UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K/A

Amendment No. 1

For the fiscal year ended December 31, 2020

or

For the transition period from                      to                     

Commission file number 001-35944

POWER SOLUTIONS INTERNATIONAL, INC.

(Exact Name of Registrant as Specified in its Charter)

(630) 350-9400

(Registrant’s Telephone Number, Including Area Code)

Securities Registered Pursuant to Section 12(b) of the Act:

Securities Registered Pursuant to Section 12(g) of the Act:

Common Stock, par value $0.001 per share

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 and Section 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 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 if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of the registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.  ☐

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

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 5,157,756 shares of Common Stock held by non-affiliates of the registrant as of June 30, 2020 was $20.6 million based on the last reported sale price on the over-the-counter (“OTC”) market on June 30, 2020 (although the total market capitalization of the registrant as of such date was approximately $91.3 million). Shares of the registrant’s Common Stock held by each executive officer and director and by each person who holds 10% or more of the outstanding Common Stock have been excluded in that such persons may be deemed to be affiliates. This determination of affiliate status is not necessarily a conclusive determination for other purposes.

As of April 19, 2021, there were 22,892,413 outstanding shares of the Common Stock of the registrant.

DOCUMENTS INCORPORATED BY REFERENCE

None.

TABLE OF CONTENTS

EXPLANATORY NOTE

This Amendment No. 1 (this “Amendment”) on Form 10-K/A amends the Annual Report on Form 10-K for the year ended December 31, 2020 of Power Solutions International, Inc. (“PSI” or the “Company”) filed with the Securities and Exchange Commission (the “SEC”) on March 30, 2021 (the “Original 10-K”) to include the information required by Items 10 through 14 of Part III (the “Part III Disclosure”) of the Original 10-K. This information was previously omitted from the Original 10-K in reliance on General Instruction G(3) to Form 10-K, which permits the information in the above referenced items to be incorporated in the Form 10-K by reference to the Company’s definitive proxy statement if such statement is filed no later than 120 days after the Company’s fiscal year-end.

The information included herein as required by the Part III Disclosure is more limited than what is required to be included in the definitive proxy statement to be filed in connection with PSI’s 2020 Annual Meeting of Stockholders. Accordingly, the definitive proxy statement to be filed at a later date will include additional information related to the topics herein and additional information not required by the Part III Disclosure.

Pursuant to the SEC rules, Part IV, Item 15 has also been amended to contain the currently dated certificates from the Company’s principal executive and financial officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. The certificates of the Company’s principal executive and financial officer are attached to this Amendment as Exhibits 31.3 and 31.4. Because no financial statements have been included in this Amendment and this Amendment does not contain or amend any disclosure with respect to Items 307 and 308 of Regulation S-K, paragraphs 3, 4 and 5 of the certifications have been omitted. Additionally, PSI is not including the certificate under Section 906 of the Sarbanes-Oxley Act of 2002 as no financial statements are being filed with this Amendment.

Except for the information described above, the Company has not modified or updated disclosures provided in the Original 10-K in this Amendment. Accordingly, this Amendment does not reflect events occurring after the filing of the Original 10-K or modify or update those disclosures affected by subsequent events. Information not affected by this Amendment is unchanged and reflects the disclosures made at the time the Original 10-K was filed.

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FORWARD-LOOKING STATEMENTS

Certain statements contained in this Amendment to the Annual Report on Form 10-K (“2020 Annual Report”) that are not historical facts are intended to constitute “forward-looking statements” entitled to the safe-harbor provisions of Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). These statements may involve risks and uncertainties. These statements often include words such as “anticipate,” “believe,” “budgeted,” “contemplate,” “estimate,” “expect,” “forecast,” “guidance,” “may,” “outlook,” “plan,” “projection,” “should,” “target,” “will,” “would” or similar expressions, but these words are not the exclusive means for identifying such statements. These forward-looking statements are subject to a number of risks, uncertainties and assumptions that may cause actual results, performance or achievements to differ materially from those expressed in, or implied by, such statements.

The Company cautions that the risks, uncertainties and other factors that could cause its actual results to differ materially from those expressed in, or implied by, the forward-looking statements include, without limitation: the factors discussed in Item 1A. Risk Factors in the Original 10-Ks; the impact of the ongoing COVID-19 pandemic could have on the Company’s business and financial results; the Company’s ability to continue as a going concern; the Company’s ability to raise additional capital when needed and its liquidity; uncertainties around the Company’s ability to meet funding conditions under its financing arrangements and access to capital thereunder; the timing of completion of steps to address, and the inability to address and remedy, material weaknesses; the identification of additional material weaknesses or significant deficiencies; risks related to complying with the terms and conditions of the settlements with the SEC and the United States Attorney’s Office for the Northern District of Illinois (the “USAO”); variances in non-recurring expenses; risks relating to the substantial costs and diversion of personnel’s attention and resources deployed to address the internal control matters; the Company’s obligations to indemnify past and present directors and officers and certain current and former employees with respect to the investigations conducted by the SEC and the criminal division of the USAO, which will be funded by the Company with its existing cash resources due to the exhaustion of its historical primary directors’ and officers’ insurance coverage; the ability of the Company to accurately forecast sales, and the extent to which sales result in recorded revenues; changes in customer demand for the Company’s products; volatility in oil and gas prices; the impact of U.S. tariffs on imports from China on the Company’s supply chain; any delays and challenges in recruiting and retaining key employees consistent with the Company’s plans; any negative impacts from delisting of the Company’s common stock par value $0.001 (the “Common Stock”) from the NASDAQ Stock Market (“NASDAQ”) and any delays and challenges in obtaining a re-listing on a stock exchange.

The Company’s forward-looking statements are presented as of the date hereof. Except as required by law, the Company expressly disclaims any intention or obligation to revise or update any forward-looking statements, whether as a result of new information, future events or otherwise.

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PART III

DIRECTORS AND EXECUTIVE OFFICERS

Directors

The following table and biographical summaries set forth, with respect to each member of the Board of Directors for the Company (the “Board”) as of April 19, 2021, his committee membership, his age, the year in which he first became a director of the Company, and whether or not Weichai America Corp., a wholly-owned subsidiary of Weichai Power Co., Ltd (herein collectively referred to as “Weichai”) designated such director to serve on the Board pursuant to the Investor Rights Agreement (as described in the “Related Person Transactions” section in this Amendment) entered into by the Company and Weichai:

Biography: Dr. Sun has served as the Company’s Chairman of the Board since April 1, 2017. In addition, he is a member of the Compensation Committee and Nominating and Governance Committee (the “Nominating Committee”).

Dr. Sun is currently a Director of Weichai Group Holdings Limited, a multi-field and multi-industry international group which owns six business segments of powertrain, intelligent logistics, automotive, construction machinery, luxury yacht, and finance & after-services (“Weichai Group”). Dr. Sun has been an Executive Director since December 2002 and Executive President since October 2007 of Weichai Power Co., Ltd., a publicly traded company on the Hong Kong Stock Exchange and the Shenzhen Stock Exchange and leading global designer and manufacturer of diesel engines (“Weichai Power”), as well as Chairman of Shandong Weichai Import and Export Co., Ltd., a wholesale distributor of industrial machinery and equipment. On January 1, 2019, Dr. Sun was appointed a Director of Ballard Power Systems Inc., a publicly-traded company on the NASDAQ and Toronto Stock Exchanges that builds fuel cell products. Dr. Sun joined Weifang Diesel Engine Factory in 1988 and held various supervisory positions as a Chief Engineer of Weifang Diesel Engine Factory, and Director of Torch Automobile Group Co., Ltd.

Dr. Sun holds a Master’s degree from Beihang University and a Doctorate degree in Engineering from Tianjin University. Dr. Sun serves on the Board as a Weichai designee.

Dr. Sun brings to the Board extensive managerial experience and leadership gained through his executive roles at leading engine manufacturers.

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Biography: Mr. Li has served as a director of the Company since 2020. Since January 19, 2021, he has been the Chair of the Nominating Committee.

Mr. Li is currently General Counsel and Head of Legal Affairs and Compliance Department of Weichai Power, a publicly traded company on the Hong Kong Stock Exchange and the Shenzhen Stock Exchange, and General Counsel and Head of Legal Affairs and Compliance Department of the Weichai Group. He has held both positions since January 2020. Previously, Mr. Li held the position of Secretary of the Board of Directors of Ferretti S.p.A., a multinational yacht building company from August 2015 to December 2019. He was also the Secretary of the Board of Directors of Ferretti International Holdings S.p.A., the parent company of Ferretti S.p.A., from August 2015 to December 2019. Mr. Li has been serving as a director of Ferretti International Holding S.P.A. and Ferretti S.P.A. since April 4, 2020. Also, he was appointed as the Chairman of the supervisory board of Weichai Lovol Heavy Industries Co. Ltd. on January 3, 2021 and was appointed as a supervisor of Hengtian Kama Co., Ltd., a publicly traded company on the Shanghai Stock Exchange, on January 9, 2021. He has experience assisting boards of directors and executive officers in significant merger and acquisition and initial public offerings projects. Mr. Li also has experience in coordinating between boards and shareholders.

He holds a Bachelor’s degree in Law from the Law School of China University of Political Science and Law. Mr. Li also has a Master’s degree in Law from the Law School of Central University for Nationalities. Mr. Li serves on the Board as a Weichai designee.

Mr. Li brings to the Board skills, experience and qualifications in business and corporate law, his legal expertise and his familiarity with the construction machinery and engine businesses.

Biography: Mr. Shao has served as a director of the Company since 2020.

Mr. Shao is the President and Chairman of the Board of Directors of Weichai America Corp. (“Weichai America”), which focuses on researching, developing and manufacturing a full line of off-road natural gas engines and engine components. Weichai America is a wholly owned subsidiary of Weichai Power Co., Ltd., a publicly traded company on the Hong Kong Stock Exchange and the Shenzhen Stock Exchange. From May 2012 to April 2018, Mr. Shao was President of Weichai Westport Inc., a joint venture between Weichai Power and Westport Fuel Systems Inc., a publicly traded company on the NASDAQ and Toronto Stock Exchanges, that manufactures and sells alternative-fuel engines for automobiles, heavy-duty trucks, power generation and shipping applications.

He has a Bachelor’s degree in Industrial Energy and Power Engineering from Shandong University. Mr. Shao also holds a Master’s degree in Power Engineering from Tianjin University and a Masters of Business Administration degree from Missouri State University. Mr. Shao serves on the Board as a Weichai designee.

Mr. Shao brings to the Board in-depth executive leadership experience in manufacturing engines.

Biography: Mr. Landini has served as a director of the Company since 2001 and assisted in the development and growth of the business of the Company since 1985. Mr. Landini is a member of the Audit Committee. From August 7, 2017 to January 19, 2021, Mr. Landini was the Chair of the Compensation Committee. He also served as a member of the Nominating Committee from April 2017 to January 19, 2021.

Mr. Landini previously served as the Vice President of Finance for the Company’s subsidiary, Power Great Lakes, Inc., from December 1985 to March 1988 and assisted the Company in establishing distributor relationships and

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expanding the territories into which the Company provides its power systems. Mr. Landini is a Partner and Co-founder of Landini, Reed & Dawson, P.C., a certified public accounting and consulting firm in southeastern Michigan, which was established in 1988.

He holds a Bachelor of Arts degree from Albion College and is a licensed Certified Public Accountant in the state of Michigan. Mr. Landini qualifies as an “Audit Committee Financial Expert” under applicable SEC regulations and has substantial audit experience gained from his tenure as a partner at a certified public accounting and consulting firm.

Mr. Landini brings to the Board an in-depth knowledge and understanding of the Company’s business and operations, having served as Vice President of Finance for one of the Company’s subsidiaries.

Biography: Mr. Wu has served as a director of the Company since August 20, 2019. Since January 19, 2021, he has been the Chair of the Compensation Committee.

Since February 2021, Mr. Wu has served in a finance planning and analysis role at Beijing Bytedance Network Technology Co., Ltd. Prior to that, Mr. Wu served as the Chief Financial Officer, International Business of Weichai Group, an affiliate of Weichai America Corp., from 2014 to January 2021. Mr. Wu joined Weichai Group in 2012 and previously served as Senior Manager, International Business. Prior to joining Weichai Group, Mr. Wu was employed at PricewaterhouseCoopers in various roles of increasing seniority from 2003 until 2012.

Mr. Wu earned a Bachelor’s degree in International Business in July 2000 and a Master’s degree in Management in March 2003 from School of Management, University of Science and Technology Beijing, China. Mr. Wu serves on the Board as a Weichai designee.

Mr. Wu brings to the Board substantial experience from leadership positions in the industrial engine sector.

Biography: Mr. Simpkins has served as a director of the Company since July 13, 2017. Since January 19, 2021, he has been the Chair of the Audit Committee. Mr. Simpkins is also a member of the Nominating Committee.

Mr. Simpkins has over 25 years of executive management and financial experience. From June 2016 to December 2016, he served as Chief Financial Officer of Emerson Network Power, part of Emerson Electric Co., a publicly-traded company on the New York Stock Exchange (the “NYSE”). From 2006 to 2015, Mr. Simpkins served as Vice President and Chief Financial Officer of Kennametal Inc., a publicly-traded company on the NYSE and a global leader in the design and manufacture of engineered components, advanced materials and cutting tools. Prior to that role, Mr. Simpkins held various positions within Kennametal since 1995. Prior to Kennametal, he worked as a Manager for PricewaterhouseCoopers from 1986 to 1995. Mr. Simpkins serves on the Board of Trustees at Seton Hill University, Greensburg and previously served on the Board of Trustees of Pennsylvania State University, New Kensington.

He holds a Bachelor of Science degree in Accounting from Pennsylvania State University. Mr. Simpkins qualifies as an “Audit Committee Financial Expert” under applicable SEC regulations and has substantial public-company reporting experience gained from his roles as Chief Financial Officer during his career.

Mr. Simpkins brings to the Board significant management experience, as well as his experience as a Chief Financial Officer.

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Biography: Mr. He has served as a director of the Company since November 14, 2019. Mr. He is a member of the Audit and Compensation Committees.

Mr. He has served as Associate Director, Financial Planning & Analysis for CytomX Therapeutics (“CytomX”), a NASDAQ-listed biotechnology company, since February 2021, and previously served as a Consultant to CytomX beginning in February 2020. Previously, Mr. He served as Director of Finance and Reporting for Blackthorn Therapeutics, a clinical-stage biotechnology company, from June 2019 to December 2019. Prior to that, Mr. He served as the Head of Finance at GenapSys, Inc. from 2018 until May 2019. From 2014 until 2018, Mr. He was the finance director of SciClone Pharmaceuticals, Inc., a NASDAQ-listed specialty pharmaceutical company with main operations in China. From January to June 2014, Mr. He served as Vice President of Finance and the Controller of Augmedix, Inc., a privately held technology-enabled medical documentation company. From October 2011 to December 2013, Mr. He was employed as Vice President of Finance at Baidu Leho.com, a private company backed by Baidu, a NASDAQ-listed company.

Mr. He earned his Bachelors of Science degree in Accounting from Beijing University of Technology in July 1992 and his Masters of Business Administration degree from University of Chicago Booth School of Business in December 2006. Mr. He is a U.S. certified management accountant and a China certified public accountant. Mr. He qualifies as an “Audit Committee Financial Expert” under applicable SEC regulations and has substantial public company reporting experience gained from his roles as a financial officer and controller of public companies during his career.

Mr. He brings to the Board substantial financial and managerial experience gained through leadership roles at public companies.

Executive Officers

The following table sets forth certain information with respect to the Company’s executive officers as of April 19, 2021.

The narrative descriptions below set forth the employment and position with the Company, principal occupation and education for each of the Company’s six current executive officers.

Lance Arnett was appointed as the Company’s Chief Executive Officer and President effective February 15, 2021.

Mr. Arnett previously served as the Company’s Chief Commercial Officer since November 18, 2019. Prior to joining the Company, from January 2009 to November 2019, he worked at Cummins Inc., a publicly traded company on the NYSE that designs, manufactures, distributes and services a broad portfolio of power solutions. During his tenure, he served in various capacities for Cummins Central Region in Minnesota, most recently serving as Director and Chief of Staff of their North American OEM Performance Cell. In this capacity, he oversaw direct

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strategy for their North American business including sales, engineering, assembly and upfit, pricing, marketing, and customer support. His previous roles at Cummins Central Region include serving as Interim President, Vice President of OEM business, Vice President of OEM and Customer Care and Executive Director of Operational Effectiveness. Prior thereto, from 2006 to 2009, he worked as Business Development Manager for PreVisor, Inc. and, from 2001 to 2006, he served as Director, Franchise Sales and Development at Mighty Distributing System of America (Mighty Auto Parts). Earlier in his career, he served in management and sales roles within the staffing industry.

Mr. Arnett received a Bachelor’s degree in Economics from The Ohio State University and a Master’s in Business Administration from the University of St. Thomas.

Donald P. Klein has served as the Chief Financial Officer since January 19, 2021 and as the Principal Accounting Officer since May 14, 2018.

Mr. Klein previously served as PSI’s Interim Chief Financial Officer from July 20, 2020 to January 19, 2021 and PSI’s Corporate Controller from May 14, 2018 to July 20, 2020. Prior to joining the Company, he served as Assistant Corporate Controller at Littelfuse, Inc., a publicly traded company on the NASDAQ, with customers in the electronics, automotive and industrial markets with products that include fuses, semiconductors, polymers, ceramics, relays and sensors. Prior to that role, from 2008 to 2017, Mr. Klein served in various positions of increasing responsibility within finance and accounting, including most recently as Assistant Corporate Controller, at Navistar International Corporation, a NYSE-listed global manufacturer of commercial and military trucks, school buses, diesel engines and provider of service parts for trucks and diesel engines. Prior to Navistar, he worked for Hewitt Associates as Manager of External Reporting and at Ernst & Young LLP as a senior manager of assurance and advisory services.

Mr. Klein holds a Bachelor of Business Administration degree majoring in Accounting from the University of Wisconsin—Madison and is a certified public accountant.

Kenneth J. Winemaster joined the Company in December of 1985 and was a founder of the Company with his father Bill and brother Gary. He was appointed as Executive Vice President on November 28, 2017. Mr. Winemaster served as the Company’s Senior Vice President from 2001 to 2017 and also served as the Company’s Secretary from 2001 to 2013. In addition, Mr. Winemaster served as a director of the Company from 2001 to 2011. He has served on the Board of Directors of Avon Old Farms School, an independent boarding school in Connecticut, since 2014. He served on the Caterpillar Industrial Strategy Council from 2001 to 2015, a council that developed market strategy for Perkins Distributors and CAT Dealers in North America. Mr. Winemaster has significant management experience setting strategy and supporting operations, supply chain and customer service.

Prior to joining the Company, Mr. Winemaster attended Michigan State University.

Jason C. Lin was appointed as the Chief Quality Officer on March 15, 2021 after serving as Chief Technical Officer since June 2019. His role as Chief Quality Officer includes the oversight of the Company’s Total Quality System, including setting up corporate wide quality structure, processes and organizations, including the central quality group and each related functional area; building close loop measures and continuously improving processes with selected tools, and reducing warranty expenses and increasing customer satisfaction. Mr. Lin served as a member of the Company’s Board from May 2017 until June 2019. From 2009 to July 2016, Mr. Lin served as Chief Executive Officer and President of Société Internationale des Moteurs Baudouin, a France-based marine engine manufacturing subsidiary of Weichai Power Co., Ltd., a publicly traded company on the Hong Kong Stock Exchange and the Shenzhen Stock Exchange. During this tenure, he also served as an Executive Technical Director and adviser to the Chairman of Weichai Power Co., Ltd. From February 2001 to July 2006, Mr. Lin was employed by International Truck and Engine Corporation, a truck, bus and diesel engine manufacturer subsidiary of NYSE-listed Navistar International Corporation, in engineering management positions. Earlier in his career, Mr. Lin was employed in engineering positions by Cummins Engine Company, a NYSE-listed company and worked in Japan for Komatsu-Cummins Engine Company as Vice President.

Mr. Lin received his Bachelor of Science degree and Master of Science degree in Mechanical Engineering from National Cheng Kung University in Taiwan, and his Master of Science degree and PhD. in Mechanical Engineering from the University of Wisconsin—Madison. Mr. Lin previously served as a member of the Company’s Board from May 2017 to June 2019.

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C. (Dino) Xykis was appointed as the Chief Technical Officer on March 15, 2021. Mr. Xykis is responsible for the oversight of the Company’s advanced product development, engineering design and analysis, on-highway engineering, applied engineering, emissions and certification, Waterford, Michigan engineering operations, program management and product strategic planning. Since joining the Company in 2010 and until his appointment as Chief Technical Officer in March 2021, Mr. Xykis served as Vice President of Engineering for the Company. He has more than 30 years of professional experience in multi-disciplined engineering areas including senior management and executive positions at various companies including Cummins Inc., an NYSE-listed company, and Generac Power Systems, an NYSE-listed company. Mr. Xykis also served as Adjunct Professor of Mechanical Engineering and Mechanics at the Milwaukee School of Engineering and previously served on the audit and compensation committees of the Board of Directors of Image Sensing Systems, a publicly traded company on NASDAQ, from 1996 to 2001. Mr. Xykis has also served on the advisory board of CEGE, College of Science and Engineering, University of Minnesota for the past eight years.

Mr. Xykis holds a Bachelor’s degree in Structural Engineering, a Master’s degree in Vibration/Dynamics, and a PhD. in Structural/Applied Mechanics from the University of Minnesota, Minneapolis.

Delinquent Section 16(a) Reports

Section 16(a) of the Exchange Act requires the Company’s directors and executive officers, and persons who own more than ten percent of a registered class of the Company’s equity securities, to file with the SEC initial reports of ownership and reports of changes in ownership of the Company’s common stock and other equity securities. Officers, directors and greater than ten percent stockholders are required by SEC regulation to furnish PSI with copies of all Section 16(a) forms they file.

To the Company’s knowledge, including PSI’s review of the copies of such reports furnished to the Company and written representations that no other reports were required during 2020, all Section 16(a) filing requirements were satisfied on a timely basis, except the following reports for Gary Winemaster: one Form 4 filed in March 2020 (reporting eleven transactions), one Form 4 due in June 2020 (reporting two transactions), one Form 4 due in October (reporting one transaction), one Form 4 due in October (reporting one transaction), two Form 4s due in November (each reporting one transaction), three Form 4s due in December (the first Form 4 reporting five transactions; the second and third Form 4s each reporting one transaction). No reasons were given for the late filings.

CORPORATE GOVERNANCE

Audit Committee

The Company has a separately designated Audit Committee. Each member of the Audit Committee is financially literate and the Board has determined that each of Mr. Simpkins, the chair of the Audit Committee, and Mr. He and Mr. Landini qualify as an “Audit Committee Financial Expert” as defined in applicable SEC rules because he or she, as applicable, meets the requirement for past employment experience in finance or accounting, requisite professional certification in accounting or comparable experience. The Board has determined that each of Mr. Simpkins, Mr. Landini and Mr. He meets the independence requirements for audit committee members under NASDAQ rules.

Code of Business Conduct and Ethics

The Company has adopted a code of business conduct and ethics that applies to all of PSI’s employees, officers and directors, including those officers responsible for financial reporting. The code of ethics is available on the Company’s website at www.psiengines.com under “Investors” and then “Governance.”

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EXECUTIVE COMPENSATION

The named executive officers for the year ended December 31, 2020 were:

Executive Team Transitions

Chief Executive Officer Transition

As previously disclosed, effective February 15, 2021 (the “Retirement Date”), Mr. Miller retired as Chief Executive Officer and President and Lance Arnett, who previously served as the Company’s Chief Commercial Officer, was promoted to Chief Executive Officer as his successor. In connection with Mr. Miller’s retirement from the Company, Mr. Miller and the Company entered into a Separation Agreement and Release, effective the Retirement Date (the “Separation Agreement”). Pursuant to the Separation Agreement and the retirement of Mr. Miller, he is entitled to receive (a) a lump-sum cash severance payment of $360,000, (b) subject to his election to receive continued group health plan coverage under COBRA, continued coverage at active-employee rates for up to 12 months after the Retirement Date, and (c) a cash payment of $36,000 under the long-term incentive plan (“LTI”) at the same time other LTI participants are paid, but in no event later than December 31, 2021.

Mr. Miller continues in a transition support role on an as-needed basis until the earlier of 90 days following the Retirement Date or such date as the transition period is terminated pursuant to his Separation Agreement. Subject to his compliance with the terms of the Separation Agreement, Mr. Miller is entitled to receive a transition fee of $30,000 payable every 30 days during the Transition Period. The Separation Agreement contains a release of the Company by Mr. Miller and mutual non-disparagement provisions. Mr. Miller also agreed that the confidentiality, non-competition and non-solicitation provisions in his current employment agreement with the Company will remain in effect. Finally, Mr. Miller agreed to cooperate with, and make himself reasonably available to, the Company for a period ending twelve months following termination of the transition period in order to assist with the transition of his duties at a rate of $250 per hour plus expenses.

Chief Financial Officer Transition

As previously disclosed, Mr. Avery resigned as Chief Financial Officer and Donald P. Klein was appointed to serve as the Company’s Interim Chief Financial Officer, each effective July 20, 2020 (“Resignation Date”). Mr. Avery transitioned to a consulting role for the Company and entered into a Consulting Agreement and Release, effective on the Resignation Date (the “Consulting Agreement”). Pursuant to the Consulting Agreement Mr. Avery is entitled to receive (a) a cash severance payment of $300,000 in 12 equal monthly installments of $25,000, (b) subject to his election to receive continued group health plan coverage under COBRA, continued coverage at active-employee rates for up to 12 months after the Resignation Date, (c) a cash payment of $155,979.59 under the Company’s Key Performance Indicator (“KPI”) plan for 2019 (and if a KPI plan had been in place for 2020, a prorated bonus through July 20, 2020), and (d) a cash payment of $15,000 for transition services.

The Consulting Agreement also provides that Mr. Avery will assist a transition support role on an as-needed basis until the earlier of 90 days following the Resignation Date or such date as the transition period is terminated pursuant to his Consulting Agreement. Subject to compliance with the terms of the Consulting Agreement, Mr. Avery is entitled to receive a consulting fee of $25,000 payable every 30 days during the transition period. The Consulting Agreement contains a release of the Company by Mr. Avery and mutual non-disparagement provisions. Mr. Avery also agreed that the confidentiality, non-competition and non-solicitation provisions in his current employment agreement with the Company will remain in effect. Finally, Mr. Avery agreed to cooperate with, and make himself reasonably available to, the Company for a period ending twelve months following termination of the transition period in order to assist with the transition of his duties and financial matters with which he has knowledge at a rate of $250 per hour plus expenses.

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Summary Compensation Table

The table below summarizes our named executive officers’ compensation for the services rendered to the Company, in all capacities, for the years ended December 31, 2020 and 2019.

Employment Agreements with Named Executive Officers

As disclosed above, Mr. Arnett was promoted on February 15, 2021 and entered into an employment agreement with the Company at that time that superseded his prior employment agreement as Chief Commercial Officer.

Mr. Arnett’s employment agreement provides that he will receive (a) an annual salary of $400,000 per year, which will increase to $425,000 per year on August 15, 2021; (b) an annual incentive bonus under the Company’s KPI, with a target 60% of his base salary or as generally determined by the Company; (c) a bonus under the Company’s LTI plan with a target of 60% of his base salary or as generally determined by the Company; (d) subject to approval of the Compensation Committee, an award of 80,000 SARs pursuant to the Company’s 2012 Incentive Compensation Plan, with a strike price determined at the time grant, and with vesting to occur in equal installments, subject to Mr. Arnett’s continuous service, on each of the first four anniversaries of the effective date, subject to his continued employment; (e) an automobile allowance of $1,200 per month; (f) up to $20,000 in reasonable relocation expenses if Mr. Arnett moves to the Chicagoland area; and (g) standard employee benefits as are generally available to employees of the Company.

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If the Company terminates Mr. Arnett without cause (as defined in his employment agreement), in addition to payment of any accrued obligations, Mr. Arnett would be eligible to receive severance, subject to his execution of a general release of claims, consisting of: (i) certain accrued obligations; (ii) any determined, but unpaid, KPI or LTI bonus relating to the fiscal year prior to the fiscal year of termination; (iii) accelerated vesting of any unvested SARs; (iv) a prorated KPI or LTI bonus for the fiscal year in which his termination occurs; (v) 12 months of salary continuation payments; and (vi) 12 months of health benefit continuation coverage on the same terms as provided before Mr. Arnett’s termination.

Mr. Winemaster entered into an employment agreement with the Company on November 28, 2017, which provided he would continue as the Company’s executive vice president, a position he had served as since 2007. Mr. Winemaster’s employment agreement provides that he will receive (a) an annual salary of $325,000 per year, which may be increased at the discretion of the Board; (b) an annual incentive bonus under the Company’s KPI, with a target 50% of his base salary; (c) cash and incentive equity payments under the Company’s key employee retention plan “KERP” (which have all been paid or vested as of March 2019); (d) use of a Company automobile and certain expenses related thereto; and (e) standard employee benefits as are generally available to employees of the Company.

If the Company terminates Mr. Winemaster without cause (as defined in his employment agreement) or for any reason other than for cause, or if Mr. Winemaster’s employment is terminated due to his death or disability, Mr. Winemaster would be eligible for: (i) certain accrued obligations; (ii) any determined, but unpaid KPI bonus relating to the fiscal year prior to the fiscal year of termination; (iii) 12 months of salary continuation payments; and (iv) 12 months of health benefit continuation coverage on the same terms as was provided before Mr. Winemaster’s termination. In addition, Mr. Winemaster also would have received accelerated payment or vesting, as applicable, for his cash and equity awards under the KERP. If Mr. Winemaster is terminated for cause, he will only receive accrued obligations required to be paid by applicable law.

Messrs. Miller and Avery’s employment agreements terminated in connection with their retirement and resignation form the Company respectively. The terms of their Separation Agreement and Consulting Agreement, respectively, are described above under “Executive Team Transitions.”

Each named executive officer is bound by certain confidentiality and restrictive covenants under their current or former employment agreements.

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Outstanding Equity Awards at 2020 Year-End

The table below shows outstanding SAR awards as of December 31, 2020 held by each named executive officer. No stock awards remained outstanding for any named executive officers as of December 31, 2020.

Potential Payments Upon Termination or Change in Control

As of December 31, 2020, the Company had employment agreements with Messrs. Arnett, Winemaster and Miller. As explained in more detail under the “Executive Team Transitions” section above, Messrs. Arnett and Winemaster are the only named executive officers currently with an employment agreement with the Company, which provides for payments upon termination without “cause” and for Mr. Winemaster, also provides for payments upon any termination other than for “cause”, including upon death or disability (as summarized above under the heading, “Employment Agreements with Named Executive Officers”). For a detailed description of the termination payments received by Messrs. Miller and Avery in connection with their retirement and resignation, respectively, from the Company, please see the “Executive Team Transitions” section above.

Other than these arrangements and accelerated vesting of equity awards under the 2012 Plan, the Company currently does not have any compensatory plans or arrangements in place that provide for any payments or benefits upon the resignation, retirement or any other termination of any of the named executive officers, as the result of a change in control, or from a change in any named executive officer’s responsibilities following a change in control.

Clawback Policy

As part of the Company’s derivative litigation settlement, the Company adopted a formal clawback policy covering specified incentive compensation of officers (defined as only those individuals the Company has designated as subject to the reporting and liability provisions of Section 16 of the Exchange Act). This provision will be included in any new or amended employment agreements entered into with any existing or future officers of the Company on and after April 11, 2019. The clawback provision will provide that upon a termination for cause, an officer shall automatically forfeit:

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“Cause” means that the Company makes a good faith determination that the officer has: (1) violated any Company policy or procedure that causes material harm or risk to the Company including, but not limited to, sexual harassment, misappropriation, or fraud; (2) been convicted of a crime which is injurious to the Company’s operation or reputation; (3) engaged in a material breach of the officer’s employment agreement; (4) engaged in willful failure or willful inability to perform the officer’s duties under the officer’s employment agreement; (5) engaged in any act or omission, which in any material way impairs the reputation, goodwill or business position of the Company; or (6) the officer is prohibited by order of a government agency or court from being employed by the Company or any Company affiliate in the role set forth in the officer’s employment agreement.

For purposes of subsections (3) and (4) of this definition, a termination will not be for “Cause” to the extent such conduct is curable, unless the Company shall have notified the officer in writing describing such conduct and prescribing conduct required to cure such conduct and the officer shall have failed to cure such conduct within thirty (30) business days after his or her receipt of such written notice. For purposes of this definition of Cause, no act or failure to act on the part of the officer shall be considered willful if it is done, or omitted to be done, by the officer in good faith and with a good-faith belief that the officer’s act or omission was in the best interests of the Company.

Director Compensation

PSI directors generally receive the following compensation for their services as members of the Board:

The Company also reimburses directors for necessary and reasonable travel and other related expenses incurred in connection with the performance of their official duties of attendance at each meeting of the Board or any Committee.

The table below summarizes the compensation paid to each director for their service on the Board for the year ended December 31, 2020:

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SECURITY OWNERSHIP OF

CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

The following table sets forth information known to the Company regarding beneficial ownership of shares of the Company’s common stock as of April 19, 2021, by:

The amounts and percentages of shares beneficially owned are reported on the basis of regulations of the SEC governing the determination of beneficial ownership of securities. Under SEC rules, a person is deemed to be a “beneficial owner” of a security if that person has or shares voting power or investment power, which includes the power to dispose of or to direct the disposition of such security. A person is also deemed to be a beneficial owner of any securities of which that person has a right to acquire beneficial ownership within 60 days. Securities that can be so acquired are deemed to be outstanding for purposes of computing such person’s ownership percentage, but not for purposes of computing any other person’s percentage. Under these rules, more than one person may be deemed to be a beneficial owner of the same securities, and a person may be deemed to be a beneficial owner of securities as to which such person has no economic interest.

Beneficial ownership of Common Stock is based on 22,892,413 shares of Common Stock issued and outstanding as of April 19, 2021.

Except as otherwise indicated in the footnotes, each of the beneficial owners listed has, to the Company’s knowledge, sole voting and investment power with respect to the indicated shares of Common Stock. Addresses for the beneficial owners are set forth in the footnotes to the table.

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Equity Compensation Plan Information

The following table summarizes information regarding the securities that may be issued under the 2012 Plan as of December 31, 2020:

RELATED PERSON POLICY AND TRANSACTIONS

Related Person Transactions Policy and Procedures

In the ordinary course of the Company’s business, the Company may from time to time enter into transactions with its directors, officers and 5% or greater stockholders. The Audit Committee is responsible for approving related party transactions, as defined in applicable rules promulgated by the SEC. Our Audit Committee operates under a written charter pursuant to which all related party transactions are reviewed for potential conflicts of interest situations. Such transactions must be approved by our Audit Committee prior to consummation.

Related Person Transactions

Other than as described below, during the years ended December 31, 2020 and 2019, the Company did not enter into any related person transactions.

Weichai

In March 2017, the Company and Weichai executed a share purchase agreement (the “SPA”) with Weichai. Under the terms of the SPA, Weichai invested $60.0 million in the Company (the “Weichai Transaction”) by purchasing a combination of newly issued common and preferred stock as well as a stock purchase warrant, which significantly strengthened the Company’s financial condition and contributed to the subsequent extinguishment of a $60.0 million term loan.

The stock purchase warrant issued to Weichai (the “Weichai Warrant”) was exercisable for any number of additional shares of common stock such that Weichai, upon exercise, would hold 51% of the common stock then outstanding on a fully dilutive basis, on terms and subject to adjustments as provided in the SPA. On April 23, 2019, Weichai exercised the Weichai Warrant and increased its ownership to 51.5% of the Company’s outstanding

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common stock, as of such date. With the exercise of the Weichai Warrant in April 2019, Weichai owns a majority of the outstanding shares of the common stock of the Company. As a result, Weichai is able to exercise control over matters requiring stockholders’ approval, including the election of the directors, amendment of the Company’s charter and approval of significant corporate transactions.

Weichai also entered into an Investor Rights Agreement (the “Rights Agreement”) with the Company upon execution of the SPA. The Rights Agreement provides Weichai with representation on the Company’s Board and management representation rights. According to the Rights Agreement, once Weichai exercised the Weichai Warrant and became the majority owner of the Company’s outstanding shares of common stock calculated on a fully diluted as-converted basis (excluding certain excepted issuances), the Company became required to appoint to the Board an additional individual designated by Weichai or such additional numbers of individuals so that Weichai designees constitute the majority of the directors serving on the Board. As of the date of this filing, Weichai has four representatives on the Board, which constitutes the majority of the directors serving on the Board.

The Company and Weichai executed a strategic collaboration agreement (the “Collaboration Agreement”) on March 20, 2017, in order to achieve their respective strategic objectives and enhance the strategic cooperation alliance to share experiences, expertise and resources. Among other things, the collaboration arrangement established a joint steering committee, permitted Weichai to second a limited number of certain technical, marketing, sales, procurement and finance personnel to work at the Company and established several collaborations, related to stationary natural-gas applications and Weichai diesel engines. The collaboration arrangement provided for the steering committee to create various sub-committees with operating roles and otherwise governs the treatment of intellectual property of parties prior to the collaboration and the intellectual property developed during the collaboration. The Collaboration Agreement had a term of three years that was set to expire in March 2020. On March 26, 2020, the Collaboration Agreement was extended for an additional term of three years.

In connection with the execution of the amendment and restatement of the Company’s uncommitted revolving credit agreement with Standard Chartered Bank (the “Amended and Restated Uncommitted Revolving Credit Agreement”) on March 26, 2021, the Company entered into an amendment and restatement of the shareholder’s loan agreement originally executed with Weichai America in December 2020 (the “First Amended and Restated Shareholder’s Loan Agreement”) on March 26, 2021. The First Amended and Restated Shareholder’s Loan Agreement provides the Company with a $130.0 million secured subordinated loan facility that expires on April 25, 2022. Under the First Amended and Restated Shareholder’s Loan Agreement, Weichai America is obligated to advance funds solely for purposes of repaying outstanding borrowings under the Amended and Restated Uncommitted Revolving Credit Agreement if the Company is unable to repay such borrowings. Any potential borrowings under the First Amended and Restated Shareholder’s Loan Agreement would bear interest at LIBOR plus 4.50% per annum.

Separation Agreement and Release

Mr. Miller and the Company entered into the Separation Agreement, effective the Retirement Date. Pursuant to the Separation Agreement and the retirement of Mr. Miller, he is entitled to receive (a) a cash severance payment of $360,000, payable within 14 days after the Retirement Date, (b) subject to his election to receive continued group health plan coverage under COBRA, continued coverage at active-employee rates for up to 12 months after the Retirement Date, and (c) a cash payment of $36,000 under the LTI plan at the same time other LTI participants are paid, but in no event later than December 31, 2021.

The Separation Agreement also provides that Mr. Miller will assist with transition services for the Company beginning on the Retirement Date and terminating 90 days thereafter unless earlier terminated pursuant to the Separation Agreement (the “Transition Period”). Subject to his compliance with the terms of the Separation Agreement, Mr. Miller is entitled to receive a transition fee of $30,000 payable every 30 days during the Transition Period. Mr. Miller has agreed to make himself available on an “as needed” basis during the Transition Period to assist with transitioning his duties with the Company and as reasonably directed by the Company’s Chief Executive Officer. Finally, Mr. Miller agreed to cooperate with, and make himself reasonably available to, the Company for a period ending twelve months following termination of the Transition Period in order to assist with the transition of his duties at a rate of $250 per hour plus expenses.

Consulting Agreement and Release

On July 20, 2020, the Company entered into a consulting agreement and release with Charles F. Avery, Jr. the Company’s then Chief Financial Officer. Pursuant to the Consulting Agreement Mr. Avery is entitled to receive (a) a cash severance payment of $300,000 in 12 equal monthly installments of $25,000, (b) subject to his election to receive continued group health plan coverage under COBRA, continued coverage at active-employee rates for up to 12 months after the Resignation Date, (c) a cash payment of $155,979.59 under the KPI plan for 2019 and a prorated KPI plan bonus through the Resignation Date for 2020, if one is put in place for dates prior to the Resignation Date and such KPI bonus has been determined by the Board, and (d) a cash payment of $15,000 for transition services.

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The Consulting Agreement also provides that Mr. Avery will assist with transition consulting services for the Company beginning on the Effective Date and terminating 90 days thereafter unless earlier terminated pursuant to the Consulting Agreement (the “Consulting Period”). Subject to compliance with the terms of the Consulting Agreement, Mr. Avery is entitled to receive a consulting fee of $25,000 payable every 30 days during the Consulting Period. Mr. Avery has agreed to make himself available on an “as needed” basis during the Consulting Period to assist with transitioning his duties with the Company and as reasonably directed by the Company’s Chief Executive Officer

Director Independence

While the Company’s stock is currently traded on the OTCPink market, which requires the Company to establish and maintain fundamental corporate governance standards, the Company has elected to adopt more exacting governance standards that are substantially similar to the NASDAQ listing governance standards. The Board has determined that the Company is a “controlled company,” as defined in Rule 5615(c)(1) of the NASDAQ Marketplace Rules. The Board has based this determination on the fact that Weichai currently owns a majority of the Company’s common stock. Under the NASDAQ rules, a company where more than 50% of the voting power for the election of directors is held by an individual, group or another company is a “controlled company” and may elect not to comply with certain NASDAQ corporate governance requirements, including:

The Company is not currently relying on the controlled company exemption for the above requirements, but may in the future.

Unless the Company avails itself of the “controlled company” status as discussed above, pursuant to NASDAQ listing standards, a majority of the members of the Board must qualify as “independent,” as affirmatively determined by the Board. In addition to the NASDAQ independence requirements, the Company also applies the independence guidelines set forth in its Corporate Governance Guidelines, which are available on the Company’s website at www.psiengines.com in the “Investors” section, under “Governance” which are substantially similar to the NASDAQ’s director independence requirements and “controlled company” exemptions. Consistent with this requirement, based on the review and recommendation of the Company’s Nominating Committee, the Board reviewed all relevant identified transactions or relationships between each of the Company’s directors, or any of their family members, and PSI, the Company’s senior management and the Company’s independent registered public accounting firm, and has affirmatively determined that each of Dr. Sun, Messrs. He, Landini, Li, Simpkins and Wu and each former director Mr. Jiang and Ms. Coolidge meets the standards of independence under the applicable NASDAQ listing standards. In making this determination, the Board found Dr. Sun, Messrs. He, Li, Landini, Simpkins and Wu and former directors Mr. Jiang and Ms. Coolidge to be free of any relationship that would impair his or her individual exercise of independent judgment with regard to the Company. The Board has also determined that each member of its Audit Committee is independent under NASDAQ Rule 5605(a)(2).

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Item 14. Principal Accounting Fees and Services.

AUDIT-RELATED MATTERS

Independent Registered Public Accounting Firm Fees

The following table shows the fees for professional services rendered to us by BDO USA, LLP for services in respect of the years ended December 31, 2020 and 2019.

In accordance with its charter, the Audit Committee approved in advance all audit services provided by the Company’s independent registered public accounting firm for fiscal year 2020.

Pre-Approval Policy and Procedures

In accordance with its charter, the Audit Committee approves in advance all audit and non-audit services to be provided by the Company’s independent registered public accounting firm.

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PART IV

EXHIBIT INDEX

The following documents listed below that have been previously filed with the SEC (1934 Act File No. 001-35944) are incorporated herein by reference:

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None.

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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this Report to be signed on its behalf by the undersigned, thereunto duly authorized, on the 30th day of April, 2021.

Pursuant to the requirements of the Securities Exchange Act of 1934, this Report has been signed below by the following persons on behalf of the Registrant and in the capacities indicated on the 30th day of April, 2021.

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Exhibit 31.3

CERTIFICATION PURSUANT TO 17 CFR 240.13a-14 PROMULGATED UNDER

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Lance Arnett, certify that:

Exhibit 31.4

CERTIFICATION PURSUANT TO 17 CFR 240.13a-14 PROMULGATED UNDER

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Donald P. Klein certify that: