Indicate by check mark if the Registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☐ No ☒

Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act. Yes ☐ No ☒

Indicate by check mark whether the Registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the Registrant has submitted electronically every Interactive Data File required to be submitted 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 such files). Yes ☒ No ☐

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the Registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262 (b)) by the registered public accounting firm that prepared or issued its audit report. ☐

The aggregate market value of the Common Stock held by non-affiliates of the Registrant, based on the closing price of the shares of common stock on the New York Stock Exchange on June 30, 2020, was $~~153,276,957~~.$153,276,957.

The number of shares of the Registrant’s Common Stock outstanding as of February 15, 2021 was ~~20,059,390~~.20,059,390.

Part III of this report incorporates information by reference to the Registrant’s proxy statement for its 2021 annual meeting of shareholders, which proxy statement will be filed with the Securities and Exchange Commission no later than 120 days after the close of the year ended December 31, 2020.

Certain matters discussed in this Annual Report on Form 10-K contain forward-looking statements that involve risks and uncertainties, such as statements related to future events, business strategy, future performance, future operations, financial position, estimated revenues and losses, projected costs, prospects, plans and objectives of management. All statements other than statements of historical fact may be forward-looking statements. Forward-looking statements are often, but not always, identified by the use of words such as “seek,” “anticipate,” “plan,” “continue,” “estimate,” “expect,” “may,” “will,” “project,” “predict,” “potential,” “targeting,” “intend,” “could,” “might,” “should,” “believe” and similar expressions or their negative. Forward-looking statements should not be read as a guarantee of future performance or results, and will not necessarily be accurate indications of the times at, or by, which such performance or results will be achieved. Forward-looking statements are based on management’s belief, based on currently available information, as to the outcome and timing of future events. These statements involve estimates, assumptions, known and unknown risks, uncertainties and other factors that may cause actual results or events to differ materially from those expressed in such forward-looking statements. Mayville Engineering Company, Inc. ~~(MEC, the Company, we, our, us or similar terms) believes the expectations reflected in the forward-looking statements contained in~~is filing this ~~Annual Report on Form 10-K are reasonable, but no assurance can be given that these expectations will prove~~Amendment No. 1 to ~~be correct. Forward-looking statements should not be unduly relied upon.~~

Important factors that could cause actual results or events to differ materially from those expressed in forward-looking statements include, but are not limited to, those described in “Risk Factors” in Part I, Item 1A of thisits Annual Report on Form 10-K for the fiscal year ended December 31, 2020, as ~~such may be amended or supplemented in Part II, Item 1A of our subsequently~~ filed ~~Quarterly Reports on Form 10-Q, and the following:~~

These factors are not necessarily all of the important factors that could cause actual results or events to differ materially from those expressed in forward-looking statements. Other unknown or unpredictable factors could also cause actual results or events to differ materially from those expressed in the forward-looking statements. All forward-looking statements attributable to us are qualified in their entirety by this cautionary statement. Forward-looking statements speak only as of the date hereof. We undertake no obligation to update or revise any forward-looking statements after the date on which any such statement is made, whether as a result of new information, future events or otherwise, except as required by federal securities laws.

MEC is a leading U.S.-based value-added manufacturing partner that provides a broad range of prototyping and tooling, production fabrication, coating, assembly and aftermarket components. Our customers operate in diverse end markets, including heavy- and medium-duty commercial vehicles, construction & access equipment, powersports, agriculture, military and other end markets. We have developed long-standing relationships with our blue-chip customers based upon a high level of experience, trust and confidence. “We Make Things Simple” by providing a diverse set of process offerings and a “one stop shop” for end-to-end solutions with benefits throughout the entire product lifecycle, including front-end collaboration in design and prototyping, product manufacturing, aftermarket components and ancillary supply chain benefits. Founded as a corporation in 1945 and headquartered in Mayville, Wisconsin, we are a leading Tier I U.S. supplier of highly engineered components to original equipment manufacturer (OEM) customers with leading position in their respective markets. We are focused on producing the highest quality components using complex processes at the lowest cost by working with customers throughout the product design and development process to establish optimal solutions. Our engineering expertise and technical know-how allow us to add value through every product redevelopment cycle (generally every three to five years for our customers). According to The Fabricator, we have been ranked as the largest fabricator in the United States for the past ten years in a row (2011 – 2020). We are more than two times the size of our next largest competitor, based on The Fabricator’s projections for revenue for metal fabricating companies.

Our customers’ complex products require a unique combination of our capabilities that allow us to achieve a customized offering to satisfy our customers’ desired outcomes. Our capabilities, which include, but are not limited to: metal fabrication, metal stamping, tube bending and forming, robotic part forming, robotic welding, resistance welding, five-axis tube and fiber laser cutting and custom coatings, including high heat and chemical agent resistant coating (CARC) painting, are used in a variety of applications and represent the building blocks of what we produce.

Our key customers have globally recognized brands and demand the highest product quality and expertise. Over our 75-year history, we have developed capabilities and provide solutions that result in customer loyalty and long-standing relationships, which we call “Experience You Can Trust”. We have a diverse and market-leading customer base that serves broad end markets representing favorable near- and long-term growth prospects for us. We have a track record of growth and are well-positioned to increase our market share and benefit from growth in customer demand as well as consolidate demand across the end markets that we serve. To help pursue our strategic mission, we have approximately 2,150 employees who are tactically aligned around our core values and will continue to participate in our employee ownership culture. We are led by an experienced management team that has contributed to our growth by establishing deep and long-standing relationships with key customers and has worked to expand the customer base both organically and through strategic acquisitions.

We maintain an established base of long-standing customers comprised of leading, blue-chip OEM manufactures across the United States. Our broad capabilities offering and track record of producing the highest quality solutions have allowed us to establish, and subsequently deepen, relationships with additional products and platforms over time. For example, our more than 40 year relationship with Deere & Company (John Deere) began with a small order of simple stamped parts for a farm tractor in its agricultural segment that expanded over time and represented 2020 sales in excess of $54.5 million across five market segments, representing over 60 model platforms. We have also been successful in winning customers and rapidly expanding relationships with high-growth customers by utilizing our diversified “one-stop” offering. For instance, our relationship with Volvo Truck began with fuel tanks and has expanded over the last eight years to include exhaust tubing, new sleeper cab and chassis fabrications and other fabrications. Through the expansion of multiple fabricated components from multiple facilities, we have been able to deepen our relationship with this customer and solidify our position as an important strategic sourcing partner.

We serve customers through 19 strategically located U.S. facilities that are in operation, across seven states, with almost 2.7 million square feet of manufacturing capacity. Our expansive footprint enables us to service and maintain strong relationships with existing key customers across the United States with a “local” presence, as well as target new customer opportunities. We have a proven track record of improving financial results by thoroughly understanding our capabilities and the markets we serve, and aligning our people and resources to optimize results. Coupled with our focus on market alignment and execution, we constantly strive to improve and refine capabilities, capacities and reduce our carbon footprint. In addition, the ongoing investment in flexible, re-deployable automation allows us to expand output while reducing cost and improving quality, productivity and consistency for margin enhancement and market leading competitiveness.

Our leading market position, embedded customer relationships with leading OEMs, unique value proposition and proven acquisition strategy has allowed us to achieve attractive financial performance and has positioned us for further growth. Our historical financial success is a function of our engineering expertise, extensive manufacturing capabilities, limited commodity exposure, investment in automation and embedded relationships with the ~~contractual ability to pass input costs through prices. We believe we are poised to grow though economic cycles due to our:~~

~~Our diversified profile today best positions us for stability and leading market performance through all phases of an economic cycle.~~

~~Our acquisition and integration activities have extended our manufacturing capabilities, product lines, geographical footprint, and end markets served.~~

Our most recent acquisition was completed on December 14, 2018 when we acquired Defiance Metal Products Co., Inc. (DMP), a full-service metal fabricator and contract manufacturer with two facilities in Defiance, OH, one in Heber Springs, AR, and one in Bedford, PA. We acquired DMP for $117.1 million, net of cash received. The DMP acquisition provided us with enhanced product, customer and geographic diversification with minimal customer overlap (i.e. less than $15.0 million).

We compete in the highly fragmented market of contract manufacturers, the majority of which are small local players that are limited in scale, capabilities and technology. Many of these local manufacturers have single or limited production capabilities and provide niche components in specific geographic markets. Accordingly, there are a limited number of competitors in the contract manufacturing market in which we operate with the capacity and expertise to deliver the full range of solutions we offer. For example, our diverse manufacturing capabilities across product lines have contributed to us being the recipient of The Fabricator’s “FAB 40” #1 Largest Fabricator in the attractive U.S. markets for the past ten years in a row (2011 – 2020). While we compete with certain manufacturers across selected product lines, we believe that no single manufacturer directly competes with us across our full offering and end market applications.

Our end market diversification coupled with our extensive product breadth allows us to maintain financial stability as individual end markets fluctuate. The primary end markets we serve include heavy- and medium-duty commercial vehicles, construction & access equipment, powersports, agriculture and military, among other machinery markets. As markets strengthen or weaken, our output is redirected and realigned to support ongoing change. Further, as these fluctuations affect the market, we are favorably positioned to benefit from the broader trend of our OEM customers to consolidate to fewer and more sophisticated suppliers in order to improve quality and delivery while lowering the total cost of doing business. This consolidation trend will allow us to grow and protects our cash flow as markets change and shift.

We have also experienced, and benefitted from, an OEM trend of seeking to improve their strategy execution and simplify their business through outsourcing. Based on our history, OEMs pursue a strategy that focuses on core component market differentiation, such as structural frames and complete powertrain assemblies, and prefer to outsource the remaining product components to third parties rather than manufacturing them in-house. This is done in order to maintain their strategic focus, drive cost savings and reduce their own investment in manufacturing, thereby allowing them to focus on the most important aspects of their value creation process, namely product design and development, final product assembly and testing, branding, sales, marketing and distribution. While each specific OEM differs in its strategy, we see this trend continuing as customers deal with workforce constraints and look for optimum return on investments and improving cash flow. Moreover, our OEM customers focus on the production of the core components of their products, which leads them to rely on outsourced providers like us for the remaining components of their finished product needs. We believe we will benefit from this continued shift in our customers’ focus and ongoing desire for OEMs to improve efficiencies, reduce costs and simplify supply chains. Our established and embedded relationships, breadth of capabilities and scalability will allow us to simplify the supply chain process for our customers by acting as a single point of contact in the supply chain. In addition, we believe OEMs are increasingly favoring platforms supported by larger, more sophisticated and financially stable suppliers with the ability to serve large national and international operations all while maintaining a local touch. Our extensive manufacturing footprint, competitive cost structure and integrated design, engineering, production planning and quality program management capabilities positions us favorably to take advantage of these opportunities and trends.

We believe that customers turn to us for their manufacturing needs because we are the ultimate “ReSource”. ReSource is a dual-purpose acronym we use to describe the breadth of our capabilities and our goal to be the one-stop solution allowing customers to re-source all of their fabrication needs through us. We collaborate with our customers to generate a strategic alignment and position ourselves as an essential part of our customers’ product development and manufacturing process by drawing on our deep product and engineering knowledge to deliver best-in-class solutions. We offer a broad portfolio of end-to-end solutions comprised of advanced and innovative processes and capabilities that enhance quality and simplify supply chains. We are focused on producing the highest

quality components using complex processes at the lowest cost by working with customers throughout the product design and development process to establish optimal solutions. Our engineering expertise and technical know-how allows us to add value through every product redevelopment cycle (generally every three to five years for our customers).

~~Value-Added Supply Chain Partner with Embedded Relationships.~~ Our embedded relationships with our large and diverse customer base are driven by the P.R.I.D.E. (“Personal Responsibility In Daily Excellence”) approach our employees take in their work, which emphasizes the highest quality and performance in all facets of our business, including our ability to partner with our customers and deliver to them complex solutions across a wide range of products. Our unique, end-to-end offering provides solutions throughout the life cycle of a product, including upfront product manufacturability advice and prototyping, production volumes and aftermarket components. We strive to maintain operation alignment (and continuous re-alignment) with our customers’ strategy and production activities as they evolve, allowing us to remain agile in response to market changes, while enabling our customers to be successful, and to remain adaptable to changes in customer needs to retain flexibility to adjust appropriately. Together, these items comprise “The MEC Mission.” Our focus on collaboration with our customers and our breadth of capabilities also generates strategic alignment with our customers, resulting in sticky relationships, driving vendor reduction and providing other ancillary benefits such as optimization of working capital investments. Our track record of engineering expertise has resulted in our consistent inclusion in customer design and prototyping activities, enabling customers to view us as an invaluable extension of their own teams. In turn, this collaboration allows our customers to focus on the development of their core technologies and products. Our position as a deeply embedded supply chain partner of scale allows us to provide a multitude of solutions, driving strong customer relationships with high switching costs.

~~Leading and Defendable Market Position in Attractive North American Market.~~ According to the Fabricator, we have been ranked as the largest fabricator in the United States for the past ten years in a row (2011 – 2020). The market is highly fragmented and characterized by high barriers to entry given the complex nature of the work, established relationships, and high customer switching costs. While there are numerous competitors in the markets in which we operate, few maintain the product breadth, manufacturing capabilities, scale or engineering expertise that we do. Our depth of capabilities allows us to offer our customers:

~~Our position in the market, along with our acquisition experience and reputation as the go-to consolidator, will result in continued organic and acquisitive growth in the future.~~

~~End Market and Customer Diversification.~~ Our value-added manufacturing focus enables us to remain diversified across a variety of customer end markets, including heavy- and medium-duty commercial vehicles, construction & access equipment, powersports, agriculture and military, among others. These end markets are representative of our globally recognized customers, which are comprised of large OEM manufacturers. In 2020, our top customer and top ten customers accounted for 15% and 79% of net sales respectively, which collectively represents hundreds of platforms that we serve across a variety of end markets and customer operating segments. Our access to a multitude of end markets allows us to strategically shift focus to sell into current opportunities as end market demand evolves. In addition to customer and end market diversification, our customers themselves are also diversified across multiple end markets. For example, John Deere is one of our leading customers with 2020 net sales accounting for 15% of our total net sales, to whom we provide over 5,000 SKUs across over 60 individual John Deere platforms including the agriculture, forestry, turf care, power systems and construction & access equipment end markets. Our increasingly stable performance is a direct result of our intentional business design of agility and adaptability to realign manufacturing capacities to serve diversified and ever-changing end markets.

~~Breadth of Capabilities Appealing to a Variety of Applications.~~ We have many manufacturing capabilities that together represent the building blocks for the complex solutions we provide to our customers. We maintain a full spectrum of capabilities across our 19 production facilities to address a wide set of customer needs, including upfront product development advice and prototyping, unique manufacturing processes and capabilities across a variety of products and back-end finishing, assembly and aftermarket components representing a unique end-to-end offering. Our range of capabilities combined with our breadth of components, including fabrications, tubes, tanks, and performance structures, expands the applicable uses and end markets in which we may offer our components. Throughout our history, our capabilities have allowed us to generate growth by expanding into new verticals and by further penetrating existing verticals through cross-selling to increase wallet share, a strategy that has driven sticky relationships with our customers. Further, our unique combination of manufacturing processes allows us to opportunistically target sophisticated, higher margin business. The diversity of our offering has provided our Company with financial stability through various end market and economic cycles.

~~Technology-Enabled Infrastructure.~~ We continue to invest in a technology-enabled asset base that provides significant flexible and re-deployable capacity to support our planned growth, increases profitability, efficiency, quality and employee safety, reduces spend on energy and drives a long-term cost advantage over our competitors. We have leveraged our purchasing power to make significant investments in operational infrastructure throughout our history, in items such as flexible and re-deployable automation and capacity improvements to improve throughput, quality and consistency. For example, we were one of the first in our industry to adopt fiber lasers and have continued to invest in this capability. We have implemented 10,000-watt fiber lasers with an automation tower, which are on average three times faster, provide a cleaner, more precise cut and use one-third of the power compared to traditional CO2 lasers, with a payback period of less than two years. Additionally, the implementation of robotic brakes has improved quality through a continued shift towards precision automation. By reducing setup procedures, manual employee lifting requirements and downtime while offering additional capacity, the implementation of robotic brakes has resulted in a payback period of approximately two years. These two examples of investments in technology-enabled infrastructure allow us to reallocate our workforce, as employees can be retrained and redeployed into more technically skilled positions. In today’s ever-changing labor market, the ability

to redeploy labor to increase flexibility and capacity for our customers is of utmost importance and interest as part of our strategy. Our investments in continuous improvement and automation have driven operational efficiencies and improved metric tracking allowing our management team to more effectively run the business and improve the value we provide to our customers. We have, from time-to-time, made strategic, customer-driven investments that directly support new product and market expansion which result in further competitive advantages and higher switching costs for our customers.

~~Cost Structure and Operational Excellence.~~ We have reduced our exposure to commodity price risk by structuring our customer contracts to pass through changes in commodity prices. As such, we have been able to effectively limit any potential impact from tariffs and commodity price volatility to our margins. Our scale and profitability have also allowed us the flexibility to implement continuous improvement initiatives in driving efficiencies, such as automation and additional capacity, which will result in long-term efficiency and margin improvements, and expanded capabilities.

~~Achieve Sales Growth Through Organic Expansion.~~ We believe there is ample opportunity to achieve deeper penetration of existing customers and to win new customers with our strong one-stop offerings. By leveraging our core product capabilities to expand into new markets, and establishing new offerings in attractive, adjacent or complementary platforms through new product introductions, there is significant opportunity to execute on our organic growth initiatives. Expanding our wallet share with our customers by capturing a wider variety of products and more platforms both solidifies our relationship with customers (because it increases customer switching costs) and attracts potential new customers that seek to simplify supply chains, while also defending our market position from our competitors. These opportunities are enhanced through cross selling between MEC’s capabilities and customer base. Our expertise allows us to produce higher quality components at cost-effective rates while our volume, equipment and know-how establish competitive advantages. Further, an expanded offering increases our strategic alignment with customers and supports our “We Make Things Simple” value proposition by presenting customers with further vendor consolidation opportunities.

~~Pursue Opportunistic Acquisitions.~~ Our management team maintains a proven track record of successfully executing and integrating strategic acquisitions. We have completed two significant acquisitions since 2012 (Center Mfg. Co. in 2012 and DMP in December 2018) and four other complementary acquisitions since 2004, which have contributed new capabilities, product offerings, end markets served, and technologies to our legacy business, along with significant synergy opportunities that have enhanced our financial position. Our strategy is to continue to identify, and opportunistically execute on, accretive acquisitions that will allow our Company to achieve further growth. We believe that our reputation, scale and track record of performance makes us a “consolidator of choice” among industry participants, which has led to an ample pipeline of actionable acquisition opportunities. Our investment criteria for acquisitions are U.S.-based companies with long-standing customer bases comprised of leading OEMs, and specialized manufacturing capabilities that allows us to enhance our existing expertise or expand into new types of capabilities, among other criteria. It is our view that continued execution of our acquisition strategy provides significant opportunity to generate shareholder value through further consolidation of our fragmented industry. The market environment, comprised mainly of small local and regional players, provides ample add-on acquisition opportunities to bolster our one-stop shop approach to broadly serving our customers. Beyond our existing served markets, we see potential acquisition opportunities within the rail, aerospace, medical, fitness, energy, heavy fabrication and food & beverage end markets, among others.

~~Continue Process-Driven Improvement Initiatives.~~ Our process-driven improvement initiatives have resulted in significant savings throughout our history, leading to improved financial results and positive customer outcomes. Our strategy will continue to include a keen focus on continuous improvements in order to maintain a differentiated and defendable market-leading position, as well as ongoing costs and operating improvements including investments in technology and automation, plant consolidations, and acquisition integration synergies, which are expected to drive immediate and long-term productivity and margin improvements through permanent headcount reductions. Examples of recent process driven improvement plans include:

~~Maintain Alignment with Employee Base and Employee-Driven Results.~~ Our rich history of employee ownership and P.R.I.D.E has cultivated a strategic management-employee alignment and results-driven organization with each employee contributing to a common goal. Our employees maintain a significant ownership stake since our IPO, which we believe benefits the entire organization as our strategic alignment remains in place and continues to generate employee-driven results. As we continue to invest in our business and increasingly implement a more technology-enabled infrastructure, we will strive to redeploy our employees in other, higher-skilled areas of our business and invest in training where needed. Our employees are the foundation of our company; with experience across a diverse range of markets and capabilities, they drive innovation, believe in our process and the outcomes of their work and our success. Our investment in new technology attracts technically savvy employees to replace retiring traditionally skilled employees. We and our employees are also highly involved in, and actively support, the communities in which our facilities are located; our 2,150 employees take P.R.I.D.E. in creating value and support for both our customers and communities every day.

We offer a broad portfolio of end-to-end processes and solutions comprised of advanced and innovative capabilities that enhance quality and simplify supply chains for our customers. Through our collaborative approach, we maintain a complete, and growing, set of sophisticated manufacturing capabilities to meet the diverse needs of our customers, including:

We collaborate with our customers to generate a strategic alignment and position ourselves as an essential part of our customers’ product development and manufacturing process by drawing on our deep product and engineering knowledge to deliver best-in-class solutions. Our approach is simple: we view quality as a significant business strategy with a strong return on investment. Our philosophy on quality is based on Continuous Improvement with an IATF (international automotive task force) and ISO (international organization for standardization) foundation. Our skilled and experienced staff is highly trained in areas of quality planning, metrology, geometric dimensioning and tolerancing (ASME Y14.5M 1994), ISO, QS9000, statistical techniques (SPC) and ISO 14001 certifications. Our Quality Management System is comprised of the following:

We periodically enter into joint process improvement efforts with key customers. Such exercises have historically resulted in reduced manufacturing critical path time, cost reductions and quality improvements through effective batch sizes and more repeatable processes. Our continuous improvement initiatives have resulted in the acquisition and application of state-of-the-art technologies and plant improvements that support lean, quick response manufacturing flexibility that put us at the forefront of our market. Moreover, the agility that our quick response manufacturing methodology provides us keeps our purchasing, manufacturing, engineering and quality teams on the cutting edge of flexible manufacturing. This adaptable approach also decreases manufacturing costs, allows for faster order turnaround times, and elimination of excess waste.

We maintain an advanced machinery portfolio in our facilities that allow us to leverage our employee workforce with state-of-the-art capabilities and functionality. We strive to maintain our assets or upgrade capabilities where deterioration has driven obsolescence or better technology is available, reducing our carbon footprint. Most recently, we have invested in two fiber laser systems with automation aimed at reducing labor content and optimizing floor space which allows us to generate more revenue with the same workforce and footprint. We have also recently invested in a machining center with palletizers, robotic brake presses, robotic weld cells and a direct-to-metal paint line.

Our primary end markets include (but are not limited to) the heavy- and medium-duty commercial vehicles, construction & access equipment, powersports, agriculture and military markets. While our individual end markets may be exposed to cyclical variations, the diversified nature of our end markets affords us the ability to shift production with demand as certain end markets trend lower and others trend higher. In our experience, our diversification has muted the impact of downturns on our business that we have faced in the past. For example, we experienced net sales growth during the 2008 and 2009 recessions due to strong orders, particularly from our customers focused on the military end market. Moreover, as our heavy- and medium-duty commercial vehicles, construction & access equipment, powersports, and agriculture customers’ revenues fluctuated from 2013 to 2017, with median peak-to-trough sales decline of 23%, our peak-to-trough sales declines were less than that of those respective markets at only 10%. We were able to accomplish this by reallocating our resources to serve our heavy- and medium-duty commercial vehicles and powersports customers, leading to strong double-digit growth in those end markets.

We are a critical and deeply embedded supply partner with strong strategic alignment and relationships with our customers. We have developed long-standing business relationships with our OEM customers, many of which span decades. Further, we are diversified by customers and end markets with net sales attributed to our top 20 customers accounting for $320 million of 2020 net sales, and no single end market accounting for more than 33% of net sales. For the year ended December 31, 2020, John Deere, Honda, PACCAR Inc. and AB Volvo accounted for 15%, 13%, 12% and 11% of net sales, respectively. We have not historically experienced customer attrition given high customer switching costs resulting from our embedded relationships driven by our broad capabilities and scale.

Our purchases primarily include steel and aluminum. We maintain a broad and diverse base of over 1,000 suppliers. Our established relationships provide efficient and flexible access to resources and redundancy to ensure support of our customers. We have no history of material supply issues or outages. In 2020, no single supplier represented more than 16% of our total purchases and 96% of the raw materials we purchased were sourced from domestic suppliers. Our suppliers are strategically located in order to maximize efficiencies and minimize shipping costs, although switching costs are minimal and we maintain a multitude of alternative suppliers that we could transfer orders to, if needed. We have structured our customer contracts to pass through commodity price changes, which has allowed us to remain mostly unaffected by the recent raw material price volatility and tariffs. As we continue to grow, we intend to leverage our size and scale to further reduce material costs.

We have a strong sales team comprised of approximately 50 experienced professionals responsible for managing and expanding client relationships, and proactively pursuing new opportunities. Sales personnel are aligned by market segment and customer, including heavy- and medium-duty commercial vehicles, construction & access equipment, powersports, agriculture, military and other end markets, and employ a highly technical and collaborative sales process with deep knowledge of our customers and capabilities. Sales personnel have assigned support teams comprised of inside sales, marketing, and sales administration personnel. We are consistently involved in request for proposal processes, where our sales teams with deep process expertise collaborate with customers on optimal designs for manufacturability and manufacturing efficiency. The upfront collaboration drives formalization of product specifications, program lifecycle planning, cost estimates and risk mitigation. The sales process typically takes 3 – 18 months and ultimately ends in the implementation of product lifecycle timelines and purchase orders under long-term customer arrangements. The sales team utilizes systems infrastructure that effectively track and manage backlogs, quotes and bookings information, strategic projects and call reports, all of which are reviewed at weekly sales team meetings.

We utilize standardized information technology systems across all areas of quoting and estimating, enterprise resource planning, materials resource planning, capacity planning and accounting for enhanced procurement of work, project execution and financial controls. We provide information technology oversight and support from our corporate headquarters in Mayville, WI. The operational information systems we employ throughout our company are industry specific applications that in some cases have been internally or vendor modified and improved to fit our operations. Our enterprise resource planning software is integrated with our operational information systems wherever possible to deliver relevant, real-time operational data to designated personnel. Accounting and operations personnel of acquired companies are trained not only by our information technology support staff, but by long- tenured employees in our organization with extensive experience using our systems. We believe our information systems provide our people with the tools to execute their individual job function and achieve our strategic initiatives.

We participate in a highly fragmented market with competitors in each of the end markets we serve ranging in size from small companies focused on a single capability or end market, to large multi-disciplinary companies. While there can be instances of intense competition from specific end markets, we believe that we have been able to effectively compete, and maintain competitive advantages on the basis of our:

~~As of December 31, 2020, we had approximately 2,150 full-time employees, approximately 1,725 of whom are production employees, none of which are unionized.~~

We maintain an experienced and skilled workforce. We have been highly focused on attracting and retaining high quality personnel as they represent a critical factor in our continued success. Despite the recent market challenges in the hiring of trade-skilled employees, our continued investment in newer technologies and capabilities has allowed us to opportunistically re-train and redeploy certain roles that were previously human capital-intensive, and re-train and repurpose employees into other areas of the company. On average, our employees have approximately seven years of service with us. We believe we maintain strong relations with our employees and believe they are aligned with our employee-owned mindset.

We are subject to numerous federal, state and local laws and regulations relating to manufacturing, handling and disposal of materials into the environment. We believe that our environmental control procedures are adequate.

~~The following table sets forth certain information as of February 1, 2021, regarding our executive officers:~~

~~Robert D. Kamphuis~~ joined our company as President and Chief Executive Officer in 2005 and has served as the Chairman, President and Chief Executive Officer since January 2007. Mr. Kamphuis also serves as a board member and past Chairman of Wisconsin Manufacturers & Commerce, a board member of Brakebush Brothers, Inc. and The Nordic Group of Companies, Ltd., and Subzero Group Inc., and a member of the UW System Business Council, the John Deere Direct Material Supplier Council, and a past member of the Harley Davidson Supplier Advisory Council. Prior to joining our company, Mr. Kamphuis held various roles with Giddings & Lewis, Inc. including as President and Chief Executive Officer of Gilman Engineering and Manufacturing Co., LLC, a designer and manufacturer of automated assembly systems, and began his career with Ernst & Young. Mr. Kamphuis is a graduate of the Executive International Leadership Program at Stanford University and earned a Bachelor of Business Administration & Accounting from the University of Wisconsin-Whitewater. He is also a licensed certified public accountant.

~~Todd M. Butz~~ joined our company in 2008 and has served as our Chief Financial Officer since January 2014. Mr. Butz also serves on the Board of Trustees for Marian University. Prior to joining our company, Mr. Butz spent time in various roles including Manager of Worldwide Financial Reporting at Mercury Marine, a subsidiary of the Brunswick Corporation, and Audit Supervisor at Schenck Business Solutions, now Clifton Larsen Allen. Mr. Butz earned a Bachelor of Science in Accounting and Business Management from Marian University and is currently a licensed certified public accountant.

~~Ryan F. Raber~~ joined our company in 2009 and has served as our Executive Vice President – Strategy, Sales & Marketing since June 2019. Prior to serving in his current position, Mr. Raber served as our Executive Vice President – Sales & Marketing beginning in November 2018 and as our Vice President of Sales & Marketing beginning in August 2013. Mr. Raber earned a Masters of Business Administration from the University of Wisconsin-Madison and a Bachelor of Science in Mechanical Engineering from Purdue University.

~~Rand P. Stille~~ joined our company in April 2019 and has served as our Chief Operating Officer since March 2020. Prior to serving in his current position, Mr. Stille served as our Executive Vice President – DMP & Performance Structures Operations and Vice President – Performance Structures Operations. Prior to joining our company, Mr. Stille held various roles with Universal Logistics Holding including Senior Vice President of Operations, Vice President & Executive Director of Westport Axle and Vice President of Mexican Operations. Mr. Stille earned a Master of Science in Supply Chain Management from the University of Michigan State and a Bachelor of Arts, Economics and Management degree from the University of Depauw.

~~Eric J. Welak~~ joined our company in 1996 and has served as our Executive Vice President – Fabrication since January 2017. Prior to serving in his current position, Mr. Welak served as our Operations Manager, Plant Manager, Director of Operations and Vice President of Operations. Mr. Welak earned an Associate of Industrial Engineering from Moraine Park Technical College and a Bachelor of Science in Business Administration, Management and Operations from Marian University.

Our website address is www.mecinc.com. We are not including the information provided on our website as a part of, or incorporating it by reference into, this Annual Report on Form 10-K. We make available free of charge (other than an investor’s own internet access charges) through our website our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, amendments to these reports and our proxy statements, as soon as reasonably practicable after we electronically file such material with, or furnish such material to, the United States Securities and Exchange Commission ~~(the SEC).~~

~~Investing in our common stock involves a high degree of risk. You should carefully consider~~on March 5, 2021, solely to revise the ~~risks~~certifications filed as Exhibits 31.1 and ~~uncertainties described below, together with all of~~31.2 to the ~~other information in this Annual Report on~~original Form 10-K, including “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and our consolidated financial statements and related notes, before making a decision to invest in our common stock. The risks and uncertainties described below may not be the only ones we face. If any of the risks actually occur, our business, financial condition, operating results and prospects could be materially and adversely affected. In that event, the market price of our common stock could decline, and you could lose part or all of your investment.

~~The coronavirus (COVID-19) pandemic has had, and will continue to have, a negative impact on our business, financial condition, cash flows, results of operations and supply chain.~~

The COVID-19 pandemic has resulted in national, state and local government authorities implementing numerous measures to try to contain the virus, such as travel bans and restrictions, border closings, restrictions on public gatherings, quarantining of people who may have been exposed to the virus, shelter-in-place restrictions, and limitations or shutdowns of business operations. These measures have impacted and may further impact our workforce and operations, including disruptions at some of our manufacturing operations and facilities, as well as the operations of our customers, and those of our suppliers. There is still uncertaintywhich inadvertently omitted certain language regarding the full impact and duration of such measures and potential future measures, and restrictions on our access to our facilities or on our support operations or workforce, or similar limitations for our suppliers.

The COVID-19 pandemic has significantly increased economic and demand uncertainty and has caused an economic slowdown that may continue. The pandemic has also weakened demand for our components, products and services, which has resulted in a decline in sales activities and customer orders, and it remains uncertain what impact this weakened demand will have on future sales activities and customer orders once conditions further improve. The pandemic could also continue to disrupt our supply chain.

The COVID-19 pandemic has led to disruption and volatility in the global capital markets, which may adversely affect our customers’ and suppliers’ liquidity, cost of capital and ability to access the capital markets. As a result, the pandemic could adversely affect our liquidity as well as the ability of our customers to perform, including in making timely payments to us, which could further adversely impact our business, financial condition, cash flows and results of operations.

The COVID-19 pandemic has had, and will continue to have, a negative impact on our business, financial condition, cash flows, results of operations, supply chain, and raw material availability, although the full extent is still uncertain. As the pandemic continues to evolve, the extent of the impact on our business, financial condition, cash flows, results of operations and supply chain will depend on future developments, including, but not limited to, the duration of the pandemic (including any continuing relapses), the actions to contain the virus and/or treat its impact, restrictions on travel, the duration, timing and severity of the impact on customer spending, and how quickly and to what extent normal economic and operating conditions can resume, all of which are highly uncertain and cannot be predicted.

~~Failure to compete successfully in our markets could materially adversely affect our business, financial condition, results of operations or prospects.~~

~~We offer our processes and solutions in highly competitive markets. The competitors in these markets may, among other things:~~

Competitors with lower cost structures may have a competitive advantage over us. We also expect our competitors to continue to improve the performance of their current processes and solutions, to reduce the prices of their existing processes and solutions and to introduce new processes or solutions that may offer greater performance and improved pricing. Additionally, we may face competition from new entrants to the industry in which we operate. Any of these developments could cause a decline in sales and average selling prices, loss of market share or profit margin compression. Maintaining and improving our competitive position will require successful management of these factors, including continued investment by us in research and development, engineering, marketing and customer service and support. Our future growth rate depends upon our agility to compete successfully, which is impacted by a number of factors, including, but not limited to, our ability to (i) identify emerging technological trends in our target end markets, (ii) develop and maintain a wide range of competitive and appropriately priced processes and solutions and defend our market share against an ever-expanding number of competitors including many new and non-traditional competitors, (iii) ensure that our processes and solutions remain cost-competitive and (iv) attract, develop and retain individuals with the requisite technical expertise and understand of customers’ needs to develop and sell new technologies and processes.

~~We are affected by developments in the industries in which our customers operate.~~

We derive a large amount of our net sales from customers in the following industry sectors: heavy- and medium-duty commercial vehicles, construction & access equipment, powersports, agriculture and military. Factors affecting any of these industries in general, or any of our customers in particular, could adversely affect us because our net sales growth largely depends on the continued growth of our customers’ businesses in their respective industries. These factors include:

We expect that future sales will continue to depend on the success of our customers. If economic conditions and demand for our customers’ products deteriorate, we may experience a material adverse effect on our business, operating results and financial condition.

~~Most of our customers do not commit to long-term production schedules, which makes it difficult for us to schedule production accurately and achieve maximum efficiency of our manufacturing capacity.~~

Most of our customers do not commit to long-term contracts or firm production schedules, and we continue to experience reduced lead-times in customer orders. Additionally, customers may change production quantities or delay production with little lead-time or advance notice. Therefore, we rely on and plan our production and inventory levels based on our customers’ advance orders, commitments and/or forecasts as well as our internal assessments and forecasts of customer demand. The volume and timing of sales to our customers may vary due to, among others:

The variations in volume and timing of sales make it difficult to schedule production and optimize utilization of manufacturing capacity. This uncertainty may require us to increase staffing and incur other expenses in order to meet an unexpected increase in customer demand, potentially placing a significant burden on our resources. Additionally, an inability to respond to such increases in a timely manner may cause customer dissatisfaction, which may negatively affect our customer relationships.

Further, in order to secure sufficient production scale, we may make capital investments in advance of anticipated customer demand. Such investments may lead to low utilization levels if customer demand forecasts change and we are unable to utilize the additional capacity. Because fixed costs make up a large proportion of our total production costs, a reduction in customer demand can have a significant adverse impact on our gross profits and operating results. Additionally, we order materials and components based on customer forecasts and orders and suppliers may require us to purchase materials and components in minimum quantities that exceed customer requirements, which may have an adverse impact on our gross profits and operating results. In the past, anticipated orders from some of our customers have failed to materialize and delivery schedules have been deferred as a result of changes in our customers’ business needs.

~~We may not be able to maintain our manufacturing, engineering and technological expertise.~~

~~The markets for our processes and solutions are characterized by changing technology and evolving process development. The continued success of our business will depend upon our ability to:~~

We cannot be certain that we will develop the capabilities required by our customers in the future. The emergence of new technologies, industry standards or customer requirements may render our equipment, inventory or processes obsolete or uncompetitive. We may have to acquire new technologies and equipment to remain competitive. The acquisition and implementation of new technologies and equipment may require us to incur significant expense and capital investment, which could reduce our margins and affect our operating results. When we establish or acquire new facilities, we may not be able to maintain or develop our manufacturing, engineering and technological expertise due to a lack of trained personnel, effective training of new staff or technical difficulties with machinery. Failure to anticipate and adapt to customers’ changing technological needs and requirements or to hire and retain a sufficient number of engineers and maintain manufacturing, engineering and technological expertise may have a material adverse effect on our business, operating results and financial condition.

We are dependent on a limited number of large customers for current and future net sales. The loss of any of these customers or the loss of market share by these customers could materially adversely affect our business, financial condition, results of operations and cash flows.

We depend on a limited number of major manufacturers for a majority of our net sales. For example, our largest customers in 2020, including John Deere, Honda, PACCAR Inc. and AB Volvo accounted for 15%, 13%, 12% and 11% of our net sales, respectively. Our financial performance depends in large part on our ability to continue to arrange for the purchase of our processes and solutions with these customers, and we expect these customers to continue to make up a large portion of our net sales in the foreseeable future. The loss of all or a substantial portion of our sales to any of our large-volume customers could have a material adverse effect on our business, financial condition, results of operations and cash flows by reducing cash flows and by limiting our ability to spread our fixed costs over a larger net sales base. We may make fewer sales to these customers for a variety of reasons, including, but not limited to:

~~We may be unable to realize net sales represented by our awarded business, which could materially and adversely impact our business, financial condition, results of operations and cash flows.~~

The realization of future net sales from awarded business is inherently subject to a number of important risks and uncertainties, including a lack of long-term commitments and production schedules with customers. Accordingly, we cannot assure you that we will realize any or all of the future net sales represented by our awarded business. Any failure to realize these net sales could have a material adverse effect on our business, financial condition, results of operations and cash flows.

In addition to not having a commitment from our customers regarding the minimum number of components they must purchase from us if we obtain awarded business, typically the terms and conditions of the agreements with our customers provide that they have the contractual right to unilaterally terminate our contracts with them with no notice or limited notice. In many cases, we must commit substantial resources in preparation for production under awarded customer business well in advance of the customer’s production start date. If such contracts are terminated by our customers, our ability to obtain compensation from our customers for such termination is generally limited to the direct out-of-pocket costs that we incurred for raw materials and work-in-progress. Although we have been successful in recovering these costs under appropriate circumstances in the past, we cannot assure you that our results of operations will not be materially adversely impacted in the future if we are unable to recover these types of pre-production costs related to our customers’ cancellation of awarded business.

~~Our growth strategy includes acquisitions, and we may not be able to identify attractive acquisition targets or successfully integrate acquired targets without impacting our business.~~

Acquisitions have played a key role in our growth strategy, and we expect to continue to grow through acquisitions in the future. We expect to continue evaluating potential strategic acquisitions of businesses, assets and product lines. We may not be able to identify suitable candidates, negotiate appropriate or favorable acquisition terms, obtain financing that may be needed to consummate such transactions or complete proposed acquisitions. There is significant competition for acquisition and expansion opportunities in our businesses, which may increase the cost of any acquisition or result in the loss of attractive acquisition targets.

In addition, acquisitions involve numerous risks, including (i) incurring the time and expense associated with identifying and evaluating potential acquisitions and negotiating potential transactions, resulting in management’s attention being diverted from the operation of our existing business; (ii) using estimates and judgments to evaluate credit, operations, funding, liquidity, business, management and market risks with respect to the target entity or assets; (iii) litigation relating to an acquisition, particularly in the context of a publicly held acquisition target, could require us to incur significant expenses or result in the delaying or enjoining of the transaction; (iv) failing to properly identify an acquisition candidate’s liabilities, potential liabilities or risks; and (v) not receiving required regulatory approvals or such approvals being delayed or restrictively conditional. In addition, any acquisitions could involve the incurrence of substantial additional indebtedness or dilution to our shareholders. We cannot assure you that we will be able to successfully integrate any acquisitions that we undertake or that such acquisitions will perform as planned or prove to be beneficial to our operations and cash flow. Any such failure could seriously harm our financial condition, results of operations and cash flows.

We routinely evaluate potential acquisition candidates and engage in discussions and negotiations regarding potential acquisitions; however, even if we execute a definitive agreement for an acquisition, there can be no assurance that we will consummate the transaction within the anticipated closing timeframe, or at all. Further, acquisitions typically involve the payment of a premium over book- and market-value for the target business or asset and, therefore, some dilution of our tangible book value and/or earnings per common share may occur in connection with any future transaction.

~~Entering new markets, either organically or via acquisition, poses new competitive threats and commercial risks.~~

As we expand into new markets, either organically or via acquisition, we expect to diversify our net sales by leveraging our development, engineering and manufacturing capabilities in order to source necessary parts and components for other industries. Such diversification requires investments and resources that may not be available as needed. Furthermore, even if we sign contracts in new markets, we cannot guarantee that we will be successful in leveraging our capabilities into these new markets and thus in meeting the needs of these customers and competing favorably in these new markets. If these customers experience reduced demand for their products or financial difficulties, our future prospects will be negatively affected as well.

~~If we fail to develop new and innovative processes or if customers in our market do not accept them, our results would be negatively affected.~~

Our processes must be kept current to meet our customers’ needs. To remain competitive, we therefore must develop new and innovative processes on an ongoing basis. If we fail to make innovations or the market does not accept our new processes, our sales and results would suffer. We invest significantly in the research and development of new processes; however, these expenditures do not always result in processes that will be accepted by the market. To the extent they do not, whether as a function of the process or

the business cycle, we will have increased expenses without significant sales to offset such costs. Failure to develop successful new processes may also cause potential customers to purchase from competitors.

We depend on our key executive officers, managers, and trade-skilled personnel and may have difficulty retaining and recruiting qualified employees. Moreover, we operate in competitive labor markets, which may also impact our ability to hire and retain employees at our facilities.

Our success depends to a large extent upon the continued services of our executive officers, senior management, managers and trade-skilled personnel and our ability to recruit and retain skilled personnel to maintain and expand our operations. We could be affected by the loss of any of our executive officers who are responsible for formulating and implementing our business plan and strategy, and who have been instrumental in our growth and development. In addition, in order to manage our growth, we will need to recruit and retain additional management personnel and other skilled employees at our facilities. However, competition for our trade-skilled labor is high, particularly in some of the geographic locations where our facilities are located. Although we intend to continue to devote significant resources to recruit, train and retain qualified employees, we may not be able to attract, effectively train and retain these employees. Any failure to do so could impair our ability to conduct design, engineering and manufacturing activities, efficiently perform our contractual obligations, develop marketable components, timely meet our customers’ needs and ultimately win new business, all of which could adversely affect our business, financial condition and results of operations. If we are not able to do so, our business and our ability to continue to grow could be negatively affected. In addition, salaries and related costs are a significant portion of the cost of providing our solutions and, accordingly, our ability to efficiently utilize our workforce impacts our profitability. If our employees are under-utilized, our profitability could suffer.

~~We are dependent on information technology and our systems and infrastructure face certain risks, including cyber security risks and data leakage risks.~~

We are dependent on information technology systems and infrastructure that could be damaged or interrupted by a variety of factors. Any significant breach, breakdown, destruction or interruption of these systems by employees, others with authorized access to our systems or unauthorized persons has the potential to negatively affect our operations. There is also a risk that we could experience a business interruption, theft of information or reputational damage as a result of a cyberattack, such as the infiltration of a data center, or data leakage of confidential information either internally or at our third-party providers. Although we have invested in the protection of our data and information technology to reduce these risks and periodically test the security of our information systems network, there can be no assurance that our efforts will prevent breakdowns or breaches in our systems that could have a material adverse effect on our financial condition, results of operations and liquidity.

~~We may incur additional expenses and delays due to technical problems or other interruptions at our manufacturing facilities.~~

Disruptions in operations due to technical problems or power interruptions as well as other interruptions such as floods, fire, other natural disasters, epidemics or pandemics like COVID-19 could adversely affect the manufacturing capacity of our facilities. Such interruptions could cause delays in production and cause us to incur additional expenses such as charges for expedited deliveries for components that are delayed. In addition, our customers have the ability to cancel purchase orders in the event of any delays in production and may decrease future orders if delays are persistent. Additionally, to the extent that such disruptions do not result from damage to our physical property, these may not be covered by our business interruption insurance. Any such disruptions may adversely affect our operations and financial results.

Increased political instability and social unrest, evidenced by the threat or occurrence of terrorist attacks, enhanced national security measures, the risks related to epidemics or pandemics like COVID-19 and the related decline in consumer confidence may hinder our ability to do business. Any escalation in these events or similar future events may disrupt our operations or those of our customers and suppliers and could affect the availability of raw materials and components we need in our manufacturing operations or the means to transport those materials or components to our manufacturing facilities and finished parts to our customers. These events have had and may continue to have an adverse effect, generally, on the economy and consumer confidence and spending, which could adversely affect our net sales and operating results. The effect of these events on the volatility of the financial markets could in the future lead to volatility of the market price of our securities and may limit the capital resources available to us, our customers and our suppliers.

~~Availability of, and volatility in the prices of, raw materials and energy prices and our ability to pass along increased costs to our customers could adversely affect our results of operations.~~

The prices and availability of raw materials critical to our business and performance are based on global supply and demand conditions. Certain raw materials used by us are only available from a limited number of suppliers, and it may be difficult to find

alternative suppliers at the same or similar costs. While we strive to pass through the price of raw materials to our customers, we may not be able to do so in the future, and volatility in the prices of raw materials may affect customer demand for certain components. In addition, we, along with our suppliers and customers, rely on various energy sources for a number of activities connected with our business, such as the transportation of raw materials and finished parts. The availability and pricing of these resources are subject to market forces that are beyond our control. Furthermore, we are vulnerable to any reliability issues experienced by our suppliers, which also are beyond our control. Our suppliers contract separately for the purchase of such resources, and our sources of supply could be interrupted should our suppliers not be able to obtain these materials due to higher demand or other factors that interrupt their availability (such as the impacts of the COVID-19 pandemic). Energy and utility prices, including electricity and water prices, and in particular prices for petroleum-based energy sources, are volatile. Increased supplier and customer operating costs arising from volatility in the prices of energy sources, such as increased energy and utility costs and transportation costs, could be passed through to us and we may not be able to increase our product prices sufficiently or at all to offset such increased costs. The impact of any volatility in the prices of energy or the raw materials on which we rely, including the reduction in demand for certain components caused by such price volatility, could result in a loss of net sales and profitability and adversely affect our results of operations.

~~Our manufacturing operations are dependent upon third-party suppliers, making us vulnerable to supply shortages.~~

We obtain raw materials, parts and certain components from third-party suppliers. Any delay in receiving supplies (including as a result of the COVID-19 pandemic) could impair our ability to timely deliver components to our customers and, accordingly, could have an adverse effect on our business, financial condition, results of operations and cash flows. The volatility in the financial markets and uncertainty in the sectors our suppliers service (including as a result of the COVID-19 pandemic) could result in exposure related to the financial viability of certain of our suppliers. Suppliers may also exit certain business lines, causing us to find other suppliers for materials or components and potentially delaying our ability to deliver components to customers, or our suppliers may change the terms on which they are willing to provide parts or materials to us, any of which could adversely affect our financial condition and results of operations. In addition, many of our suppliers have unionized workforces that could be subject to work stoppages as a result of labor relations issues. Some of our suppliers supply components and materials that cannot be quickly or inexpensively re-sourced to another supplier due to long lead times and contractual commitments that might be required by another supplier in order to provide the components or materials.

~~The impact of foreign trade relations and associated tariffs, as well as our reliance on international suppliers for certain raw materials, could adversely impact our business.~~

We currently source certain raw materials from international suppliers. Import tariffs, taxes, customs duties and/or other trade regulations imposed by the U.S. government on foreign countries, or by foreign countries on the United States, could significantly increase the prices we pay for certain raw materials, such as steel, aluminum and purchased components, that are critical to our ability to manufacture components for our customers. The international sourcing for these materials may also be hurt by health concerns regarding infectious diseases in countries in which these materials are purchased from (such as COVID-19), adverse weather or natural disasters. In addition, we may be unable to find a domestic supplier to provide the necessary raw materials on an economical basis in the amounts we require. If the cost of our raw materials increases, or if we are unable to procure the necessary raw materials required to manufacture our components, then we could experience a negative impact on our operating results, profitability, customer relationships and future cash flows.

Additionally, our customers’ businesses may be negatively impacted by import tariffs, taxes, customs duties and/or other trade regulations imposed by the U.S. government on foreign countries or by foreign countries on the United States, which could, in turn, reduce our customers’ demand for the components that we manufacture for them. Any reduction in customer demand for our components as a result of such tariffs, taxes, customs duties and/or other trade regulations, or as a result of the impact of infectious diseases such as COVID-19. could have a material adverse impact on our financial position, results of operations, cash flows and liquidity.

~~Because our industry is capital intensive and we have significant fixed and semi-fixed costs, our profitability is sensitive to changes in volume.~~

The property, plants and equipment needed to produce components for our customers and provide our processes and solutions can be very expensive. We must spend a substantial amount of capital to purchase and maintain such property, plants and equipment. Although we believe our current cash balance, along with our projected internal cash flows and available financing sources, will provide sufficient cash to support our currently anticipated operating and capital needs, if we are unable to generate sufficient cash to purchase and maintain the property, plants and equipment necessary to operate our business, we may be required to reduce or delay planned capital expenditures or to incur additional indebtedness.

~~The risks associated with climate change, as well as climate change legislation and regulations, could adversely affect our operations and financial condition.~~

The physical risks of climate change, such as more frequent or more extreme weather events, changes in temperature and precipitation patterns, changes to ground and surface water availability and other related phenomena, could affect some, or all, of our operations. Severe weather or other natural disasters could be destructive, which could result in increased costs, including supply chain costs.

In addition, a number of government bodies have finalized, proposed or are contemplating legislative and regulatory changes in response to growing concerns about climate change. In recent years, federal, state and local governments have taken steps to reduce emissions of greenhouse gases (GHGs). The Environmental Protection Agency has finalized a series of GHG monitoring, reporting and emissions control rules for certain large sources of GHGs, and the U.S. Congress has, from time to time, considered adopting legislation to reduce GHG emissions. Numerous states have already taken measures to reduce GHG emissions, primarily through the development of GHG emission inventories and/or regional GHG cap-and-trade programs.

Although it is not possible at this time to predict how future legislation or regulations to address GHG emissions would impact our business, any such laws and regulations imposing reporting obligations on, or limiting emissions of GHGs from, our equipment and operations, could require us to incur costs to reduce GHG emissions associated with our operations. We cannot assure you that our costs, liabilities and obligations relating to environmental matters will not have a material adverse effect on our business, financial condition, results of operations and cash flows.

~~Our manufacturing, painting and coating operations are subject to environmental, health and safety laws and regulations that could result in liabilities to us.~~

Our manufacturing, painting and coating operations are subject to environmental, health and safety laws and regulations, including those governing discharges to air and water, the management and disposal of hazardous substances, the cleanup of contaminated sites and health and safety matters. We could incur material costs, including cleanup costs, civil and criminal fines, penalties and third-party claims for cost recovery, property damage or personal injury as a result of violations of or liabilities under such laws and regulations. The ultimate cost of remediating contaminated sites, if any, is difficult to accurately predict and could exceed estimates. In addition, as environmental, health and safety laws and regulations have tended to become stricter, we could incur additional costs complying with requirements that are promulgated in the future.

If our manufacturing processes do not comply with applicable statutory and regulatory requirements, or if we manufacture components containing manufacturing defects, demand for our capabilities may decline and we may be subject to liability claims.

Our manufacturing processes and facilities need to comply with applicable statutory and regulatory requirements. We may also have the responsibility to ensure that the processes we use satisfy safety and regulatory standards, including those applicable to our customers and to obtain any necessary certifications. In addition, our customers’ products, as well as the manufacturing processes and components that we use to produce such products, are often highly complex. As a result, components that we manufacture may at times contain manufacturing defects, and our manufacturing processes may be subject to errors or not be in compliance with applicable statutory and regulatory requirements or demands of our customers. Defects in the components we manufacture, whether caused by a manufacturing or component failure or error, or deficiencies in our manufacturing processes, may result in delayed shipments to customers, replacement costs or reduced or cancelled customer orders. If these defects or deficiencies are significant, our business reputation may also be damaged. The failure of the components that we manufacture for our customers to comply with applicable statutory and regulatory requirements may subject us to legal fines or penalties and, in some cases, require us to shut down or incur considerable expense to correct a manufacturing process or facility. In addition, these defects may expose us to liability to pay for the recall of a customer’s product or to indemnify our customers for the costs of any such claims or recalls which they face as a result of using items manufactured by us in their products.

Adverse judgments or settlements in legal disputes, including product liability, intellectual property infringement and other claims, could result in materially adverse monetary damages or injunctive relief and damage our business and/or our reputation.

We are subject to, and may become a party to, a variety of litigation or other claims and suits that arise from time to time in the ordinary course of our business. The results of litigation and other legal proceedings are inherently uncertain and adverse judgments or settlements in some or all of these legal disputes may result in materially adverse monetary damages or injunctive relief against us. Additionally, our insurance policies may not protect us against potential liability due to various exclusions in the policies and self-insured retention amounts. Partially or completely uninsured claims, if successful and of significant magnitude, could have a material adverse effect on our business, financial condition and results of operations. Furthermore, any claims or litigation, even if fully indemnified or insured, could damage our reputation and make it more difficult to compete effectively or obtain adequate insurance in the future.

The components we manufacture can expose us to potential liabilities. For instance, our manufacturing operations expose us to potential product liability claims resulting from injuries caused by defects in components we design or manufacture, as well as potential claims that components we design infringe on third-party intellectual property rights. Such claims could subject us to significant liability for damages, subject the infringing portion of our business to injunction and, regardless of their merits, could be time-consuming and expensive to resolve. We may also have greater potential exposure from warranty claims and recalls due to problems caused by component or product design. Although we have product liability insurance coverage, it may not be sufficient to cover the full extent of our product liability, if at all. A successful product liability claim in excess or outside of our insurance coverage or any material claim for which insurance coverage was denied or limited and for which indemnification was not available could have a material adverse effect on our business, results of operations and/or financial condition.

~~Increases in the cost of employee benefits could impact our financial results and cash flows.~~

Our expenses relating to employee health benefits are significant. Unfavorable changes in the cost of and the unpredictability of claims under such benefits, including as a result of the COVID-19 pandemic, could impact our financial results and cash flows. Healthcare costs have risen significantly in recent years, and recent legislative and private sector initiatives regarding healthcare reform could result in significant changes to the U.S. healthcare system. Pursuant to the Affordable Care Act, employees may be ineligible for certain healthcare subsidies if such employee is eligible and offered qualifying and affordable healthcare coverage under an employer’s plan. Due to the breadth and complexity of the healthcare reform legislation, the lack of implementing regulations and interpretive guidance and the uncertainty surrounding further reform proposals, we are not able to fully determine the impact that healthcare reform will have in the future on company sponsored medical plans.

~~Compliance or the failure to comply with regulations and governmental policies could cause us to incur significant expense.~~

We are subject to a variety of local and foreign laws and regulations including those relating to labor and health and safety concerns. Such laws may require us to pay mandated compensation and penalties. Additionally, we may need to obtain and maintain licenses and permits to conduct business in various jurisdictions. If we or the businesses or companies we acquire have failed or fail in the future to comply with such laws and regulations, then we could incur liabilities and fines and our operations could be suspended. Such laws and regulations could also restrict our ability to modify or expand our facilities, could require us to acquire costly equipment, or could impose other significant expenditures.

Prior to our initial public offering, we were treated as an S Corporation, and claims of taxing authorities related to our prior status as an S Corporation could have an adverse effect on our business, financial condition and results of operations.

Upon the consummation of our initial public offering, our status as an S Corporation was terminated and we have since been treated as a “C Corporation” for U.S. federal income tax purposes and thus are now subject to U.S. federal income tax. If the unaudited, open tax years in which we were an S Corporation are audited by the Internal Revenue Service (IRS), and we determined not to have qualified for, or to have violated any requirement for maintaining our S Corporation status, we will be obligated to pay back taxes, interest and possibly penalties. The amounts that we would be obligated to pay could include taxes on all our taxable income attributable to such open tax years. Any such claims could result in additional costs to us and could have a material adverse effect on our business, financial condition and results of operations.

Prior to the completion of our initial public offering we were 100% owned by the ESOP, which is a retirement plan intended to be tax-qualified. If the ESOP fails to meet the requirements of a tax-qualified retirement plan, we could be subject to substantial penalties.

The Mayville Engineering Company, Inc. Employee Stock Ownership Plan (the ESOP), is a defined contribution retirement plan subject to the requirements of the Internal Revenue Code of 1986, as amended (the Code), and the Employee Retirement Income Security Act of 1974, as amended (ERISA). The ESOP has received a determination letter from the IRS that it meets the requirements of a tax-qualified retirement plan in form and we endeavor to maintain and administer the ESOP in compliance with all requirements of the Code and ERISA. However, the rules regarding tax-qualified plans, and especially ESOPs, are complex and change frequently. Accordingly, it is possible that the ESOP may not have been and may not in the future be administered in full compliance with all applicable rules under the Code or ERISA.

If the IRS were to determine that the ESOP was not in material compliance with the Code or ERISA, then the ESOP could lose its tax-qualified status and we could be subject to substantial penalties under the Code and/or ERISA, which could have a material adverse effect on our business, financial condition or results of operations. Additionally, any retroactive loss of the ESOP’s tax-qualified status would adversely impact our prior treatment as an S Corporation. See “—Prior to our initial public offering, we were treated as an S Corporation, and claims of taxing authorities related to our prior status as an S Corporation could have an adverse effect on our business, financial condition and results of operations.”

~~Any failure to protect our customers’ intellectual property that we use in the products we manufacture for them could harm our customer relationships and subject us to liability.~~

The products we manufacture for our customers often contain our customers’ intellectual property, including copyrights, patents, trade secrets and know-how. Our success depends, in part, on our ability to protect our customers’ intellectual property. The steps we take to protect our customers’ intellectual property may not adequately prevent its disclosure or misappropriation. If we fail to protect our customers’ intellectual property, our customer relationships could be harmed, and we may experience difficulty in establishing new customer relationships. In addition, our customers might pursue legal claims against us for any failure to protect their intellectual property, possibly resulting in harm to our reputation and our business, financial condition and operating results.

~~Our Amended and Restated Credit Agreement restricts our ability and the ability of our subsidiaries to engage in some business and financial transactions.~~

On September 26, 2019, and as last amended as of June 30, 2020, we entered into an amended and restated credit agreement (Credit Agreement) with certain lenders and Wells Fargo Bank, National Association, as administrative agent. The Credit Agreement provides for (i) a $200.0 million revolving credit facility (the Revolving Loan), with a letter of credit sub-facility in an aggregate amount not to exceed $5.0 million, and a swingline facility in an aggregate amount of $20.0 million. The Credit Agreement also provides for an additional $100.0 million of capacity through an accordion feature.

~~Our Credit Agreement contains a number of covenants that limit our ability and the ability of our subsidiaries to:~~

Our Credit Agreement also requires us to maintain a minimum interest coverage ratio and a consolidated total leverage ratio, and contains certain customary representations and warranties, affirmative covenants and events of default (including, among others, payment default, covenant default, breach of representation or warranty, bankruptcy, cross-default, material ERISA events, certain changes of control, material money judgements and failure to maintain subsidiary guarantees). If an event of default occurs under the Credit Agreement, the lenders under the Credit Agreement will be entitled to take various actions, including the acceleration of amounts due thereunder, the termination of such credit facility and all actions permitted to be taken by a secured creditor. Our failure

to comply with our obligations under the Credit Agreement may result in an event of default under the Credit Agreement. A default, if not cured or waived, may permit acceleration of our indebtedness. If our indebtedness is accelerated, we cannot be certain that we will have sufficient funds available to pay the accelerated indebtedness or that we will have the ability to refinance the accelerated indebtedness on terms favorable to us or at all.

~~We are able to incur additional debt, which could reduce our ability to satisfy our current obligations under our existing indebtedness.~~

At December 31, 2020, we had $45.3 million outstanding under the Revolving Loan. In addition, we may be able to incur significant additional indebtedness in the future, and we may do so, among other reasons, to fund acquisitions as part of our growth strategy. Although the Credit Agreement contains restrictions on the incurrence of additional indebtedness, these restrictions are subject to a number of qualifications and exceptions, and we could incur substantial additional indebtedness in compliance with these restrictions.

Your ability to influence corporate matters may be limited because the ESOP and our 401(k) plan own a substantial amount of our stock and continue to have significant influence over us, which may limit your ability to influence the outcome of important transactions, including a change in control.

As of December 31, 2020, our employees and certain former employees, through their interests in the ESOP and the Mayville Engineering Company, Inc. 401(k) Plan (the 401(k) Plan), beneficially owned approximately 55.2% of the outstanding shares of our common stock. Each participant in the ESOP and the 401(k) Plan is entitled to direct the vote of the shares allocated to his or her accounts, in his or her sole discretion. As a result, our employees and former employees, if acting together, will be able to influence or control matters requiring approval by our shareholders, including the election of directors, influence over our management and policies and the approval of mergers, acquisitions or other extraordinary transactions. As employees and former employees, the ESOP and 401(k) Plan participants’ interests may be contrary to other investors. This concentration of ownership may have the effect of delaying, preventing or deterring a change in control of our company, could deprive our non-ESOP and non-401(k) Plan shareholders of an opportunity to receive a premium for their common stock as part of a sale of our company and might ultimately affect the market price of our common stock.

~~The Trustees of the ESOP and the 401(k) Plan may have the power to vote a large block of shares on matters presented to shareholders for approval.~~

ESOP and 401(k) Plan participants have the right to direct the vote of the shares allocated to his or her ESOP and 401(k) Plan accounts. However, if a participant does not timely direct the voting of his or her shares, then (1) GreatBanc Trust Company (the ESOP Trustee) will vote such shares in its independent fiduciary discretion and (2) Wells Fargo Bank, N.A. (the 401(k) Plan Trustee) will vote such shares as directed by the 401(k) Plan sponsor, which is the Company. Additionally, the ESOP Trustee and the 401(k) Plan Trustee have fiduciary duties under ERISA which may cause the ESOP Trustee or the 401(k) Plan Trustee to override participants’ voting discretions. Consequently, there may be circumstances in which the ESOP Trustee and the 401(k) Plan Trustee have the ability to vote a significant block of shares on matters presented to shareholders for approval. The ESOP and the 401(k) Plan, which as retirement plans have the purpose of providing retirement benefits to current and former employees of the Company and their beneficiaries, may have interests that are different from other investors and may vote in a way with which other shareholders disagree and which may be adverse to other shareholders interests.

~~The market price of our common stock may be volatile, and you could lose all or part of your investment.~~

Since our initial public offering in May 2019, the market price of our common stock has been volatile and has been and could continue to be subject to wide fluctuations in response to various factors, some of which are beyond our control. These fluctuations could cause investors to lose all or part of their investment in our common stock. Factors that could cause fluctuations in the market price of our common stock include the following: sales of substantial amounts of our securities by our directors, executive officers or significant shareholders (including our current and former employees via the ESOP and the 401(k) Plan) or the perception that such sales could occur; general economic and political conditions such as the COVID-19 pandemic, recessions, interest rates, tariffs, fuel prices, international currency fluctuations and acts of war or terrorism; price and volume fluctuations in the overall stock market from time to time; relatively small percentage of our common stock available publicly; actual or anticipated fluctuations in our quarterly financial results or the quarterly financial results of companies perceived to be similar to us; changes in the market’s expectations about our operating results; changes in our orders in a given period; success of competitors; our operating results failing to meet the expectation of securities analysts or investors in a particular period; changes in financial estimates and recommendations by securities analysts concerning us or the markets in general; operating and stock price performance of other companies that investors deem comparable to us; our ability to manufacture new and enhanced components for the products of our customers on a timely basis; changes in laws and regulations affecting our business; commencement of, or involvement in, litigation involving us; changes in our

capital structure, such as future issuances of securities or the incurrence of additional debt; the volume of securities available for public sale; any major change in our board of directors or management; and changes in our investor base.

In the past, following periods of volatility in the overall market and the market price of a particular company’s securities, securities class action litigation has often been instituted against these companies. This litigation, if instituted against us, could result in substantial costs and a diversion of our management’s attention and resources.

The continued operation and growth of our business, including acquisitions and capital expenditures, will require substantial cash. Accordingly, we do not anticipate declaring any cash dividends to holders of our common stock in the foreseeable future. Any determination to pay dividends in the future will be at the discretion of our board of directors and will depend upon results of operations, financial condition, any contractual restrictions, our indebtedness, restrictions imposed by applicable law and other factors our board of directors deem relevant. Consequently, investors may need to sell all or part of their holdings of our common stock after price appreciation, which may never occur, as the only way to realize any future gains on their investment.

~~Some provisions of Wisconsin law and our articles of incorporation and bylaws could make a merger, tender offer or proxy contest difficult, thereby depressing the trading price of our common stock.~~

Our status as a Wisconsin corporation and the anti-takeover provisions of the Wisconsin Business Corporation Law (the WBCL) may discourage, delay or prevent a change in control even if a change in control would be beneficial to our shareholders by prohibiting us from engaging in a business combination with an interested shareholder for a period of three years after the person becomes an interested shareholder. We may engage in a business combination with an interested shareholder after the expiration of the three-year period with respect to that shareholder only if one or more of the following conditions is satisfied: (i) our board of directors approved the acquisition of the stock before the date on which the shareholder acquired the shares, (ii) the business combination is approved by a majority of our outstanding voting stock not beneficially owned by the interested shareholder or (iii) the consideration to be received by shareholders meets certain fair prices requirements of the WBCL with respect to form and amount.

~~In addition, our articles of incorporation and bylaws contain provisions that may make the acquisition of the company more difficult, including the following:~~

These provisions could have the effect of discouraging, delaying or preventing a transaction involving a change in control of the Company. These provisions could also have the effect of discouraging proxy contests and make it more difficult for shareholders to elect directors of their choosing or prevent us from taking other corporate actions that shareholders may desire.

~~The requirements of being a public company may strain our resources and distract our management, which could make it difficult to manage our business.~~

As a public company, we are required to comply with various regulatory and reporting requirements, including those required by the SEC. Complying with these reporting and other regulatory requirements are time-consuming and result in increased costs to us and could have a negative effect on our business, financial condition and operating results.

As a public company, we are subject to the reporting requirements of the Securities Exchange Act of 1934, as amended (the Exchange Act), and the requirements of the Sarbanes-Oxley Act of 2002 (the Sarbanes-Oxley Act). These requirements may place a strain on our systems and resources. The Exchange Act requires that we file annual, quarterly and current reports with respect to our business and financial condition. The Sarbanes-Oxley Act requires that we maintain effective disclosure controls and procedures and internal controls over financial reporting. In addition, Section 404 of the Sarbanes-Oxley Act requires annual management assessments of the effectiveness of our internal control over financial reporting and a report by our independent auditors addressing these assessments. Under the Jumpstart Our Business Startups Act of 2012 (JOBS Act), as an “emerging growth company” we are only subject to management reporting on the assessment of internal control over financial reporting currently. Assuming we have not ceased to qualify as an “emerging growth company” earlier, we will be required to ~~comply with both~~be included in paragraph 4. This Form 10-K/A does not reflect events occurring after the ~~management and the auditor assessment of internal control over financial reporting requirements of Section 404 at the time we file our annual report for 2024.~~

To maintain and improve the effectiveness of our disclosure controls and procedures and our internal controls over financial reporting, we may need to commit significant resources, hire additional staff and provide additional management oversight. We have and continue to implement additional procedures and processes for the purpose of addressing the standards and requirements applicable to public companies. Sustaining our growth also requires us to commit additional management, operational and financial resources to identify new professionals to join the Company and to maintain appropriate operational and financial systems to adequately support expansion. These activities may divert management’s attention from other business concerns, which could have a material adverse effect on our business, financial condition and operating results.

If we fail to maintain an effective system of internal controls in the future, or if we experience any additional material weaknesses in the future, we may not be able to accurately or timely report our financial condition or results of operations, which may adversely affect investor confidence in us and, as a result, the value of our common stock.

~~As a public company, we are required to document and assess the effectiveness of our system of internal controls over financial reporting to satisfy the requirements~~filing of the ~~Sarbanes-Oxley Act.~~

While preparing for the IPO in 2019 and as of December 31, 2019, we identified material weaknesses in the design and operation of our internal control over financial reporting that have been remediated as of December 31, 2020. In 2019 and 2020, we have taken numerous steps to enhance our internal control environment and remediate the prior material weaknesses. Despite these actions, we may identify additional material weaknesses in our internal control over financial reporting in the future.

If we identify future material weaknesses in our internal control over financial reporting or if we are unable to comply with the demands that are placed upon us as a public company, including the current and future requirements of Section 404 of the Sarbanes-Oxley Act, in a timely manner, we may be unable to accurately report our financial results, or report them within the timeframes required by the SEC. In addition, if we are unable to assert that our internal control over financial reporting is effective in future years, or if our independent registered public accounting firm is unable to express an opinion as to the effectiveness of our internal control over financial reporting when required, investors may lose confidence in the accuracy and completeness of our financial reports, we may face restricted access to the capital markets and our stock price may be adversely affected.

We are an emerging growth company, and any decision on our part to comply only with certain reduced reporting and disclosure requirements applicable to emerging growth companies could make our common stock less attractive to investors.

We are an “emerging growth company” as defined by the JOBS Act. Under the JOBS Act, emerging growth companies can delay adopting new or revised accounting standards until such time as those standards apply to private companies. We have elected to use this exemption from new or revised accounting standards and, therefore, we will not be subject to the same new or revised accounting standards as other public companies that have not made this election.

For as long as we continue to be an emerging growth company, we also intend to take advantage of certain other exemptions from various reporting requirements that are applicable to other public companies including, but not limited to, reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements, and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and shareholder approval of any golden parachute payments not previously approved. We cannot predict if investors will find our common stock less attractive because we will rely on these exemptions. If some investors find our common stock less attractive as a result, there may be a less active trading market for our common stock and our stock price may be more volatile.

We will remain an emerging growth company until the earliest of (i) the last day of the year which we have total annual gross revenue of $1.07 billion or more; (ii) the last day of the year following the fifth anniversary of the date of the closing of our initial public offering; (iii) the date on which we have issued more than $1.0 billion in nonconvertible debt during the previous three years; or (iv) the date on which we are deemed to be a large accelerated filer under the rules of the SEC.

~~Our business and stock price may suffer as a result of our lack of public company operating experience.~~

The obligations of being a public company, including substantial public reporting, auditing and investor relations obligations, require significant additional expenditures, place additional demands on our management and require the hiring of additional personnel. These obligations increase our operating expenses and could divert our management’s attention from our operations. The Sarbanes-Oxley Act and the SEC rules and regulations implementing such Act, as well as various New York Stock Exchange (the NYSE) rules, required us to implement additional corporate governance practices and may require further changes. These rules and regulations increase our legal and financial compliance costs, and make some activities more difficult, time-consuming and/or costly. These rules and regulations could also make it more difficult for us to attract and retain qualified independent members of our board of directors and qualified members of our management team.

We maintain 19 strategically located U.S. facilities that are in operation comprising approximately 2.7 million square feet of manufacturing space. We are headquartered in Mayville, WI. We believe that our facilities are sufficient to meet our current and near-term manufacturing needs.

~~Facility~~	~~Description of Use~~	~~Approximate Square Feet~~		~~Ownership~~
~~1. Mayville, WI~~	~~Manufacturing / Corporate Headquarters~~		~~340,000~~	~~Owned~~
~~2. Mayville, WI~~	~~Manufacturing~~		~~167,000~~	~~Owned~~
~~3. Defiance, OH~~	~~Manufacturing~~		~~250,000~~	~~Owned~~
~~4. Defiance, OH~~	~~Manufacturing~~		~~192,000~~	~~Owned~~
~~5. Defiance, OH~~	~~Manufacturing~~		~~90,000~~	~~Leased~~
~~6. Beaver Dam, WI~~	~~Manufacturing~~		~~303,000~~	~~Owned~~
~~7. Beaver Dam, WI~~	~~Manufacturing~~		~~163,000~~	~~Owned~~
~~8. Heber Springs, AR~~	~~Manufacturing~~		~~190,000~~	~~Owned~~
~~9. Bedford, PA~~	~~Manufacturing~~		~~181,000~~	~~Leased~~
~~10. Wautoma, WI~~	~~Manufacturing~~		~~157,000~~	~~Owned~~
~~11. Atkins, VA~~	~~Manufacturing~~		~~150,000~~	~~Owned~~
~~12. Byron Center, MI~~	~~Manufacturing~~		~~138,000~~	~~Leased~~
~~13. Neillsville, WI~~	~~Manufacturing~~		~~58,000~~	~~Owned~~
~~14. Neillsville, WI~~	~~Manufacturing~~		~~42,000~~	~~Owned~~
~~15. Vanderbilt, MI~~	~~Manufacturing~~		~~50,000~~	~~Owned~~
~~16. Vanderbilt, MI~~	~~Manufacturing~~		~~40,000~~	~~Owned~~
~~17. Greenville, MS~~	~~Manufacturing~~		~~76,000~~	~~Leased~~
~~18. Wayland, MI~~	~~Manufacturing~~		~~75,000~~	~~Leased~~
~~19. Piedmont, MI~~	~~Manufacturing~~		~~34,000~~	~~Leased~~
~~TOTAL~~			~~2,696,000~~

We are not currently a party to any material litigation proceedings. From time to time, however we may be a party to litigation and subject to claims incident to the ordinary course of business. Regardless of the outcome, litigation can have an adverse impact on us because of defense and settlement costs, diversion of management resources and other factors.

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

Our common stock is traded on the NYSE under the symbol MEC. As of February 1, 2021, there were two registered shareholders of record of our common stock and thousands of beneficial holders of our common stock, including all the participants in our ESOP and many participants in our 401(k) Plan.

We have never declared or paid any cash dividends on our common stock. We intend to retain all available funds and any future earnings for use in the operation and expansion of our business and do not anticipate declaring or paying any cash dividends in the foreseeable future. Any future determination as to the declaration and payment of dividends will be at the discretion of our board of directors and will depend on then-existing conditions, including our financial condition, results of operations, contractual restrictions, capital requirements, business prospects and other factors that our board of directors considers relevant. In addition, the terms of the Credit Agreement restrict our ability to pay cash dividends to the holders of our common stock.

~~The table below sets forth information with respect to purchases we made of shares of our common stock during the three months ended December 31, 2020:~~

~~See Part III, Item 12, of this Annual Report on Form 10-K for certain information regarding our equity compensation plans.~~

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

Management’s Discussion and Analysis of Financial Condition and Results of Operations is intended to assist in the understanding and assessing the trends and significant changes in our results of operations and financial condition. Historical results may not be indicative of future performance. This discussion includes forward-looking statements that reflect our plans, estimates and beliefs. Such statements involve risks and uncertainties. Our actual results may differ materially from those contemplated by these forward-looking statements as a result of various factors, including those set forth in “Risk Factors” in Part I, Item 1A and “Cautionary Statement Regarding Forward-Looking Statements” of this Annual Report on Form 10-K. This discussion should be read in conjunction with our audited consolidated financial statements and the notes thereto included in Part II, Item 8 of this Annual Report on Form 10-K. In this discussion, we use certain financial measures that are not prepared in accordance with accounting principles generally accepted in the United States of America (GAAP). Explanation of these non-GAAP financial measures and reconciliation to the most directly comparable GAAP financial measures are included in this Management’s Discussion and Analysis of Financial Condition and Results of Operations. Investors should not consider non-GAAP financial measures in isolation or as substitutes for financial information presented in compliance with GAAP.

~~All amounts are presented in thousands except share amounts, per share data, years and ratios.~~

Critical accounting policies are those policies that, in management’s view, are most important in the portrayal of our financial condition and results of operations. The notes to the consolidated financial statements include full disclosure of significant accounting policies. The methods, estimates and judgments that we use in applying our accounting policies have a significant impact on the results that we report in our financial statements. These critical accounting policies require us to make difficult and subjective judgments, often as a result of the need to make estimates regarding matters that are inherently uncertain. Those critical accounting policies and estimates that require the most significant judgment are discussed further below. See Note 1 – Nature of business and summary of significant accounting policies, in the Notes to the Consolidated Financial Statements in Part II, Item 8 of this Annual Report on Form 10-K for more specifics.

Our long-lived assets consist primarily of property, equipment, purchased intangible assets and goodwill. The valuation and the impairment testing of these long-lived assets involve significant judgments and assumptions, particularly as they relate to the identification of reporting units, asset groups and the determination of fair market value.

We test our tangible and intangible long-lived assets subject to amortization for impairment whenever facts and circumstances indicate that the carrying amount of an asset may not be recoverable. We test goodwill and indefinite lived intangible assets for impairment annually, or more frequently if triggering events occur indicating that there may be impairment.

We have recorded goodwill and perform testing for potential goodwill impairment at a reporting unit level. A reporting unit is an operating segment, or a business unit one level below an operating segment for which discrete financial information is available, and for which management regularly reviews the operating results. Additionally, components within an operating segment can be aggregated as a single reporting unit if they have similar economic characteristics. We have performed testing on our one reporting unit.

We determine the fair value of our reporting units using multiple valuation methodologies, relying largely on an income approach but also incorporating value indicators from a market approach. Under the income approach, we calculate the fair value of a reporting unit based on the present value of estimated future cash flows. The income approach is dependent on several key management assumptions, including estimates of future sales, gross margins, operating costs, interest expense, income tax rates, capital expenditures, changes in working capital requirements and the weighted average cost of capital or the discount rate. Discount rate assumptions include an assessment of the risk inherent in the future cash flows of the reporting unit. Expected cash flows used under the income approach are developed in conjunction with our budgeting and forecasting process. Under the market approach, we estimate fair value of the reporting units using EBITDA multiples. The multiples are derived from comparable publicly traded companies with similar operating and investment characteristics as the respective reporting units.

We test our goodwill for impairment on an annual basis in the fourth quarter of each fiscal year, and more frequently if events or changes in circumstances indicate that it might be impaired. Due to the economic conditions during the second quarter of 2020 as a result of the COVID-19 pandemic, we determined that an impairment triggering event occurred, which required an interim quantitative impairment assessment of goodwill. Based on our interim quantitative assessments, the fair value of our reporting unit exceeded our related carrying value by more than 50%, thus no impairment of goodwill was indicated. We also performed our annual qualitative goodwill impairment test during the fourth quarter of fiscal years 2020 and 2019, which did not indicate an impairment existed.

Changes to management assumptions and estimates utilized in the income and market approaches could negatively impact the fair value conclusions for our reporting unit resulting in goodwill impairment. All key assumptions and valuations are determined by

and are the responsibility of management. The factors used in the impairment analysis are inherently subject to uncertainty. We believe that the estimates and assumptions are reasonable to determine the fair value of our reporting unit, however, if actual results are not consistent with these estimates and assumptions, goodwill and other intangible assets may be overstated which could trigger an impairment charge.

For impairment testing of long-lived assets, we identify asset groups at the lowest level for which identifiable cash flows are largely independent of the cash flows of other groups of assets and liabilities. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flow expected to be generated by the assets. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized by the amount by which the carrying amount of the asset exceeds the estimated fair value of the asset. For the years ended December 31, 2020 and 2019, there were no events or changes in circumstances that would indicate a material impairment of our long-lived assets.

Determining the useful life of an intangible asset also requires judgment. Certain intangible assets are expected to have indefinite lives based on their history and our plans to continue to support and build the acquired brands. Other acquired intangible assets such as customer relationships, trade names, and non-compete agreements are expected to have determinable useful lives. The costs of determinable-lived intangibles are amortized to expense over their estimated lives.

The provision for, or benefit from, income taxes includes deferred taxes resulting from temporary differences in income for financial and tax purposes using the liability method. Such temporary differences result primarily from differences in the carrying value of assets and liabilities. Future realization of deferred income tax assets requires sufficient taxable income within the carryback and/or carryforward period available under tax law.

The Company evaluates on a quarterly basis whether, based on all available evidence, it is probable that the deferred income tax assets are realizable. Valuation allowances are established when it is estimated that it is more likely than not that the tax benefit of the deferred tax asset will not be realized. The evaluation includes the consideration of all available evidence, both positive and negative, regarding the estimated future reversals of existing taxable temporary differences, estimated future taxable income exclusive of reversing temporary differences and carryforwards, historical taxable income in prior carryback periods if carryback is permitted, and potential tax planning strategies which may be employed to prevent an operating loss or tax credit carryforward from expiring unused. The verifiable evidence such as future reversals of existing temporary differences and the ability to carryback are considered before the subjective sources such as estimate future taxable income exclusive of temporary differences and tax planning strategies. Additionally, we record uncertain tax positions at their net recognizable amount, based on the amount that management deems is more likely than not to be sustained upon ultimate settlement with the tax authorities in jurisdictions in which we operate.

The Company adopted Accounting Standards Codification 606 January 1, 2019, where the Company recognizes revenue for the transfer of goods or services to a customer in an amount that reflects the consideration it expects to receive in exchange for those goods or services. When goods are shipped, the customer takes ownership at shipment, and this is when control transfers. Sales are supported by documentation such as supply agreements and purchase order, which specify certain terms and conditions including product specifications, quantities, fixed prices, delivery dates and payments terms. Revenue related to services is recognized in the period services are performed, thus the Company recognizes revenue at a point in time.

There are many customers where the Company designs, engineers and builds production tooling, which is purchased by the customer. Most of the tooling revenue is complete at the point the customer signs off on the product through the Product Part Approval Process (PPAP) and the tool is placed into service. Revenue is recognized when control of the tooling promised under a contract is transferred to the customer either at a point in time or over a period of time in an amount that reflects the consideration to which the Company expects to be entitled in exchange for the goods or services.

The Company offers certain customers discounts for early payments. These discounts are recorded against net sales in the Consolidated Statement of Comprehensive Income (Loss) and accounts receivable in the Consolidated Balance Sheets. The Company does not offer any other customer incentives, rebates or allowances.

Under the Mayville Engineering Company, Inc. Employee Stock Ownership Plan (the ESOP), the Company can make annual contributions to the trust for the benefit of eligible employees in the form of cash or shares of common stock of the Company. Prior to December 31, 2019, the annual contribution was discretionary except that it must have been at least 3% of the compensation for all safe harbor participants for the plan year. Beginning on January 1, 2020, all contributions are discretionary. The stock in the ESOP is held in trust for the sole benefit of the participants. Shares allocated to a participant’s account are fully vested.

Upon retirement, death, termination of employment or exercise of diversification rights, the eligible portion of a participant’s ESOP account is redeemable annually at the current price per share of the stock. Under the terms of the ESOP prior to the IPO, we

were obligated to redeem eligible participant account balances for cash (in accordance with the redemption schedule and subject to the limitations set forth in the ESOP). Following the IPO, (i) we no longer redeem participants’ ESOP interests, as distributions from the ESOP made to a participant following retirement, death or termination of employment, or the exercise of diversification rights under the Traditional ESOP, will be made in our common stock, and upon receiving a distribution of our common stock from the ESOP a participant will be able to sell such shares of common stock in the market, subject to any requirements of federal securities law; and (ii) with respect to any participant who exercises statutory diversification rights under the ESOP, the ESOP Trustee will sell, on behalf of the participant, the shares that the participant has elected to diversify and reinvest the sale proceeds in an alternate investment option as directed by the participant.

The JOBS Act permits an “emerging growth company” like us to take advantage of an extended transition period to comply with new or revised accounting standards applicable to public companies. We are choosing to use this provision and, as a result, we will comply with new or revised accounting standards as required for private companies.

Our management is responsible for establishing and maintaining adequate internal control over financial reporting for our company. Internal control over financial reporting is a process to provide reasonable assurance regarding the reliability of our financial reporting and the preparation of financial statements for external purposes in accordance with GAAP. Internal control over financial reporting includes maintaining records that in reasonable detail accurately and fairly reflect our transactions; providing reasonable assurance that transactions are recorded as necessary for preparation of our financial statements; providing reasonable assurance that receipts and expenditures of our assets are made in accordance with management’s authorization; and providing reasonable assurance that unauthorized acquisition, use or disposition of our assets that could have a material effect on the financial statements would be prevented or detected on a timely basis. Because of its inherent limitations, internal control over financial reporting is not intended to provide absolute assurance that a misstatement of our financial statements would be prevented or detected. Furthermore, our controls and procedures can be circumvented by the individual acts of some persons, by collusion of two or more people or by management override of the control, and misstatements due to error or fraud may occur and not be detected on a timely basis.

Our one operating segment focuses on producing metal components that are used in a broad range of heavy- and medium-duty commercial vehicles, construction & access equipment, powersports, agricultural, military and other products.

In May 2019, we completed our IPO. In conjunction with the IPO, the Company’s legacy business converted from an S Corporation to a C Corporation. As a result, the consolidated business is subject to paying federal and state corporate income taxes on its taxable income from May 9, 2019 forward.

~~COVID-19 has had and will continue to have a negative impact on our business, financial condition, cash flows, results of operations and supply chain, although the full extent is still uncertain.~~

For the twelve months ended December 31, 2020, net sales reflected the significant disruption we encountered primarily due to COVID-19 with customer shutdowns, demand changes, and continued destocking, which were most apparent in the commercial vehicle, agriculture and construction & access equipment end markets served. Despite MEC and its customer base carrying the essential business designation, customer production facilities shut down 5 – 6 weeks on average during the second quarter of 2020 due to COVID-19. As a direct result of the customer shutdowns, MEC temporarily halted production at some of its facilities during the second quarter. Customer manufacturing facilities gradually reopened toward the end of the second quarter, but MEC production volumes remained below pre-pandemic levels through the remainder of the year with all MEC facilities open. Despite the decline in volumes for the second, third and fourth quarters due to COVID-19, all pre-existing customer relationships and manufacturing programs remain intact. While end markets have started to stabilize, we have improved our near- and long-term cost structure through facility and process optimization and are actively working with our customers to grow our partnerships while pursuing incremental sales through a wide range of new customer and market opportunities.

The future financial effects of COVID-19 are unknown due to many factors. These factors include uncertainty of the effectiveness of governmental actions to address COVID-19, including health, monetary and fiscal policies, the effect of elevated levels of sovereign and state debt, capital market disruptions, changes in demand and pricing, trade agreements, other geopolitical events, and the availability and volatility in the price of raw materials and other commodities. As a result, predicting the Company’s forecasted financial performance is difficult and subject to many assumptions.

The Company’s first priority has been to safeguard the health and well-being of its employees while fulfilling its obligations as an essential business serving its customer base. This proactive approach has kept employees safe and production facilities operational based on customer demand. Our goal is to continue to successfully manage through the effects of COVID-19 and strengthen our position serving customers in the future.

~~Net Sales.~~ Net sales reflect sales of our components and products net of allowances for returns and discounts. Several factors affect our net sales in any given period, including general economic conditions, weather, timing of acquisitions and the production schedules of our customers. Net sales are recognized at the time of shipment to the customer.

~~Manufacturing Margins.~~ Manufacturing margins represents net sales less cost of sales. Cost of sales consists of all direct and indirect costs used in the manufacturing process, including raw materials, labor, equipment costs, depreciation, lease expenses, subcontract costs and other directly related overhead costs. Our cost of sales is directly affected by the fluctuations in commodity prices, primarily sheet steel and aluminum, but these changes are largely mitigated by contractual agreements with our customers that allow us to pass through these price changes based upon certain market indexes.

~~Depreciation and Amortization.~~ We carry property, plant and equipment on our balance sheet at cost, net of accumulated depreciation and amortization. Depreciation on property, plant and equipment is computed on a straight-line basis over the estimated useful life of the asset. Amortization expense is the periodic expense related to leasehold improvements and intangible assets. Leasehold improvements are amortized over the lesser of the life of the underlying asset or the remaining lease term. Our intangible assets were recognized as a result of certain acquisitions and are generally amortized on a straight-line basis over the estimated useful lives of the assets.

~~Other Selling, General, and Administrative Expenses.~~ Other selling, general and administrative expenses consist primarily of salaries and personnel costs for our sales and marketing, finance, human resources, information systems, administration and certain other managerial employees and certain corporate level administrative expenses such as incentive compensation, audit, accounting, legal and other consulting and professional services, travel, and insurance.

~~EBITDA represents net income before interest expense, provision (benefit) for income taxes, depreciation and amortization. EBITDA Margin represents EBITDA as a percentage of net sales for each period.~~

Adjusted EBITDA represents EBITDA before transaction fees incurred in connection with the DMP acquisition and the IPO, the loss on debt extinguishment relating to our December 2018 credit agreement, non-cash purchase accounting charges including

costs recognized on the step-up of acquired inventory and contingent consideration fair value adjustments, one-time increases in deferred compensation and long term incentive plan expenses related to the IPO, stock-based compensation, and restructuring expenses related to the closure of the Greenwood facility. Adjusted EBITDA Margin represents Adjusted EBITDA as a percentage of net sales for each period. These metrics are supplemental measures of our operating performance that are neither required by, nor presented in accordance with, GAAP. These measures should not be considered as an alternative to net income or any other performance measure derived in accordance with GAAP as an indicator of our operating performance. We present Adjusted EBITDA and Adjusted EBITDA Margin as management uses these measures as key performance indicators, and we believe they are measures frequently used by securities analysts, investors and other parties to evaluate companies in our industry. These measures have limitations as analytical tools and should not be considered in isolation or as substitutes for analysis of our results as reported under GAAP.

Starting in the first quarter of 2020, we excluded stock-based compensation expense from Adjusted EBITDA. Management excludes this charge when evaluating the performance of the business because it is a non-cash charge, and the Company is able to fund vesting obligations through its Omnibus Incentive Plan. Further, the exclusion of these charges aligns with the calculation of Adjusted EBITDA for purposes of our covenant calculations under the Credit Agreement. And finally, revaluations of grant date fair values can vary significantly with the passage of time without any accounting impact. For example, the fair value of the stock-based compensation awards granted in May 2019 would have been approximately one-third of that value had they been granted at the same time during 2020.

Our calculation of EBITDA, EBITDA Margin, Adjusted EBITDA and Adjusted EBITDA Margin may not be comparable to the similarly named measures reported by other companies. Potential differences between our measures of EBITDA and Adjusted EBITDA compared to other similar companies’ measures of EBITDA and Adjusted EBITDA may include differences in capital structure and tax positions.

The following table presents a reconciliation of net income (loss), the most directly comparable measure calculated in accordance with GAAP, to EBITDA and Adjusted EBITDA, and the calculation of EBITDA Margin and Adjusted EBITDA Margin for each of the periods presented.

Twelve Months Ended
December 31,

2020

2019

2018

Net income (loss)

$
(7,092
)

$
(4,753
)

$
17,935

Interest expense

2,668

6,728

3,879

Benefit for income taxes

(2,074
)

(4,088
)

(459
)
Depreciation and amortization

32,089

33,002

20,468

EBITDA

25,591

30,890

41,823

Loss on the extinguishment of debt

—

154

814

Costs recognized on step-up of acquired inventory

—

395

583

Contingent consideration revaluation

—

(6,054
)

(21
)
Deferred compensation expense specific to IPO

—

10,159

—

Long term incentive plan expense specific to IPO

—

9,921

—

Other IPO and DMP acquisition related expenses

—

5,744

495

IPO stock-based compensation expense

1,029

1,871

—

Stock based compensation expense

3,703

1,616

—

Greenwood restructuring charges

2,524

—

—

Adjusted EBITDA

$
32,847

$
54,696

$
43,694

Net sales

$
357,606

$
519,704

$
354,526

EBITDA Margin

7.2
%

5.9
%

11.8
%
Adjusted EBITDA Margin

9.2
%

10.5
%

12.3
%

~~Twelve Months Ended December 31, 2020 Compared to Twelve Months Ended December 31, 2019~~

Twelve Months Ended December 31,

2020

2019

Increase (Decrease)

Amount

% of Net
Sales

Amount

% of Net
Sales

Amount
Change

% Change

Net sales

$
357,606

100.0
%

$
519,704

100.0
%

$
(162,098
)

-31.2
%
Cost of sales

326,105

91.2
%

460,986

88.7
%

(134,881
)

-29.3
%
Manufacturing margins

31,501

8.8
%

58,718

11.3
%

(27,217
)

-46.4
%
Amortization of intangibles

10,706

3.0
%

10,706

2.1
%

—

0.0
%
Profit sharing, bonuses and deferred compensation

8,250

2.3
%

25,105

4.8
%

(16,855
)

-67.1
%
Employee stock ownership plan expense

—

0.0
%

5,453

1.0
%

(5,453
)

-100.0
%
Other selling, general and administrative expenses

19,043

5.3
%

25,466

4.9
%

(6,423
)

-25.2
%
Contingent consideration revaluation

—

0.0
%

(6,054
)

-1.2
%

(6,054
)

-100.0
%
Loss from operations

(6,498
)

-1.8
%

(1,958
)

-0.4
%

4,540

231.9
%
Interest expense

(2,668
)

0.7
%

(6,728
)

1.3
%

(4,060
)

-60.3
%
Loss on extinguishment of debt

—

0.0
%

(154
)

0.0
%

(154
)

-100.0
%
Benefit for income taxes

(2,074
)

-0.6
%

(4,088
)

-0.8
%

(2,014
)

-49.3
%
Net loss and comprehensive loss

$
(7,092
)

-2.0
%

$
(4,753
)

-0.9
%

$
2,339

49.2
%
EBITDA

$
25,591

7.2
%

$
30,890

5.9
%

$
(5,299
)

-17.2
%
Adjusted EBITDA

$
32,847

9.2
%

$
54,696

10.5
%

$
(21,849
)

-39.9
%

~~Net Sales.~~ Net sales were $357,606 for the twelve months ended December 31, 2020 as compared to $519,704 for the twelve months ended December 31, 2019 for a decrease of $162,098, or 31.2%, which was driven by volume reductions across nearly all end markets served due to COVID-19, along with continued market demand changes and customer destocking activities which were most apparent in the commercial vehicle, agriculture and construction & access equipment end markets served. Despite MEC and its customer base carrying the essential business designation, customer production facilities shut down 5 – 6 weeks on average during the second quarter of 2020 due to COVID-19. As a direct result of the customer shutdowns, MEC temporarily halted production at some of its facilities during this time period. Customer manufacturing facilities gradually reopened, but MEC production volumes remained below pre-pandemic levels through the remainder of the year. Despite these volume declines, all pre-existing customer relationships and manufacturing programs remain intact.

~~Manufacturing Margins.~~ Manufacturing margins were $31,501 for the twelve months ended December 31, 2020 as compared to $58,718 for the twelve months ended December 31, 2019, a decrease of $27,217, or 46.4%. The decline was mainly driven by the aforementioned volume reductions driven by COVID-19 along with the continued impact of market demand changes and destocking activities resulting in higher under-absorbed manufacturing costs, and $2,524 of restructuring costs related to the Greenwood facility consolidation, the details of which are outlined in Note 22 of the Consolidated Financial Statements. In addition, cost of sales includes approximately $775 of inventory obsolescence and health care charges specific to the estimated potential impacts of COVID-19.

Our traditional methods of determining inventory obsolescence and health care accruals significantly rely upon historical data. When estimating the approximately $775 of COVID-19 reserves during the current year, we had neither historical information, nor much other data from which to compute an estimated impact for this type of event. Nevertheless, the Company believes the obvious risk posed by the pandemic may have a financial impact in these areas. This charge for these COVID-19 specific accruals represents our best good faith estimate of the potential financial impact to the Company based on information available to us. Due to the continued risk posed by COVID-19, these reserves have remained mostly unchanged since establishment during the first quarter of the current year. We will continue to evaluate and report on our position with respect to these reserves as we work through the pandemic and monitor the effectiveness of vaccines.

Manufacturing margin percentages were 8.8% for the twelve months ended December 31, 2020 as compared to 11.3% for the twelve months ended December 31, 2019, a decline of 250 basis points. This decline was mostly attributable to the aforementioned impacts of COVID-19, market demand changes and destocking activities resulting in under-absorbed fixed overhead costs along with Greenwood facility restructuring costs and COVID-19 specific reserves. Based on the cost reduction initiatives enacted, the Company believes manufacturing margin percentages should improve beyond historical percentages when volumes return to historical levels.

~~Amortization of Intangibles Expense.~~ ~~Amortization of intangibles expense was $10,706 for both the twelve months ended December 31, 2020 and 2019.~~

~~Profit Sharing, Bonuses and Deferred Compensation Expenses.~~ Profit sharing, bonuses and deferred compensation expenses were $8,250 for the twelve months ended December 31, 2020 as compared to $25,105 for the twelve months ended December 31, 2019. The prior year included $20,080 of one-time IPO expenses, including $10,159 for deferred compensation and $9,921 for long-term incentive plan. Excluding these items from the prior year, these expenses increased $3,225. The increase is primarily due to increased stock-based compensation expense during 2020 because of the timing of awards.

~~Employee Stock Ownership Plan Expense.~~ Employee stock ownership plan expense was zero for the twelve months ended December 31, 2020 as compared to $5,453 for the twelve months ended December 31, 2019, a decrease of $5,453, or 100.0%. Prior to December 31, 2019, the annual ESOP contribution was discretionary except that it must have been at least 3% of the compensation for all safe harbor participants for the plan year. Beginning in 2020, all contributions are discretionary. The change is due to the decision to eliminate this particular discretionary gain sharing contribution for the fiscal year 2020 as a result of lower financial performance due to the adverse impacts of COVID-19.

~~Other Selling, General and Administrative Expenses.~~ Other selling, general and administrative expenses were $19,043 for the twelve months ended December 31, 2020 as compared to $25,466 for the twelve months ended December 31, 2019. The prior year includes $5,744 of one-time other IPO and DMP acquisition related expenses. Excluding these one-time charges, these expenses decreased $679. The decrease was driven by synergies achieved through the integration of DMP, lower travel and entertainment expenses in the current period due to COVID-19 restrictions, and other cost saving initiatives initiated in the current year, slightly offset by an increase in costs associated with being a publicly traded company.

~~Contingent Consideration Revaluation.~~ The DMP purchase agreement provided for a payout to the previous shareholders of DMP of $7,500, but not more than $10,000 if a certain level of EBITDA was generated during the twelve-month period ended September 30, 2019. We estimated the fair value of the contingent consideration payable balance of $6,076 as of the acquisition date of December 14, 2018. We then remeasured the fair value each quarter through September 30, 2019, with the change recorded as a contingent consideration revaluation adjustment. Based on our calculations in accordance with the purchase agreement, and as agreed to by DMP’s former shareholders, it was determined DMP’s EBITDA fell short of the payout threshold and as a result, the contingent consideration payable balance was adjusted to zero in the third quarter of 2019, resulting in income of $6,054 for the twelve months ended December 31, 2019.

~~Interest Expense.~~ Interest expense was $2,668 for the twelve months ended December 31, 2020 as compared to $6,728 for the twelve months ended December 31, 2019, a decrease of $4,060, or 60.3%. The change is due to lower borrowings during the current period as compared to the same prior year period along with lower interest rates attributable to the more favorable terms afforded under our amended and restated Credit Agreement.

~~Benefit for Income Taxes.~~ Income tax benefits were $2,074 for the twelve months ended December 31, 2020 as compared to $4,088 for the twelve months ended December 31, 2019. The decrease is due to a less pretax loss in the current period. Please reference Note 9 of the Condensed Consolidated Financial Statements for more specifics. As of December 31, 2020, our federal net operating loss (NOL) carryforward was $11,833 driven by the pretax losses incurred during the current year and the entirety of the prior year. The NOL does not expire and will be used to offset future pretax income. We expect our long-term effective tax rate to be 26%, based on current tax regulations.

~~Net Loss and Comprehensive Loss.~~ Net loss and comprehensive loss was $7,092 for the twelve months ended December 31, 2020 as compared to $4,753 for the twelve months ended December 31, 2019. The increase of $2,339 was due to the previously discussed items.

~~EBITDA and EBITDA Margin.~~ EBITDA and EBITDA Margin were $25,591 and 7.2%, respectively, for the twelve months ended December 31, 2020, as compared to $30,890 and 5.9%, respectively, for the twelve months ended December 31, 2019. The $5,299 decline in EBITDA was due to the reduction in sales volumes driven by COVID-19, the decline in market demand, destocking activities, and the Greenwood facility closure costs in the current period.

~~Adjusted EBITDA and Adjusted EBITDA Margin.~~ Adjusted EBITDA and Adjusted EBITDA Margin were $32,847 and 9.2%, respectively, for the twelve months ended December 31, 2020, as compared to $54,696 and 10.5%, respectively, for the twelve months ended December 31, 2019. The decrease in Adjusted EBITDA of $21,849 was primarily due to the reduction in sales volumes in the current period driven by COVID-19, the decline in market demand, and destocking activities.

~~Twelve Months Ended December 31, 2019 Compared to Twelve Months Ended December 31, 2018~~

Twelve Months Ended December 31,

2019

2018

Increase (Decrease)

Amount

% of Net
Sales

Amount

% of Net
Sales

Amount
Change

% Change

Net sales

$
519,704

100.0
%

$
354,526

100.0
%

$
165,178

46.6
%
Cost of sales

460,986

88.7
%

303,948

85.7
%

157,038

51.7
%
Manufacturing margins

58,718

11.3
%

50,578

14.3
%

8,141

16.1
%
Amortization of intangibles

10,706

2.1
%

4,096

1.2
%

6,610

161.4
%
Profit sharing, bonuses and deferred compensation

25,105

4.8
%

8,058

2.3
%

17,047

211.6
%
Employee stock ownership plan expense

5,453

1.0
%

4,000

1.1
%

1,453

36.3
%
Other selling, general and administrative expenses

25,466

4.9
%

12,276

3.5
%

13,190

107.5
%
Contingent consideration revaluation

(6,054
)

-1.2
%

(21
)

0.0
%

(6,033
)

-28728.6
%
Income (loss) from operations

(1,958
)

-0.4
%

22,169

6.3
%

(24,127
)

-108.8
%
Interest expense

(6,728
)

1.3
%

(3,879
)

1.1
%

2,849

73.5
%
Loss on extinguishment of debt

(154
)

0.0
%

(814
)

0.2
%

(660
)

-81.1
%
Benefit for income taxes

(4,088
)

-0.8
%

(459
)

-0.1
%

3,628

790.0
%
Net income (loss) and comprehensive income (loss)

$
(4,753
)

-0.9
%

$
17,935

5.1
%

$
(22,688
)

-126.5
%
EBITDA

$
30,890

5.9
%

$
41,823

11.8
%

$
(10,933
)

-26.1
%
Adjusted EBITDA

$
54,696

10.5
%

$
43,694

12.3
%

$
11,002

25.2
%

~~Net Sales.~~ Net sales were $519,704 for the twelve months ended December 31, 2019 as compared to $354,526 for the twelve months ended December 31, 2018 for an increase of $165,178, or 46.6%, which was driven by approximately $189,000 of net contributions from the former DMP locations slightly offset by modest declines within our legacy business. Both the legacy MEC and former DMP businesses were adversely impacted by sudden declines in market demand that began late in the third quarter and continued through the fourth quarter, particularly in the commercial vehicle (CV), agricultural and construction & access equipment end markets served. These market demand changes drove destocking activities which had a more pronounced impact on the legacy MEC business, especially in the fourth quarter. Destocking stems from lower retail sales resulting in customer decisions to reduce dealer inventory levels by reducing and curtailing near-term production schedules. In addition, several key customers in the CV market experienced labor union issues in the third and fourth quarters of 2019, which negatively impacted production schedules for both the legacy MEC and former DMP businesses.

~~Manufacturing Margins.~~ Manufacturing margins were $58,718 for the twelve months ended December 31, 2019 as compared to $50,578 for the twelve months ended December 31, 2018, an increase of $8,141, or 16.1%. The increase was driven by approximately $21,000 of contributions from the former DMP locations slightly offset by modest declines at the legacy MEC locations. The declines in market demand, destocking, and impact of customer labor issues adversely impacted volumes and the labor absorption associated with it. These circumstances, along with the costs associated with working through the consolidation of the Company’s Virginia facilities, shift consolidations across multiple facilities and increased healthcare costs, coupled with fewer working days in the fourth quarter, negatively impacted our costs. These conditions collectively produced an unusual amount of under-absorbed manufacturing expenses and lower manufacturing margins in the third quarter and especially in the fourth quarter of 2019.

~~Amortization of Intangibles.~~ Amortization of intangibles expense was $10,706 for the twelve months ended December 31, 2019 as compared to $4,096 for the twelve months ended December 31, 2018. The increase of $6,610, or 161.4%, was solely due to the amortization expense associated with the identifiable intangible assets from the DMP acquisition.

~~Profit Sharing, Bonuses and Deferred Compensation.~~ Profit sharing, bonuses, and deferred compensation expenses were $25,105 for the twelve months ended December 31, 2019 as compared to $8,058 for the twelve months ended December 31, 2018. The increase of $17,047 was primarily driven by a one-time increase of $10,159 in deferred compensation plan expense and a one-time increase of $9,921 in long term incentive plan (LTIP) expense, both related to the IPO, offset by approximately a $2,600 reduction in annual incentive-based bonus expense.

~~Employee Stock Ownership Plan Expense.~~ Employee stock ownership plan expense was $5,453 for the twelve months ended December 31, 2019 as compared to $4,000 for the twelve months ended December 31, 2018. The increase of $1,453, or 36.3%, was primarily due to the addition of plan participants as a result of the DMP acquisition.

~~Other Selling, General and Administrative Expenses.~~ ~~Other selling, general and administrative expenses were $25,466 for the twelve months ended December 31, 2019 as compared to $12,276 for the twelve months ended December 31, 2018. The increase of~~

$13,190, or 107.5%, was driven by $5,744 of one-time IPO and DMP acquisition expenses, approximately $5,300 from the former DMP acquired entities, and additional costs associated with being a publicly traded company.

~~Contingent Consideration Revaluation.~~ The DMP purchase agreement provided for a payout to the previous shareholders of DMP of $7,500, but not more than $10,000 if a certain level of EBITDA was generated during the twelve-month period ended September 30, 2019. We estimated the fair value of the contingent consideration payable balance of $6,076 as of the acquisition date. We then remeasured the fair value each quarter through September 30, 2019, with the change recorded as a contingent consideration revaluation adjustment. Based on our calculations in accordance with the purchase agreement, and as agreed to by DMP’s former shareholders, it was determined DMP’s EBITDA fell short of the payout threshold and as a result, the contingent consideration payable balance was adjusted to zero in the third quarter of 2019, resulting in income of $6,054 for the twelve months ended December 31, 2019.

~~Interest Expense.~~ Interest expense was $6,728 for the twelve months ended December 31, 2019 as compared to $3,879 for the twelve months ended December 31, 2018. The increase of $2,849, or 73.5%, was due to additional debt used to fund the DMP acquisition, slightly offset by the partial paydown of our debt with the IPO proceeds in May and net positive cash flows generated by the business.

~~Benefit for Income Taxes.~~ Income tax benefits were $4,088 for the twelve months ended December 31, 2019 as compared to $459 for the twelve months ended December 31, 2018. The current period benefit is the result of the Company’s legacy business converting to a C Corporation in May 2019 and the one-time IPO expenses incurred which are deductible, causing the benefit. Prior to the IPO, the Company’s legacy business was a S Corporation, where substantially all taxes were passed to the shareholders and the Company did not pay federal or state corporate income taxes on its taxable income. The DMP entities have been taxable under the provisions of the Internal Revenue Code and certain state statutes since being acquired. The consolidated business has been subject to paying federal and state corporate income taxes on its taxable income since May 9, 2019.

~~Net Income (Loss) and Comprehensive Income (Loss).~~ Net loss and comprehensive loss was $4,753 for the twelve months ended December 31, 2019 as compared to net income and comprehensive income of $17,935 for the twelve months ended December 31, 2018. The decrease of $22,688 was due to the previously discussed expense increases, most notably the one-time LTIP and deferred compensation plan expenses related to the IPO, and other one-time IPO and DMP acquisition related expenses, slightly offset by the contingent consideration fair value revaluation adjustment and net income generated by DMP.

~~EBITDA and EBITDA Margin.~~ EBITDA and EBITDA Margin were $30,890 and 5.9%, respectively, for the twelve months ended December 31, 2019, as compared to $41,823 and 11.8%, respectively, for the twelve months ended December 31, 2018. The $10,933 decline in EBITDA was due to the previously mentioned increase in LTIP and deferred compensation plan expenses related to the IPO, and other one-time IPO and DMP acquisition related expenses. These one-time expenses and charges were slightly offset by the gain recorded for the DMP contingent consideration fair value revaluation adjustment and the addition of DMP.

~~Adjusted EBITDA and Adjusted EBITDA Margin.~~ Adjusted EBITDA and Adjusted EBITDA Margin were $54,696 and 10.5%, respectively, for the twelve months ended December 31, 2019, as compared to $43,694 and 12.3%, respectively, for the twelve months ended December 31, 2018. The increase in Adjusted EBITDA of $11,002 was primarily driven by the acquisition of DMP.

~~Cash Flows Analysis Twelve Months Ended December 31, 2020 Compared to Twelve Months Ended December 31, 2019~~

~~Operating Activities.~~ Cash provided by operating activities was $36,523 for the twelve months ended December 31, 2020 as compared to $33,402 for the twelve months ended December 31, 2019. The $3,121 increase in operating cash flows was primarily due to a greater reduction in inventory, prepaids and other assets, along with beneficial changes in a variety of other operating assets and liability categories in the current year as compared to the same prior year period. Changes to pricing, payment terms and credit terms did not have a significant impact on changes to working capital items, or any other element of the operating cash flow activities for the periods presented.

~~Investing Activities.~~ Cash used in investing activities was $5,774 for the twelve months ended December 31, 2020, as compared to $28,090 for the twelve months ended December 31, 2019. The $22,316, or 79.4%, decrease in cash used in investing activities was driven by our capital spend changing from a focus on investments in new technology and automation in 2019, to leveraging those investments and preserving cash in 2020. In addition, due to the Greenwood facility closure, the Company generated more proceeds for the sale of equipment in the current period as compared to the same prior year period.

~~Financing Activities.~~ Cash used by financing activities was $30,629 for the twelve months ended December 31, 2020, as compared to cash used in financing activities of $8,400 for the twelve months ended December 31, 2019. The $22,229 change was driven by the use of operating cash flow in the current period to pay down debt as compared to net cash used in the prior year driven by IPO proceeds used to pay down debt.

~~Cash Flows Analysis Twelve Months Ended December 31, 2019 Compared to Twelve Months Ended December 31, 2018~~

~~Operating Activities.~~ Cash provided by operating activities was $33,402 for the twelve months ended December 31, 2019 as compared to $36,715 for the twelve months ended December 31, 2018. The $3,313, or 9.0% decline in operating cash flows was primarily driven by the LTIP payout of approximately $10,600 in the second quarter of 2019 and approximately $5,000 of payments made in 2019 specific to the IPO, offset by additional cash flow generated by the consolidated business during 2019. Changes to pricing, payment terms and credit terms did not have a significant impact on changes to working capital items, or any other element of the operating cash flow activities, for the periods presented.

~~Investing Activities.~~ Cash used in investing activities was $28,090 for the twelve months ended December 31, 2019, as compared to $132,569 for the twelve months ended December 31, 2018. The $104,479, or 78.8%, decrease in cash used in investing activities was predominantly driven by cash utilized to acquire DMP in 2018, slightly offset by greater capital expenditures in 2019.

~~Financing Activities.~~ Cash used by financing activities was $8,400 for the twelve months ended December 31, 2019, as compared to cash provided in financing activities of $98,867 for the twelve months ended December 31, 2018. The $107,267 change was primarily due to $101,763 of net IPO proceeds received in May 2019, net of debt repayments.

On September 26, 2019, and as last amended as of June 30, 2020, we entered into the Credit Agreement with certain lenders and Wells Fargo Bank, National Association, as administrative agent (the Agent). The Credit Agreement provides for a $200,000 Revolving Loan, with a letter of credit sub-facility in an aggregate amount not to exceed $5,000, and a swingline facility in an aggregate amount of $20,000. The Credit Agreement also provides for an additional $100,000 of capacity through an accordion feature. All amounts borrowed under the Credit Agreement mature on September 26, 2024.

Our obligations under the Credit Agreement are secured by first priority security interests in substantially all of our personal property and guaranteed by, and secured by first priority security interests in, substantially all of the personal property of, our direct and indirect subsidiaries: Center Manufacturing, Inc., Center Manufacturing Holdings, Inc., Center—Moeller Products LLC, Defiance Metal Products Co., Defiance Metal Products of Arkansas, Inc., Defiance Metal Products of PA., Inc. and Defiance Metal Products of WI, Inc.

Borrowings under the Credit Agreement bear interest at a fluctuating London Interbank Offered Rate (LIBOR) (which may be adjusted for certain reserve requirements), plus 1.00-2.00% depending on the current Consolidated Total Leverage Ratio (as defined in the Credit Agreement). Under certain circumstances, we may not be able to pay interest based on LIBOR. If that happens, we will be required to pay interest at the Base Rate, which is the sum of (a) the higher of (i) the Prime Rate (as publicly announced by the Agent from time to time) and (ii) the Federal Funds Rate plus 0.50%, plus (b) 0.00% to 1.00%, depending on the current Total Consolidated Leverage Ratio. The Credit Agreement also includes provisions for determining a replacement rate when LIBOR is no longer available.

~~At December 31, 2020, the interest rate on outstanding borrowings under the Revolving Loan was 2.50%. At December 31, 2020, we had availability of $154,743 under the Revolving Loan.~~

We must pay a commitment fee at a rate of 0.20% per annum on the average daily unused portion of the aggregate unused revolving commitments under the Credit Agreement. We must also pay fees as specified in the Fee Letter (as defined in the Credit Agreement) and with respect to any letters of credit issued under the Credit Agreement.

The Credit Agreement contains usual and customary negative covenants for agreements of this type, including, but not limited to, restrictions on our ability to, subject to certain exceptions, create, incur or assume indebtedness, create or incur liens, make certain investments, merge or consolidate with another entity, make certain asset dispositions, pay dividends or other distributions to shareholders, enter into transactions with affiliates, enter into sale leaseback transactions or make capital expenditures. The Credit Agreement also requires us to satisfy certain financial covenants, including a minimum interest coverage ratio of 3.00 to 1.00. At December 31, 2020, our interest coverage ratio was 9.07 to 1.00. The Credit Agreement also requires us to maintain a consolidated total leverage ratio not to exceed 3.25 to 1.00, although such leverage ratio can be increased in connection with certain acquisitions. This ratio was increased through the Second Amendment to the Credit Agreement to 4.25 to 1.00 for this quarter, as discussed in more detail below. At December 31, 2020, our consolidated total leverage ratio was 1.46 to 1.00.

The Credit Agreement includes customary events of default, including, among other things, payment default, covenant default, breach of representation or warranty, bankruptcy, cross-default, material ERISA events, material money judgments, and failure to maintain subsidiary guarantees. If an event of default occurs, the Agent will be entitled to take various actions, including the acceleration of amounts due under the Credit Agreement, termination of the credit facility, and all other actions permitted to be taken by a secured creditor.

On June 30, 2020, the Company entered into an amendment (Second Amendment) to the Credit Agreement. The Second Amendment provides the Company with temporary relief regarding a financial covenant (the consolidated total leverage ratio) for the period from June 30, 2020, through December 31, 2021, or such earlier date as the Company may elect (Covenant Relief Period), in return for certain increases in interest rates and fees and restrictions on certain activities of the Company, including capital expenditures, acquisitions, dividends and share repurchases. New pricing, which takes effect for the quarters ended on and after September 30, 2020, includes interest at a fluctuating LIBOR (at a floor of 75 basis points), plus 1.00% to 2.75%, along with the commitment fee ranging from 20 to 50 basis points.

During the Covenant Relief Period, the required ceiling on the Company’s consolidated total leverage ratio will be 4.25 to 1.00 for quarters ending June 30, 2020 through and including December 31, 2020 and will decline in quarterly increments to 3.25 to 1.00 for the quarter ending December 31, 2021.

~~As of December 31, 2020, our consolidated total leverage ratio was 1.46 to 1.00 in accordance with the Second Amendment of the Credit Agreement.~~

~~At December 31, 2020, we were in compliance with all covenants under the Credit Agreement and Second Amendment.~~

During the twelve months ended December 31, 2020 and 2019, our capital expenditures were $7,794 and $25,797, respectively. The decrease of $18,003 was driven by shifts in focuses from investments in new technology and automation in 2019 to leveraging those investments and controlling spend in 2020.

We have historically relied upon cash available through credit facilities, in addition to cash from operations, to finance our working capital requirements and to support our growth. At December 31, 2020, we had immediate availability of $154,743 through our Revolving Loan and another $100,000 through an accordion feature under our Credit Agreement, subject to covenants under the Credit Agreement and Second Amendment. We regularly monitor potential capital sources, including equity and debt financings, in an effort to meet our planned capital expenditures and liquidity requirements. Our future success will be highly dependent on our ability to access outside sources of capital. We will continue to have access to the availability currently provided under the Credit Agreement as long as we remain compliant with the financial covenants. Based on our estimates of the impact of COVID-19 at this time, we expect to be in compliance with these financial covenants through 2021 and the foreseeable future.

We believe that our operating cash flow and available borrowings under the Credit Agreement are sufficient to fund our operations for 2021 when taking into consideration the estimated impacts of COVID-19 based on the information we have available at this time. However, future cash flows are subject to a number of variables, and additional capital expenditures will be required to conduct our operations. There can be no assurance that operations and other capital resources will provide cash in sufficient amounts to maintain planned or future levels of capital expenditures. In the event we make one or more acquisitions and the amount of capital required is greater than the amount we have available for acquisitions at that time, we could be required to reduce the expected level of

~~capital expenditures and/or seek additional capital. If we seek additional capital, we may do so through borrowings under the Credit Agreement, joint ventures, asset sales, offerings of~~ debt or equity securities or other means. We cannot guarantee that this additional capital will be available on acceptable terms or at all. If we are unable to obtain the funds we need, we may not be able to complete acquisitions that may be favorable to us or finance the capital expenditures necessary to conduct our operations.

~~The following table presents our obligations and commitments to make future payments under contracts and contingent commitments at December 31, 2020:~~

We are exposed to market risk from changes in customer forecasts, interest rates, inflation, and, to a lesser extent, commodities. To reduce such risks, we selectively use financial instruments and other proactive management techniques.

The use and consumption of our components, products and services fluctuates depending on order forecasts we receive from our customers. These order forecasts can change dramatically from quarter to quarter dependent upon the respective markets that our customers provide products.

We are exposed to interest rate risk on certain of our short- and long-term debt obligations used to finance our operations and acquisitions. We have LIBOR-based floating rate borrowings under the Credit Agreement, which exposes us to variability in interest payments due to changes in the reference interest rates.

The amount borrowed under the Revolver Loan under the Credit Agreement was $45.3 million as of December 31, 2020. The interest rate was 2.50% as of December 31, 2020. Please see “Liquidity and Capital Resources – Amended and Restated Credit Agreement” in Part II, Item 7 of this Annual Report onoriginal Form 10-K and, ~~Note 4 in~~other than the ~~Notes to the Consolidated Financial Statements for more specifics.~~

A hypothetical 100-basis-point increase in our borrowing rates would have resulted in an additional $0.6 million of interest expense based on our variable rate debt at December 31, 2020. We do not use derivative financial instruments to manage interest risk or to speculate on future changes in interest rates. A rise in interest rates could negatively affect our cash flow.

We source a wide variety of materials and components from a network of suppliers. While such materials are generally available from numerous suppliers, COVID-19 has resulted in availability delays at times. In addition, commodity raw materials, such as steel, aluminum, copper, paint and paint chemicals, and other production costs are subject to price fluctuations, which could have a negative impact on our results. We strive to pass along such commodity price increases to customers to avoid profit margin erosion and in many cases utilize contracts with those customers to mitigate the impact of commodity raw material price fluctuations. As of December 31, 2020, we did not have any commodity hedging instruments in place.

~~To the shareholders and the Board of Directors of Mayville Engineering Company, Inc.~~

We have audited the accompanying consolidated balance sheets of Mayville Engineering Company, Inc. and subsidiaries (the "Company") as of December 31, 2020 and 2019, the related consolidated statements of comprehensive income (loss), shareholders’ equity, and cash flows, for eachfiling of the ~~three years in~~corrected certifications mentioned above, does not modify or update the period ended December 31, 2020, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2020 and 2019 and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2020, in conformity with accounting principles generally accepted in the United States of America.

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.original Form 10-K in any way.

December 31,
2020

December 31,
2019

ASSETS

Cash and cash equivalents

$
121

$
1

Receivables, net of allowances for doubtful accounts of $1,298 as of December 31, 2020
   and $526 as of December 31, 2019

42,080

40,188

Inventories, net

41,366

45,692

Tooling in progress

3,126

1,589

Prepaid expenses and other current assets

2,555

3,007

Total current assets

89,248

90,477

Property, plant and equipment, net

106,688

125,063

Assets held for sale

3,552

—

Goodwill

71,535

71,535

Intangible assets-net

61,467

72,173

Capital lease, net

2,581

3,227

Other long-term assets

3,462

1,107

Total

338,533

363,582

LIABILITIES, TEMPORARY EQUITY, AND SHAREHOLDERS’ EQUITY

Accounts payable

33,495

32,173

Current portion of capital lease obligation

626

598

Accrued liabilities:

Salaries, wages, and payroll taxes

10,190

5,752

Profit sharing and bonus

3,089

6,229

Other current liabilities

5,340

3,439

Total current liabilities

52,740

48,191

Bank revolving credit notes

45,257

72,572

Capital lease obligation, less current maturities

2,061

2,687

Deferred compensation and long-term incentive, less current portion

25,631

24,949

Deferred income tax liability

11,887

14,188

Other long-term liabilities

100

100

Total liabilities

137,676

162,687

Commitments and contingencies (see Note 10)

Common shares, no par value, 75,000,000 authorized, 21,093,035 shares issued at
   December 31, 2020 and 20,845,693 at December 31, 2019

—

—

Additional paid-in-capital

190,793

183,687

Retained earnings

14,998

22,090

Treasury shares at cost, 1,033,645 shares at December 31, 2020 and 1,213,482 at
   December 31, 2019

(4,934
)

(4,882
)
Total shareholders’ equity

200,857

200,895

Total

$
338,533

$
363,582

~~The accompanying notes are an integral part of these Consolidated Financial Statements.~~

Twelve Months Ended
December 31,

2020

2019

2018

Net sales

$
357,606

$
519,704

$
354,526

Cost of sales

326,105

460,986

303,948

Amortization of intangibles

10,706

10,706

4,096

Profit sharing, bonuses, and deferred compensation

8,250

25,105

8,058

Employee stock ownership plan expense

—

5,453

4,000

Other selling, general and administrative expenses

19,043

25,466

12,276

Contingent consideration revaluation

—

(6,054
)

(21
)
Income (loss) from operations

(6,498
)

(1,958
)

22,169

Interest expense

(2,668
)

(6,728
)

(3,879
)
Loss on extinguishment of debt

—

(154
)

(814
)
Income (loss) before taxes

(9,166
)

(8,840
)

17,476

Income tax benefit

(2,074
)

(4,088
)

(459
)
Net income (loss) and comprehensive income (loss)

$
(7,092
)

$
(4,753
)

$
17,935

Earnings (loss) per share

Net income (loss) available to shareholders

$
(7,092
)

$
(4,753
)

$
17,935

Basic and diluted earnings (loss) per share

$
(0.36
)

$
(0.27
)

$
1.29

Basic and diluted weighted average shares outstanding

19,898,122

17,447,464

13,891,301

Tax-adjusted pro forma information

Net income (loss) available to shareholders

$
(7,092
)

$
(4,753
)

$
17,935

Pro forma provision for income taxes

—

173

4,663

Pro forma net income (loss)

$
(7,092
)

$
(4,926
)

$
13,272

Pro forma basic and diluted earnings (loss) per share

$
(0.36
)

$
(0.28
)

$
0.96

Basic and diluted weighted average shares outstanding

19,898,122

17,447,464

13,891,301

Weighted average shares give effect to the issuance of a stock dividend of approximately 1,334.34-for-1 related to the Company’s initial public offering of common stock (IPO), as if the IPO occurred at the beginning of 2018.

~~Tax adjusted pro forma amounts reflect income tax adjustments as if the Company was a taxable entity as of the beginning of 2018 using a 26% effective tax rate.~~

~~The accompanying notes are an integral part of these Consolidated Financial Statements.~~

Twelve Months Ended
December 31,

2020

2019

2018

CASH FLOWS FROM OPERATING ACTIVITIES

Net income (loss)

$
(7,092
)

$
(4,753
)

$
17,935

Adjustments to reconcile net income to net cash used in operating activities:

Depreciation

21,383

22,296

16,372

Amortization

10,706

10,706

4,096

Allowance for doubtful accounts

772

284

(48
)
Inventory excess and obsolescence reserve

80

(60
)

90

Stock-based compensation expense

4,732

3,486

—

Costs recognized on step-up of acquired inventory

—

395

583

Contingent consideration revaluation

—

(6,054
)

(21
)
Loss (gain) on disposal of property, plant and equipment

667

(62
)

(177
)
Deferred compensation and long-term incentive

682

11,598

4,466

Loss (gain) on extinguishment or forgiveness of debt

—

(367
)

814

Non-cash adjustments

358

(237
)

128

Changes in operating assets and liabilities – net of effects of acquisition:

Accounts receivable

(2,664
)

11,853

1,042

Inventories

4,246

8,886

(6,873
)
Tooling in progress

(1,537
)

729

489

Prepaids and other current assets

500

(1,358
)

(4,425
)
Accounts payable

515

(11,010
)

834

Deferred income taxes

(4,857
)

(5,992
)

—

Accrued liabilities, excluding long-term incentive

8,032

(6,938
)

1,410

Net cash provided by operating activities

36,523

33,402

36,715

CASH FLOWS FROM INVESTING ACTIVITIES

Purchase of property, plant and equipment

(7,794
)

(25,797
)

(17,879
)
Proceeds from sale of property, plant and equipment

2,020

76

10

Acquisitions, net of cash acquired

—

(2,369
)

(114,700
)
Net cash used in investing activities

(5,774
)

(28,090
)

(132,569
)
CASH FLOWS FROM FINANCING ACTIVITIES

Proceeds from bank revolving credit notes

267,169

442,154

257,428

Payments on bank revolving credit notes

(294,484
)

(429,211
)

(228,137
)
Proceeds from issuance of other long-term debt

—

—

167,094

Repayments of other long-term debt

—

(120,046
)

(87,389
)
Deferred financing costs

(207
)

—

(2,173
)
Proceeds from IPO, net

—

101,763

—

Purchase of treasury stock

(2,509
)

(2,591
)

(7,833
)
Payments on capital leases

(598
)

(469
)

(123
)
Net cash provided by (used in) financing activities

(30,629
)

(8,400
)

98,867

Net increase (decrease) in cash and cash equivalents

120

(3,088
)

3,013

Cash and cash equivalents, beginning of year

1

3,089

76

Cash and cash equivalents, end of year

$
121

$
1

$
3,089

Supplemental disclosure of cash flow information:

Cash paid for interest

$
3,011

$
6,629

$
4,117

Cash paid for taxes

$
744

$
544

$
54

In conjunction with the DMP acquisition, fair value of assets acquired
and liabilities assumed were as followed: ⁽¹⁾

Fair value of assets acquired, net of cash acquired

$
—

$
—

$
167,781

Liabilities assumed

—

—

(53,081
)
Cash paid for acquisition, net of cash acquired

$
—

$
—

$
114,700

Non-cash construction in progress in accounts payable

$
1,559

$
2,809

$
1,240

~~The accompanying notes are an integral part of these Consolidated Financial Statements.~~

Shareholder’s Equity

Additional
Paid-in-Capital

Treasury
Shares

Retained
Earnings

Total

Balance as of December 31, 2017

$
—

$
—

$
—

$
—

Balance as of December 31, 2018

$
—

$
—

$
—

$
—

Transfer from temporary equity (see Note 17)

133,806

(57,659
)

29,698

105,845

Share issuance – IPO

101,763

—

—

101,763

Cancellation of treasury stock

(55,369
)

55,369

—

—

Share repurchases

—

(2,592
)

—

(2,592
)
Stock-based compensation

3,486

—

—

3,486

Net loss post IPO

—

—

(7,609
)

(7,609
)
Balance as of December 31, 2019

$
183,687

$
(4,882
)

$
22,089

$
200,895

Net loss

—

—

(7,092
)

(7,092
)
Share repurchases

—

(2,509
)

—

(2,509
)
ESOP contribution

2,374

2,457

—

4,831

Stock based compensation expense

4,732

—

—

4,732

Balance as of December 31, 2020

$
190,793

$
(4,934
)

$
14,998

$
200,857

~~The accompanying notes are an integral part of these Consolidated Financial Statements.~~

Mayville Engineering Company, Inc. and subsidiaries (MEC, the Company, we, our, us or similar terms) is a leading U.S.-based value-added manufacturing partner that provides a broad range of prototyping and tooling, production fabrication, coating, assembly and aftermarket components. Our customers operate in diverse end markets, including heavy- and medium-duty commercial vehicle, construction & access equipment, powersports, agriculture, military and other end markets. Founded in 1945 and headquartered in Mayville, Wisconsin, we are a leading Tier I U.S. supplier of highly engineered components to original equipment manufacturers (OEM) customers with leading positions in their respective markets. The Company operates 19 facilities located in Arkansas, Michigan, Mississippi, Ohio, Pennsylvania, Virginia, and Wisconsin. Our engineering expertise and technical know-how allow us to add value through every product redevelopment cycle (generally every three to five years for our customers).

In December 1985, the Company formed the Mayville Engineering Company, Inc. Employee Stock Ownership Plan (ESOP). The ESOP is a tax qualified retirement plan and is designed to invest primarily in the Company’s common stock which is held in a Trust. From January 2003 until the Company’s IPO in May 2019, the ESOP owned 100% of the Company’s outstanding shares of common stock which have been fully allocated to active or retired eligible employees. In connection with the IPO, the Company initially sold 6,250,000 shares of common stock into the public market, reducing ESOP ownership to approximately 67%. As of December 31, 2020, 55.2% of all outstanding shares were held by the ESOP or within the Company’s 401(k) plan.

The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP). They include the accounts of the Company and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.

The preparation of consolidated financial statements in conformity with GAAP requires management to make certain estimates and assumptions that affect the reported amounts and disclosures. Accordingly, actual results could differ from those estimates.

~~The Company considers all highly-liquid investments purchased with original maturities of 90 days or less to be cash and cash equivalents.~~

Financial instruments that potentially subject the Company to credit risk consist principally of bank balances above the Federal Deposit Insurance Corporation (FDIC) insurability limits of $250 per official custodian. The Company has not experienced any losses on these accounts and management believes the Company is not exposed to any significant credit risk on cash.

Accounts receivable are generally uncollateralized customer obligations due under normal trade terms requiring payment within 30 to 60 days from the invoice date. Management periodically reviews past due balances and established an allowance for doubtful accounts of approximately $1,298 and $526 as of December 31, 2020 and 2019, respectively, for probable uncollectible amounts based on its assessment of the current status of individual accounts. The estimated valuation allowance results in a charge to cost of sales and the accounts are written-off through a charge to the valuation allowance and a credit to accounts receivable after the Company has used all reasonable collection efforts.

Inventories are stated at the lower of cost, determined on the first-in, first-out method (FIFO), and net realizable value. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. Work-in-process and finished goods are valued at production cost consisting of material, labor and overhead. The Company maintains a reserve for obsolete and slow-moving inventory of approximately $3,199 and $3,119 as of December 31, 2020 and 2019, respectively, which is based upon the aging of current inventory as well as assumptions on future demand and market conditions.

The Company has agreements with its customers to provide production tooling which will be used to produce specific parts for its customers. The costs to design, engineer, and manufacture the tooling are charged to tooling in progress as incurred and based on when control of the tooling is promised under contract, is transferred to the customer either at a point in time or over a period of time is when revenue is recognized. The Company may also provide production tooling that is not sold to customers but is capitalized in

property, plant and equipment. To the extent that estimated costs exceed expected reimbursement from the customer, the Company recognizes a loss. Tooling in progress was $3,126 and $1,589 as of December 31, 2020 and 2019, respectively.

Property, plant and equipment are stated at cost. Expenditures for additions and improvements are capitalized while replacements, maintenance and repairs which do not improve or extend the lives of the respective assets are expensed as incurred. Properties sold, or otherwise disposed of, are removed from the property accounts, with gains or losses on disposal credited or charged to the results of operations. Depreciation is provided over the estimated useful lives of the respective assets, using the straight-line depreciation method for financial reporting purposes and begins when the asset is placed into service. Depreciation expense for the twelve months ended December 31, 2020, 2019 and 2018 was $21,383, $22,296 and $16,372, respectively, and is included in cost of sales on the Consolidated Statements of Comprehensive Income (Loss).

The Company accounts for all business combinations in accordance with Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Topic 805, “Business Combinations”. In connection with a business combination, the acquiring company must allocate the cost of the acquisition to assets acquired and liabilities assumed based on fair values as of the acquisition date. Any excess or shortage of amounts assigned to assets and liabilities over or under the purchase price is recorded as a gain on bargain purchase or goodwill. Transaction costs associated with acquisitions are expensed as incurred within selling, general and administrative expenses.

We test goodwill for impairment annually, or more frequently if triggering events occur indicating that there may be an impairment. We have recorded goodwill and perform testing for potential goodwill impairment at a reporting unit level. A reporting unit is an operating segment, or a business unit one level below an operating segment for which discrete financial information is available, and for which management regularly reviews the operating results. Additionally, components within an operating segment can be aggregated as a single reporting unit if they have similar economic characteristics. We have performed testing on our one reporting unit.

We test our goodwill for impairment on an annual basis in the fourth quarter of each fiscal year, and more frequently if events or changes in circumstances indicate that it might be impaired. Due to the economic conditions during the second quarter of 2020 as a result of the COVID-19 pandemic, we determined that an impairment triggering event occurred, which required an interim quantitative impairment assessment of goodwill. Based on our interim quantitative assessments, the fair value of our reporting unit exceeded our related carrying value by more than 50%, thus no impairment of goodwill was indicated. We also performed our annual qualitative goodwill impairment test during the fourth quarter of fiscal 2020, consistent with the timing of 2019. At December 31, 2020, the Company had goodwill with a carrying amount of $71,535. The fair value substantially exceeded the carrying value for 2020.

If the market valuation of our common shares or operating results of our reporting unit significantly decline beyond current levels, we may again need to conduct an evaluation of the fair value of our goodwill, which may result in an impairment change.

Changes to management assumptions and estimates utilized in the income and market approaches could negatively impact the fair value conclusions for our reporting units resulting in goodwill impairment. All key assumptions and valuations are determined by and are the responsibility of management. The factors used in the impairment analysis are inherently subject to uncertainty. We believe that the estimates and assumptions are reasonable to determine the fair value of our reporting units, however, if actual results are not consistent with these estimates and assumptions, goodwill and other intangible assets may be overstated which could trigger an impairment charge.

Financial instruments consist of cash and cash equivalents, accounts receivable, accounts payable and long-term debt. The carrying amount of all significant financial instruments approximates fair value due to either the short maturity or the existence of

variable interest rates that approximate prevailing market rates. Cash and cash equivalents, accounts receivable and accounts payable are classified as Level 1 fair value inputs as further described in Note 15. Long-term debt is classified as a Level 2 fair value input.

When events or conditions warrant, the Company evaluates the recoverability of long-lived assets and considers whether these assets are impaired. The Company assesses the recoverability of these assets based on several factors, including management’s intention with respect to these assets and their projected undiscounted cash flows. If projected undiscounted cash flows are less than the carrying amount of the respective assets, the Company adjusts the carrying amounts of such assets to their estimated fair value. To the extent that the carrying value of the net assets of a reportable unit is greater than the estimated fair value, the Company may be required to record impairment charges.

Loan issuance costs and discounts are capitalized upon the issuance of long-term debt and amortized over the life of the related debt and are presented as a reduction of the associated long-term debt on the Consolidated Balance Sheets. Loan issuance costs associated with revolving debt arrangements are presented as a component of other assets. Loan issuance costs incurred in connection with revolving debt arrangements are amortized using the straight-line method over the life of the credit agreement. Loan issuance costs and discounts incurred in connection with term debt are amortized using the effective interest method. Amortization of deferred loan issuance costs and discounts are included in interest expense. During 2020, 2019 and 2018, the Company recorded $207, $142 and $2,173, respectively of deferred financing costs associated with its long-term debt and line of credit arrangements. Amortization expense associated with the deferred debt issuance costs and discounts in 2020, 2019 and 2018 was approximately $358, $381 and $198. Accumulated amortization was approximately $616, $474 and $114 as of December 31, 2020, 2019 and 2018, respectively. Amendments made to existing debt in 2020, 2019 and 2018 resulted in the write-offs of $zero, $154 and $814, respectively of unamortized costs associated with the debt that was replaced.

The Company adopted ASC 606 January 1, 2019, where the Company recognizes revenue for the transfer of goods or services to a customer in an amount that reflects the consideration it expects to receive in exchange for those goods or services. When goods are shipped, the customer takes ownership at shipment, and this is when control transfers. Sales are supported by documentation such as supply agreements and purchase order, which specify certain terms and conditions including product specifications, quantities, fixed prices, delivery dates and payments terms. Revenue related to services is recognized in the period services are performed, thus the Company recognizes revenue at a point in time.

The Company offers certain customers discounts for early payments. These discounts are recorded against net sales in the consolidated statement of comprehensive income and accounts receivable in the Consolidated Balance Sheets. The Company does not offer any other customer incentives, rebates or allowances.

The Company expenses shipping and handling costs as incurred. These costs are generally comprised of salaries and wages, shipping supplies and warehouse costs. Inbound freight costs, which mostly relate to raw materials, are included in cost of sales on the Consolidated Statements of Comprehensive Income (Loss). Outbound freight costs, which mostly relate to sales, are included in net sales on the Consolidated Statements of Comprehensive Income (Loss). The Company does not charge customers nor recognize revenue for shipping and handling. The Company’s OEM customers arrange and pay the freight for delivery.

The Company expenses the costs of advertising when incurred. Advertising expense was approximately $100, $110 and $116 for the twelve months ended December 31, 2020, 2019 and 2018, respectively. Advertising costs are charged to selling, general and administrative expenses.

Income taxes and uncertain tax positions are accounted for in accordance with ASC 740, “Accounting for Income Taxes”. Deferred income taxes are provided for the differences between the bases of assets and liabilities for financial reporting and income tax purposes. The Company measures deferred tax assets and liabilities using enacted tax rates in effect for the years in which the differences are expected to reverse and recognizes the effect of a change in enacted rates in the period of enactment. Tax positions meeting the more-likely-than-not recognition threshold are measured pursuant to the guidance set forth in ASC 740. A valuation

allowance is established when necessary to reduce deferred tax assets to the amount expected to be realized. See Note 9 “Income Taxes” of these Notes to Consolidated Financial Statements for further discussion.

The Company computes basic earnings (loss) per share by dividing net income (loss) available to shareholders by the actual weighted average number of common shares outstanding for the reporting period. The dilutive impact to basic earnings per share considers the impact to earnings if all convertible securities were exercised or outstanding that do not have an antidilutive impact on earnings per share.

Treasury stock purchases are accounted for under the cost method whereby the entire cost of the acquired stock is recorded as treasury stock. Subsequent reissuance of shares to the ESOP are recorded as a reduction to treasury stock and as ESOP expense in the Consolidated Statements of Comprehensive Income (Loss).

~~In May 2014, FASB issued Accounting Standard Update (ASU) 2014-09,~~ ~~Revenue from Contracts with Customers~~ ~~(ASU 2014-09), and issued subsequent amendments to the initial guidance within ASU 2016-08,~~ ~~Revenue from Contracts with Customers~~, ~~Principal versus Agent Considerations~~ ~~(ASU 2016-08) issued in March 2016, ASU 2016-10, Revenue from Contracts with Customers, Identifying Performance Obligations and Licensing~~ ~~(ASU 2016-10) issued in April 2016, ASU 2016-12,~~ ~~Revenue from Contracts with Customers, Narrow-Scope Improvements and Practical Expedients~~ ~~(ASU 2016-12) issued in May 2016 and ASU 2016-20,~~ ~~Technical Corrections and Improvements~~ to Topic 606, Revenue from Contracts with Customers (ASU 2016-20) issued in December 2016 (ASU 2014-09, ASU 2016-08, ASU 2016-10, ASU 2016-12 and ASU 2016-20 collectively “Topic 606”). Topic 606 provides a comprehensive revenue recognition model requiring companies to recognize revenue for the transfer of goods or services to a customer in an amount that reflects the consideration it expects to receive in exchange for those goods or services. The guidance also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts. In July 2015, the FASB voted to defer the effective date of ASU 2014-09 by one year, and therefore the standard is effective for the Company's annual and interim periods beginning after December 15, 2019. Effective January 1, 2019, the Company implemented the new standard using a five-step model specified in the guidance using the modified retrospective method. The implementation did not have a material impact on the consolidated financial statements and there was no adjustment to retained earnings from implementation.

~~In February 2016, the FASB issued ASU 2016-02,~~ ~~Leases~~, creating Topic 842, which requires lessees to record the assets and liabilities arising from all leases in the statement of financial position. Under ASU 2016-02, lessees will recognize a liability for lease payments and a right-of-use asset. When measuring assets and liabilities, a lessee should include amounts related to option terms, such as the option of extending or terminating the lease or purchasing the underlying asset, that are reasonably certain to be exercised. For leases with a term of 12 months or less, lessees are permitted to make an accounting policy election to not recognize lease assets and liabilities. This guidance retains the distinction between finance leases and operating leases and the classification criteria remains similar to existing guidance. For financing leases, a lessee will recognize the interest on a lease liability separate from amortization of the right-of-use asset. In addition, repayments of principal will be presented within financing activities, and interest payments will be presented within operating activities in the statement of cash flows. For operating leases, a lessee will recognize a single lease cost on a straight-line basis and classify all cash payments within operating activities in the statement of cash flows. For public companies, this guidance will be effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. For as long as the Company remains an emerging growth company (EGC), the new guidance is effective for annual reporting periods beginning after December 15, 2021, and interim periods within fiscal years beginning after December 15, 2022. Early adoption is permitted. The Company is evaluating the potential impact of this guidance on the consolidated financial statements.

~~In June 2016, the FASB issued ASU No. 2016-13,~~ ~~Measurement of Credit Losses on Financial Instruments~~, which establishes ASC 326, Financial Instruments – Credit Losses. The ASU revises the measurement of credit losses for financial assets measured at amortized cost from an incurred loss methodology to an expected loss methodology. The ASU affects trade receivables, debt securities, net investment in leases, and most other financial assets that represent a right to receive cash. Additional disclosures about significant estimates and credit quality are also required. In November 2018, the FASB issued ASU No. 2018-19, Codification Improvements to Topic 326, Financial Instruments – Credit Losses. This ASU clarifies that receivables from operating leases are accounted for using the lease guidance and not as financial instruments. In May 2019, the FASB issued ASU No. 2019-05, Targeted Transition Relief, which amends ASC 326. This ASU provides an option to irrevocably elect to measure certain individual financial assets at fair value instead of amortized cost. In November 2019, the FASB issued ASU No. 2019-11, Codification Improvements to Topic 326, Financial Instruments – Credit Losses. The ASU clarifies the treatment of expected recoveries for amounts previously written off on purchased receivables, provides transition relief for troubled debt restructuring, and allows for certain disclosure simplifications of accrued interest. For as long as the Company remains an EGC, the new guidance is effective for annual reporting periods beginning after December 15, 2022. The Company is evaluating the potential effects on the consolidated financial statements.

~~In January 2017, the FASB issued ASU 2017-01,~~ ~~Clarifying the Definition of a Business, which narrows the application of when an integrated set of assets and activities is considered a business and provides a framework to assist entities in evaluating whether both~~

an input and a substantive process are present to be considered a business. It is expected that the new guidance will reduce the number of transactions that would need to be further evaluated and accounted for as a business. For public companies, this guidance is effective for annual reporting periods beginning after December 15, 2017, including interim periods within those fiscal years. For as long as the Company remains an EGC, the new guidance is effective for annual reporting periods beginning after December 15, 2018 and interim periods within annual periods beginning after December 15, 2019. Early adoption is permitted. The adoption had no impact on the financial statements.

~~In January 2017, the FASB issued ASU, 2017-04,~~ ~~Simplifying the Test for Goodwill Impairment~~, which simplifies the subsequent measurement of goodwill by removing the requirement to perform a hypothetical purchase price allocation to compute the implied fair value of goodwill to measure impairment. Instead, any goodwill impairment will equal the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. Further, the guidance eliminates the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. For public companies, this guidance is effective for annual or any interim goodwill impairment test in annual reporting periods beginning after December 15, 2018. For as long as the Company remains an EGC, the new guidance is effective for any annual or interim goodwill impairment test in annual reporting periods beginning after December 15, 2021. During the period ended March 31, 2020, the Company elected to early adopt this guidance. This adoption had no impact on the financial statements.

~~In August 2018, the FASB issued ASU 2018-13,~~ ~~Fair Value Measurement~~ (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement (ASU 2018-13) to improve the effectiveness of fair value measurement disclosures. The amendments in this Update modify the disclosure requirements on fair value measurements in Topic 820, Fair Value Measurement based on the concepts in FASB Concept Statement, including the consideration of costs and benefits. The amendments in this Update are effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption of this guidance is permitted for removed or modified disclosures upon issuance of this Update while a delayed adoption of the additional disclosures is allowed until the effective date. During the period ended March 31, 2020, the Company elected to adopt this guidance. The adoption had no impact on the financial statements.

~~In December 2019, the FASB issued ASU 2019-12,~~ ~~Income Taxes~~, creating Topic 740, which removes certain exceptions for recognizing deferred taxes for investments, performing intra-period allocation, and calculating income taxes in interim periods. The ASU also adds guidance to reduce complexity in certain areas, including recognizing deferred taxes for tax goodwill and allocating taxes to members of a consolidated group. For public companies, this guidance will be effective for fiscal years beginning after December 15, 2020. For as long as the Company remains an EGC, the new guidance is effective for annual reporting periods beginning after December 15, 2021, and interim periods within fiscal years beginning after December 15, 2022. Early adoption is permitted. The Company is evaluating the potential impact of this guidance on the consolidated financial statements.

The IPO of shares of the Company’s common stock was completed in May 2019. In connection with the offering, the Company initially sold 6,250,000 shares of common stock at $17 per share generating proceeds of $99,344, net of underwriting discounts and commissions. Additional shares were also sold under an option granted to the underwriters that same month, resulting in a sale of an additional 152,209 shares of common stock at $17 per share, generating additional proceeds of $2,419, net of underwriting discounts and commissions

In conjunction with the IPO, the Company issued a stock dividend specific to pre-IPO shares, of approximately 1,334.34-for-1, resulting in the conversion of 10,075 shares in our Employee Stock Ownership Plan to 13,443,484 shares.

~~Property, plant and equipment as of December 31, 2020 and December 31, 2019 consist of:~~

Additionally, the Company completed the closure of its Greenwood, SC manufacturing facility during the third quarter of the current period. The net amount of property, plant and equipment associated with the facility was $3,552, which is classified in assets held for sale on the Consolidated Balance Sheets as of December 31, 2020.

We test our goodwill for impairment on an annual basis in the fourth quarter of each fiscal year, and more frequently if events or changes in circumstances indicate that it might be impaired. Due to the economic conditions during the second quarter of 2020 as a result of the COVID-19 pandemic, we determined that an impairment triggering event occurred, which required an interim quantitative impairment assessment of goodwill. Based on our interim quantitative assessments, the fair value of our reporting unit exceeded our related carrying value by more than 50%, thus no impairment of goodwill was indicated. We also performed our annual qualitative goodwill impairment test during the fourth quarter of fiscal 2020, consistent with the timing of 2019. At December 31, 2020, the Company had goodwill with a carrying amount of $71,535. The fair value substantially exceeded the carrying value for 2020.

~~Changes in goodwill between December 31, 2019 and December 31, 2020 consist of:~~

~~The following is a listing of intangible assets, the useful lives in years (amortization period) and accumulated amortization as of December 31, 2020 and December 31, 2019:~~

~~Changes in intangible assets between December 31, 2019 and December 31, 2020 consist of:~~

~~Amortization expense was $10,706, $10,706 and $4,096 for the twelve months ended December 31, 2020, 2019 and 2018 respectively.~~

On September 26, 2019, and as last amended as of June 30, 2020, we entered into an amended and restated credit agreement (Credit Agreement) with certain lenders and Wells Fargo Bank, National Association, as administrative agent (the Agent). The Credit Agreement provides for a $200,000 revolving credit facility (the Revolving Loan), with a letter of credit sub-facility in an aggregate amount not to exceed $5,000, and a swingline facility in an aggregate amount of $20,000. The Credit Agreement also provides for an additional $100,000 of capacity through an accordion feature. All amounts borrowed under the Credit Agreement mature on September 26, 2024.

The Credit Agreement contains usual and customary negative covenants for agreements of this type, including, but not limited to, restrictions on our ability to, subject to certain exceptions, create, incur or assume indebtedness, create or incur liens, make certain investments, merge or consolidate with another entity, make certain asset dispositions, pay dividends or other distributions to shareholders, enter into transactions with affiliates, enter into sale leaseback transactions or make capital expenditures. The Credit Agreement also requires us to satisfy certain financial covenants, including a minimum interest coverage ratio of 3.00 to 1.00 as well as a consolidated total leverage ratio not to exceed 3.25 to 1.00, although such leverage ratio can be increased in connection with certain acquisitions.

In order to provide a means of insurance against future macroeconomic events, we entered into an amendment (Second Amendment) to the Credit Agreement on June 30, 2020. The Second Amendment provides the Company with temporary changes to the total leverage ratio covenant for the period from June 30, 2020, through December 31, 2021, or such earlier date as the Company may elect (Covenant Relief Period), in return for certain increases in interest rates, fees and restrictions on certain activities of the Company, including capital expenditures, acquisitions, dividends and share repurchases. New pricing, which takes effect for the quarters ending on and after September 30, 2020, includes interest at a fluctuating London Interbank Offered Rate (LIBOR) (at a floor of 75 basis points), plus 1.00% to 2.75%, along with the commitment fee ranging from 20 to 50 basis points.

During the Covenant Relief Period, the required ceiling on the Company’s total leverage ratio will be 4.25 to 1.00 for quarters ending June 30, 2020 through and including December 31, 2020, and will decline in quarterly increments to 3.25 to 1.00 through the quarter ending December 31, 2021.

~~At December 31, 2020, our consolidated total leverage ratio was 1.46 to 1.00 as compared to a covenant maximum of 4.25 to 1.00 in accordance with the Second Amendment of the Credit Agreement.~~

~~At December 31, 2020, our interest coverage ratio was 9.07 to 1.00 as compared to a covenant minimum of 3.00 to 1.00 under the Credit Agreement.~~

Under the Credit Agreement, interest is payable quarterly at the adjusted LIBOR plus an applicable margin based on the current funded indebtedness to adjusted EBITDA ratio. The interest rate was 2.50% and 3.25% as of December 31, 2020 and December 31, 2019, respectively. Additionally, the agreement has a fee on the average daily unused portion of the aggregate unused revolving commitments. This fee was 0.20% as of December 31, 2020 and December 31, 2019.

The Company was in compliance with all financial covenants of its credit agreements as of December 31, 2020 and December 31, 2019. The amount borrowed on the revolving credit notes was $45,257 and $72,572 as of December 31, 2020 and December 31, 2019, respectively.

Capital leases consist of equipment with a capitalized cost of $3,825 at December 31, 2020 and December 31, 2019, and accumulated depreciation of $1,245 and $598 at December 31, 2020 and December 31, 2019, respectively. Depreciation of $644 and $503 was recognized on the capital lease assets during the twelve months ended December 31, 2020 and December 31, 2019, respectively. Non-cash capital lease transactions amounted to zero, $1,776 and $2,051, for the twelve months ended December 31, 2020, 2019 and 2018, respectively. Future minimum lease payments required under the lease are as follows:

~~Operating leases relate to property, plant and equipment. Future minimum lease payments required under the lease are as follows:~~

The Company leases certain office space, warehousing facilities, equipment and vehicles under operating lease arrangements with third-party lessors. These lease arrangements expire at various times through December 2028. Total rent expense under the arrangements was approximately $4,471, $4,801 and $2,052 for the twelve months ended December 31, 2020, 2019, and 2018, respectively.

Under the ESOP, the Company can make annual contributions to the trust for the benefit of eligible employees in the form of cash or shares of common stock of the Company. Prior to December 31, 2019, the annual contribution was discretionary except that it must have been at least 3% of the compensation for all safe harbor participants for the plan year. Beginning on January 1, 2020, all contributions are discretionary. For the twelve months ended December 31, 2020, 2019 and 2018, the Company’s ESOP expense amounted to zero, $5,453 and $4,000, respectively.

At various times following death, disability, retirement, termination of employment or the exercise of diversification rights, an ESOP participant is entitled to receive their ESOP account balance in accordance with various distribution methods as permitted under the policies adopted by the ESOP. Prior to the IPO, all distributions were paid to participants in cash.

As of December 31, 2020, and December 31, 2019, the ESOP shares consisted of 9,920,774 and 11,790,113 in allocated shares, respectively. Prior to its IPO, the Company was obligated to repurchase shares in the trust that were not distributed to ESOP

~~participants as determined by the ESOP trustees, and thus the shares were mandatorily redeemable. Subsequent to the IPO, shares are sold in the public market.~~

The Mayville Engineering Company, Inc. 401(k) Plan (the 401(k) Plan) covers substantially all employees meeting certain eligibility requirements. The 401(k) Plan is a defined contribution plan and is intended for eligible employees to defer tax-free contributions to save for retirement. Employees may contribute up to 50% of their eligible compensation plan to the 401(k) Plan, subject to the limits of Section 401(k) of the Internal Revenue Code.

The 401(k) Plan also provides for employer discretionary profit sharing contributions and the Board of Directors authorized discretionary profit sharing contributions of approximately $1,833, zero and $696 for the twelve months ended December 31, 2020, 2019 and 2018, respectively, that are funded in the subsequent years.

~~Income taxes are included in the Consolidated Statements of Comprehensive Income (Loss) at December 31, 2020 and 2019 as below:~~

~~A reconciliation of the statutory federal income tax expense to the income tax expense from continuing operations provided at December 31, 2020 and 2019, is as follows:~~

December 31,
2020

December 31,
2019

Income tax expense at the federal statutory rate - 21%

$
(1,925
)

$
(1,854
)
State and local income taxes - net of federal income tax benefits

79

(58
)
Compensation deduction limitation - section 162(m) adjustment

(113
)

357

Income taxed by shareholder before IPO

(387
)

(867
)
Other - perms

51

77

Transaction costs

—

607

Change in tax status

—

(2,355
)
Tax credits generated

(409
)

(254
)
Uncertain tax positions - current year

106

—

Uncertain tax positions - prior year

115

—

Loan fee amortization

698

—

Stock compensation

764

—

Section 481(a) adjustments

(184
)

—

Fixed assets

(452
)

—

State tax return to provision

(121
)

—

Other miscellaneous tax

(296
)

259

Total income tax benefit

$
(2,074
)

$
(4,088
)
Effective tax rate

22.6
%

47.5
%

The Company’s two legacy businesses, MEC and DMP, filed separate returns prior to the IPO on May 9, 2019. Previous to this date, the MEC legacy business was an S Corporation where the tax burden was born by the shareholders and the DMP legacy business was a consolidated C-Corporation.

~~The tax effects of temporary differences that give rise to significant portions of the deferred income tax assets and liabilities are presented below:~~

December 31,
2020

December 31,
2019

Deferred tax assets:

Deferred compensation

$
8,295

$
8,645

Inventory adjustments

1,506

1,837

Accrued expenses

409

211

Credits

508

279

Net operating loss

2,626

3,120

Other

338

—

Total deferred tax assets

13,682

14,092

Deferred tax liabilities:

Property, plant and equipment

9,485

8,354

Intangibles

15,773

19,305

Inventory adjustment

—

—

Other

311

622

Total deferred tax liabilities

25,569

28,281

Valuation allowance

—

—

Net deferred tax liability

$
(11,887
)

$
(14,188
)

Consolidated federal net operating loss carryforwards are $11,833 and do not expire. In addition, the Company has consolidated and separate company net operating loss carryforwards of $2,042 in various states.

The Company has recorded a reserve of uncertain tax positions expected to be taken on its December 31, 2020 return as well as prior years. The Company does not anticipate that there will be a material change in the balance of the unrecognized tax benefits in the next twelve months. Any interest and penalties related to uncertain tax positions are recorded in income tax expense. No amounts have been recorded as tax expense for interest and penalties for the year ended December 31, 2020 as the amount for the utilized portion of the research and development credit on the Wisconsin return is considered to be immaterial. At December 31, 2020, a total of $208 of unrecognized tax benefits would, if recognized, impact the company's effective tax rate.

The Company files income tax returns in the United States federal jurisdiction and in various state and local jurisdictions. Federal tax returns for tax years beginning January 1, 2017, and state tax returns beginning January 1, 2016, are open for examination.

~~The following is a reconciliation of beginning and ending amounts of unrecognized tax benefits:~~

From time to time, the Company may be involved in various claims and lawsuits, both for and against the Company, arising in the normal course of business. Although the results of litigation and claims cannot be predicted with certainty, in management’s opinion, either the likelihood of loss is remote, or any reasonably possible loss associated with the resolution of such proceedings is not expected to have a material adverse impact on the consolidated financial statements.

The Mayville Engineering Deferred Compensation Plan is available for certain employees designated to be eligible to participate by the Company and approved by the Board of Directors. Eligible employees may elect to defer a portion of his or her compensation for any plan year and the deferral cannot exceed 50% of the participant’s base salary and may include the participant’s annual short-term cash incentive up to 100%. The participant’s election must be made prior to the first day of the plan year.

An employer contribution will be made for each participant to reflect the amount of any reduced allocations to the ESOP and/or 401(k) employer contributions due solely to the participant’s deferral amounts, as applicable. In addition, a discretionary amount may be awarded to a participant by the Company.

Prior to the IPO, all deferrals were deemed to have been invested in the Company’s common stock at a price equal to the share value on the date of deferral and the value of the account increased or decreased with the change in the value of the stock. Individual accounts are maintained for each participant. Each participant’s account is credited with the participant’s deferred compensation and investment income or loss, reduced for charges, if any.

~~For the period subsequent to the IPO, deferrals are assumed to be invested in an investment vehicle based on the options made available to the participant (which does not include Company stock).~~

The deferred compensation plan provides benefits payable upon separation of service or death. Payments are to be made 30 days after date of separation from service, either in a lump-sum payment or up to five annual installments as elected by the participant when the participant first elects to defer compensation.

The deferred compensation plan is non-funded, and all future contributions are unsecured in that the employees have the status of a general unsecured creditor of the Company and the agreements constitute a promise by the Company to make benefit payments in the future. During the twelve months ended December 31, 2020, 2019 and 2018, eligible employees elected to defer compensation of $63, $1,296 and $856, respectively. As of December 31, 2020, and December 31, 2019, the total amount accrued for all benefit years under this plan was $25,631 and $24,949, respectively, which is included within the deferred compensation and long-term incentive on the Consolidated Balance Sheets. These amounts include the initial deferral of compensation as adjusted for (a) subsequent changes in the share value of the Company stock pursuant to the IPO or (b) following the IPO in the investment options chosen by the participants. Total expense for the deferred compensation plan for the twelve months ended December 31, 2020, 2019 and 2018 amounted to $725, $10,476 and $1,647, respectively. These expenses are included in profit sharing, bonuses and deferred compensation on the Consolidated Statements of Comprehensive Income (Loss).

Prior to the IPO, the Company’s long-term incentive plan (LTIP) was available for any employee who had been designated to be eligible to participate by the Compensation Committee of the Board of Directors. Annually, the LTIP provided for long-term cash incentive awards to eligible participants based on the Company’s performance over a three-year performance period.

The LTIP was non-funded and each participant in the plan was considered a general unsecured creditor of the Company and each agreement constituted a promise by the Company to make benefit payments if the future conditions were met, or if discretion is exercised in favor of a benefit payment.

The qualifying conditions for each award granted under the plan included a minimum increase in the aggregate fair value of the Company of 12% during the three-year performance period and the eligible participants must have been employed by the Company on the date of the cash payment or have retired after attaining age 65, died or become disabled during the period from the beginning of the performance period to the date of payment. If the qualifying conditions were not attained, discretionary payments were made, up to a maximum amount specified in each award agreement. Discretionary payments were determined by the Compensation Committee of the Board of Directors (for payment to the Chief Executive Officer of the Company) and by the Chief Executive Officer (for payments to other participants in the plan).

If a participant was not employed throughout the performance period due to retirement, death or disability, their maximum benefit was prorated based on the number of days employed by the Company during the performance periods.

The LTIP was terminated in May 2019 in conjunction with the IPO. Total expense for the long-term incentive plan for the twelve months ended December 31, 2020, 2019 and 2018 amounted to zero, $10,000 and $1,712, respectively. These expenses are included in profit sharing, bonuses and deferred compensation on the Consolidated Statements of Comprehensive Income (Loss).

The Company is self-funded for the medical benefits provided to its employees and their dependents. Healthcare costs are expensed as incurred and are based upon actual claims paid, reinsurance premiums, administration fees, and estimated unpaid claims. As of March 31, 2020, the Company has consolidated benefit plans with no specific stop loss and an aggregate stop to limit risk. Expense related to this contract was approximately $20,849, $19,208 and $17,726 for the twelve months ended December 31, 2020, 2019 and 2018, respectively. An estimated accrued liability of approximately $1,721 and $1,316 was recorded as of December 31, 2020 and December 31, 2019, respectively, for estimated unpaid claims and is included within other current liabilities on the Consolidated Balance Sheets.

~~The Company applies the provisions of ASC Topic 280,~~ ~~Segment Reporting~~. An operating segment is defined as a component that engages in business activities whose operating results are reviewed by the chief operating decision maker and for which discrete financial information is available. Based on the provisions of ASC 280, the Company has determined it has one operating segment. The Company does not earn revenues or have long-lived assets located in foreign countries.

Fair value provides information on what the Company may realize if certain assets were sold or might pay to transfer certain liabilities based upon an exit price. Financial assets and liabilities that are measured and reported at fair value are classified into a three-level hierarchy that prioritizes the inputs used in the valuation process. A financial instrument’s categorization within the valuation hierarchy is based on the lowest level of any input that is significant to the fair value measurement. The hierarchy is based on the observability and objectivity of the pricing inputs, as follows:

~~The following table lists the Company’s financial assets and liabilities accounted for at fair value by the fair value hierarchy:~~

Fair value measurements for the Company’s cash and cash equivalents are classified based upon Level 1 measurements because such measurements are based upon quoted market prices in active markets for identical assets.

~~Accounts receivable, accounts payable, long-term debt and accrued liabilities are recorded in the financial statements at cost and approximate fair value.~~

Deferred compensation liabilities are recorded at amounts due to participants at the time of deferral. Deferrals are invested in an investment vehicle based on the options made available to the participant, considered to be Level 1 and Level 2 on the fair value hierarchy, with the majority of the balance as Level 2. The change in fair value is recorded in the profit sharing, bonuses, and deferred compensation line item on the Consolidated Statements of Comprehensive Income (Loss). The balance due to participants is reflected on the deferred compensation and long-term incentive line item on the Consolidated Balance Sheets.

The Company’s non-financial assets such as intangible assets and property, plant, and equipment are re-measured at fair value when there is an indication of impairment and adjusted only when an impairment charge is recognized.

The Company has contract assets and contract liabilities, which are included in other current assets and other current liabilities on the Consolidated Balance Sheet, respectively. Contract assets include products where the Company has satisfied its performance obligation, but receipt of payment is contingent upon delivery. Contract liabilities include deferred tooling revenue, where the performance obligation was not met. The performance obligation is satisfied when the tooling is completed and the customer signs off through the PPAP. Cost of goods sold is recognized and released from the balance sheet when control of the tooling promised under contract is transferred to the customer either at a point in time or over a period of time.

The Company’s contracts with customers are short-term in nature; therefore, revenue is typically recognized, billed and collected within a 12-month period. The following table reflects the changes in our contract assets and liabilities during the twelve months ended December 31, 2020.

~~The following table represents a disaggregation of revenue by product category:~~

Prior to our IPO in May 2019, our common stock was considered redeemable under GAAP because of certain repurchase obligations related to the ESOP. As a result, all common shares were recorded as temporary equity (redeemable common shares) on the Consolidated Balance Sheets at their redemption value as of the respective balance sheet dates.

All contractual redemption features were removed at the time of the IPO. As a consequence, all outstanding shares of common stock ceased to be considered temporary equity and were reclassified to Shareholders’ Equity, including the associated balances of retained earnings. As the common shares have no par value, the amounts recorded in temporary equity for the share redemption value were recorded to additional paid-in capital within Shareholders’ Equity upon the transfer.

~~The following table shows all changes to temporary equity during the period of January 1, 2018 through the IPO.~~

Temporary Equity

Redeemable
Common
Shares

Treasury
Shares

Retained
Earnings

Balance as of December 31, 2017

$
125,042

$
(49,826
)

$
17,671

Net income

—

—

17,936

Purchase of treasury shares

—

(11,833
)

—

Redistribution of stockholders share

—

4,000

—

Change in redemption value of outstanding redeemable common shares, net

8,764

—

(8,764
)
Balance as of December 31, 2018

133,806

(57,659
)

26,842

Net income pre-IPO

—

—

2,856

Transfer from temporary equity to common equity

(133,806
)

57,659

(29,698
)
Balance as of December 31, 2019

$
—

$
—

$
—

On May 13, 2019, the Company issued a stock dividend specific to pre-IPO shares, of approximately 1,334.34-for-1. The share dividend was accounted for as a 1,334.34-for-1 stock split and is retroactively reflected in these consolidated financial statements. All share redemption provisions were removed effective with the IPO.

~~As disclosed in Note 2,~~ ~~IPO, the Company’s IPO of common stock was effective in May 2019. In connection with the offering, the Company sold a total of 6,402,209 shares of additional shares of common stock.~~

~~On June 28, 2019, the Company cancelled 24,180,421 shares of common stock held in the Company’s treasury and returned those shares to the status of authorized but unissued shares of common stock.~~

~~The company computes earnings per share in accordance with ASC Topic 260, Earnings per Share~~. In accordance with ASC 260, outstanding options will be considered to have been exercised and outstanding as of the beginning of the period if the average market price of the common stock during the period exceeds the exercise price of the options (they are “in the money”), and the assumed exercise of the options do not have an anti-dilutive impact on earnings per share.

~~Options in the money that were not included in the computation of diluted earnings per share because they would have had antidilutive impact on earnings per share were as follows:~~

~~The following customers accounted for 10% or greater of the Company’s recorded net sales and net trade receivables:~~

Net Sales

Accounts Receivable

Twelve Months Ended December 31,

As of

As of

2020

2019

2018

December 31, 2020

December 31, 2019

Customer

A

15.3
%

15.1
%

22.6
%

11.3
%

<10
%
B

11.1
%

13.5
%

19.3
%

<10
%

<10
%
C

12.5
%

<10
%

17.4
%

12.2
%

<10
%
D

11.6
%

13.1
%

<10
%

<10
%

<10
%
E

<10
%

<10
%

<10
%

<10
%

13.5
%
F

<10
%

<10
%

<10
%

<10
%

10.4
%

~~The Mayville Engineering Company, Inc. 2019 Omnibus Incentive Plan allows the Company the ability to provide monetary payments based on the value of its common stock, up to two million shares.~~

~~The Company recognizes stock-based compensation using the fair value provisions prescribed by ASC Topic 718,~~ ~~Compensation – Stock Compensation~~. Accordingly, compensation costs for awards of stock-based compensation settled in shares are determined based on the fair value of the share-based instrument at the time of grant and are recognized as expense over the vesting period of the share-based instrument. For units, fair value is equivalent to the stock price at the date of grant. The Black-Scholes option pricing model is utilized to determine fair value for options.

Stock awards were granted on May 12, 2020, February 27, 2020, and May 8, 2019. There were no stock awards granted prior to this and as a result, there is no information included in the tables below for the year 2018.

~~The Company’s stock-based compensation expense by award type is summarized as follows:~~

~~IPO units were fully expensed during the twelve-month period ended December 31, 2020.~~

A rollforward of unrecognized stock-based compensation expense is displayed in the table below. Unrecognized stock-based compensation expense as of December 31, 2020 will be expensed over the remaining requisite service period from which individual award values relate, up to February 27, 2022.

Twelve Months Ended December 31,

2020

2019

Units

Options

Total

Units

Options

Total

Beginning balance

$
2,595

$
1,124

$
3,719

$
—

$
—

$
—

Grants

3,022

2,041

5,063

5,634

1,748

7,382

Forfeitures

(738
)

(335
)

(1,073
)

(88
)

(88
)

(176
)
Expense

(3,334
)

(1,398
)

(4,732
)

(2,951
)

(536
)

(3,487
)
Ending balance

$
1,545

$
1,432

$
2,977

$
2,595

$
1,124

$
3,719

As of December 31, 2020, there were 125,414 options issued and outstanding at an exercise price of $17.00 per share with a remaining contractual life of 8.5 years. The intrinsic value of these outstanding options was zero based on the Company’s stock price as of December 31, 2020.

The Company uses the Black-Scholes valuation model to estimate the fair value of stock options which were $2.84 and $6.07 for those options granted during the years ended December 31, 2020 and 2019, respectively. The Company utilized the following assumptions in determining these fair values:

The Company does not have historical option exercise data to estimate the expected term. For options granted in 2020, the Company began utilizing the simplified method prescribed by Staff Accounting Bulletin (SAB) ~~Topic 14~~ to estimate the expected term, which is calculated as the average of the vesting term and the contractual term. The 2020 option grants have a contractual life of 10 years and a requisite service period, or vesting term, of 2 years with 50% vesting on the annual anniversary dates. Applying the simplified method, the Company calculated the expected terms of each tranche to be 5.5 years and 6.0 years resulting in an average expected term of 5.75 years for these awards. The Company will continue to employ the simplified method until more relevant detailed information becomes available from which to make this estimate.

Based on the Company’s investments in new technology and automation, which have resulted in a smaller footprint requirement to maintain manufacturing capacity, the Company announced it would be closing its Greenwood, SC facility on May 6, 2020. The facility closure was finalized during the third quarter of 2020 with all customer components re-distributed amongst five other MEC manufacturing facilities. All customer relationships and manufactured components were maintained through this transition without disruption to our customers.

~~Costs associated with the closure are being accounted for in accordance with ASC 420~~ ~~Exit or Disposal Cost Obligations~~.

For the twelve months ended December 31, 2020, the Company incurred $2,524 of costs associated with the facility closure and restructuring, including $282 for severance and retention bonus, $931 for the loss on sale of manufacturing equipment not transferred to another MEC facility, $78 for the buyout of operating leases, $622 for the disposition of inventory, and the remainder mostly related to costs to close the facility and relocate equipment to other facilities. These costs were recognized on the cost of sales line item of the Condensed Consolidated Statements of Comprehensive Income (Loss).

~~The Greenwood facility has a net book value of approximately $3,552 as of December 31, 2020 and is classified as assets held for sale on the Consolidated Balance Sheet.~~

~~The following table summarizes the activity related to the Greenwood restructuring through December 31, 2020:~~

As a result of the Greenwood facility closure, future earnings and cash flows will no longer be impacted by the depreciation associated with the assets disposed of or the facility, maintenance costs of the facility, and facility personnel expenses.

Assets disposed of had a net book value of $2,475 with a remaining useful life of approximately 3 years resulting in approximately $825 of annual depreciation expense that will no longer be incurred. The facility has a net book value of $3,552 as of December 31, 2020 with a remaining weighted average useful life of approximately 27 years resulting in approximately $133 of annual depreciation expense that will no longer be incurred.

~~The Company incurred approximately $800 of annual facility maintenance costs, including utilities, that will no longer be incurred.~~

Total personnel costs associated with the facility were approximately $2,250 for the first quarter 2020 resulting in approximately $9,000 of annual personnel expenses, of which the majority of these costs will be transitioned to the other five MEC facilities that will now be manufacturing these components. As previously mentioned, all customer relationships and manufacturing programs were retained through the transition.

The aforementioned depreciation, maintenance costs, and personnel expenses associated with the Greenwood facility have been classified as cost of sales on the Condensed Consolidated Statements of Comprehensive Income (Loss).

The Company evaluated events and transactions for potential recognition or disclosure in the consolidated financial statements through March 5, 2021, the date on which the consolidated financial statements were available to be issued.

The following tables present our unaudited quarterly results of operations for the eight quarters in 2020 and 2019. This unaudited information has been prepared on the same basis as our audited consolidated financial statements and includes all adjustments, consisting only of normal recurring adjustments, that we consider necessary for fair statement of our consolidated financial position and operating results for the quarters presented. This unaudited information should be read in conjunction with the consolidated financial statements and related notes included in Part II, Item 8 of this Annual Report on Form 10-K. Our operating results for any quarter are not necessarily indicative of results for any future quarters or for a full year.

Q1

Q2

Q3

Q4

Full Year

2020

2020

2020

2020

2020

Net sales

$
108,605

$
62,582

$
91,075

$
95,344

$
357,606

Cost of sales

96,762

63,736

81,340

84,267

326,105

Amortization of intangibles

2,677

2,677

2,677

2,676

10,706

Profit sharing, bonuses, and deferred compensation

1,325

1,194

2,288

3,443

8,250

Employee Stock Ownership Plan expense

675

(675
)

—

—

—

Other selling, general and administrative expenses

5,599

4,552

4,490

4,402

19,043

Income (loss) from operations

1,567

(8,902
)

280

556

(6,498
)
Interest expense

(826
)

(637
)

(647
)

(558
)

(2,668
)
Income (loss) before taxes

741

(9,539
)

(367
)

(2
)

(9,166
)
Income tax expense (benefit)

691

(2,525
)

733

(973
)

(2,074
)
Net income (loss) and comprehensive income (loss)

$
50

$
(7,014
)

$
(1,100
)

$
971

$
(7,092
)
Earnings (loss) per share

Net income (loss) available to shareholders

$
50

$
(7,014
)

$
(1,100
)

$
971

$
(7,092
)
Basic and diluted earnings (loss) per share

$
0.00

$
(0.35
)

$
(0.05
)

$
0.05

$
(0.36
)
Basic and diluted weighted average shares outstanding

19,533,533

19,902,912

20,077,039

20,451,203

19,898,122

Q1

Q2

Q3

Q4

Full Year

2019

2019

2019

2019

2019

Net sales

$
143,732

$
145,130

$
128,511

$
102,331

$
519,704

Cost of sales

124,153

124,595

113,941

98,297

460,986

Amortization of intangibles

2,677

2,677

2,677

2,677

10,706

Profit sharing, bonuses, and deferred compensation

1,750

22,830

678

(153
)

25,105

Employee Stock Ownership Plan expense

1,500

1,500

1,500

953

5,453

Other selling, general and administrative expenses

6,723

7,506

6,068

5,170

25,466

Contingent consideration revaluation

869

2,674

(9,598
)

—

(6,054
)
Income (loss) from operations

6,060

(16,652
)

13,245

(4,612
)

(1,958
)
Interest expense

(2,832
)

(1,991
)

(987
)

(918
)

(6,728
)
Loss on extinguishment of debt

—

(154
)

—

—

(154
)
Income (loss) before taxes

3,228

(18,797
)

12,258

(5,530
)

(8,840
)
Income tax expense (benefit)

769

(3,513
)

2,512

(3,857
)

(4,088
)
Net income (loss) and comprehensive income (loss)

$
2,459

$
(15,284
)

$
9,746

$
(1,673
)

$
(4,753
)
Earnings (loss) per share

Net income (loss) available to shareholders

$
2,459

$
(15,284
)

$
9,746

$
(1,673
)

$
(4,753
)
Basic and diluted earnings (loss) per share

$
0.18

$
(0.91
)

$
0.49

$
(0.08
)

$
(0.27
)
Basic and diluted weighted average shares outstanding

13,443,484

16,799,915

19,740,296

19,711,921

17,447,464

Tax-adjusted pro forma information

Net income (loss) available to shareholders

$
2,459

$
(15,284
)

$
9,746

$
(1,673
)

$
(4,753
)
Pro forma provision for income taxes

70

103

—

—

173

Pro forma net income (loss)

$
2,389

$
(15,387
)

$
9,746

$
(1,673
)

$
(4,926
)
Pro forma basic and diluted earnings (loss) per share

$
0.18

$
(0.92
)

$
0.49

$
(0.08
)

$
(0.28
)
Basic and diluted weighted average shares outstanding

13,443,484

16,799,915

19,740,296

19,711,921

17,447,464

IPO occurred in Q2 of 2019

~~Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.~~

We maintain disclosure controls and procedures that are designed to provide reasonable assurance that information required to be disclosed in the reports we file or submit under the Securities Exchange Act of 1934, as amended (the Exchange Act), is recorded, processed, summarized and reported within the time periods specified in the rules and forms of the SEC, and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, to allow timely decisions regarding required disclosure. In designing disclosure controls and procedures, our management necessarily was required to apply its judgment in evaluating the cost-benefit relationship of possible disclosure controls and procedures. The design of any disclosure controls and procedures also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions. Any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired objectives.

Our management, under the supervision of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) as of the end of the period covered by this Annual Report on Form 10-K and has concluded that, as of the end of such period, our disclosure controls and procedures were effective at the reasonable assurance level.

Our management is responsible for establishing and maintaining adequate internal controls over financial reporting, as such term is defined in Rules 13a- 15(f) and 15d-15(f) of the Exchange Act. Internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with GAAP. Our internal control over financial reporting includes those policies and procedures that: (i) pertain to the maintenance of records that in reasonable detail accurately and fairly reflect the transactions and dispositions of our assets, (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with GAAP, and that our receipts and expenditures are being made only in accordance with authorizations of our management and directors, and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of our assets that could have a material effect on our financial statements.

Our management, under the supervision of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our internal control over financial reporting based on the framework in Internal Control-Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, our management has concluded that, as of December 31, 2020, our internal control over financial reporting was effective.

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

This Annual Report on Form 10-K does not include an attestation report of our independent registered public accounting firm due to an exemption established by the JOBS Act for “emerging growth companies.”

While preparing for the IPO in 2019 and as of December 31, 2019, we identified material weaknesses in the design and operation of our internal control over financial reporting that have been remediated as of December 31, 2020 as defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act. In 2019 and 2020, we have taken numerous steps to enhance our internal control environment and remediate the prior material weaknesses.

The information required by this Item with respect to directors and Section 16 compliance is included under the captions “Election of Directors,” “Corporate Governance – Committees” and “Delinquent Section 16(a) Reports,” respectively, in the Company’s definitive proxy statement for its 2021 annual meeting of shareholders (Proxy Statement) and is hereby incorporated herein by reference. Information with respect to the executive officers of the Company appears in Item 1 of this Annual Report on Form 10-K. The information required by this Item with respect to audit committees and audit committee financial experts is included under the caption “Corporate Governance” in the Proxy Statement and is incorporated herein by reference.

The Company has adopted a Code of Conduct and Ethics that applies to all of the Company’s directors, officers and employees, including the Company’s Chief Executive Officer and Chief Financial Officer and other persons performing similar functions. The Company has posted a copy of the Code of Conduct and Ethics on its website at www.mecinc.com. The Company intends to satisfy the disclosure requirements under Item 5.05 of Form 8-K regarding amendments to, or waivers from, the Code of Conduct and Ethics by posting such information on its website at www.mecinc.com. We are not including the information contained on its website as part of, or incorporating it by reference into, this report.

The information required by this Item is included under the captions “Executive Compensation” and “2020 Director Compensation” in the Proxy Statement and is hereby incorporated herein by reference.

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

The information required by this Item with respect to security ownership of certain beneficial owners and management is included under the caption “Principal Shareholders” in the Proxy Statement and is hereby incorporated by reference.

~~The following table sets forth information with respect to compensation plans under which equity securities of the Company are authorized for issuance as of December 31, 2020:~~

~~Item 13. Certain Relationships and Related Transactions, and Director Independence.~~

~~The information required by this Item is included under the caption “Corporate Governance” in the Proxy Statement and is hereby incorporated by reference.~~

The information required by this Item is included under the caption “Miscellaneous – Independent Registered Public Accounting Firm” in the Proxy Statement and is hereby incorporated by reference.

~~The consolidated~~No financial statements ~~listed in the accompanying index to the consolidated financial statements~~or schedules are filed as part of this Amendment No. 1 to Annual Report on Form ~~10-K.~~

~~All financial statement schedules have been omitted because they are not applicable or the required information is included in the consolidated financial statements and the related notes thereto.~~10-K/A.

The exhibits listed in the exhibit index below are filed ~~as part of~~with this Amendment No. 1 to Annual Report on Form ~~10-K.~~10-K/A.

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, the ~~Registrant~~registrant has duly caused this Amendment No. 1 to Report to be signed on its behalf by the undersigned, thereunto duly authorized.

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this Report has been signed below by the following persons on behalf of the Registrant in the capacities and on the dates indicated.

~~Name~~		~~Title~~	~~Date~~

~~/s/ Robert D. Kamphuis~~		~~Chairman, President, Chief Executive Officer (Principal Executive Officer) and Director~~	~~March 5, 2021~~
~~Robert D. Kamphuis~~
	By:
/s/ Todd M. Butz		~~Chief Financial Officer (Principal Financial and Accounting Officer)~~	~~March 5, 2021~~
~~Todd M. Butz~~

~~/s/ Allen J. Carlson~~		~~Director~~	~~March 5, 2021~~
~~Allen J. Carlson~~			Todd M. Butz

~~/s/ Timothy L. Christen~~		~~Director~~	~~March 5, 2021~~
~~Timothy L. Christen~~

~~/s/ Steven L. Fisher~~		~~Director~~	~~March 5, 2021~~
~~Steven L. Fisher~~

~~/s/ Craig E. Johnson~~		~~Director~~	~~March 5, 2021~~
~~Craig E. Johnson~~

~~/s/ Jennifer J. Kent~~		~~Director~~	~~March 5, 2021~~
~~Jennifer J. Kent~~

~~/s/ Patrick D. Michels~~		~~Director~~	~~March 5, 2021~~
~~Patrick D. Michels~~

~~/s/ Jay O. Rothman~~		~~Director~~	~~March 5, 2021~~
~~Jay O. Rothman~~





			Chief Financial Officer

Wisconsin	39-0944729
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

715 South Street Mayville, Wisconsin	53050
(Address of principal executive offices)	(Zip Code)

		~~Page~~
~~PART I~~
~~Item 1.~~	~~Business~~	1
~~Item 1A.~~	~~Risk Factors~~	12
~~Item 1B.~~	~~Unresolved Staff Comments~~	24
~~Item 2.~~	~~Properties~~	24
~~Item 3.~~	~~Legal Proceedings~~	24
~~Item 4.~~	~~Mine Safety Disclosures~~	24

~~PART II~~
~~Item 5.~~	~~Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities~~	25
~~Item 6.~~	~~Selected Financial Data~~	26
~~Item 7.~~	~~Management’s Discussion and Analysis of Financial Condition and Results of Operations~~	27
~~Item 7A.~~	~~Quantitative and Qualitative Disclosures About Market Risk~~	38
~~Item 8.~~	~~Financial Statements and Supplementary Data~~	39
~~Item 9.~~	~~Changes in and Disagreements With Accountants on Accounting and Financial Disclosure~~	62
~~Item 9A.~~	~~Controls and Procedures~~	62
~~Item 9B.~~	~~Other Information~~	62

~~PART III~~
~~Item 10.~~	~~Directors, Executive Officers and Corporate Governance~~	63
~~Item 11.~~	~~Executive Compensation~~	63
~~Item 12.~~	~~Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters~~	63
~~Item 13.~~	~~Certain Relationships and Related Transactions, and Director Independence~~	63
~~Item 14.~~	~~Principal Accounting Fees and Services~~	63

~~PART IV~~
~~Item 15.~~	~~Exhibits, Financial Statement Schedules~~	64
~~Item 16.~~	~~Form 10-K Summary~~	67

			Payments Due by Period
	Total		2021		2022 – 2023		2024 – 2025		Thereafter
Long-term debt principal payment obligations ⁽¹⁾	$	45,257	$	—	$	—	$	45,257	$	—
Forecasted interest on debt payment obligations ⁽²⁾		5,402		1,440		2,881		1,081		—
Capital lease obligations		2,943		734		1,468		741		—
Operating lease obligations		12,474		3,256		4,660		2,396		2,162
Total	$	66,076	$	5,430	$	9,009	$	49,475	$	2,162

	December 31, 2020		December 31, 2019
Finished goods and purchased parts	$	24,561	$	28,664
Raw materials		11,266		10,834
Work-in-process		5,539		6,194
Total	$	41,366	$	45,692

	Useful Lives Years	December 31, 2020		December 31, 2019
Land	Indefinite	$	1,033	$	1,264
Land improvements	15-39		3,169		3,169
Building and building improvements	15-39		55,172		58,021
Machinery, equipment and tooling	3-10		199,854		204,248
Vehicles	5		3,778		3,738
Office furniture and fixtures	3-7		16,242		15,469
Construction in progress	N/A		3,931		3,154
Total property, plant and equipment, gross			283,179		289,063
Less accumulated depreciation			176,491		164,000
Total property, plant and equipment, net		$	106,688	$	125,063

Large accelerated filer	☐	Accelerated filer	☒
Non-accelerated filer	☐	Smaller reporting company	☒
Emerging growth company	☒

~~Name~~	~~Age~~		~~Position~~
~~Robert D. Kamphuis~~		62	~~Chairman, President and Chief Executive Officer~~
~~Todd M. Butz~~		49	~~Chief Financial Officer~~
~~Ryan F. Raber~~		38	~~Executive Vice President~~―~~Strategy, Sales & Marketing~~
~~Rand P. Stille~~		50	~~Chief Operating Officer~~
~~Eric J. Welak~~		45	~~Executive Vice President―Fabrication~~

Period	Total Number of Shares Purchased		Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs ⁽¹⁾		Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs ⁽¹⁾
October 2020		—	$	—		—	$	19,896,406
November 2020		—	$	—		—	$	19,896,406
December 2020		—	$	—		—	$	19,896,406
Total		—				—

	Twelve Months Ended December 31,
	2020			2019			2018
Net income (loss)	$	(7,092	)	$	(4,753	)	$	17,935
Interest expense		2,668			6,728			3,879
Benefit for income taxes		(2,074	)		(4,088	)		(459	)
Depreciation and amortization		32,089			33,002			20,468
EBITDA		25,591			30,890			41,823
Loss on the extinguishment of debt		—			154			814
Costs recognized on step-up of acquired inventory		—			395			583
Contingent consideration revaluation		—			(6,054	)		(21	)
Deferred compensation expense specific to IPO		—			10,159			—
Long term incentive plan expense specific to IPO		—			9,921			—
Other IPO and DMP acquisition related expenses		—			5,744			495
IPO stock-based compensation expense		1,029			1,871			—
Stock based compensation expense		3,703			1,616			—
Greenwood restructuring charges		2,524			—			—
Adjusted EBITDA	$	32,847		$	54,696		$	43,694
Net sales	$	357,606		$	519,704		$	354,526
EBITDA Margin		7.2	%		5.9	%		11.8	%
Adjusted EBITDA Margin		9.2	%		10.5	%		12.3	%

	Twelve Months Ended December 31,
	2020						2019						Increase (Decrease)
	Amount			% of Net Sales			Amount			% of Net Sales			Amount Change			% Change
Net sales	$	357,606			100.0	%	$	519,704			100.0	%	$	(162,098	)		-31.2	%
Cost of sales		326,105			91.2	%		460,986			88.7	%		(134,881	)		-29.3	%
Manufacturing margins		31,501			8.8	%		58,718			11.3	%		(27,217	)		-46.4	%
Amortization of intangibles		10,706			3.0	%		10,706			2.1	%		—			0.0	%
Profit sharing, bonuses and deferred compensation		8,250			2.3	%		25,105			4.8	%		(16,855	)		-67.1	%
Employee stock ownership plan expense		—			0.0	%		5,453			1.0	%		(5,453	)		-100.0	%
Other selling, general and administrative expenses		19,043			5.3	%		25,466			4.9	%		(6,423	)		-25.2	%
Contingent consideration revaluation		—			0.0	%		(6,054	)		-1.2	%		(6,054	)		-100.0	%
Loss from operations		(6,498	)		-1.8	%		(1,958	)		-0.4	%		4,540			231.9	%
Interest expense		(2,668	)		0.7	%		(6,728	)		1.3	%		(4,060	)		-60.3	%
Loss on extinguishment of debt		—			0.0	%		(154	)		0.0	%		(154	)		-100.0	%
Benefit for income taxes		(2,074	)		-0.6	%		(4,088	)		-0.8	%		(2,014	)		-49.3	%
Net loss and comprehensive loss	$	(7,092	)		-2.0	%	$	(4,753	)		-0.9	%	$	2,339			49.2	%
EBITDA	$	25,591			7.2	%	$	30,890			5.9	%	$	(5,299	)		-17.2	%
Adjusted EBITDA	$	32,847			9.2	%	$	54,696			10.5	%	$	(21,849	)		-39.9	%

	December 31, 2020			December 31, 2019
ASSETS
Cash and cash equivalents	$	121		$	1
Receivables, net of allowances for doubtful accounts of $1,298 as of December 31, 2020 and $526 as of December 31, 2019		42,080			40,188
Inventories, net		41,366			45,692
Tooling in progress		3,126			1,589
Prepaid expenses and other current assets		2,555			3,007
Total current assets		89,248			90,477
Property, plant and equipment, net		106,688			125,063
Assets held for sale		3,552			—
Goodwill		71,535			71,535
Intangible assets-net		61,467			72,173
Capital lease, net		2,581			3,227
Other long-term assets		3,462			1,107
Total		338,533			363,582
LIABILITIES, TEMPORARY EQUITY, AND SHAREHOLDERS’ EQUITY
Accounts payable		33,495			32,173
Current portion of capital lease obligation		626			598
Accrued liabilities:
Salaries, wages, and payroll taxes		10,190			5,752
Profit sharing and bonus		3,089			6,229
Other current liabilities		5,340			3,439
Total current liabilities		52,740			48,191
Bank revolving credit notes		45,257			72,572
Capital lease obligation, less current maturities		2,061			2,687
Deferred compensation and long-term incentive, less current portion		25,631			24,949
Deferred income tax liability		11,887			14,188
Other long-term liabilities		100			100
Total liabilities		137,676			162,687
Commitments and contingencies (see Note 10)
Common shares, no par value, 75,000,000 authorized, 21,093,035 shares issued at December 31, 2020 and 20,845,693 at December 31, 2019		—			—
Additional paid-in-capital		190,793			183,687
Retained earnings		14,998			22,090
Treasury shares at cost, 1,033,645 shares at December 31, 2020 and 1,213,482 at December 31, 2019		(4,934	)		(4,882	)
Total shareholders’ equity		200,857			200,895
Total	$	338,533		$	363,582

	Shareholder’s Equity
	Additional Paid-in-Capital			Treasury Shares			Retained Earnings			Total
Balance as of December 31, 2017	$	—		$	—		$	—		$	—
Balance as of December 31, 2018	$	—		$	—		$	—		$	—
Transfer from temporary equity (see Note 17)		133,806			(57,659	)		29,698			105,845
Share issuance – IPO		101,763			—			—			101,763
Cancellation of treasury stock		(55,369	)		55,369			—			—
Share repurchases		—			(2,592	)		—			(2,592	)
Stock-based compensation		3,486			—			—			3,486
Net loss post IPO		—			—			(7,609	)		(7,609	)
Balance as of December 31, 2019	$	183,687		$	(4,882	)	$	22,089		$	200,895
Net loss		—			—			(7,092	)		(7,092	)
Share repurchases		—			(2,509	)		—			(2,509	)
ESOP contribution		2,374			2,457			—			4,831
Stock based compensation expense		4,732			—			—			4,732
Balance as of December 31, 2020	$	190,793		$	(4,934	)	$	14,998		$	200,857

Balance as of December 31, 2019	$	71,535
Impairment		—
Balance as of December 31, 2020	$	71,535

Balance as of December 31, 2019	$	72,173
Amortization expense		(10,706	)
Balance as of December 31, 2020	$	61,467

Year ending December 31,
2021	$	10,706
2022	$	6,952
2023	$	6,866
2024	$	5,192
2025	$	5,192
Thereafter	$	22,748

	December 31, 2020			December 31, 2019
Current income tax expense (benefit)
U.S Federal	$	129		$	401
State		98			1,544
Total		227			1,945
Deferred income tax expense (benefit)
U.S Federal		(2,457	)		(4,197	)
State		156			(1,836	)
Total		(2,301	)		(6,033	)
Total income tax benefit	$	(2,074	)	$	(4,088	)

	December 31, 2020			December 31, 2019
Income tax expense at the federal statutory rate - 21%	$	(1,925	)	$	(1,854	)
State and local income taxes - net of federal income tax benefits		79			(58	)
Compensation deduction limitation - section 162(m) adjustment		(113	)		357
Income taxed by shareholder before IPO		(387	)		(867	)
Other - perms		51			77
Transaction costs		—			607
Change in tax status		—			(2,355	)
Tax credits generated		(409	)		(254	)
Uncertain tax positions - current year		106			—
Uncertain tax positions - prior year		115			—
Loan fee amortization		698			—
Stock compensation		764			—
Section 481(a) adjustments		(184	)		—
Fixed assets		(452	)		—
State tax return to provision		(121	)		—
Other miscellaneous tax		(296	)		259
Total income tax benefit	$	(2,074	)	$	(4,088	)
Effective tax rate		22.6	%		47.5	%

	December 31, 2020			December 31, 2019
Deferred tax assets:
Deferred compensation	$	8,295		$	8,645
Inventory adjustments		1,506			1,837
Accrued expenses		409			211
Credits		508			279
Net operating loss		2,626			3,120
Other		338			—
Total deferred tax assets		13,682			14,092
Deferred tax liabilities:
Property, plant and equipment		9,485			8,354
Intangibles		15,773			19,305
Inventory adjustment		—			—
Other		311			622
Total deferred tax liabilities		25,569			28,281
Valuation allowance		—			—
Net deferred tax liability	$	(11,887	)	$	(14,188	)

Balance as of December 31, 2019	$	—
Increase from current year tax positions		106
Increase from prior year tax positions		115
Decrease from settlements with tax authority		—
Decrease from expiration of statute of limitations		—
Balance as of December 31, 2020	$	221

			Fair Value Measurements at Report Date Using
	Balance at December 31, 2020		(Level 1)		(Level 2)		(Level 3)
Deferred compensation liability	$	25,631	$	4,865	$	20,766	$	—
Total	$	25,631	$	4,865	$	20,766	$	—

			Fair Value Measurements at Report Date Using
	Balance at December 31, 2019		(Level 1)		(Level 2)		(Level 3)
Deferred compensation liability	$	24,949	$	2,470	$	22,479	$	—
Total	$	24,949	$	2,470	$	22,479	$	—

	Contract Assets		Contract Liabilities
As of December 31, 2019	$	1,589	$	914
Net activity		1,537		146
As of December 31, 2020	$	3,126	$	1,060

	Temporary Equity
	Redeemable Common Shares			Treasury Shares			Retained Earnings
Balance as of December 31, 2017	$	125,042		$	(49,826	)	$	17,671
Net income		—			—			17,936
Purchase of treasury shares		—			(11,833	)		—
Redistribution of stockholders share		—			4,000			—
Change in redemption value of outstanding redeemable common shares, net		8,764			—			(8,764	)
Balance as of December 31, 2018		133,806			(57,659	)		26,842
Net income pre-IPO		—			—			2,856
Transfer from temporary equity to common equity		(133,806	)		57,659			(29,698	)
Balance as of December 31, 2019	$	—		$	—		$	—

	Net Sales						Accounts Receivable
	Twelve Months Ended December 31,						As of		As of
	2020		2019		2018		December 31, 2020		December 31, 2019
Customer
A	15.3	%	15.1	%	22.6	%	11.3	%	<10	%
B	11.1	%	13.5	%	19.3	%	<10	%	<10	%
C	12.5	%	<10	%	17.4	%	12.2	%	<10	%
D	11.6	%	13.1	%	<10	%	<10	%	<10	%
E	<10	%	<10	%	<10	%	<10	%	13.5	%
F	<10	%	<10	%	<10	%	<10	%	10.4	%

	For the Year Ended December 31,
	2020					2019
	Number of Units			Weighted-Average Grant Date Fair Value		Number of Units			Weighted-Average Grant Date Fair Value
Nonvested, beginning of year		326,288		$	17.00		—		$	—
Grants		457,369		$	6.61		331,436		$	17.00
Forfeitures		(62,409	)	$	8.90		(5,148	)	$	17.00
Vested		(264,991	)	$	17.00		—		$	—
Nonvested, end of year		456,257		$	7.69		326,288		$	17.00

	Inputs
Assumptions	2020			2019
Stock price at date of grant/exercise price	$	7.12		$	17.00
Expected term (in years)		5.75			10.00
Estimated volatility		41.2	%		21.3	%
Estimated risk-free rate of return		1.2	%		2.4	%
Expected dividend yield		0.0	%		0.0	%

	Employee Severance and Retention Bonus Reserve			Inventory Excess and Obsolescence Reserve			Other Reserves			Total Reserves
Balance as of December 31, 2019	$	—		$	—		$	—		$	—
Charges		282			622			1,620			2,524
Cash receipts (payments)		(282	)		16			(1,620	)		(1,886	)
Accrual adjustments		—			(638	)		—			(638	)
Balance as of December 31, 2020	$	—		$	—		$	—		$	—

Description	Balance at beginning of period		Additions		Deductions		Balance at end of period
Year ended December 31, 2020
Allowance for doubtful accounts	$	526	$	1,582	$	810	$	1,298
Year ended December 31, 2019
Allowance for doubtful accounts	$	801	$	308	$	583	$	526

	Q1			Q2			Q3			Q4			Full Year
	2020			2020			2020			2020			2020
Net sales	$	108,605		$	62,582		$	91,075		$	95,344		$	357,606
Cost of sales		96,762			63,736			81,340			84,267			326,105
Amortization of intangibles		2,677			2,677			2,677			2,676			10,706
Profit sharing, bonuses, and deferred compensation		1,325			1,194			2,288			3,443			8,250
Employee Stock Ownership Plan expense		675			(675	)		—			—			—
Other selling, general and administrative expenses		5,599			4,552			4,490			4,402			19,043
Income (loss) from operations		1,567			(8,902	)		280			556			(6,498	)
Interest expense		(826	)		(637	)		(647	)		(558	)		(2,668	)
Income (loss) before taxes		741			(9,539	)		(367	)		(2	)		(9,166	)
Income tax expense (benefit)		691			(2,525	)		733			(973	)		(2,074	)
Net income (loss) and comprehensive income (loss)	$	50		$	(7,014	)	$	(1,100	)	$	971		$	(7,092	)
Earnings (loss) per share
Net income (loss) available to shareholders	$	50		$	(7,014	)	$	(1,100	)	$	971		$	(7,092	)
Basic and diluted earnings (loss) per share	$	0.00		$	(0.35	)	$	(0.05	)	$	0.05		$	(0.36	)
Basic and diluted weighted average shares outstanding		19,533,533			19,902,912			20,077,039			20,451,203			19,898,122

Plan Category	Number of securities issued or to be issued upon vesting of units or exercise of outstanding options, warrants, and rights		Weighted average exercise price of outstanding options, warrants and rights ⁽¹⁾		Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column (a))
Equity compensation plans approved by security holders ⁽²⁾		1,550,222	$	8.74		449,778
Equity compensation plans not approved by security holders		—		—		—
Total		1,550,222	$	8.74		449,778

Exhibit Number		Description

~~3.1~~		~~Amended and Restated Articles of Incorporation of Mayville Engineering Company, Inc.~~ ~~(incorporated by reference to Exhibit 3.1 to Amendment No. 1 to the Registration Statement on Form S-1 (File No. 333-230840) filed on April 29, 2019).~~
~~3.2~~		~~Bylaws of Mayville Engineering Company, Inc. as amended to date (incorporated by reference to Exhibit 3.2 to the Company’s Current Report on Form 8-K filed on December 4, 2020).~~
4		~~Description of Mayville Engineering Company, Inc.’s Securities (incorporated by reference to Exhibit 4 to the Company’s Annual Report on Form 10-K filed on March 2, 2020).~~
~~10.1~~†		~~Mayville Engineering Company, Inc. 2019 Omnibus Incentive Plan~~ ~~(incorporated by reference to Exhibit 10.1 to Amendment No. 1 to the Registration Statement on Form S-1 (File No. 333-230840) filed on April 29, 2019).~~
~~10.2~~†		~~Form of Restricted Stock Unit Award Agreement (Non-Employee Director) under the Mayville Engineering Company, Inc. 2019 Omnibus Incentive Plan~~ ~~(incorporated by reference to Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q filed on June 18, 2019).~~
~~10.3~~†		~~Form of Restricted Stock Unit Award Agreement (Employee) under the Mayville Engineering Company, Inc. 2019 Omnibus Incentive Plan(incorporated by reference to Exhibit 10.3 to the Company’s Quarterly Report on Form 10-Q filed on June 18, 2019).~~
~~10.4~~†		Form of Stock Option Award Agreement under the Mayville Engineering Company, Inc. 2019 Omnibus Incentive Plan (incorporated by reference to Exhibit 10.8 to Amendment No. 1 to the Registration Statement on Form S-1 (File No. 333-230840) filed on April 29, 2019).
~~10.5~~†		Form of Restricted Stock Award Agreement (Non-Employee Director) under the Mayville Engineering Company, Inc. 2019 Omnibus Incentive Plan (incorporated by reference to Exhibit 10.11 to Amendment No. 1 to the Registration Statement on Form S-1 (File No. 333-230840) filed on April 29, 2019).
~~10.6~~†		~~Form of Restricted Stock Award Agreement (Employee) under the Mayville Engineering Company, Inc. 2019 Omnibus Incentive Plan~~ ~~(incorporated by reference to Exhibit 10.12 to Amendment No. 1 to the Registration Statement on Form S-1 (File No. 333-230840) filed on April 29, 2019).~~
~~10.7~~†		Form of Stock Option Award Agreement under the Mayville Engineering Company, Inc. 2019 Omnibus Incentive Plan (Full Term Exercise Period on Retirement) (incorporated by reference to Exhibit 10 to the Company’s Current Report on Form 8-K filed on January 29, 2020).
~~10.8~~†		Mayville Engineering Company, Inc. Long-Term Incentive Plan, as amended and restated effective May 13, 2019 (incorporated by reference to Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q filed on June 18, 2019).
~~10.9~~†		~~Mayville Engineering Company, Inc. Deferred Compensation Plan~~ ~~(incorporated by reference to Exhibit 10.3 to the Registration Statement on Form S-1 (File No. 333-230840) filed on April 12, 2019).~~
~~10.10~~†		Form of Severance Agreement between Mayville Engineering Company, Inc. and each of Robert D. Kamphuis and Todd M. Butz (incorporated by reference to Exhibit 10.6 to the Registration Statement on Form S-1 (File No. 333-230840) filed on April 12, 2019).
~~10.11~~		Form of Change in Control Employment and Severance Agreement between Mayville Engineering Company, Inc. and each of Robert D. Kamphuis and Todd M. Butz (incorporated by reference to Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q filed on November 3, 2020).
~~10.12~~		Form of Change in Control Employment and Severance Agreement between Mayville Engineering Company, Inc. and each of Ryan F. Raber and Randall P. Stille (incorporated by reference to Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q filed on November 3, 2020).
~~10.13~~†		~~Memorandum of Agreement between Mayville Engineering Company, Inc. and Robert D. Kamphuis~~ ~~(incorporated by reference to Exhibit 10.7 to the Registration Statement on Form S-1 (File No. 333-230840) filed on April 12, 2019).~~

~~10.14~~		Amended and Restated Credit Agreement, dated as of September 26, 2019, by and among Mayville Engineering Company, Inc., the lenders from time to time party thereto, Wells Fargo Bank, National Association, as Administrative Agent for the lenders, and Wells Fargo Securities, LLC, as Sole Lead Arranger and Sole Bookrunner (incorporated by reference to Exhibit 10 to the ~~Company’s~~ ~~Current Report on Form 8-K filed on October 2, 2019).~~
~~10.15~~		Second Amendment, dated as of June 30, 2020, to the Amended and Restated Credit Agreement, dated as of September 26, 2019, by and among Mayville Engineering Company, Inc., the lenders from time to time party thereto, Wells Fargo Bank, National Association, as Administrative Agent for the lenders, and Wells Fargo Securities, LLC, as Sole Lead Arranger and Sole Bookrunner (incorporated by reference to Exhibit 10 to the Company’s Current Report on Form 8-K filed on July 6, 2020).
21*		~~List of Subsidiaries of Mayville Engineering Company, Inc.~~
23*		~~Consent of Independent Registered Public Accounting Firm.~~
31.1*31.1		Certification of Principal Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2*31.2		Certification of Principal Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32*		~~Certification of Principal Executive Officer and Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906of the Sarbanes-Oxley Act of 2002.~~
99		Proxy Statement for the 2021 Annual Meeting of Shareholders. [To be filed with the Securities and Exchange Commission under Regulation 14A within 120 days after December 31, 2020; except to the extent specifically incorporated by reference, the Proxy Statement for the 2021 Annual Meeting of Shareholders shall not be deemed to be filed with the Securities and Exchange Commission as part of this Annual Report on Form 10-K].
~~101.INS~~		~~XBRL Instance Document~~
~~101.SCH~~		~~XBRL Taxonomy Extension Schema Document~~
~~101.CAL~~		~~XBRL Taxonomy Extension Calculation Linkbase Document~~
~~101.DEF~~		~~XBRL Taxonomy Extension Definition Linkbase Document~~
~~101.LAB~~		~~XBRL Taxonomy Extension Label Linkbase Document~~
~~101.PRE~~		~~XBRL Taxonomy Extension Presentation Linkbase Document~~

~~Report of Independent Registered Public Accounting Firm~~	39

~~Consolidated Balance Sheets as of December 31, 2020 and 2019~~	40

~~Consolidated Statements of Comprehensive Income (Loss) for the Years ended December 31, 2020 and 2019, and 2018~~	41

~~Consolidated Statements of Cash Flows for the Years ended December 31, 2020 and 2019, and 2018~~	42

~~Consolidated Statements of Stockholders’ Equity for the Years ended December 31, 2020 and 2019, and 201~~8	43

~~Notes to Consolidated Financial Statements~~	44

~~MAYVILLE ENGINEERING COMPANY, INC.~~

Date: ~~March 5,~~May 3, 2021	By:	/s/ Robert D. Kamphuis
		Robert D. Kamphuis
		Chairman, President ~~and~~& Chief Executive Officer