are insignificant in the periods presented and are included in Other expense—net in our consolidated statements of operations. We use the specific identification method to determine the cost basis of investments sold.

The unrealized losses on our available-for-sale securities were caused by fluctuations in market value and interest rates as a result of the economic environment. As the decline in market value are attributable to changes in market conditions and not credit quality, and because we have concluded currently that we neither intend to sell nor is it more likely than not that we will be required to sell these investments prior to a recovery of par value, we do not consider these investments to be other-than temporarily impaired as of December 31, 2014.2016.

Realized gains and losses from the sale of available-for-sale securities were not significant in any period presented.
Fair Value Accounting—We apply the following fair value hierarchy for disclosure of the inputs used to measure fair value. This hierarchy prioritizes the inputs into three broad levels as follows:


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Level 1—Inputs are unadjusted quoted prices in active markets for identical assets or liabilities.

Level 2—Inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the assets or liabilities, either directly or indirectly through market corroboration, for substantially the full term of the financial instruments.

Level 3—Unobservable inputs based on our own assumptions used to measure assets and liabilities at fair value. The inputs require significant management judgment or estimation.

We measure the fair value of money market funds and certain U.S. government and agency securities using quoted prices in active markets for identical assets. The fair value of all other financial instruments was based on quoted prices for similar assertsassets in active markets, or model driven valuations using significant inputs derived from or corroborated by observable market data.
 
We classify investments within Level 1 if quoted prices are available in active markets for identical securities.
 

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We classify items within Level 2 if the investments are valued using model driven valuations using observable inputs such as quoted market prices, benchmark yields, reported trades, broker/dealer quotes or alternative pricing sources with reasonable levels of price transparency. Investments are held by custodians who obtain investment prices from a third-party pricing provider that incorporates standard inputs in various asset price models.

Fair Value of Financial Instruments

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table presents the fair value of our financial assets and liabilities measured at fair value on a recurring basis as of December 31, 20142016 and December 31, 20132015 (in thousands):
 
December 31, 2014   December 31, 2013  December 31, 2016   December 31, 2015  
Aggregate
Fair
Value
 
Quoted
Prices in
Active
Markets For
Identical
Assets
 
Significant
Other
Observable
Remaining
Inputs
 
Significant
Other
Unobservable
Remaining
Inputs
 
Aggregate
Fair
Value
 
Quoted
Prices in
Active
Markets For
Identical
Assets
 
Significant
Other
Observable
Remaining
Inputs
 
Significant
Other
Unobservable
Remaining
Inputs
Aggregate
Fair
Value
 
Quoted
Prices in
Active
Markets For
Identical
Assets
 
Significant
Other
Observable
Remaining
Inputs
 
Significant
Other
Unobservable
Remaining
Inputs
 
Aggregate
Fair
Value
 
Quoted
Prices in
Active
Markets For
Identical
Assets
 
Significant
Other
Observable
Remaining
Inputs
 
Significant
Other
Unobservable
Remaining
Inputs
  (Level 1) (Level 2) (Level 3)   (Level 1) (Level 2) (Level 3)  (Level 1) (Level 2) (Level 3)   (Level 1) (Level 2) (Level 3)
Assets:                              
Corporate debt securities$589,016
 $
 $589,016
 $
 $604,317
 $
 $604,317
 $
$378,612
 $
 $378,612
 $
 $437,194
 $
 $437,194
 $
Commercial paper51,155
 
 51,155
 
 71,363
 
 71,363
 
105,097
 
 105,097
 
 69,231
 
 69,231
 
U.S. government and agency securities64,541
 52,082
 12,459
 
 41,688
 25,693
 15,995
 
Municipal bonds39,721
 
 39,721
 
 38,843
 
 38,843
 
59,025
 
 59,025
 
 61,022
 
 61,022
 
Money market funds38,649
 38,649
 
 
 50,030
 50,030
 
 
Certificates of deposit and term deposits22,854
 
 22,854
 
 12,648
 
 12,648
 
4,219
 
 4,219
 
 14,897
 
 14,897
 
Money market funds13,311
 13,311
 
 
 5,724
 5,724
 
 
U.S. government and agency securities5,744
 1,998
 3,746
 
 2,001
 
 2,001
 
Total$721,801
 $15,309
 $706,492
 $
 $734,896
 $5,724
 $729,172
 $
               
Liabilities:               
Contingent consideration$
 $
 $
 $
 $1,850
 $
 $
 $1,850
Total$
 $
 $
 $
 $1,850
 $
 $
 $1,850
$650,143
 $90,731
 $559,412
 $
 $674,062
 $75,723
 $598,339
 $
                              
Reported as:                              
Cash equivalents$13,311
       $7,724
      $48,638
       $53,029
      
Short-term investments436,766
       375,497
      376,522
       348,074
      
Long-term investments271,724
       351,675
      224,983
       272,959
      
Total$721,801
       $734,896
      $650,143
       $674,062
      


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There were no transfers between Level 1 and Level 2 of the fair value hierarchy during the year ended December 31, 20142016 and December 31, 2013.2015.

We classified the fair value of contingent consideration arising from the acquisition of Coyote Point Systems, Inc. (“Coyote”) (see Note 6), as a Level 3 liability since it is based on a probability-based income approach that includes significant unobservable inputs. Significant inputs used in the determination of fair value based on the probability-weighted income approach primarily include internal cash flow projections, percentage probability of occurrence and discount rates.






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The change in the fair value of our contingent consideration liability was as follows (in thousands):

As of December 31, 2013$1,850
Less change in fair value of contingent consideration(1,850)
As of December 31, 2014$—

Decreases in the projected revenues of Coyote following the acquisition resulted in reductions to the fair value of the contingent consideration and the changes are included in Research and development expense in the consolidated statements of operations.

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

We measure certain assets, including Goodwill, Othergoodwill, other intangible assets—net and investments in privately-held companies at fair value on a nonrecurring basis when there are identifiable events or changes in circumstances that may have a significant adverse impact on the fair value of these assets.

During fiscal 2014,the second quarter of 2015, we reassessed the fair value and the remaining useful life of the developed technologies and customer relationship acquired from the Coyote Point Systems (“Coyote”) business acquisition. Based on this reassessment, we determined a decrease in the projected cash flow and that the remaining net book value of the other intangible assets acquired from Coyote resulted indeveloped technologies and customer relationships were impaired. As a result, we recorded an impairment charge of $2.4$1.6 million to adjust the total fair value of the other intangible assets acquired from Coyote to $2.0 million.associated with these assets. The impairment charge is included within Costcost of product revenue and sales and marketing in the consolidated statements of operations.

As
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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)



3. INVENTORY

Inventory consisted of the following (in thousands):
 
December 31,
2014
 December 31,
2013
December 31,
2016
 December 31,
2015
Raw materials$10,617
 $8,355
$18,924
 $15,425
Finished goods58,860
 40,317
87,963
 68,443
Inventory$69,477
 $48,672
$106,887
 $83,868

Inventory includes finished goods held by distributors where revenue is recognized on a sell-through basis of $1.2$1.0 million and $0.9$1.1 million as of December 31, 20142016 and 2013,2015, respectively. Inventory also includes materials at contract manufacturers to be used in production of $4.8$6.1 million and $4.3$4.9 million as of December 31, 20142016 and 2013,2015, respectively.
 
4. PROPERTY AND EQUIPMENT—Net
Property and equipment—net consisted of the following (in thousands):
 
 December 31,
2014
 December 31,
2013
Land$13,895
 $13,895
Building and building improvements20,166
 610
Evaluation units31,474
 23,442
Computer equipment and software31,821
 22,442
Furniture and fixtures5,096
 1,697
Construction-in-progress3,902
 10,947
Leasehold improvements7,998
 5,417
Total property and equipment114,352
 78,450
Less: accumulated depreciation(55,433) (41,798)
Property and equipment—net$58,919
 $36,652

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In March 2014, we moved into our new corporate headquarters and estimated the useful life of the building and related improvements to be 20 years.
 December 31,
2016
 December 31,
2015
Land$35,079
 $21,683
Building and building improvements49,783
 28,841
Computer equipment and software65,323
 45,632
Evaluation units20,173
 15,784
Leasehold improvements18,699
 11,179
Furniture and fixtures13,995
 8,901
Construction-in-progress4,669
 8,106
Total property and equipment207,721
 140,126
Less: accumulated depreciation(70,472) (49,059)
Property and equipment—net$137,249
 $91,067

Depreciation expense was $20.539.2 million, $13.9$28.4 million and $10.5$20.5 million in fiscal 20142016, fiscal 20132015 and fiscal 20122014, respectively.

In 2016, we purchased certain real estate properties to support the growth in our business operations, for total cash consideration of $27.1 million, of which $13.4 million was allocated to land, $11.0 million was allocated to building and $2.7 million remains in construction in progress as one building has not yet been placed in service.

5. INVESTMENTS IN PRIVATELY-HELD COMPANIES

In fiscal 2014, we invested a total of $4.4 millionOur investments in the equity securities of twothree privately-held companies. In fiscal 2013, we invested a totalcompanies totaled $10.3 million as of $2.0 million in the equity securities of a privately-held company.December 31, 2016 and 2015. Each of these investments are accounted for as cost-basis investments, as we own less than 20% of the voting securities and do not have the ability to exercise significant influence over operating and financial policies of the respective entities. These investments are carried at historical cost and are recorded as Otherother assets on our consolidated balance sheet and would be measured at fair value if indicators of impairment exist.

As of December 31, 2014,2016, no events have occurred that would adversely affect the carrying value of these investments.

We determined that we had a variable interest in these privately-held companies. However, we determined that we were not the primary beneficiary as we did not have the power to direct their activities that most significantly affect their economic performance. The variable interest entities were not required to be consolidated in our consolidated financial statements.


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6. BUSINESS COMBINATIONS

Coyote Point SystemsAccelOps, Inc.

On March 21, 2013,June 7, 2016, we acquired allcompleted our acquisition of the outstanding equity securities of Coyote,AccelOps, Inc. (“AccelOps”), a provider of application delivery, load balancingnetwork security monitoring and accelerationanalytics solutions, for $6.0total cash consideration of $22.1 million, in cash. net of cash received. We believe this acquisition will extend the Fortinet Security Fabric by enhancing our network security visibility, security data analytics and threat intelligence acrossmulti-vendor solutions.

The acquisition also includedof AccelOps is accounted for as a contingent obligation for upbusiness combination in accordance with the ASC 805, Business Combinations (“ASC 805”), issued by the FASB. We use our best estimates and assumptions to $5.5 million in future earn-out paymentsassign fair value to former stockholders of Coyote, if specified future operational objectives, service conditionsthe tangible and financial results were met within two years ofintangible assets acquired and liabilities assumed at the acquisition date. As the future earn-out payments were contingent upon oneWe included acquisition-related costs of Coyote’s former stockholder’s employment during the earn-out period, the estimated fair value of these contingent obligations was recorded as compensation expense ratably over the earn-out periods. During fiscal 2014, we determined that the contingent earn-out payment thresholds will not be met due to decreases$0.3 million in the projected revenue of Coyote following the acquisition,general and reversed the entire $1.9 million carrying amount of the previously recorded liability for contingent consideration.

We accounted for this acquisition as a purchase of a business and, accordingly, theadministrative expenses. The total purchase price was allocated to Coyote’sAccelOps’ identifiable tangible and intangible assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date. The fair value assignedacquisition also included a contingent obligation for up to $4.0 million in future earn out payments to certain former stockholders of AccelOps if specified future financial targets were met as of December 31, 2016. As of the intangible assets acquired was determined using the income approach which discounts expected cash flows to present value using our estimates and assumptions.

The following table summarizesacquisition date, we estimated the fair value of assets acquired and liabilities assumedthe liability to be zero as we did not believe the targets would be met. As of December 31, 2016, the financial targets were not met.  

Total allocation of the purchase price was (in thousands):

Cash and cash equivalents$206
Other current assets501
Finite-lived intangible assets2,800
Indefinite-lived intangible assets2,600
Goodwill2,824
Other assets88
Total assets acquired9,019
Current liabilities1,030
Long-term liabilities2,004
Total liabilities assumed3,034
Total purchase price$5,985
Cash and cash equivalents$171
Accounts receivable1,126
Prepaid expenses and other assets430
Property and equipment203
Deferred tax assets3,435
Finite-lived intangible assets14,900
Indefinite-lived intangible assets in process research and development1,600
Goodwill9,861
Total assets acquired31,726
Deferred revenue4,400
Accounts payable and accrued liabilities3,348
Other liabilities1,694
Total liabilities assumed9,442
Total purchase price allocation$22,284

Finite-lived intangible assets consist of developed technology, customer relationships and other intangible assets. AccelOps’ technology provides a software solution to manage security, performance and compliance from a single platform. The acquired developed technologies include software patents, know-how, process and designs. The value of customer relationships is attributable to the generation of a consistent income source and the avoidance of costs associated with creating new customer relationships.


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OfThe estimated useful life and fair values of the total acquired finitefinite-lived intangible assets we allocated $2.3 million towere as follows (in thousands, except for estimated useful life):
 Estimated Useful Life (in years) Fair Values
Developed technologies4 $12,400
Customer relationships3 2,300
Other2 200
Total  $14,900

The developed technology, $0.5 million totechnologies and other are amortized on a straight-line basis. The amortization expense of developed technologies is recorded in costs of revenue, and other intangibles is recorded in cost of service revenue. The amortization expense of customer relationships is amortized on an accelerated basis and $2.6 million tois recorded in sales and marketing expenses.

Indefinite-lived intangible assets consist of in-process research and development, which will begin to be amortized upon completion of development.

The goodwill of $9.9 million represents the amount of the purchase price in excess of the fair value of the net tangible liabilities assumed and intangible assets acquired, including AccelOps’ assembled workforce. The goodwill recorded as part of the AccelOps acquisition is not deductible for U.S. federal income tax purposes. The financial results of this acquisition are considered immaterial for purposes of pro forma financial disclosures.

Meru Networks, Inc.

On July 8, 2015, we completed our acquisition of Meru Networks, Inc. (“IPR&D”Meru”), a provider of Wi-Fi networking products and services.

In connection with the acquisition, we paid $41.8 million, comprised of cash consideration of $40.9 million, withholding tax liability of $0.4 million and the estimated fair value associated with RSUs of Meru of $0.5 million that were converted for 53,401 shares of our common stock.

We accounted for this transaction as a business combination. We expensed acquisition-related costs of $1.7 million in general and administrative expenses. The total purchase price was allocated to Meru’s identifiable tangible and intangible assets acquired and liabilities assumed based on their estimated fair values as of the acquisition date. Developed technology and customer relationships are being amortized on a straight-line basis, each over an initial estimated useful life

Total allocation of six years,the purchase price was as costfollows (in thousands):

Cash and cash equivalents$3,268
Accounts receivable8,191
Inventory11,610
Prepaid expenses and other assets2,409
Property and equipment920
Deferred tax assets18,585
Finite-lived intangible assets19,600
Goodwill1,868
Total assets acquired66,451
Deferred revenue9,800
Accounts payable and accrued liabilities14,887
Total liabilities assumed24,687
Total purchase price allocation$41,764

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Table of revenue and sales and marketing expense, respectively. During the three months ended September 30, 2013, we completed the development of technology associated with the IPR&D projects, and started amortizing this developed technology as Cost of product revenue ratably on a straight-line basis over an estimated useful life of five years. During fiscal 2014, we recorded an impairment charge of $2.4 million related to the finite-lived intangible assets as Cost of product revenue in the consolidated statements of operations.Contents
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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)




The goodwill of $2.8$1.9 million represents the premium we paid over the fair value of the net tangible liabilities assumed and identified intangible assets acquired, due primarily to acquire developed and in-process technology. NoneMeru’s assembled workforce. The goodwill recorded as part of the goodwill recognized as a resultMeru acquisition is not deductible for U.S. federal income tax purposes.

Intangible assets consist primarily of customer relationships and developed technologies. Customer relationships represent Meru’s installed base and the ability to sell existing, in-process and future versions of our products and services to its existing customers. Developed technologies represent the virtualized wireless local area network solutions offering centralized coordination and control of various access points on the network. This includes patented and unpatented technology, know-how, processes, designs and computer software. The estimated useful life and fair values of the acquisition is deductibleacquired identifiable intangible assets were as follows (in thousands, except for income tax purposes. The financial results of this acquisition were considered immaterial for purposes of pro-forma financial disclosures.estimated useful life):

Other Fiscal 2013 Acquisition
 Estimated Useful Life (in years) Fair Values
Customer relationships5 $12,200
Developed technologies4 7,200
Trade name0.5 200
Total  $19,600

In September 2013, we acquired certain assetsCustomer relationships and trade name are amortized and the amortization expense is recorded in sales and marketing expenses in the consolidated statement of Xtera Communications, Inc. (“Xtera”), including certain load balancing solutionsoperations. Developed technologies are amortized and certain patents, for a total considerationthe amortization expense is recorded in cost of $1.8 million,product revenue in the consolidated statement of which $1.7 million was paid in cash on the acquisition date and $0.1 million in cash was contingent upon attainment of revenue milestones. In connection with this acquisition, we acquired net tangible assets of $0.2 million, intangible assets of $1.5 million, and recognized an estimated contingent obligation of $0.1 million payable upon attainment of revenue milestones.operations.

The following table summarizes the combined results of operations of our fiscal 2013 acquisitionsFortinet and Meru as if the acquisition occurred on January 1, 2014. The pro forma results includes purchase accounting adjustments for amortization charges from acquired intangible assets, depreciation of acquired property, plant and equipment, stock-based compensation and related tax effects (in thousands):

 Years Ended December 31,
 2015 2014
Pro forma revenue$1,046,972
 $861,255
Pro forma income (loss) from operations(1,983) 34,105
Pro forma net income (loss)(4,634) 5,968
Pro forma net income (loss) per share:   
Basic(0.03) 0.04
Diluted(0.03) 0.04

The pro forma financial information presented above is for informational purposes only and is not indicative of the results of operations that would have been included in our consolidated statementsachieved if the acquisition had taken place at the beginning of operations from their respective acquisition dates.January 2014, nor it is indicative of any future results.


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7. GOODWILL AND OTHER INTANGIBLE ASSETS—Net

We recorded $2.8 million of goodwill from the acquisition of Coyote. Goodwill

There were no impairments to goodwill during fiscal 2014.2016. The following table presents the changes in the carrying amount of goodwill (in thousands):

 Amount
Balance—December 31, 2015$4,692
Addition due to business acquisition9,861
Balance—December 31, 2016$14,553

Other Intangible Assets—net

The following tables present other intangible assets—net (in thousands):

 December 31, 2016
 Weighted-Average Useful Life (in Years) Gross Accumulated Amortization Net
Other intangible assets—net:       
Finite-lived intangible assets:       
Developed technologies and other3.8 $23,984
 $8,750
 $15,234
Customer relationships4.7 14,500
 6,506
 7,994
   38,484
 15,256
 23,228
        
Indefinite-lived intangible assets:       
In-process research and development  1,600
 
 1,600
Total other intangible assets—net  $40,084
 $15,256
 $24,828

 December 31, 2015
 Weighted-Average Useful Life (in Years) Gross Accumulated Amortization Net
Other intangible assets—net:       
Customer relationships5.0 $12,200
 $1,220
 $10,980
Developed technologies3.6 11,384
 4,724
 6,660
Total other intangible assets—net  $23,584
 $5,944
 $17,640

During fiscal 2014,2015, we reassessed the fair value and the remaining useful life of the developed technologies and customer relationships acquired from Coyote.the Coyote business acquisition. Based on this reassessment, we determined a decrease in the projected cash flow and that the remaining net book value of the developed technologies and customer relationships were impaired. As a result, we recorded an impairment charge of $2.4$1.6 million to adjust the total fair value of the other intangible assets to $2.0 million.associated with these assets. The impairment charge is included within Costcost of product revenue and sales and marketing in the consolidated statements of operations.

The following tables present other intangible assets—net (in thousands):

 December 31, 2014
 Weighted-Average Useful Life (in Years) Gross Accumulated Amortization Net
Other intangible assets—net:       
Developed technology3.6 $5,606
 $3,128
 $2,478
Customer relationships6.0 500
 146
 354
Total other intangible assets—net  $6,106
 $3,274
 $2,832


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 December 31, 2013
 Weighted-Average Useful Life (in Years) Gross Accumulated Amortization Net
Other intangible assets—net:       
Developed technology4.6 $8,971
 $2,568
 $6,403
Customer relationships6.0 500
 62
 438
Total other intangible assets—net  $9,471
 $2,630
 $6,841

Amortization expense was $1.59.3 million, $1.7$3.2 million, and $1.0$1.5 million in fiscal2016, 2015 and 2014, fiscal 2013 and fiscal 2012, respectively. The following table summarizes estimated future amortization expense of Otherother intangible assets—net for future fiscal years (in thousands):

AmountAmount
Fiscal Years: 
2015$1,091
2016785
Years: 
2017425
$8,574
2018425
6,885
2019106
5,406
20202,363
Total$2,832
$23,228


8. NET INCOME PER SHARE

Basic net income per share is computed by dividing net income by the weighted-average number of shares of common stock outstanding during the period. Diluted net income per share is computed by dividing net income by the weighted-average number of shares of common stock outstanding, plus the dilutive effects of RSUs, including PSUs, stock options RSUs, and the ESPP. Dilutive shares of common stock are determined by applying the treasury stock method.























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A reconciliation of the numerator and denominator used in the calculation of basic and diluted net income per share is as follows (in thousands, except per share amounts):
 
Year Ended December 31,Year Ended December 31,
2014 2013 20122016 2015 2014
Numerator:          
Net income$25,343
 $44,273
 $66,836
$32,187
 $7,987
 $25,343
          
Denominator:          
Basic shares:          
Weighted-average common stock outstanding-basic163,831
 162,435
 158,074
172,621
 170,385
 163,831
Diluted shares:          
Weighted-average common stock outstanding-basic163,831
 162,435
 158,074
172,621
 170,385
 163,831
Effect of potentially dilutive securities:          
RSUs (including PSUs)1,891
 2,260
 844
Stock options4,583
 5,685
 8,214
1,757
 3,427
 4,583
RSUs844
 35
 
ESPP31
 28
 41
69
 69
 31
Weighted-average shares used to compute diluted net income per share169,289
 168,183
 166,329
176,338
 176,141
 169,289
Net income per share:          
Basic$0.15
 $0.27
 $0.42
$0.19
 $0.05
 $0.15
Diluted$0.15
 $0.26
 $0.40
$0.18
 $0.05
 $0.15


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The following weighted-average shares of common stock were excluded from the computation of diluted net income per share for the periods presented, as their effect would have been antidilutive (in thousands):
 
 Year Ended December 31,
 2014 2013 2012
Stock options3,469
 7,397
 7,183
RSUs768
 2,774
 291
ESPP99
 419
 321
 4,336
 10,590
 7,795

9. DEFERRED REVENUE
 Year Ended December 31,
 2016 2015 2014
RSUs (including PSUs)3,319
 1,393
 768
Stock options1,024
 382
 3,469
ESPP159
 94
 99
 4,502
 1,869
 4,336

Deferred revenue consisted
9. RESTRUCTURING CHARGES

The following table provides a summary of restructuring activity for the followingyears 2016 and 2015 (in thousands):

 December 31,
2014
 December 31,
2013
Product$4,642
 $2,915
Services and other554,115
 429,713
Total deferred revenue$558,757
 $432,628
Reported As:   
Current$368,929
 $293,664
Non-current189,828
 138,964
Total deferred revenue$558,757
 $432,628
 Employee Severance and Other Benefits Contract Terminations and Other Charges Total
Balance as of December 31, 2014$
 $
 $
Costs incurred7,109
 491
 7,600
Less cash payments(3,104) (71) (3,175)
Less non-cash items(316) (191) (507)
Balance as of December 31, 20153,689
 229
 3,918
Costs incurred3,246
 751
 3,997
Less cash payments(5,933) (664) (6,597)
Less non-cash items(89) (78) (167)
Balance as of December 31, 2016$913
 $238
 $1,151

2016 Restructuring

In 2016, we implemented a plan to restructure and further improve efficiencies in our operations due to the acquisition of AccelOps and certain other activities. To date, we have incurred $3.7 million related to this restructuring. These charges are primarily related to severance payments to be paid in cash and are included in operating expense in the consolidated statements of operations. We do not anticipate incurring additional significant charges related to this restructuring.

The remaining restructuring reserve of $0.5 million is included in accrued liabilities on the consolidated balance sheet as of December 31, 2016 and is expected to be paid in 2017.

2015 Meru Restructuring

In connection with the acquisition of Meru, we initiated planned cost reduction and restructuring activities to improve our cost structure and operational efficiencies starting in the third quarter of 2015. To date, we have incurred $7.9 million of charges related to this restructuring. These charges are primarily related to severance payments to be paid in cash and are included in operating expense in the consolidated statements of operations of the period when incurred. We incurred $0.3 million of charges related to this restructuring during the twelve months ended December 31, 2016, respectively, and these charges are included in operating expense in the consolidated statements of operations. We do not anticipate incurring additional charges related to this restructuring.

The remaining restructuring reserve of $0.7 million is included in accrued liabilities on the consolidated balance sheet as of December 31, 2016 and is expected to be paid in 2017.


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10. COMMITMENTS AND CONTINGENCIES

The following table summarizes our future principal contractual obligations as of December 31, 20142016 (in thousands):

Total 2015 2016 2017 2018 2019 ThereafterTotal 2017 2018 2019 2020 2021 Thereafter
Operating lease commitments$42,624
 $11,535
 $9,265
 $7,368
 $6,732
 $4,726
 $2,998
$65,489
 $17,699
 $14,103
 $11,933
 $9,474
 $4,003
 $8,277
Less: Sublease rental income431
 431
 
 
 
 
 
Operating lease commitments—net42,193
 11,104
 9,265
 7,368
 6,732
 4,726
 2,998
Inventory purchase commitments62,804
 62,804
 
 
 
 
 
91,247
 91,247
 
 
 
 
 
Other contractual commitments21,006
 18,169
 1,861
 976
 
 
 
Other contractual commitments and open purchase orders50,686
 45,953
 3,776
 693
 264
 
 
Total$126,003
 $92,077
 $11,126

$8,344

$6,732

$4,726

$2,998
$207,422
 $154,899
 $17,879

$12,626

$9,738

$4,003

$8,277

Operating Leases—We lease certain facilities under various non-cancelable operating leases, which expire through 2024. Certain leases require us to pay variable costs such as taxes, maintenance, and insurance. The terms of certain operating leases also provide for renewal options and escalation clauses. Rent expense was $18.9 million, $13.8 million and $10.6 million $9.8 millionfor 2016, 2015 and $8.7 million for fiscal 2014, fiscal 2013, and fiscal 2012, respectively. Rent expense is recognized using the straight-line method over the term of the lease.
    
Contract Manufacturer and OtherInventory Purchase Commitments—Our independent contract manufacturers procure components and build our products based on our forecasts. These forecasts are based on estimates of future demand for our products, which are in turn based on historical trends and an analysis from our sales and marketing organizations, adjusted for overall market conditions. In order to reduce manufacturing lead times and plan for adequate component supply, we may issue purchase orders to some of our independent contract manufacturers which may not be cancelable. As of December 31, 2014,2016, we had $62.8$91.2 million of open purchase orders with our independent contract manufacturers that may not be cancelable.
 
Other Contractual Commitments and Open Purchase OrdersIn addition to commitments with contract manufacturers, we have open purchase orders and contractual obligations in the ordinary course of business for which we have not received goods or services. As of December 31, 2014,2016, we had $21.0$50.7 million in other contractual commitments.commitments that may not be cancelable.

Litigation—We are involved in disputes, litigation, and other legal actions. For lawsuits where we are the defendant, we are in the process of defending these litigation matters, and while there can be no assurances and the outcome of these matters is currently not determinable, we currently believe that there are no existing claims or proceedings that are likely to have a material adverse effect on our financial position. There are many uncertainties associated with any litigation and these actions or other third-party claims against us may cause us to incur costly litigation orfees, including contingent legal fees with related parties, costs and substantial settlement charges.charges, and possibly subject us to damages and other penalties. In addition, the resolution of any intellectual property litigation may require us to make royalty payments, which could adversely affect our gross margins in future periods. If any of those events were to occur, our business, financial condition, results of operations, and cash flows could be adversely affected. The actual liability in any such matters may be materially different from our estimates, if any, which could result in the need to adjust the liability and record additional expenses. WeAs required under ASC 450, Contingencies, issued by the FASB, we accrue for contingencies when we believe that a loss is probable and that we can reasonably estimate the amount of any such loss. With respect to outstanding legal proceedings, including the matter described below, we have not recorded any significant accrualaccruals for loss contingencies associated with such legal proceedings; determinedproceedings, based on our belief that an unfavorable outcomeany potential loss, while reasonably possible, is not probable or reasonably possible; or determined that the amount orand estimable. Further, a possible range of any possible loss in this matter cannot be reasonably estimated at this time. We currently believe we have reasonable defenses with respect to legal proceedings against us.

In October 2016, we received a letter from the United States Attorney's Office for the Northern District of California requesting information relating to our compliance with the Trade Agreements Act. This inquiry is reasonably estimable.ongoing and we are fully cooperating with this inquiry. 

In December 2015, we received $9.0 million from a third-party for a release of claims. In addition, we agreed to a three-year covenant-not-to-sue. Of the $9.0 million consideration received, $2.0 million was used to offset contingent legal fees incurred in connection with the litigation and the remaining $7.0 million was deferred, with the short-term portion recorded as

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accrued liabilities and the long-term portion recorded as other liabilities in the consolidated balance sheet. The deferral will be recognized ratably through 2018 as an offset to general and administrative expenses in the consolidated statement of operations.

Indemnification—Under the indemnification provisions of our standard sales contracts, we agree to defend our customers against third-party claims asserting various allegations such as product defects and infringement of certain intellectual property rights, which may include patents, copyrights, trademarks or trade secrets, and to pay judgments entered on such claims. OurIn some contracts, our exposure under these indemnification provisions is generally limited by the terms of ourthe contracts to certain defined limits, such as the total amount paid by our customer under the agreement. However, certain agreements include covenants, penalties and indemnification provisions including and beyond indemnification for third-party claims of intellectual property infringement and that could potentially expose us to losses in excess of the amount received under the agreement, and in some instances to potential liability that is not contractually limited. To date, there have been no awards under such indemnification provisions.



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11. STOCKHOLDERS’ EQUITY

Stock-Based Compensation Plans

Our stock-based compensation plans include the 2000 Stock Plan (the “2000 Plan”), the 2008 Stock Plan (the “2008 Plan”), the 2009 Equity Incentive Plan (the “2009 Plan”), and the 2011 Employee Stock Purchase Plan (the “ESPP”).ESPP, as well as an equity plan assumed through the Meru acquisition. Under these plans, we have granted (or, in the case of the acquired plan, we have assumed) stock options and RSUs, including PSUs.

2000 Stock PlanPlansIn 2000, weOur board of directors adopted the 2000 Plan which includesin 2000 and the 2008 Plan in 2008. The plans include both incentive and non-statutory stock options. Under the 2000 Plan, we mayoptions, which allowed us to grant options to purchase up to 21.5 million shares of common stock to employees, directors, and other service providers at prices not less than the fair market value at date of grant for incentivecontractors. During 2016, 2015 and 2014, we issued no stock options and not less than 85%under these plans. As of fair market valueDecember 31, 2015, no shares remain available for non-statutory options. Options granted to a person who, at the time of the grant owns more than 10% of the voting power of all classes of stock shall be at no less than 110% of the fair market value and expire five years from the date of grant. All other options generally have a contractual term of 10 years. Options generally vest over four years.

2008 Stock Plan—In 2008, our board of directors approved the 2008 Plan, which includes both incentive and non-statutory stock options. The maximum aggregate number of shares which may be subject to options and sold under the 2008 Plan is 5.0 million shares, plus any shares that, as of the date of stockholder approval of the 2008 Plan, have been reserved but not issued under the 2000 Plan or shares subject to stock options or similar awards granted under the 2000 Plan that expire or otherwise terminate without having been exercised in full or that are forfeited to or repurchased by us.

Under the 2008 Plan, we may grant options to employees, directors and other service providers. In the case of an incentive stock option granted to an employee, who at the time of grant, owns stock representing more than 10% of the total combined voting power of all classes of stock, the exercise price shall be no less than 110% of the fair market value per share on the date of grant and expire five years from the date of grant, and options granted to any other employee, the per share exercise price shall be no less than 100% of the fair market value per share on the date of grant. In the case of a nonstatutory stock option and options granted to other service providers, the per share exercise price shall be no less than 100% of the fair market value per share on the date of grant.these plans.

2009 Equity Incentive Plan—In 2009, our board of directors approved the 2009 Plan, which includes awards of stock options, stock appreciation rights, restricted stock, RSUs and Performance Stock Units (“PSUs”).PSUs. The maximum aggregate number of shares that may be issued under the 2009 Plan is 9.0 million shares, plus any shares subject to stock options or similar awards granted under the 2008 Plan and the 2000 Plan that expire or otherwise terminate without having been exercised in full and shares issued pursuant to awards granted under the 2008 Plan and the 2000 Plan that are forfeited to or repurchased by us, with the maximum number of shares to be added to the 2009 Plan pursuant to such terminations, forfeitures and repurchases not to exceed 21.0 million shares. The shares may be authorized but unissued or reacquired, common stock. The number of shares available for issuance under the 2009 Plan will beis increased on the first day of each fiscal year beginning with fiscal 2011, in an amount equal to the lesser of (i) 7.014.0 million shares (as adjusted in connection with the stock split effected in June 2011), (ii) five percent (5%) of the outstanding shares on the last day of the immediately preceding fiscal year or (iii) such number of shares determined by our board of directors. Under the 2009 Plan, we may grant awards to employees, directors and other service providers. In the case of an incentive stock option granted to an employee who, at the time of the grant, owns stock representing more than 10% of the voting power of all classes of stock, the exercise price shall be no less than 110% of the fair market value per share on the date of grant and expire five years from the date of grant, and options granted to any other employee, the per share exercise price shall be no less than 100% of the fair market value per shareclosing stock price on the date of grant. In the case of a non-statutory stock option and options granted to other service providers, the per share exercise price shall be no less than 100% of the fair market value per share on the date of grant. Options granted to individuals owning less than 10% of the total combined voting power of all classes of stock generally have a contractual term of seven years and options generally vest over four years.

As of December 31, 2014, a total of 49.4 million shares were authorized and available for issuance under the 2000 Plan, 2008 Plan and 2009 Plan.

2011 Employee Stock Purchase Plan—In June 2011, our stockholders approved the ESPP. The ESPP permits eligible employees to purchase common stock through regular, systematic payroll deductions, up to a maximum of 15% of employees’ compensation for each purchase period at purchase prices equal to 85% of the lesser of the fair market value of our common stock at the first trading date of the applicable offering period or the purchase date. Asdate, subject to purchase limits of December 31, 2014, 6.0 million4,000 shares were authorized and available for future issuance under the ESPP.each purchase period or $25,000 worth of stock for each calendar year.

Meru 2010 Equity Incentive Plan—In connection with the Meru acquisition, we assumed and exchanged Meru’s outstanding RSUs with an estimated fair value of $2.0 million. Of the total estimated fair value, $0.5 million relating to earned equity awards was allocated to the purchase price and the remainder relating to future services is being recognized over the

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Employee Stock Optionsremaining service period. No new equity awards can be granted under the assumed plan. As of December 31, 2016, RSUs representing 4,199 shares of common stock were outstanding under the awards assumed through the acquisition of Meru.

In determining the fair valueAs of our employeeDecember 31, 2016, there were a total of 44,377,942 shares of common stock options, we use the Black-Scholes option pricing model, which employs the following assumptions.

Valuation method—We estimate the fair value of stock options granted.

Expected Term—The expected term represents the period thatavailable for grant under our stock-based awards are expected to be outstanding. Beginning in the first quarter of fiscal 2014, we changed the methodology of calculating the expected term. We believe that we have sufficient historical experience for determining the expected term of the stock option award, and therefore, we calculated our expected term based on historical experience instead of using the simplified method.

Expected Volatility—The expected volatility of our common stock has been historically based on the weighted-average implied and historical volatility of our and our peer group. The peer group is comprised of comparable companies in the same industry sector. As we gained more historical volatility data, the weighting of our own data in the expected volatility calculation associated with options gradually increased to 100% by the fourth quarter of fiscal 2014.

Fair Value of Common Stock—The fair value of our common stock is the closing sales price of the common stock (or the closing bid, if no sales were reported) on the effective on the date of grant.

Risk-Free Interest Rate—We base the risk-free interest rate used in the Black-Scholes valuation model on the implied yield available on U.S. Treasury zero-coupon issues with an equivalent remaining term.

Expected Dividend—The expected dividend weighted-average assumption is zero.

The following table summarizes the weighted-average assumptions relating to our employee stock options:
 Year Ended December 31,
 2014 2013 2012
Expected term in years4.8
 4.6
 4.6
Volatility41% – 45%
 45% – 48%
 46% – 52%
Risk-free interest rate1.6% – 1.7%
 1.2% 0.7% – 0.9%
Dividend rate% % %






















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The following table summarizes the stock option activity and related information for the periods presented below (in thousands, except exercise prices and contractual life):
 Options Outstanding
 
Number
of Shares
 
Weighted-
Average
Exercise
Price
 
Weighted-
Average
Remaining
Contractual
Life (Years)
 
Aggregate
Intrinsic
Value
Balance—December 31, 201121,389
 $9.14
    
Granted3,401
 26.38
    
Forfeited(1,441) 19.31
    
Exercised(4,778) 5.69
    
Balance—December 31, 201218,571
 12.40
    
Granted258
 20.89
    
Forfeited(820) 22.14
    
Exercised(2,488) 5.18
    
Balance—December 31, 201315,521
 13.18
   

Granted387
 23.08
    
Forfeited(443) 24.21
    
Exercised(4,763) 8.91
    
Balance—December 31, 201410,702
 $14.98
    
Options vested and expected to vest—December 31, 201410,668
 $14.96
 2.71 $167,477
Options exercisable—December 31, 20149,125
 $13.45
 2.38 $157,027

The aggregate intrinsic value represents the pre-tax difference between the exercise price of stock options and the quoted market price of our common stock on December 31, 2014, for all in-the-money options. As of December 31, 2014, total compensation expense related to unvested stock options granted to employees but not yet recognized was $17.6 million, net of estimated forfeitures. This expense is expected to be amortized on a straight-line basis over a weighted-average period of 1.5 years.

Additional information related to our stock options is summarized below (in thousands, except per share amounts):

 Year Ended December 31,
 2014 2013 2012
Weighted-average fair value per share granted$8.90
 $8.42
 $11.13
Intrinsic value of options exercised76,731
 41,484
 92,323
Fair value of options vested17,098
 26,411
 25,350


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The following table summarizes information about outstanding and exercisable stock options as of December 31, 2014, as follows (in thousands, except exercise prices and contractual life):
  Options Outstanding Options Exercisable
Range of Exercise Prices 
Number
Outstanding
 
Weighted-
Average
Remaining
Contractual
Life (Years)
 
Weighted-
Average
Exercise
Price
 
Number
Exercisable
 
Weighted-
Average
Exercise
Price
$0.98–$1.20 646
 1.17 $1.04
 642
 $1.04
3.74–4.65 2,844
 0.80 3.75
 2,844
 3.75
5.50–6.25 83
 1.82 5.66
 83
 5.66
8.43–8.99 1,050
 2.19 8.53
 1,049
 8.53
15.28–19.94 177
 3.52 16.33
 143
 15.52
20.13–24.92 3,884
 3.75 21.32
 2,988
 21.10
26.49–26.70 2,018
 4.18 26.69
 1,376
 26.70

 10,702
     9,125
 

plans.

Restricted Stock Units

The following table summarizes the activity and related information for RSUs for the periods presented below (in thousands, except per share amounts):

Restricted Stock Units OutstandingRestricted Stock Units Outstanding
Number of Shares Weighted-Average Grant-Date-Fair Value per ShareNumber of Shares Weighted-Average Grant Date Fair Value per Share
Balance—December 31, 2011
 $
Granted873
 23.79
Forfeited(43) 24.76
Vested
 
Balance—December 31, 2012830
 23.73
Granted4,104
 21.75
Forfeited(507) 21.48
Vested(228) 23.89
Balance—December 31, 20134,199
 22.00
4,199
 $22.00
Granted4,047
 23.13
4,047
 23.13
Forfeited(472) 21.92
(472) 21.92
Vested(1,483) 22.23
(1,483) 22.23
Balance—December 31, 20146,291
 $22.93
6,291
 22.93
RSUs expected to vest—December 31, 20145,933
 $22.90
Granted6,303
 39.04
Forfeited(1,029) 31.78
Vested(2,308) 22.74
Balance—December 31, 20159,257
 32.97
Granted5,551
 27.96
Forfeited(1,673) 32.03
Vested(3,626) 30.45
Balance—December 31, 20169,509
 $31.01

As of December 31, 2014,2016, total compensation expense related to unvested RSUs that were granted to employees and non-employees under the 2009 Plan, but not yet recognized, was $136.4 million, net of estimated forfeitures.$251.5 million. This expense is expected to be amortized on a straight-line basis over a weighted-average vesting period of 2.922.73 years.

RSUs settle into shares of common stock upon vesting. Upon the vesting of the RSUs, we net-settle the RSUs and withhold a portion of the shares to satisfy minimum statutory employee withholding taxes. Total payment for the employees’ tax obligations to the taxing authorities is reflected as a financing activity within the consolidated statements of cash flows.


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The following summarizes the number and value of the shares withheld for employee taxes (in thousands):

Year Ended December 31,Year Ended December 31,
2014 2013 20122016 2015 2014
Shares withheld for taxes461
 70
 
1,203
 761
 461
Amount withheld for taxes$10,598
 $1,452
 $
$38,266
 $28,871
 $10,598

PerformanceEmployee Stock UnitsOptions

During fiscal 2014, we granted PSUs to certainIn determining the fair value of our executive officers. Based onemployee stock options, we use the achievementBlack-Scholes option pricing model, which employs the following assumptions.


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Expected Term—The expected term represents the period that our stock-based awards are expected to be outstanding. We believe that we have sufficient historical experience for determining the expected term of the market-based vesting conditions during the performance period, the final settlement of the PSUs will range between 0%stock option award, and 150% of the target shares underlying the PSUstherefore, we calculated our expected term based on a specified objective formula approved by our Compensation Committee. historical experience instead of using the simplified method.

Expected VolatilityThe PSUs entitle our executive officers to receive a number of sharesexpected volatility of our common stock is based on the performanceour weighted-average implied and historical volatility.

Fair Value of Common Stock—The fair value of our common stock is the closing sales price over a two- or three-year period as compared toof the NASDAQ Composite index forcommon stock effective on the same periods.date of grant.

Risk-Free Interest Rate—We base the risk-free interest rate on the implied yield available on U.S. Treasury zero-coupon issues with an equivalent remaining term.

Expected Dividend—The expected dividend weighted-average assumption is zero.

The following table summarizes the weighted-average assumptions relating to our PSUs:employee stock options:
 
Year Ended December 31,Year Ended December 31,
2014 20132016 2015 2014
Expected term in years3.0
 3.0
4.3
 4.3
 4.8
Volatility46.3% 50.1%42% 39% 43%
Risk-free interest rate0.9% 0.7%1.1% 1.6% 1.6%
Dividend rate% %% % %

We granted 0.1 million PSUs during fiscal 2014 to our executive officers. The PSUs had a grant date fair value of $21.05 per share,following table summarizes the stock option activity and are included inrelated information for the aforementioned activity for RSUs. We granted 0.2 million PSUs during fiscal 2013, of which 0.1 million shares were forfeited during fiscal 2013. The PSUs had a grant date fair value of $22.06 per share. No PSUs were granted in fiscal 2012.periods presented below (in thousands, except exercise prices and contractual life):
 Options Outstanding
 
Number
of Shares
 
Weighted-
Average
Exercise
Price
 
Weighted-
Average
Remaining
Contractual
Life (Years)
 
Aggregate
Intrinsic
Value
Balance—December 31, 201315,521
 $13.18
    
Granted387
 23.08
    
Forfeited(443) 24.21
    
Exercised(4,763) 8.91
    
Balance—December 31, 201410,702
 14.98
    
Granted819
 39.50
    
Forfeited(150) 28.67
    
Exercised(4,403) 11.10
    
Balance—December 31, 20156,968
 20.03
   

Granted1,468
 25.65
    
Forfeited(268) 34.82
    
Exercised(1,981) 10.45
    
Balance—December 31, 20166,187
 $23.79
    
Options vested and expected to vest—December 31, 20166,187
 $23.79
 3.08 $45,168
Options exercisable—December 31, 20164,313
 $21.94
 1.85 $37,299

The aggregate intrinsic value represents the pre-tax difference between the exercise price of stock options and the quoted market price of our common stock on December 31, 2016, for all in-the-money options. As of December 31, 2014,2016, total

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compensation expense related to unvested PSUs that werestock options granted to certain of our executive officers,employees but not yet recognized was $3.2 million, net of estimated forfeitures.$15.0 million. This expense is expected to be amortized on a straight-line basis over a weighted-average vesting period of 2.002.8 years.

Additional information related to our stock options is summarized below (in thousands, except per share amounts):

 Year Ended December 31,
 2016 2015 2014
Weighted-average fair value per share granted$9.14
 $13.20
 $8.90
Intrinsic value of options exercised40,306
 113,786
 76,731
Fair value of options vested5,444
 10,943
 17,098

The following table summarizes information about outstanding and exercisable stock options as of December 31, 2016, as follows (in thousands, except exercise prices and contractual life):
  Options Outstanding Options Exercisable
Range of Exercise Prices 
Number
Outstanding
 
Weighted-
Average
Remaining
Contractual
Life (Years)
 
Weighted-
Average
Exercise
Price
 
Number
Exercisable
 
Weighted-
Average
Exercise
Price
$8.43–8.99 554
 0.19 $8.52
 554
 $8.52
15.28–19.94 110
 1.77 16.74
 100
 16.43
20.13–24.92 3,381
 3.22 22.00
 2,187
 21.08
26.49–26.70 1,248
 2.18 26.69
 1,226
 26.70
31.39–33.31 627
 5.88 32.75
 144
 32.92
38.73–48.83 267
 5.46 46.59
 102
 46.25
  6,187
     4,313
  


Employee Stock Purchase Plan

In determining the fair value of our ESPP, we use the Black-Scholes option pricing model that employs the following weighted-average assumptions:

 Year Ended December 31,
 2016 2015 2014
Expected term in years0.5
 0.5
 0.5
Volatility39% 30% 34%
Risk-free interest rate0.4% 0.2% 0.1%
Dividend rate% % %

Additional information related to the ESPP is provided below (in thousands, except per share amounts):

 Year Ended December 31,
 2016 2015 2014
Weighted-average fair value per share granted$7.68
 $9.56
 $5.91
Shares issued under the ESPP1,151
 764
 770
Weighted-average price per share issued$21.01
 $24.30
 $18.17


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Shares Reserved for Future Issuances

The following table presents the common stock reserved for future issuance (in thousands):

 December 31,
20142016
Outstanding stock options and RSUs16,99315,696
Reserved for future stock option, RSU and other equity award grants32,43140,312
Reserved for future ESPP issuances5,9814,066
Total common stock reserved for future issuances55,40560,074








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Employee Stock Purchase Plan

In determining the fair value of our ESPP, we use the Black-Scholes option pricing model that employs the following weighted-average assumptions:

 Year Ended December 31,
 2014 2013 2012
Expected term in years0.5
 0.5
 0.5
Volatility34.1% 44.0% 53.7%
Risk-free interest rate0.1% 0.1% 0.1%
Dividend rate% % %

Additional information related to the ESPP is provided below (in thousands, except per share amounts):

 Year Ended December 31,
 2014 2013 2012
Weighted-average fair value per share granted$5.91
 $6.11
 $7.06
Shares issued under the ESPP770
 672
 577
Weighted-average price per share issued$18.17
 $18.88
 $18.90

Stock-based Compensation Expense

Stock-based compensation expense is included in costs and expenses as follows (in thousands):
Year Ended December 31,Year Ended December 31,
2014 2013 20122016 2015 2014
Cost of product revenue$483
 $383
 $333
$1,200
 $973
 $483
Cost of services and other revenue5,826
 4,841
 3,736
Cost of service revenue8,771
 7,121
 5,826
Research and development17,264
 13,271
 9,226
30,120
 24,555
 17,264
Sales and marketing26,744
 19,526
 12,793
68,113
 49,436
 26,744
General and administrative8,677
 6,450
 4,602
14,219
 13,003
 8,677
Total stock-based compensation expense$58,994
 $44,471
 $30,690
$122,423
 $95,088
 $58,994

The following table summarizes stock-based compensation expense by award type (in thousands):
Year Ended December 31,Year Ended December 31,
2014 2013 20122016 2015 2014
RSUs$107,124
 $77,262
 $37,068
Stock options$17,555
 $20,806
 $24,506
6,596
 11,425
 17,555
RSUs37,068
 18,968
 1,714
ESPP4,371
 4,697
 4,470
8,703
 6,401
 4,371
Total stock-based compensation expense$58,994
 $44,471
 $30,690
$122,423
 $95,088
 $58,994

Total income tax benefit associated with stock-based compensation that is recognized in the consolidated statements of operations is as follows (in thousands):
 Year Ended December 31,
 2014 2013 2012
Income tax benefit associated with stock-based compensation$11,086
 $8,331
 $5,870
 Year Ended December 31,
 2016 2015 2014
Income tax benefit associated with stock-based compensation$29,190
 $25,189
 $11,086



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Share Repurchase Program

On December 6, 2013,In January 2016, our Boardboard of Directors authorized a Sharedirectors approved the 2016 Repurchase Program (“which authorizes the Program”) to repurchase of up to $200.0 million of our outstanding common stock through December 31, 2014.2017. In October 2016, our board of directors authorized the purchase of an additional $100.0 million of shares of our common stock under the 2016 Repurchase Program, increasing our current authorization to $300.0 million through December 31, 2017. Under the 2016 Repurchase Program, share repurchases may be made by us from time to time in privately negotiated transactions or in open market transactions. The 2016 Repurchase Program does not require us to purchase a minimum number of shares, and may be suspended, modified or discontinued at any time without prior notice. On October 17, 2014, our board of directors extended the share repurchase authorization under the Program through December 31, 2015. In fiscal 2014,2016, we repurchased 1.63.9 million shares of common stock under the 2016 Repurchase Program in open market transactions for an aggregate purchase price of $38.6$110.8 million. As of December 31, 2014, $122.52016, $189.2 million remainsremained available for future share repurchases under the 2016 Repurchase Program.

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12. INCOME TAXES

Income before income taxes consisted of the following (in thousands):

Year Ended December 31,Year Ended December 31,
2014 2013 20122016 2015 2014
Domestic$35,778
 $83,076
 $95,730
$(49,707) $(37,437) $35,778
Foreign25,771
 (7,135) 9,266
92,855
 54,442
 25,771
Total income before income taxes$61,549
 $75,941
 $104,996
$43,148
 $17,005
 $61,549

The provision for income taxes consisted of the following (in thousands):
 
Year Ended December 31,Year Ended December 31,
2014 2013 20122016 2015 2014
Current:          
Federal$17,717
 $43,384
 $43,765
$7,904
 $9,864
 $17,717
State1,110
 2,490
 1,992
803
 (136) 1,110
Foreign8,921
 4,175
 2,266
17,829
 13,683
 8,921
Total current$27,748
 $50,049
 $48,023
$26,536
 $23,411
 $27,748
Deferred:          
Federal$6,742
 $(17,149) $(9,677)$(10,037) $(9,383) $6,742
State(36) (1,232) (186)(4,861) (2,988) (36)
Foreign1,752
 
 
(677) (2,022) 1,752
Total deferred8,458
 (18,381) (9,863)(15,575) (14,393) 8,458
Provision for income taxes$36,206
 $31,668
 $38,160
$10,961
 $9,018
 $36,206
 













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The provision for income taxes differs from the amount computed by applying the statutory federal income tax rate as follows (in thousands):
Year Ended December 31,Year Ended December 31,
2014 2013 20122016 2015 2014
Tax at federal statutory tax rate$21,542
 $26,579
 $36,749
$15,096
 $5,951
 $21,542
Stock-based compensation expense7,367
 4,571
 1,570
10,010
 6,369
 7,367
State taxes—net of federal benefit975
 419
 1,186
(4,252) (2,454) 975
Domestic production activities deduction
 (3,256) (1,813)
Foreign tax credit(4,433) (2,853) (2,348)(34,992) (6,901) (4,433)
Research and development credit(880) (1,650) (144)(2,713) (3,529) (880)
Foreign income taxed at different rates(406) 2,927
 (1,626)(13,681) (11,225) (406)
Foreign withholding taxes9,085
 6,622
 2,185
14,998
 10,962
 9,085
Foreign dividend distribution27,295
 9,647
 
Other2,956
 (1,691) 2,401
(800) 198
 2,956
Total provision for income taxes$36,206
 $31,668
 $38,160
$10,961
 $9,018
 $36,206

Significant permanent differences arise from the portion of stock-based compensation expense that is not expected to generate a tax deduction, such as stock-based compensation expense on stock option grants to certain foreign employees, offset by the actual tax benefits in the current periods from disqualifying dispositions of shares held by our U.S. employees. For stock options exercised by our U.S. employees, we receive an income tax benefit calculated as the difference between the fair market value of the stock issued at the time of the exercise and the option price, tax effected. In 2016, we early adopted ASU 2016-09 and all the excess tax benefits were recognized in income tax provision. For fiscal2015, income tax payable was reduced by excess tax benefits from the exercise or vesting of stock-based awards of $1.3 million. For 2014, income tax payable was not reduced

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by excess tax benefits from the exercise or vesting of stock-based awards, therefore we did not recognize a significant benefit in additional paid-in-capital. The

During 2016, we repatriated $55.0 million of foreign earnings and profits. A decision was made to bring this cash back to the U.S. as it carried a foreign tax credit of $22.3 million.

Our 2015 income tax benefitsprovision reflected a $1.2 million tax benefit due to a recent U.S. Tax Court opinion involving an independent third party filed on July 27, 2015. Based on the findings of the U.S. Tax Court, we recognized the tax benefit for fiscal 2013 and fiscal 2012 associated with dispositionsexcluding the share-based compensation from employee stock transactions of $3.5 million, and $14.3 million, respectively, were recognized as additional paid-in capital because it reduced income taxes payable.intercompany charges in prior periods.

AsDuring 2015, we completed a corporate reorganization to convert our Canadian company to a branch of December 31, 2014, we did not recognize federal and Californiaour U.S. company resulting on a $27.6 million deemed dividend distribution. The tax impact of the Canadian deemed dividend distribution of $9.6 million was partially offset by an additional tax benefit of $6.4 million due to the deferred tax assets related to stock-basedbenefit of the Canadian stock based compensation excess tax benefits of $6.5 million and $3.3 million, respectively. Unrecognized excess tax benefits will be accounted for as a credit to additional paid-in capital when realized through a reduction in income taxes payable.expense.

The tax effects of temporary differences that give rise to significant portions of the deferred tax assets as of the years ended are presented below (in thousands):
 
December 31,
2014
 December 31,
2013
December 31,
2016
 December 31,
2015
Deferred tax assets:      
Net operating loss carryforward$1,293
 $2,183
$24,348
 $9,757
Deferred revenue31,545
 47,341
41,877
 39,509
Nondeductible reserves and accruals20,904
 16,055
27,029
 22,240
Depreciation and amortization193
 (465)5,776
 2,873
General business credit carryforward2,155
 439
62,705
 22,121
Stock-based compensation expense16,463
 15,468
20,943
 22,714
Other11
 17
67
 2
Total deferred tax assets$72,564
 $81,038
$182,745
 $119,216

In assessing the realizability of deferred tax assets, we considered whether it is more likely than not that some portion or all of our deferred tax assets will be realized. This realization is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. We concluded that it is more likely than not that we would be able to realize the benefits of our deferred tax assets in the future.

As of December 31, 20142016, we had $22.9$44.9 million in federal net operating loss carryforwards to offset future income, that will not expire until 2034.which is limited by Section 382 of the Internal Revenue Code (“Section 382”) due to the acquisition of Meru and AccelOps. With the acquisition of Meru, we had $22.6 million in federal net operating loss carryforwards which is limited by Section 382 available from year 2020. With the acquisition of AccelOps, we had $22.3 million in federal net operating loss carryforwards which is limited by Section 382 available from year 2016. We also had $54.2 million federal tax credits of $5.5 millionwith certain amount available to carryback and claim federal tax

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refunds from prior year.year and the rest available to offset future federal taxes. As of December 31, 2014,2016, we had $6.9$47.3 million in California net operating loss carryforwards, $9.9 million of which can be used to offset future income thatand which will not expire until 2030.2031. With the acquisition of Meru and AccelOps, we also had $22.1 million and $15.3 million in California net operating loss carryforwards, respectively, which is subject to Section 382 limitation. We also had state tax credit carryforwards of $5.2$17.4 million available to offset our future state taxes. The state credits carry forward indefinitely.

Our policy with respect to undistributed foreign subsidiaries’ earnings is to consider those earnings to be indefinitely reinvested and, accordingly, no related provision of U.S. federal and state income taxes has been provided on such earnings. Upon distribution of those earnings in the form of dividends or otherwise, we would be subject to both U.S. income taxes (subject to an adjustment for foreign tax credits) and withholding taxes in the various foreign countries. As of December 31, 2014,2016, we have not recorded U.S. income tax on $21.3$45.4 million of foreign earnings that are deemed to be permanently reinvested overseas.


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We operate under a tax incentive agreement in Singapore, which is effective through December 31, 2023,2021, and may be extended if certain additional requirements are satisfied. The tax incentive agreement is conditional upon our meeting certain employment and investment thresholds. We did not realize any tax savings from the Singapore tax incentives in fiscal 2014 because of net tax losses generated in fiscal 2013 for that jurisdiction.

As of December 31, 2014,2016, we had $44.2$65.5 million of unrecognized tax benefits, of which, if recognized, $43.4$64.1 million would favorably affect our effective tax rate. Our policy is to include accrued interest and penalties related to uncertain tax benefits in income tax expense. As of December 31, 2014, 20132016, 2015 and 2012,2014, accrued interest and penalties were $9.5 million, $5.5 million and $1.7 million, $1.0 million, and $1.5 million, respectively.

The aggregate changes in the balance of unrecognized tax benefits are as follows (in thousands):
Year Ended December 31,Year Ended December 31,
2014 2013 20122016 2015 2014
Unrecognized tax benefits, beginning of year$29,604
 $27,808
 $19,269
$59,672
 $44,151
 $29,604
Gross increases for tax positions related to the current year14,547
 4,713
 7,550
4,837
 17,478
 14,547
Gross increases for tax positions related to the prior year
 405
 1,479
1,762
 8,319
 
Gross decreases for tax positions related to the prior year
 (3,322) (490)
Gross decreases for tax positions related to prior year(737) (9,207) 
Gross decreases for tax positions related to expiration of statute of limitations
 (1,069) 
Unrecognized tax benefits, end of year$44,151
 $29,604
 $27,808
$65,534
 $59,672
 $44,151

As of December 31, 20142016, 20132015 and 2012, $45.12014, $68.6 million, $30.2$60.6 million and $28.8$45.1 million, respectively, of the amounts reflected above were recorded as Income taxes payable—tax liabilities—non-current in our consolidated balance sheet.
 
As of December 31, 20142016, there was no unrecognized tax benefits that we expect would change significantly over the next 12 months.

We file income tax returns in the U.S. federal jurisdiction, and various U.S. state and foreign jurisdictions. The statute of limitations is open for years that generated state net operating loss carryforwards and after 2009 for state jurisdictions. Additionally, we have foreign net operating losses that have an indefinite life. Generally, we are no longer subject to non-U.S. income tax examinations by tax authorities for tax years prior to 2008.2009. We are no longer subject to examination by U.S federal income tax authorities for tax years prior to 2010.2012. We are currently under examination by U.S federal income tax authorities for tax year 2014, 2013 and 2012.


13. DEFINED CONTRIBUTION PLANS

Our tax-deferred savings plan under our 401(k) Plan, permits participating employees to defer a portion of their pre-tax earnings. In Canada, we have a Group Registered Retirement Savings Plan programProgram (the “RRSP”), which permits participants to make tax deductible contributions. Our board of directors approved 50% matching contributions on employee contributions up to 4% of each employee’s eligible earnings. Our matching contributions to the 401(k) Plans and RRSP for fiscal2016, 2015 and 2014 fiscal 2013, and fiscal 2012 were $2.5$4.4 million,, $2.1 $3.5 million and $1.8$2.5 million, respectively.



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14. SEGMENT INFORMATION

Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker in deciding how to allocate resources and in assessing performance. Our chief operating decision maker is our chief executive officer. Our chief executive officer reviews financial information presented on a consolidated basis, accompanied by information about revenue by geographic region for purposes of allocating resources and evaluating financial performance. We have one business activity, and there are no segment managers who are held accountable for operations, operating results and plans for levels or components below the consolidated unit level. Accordingly, we have determined that we have one operating segment, and therefore, one reportable segment.

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Revenue by geographic region is based on the billing address of the customer. The following tables set forth revenue and property and equipmentequipment—net by geographic region (in thousands):
 
Year Ended December 31,Year Ended December 31,
Revenue2014 2013 20122016 2015 2014
Americas:          
United States$200,294
 $162,327
 $145,369
U.S.$332,194
 $279,564
 $200,294
Canada138,486
 101,594
 81,968
Other Americas124,365
 90,459
 71,687
66,026
 54,124
 42,397
Total Americas324,659
 252,786
 217,056
536,706
 435,282
 324,659
Europe, Middle East, and Africa (“EMEA”)270,537
 208,979
 184,175
Asia Pacific and Japan (“APAC”)175,168
 153,532
 132,408
EMEA477,393
 366,018
 270,537
APAC261,344
 207,968
 175,168
Total revenue$770,364
 $615,297
 $533,639
$1,275,443
 $1,009,268
 $770,364

   
Property and Equipmentnet
December 31,
2014
 December 31,
2013
December 31,
2016
 December 31,
2015
Americas:      
United States$46,116
 $29,334
Canada6,054
 4,372
U.S.$96,414
 $61,064
Other Americas875
 45
13,488
 8,972
Total Americas53,045
 33,751
109,902
 70,036
EMEA3,256
 1,273
EMEA:   
France13,241
 13,201
Other EMEA6,391
 3,977
Total EMEA19,632
 17,178
APAC2,618
 1,628
7,715
 3,853
Total property and equipment—net$58,919
 $36,652
$137,249
 $91,067

15. ACCUMULATED OTHER COMPREHENSIVE LOSS

The following table summarizes the changes in accumulated balances of other comprehensive loss for 2016 and 2015 (in thousands):

 December 31, 2016
 Unrealized Losses on Investments Tax benefit related to items of other comprehensive income or loss Total
Beginning balance$(1,437) $504
 $(933)
Other comprehensive income before reclassifications255
 (89) 166
Amounts reclassified from accumulated other comprehensive income3
 (1) 2
Net current-period other comprehensive income258
 (90) 168
Ending balance$(1,179) $414
 $(765)



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15. ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME
 December 31, 2015
 Unrealized Losses on Investments Tax benefit related to items of other comprehensive income or loss Total
Beginning balance$(540) $191
 $(349)
Other comprehensive loss before reclassifications(896) 313
 (583)
Amounts reclassified from accumulated other comprehensive loss(1) 
 (1)
Net current-period other comprehensive loss(897) 313
 (584)
Ending balance$(1,437) $504
 $(933)

The following table summarizes the changes inAmounts reclassified from accumulated balancesother comprehensive loss for unrealized losses on investments and tax provision related to items of other comprehensive income or loss is recorded in Other expense—net and in Provision for fiscal 2014 and fiscal 2013 (in thousands):income taxes, respectively.

 December 31, 2014
 Foreign Currency Translation Gains and Losses Unrealized Gains and Losses on Investments Tax benefit or provision related to items of other comprehensive income or loss Total
Beginning balance$333
 $1,168
 $(409) $1,092
Other comprehensive loss before reclassifications
 (1,694) 595
 (1,099)
Amounts reclassified from accumulated other comprehensive (loss) income(333) (14) 5
 (342)
Net current-period other comprehensive loss(333) (1,708) 600
 (1,441)
Ending balance$
 $(540) $191
 $(349)


 December 31, 2013
 Foreign Currency Translation Gains and Losses Unrealized Gains and Losses on Investments Tax benefit or provision related to items of other comprehensive income or loss Total
Beginning balance$1,950
 $1,755
 $(614) $3,091
Other comprehensive loss before reclassifications(1,617) (573) 200
 (1,990)
Amounts reclassified from accumulated other comprehensive (loss) income
 (14) 5
 (9)
Net current-period other comprehensive loss(1,617) (587) 205
 (1,999)
Ending balance$333
 $1,168
 $(409) $1,092

The following table provides details about the reclassification out of accumulated other comprehensive (loss) income for fiscal 2014 and fiscal 2013 (in thousands):

December 31, 2014
Details about Accumulated Other Comprehensive Income Components Amount Reclassified from Accumulated Other Comprehensive Income Affected Line Item in the Statement Where Net Income is Presented
Foreign currency translation losses $(333) Other expense—net
Unrealized gains on investments $(14) Other expense—net
Tax provision related to items of other comprehensive income or loss 5
 Provision for income taxes
Total reclassification for the period $(342)  


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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS—(Continued)



December 31, 2013
Details about Accumulated Other Comprehensive Income Components Amount Reclassified from Accumulated Other Comprehensive Income Affected Line Item in the Statement Where Net Income is Presented
Unrealized gains on investments $(14) Other expense—net
Tax provision related to items of other comprehensive income or loss 5
 Provision for income taxes
Total reclassification for the period $(9)  

16. RELATED PARTY TRANSACTIONS

The son of one member of our Boardboard of Directorsdirectors is a partner of an outside law firm that we utilize for certain complex litigation matters. Expenses for legal services provided by the law firm related to matters that arose subsequent to the member joining our Boardboard of Directorsdirectors were $0.4 million, $7.2 million and $1.7 million in 2016, 2015 and $0.12014, respectively. Of such amounts, $2.5 million was incurred under contingent fee arrangements in fiscal 2014 and fiscal 2013, respectively.2015. There were no such legal servicesexpenses incurred under contingent fee arrangements in fiscal 2012.2016 and 2014. Amounts due and payable to the law firm were $1.3$0.1 million and $0.3$5.3 million as of December 31, 20142016 and December 31, 2013,2015, respectively.


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ITEM 9.    Changes in and Disagreements With Accountants on Accounting and Financial Disclosure

None.

ITEM 9A.     Controls and Procedures
 
Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our chief executive officer and chief financial officer, evaluated the effectiveness of our disclosure controls and procedures (as defined in Rule 13a-15(e) or 15d-15(e) under the Exchange Act) as of the end of the period covered by this Annual Report on Form 10-K. In designing and evaluating the disclosure controls and procedures, management recognized that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives. In addition, the design of disclosure controls and procedures must reflect the fact that there are resource constraints and that management is required to apply its judgment in evaluating the benefits of possible controls and procedures relative to their costs.

Based on that evaluation, our chief executive officer and chief financial officer concluded that our disclosure controls and procedures were effective as of December 31, 20142016 to provide reasonable assurance that information we are required to disclose in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in SEC rules and forms, and that such information is accumulated and communicated to our management, including our chief executive officer and chief financial officer, as appropriate, to allow timely decisions regarding required disclosure.

Managements Report on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as defined in Rule 13a-15(f) and 15d-15(f) under the Exchange Act. Management conducted an evaluation of the effectiveness of our internal control over financial reporting based on the framework in Internal Control—Integrated Framework (2013) set forth by the Committee of Sponsoring Organizations of the Treadway Commission.

Based on this evaluation, management concluded that our internal control over financial reporting was effective as of December 31, 20142016. Management reviewed the results of its assessment with our Audit Committee. The effectiveness of our internal control over financial reporting as of December 31, 20142016 has been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in its report, which appears in this Item under the heading “Report of Independent Registered Public Accounting Firm.”

Changes in Internal Control over Financial Reporting

In July 2016, we completed the implementation of a new ERP system. As a result of this implementation, we modified certain existing control processes as well as implemented new control processes to adapt to changes for the new ERP system. We believe that we have taken the necessary steps to monitor and maintain appropriate internal control over financial reporting. There were no changes in our internal control over financial reporting (as defined in Rules 13a-15(f) or 15d-15(f) under the Exchange Act) during the fourth quarter of fiscal 20142016 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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Report of Independent Registered Public Accounting FirmREPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
 


To the Board of Directors and Stockholders of
Fortinet, Inc.
Sunnyvale, California


We have audited the internal control over financial reporting of Fortinet, Inc. and subsidiaries (the “Company”) as of December 31, 2014,2016, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company'sCompany’s internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company’s internal control over financial reporting is a process designed by, or under the supervision of, the company’s principal executive and principal financial officers, or persons performing similar functions, and effected by the company'scompany’s board of directors, management, and other personnel 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'scompany’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) 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 (3) 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 the inherent limitations of internal control over financial reporting, including the possibility of collusion or improper management override of controls, material misstatements due to error or fraud may not be prevented or detected on a timely basis. Also, projections of any evaluation of the effectiveness of the internal control over financial reporting to future periods are subject to the risk that the controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2014,2016, based on the criteria established in Internal Control Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated financial statements and financial statement schedule as of and for the year ended December 31, 2014,2016 of the Company and our report dated February 27, 2015March 1, 2017 expressed an unqualified opinion on those consolidated financial statements and financial statement schedule.

/s/ DELOITTE & TOUCHE LLP

San Jose, California
February 27, 2015March 1, 2017








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ITEM 9B.     Other Information

None.

Part III

ITEM 10.     Directors, Executive Officers and Corporate Governance

Information responsive to this item is incorporated herein by reference to our definitive proxy statement with respect to our 20152017 Annual Meeting of Stockholders to be filed with the SEC within 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K.

As part of our system of corporate governance, our board of directors has adopted a code of business conduct and ethics. The code applies to all of our employees, officers (including our principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions), agents and representatives, including our independent directors and consultants, who are not our employees, with regard to their Fortinet-related activities. Our code of business conduct and ethics is available on our website at www.fortinet.com under “Corporate—Investor Relations—Corporate Governance.” We will post on this section of our website any amendment to our code of business conduct and ethics, as well as any waivers of our code of business conduct and ethics, that are required to be disclosed by the rules of the SEC or the NASDAQ Stock Market.

ITEM 11.     Executive Compensation

Information responsive to this item is incorporated herein by reference to our definitive proxy statement with respect to our 20152017 Annual Meeting of Stockholders to be filed with the SEC within 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K.

ITEM 12.    Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

Information responsive to this item is incorporated herein by reference to our definitive proxy statement with respect to our 20152017 Annual Meeting of Stockholders to be filed with the SEC within 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K.

ITEM 13.     Certain Relationships and Related Transactions, and Director Independence

Information responsive to this item is incorporated herein by reference to our definitive proxy statement with respect to our 20152017 Annual Meeting of Stockholders to be filed with the SEC within 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K.

ITEM 14.     Principal Accounting Fees and Services

Information responsive to this item is incorporated herein by reference to our definitive proxy statement with respect to our 20152017 Annual Meeting of Stockholders to be filed with the SEC within 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K.


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Part IV

ITEM 15.     Exhibits, Financial Statement Schedules

(a) The following documents are filed as part of this Annual Report on Form 10-K:

1.
Financial StatementsStatements:: The information concerning Fortinet’s financial statements and the Report of Independent Registered Public Accounting Firm required by this Item 15(a)(1) is incorporated by reference herein to the section of this Annual Report on Form 10-K in Part II, Item 8, titled “Financial Statements and Supplementary Data.”

2.
Financial Statement ScheduleSchedule: : The following financial statement schedule of Fortinet, Inc., for the fiscal years ended December 31, 2014, 20132016, 2015 and 2012,2014, is filed as part of this Annual Report on Form 10-K and should be read in conjunction with our consolidated financial statements.




SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS
Year Ended December 31,Year Ended December 31,
2014 2013 20122016 2015 2014
(in thousands)(in thousands)
Sales Returns Reserve:     
Sales Returns Reserve and Allowance for Doubtful Accounts:     
Beginning balance$4,573
 $2,267
 $2,351
$6,228
 $6,204
 $4,605
Charged (credited) to costs and expenses, net of deductions1,269
 2,306
 (84)
Charged to costs and expenses, net of deductions5,007
 24
 1,599
Ending balance$5,842
 $4,573
 $2,267
$11,235
 $6,228
 $6,204
     
Allowance for Doubtful Accounts:     
Beginning balance$32
 $115
 $336
Charged (credited) to costs and expenses, net of write-offs330
 (83) (221)
Ending balance$362
 $32
 $115
     

Schedules not listed above have been omitted because they are not applicable or are not required or the information required to be set forth therein is included in the consolidated financial statements or notes thereto.

3.
Exhibits: See Item 15(b) below. We have filed, or incorporated into this Annual Report on Form 10-K by reference, the exhibits listed on the accompanying Exhibit Index immediately following the signature page of this Annual Report on Form 10-K.

(b) Exhibits:

The exhibit list in the Exhibit Index immediately following the signature page of this Annual Report on Form 10-K is incorporated herein by reference as the list of exhibits required by this Item 15(b).

(c) Financial Statement Schedules: See Item 15(a) above.

93




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, on February 27, 2015March 1, 2017.
 
FORTINET, INC.
By:/s/    Ken Xie
Ken Xie, Chief Executive Officer and Chairman
(Duly Authorized Officer and Principal Executive Officer)

FORTINET, INC.
   
 By:/s/    Andrew Del Matto        
  Andrew Del Matto, Chief Financial Officer
  (Duly Authorized Officer and Principal Financial Officer)

FORTINET, INC.
By:/s/    Keith Jensen
Keith Jensen, Chief Accounting Officer
(Duly Authorized Officer and Principal Accounting Officer)


POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Ken Xie and Andrew Del Matto, jointly and severally, his or her attorney-in-fact, with the power of substitution, for him or her in any and all capacities, to sign any amendments to this Annual Report on Form 10-K and to file the same, with exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, hereby ratifying and confirming all that each of said attorneys-in-fact, or his substitute or substitutes, may do or cause to be done by virtue hereof.

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.
 

     
Signature  Title Date
     
/s/    Ken Xie          Chief Executive Officer and Chairman February 27, 2015March 1, 2017
Ken Xie  (Principal Executive Officer)  
     
/s/    Andrew Del Matto          Chief Financial Officer February 27, 2015March 1, 2017
Andrew Del Matto  (Principal Financial andOfficer)
/s/    Keith Jensen        Chief Accounting OfficerMarch 1, 2017
Keith Jensen(Principal Accounting Officer)  
     
/s/    Michael Xie          President, Chief Technology Officer and Director February 27, 2015March 1, 2017
Michael Xie     
     
/s/    Ming Hsieh          Director February 27, 2015March 1, 2017
Ming Hsieh     
     
/s/    Chenming HuGary Locke  Director February 27, 2015March 1, 2017
Chenming Hu
/s/    Hong Liang LuDirectorFebruary 27, 2015
Hong Liang LuGary Locke     
     
/s/    William H. Neukom  Director February 27, 2015March 1, 2017
William H. Neukom     
     
/s/   Christopher B. Paisley  Director February 27, 2015March 1, 2017
Christopher B. Paisley     
/s/ Judith SimDirectorMarch 1, 2017
Judith Sim��


94


EXHIBIT INDEX
Exhibit
Number
 Description Incorporated by reference herein     Description Incorporated by reference herein    
 Form Date 
Exhibit
Number
 Form Date 
Exhibit
Number
  
3.1 Amended and Restated Certificate of Incorporation Registration Statement on Form S-l (File No. 333-161190) August 10, 2009 3.2 Amended and Restated Certificate of Incorporation Registration Statement on Form S-l (File No. 333-161190) August 10, 2009 3.2
  
3.2 Bylaws Current Report on Form 8-K (File No. 001-34511) April 21, 2014 3.4 Bylaws Current Report on Form 8-K (File No. 001-34511) April 21, 2014 3.4
  
4.1 Specimen common stock certificate of the Company Registration Statement on Form S-l, as amended (File No. 333-161190) November 2, 2009 4.1 Specimen common stock certificate of the Company Registration Statement on Form S-l, as amended (File No. 333-161190) November 2, 2009 4.1
  
10.1
 Forms of Indemnification Agreement between the Company and its directors and officers Registration Statement on Form S-l (File No. 333-161190) August 10, 2009 10.1 Forms of Indemnification Agreement between the Company and its directors and officers Registration Statement on Form S-l (File No. 333-161190) August 10, 2009 10.1
  
10.2
 2000 Stock Plan and forms of agreement thereunder Registration Statement on Form S-l (File No. 333-161190) August 10, 2009 10.2 2000 Stock Plan and forms of agreement thereunder Registration Statement on Form S-l (File No. 333-161190) August 10, 2009 10.2
  
10.3
 2008 Stock Plan and forms of agreement thereunder Registration Statement on Form S-l (File No. 333-161190) August 10, 2009 10.3 2008 Stock Plan and forms of agreement thereunder Registration Statement on Form S-l (File No. 333-161190) August 10, 2009 10.3
  
10.4
 2009 Equity Incentive Plan and forms of restricted stock unit award and restricted stock agreement thereunder Registration Statement on Form S-l (File No. 333-161190) August 10, 2009 10.4 2009 Equity Incentive Plan and forms of restricted stock unit award and restricted stock agreement thereunder Registration Statement on Form S-l (File No. 333-161190) August 10, 2009 10.4
  
10.5
 Forms of stock option agreement under 2009 Equity Incentive Plan Annual Report on Form 10-K (File No. 001-34511) February 28, 2012 10.5 Forms of stock option agreement under 2009 Equity Incentive Plan Annual Report on Form 10-K (File No. 001-34511) February 28, 2012 10.5
  
10.6
 Form of performance stock unit award agreement under 2009 Equity Incentive Plan Quarterly Report on Form 10-Q (File No. 001-34511) August 6, 2013 99.1 Form of performance stock unit award agreement under 2009 Equity Incentive Plan Quarterly Report on Form 10-Q (File No. 001-34511) August 6, 2013 99.1
  
10.7*

 Forms of restricted stock unit award and performance stock unit award agreement under 2009 Equity Incentive Plan (Additional Forms) 
10.7

 Forms of restricted stock unit award and performance stock unit award agreement under 2009 Equity Incentive Plan (Additional Forms) 
Annual Report on Form 10-K (File No. 001-34511)

 
March 2, 2015

 
10.7

  
10.8
 Fortinet, Inc. 2011 Employee Stock Purchase Plan Current Report on Form 8-K (File No. 001-34511) June 27, 2011 10.1 Fortinet, Inc. 2011 Employee Stock Purchase Plan Current Report on Form 8-K (File No. 001-34511) June 27, 2011 10.1
  
10.9
 Fortinet, Inc. Bonus Plan Current Report on Form 8-K (File No. 001-34511) January 26, 2010 10.1 
Meru Networks, Inc. 2010 Equity Incentive Plan

 
Registration Statement on Form S-8 (File No. 333-205958)

 July 30, 2015 99.1
  
10.10
 Fortinet, Inc. Cash and Equity Incentive Plan Quarterly Report on Form 10-Q (File No. 001-34511) November 5, 2013 10.1 
Meru Networks, Inc. 2013 New Employee Stock Inducement Plan

 
Registration Statement on Form S-8 (File No. 333-205958)

 July 30, 2015 99.2
  
10.11
 Form of Change of Control Agreement between the Company and its directors Registration Statement on Form S-1, as amended (File No. 001-34511) August 10, 2009 10.11 
Forms of Fortinet, Inc. Restricted Stock Unit Assumption Agreement

 
Registration Statement on Form S-8 (File No. 333-205958)

 July 30, 2015 99.2
  
10.12
 Separation and Change of Control Agreement, dated as of August 7, 2009, between the Company and Ken Xie Registration Statement on Form S-l, as amended (File No. 333-161190) August 10, 2009 10.5 
Fortinet, Inc. Bonus Plan

 
Current Report on Form 8-K (File No. 001-34511)

 
January 26, 2010

 
10.1

  
10.13
 Separation and Change of Control Agreement, dated as of August 7, 2009, between the Company and Michael Xie Registration Statement on Form S-l, as amended (File No. 333-161190) August 10, 2009 10.6 Fortinet, Inc. Cash and Equity Incentive Plan Quarterly Report on Form 10-Q (File No. 001-34511) November 5, 2013 10.1
  
10.14
 Separation and Change of Control Agreement, dated as of August 7, 2009, between the Company and John Whittle Registration Statement on Form S-l, as amended (File No. 333-161190) August 10, 2009 10.8 Form of Change of Control Agreement between the Company and its directors 
Quarterly Report on Form 10-Q (File No. 001-34511)

 August 4, 2015 10.1
  
10.15
 Offer Letter, dated as of August 31, 2007, by and between the Company and John Whittle Registration Statement on Form S-l, as amended (File No. 333-161190) August 10, 2009 10.10 Amended and Restated Change of Control Agreement, dated as of February 4, 2016, between the Company and Ken Xie 
Annual Report on Form 10-K (File No. 001-34511)

 February 26, 2016 10.15
  
10.16
 Offer Letter, dated as of December 17, 2013, by and between the Company and Andrew Del Matto Current Report on Form 8-K (File No. 001-34511) December 20, 2013 99.1 Amended and Restated Change of Control Agreement, dated as of February 4, 2016, between the Company and Michael Xie 
Annual Report on Form 10-K (File No. 001-34511)

 February 26, 2016 10.16
  
10.17
 Letter regarding stock grants, dated as of December 17, 2013, between the Company and Andrew Del Matto Current Report on Form 8-K (File No. 001-34511) December 20, 2013 99.2 Amended and Restated Change of Control Agreement, dated as of February 4, 2016, between the Company and John Whittle 
Annual Report on Form 10-K (File No. 001-34511)

 February 26, 2016 10.17
  
10.18
 Change of Control Severance Agreement, dated as of December 17, 2013, between registrant and Andrew Del Matto Current Report on Form 8-K (File No. 001-34511) December 20, 2013 99.3 
Amended and Restated Change of Control Agreement, dated as of February 4, 2016, between the Company and Andrew Del Matto

 
Annual Report on Form 10-K (File No. 001-34511)

 February 26, 2016 10.18
  
10.19
 Amendment 1 to Change of Control Severance Agreement, dated as of July 31, 2014, between the Company and Ken Xie 
Quarterly Report on Form 10-Q (File No.001-34511)

 August 5, 2014 10.1
 

95


10.2010.19

 Amendment 1 to Change of Control Severance Agreement,
Offer Letter, dated as of JulyAugust 31, 2014,2007, by and between the Company and Michael XieJohn Whittle

 Quarterly
Registration Statement on Form S-l, as amended (File No. 333-161190)

August 10, 2009

10.10
10.20

Offer Letter, dated as of December 17, 2013, by and between the Company and Andrew Del Matto

Current Report on Form 10-Q8-K (File No.001-34511)No. 001-34511)

 August 5, 2014December 20, 2013 10.299.1
         
10.21

 Amendment 1 to Change of Control Severance Agreement,
Letter regarding stock grants, dated as of July 31, 2014,December 17, 2013, between the Company and John WhittleAndrew Del Matto

 Quarterly
Current Report on Form 10-Q8-K (File No.001-34511)No. 001-34511)

 August 5, 2014
December 20, 2013

 10.399.2
         
21.1* List of subsidiaries      
         
23.1* Consent of Independent Registered Public Accounting Firm      
         
24.1* Power of Attorney (incorporated by reference to the signature page of this Annual Report on Form 10-K)      
31.1* Certification of Chief Executive Officer pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
   
31.2* Certification of Chief Financial Officer pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
   
32.1* Certifications of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
   
101.SCH* XBRL Taxonomy Extension Schema Document
   
101.CAL* XBRL Taxonomy Extension Calculation Linkbase Document
   
101.PRE* XBRL Taxonomy Extension Presentation Linkbase Document
   
101.DEF* XBRL Taxonomy Extension Definition Linkbase Document
   
101.LAB* XBRL Taxonomy Extension Label Linkbase Document
   
101.INS* XBRL Instance Document


Indicates management compensatory plan, contract or arrangement.
* Filed herewith.


       


96104