Form DEF 14A AMERICAN SUPERCONDUCTOR For: Jul 31

AMERICAN SUPERCONDUCTOR CORPORATION

114 East Main Street

Ayer, Massachusetts 01432

Notice of Annual Meeting of Stockholders to

be Held on Friday, July 31, 2026

The Annual Meeting of Stockholders (the “Annual Meeting”) of American Superconductor Corporation (“AMSC”) will be held via a completely virtual format through a live audio-only webcast hosted online at www.virtualshareholdermeeting.com/AMSC2026 on Friday, July 31, 2026 at 10:30 a.m., Eastern Time. The Annual Meeting will be held exclusively online and you will not be able to attend the Annual Meeting physically. You will be able to vote your shares electronically and submit questions during the meeting by logging into the website listed above using the 16-digit control number included in the Notice of Internet Availability of Proxy Materials, on your proxy card or on the instructions that accompanied our proxy materials. Online check-in will begin at 10:15 a.m. Eastern Time, and you should allow ample time for the check-in procedures.

At the Annual Meeting, AMSC’s stockholders will consider and act upon the following matters:

Stockholders of record at the close of business on June 4, 2026 will be entitled to notice of and to vote at the Annual Meeting or any continuation, postponement or adjournment thereof. A complete list of these stockholders will be open to the examination of any stockholder at our principal executive offices at 114 East Main Street, Ayer, MA 01432 for a period of ten days prior to the Annual Meeting. The Annual Meeting may be continued or adjourned from time to time without notice other than by announcement at the Annual Meeting.

IT IS IMPORTANT THAT YOUR SHARES BE REPRESENTED AT THE VIRTUAL ANNUAL MEETING. THEREFORE, WHETHER OR NOT YOU EXPECT TO ATTEND THE VIRTUAL ANNUAL MEETING, PLEASE SUBMIT YOUR PROXY (1) OVER THE INTERNET, (2) BY TELEPHONE, OR (3) BY MAIL. FOR SPECIFIC INSTRUCTIONS, PLEASE REFER TO THE QUESTIONS AND ANSWERS BEGINNING ON THE FIRST PAGE OF THE PROXY STATEMENT AND THE INSTRUCTIONS ON THE PROXY CARD RELATING TO THE VIRTUAL ANNUAL MEETING.

By Order of the Board of Directors,

John R. Samia, Secretary

Ayer, Massachusetts

June 18, 2026

Table of Contents

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AMERICAN SUPERCONDUCTOR CORPORATION

114 East Main Street

Ayer, Massachusetts 01432

PROXY STATEMENT

For the Annual Meeting of Stockholders to be Held on Friday, July 31, 2026

This proxy statement is furnished in connection with the solicitation of proxies by the Board of Directors, or Board, of American Superconductor Corporation, or AMSC, for use at the Annual Meeting of Stockholders, or Annual Meeting, to be held via a completely virtual format through a live audio-only webcast hosted online at www.virtualshareholdermeeting.com/AMSC2026 on Friday, July 31, 2026, beginning at 10:30 a.m. Eastern Time, and at any continuation, postponement or adjournment of the Annual Meeting. On or about June 18, 2026, we are releasing this proxy statement together with our annual report, consisting of our Annual Report on Form 10-K for the fiscal year ended March 31, 2026, or 2025 Annual Report, and other information required by the rules of the Securities and Exchange Commission, or SEC, to our stockholders of record on the record date for the meeting. Our 2025 Annual Report is provided without exhibits. Exhibits will be provided, at no charge, upon written request addressed to American Superconductor Corporation, 114 East Main Street, Ayer, MA 01432, Attention: Investor Relations.

Our fiscal year begins on April 1 and ends on March 31. When we refer to a particular fiscal year, we are referring to the fiscal year ended or ending on March 31 of the following year. For example, fiscal 2025 refers to the fiscal year ended March 31, 2026.

Important Notice Regarding the Availability of Proxy Materials

for the Stockholder Meeting to be Held on July 31, 2026

AMSC’s proxy statement and annual report are available at

www.proxyvote.com

The following proxy materials are available for review at www.proxyvote.com:

INFORMATION ABOUT THIS PROXY STATEMENT

Why you received this proxy statement. You are viewing or have received these proxy materials because AMSC’s Board is soliciting your proxy to vote your shares at the Annual Meeting. This proxy statement includes information that we are required to provide to you under the rules of the SEC and that is designed to assist you in voting your shares.

Notice of Internet Availability of Proxy Materials. As permitted by SEC rules, AMSC is making this proxy statement and its 2025 Annual Report available to certain of its stockholders electronically via the Internet. On or about June 18, 2026, we mailed to these stockholders a Notice of Internet Availability of Proxy Materials, or Internet Notice, containing instructions on how to access this proxy statement and our 2025 Annual Report and vote online. If you received an Internet Notice by mail, you will not receive a printed copy of the proxy materials in the mail unless you specifically request them. Instead, the Internet Notice instructs you on how to access and review all of the important information contained in the proxy statement and 2025 Annual Report. The Internet Notice also instructs you on how you may submit your proxy over the Internet. If you received an Internet Notice by mail and would like to receive a printed copy of our proxy materials, then you should follow the instructions for requesting such materials contained on the Internet Notice.

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Printed Copies of Our Proxy Materials. Some of our stockholders received printed copies of our proxy statement, 2025 Annual Report and proxy card. If you received printed copies of our proxy materials, then instructions regarding how you can vote are contained on the proxy card included in the materials.

INFORMATION ABOUT THE ANNUAL MEETING AND VOTING

What is the purpose of the Annual Meeting?

At our Annual Meeting, stockholders will act upon the matters outlined in the accompanying notice of meeting, including the election of the directors named in this proxy statement, the ratification of the appointment of our independent registered public accounting firm and the approval, on an advisory basis, of the compensation of our named executive officers. Stockholders may also consider such other business as may properly come before the meeting. We are not aware of any other business to be brought before the meeting. If any other business is properly brought before the meeting, the designated officers serving as proxies will vote in accordance with their best judgment.

Who is entitled to vote?

You are entitled to vote at the Annual Meeting, or any continuation, postponement or adjournment of the Annual Meeting, only if you were a stockholder of record at the close of business on the record date, June 4, 2026, or if you hold a valid proxy for the Annual Meeting. The number of stockholders of record as of the June 4, 2026 record date was 203. Holders of shares of our common stock are entitled to one vote per share.

Why is AMSC hosting the Annual Meeting in a virtual meeting format only?

A virtual meeting enables increased stockholder attendance and participation because stockholders can participate from any location around the world. The virtual Annual Meeting has been designed to provide the same rights to participate as you would have at an in-person meeting. Because our Annual Meeting is being held virtually over the internet, when we refer to “in person” for aspects pertaining to the Annual Meeting, we mean live virtual attendance through the means described in this proxy statement.

How do I attend the virtual Annual Meeting?

Stockholders of record as of June 4, 2026 will be able to attend and participate in the Annual Meeting online by accessing www.virtualshareholdermeeting.com/AMSC2026. To join the Annual Meeting, you will need to have your 16-digit control number which is included on your Internet Notice, your proxy card (if you received a printed copy of the proxy materials) or the instructions that accompanied the proxy materials.

Even if you plan to attend the Annual Meeting online, we recommend that you also vote by proxy as described herein so that your vote will be counted if you subsequently decide not to attend the Annual Meeting.

Access to the Audio Webcast of the Annual Meeting. The live audio webcast of the Annual Meeting will begin promptly at 10:30 a.m. Eastern Time on July 31, 2026. We encourage our stockholders to access the meeting website prior to the start time. Online access to the audio webcast will open approximately 15 minutes prior to the start of the Annual Meeting to allow time for you to log in and test the computer audio system.

Log in Procedures. To attend the virtual Annual Meeting, visit www.virtualshareholdermeeting.com/AMSC2026 to log in. Stockholders will need their unique 16-digit control number included in your Internet Notice (printed in the box and marked by the arrow), proxy card or the instructions that accompanied the proxy materials. If your shares are held in “street name” (through a bank, broker or other nominee), you should contact your bank, broker or other nominee as soon as possible to obtain your 16-digit control number or otherwise vote through the bank, broker or other nominee.

If you lose your 16-digit control number, you may join the Annual Meeting as a “Guest” but you will not be able to vote, ask questions or access the list of stockholders as of the record date.

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Technical Assistance. Beginning 15 minutes prior to the start of and during the virtual Annual Meeting, we will have technicians ready to assist stockholders with any technical difficulties they may have accessing or hearing the virtual meeting. If you encounter any difficulties accessing the virtual meeting during the check-in or meeting time, please call the technical support number that will be posted on the annual meeting website log-in page.

Will there be a question and answer session during the Annual Meeting?

As part of the Annual Meeting, we will hold a live questions and answers session, during which we intend to answer questions submitted online during the meeting that are pertinent to AMSC and the meeting matters, for up to fifteen minutes following the completion of the Annual Meeting. Only stockholders that have accessed the Annual Meeting as a stockholder (rather than a “Guest”) by following the procedures outlined above in “How do I attend the virtual Annual Meeting?” will be permitted to submit questions during the Annual Meeting. Each stockholder is limited to two questions, each up to a maximum of 1000 characters, in order to allow us to answer questions from as many stockholders as possible. Questions should be succinct and only cover a single topic. We will not address questions that are, among other things:

Questions and answers may be grouped by topic, and we may group substantially similar questions together and answer them once. If there are matters of individual concern to a stockholder and not of general concern to all stockholders, or if a question posed was not otherwise answered, we encourage stockholders to contact us separately after the Annual Meeting.

Additional information regarding the question and answer session will be available in the “Rules of Conduct” available on the Annual Meeting webpage for stockholders that have accessed the Annual Meeting as a stockholder (rather than a “Guest”) by following the procedures outlined above in “How do I attend the virtual Annual Meeting?”.

What constitutes a quorum?

The holders of a majority of the shares of common stock outstanding and entitled to vote at the Annual Meeting will constitute a quorum for the transaction of business at the Annual Meeting. Shares of common stock represented in person or by proxy (including shares that abstain or do not vote with respect to one or more of the matters presented for stockholder approval) will be counted as present and entitled to vote for purposes of determining whether a quorum is present at the Annual Meeting. As of the June 4, 2026 record date, 48,462,307 shares of our common stock were outstanding and entitled to vote.

How do I vote?

If you are a stockholder of record, meaning your shares are registered in your name, you may vote:

(1) Over the Internet: Go to the website of our tabulator, Broadridge, at www.proxyvote.com. Use the 16-digit control number printed on your Internet Notice, proxy card or the instructions that accompanied the

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proxy materials to access your account and vote your shares. You must specify how you want your shares voted or your Internet vote cannot be completed and you will receive an error message. Your shares will be voted according to your instructions.

(2) By Telephone: Call 1-800-690-6903, toll free from the U.S. and Canada, and follow the instructions on your proxy card. You must specify how you want your shares voted and confirm your vote at the end of the call or your telephone vote cannot be completed. Your shares will be voted according to your instructions.

(3) By Mail: Complete and sign your proxy card and mail it in the accompanying postage prepaid envelope to Broadridge, 51 Mercedes Way, Edgewood, NY 11717. Your shares will be voted according to your instructions. If you do not specify how you want your shares voted, they will be voted as recommended by our Board of Directors.

(4) In Person during the Virtual Annual Meeting: You may attend the virtual Annual Meeting and vote during the meeting even if you have already voted by proxy. To vote during the meeting, visit www.virtualshareholdermeeting.com/AMSC2026 on the day of the meeting; you will need the 16-digit control number provided on your Internet Notice or proxy card.

If your shares are held in “street name,” meaning they are held for your account by a bank, broker or other nominee, you may vote:

(1) Over the Internet or by Telephone: You will receive instructions from your bank, broker or other nominee if they permit Internet or telephone voting. You should follow those instructions.

(2) By Mail: You will receive instructions from your bank, broker or other nominee explaining how you can vote your shares by mail. You should follow those instructions.

(3) In Person during the Virtual Annual Meeting: If your shares are not registered in your own name and you would like to vote your shares electronically at the Annual Meeting, you should contact your bank or broker to obtain your 16-digit control number or instructions on how to vote at the meeting through the bank or broker.

Can I change my proxy after I return my proxy card?

Yes. You may revoke your proxy and change your vote at any time before the Annual Meeting. To do so, you must do one of the following:

(1) Vote over the Internet or by telephone as instructed above. Only your latest Internet or telephone vote is counted.

(2) Sign a new proxy card and submit it as instructed above. Only your latest dated proxy card will be counted.

(3) Attend the Annual Meeting, request that your proxy be revoked and vote in person as instructed above. Attending the Annual Meeting will not revoke your proxy unless you specifically request it.

Will my shares be voted if I don’t return my proxy?

If your shares are registered directly in your name, your shares will not be voted if you do not vote over the Internet, by telephone, by returning your proxy card or voting at the Annual Meeting. If your shares are held in “street name” by a bank, broker or other nominee, that person, as the record holder of your shares, is required to vote your shares according to your instructions. Your bank, broker or other nominee will send you directions on how to vote those shares. Under applicable stock exchange rules, if you do not give instructions to your bank, broker or other nominee, it will still be able to vote your shares with respect to certain “discretionary” items, such as the ratification of the appointment of RSM US LLP (“RSM”) as our independent registered public accounting firm, but will not be allowed to vote your shares with respect to certain “non-discretionary” items, such as the election of directors, and the approval, on an advisory basis, of the compensation of our named executive officers. In the case of “non-discretionary” items, shares for which your bank, broker or other nominee does not receive voting instructions will be treated as “broker non-votes.”

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What is the vote required to approve each matter?

(1) Election of Directors. Directors will be elected by a plurality of the votes cast by the stockholders entitled to vote on the election. This means that the seven nominees receiving the most affirmative votes will be elected as directors at the Annual Meeting. Votes withheld and “broker non-votes” will have no effect on the outcome of the election of directors.

(2) Ratification of the Appointment of our Independent Registered Public Accounting Firm. The affirmative vote of the holders of the shares of common stock having a majority of the votes cast by the holders of all of the shares of common stock present or represented and voting on the matter is required for the ratification of the appointment by the Audit Committee of RSM as our independent registered public accounting firm for the fiscal year ending March 31, 2027. Abstentions and “broker non-votes” will have no effect on the outcome of this proposal. Because brokers have discretionary authority to vote on the ratification of the appointment of our independent registered public accounting firm, we do not expect any “broker non-votes” in connection with this proposal.

(3) Approval, on an Advisory Basis, of Named Executive Officer Compensation. The affirmative vote of the holders of the shares of common stock having a majority of the votes cast by the holders of all of the shares of common stock present or represented and voting on the matter is required for the approval, on an advisory basis, of the compensation of our named executive officers. Abstentions and “broker non-votes” will have no effect on the outcome of the proposal. This proposal is non-binding.

Who will count the votes?

Our Board of Directors has appointed a representative of Broadridge Financial Solutions to serve as the inspector of elections at the Annual Meeting and to tabulate the votes.

Are there other matters to be voted on at the meeting?

As of the date of this proxy statement, our Board of Directors does not know of any other matters which may come before the meeting, other than the matters described in this proxy statement. Should any other matter requiring a vote of our stockholders arise and be properly presented at the Annual Meeting, the proxy for the Annual Meeting confers upon the persons named in the proxy and designated to vote the shares discretionary authority to vote, or otherwise act, with respect to any such matter in accordance with their best judgment.

Our Board encourages stockholders to attend the virtual Annual Meeting. Whether or not you plan to attend, you are urged to submit your proxy. Prompt response will greatly facilitate arrangements for the meeting and your cooperation will be appreciated. Stockholders who attend the virtual Annual Meeting may vote their stock personally even though they may have sent in their proxies.

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STOCK OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

The following table sets forth the beneficial ownership of our common stock as of June 4, 2026, or such earlier date as indicated below, by:

Unless otherwise provided, the address of each individual listed below is c/o American Superconductor Corporation, 114 East Main Street, Ayer, Massachusetts 01432.

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CORPORATE GOVERNANCE

Our Board has long believed that good corporate governance is important to ensure that AMSC is managed for the long-term benefit of our stockholders. This section describes key corporate governance guidelines and practices that we have adopted. Complete copies of our committee charters, corporate governance guidelines and code of business conduct and ethics described below have been posted in the “Corporate Governance” section of the “Investors” page of our website at www.amsc.com. Alternatively, you can request a copy of any of these documents by writing to our Investor Relations department at 114 East Main Street, Ayer, Massachusetts 01432 or by calling (978) 399-8344.

Members of the Board

Set forth below, for each director, are his or her name and age, his or her positions (if any) with us, his or her principal occupation and business experience during at least the past five years, the names of other public companies of which he or she has served as a director during at least the past five years and the year of the commencement of his or her term as a director of AMSC. Each of the individuals named below is a nominee for election to our Board at the Annual Meeting. There are no family relationships among any of our directors and executive officers.

Laura A. Dambier, age 67, has been President of Insurance Capital Consulting LLC, a Connecticut limited liability company, an expert witness and consulting firm specializing in insurance operations, since July 2022. Ms. Dambier also has served as an independent consultant since January 2017. From January 1997 to April 2015, she worked at Lincoln Financial Group, which has over $200 billion in assets under management and operates multiple insurance and investment management businesses through subsidiary companies, where she held a series of positions of increasing responsibility culminating as Senior Vice President, Partner Solutions for Life, Claims and Distribution, and a member of the firm’s corporate leadership group. Ms. Dambier led Lincoln Financial’s Partner Solutions, a corporate shared services organization located across four operating locations. Prior to Lincoln Financial, Ms. Dambier also previously served in positions at the U.S. Senate and the American Embassy in Germany. We believe Ms. Dambier’s qualifications to sit on our Board include her broad experience in operations, strategic planning, merger and acquisition integration, financial management, risk management and technology, and her extensive leadership in business, government and not-for-profit organizations. Ms. Dambier has been a director of our company since June 2022.

Terence R. Donnelly, age 65, has been an independent consultant since January 2024. From June 1983 to December 2023, he worked at Commonwealth Edison Company, or ComEd, and PECO Energy Company, or PECO, both units of Chicago-based Exelon Corporation. ComEd runs one of the largest power grids in the nation and employs more than 6,000 people and delivers electricity to over 4 million residential and business customers across northern Illinois including the City of Chicago and PECO serves more than 1.7 million electric and 545,000 natural gas customers in southeastern Pennsylvania. At ComEd and PECO, Mr. Donnelly held a series of positions of increasing responsibility and covering a broad range of functions culminating as ComEd’s President and Chief Operating Officer in which role he served from May 2018 until December 2023. As ComEd’s President and Chief Operating Officer, he was responsible for leading ComEd’s overall performance in the areas of service reliability, operations, engineering, technology, construction, safety, customer satisfaction, financial management and smart grid development. We believe Mr. Donnelly’s qualifications to sit on our board include his extensive operational and financial knowledge of, and executive level management experience in, the electric power industry. Mr. Donnelly has been a director of our company since May 2025.

Arthur H. House, age 83, has been a partner at Cybersecurity Risk Associates, LLC, a Connecticut limited liability company, that advises clients on improving their cybersecurity, compliance and privacy programs, since May 2020. Mr. House also has served as an adjunct professor at the University of Connecticut since March 2020. From April 2020 to December 2020, he served as a cybersecurity policy advisor to the Secretary of State of the State of Connecticut. From October 2016 to October 2019, Mr. House served as Chief Cybersecurity Risk Officer for the State of Connecticut. From June 2012 until October 2016, he was chairman of the Connecticut Public Utilities Regulatory Authority. From January 2009 until May 2012, Mr. House served as Director of Communications of the Office of the Director of National Intelligence and as head of internal and external

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communications for the National Geospatial-Intelligence Agency, a combat support agency for the U.S. Department of Defense. From January 2002 until January 2009, he served as Senior Vice President of Public Affairs at Connecticut-based Webster Bank, a bank that provides business and consumer banking, mortgage, insurance, trust and investment services. Mr. House has also previously served in various positions at the World Bank, the National Security Council and the U.S. Senate. We believe Mr. House’s qualifications to sit on our Board include his extensive experience in the utility and cybersecurity industries, his international business and government relations experience and work in both internal and external corporate communications. Mr. House has been a director of our company since September 2016.

Margaret D. Klein, age 69, has been a professor of ethical leadership at the Naval War College since June 2017. From June 2017 to December 2022, she served as Dean of the College of Leadership and Ethics at the Naval War College. From 1981 to 2017, Ms. Klein served in the United States Navy and held the rank of Rear Admiral at the time of her retirement. As Rear Admiral Klein, she served as the Secretary of Defense’s Advisor for Military Professionalism. She served as Chief of Staff for U.S. Cyber Command and in 2008 served as Director of Operations for the Navy’s Network Warfare Command. In 2011, Ms. Klein commanded an American military force of five ships, 30 aircraft and over 3,300 Sailors and Marines in combat operations in the Mediterranean Sea. She served as the 82nd Commandant of Midshipmen at the U.S. Naval Academy, where she was responsible for 4,400 Navy and Marine Corps officer candidates. Ms. Klein also commanded an aviation squadron and wing. We believe Ms. Klein’s qualifications to sit on our Board include her extensive leadership and management experience gained while serving as a senior officer in the United States Navy and in government and not-for-profit organizations. Ms. Klein has been a director of our company since June 2022.

Barbara G. Littlefield, age 68, has been Chairwoman and Lead Operating Director at Resilient Infrastructure Group, a developer of a renewable natural gas project since February 2021, where she leads the Audit and Compensation Committees. From January 2024 until September 2025, Ms. Littlefield served as interim chief executive officer of Resilient. Ms. Littlefield has been an Operating Director of Exus Renewables, a leading U.S. developer of solar, wind, and battery storage projects, since September 2023 where she leads the Asset Management Committee and sits on the Finance Committee. From August 2014 to May 2020, she served as chief financial officer of Poseidon Water LLC, a leading developer of water infrastructure projects in North America. From September 2013 until August 2014, Ms. Littlefield served as senior vice president, strategy and corporate development, of Poseidon Water LLC. From February 2011 until May 2013, she was senior vice president of corporate development and a board member of Drax Biomass International Inc., an enterprise securing upstream biomass supply for large British electricity generators. From 2006 to 2010, Ms. Littlefield was an executive vice president and chief financial officer of Verenium Corporation, a joint venture company formed to commercialize second generation biofuels technology. We believe Ms. Littlefield’s qualifications to sit on our Board include her extensive financial and strategic management experience and her particular knowledge of large infrastructure projects. Ms. Littlefield has been a director of our company since May 2019.

Daniel P. McGahn, age 54, has been our chairman of the Board since July 2018, chief executive officer since June 2011 and president since December 2009. Mr. McGahn also served as our chief operating officer from December 2009 until May 2011, as senior vice president and general manager of our AMSC Superconductors business unit from May 2008 until December 2009 and vice president of our AMSC Superconductors business unit from January 2008 to May 2008. Previously, Mr. McGahn was our vice president of strategic planning and development from December 2006 to January 2008. From 2003 to 2006, Mr. McGahn served as executive vice president and chief marketing officer of Konarka Technologies, which develops and commercializes Konarka Power Plastic^®, a material that converts light to electricity. We believe Mr. McGahn’s qualifications to sit on our Board include his extensive experience with our company, including serving as our president since December 2009 and our chief executive officer since June 2011, experience in the power electronics industry and with technology companies, and strategic planning expertise gained while working in senior management and as a consultant for other public and private companies. Mr. McGahn has been a director of our company since June 2011.

David R. Oliver, Jr., age 84, is currently an independent consultant. He served as a strategic advisor, mergers and acquisitions, for European Aeronautic Defense and Space Company North America (EADS NA), a European aerospace corporation, from January 2012 until July 2013. From January 2008 until December 2011,

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Mr. Oliver served as executive vice president and chief operating officer for EADS NA. Mr. Oliver also served as chief executive officer of the defense division of EADS NA for most of the four years preceding January 2008 except when he was running the EADS NA portion of the capture effort for the Air Force Tanker program. Before joining EADS NA, Mr. Oliver was stationed in Baghdad as Director of Management and Budget for the Coalition Forces. Prior to that, he served as the United States’ Principal Deputy Undersecretary of Defense for Acquisition and Technology. Mr. Oliver also previously held management positions at both Westinghouse Electric and Northrop Grumman. In the Navy, he commanded diesel and nuclear submarines as well as two submarine groups during the Cold War. His last Navy appointment was as Principal Deputy to the Assistant Secretary of the Navy for Research, Development and Acquisition. Rear Admiral (retired) Oliver’s military decorations include the Defense and Navy Distinguished Service Medals as well as six awards of the Legion of Merit. We believe Mr. Oliver’s qualifications to sit on our Board include his extensive leadership, management and budgeting experience gained while serving as a senior officer in the United States Navy and at EADS, NA, and his valuable corporate governance experience gained while serving as a director for other public and private companies. Mr. Oliver has been a director of our company since September 2006.

Corporate Governance Guidelines

Our Board has adopted corporate governance guidelines to assist in the exercise of its duties and responsibilities and to serve the best interests of AMSC and our stockholders. These guidelines, which provide a framework for the conduct of our Board’s business, provide that:

Board Determination of Independence

Under applicable rules of The Nasdaq Stock Market LLC (the “Nasdaq Rules”), a director will only qualify as an “independent director” if, in the opinion of our Board, that person does not have a relationship that would interfere with the exercise of independent judgment in carrying out the responsibilities of a director. Our Board has determined that each of Ms. Dambier, Mr. Donnelly, Mr. House, Ms. Klein, Ms. Littlefield and Mr. Oliver does not have any relationships that would interfere with the exercise of independent judgment in carrying out the responsibilities of a director and that each of these directors is an “independent director” as defined under Rule 5605(a)(2) of the Nasdaq Rules.

Director Nomination Process

The process followed by our Nominating and Corporate Governance Committee to identify and evaluate director candidates includes requests to Board members and others for recommendations, meetings from time to time to evaluate biographical information and background material relating to potential candidates, and interviews of selected candidates by members of the Nominating and Corporate Governance Committee and our Board.

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In considering whether to recommend any particular candidate for inclusion in our Board’s slate of recommended director nominees, the Nominating and Corporate Governance Committee applies the criteria set forth in our corporate governance guidelines, such as the candidate’s integrity, business acumen, knowledge of our business and industry, experience, interest and ability to understand conflicting interests of our various constituencies and ability to act in the interests of all stockholders. The Nominating and Corporate Governance Committee does not assign specific weights to particular criteria and no particular criterion is a prerequisite for each prospective nominee. We believe that the backgrounds and qualifications of our directors, considered as a group, should provide a composite mix of experience, knowledge and abilities that will allow our Board to fulfill its responsibilities.

Our Nominating and Corporate Governance Committee does not have a formal policy with respect to diversity, but believes that our Board, taken as a whole, should embody a diverse set of skills, experiences and backgrounds. In addition, the Board is committed to attracting highly qualified candidates with diverse backgrounds, skills and experiences as part of each Board search we undertake.

Stockholders may recommend director candidates for consideration by the Nominating and Corporate Governance Committee of our Board by submitting the stockholder’s name, address and number of shares of our stock held, and the candidate’s name, age, address and resume to our Corporate Secretary at American Superconductor Corporation, 114 East Main Street, Ayer, Massachusetts 01432. Our Nominating and Corporate Governance Committee and Board will evaluate stockholder-recommended candidates using the criteria described above. If our Board decides to nominate a stockholder-recommended candidate, then we will include his or her name in the proxy statement and proxy card for the next annual meeting.

Stockholders also have the right under our bylaws to directly nominate director candidates, without any action or recommendation on the part of the Nominating and Corporate Governance Committee or our Board, by following the procedures set forth under “Stockholder Proposals for 2027 Annual Meeting.” Candidates nominated by stockholders in accordance with the procedures set forth in our bylaws will not be included in our proxy statement for the next annual meeting.

Board Meetings and Attendance

Our Board met eleven times during fiscal 2025, either in person or by teleconference. During fiscal 2025, each director attended at least 75% of the aggregate number of Board meetings held during the period for which he or she was a director and meetings held by all committees during the period in which he or she then served.

Director Attendance at Annual Meeting of Stockholders

Each of our then-current directors attended the 2025 Annual Meeting of Stockholders. Our corporate governance guidelines provide that directors are expected to attend the Annual Meeting of Stockholders.

Board Leadership Structure

Mr. McGahn, our chief executive officer, has served as chairman of the Board since July 27, 2018. Our corporate governance guidelines provide the Nominating and Corporate Governance Committee with flexibility to assess our leadership structure on an ongoing basis and determine whether the positions of chief executive officer and chairman of the Board should be separate. Our Board has determined that it is in the best interests of our company and our stockholders to have the same individual serve as chief executive officer and chairman of the Board for the following reasons:

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In the event that the chairman of the Board is not an independent director, our corporate governance guidelines provide that the Nominating and Corporate Governance Committee may recommend an independent director to serve as Lead Director, who shall be approved by a majority of independent directors. The Lead Director has the following duties:

On July 24, 2025, the Nominating and Corporate Governance Committee recommended, and all of our independent directors approved, the appointment of Mr. House as Lead Director. Mr. House will serve as Lead Director until the Annual Meeting.

Board Committees

Our Board has established three standing committees — Audit, Compensation, and Nominating and Corporate Governance — each of which operates under a charter that has been approved by our Board. Current copies of each committee’s charter are posted in the “Corporate Governance” section of the “Investors” page of our website, www.amsc.com. Our Board has determined that all of the members of each of our Board’s three standing committees are independent as defined under the Nasdaq Rules, including, in the case of all members of the Audit Committee, the independence requirements contemplated by Rule 10A-3(c) promulgated under the Securities Exchange Act of 1934, as amended, or the Exchange Act, and, in the case of all members of the Compensation Committee, the independence requirements specific to compensation committee members under the Nasdaq Rules.

Audit Committee

The Audit Committee’s responsibilities include:

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The current members of the Audit Committee are Mr. Oliver (chairman), Ms. Dambier, Mr. Donnelly and Ms. Littlefield. The Audit Committee met four times during fiscal 2025. Our Board has determined that each of Mr. Oliver and Ms. Littlefield is an “audit committee financial expert” as defined in applicable SEC rules.

Compensation Committee

The Compensation Committee’s responsibilities include:

Consistent with the requirements of applicable law and our company’s equity-based plans, the Compensation Committee has the authority to delegate to one or more executive officers of our company the power to grant rights or options to acquire shares of our company’s common stock to employees of our company who are not directors or executive officers of our company.

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The current members of the Compensation Committee are Mr. House (chairman), Ms. Littlefield and Ms. Klein. The Compensation Committee met five times during fiscal 2025.

Nominating and Corporate Governance Committee

The Nominating and Corporate Governance Committee’s responsibilities include:

The current members of the Nominating and Corporate Governance Committee are Mr. House (chairman) and Mr. Oliver. The Nominating and Corporate Governance Committee met three times during fiscal 2025.

Oversight of Risk

Our Board oversees our risk management processes directly and through its committees. Our management is responsible for implementing and supervising risk management processes on a day-to-day basis. Additionally, management discusses strategic and operational risks at regular management meetings and conducts specific strategic planning and review sessions during the year that include a focused discussion and analysis of the risks facing us. Throughout the year, senior management reviews these risks with the Board at regular Board meetings as part of management presentations that focus on particular business segments, functions, operations or strategies, and presents the steps taken by management to mitigate or eliminate such risks. The role of our Board and its committees is to oversee the risk management activities of management. Our Board does not have a standing risk management committee, but rather administers this oversight function directly through the Board as a whole, as well as through various standing committees of the Board that address risks inherent in their respective areas of oversight. In particular, our Board focuses its oversight on risk management activities relating to business strategy, acquisitions, liquidity, organizational structure and certain operational risks. Our Board is responsible for monitoring and assessing strategic risk exposure, including business continuity risks. In accordance with its charter, our Audit Committee discusses policies with respect to our assessment and management of risk (both financial and non-financial, including information security), including guidelines and policies to govern the process by which our exposure to risk is monitored, controlled and reported, and reports regularly to the Board on these matters. Senior management at least annually provides updates to the Audit Committee on our information security risks. Our Compensation Committee oversees risk management activities relating to our compensation policies and practices and management succession planning. Our Nominating and Corporate Governance Committee oversees risk management activities relating to Board composition and ESG matters. Each committee reports to the full Board on a regular basis, including reports with respect to the committee’s risk oversight activities as appropriate. Our Board does not believe that its role in the oversight of our risks affects the Board’s leadership structure.

Executive Compensation Process

The Compensation Committee has implemented an annual performance review program for our executives, under which annual performance objectives are determined and set forth in writing during the first quarter of

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INFORMATION ABOUT EXECUTIVE AND DIRECTOR COMPENSATION

Compensation Discussion and Analysis

Introduction

This Compensation Discussion and Analysis, or CD&A, describes the principles of our executive compensation program, how we applied those principles in compensating our named executive officers for the fiscal year ended March 31, 2026, or fiscal 2025, and how our compensation program drives performance.

Our named executive officers for fiscal 2025 are:

In this CD&A, we first provide an executive summary of our fiscal 2025 accomplishments and financial performance and our compensation program for fiscal 2025. We then describe our compensation philosophy and the objectives of our executive compensation program and how the Compensation Committee of our Board oversees our compensation program. We discuss the compensation determination process and describe how we determine each element of compensation.

Executive Summary

Business Overview

We believe that fiscal 2025 was a year of important and substantial progress towards the successful execution of our strategy of driving revenue growth and enhancing operating results by increasing customer adoption of our products by targeting high-growth segments with commercial and system-level products and establishing what we expect to be a more predictable, re-occurring business. We believe that our executive management team has positioned our company well to continue to execute on our strategy and to respond effectively by (i) continuing to further diversify our base of customers and market geographies for our products and services, (ii) delivering substantially improved operational performance, (iii) identifying and completing opportunistic acquisitions, and (iv) capturing integration synergies and streamlining various functions of the business.

Overview of Fiscal 2025 Accomplishments and Financial Performance

Business Accomplishments

Our strategy is focused on driving revenue growth and enhancing operating results by increasing customer adoption of our products by targeting high-growth segments with commercial and system-level products with the goal of building a sustainably profitable company.

As described in more detail below, we believe that fiscal 2025 was a year of substantial progress towards the successful execution of our strategy and the establishment of what we expect to be a more predictable, re-occurring business.

Fiscal 2025 revenues were $299.2 million, compared to $222.8 million in fiscal 2024. Net income was $133.8 million in fiscal 2025, or $3.12 per share, compared to a net income of $6.0 million in fiscal 2024, or $0.16 per share. In fiscal 2025, we achieved our seventh consecutive quarter of GAAP profitability and our eleventh consecutive quarter of generating operating cash flow.

Our Grid business segment revenues grew 34% to $251.3 million in fiscal 2025, compared to $187.2 million in fiscal 2024. This increase in Grid business segment revenues was driven by organic growth and the contribution from our acquisition of Comtrafo Indústria de Transformadores Elétricos S.A., or Comtrafo, which we completed in December 2025. Comtrafo is a Brazil-based manufacturer of large power and distribution transformers primarily for utility customers and also for industrial customers. The acquisition of Comtrafo directly aligns with our strategic priorities to accelerate profitable growth, broaden our product offerings, and expand market reach and share.

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Grid business segment revenues represented 84% of our total fiscal 2025 revenues. Our Grid business segment alone is now almost 240% more than our entire business was just three fiscal years ago.

During fiscal 2025, our twelve-month backlog grew by over 40% to $282.4 million in fiscal 2025 compared to $200.9 million in fiscal 2024. These orders continue to expand our geographic reach and came from a diverse set of markets including renewables, industrials, utilities and military.

Forward-Looking Statements

This proxy statement contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), including statements regarding our expectation that successful execution of our strategy will establish a more predictable, re-occurring business; and our strategy, goals, products and future plans and prospects. Without limiting the foregoing, the words “believes,” “anticipates,” “plans,” “expects,” “will,” and similar expressions are intended to identify forward-looking statements. Such forward-looking statements represent management’s current expectations and are inherently uncertain. There are a number of important factors that could materially impact the value of our common stock or cause actual results to differ materially from those indicated by such forward-looking statements. Such risks and uncertainties include: If we fail to implement our business strategy successfully, our financial performance could be harmed; We may not realize all of the sales expected from our backlog of orders and contracts; We rely upon third-party suppliers for the components and subassemblies of many of our Grid and Wind products, making us vulnerable to supply shortages and price fluctuations, which could harm our business; We may acquire additional complementary businesses or technologies, which may require us to incur substantial costs for which we may never realize the anticipated benefits; Our business and operations may be materially adversely impacted in the event of a failure or security breach of our or any critical third parties’ IT Systems or Confidential Information; Our contracts with the U.S. and Canadian governments are subject to audit, modification or termination by such governments and include certain other provisions in favor of the governments. The continued funding of such contracts may remain subject to annual legislative appropriation, which, if not approved, could reduce our revenue and lower or eliminate our profit; Changes in U.S. government defense spending could negatively impact our financial position, results of operations, liquidity and overall business; Our performance on contracts with the U.S. Department of Defense may result in restrictions to our ability to repurchase our common stock or U.S. government denial of Foreign Military Sales or ceasing of assistance for international Direct Commercial Sales; Failure to comply with evolving data privacy and data protection laws, regulations, and other obligations, or to otherwise protect personal data, may adversely impact our business and financial results; Our success is dependent upon attracting and retaining qualified personnel and our inability to do so could significantly damage our business and prospects; A significant portion of our Wind segment revenues are derived from a single customer. If this customer’s business is negatively affected, it could adversely impact our business; Our success in addressing the wind energy market is dependent on the manufacturers that license our designs; Many of our revenue opportunities are dependent upon subcontractors and other business collaborators; Problems with product quality or product performance may cause us to incur warranty expenses or product liability charges and may damage our market reputation and prevent us from achieving increased sales and market share; Many of our customers outside of the United States may be either directly or indirectly related to governmental entities, and we could be adversely affected by violations of the United States Foreign Corrupt Practices Act and similar worldwide anti-bribery laws outside the United States; We have had limited success marketing and selling our superconductor products and system-level solutions, including our REG system, and our failure to more broadly market and sell our products and solutions could lower our revenue and cash flow; We or third parties on whom we depend may be adversely affected by natural disasters, including events resulting from climate change, and our business continuity and disaster recovery plans may not adequately protect us or our value chain from such events; Uncertainty surrounding our prospects and financial condition may have an adverse effect on our customer and supplier relationships; Pandemics, epidemics, or other public health crises may adversely impact our business, financial condition and results of operations; Changes in valuation allowance of deferred tax assets may affect our future operating results; If we fail to maintain proper and effective internal control over financial reporting on business acquisitions, our ability to produce accurate and timely financial statements could be impaired and may lead investors and other users to lose confidence in our financial data; We have not been

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historically profitable, and there can be no assurance that we will sustain our recent profitability; We have a history of negative operating cash flows, and we may require additional financing in the future, which may not be available to us; Changes in exchange rates could adversely affect our results of operations; We may be required to issue performance bonds, which restricts our ability to access any cash used as collateral for the bonds; Adverse changes in domestic and global economic conditions could adversely affect our operating results; The ongoing conflict between the United States, Israel, and Iran has disrupted global energy markets and supply chains and could adversely affect our business, financial condition, and results of operations; Our international operations are subject to risks that we do not face in the United States, which could have an adverse effect on our operating results; Our products face competition, which could limit our ability to acquire or retain customers; We have operations in, and depend on sales in, emerging markets, including Latin America and India, and global conditions could negatively affect our operating results or limit our ability to expand our operations outside of these markets. Changes in Brazil’s or India’s political, social, regulatory and economic environment may affect our financial performance; Industry consolidation could result in more powerful competitors and fewer customers; Evolving and varied expectations on environmental sustainability and social initiatives could adversely impact our business and financial results; Growth of the wind energy market depends largely on the availability and size of government subsidies, economic incentives and legislative programs designed to support the growth of wind energy; Lower prices for other energy sources may reduce the demand for wind energy development, which could have a material adverse effect on our ability to grow our Wind business; Our technology and products could infringe intellectual property rights of others, which may require costly litigation and, if we are not successful, could cause us to pay substantial damages and disrupt our business; We may be unable to adequately prevent disclosure of trade secrets and other proprietary information; Our patents may not provide meaningful or long-term protection for our technology, which could result in us losing some or all of our market position; Third parties have or may acquire patents that cover the materials, processes and technologies we use or may use in the future to manufacture our Amperium products, and our success depends on our ability to license such patents or other proprietary rights; There are a number of technological challenges that must be successfully addressed before our superconductor products can gain widespread commercial acceptance, and our inability to address such technological challenges could adversely affect our ability to acquire customers for our products; Our common stock has experienced, and may continue to experience, market price and volume fluctuations, which may prevent our stockholders from selling our common stock at a profit and could lead to costly litigation against us that could divert our management’s attention; Unfavorable results of legal proceedings could have a material adverse effect on our business, operating results and financial condition; and the other important factors discussed under the caption “Risk Factors” in Part 1. Item 1A of our Form 10-K for the fiscal year ended March 31, 2026, and our other reports filed with the SEC, which, among others, could cause actual results to differ materially from those indicated by forward-looking statements made herein. Any such forward-looking statements represent management’s estimates as of the date of this proxy statement. While we may elect to update such forward-looking statements at some point in the future, we disclaim any obligation to do so, even if subsequent events cause our views to change. These forward-looking statements should not be relied upon as representing our views as of any date subsequent to the date of this proxy statement.

Overview of Our Executive Compensation Program

The Compensation Committee of our Board has designed our executive compensation program to attract and retain superior employees in key positions to enable our company to succeed in the highly competitive market for talent, while simultaneously maximizing stockholder value. We intend to continue to provide a competitive compensation package to our executives, tie a significant portion of pay to performance and utilize components that best align the interests of our executives with those of our stockholders.

The following is a summary of important aspects of our executive compensation program discussed later in this CD&A:

Key Elements of Our Compensation Program. Our compensation program is designed to achieve these objectives through a combination of the following types of compensation:

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Each element of our executive compensation program is discussed in greater detail below.

Fiscal 2025 Compensation Programs and Decisions

In line with our executive compensation program’s emphasis on pay for performance, we believe the compensation awarded to our named executive officers for fiscal 2025 properly reflected the achievement of our operating goals, our financial results and overall compensation philosophy:

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We believe that management made substantial progress in fiscal 2025 on our company’s strategy of driving revenue growth and enhancing operating results by increasing customer adoption of our products by targeting high-growth segments with commercial and system-level products and to establish what we expect to be a more predictable, re-occurring business. The Compensation Committee believes that the named executive officers’ fiscal 2025 compensation was appropriate given the performance and steps taken by management to position our company to implement and realize its strategy, as noted by the business accomplishments described above.

Compensation Program Philosophy and Objectives

The Compensation Committee of our Board oversees our executive compensation program, pursuant to authority established in the Compensation Committee Charter. The Compensation Committee reviews and approves all compensation decisions relating to our executive officers, except for the chief executive officer. The Compensation Committee reviews the compensation for our chief executive officer and makes a recommendation to our Board, and our Board then determines the compensation of our chief executive officer.

Our executive compensation program is designed to meet three principal objectives:

These objectives collectively seek to link executive compensation to our overall company performance, which helps to ensure that the interests of our executives are aligned with the interests of our stockholders.

The Compensation Committee’s decisions regarding executive compensation during fiscal 2025 were based on achieving the above objectives, with an emphasis on:

In setting executive compensation for fiscal 2025, the Compensation Committee established salary levels and established an executive incentive cash bonus plan with performance metrics that reflected our annual operating plan and strategic priorities for fiscal 2025. For fiscal 2025, the Compensation Committee used non-GAAP net income and financial objectives relating to revenues and operating expenses as the performance objectives under our executive incentive cash bonus plan to promote our short-term and long-term business success. In setting objectives for each of the foregoing metrics, the Compensation Committee considered multiple factors so that its decisions were informed and equitable and that our executive compensation program achieved its objectives.

Stockholder Say-On-Pay Votes

At our Annual Meeting of Stockholders held on July 25, 2025, we provided our stockholders with the opportunity to cast an advisory vote on executive compensation. Over 91% of the votes cast on the “say on pay” vote at our Annual Meeting of Stockholders held on July 25, 2025 were voted in favor of the proposal. We have considered the results of such vote and believe the support of our stockholders for the vote proposal indicates that our stockholders are generally supportive of our approach to executive compensation. Thus, we did not make material changes to our executive compensation arrangements in response to the vote. In the future, we will continue to consider the outcome of our “say on pay” votes when making compensation decisions regarding our named executive officers. At our Annual Meeting of Stockholders held on August 11, 2023, our stockholders also voted in favor of holding future advisory votes on executive compensation every year. Consistent with this preferred frequency expressed by our stockholders, we expect to hold the “say on pay” vote annually.

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The Compensation Committee’s Process

The Compensation Committee has a process to help ensure that our executive compensation program meets its principal objectives. In making compensation decisions, the Compensation Committee considers a wide variety of information, including how each compensation decision ties to its total compensation philosophy, market data and recommendations provided by the Compensation Committee’s independent compensation consultant, information from our general counsel, who also manages our human resources function and the thoughts of our chief executive officer and other Board members.

The Compensation Committee has engaged Compensia, Inc., or Compensia, since April 2023 as its independent outside compensation consultant. During fiscal 2025, Compensia helped the Compensation Committee develop an executive compensation strategy, assess the competitiveness of our executive compensation and provided recommendations with respect to both the levels and structure of compensation for our executives.

In fiscal 2025, Compensia assessed the competitiveness of executive compensation through comparisons with peer groups and survey sources while additionally assessing our performance to ensure compensation levels were appropriately tied to performance. During fiscal 2025, Compensia advised the Compensation Committee on compensation matters for all officers and directors and met with the Compensation Committee in executive sessions without the presence of management, as requested by the Compensation Committee. Compensia did not perform services for our company that were unrelated to Compensation Committee matters during fiscal 2025.

The Compensation Committee regularly reviews the services provided by its compensation advisers and believes that Compensia is independent in providing executive compensation consulting services. The Committee conducted a specific review of its relationship with Compensia in fiscal 2025 and determined that its work for the Compensation Committee did not raise any conflicts of interest, consistent with the guidance provided under the Dodd-Frank Wall Street Reform and Consumer Protection Act, or the Dodd-Frank Act, and by the SEC and the Nasdaq Global Select Market. The Compensation Committee continues to monitor the independence of its compensation consultant and any conflicts of interest related to services thereby on a periodic basis.

Compensation Analysis. With the assistance of Compensia, in May 2025, the Compensation Committee reviewed the compensation levels of our executive officers against compensation levels at peer group companies that were selected based on the following criteria:

For the analysis of our fiscal 2025 executive compensation packages, the Compensation Committee utilized the peer group approved by the Compensation Committee in January 2025, which consisted of the following seventeen companies:

Peer Group Companies

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This peer group reflects an adjustment from the peer group used for fiscal 2024 compensation decisions to remove Broadwind, Inc., Iteris, Inc., Twin Disc, Inc. and Ultralife Corporation because they no longer fit within the selection criteria described above and to add Aspen Aerogels, Inc., Plug Power Inc., and Powerfleet, Inc. The Compensation Committee utilized the peer group to provide context for its compensation decision-making. The compensation paid by peer group companies to their respective executive officers does not factor into the Compensation Committee’s determination of the peer group. After the peer group companies were selected in January 2025, Compensia prepared and presented a report to the Compensation Committee summarizing the competitive data and comparisons of our executive officers to the comparable company market data utilizing publicly available data from the comparable companies and broad survey data (reflecting companies of similar size in the general and high-technology industries). We use the broad survey data in conjunction with peer group data in evaluating our executive compensation practices. The Compensation Committee does not rely upon data from any individual company participating in any of these surveys in making compensation decisions and uses the general survey data as only a reference point for evaluating our executive compensation practices, as opposed to benchmarking our executive compensation practices against the general survey data. Each of our elements of compensation is reviewed as part of this analysis and evaluation.

The above review provided the Compensation Committee with general affirmation that its compensation decisions are aligned with the marketplace and our compensation program was achieving the Compensation Committee’s objectives, as described above.

The Compensation Committee may, in its discretion, review and/or modify the selection criteria for our peer group and the peer group companies from year to year as it determines appropriate, depending on, among other factors, changes in the marketplace, acquisitions, divestitures and the business focus of us and/or our peer group companies.

Other Compensation Information. Our senior vice president and general counsel, who also manages our human resources function, regularly attended Compensation Committee meetings in fiscal 2025 to provide information regarding our executive compensation program. Among other things, he performed internal analyses of marketplace practices for executive pay, made recommendations to our chief executive officer on compensation matters for all officers (other than our chief executive officer) and compiled other relevant data at the request of the Compensation Committee.

Our chief executive officer is actively involved in the executive compensation process. Our chief executive officer reviews the performance of each of the executive officers (other than his own) and makes recommendations to the Compensation Committee regarding the salary and long-term incentive awards for executive officers other than himself, as well as the executive compensation program’s impact on attracting, retaining and motivating the level of executive talent necessary to achieve and exceed our company goals. The Compensation Committee is not bound by such recommendations, but generally takes them into consideration before making final determinations about the compensation of executive officers other than our chief executive officer.

The Compensation Committee reviews the compensation for our chief executive officer and makes a recommendation to the full Board. The full Board determines the compensation of our chief executive officer.

The Compensation Committee also considers information relevant to each executive’s specific situation including the executive’s marketability and the availability or scarcity of other qualified candidates, inside and outside our company, who could replace the executive should he or she leave our company.

In determining equity compensation, the Compensation Committee considers levels of past performance, performance potential, retention risk and the value of the equity compensation needed to keep the total compensation opportunity level competitive and consistent with our compensation philosophy.

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Risk Considerations in our Compensation Program

Our Compensation Committee does not believe that any risks arising from our compensation policies and practices are reasonably likely to have a material adverse effect on our company. Our Compensation Committee believes that any risks arising from our compensation policies and practices are mitigated by:

Compensation Mix

The Compensation Committee relies upon its judgment and not upon rigid guidelines or formulas in determining the amount and mix of compensation elements for each executive officer. We seek to achieve our executive compensation objectives through the use of four compensation components, which are summarized in the table below. The percentages of total compensation shown in the table below are based on “total” compensation set forth in the Fiscal 2025 Summary Compensation Table.

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While the Compensation Committee independently evaluates each of the compensation components discussed in the above table, it places greater emphasis on the sum of base salary, performance-based annual cash bonuses and long-term equity incentives rather than any one component because of their combined greater potential to influence our named executive officers’ performance. The Compensation Committee believes, and our pay mix is designed to reflect, that a substantial portion of the compensation for our named executive officers should be “at risk” and aligned with our stockholders’ interests.

Base Salary

Base salaries are set once per year as part of the compensation review process. In May 2025, the Compensation Committee reviewed the base salary levels for Messrs. McGahn and Kosiba. The Compensation Committee and the Board (in the case of our chief executive officer) approved, (i) an increase to Mr. McGahn’s base salary from $665,000 to $725,000, and (ii) an increase to Mr. Kosiba’s base salary from $420,000 to $450,000. Such changes to base salary were effective as of May 12, 2025. The base salary increases for each of Mr. McGahn and Mr. Kosiba were based on a review of their respective performance during fiscal 2024 relative to both of their and our company’s goals and competitive salary data provided by our Compensation Committee’s independent compensation consultant, Compensia.

The Compensation Committee considered the base salary levels for these executives to be appropriate in light of each executive’s level of job responsibility and individual performance, overall company performance and the competitiveness of these executives’ salaries with salaries paid to executive officers in similar positions, industries and geographic locations.

Performance-Based Annual Cash Bonuses

The Compensation Committee believes cash bonuses are an important factor in rewarding and motivating our executive officers. The Compensation Committee establishes a cash incentive plan for our executive officers on an annual basis, typically early in the fiscal year.

On May 15, 2025, the Compensation Committee and the Board (in the case of our chief executive officer) approved an executive incentive plan for fiscal 2025 covering all of our executive officers. Under our executive incentive plan for fiscal 2025, the Compensation Committee used non-GAAP net income and other financial objectives relating to revenues and operating expenses as the performance metrics for the payment of cash bonus awards for fiscal 2025. For each executive officer, the Compensation Committee assigned the following weighting to each such metric:

Under the terms of the fiscal 2025 executive incentive plan, the Compensation Committee and the Board (in the case of our chief executive officer) designated for each named executive officer a target cash bonus amount at 70% of base salary for Mr. Kosiba and 100% of base salary for Mr. McGahn. The amount of the cash bonus award paid to each named executive officer could have been less than or greater than the executive’s target cash bonus, with the amount capped at 200% of target. If less than the threshold performance level was achieved for a particular quantitative objective, no payment was received with respect to that objective.

The following table sets forth each named executive officer’s annual cash bonus award opportunities for fiscal 2025 at minimum, threshold, target and maximum:

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The Compensation Committee is responsible for determining the cash payout under the plan to each executive officer other than the chief executive officer. Our Board determines the cash payout under the plan for the chief executive officer, taking into account the recommendation of the Compensation Committee.

The following summarizes the cash bonus opportunity for the named executive officers under each performance metric under the fiscal 2025 executive incentive plan. Comtrafo financial results were excluded for purposes of determining cash payouts under the fiscal 2025 executive incentive plan.

Milestones and achievement for the non-GAAP net income (50%) bonus measure: All of the named executive officers were subject to the same non-GAAP net income milestones that had to be met before payout could be earned. The fiscal 2025 milestones and achievement levels for our company’s non-GAAP net income measure are shown below. An executive’s payout on this measure was determined through a numerical calculation based on our company’s non-GAAP net income so the Compensation Committee (or, in the case of our chief executive officer, our Board) did not apply discretion.

Non-GAAP net income payout results: Our company’s non-GAAP net income for fiscal 2025 exceeded maximum-level performance, resulting in a bonus payout that was 200% of the target bonus opportunity for this measure. The Compensation Committee (or, in the case of our chief executive officer, our Board) awarded bonuses under the non-GAAP net income measure to each named executive officer as follows:

Other financial objectives (50%): For fiscal 2025, the Compensation Committee (or, in the case of our chief executive officer, our Board) continued to place a greater emphasis on the achievement of corporate goals as opposed to individual goals for each executive officer, viewing these corporate goals as key for our company’s short-term sustainability and long-term growth. The Compensation Committee (or, in the case of our chief executive officer, our Board) awarded bonuses under these measures to each named executive officer as follows:

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Overall payout results: In May 2026, the Compensation Committee (or, in the case of our chief executive officer, our Board) approved the following payouts under the fiscal 2025 executive incentive plan:

Long-Term Equity Incentives

The Compensation Committee uses stock-based awards to retain executive officers and align their interests with those of our stockholders. For the last several years, the Compensation Committee awarded both time-based and performance-based restricted stock awards. A time-based restricted stock award typically will vest in equal annual installments over a three-year period. A performance-based restricted stock award typically will vest upon the achievement of specific objectives relating to our performance within a specified period. The Compensation Committee believes shares of restricted stock provide a more motivating form of incentive compensation than stock options, minimize stock compensation expenses and reduce the potential dilution of our shares.

We generally grant shares of restricted stock to executive officers and other employees (i) upon their initial hire, (ii) in connection with a promotion, and (iii) annually based on merit. To determine the amount of stock-based awards granted to executive officers, our Compensation Committee (or, in the case of our chief executive officer, our Board) considers the performance of the individual and our company, historic stock-based awards and the awards made to those in similar positions at comparable companies.

Our Board and Compensation Committee typically meet in or around May to review company performance for the prior fiscal year. At such time, the Compensation Committee (or, in the case of our chief executive officer, our Board) also reviews the performance of the executive officers over the prior fiscal year and grants equity awards, if any, to the executive officers. In fiscal 2025, the Compensation Committee and Board met in May and awarded time-based and performance-based restricted stock awards to Messrs. McGahn and Kosiba under our 2022 Stock Incentive Plan.

In fiscal 2025, when considering equity grants to our executive officers, the Compensation Committee (or, in the case of our chief executive officer, our Board) considered:

Based on such considerations, the Compensation Committee recommended, and the Board awarded shares of time-based restricted stock and performance-based restricted stock to each executive officer. Messrs. McGahn and Kosiba received time-based restricted stock awards of 80,000 and 40,000 shares, respectively, each of which vests over three years in equal annual installments on each of June 2, 2026, June 2, 2027 and June 2, 2028, subject to the executive officer’s continued employment.

Messrs. McGahn and Kosiba also received performance-based restricted stock awards of 160,000 and 80,000 shares, respectively. The performance measure on which vesting of these performance-based shares is contingent relates to our company’s cumulative non-GAAP net income over the three-year period beginning April 1, 2025 and ending March 31, 2028, or the Fiscal 2025-2027 Performance Period. Vesting of these performance-based shares is also subject to the executive officer’s continued employment through the Board’s determination of performance following the end of the Fiscal 2025-2027 Performance Period. The Compensation Committee recommended and the Board approved the application of this performance measure because they believe that such measure is aligned with maximizing long-term stockholder value.

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For these performance-based restricted stock awards, we defined non-GAAP net income as our company’s net income (loss) before stock-based compensation, amortization of acquisition-related intangibles, change in fair value of contingent consideration, and other non-cash or unusual charges, and subject to other adjustments as deemed necessary or advisable by our Board in good faith to achieve the purposes of the award.

These performance-based restricted stock awards will vest based upon our attainment of the performance goal for the Fiscal 2025-2027 Performance Period. If the performance goal is met at maximum performance levels, then each executive officer will earn 100% of the performance-based shares awarded. The amount of performance shares that will vest based on threshold, target or maximum performance, as applicable, is set forth in the table below. When non-GAAP net income performance lands between two goals (for example, between “target” and “maximum”), then the number of performance-based shares that will vest will be calculated on a linear basis (rounded to the nearest whole share).

Board Certification in Fiscal 2025 of Achievement of Performance-Based Restricted Stock Awards

On June 15, 2023, the Compensation Committee and the Board (in the case of our chief executive officer) granted performance-based restricted stock awards of 150,000 and 63,000 shares for Mr. McGahn and Mr. Kosiba, respectively. The performance measure on which vesting of these performance-based shares were contingent related to cumulative organic revenues over the three fiscal year period beginning April 1, 2023 and ending March 31, 2026, or the Fiscal 2023-2025 Performance Period. Vesting of these awards was also subject to the executive officer’s continued employment through the Board’s determination of performance following the end of the Fiscal 2023-2025 Performance Period.

For these performance-based restricted stock awards, we defined cumulative organic revenues as our company’s gross revenues during the Fiscal 2023-2025 Performance Period, excluding the effects of acquired revenues after the date thereof, product discontinuances and divestitures, and subject to other adjustments as deemed necessary or advisable by our Board in good faith to achieve the purposes of the award.

The performance measure and goals pertaining to these performance-based restricted stock awards and the number of shares eligible to vest based on such performance measures and goals were as follows:

On June 1, 2026, our Board certified that actual cumulative organic revenues of $532,321,342 for the Fiscal 2023-2025 Performance Period exceeded the maximum-level cumulative organic revenues amount of $378,000,000, and as a result, (A) all 150,000 of Mr. McGahn’s performance-based shares, and (B) all 63,000 of Mr. Kosiba’s performance-based shares vested.

Benefits

We offer a comprehensive benefits package to all full-time employees, including health and dental insurance, life and disability insurance and a 401(k) plan. Executive officers are eligible to participate in all of our employee benefit plans on the same terms as our other full-time employees generally. The 401(k) plan includes a matching component, pursuant to which we match 100% of an employee’s contribution up to a maximum of 5 percent of his or her wages in the form of our stock. The employee contributions are subject to the maximum limitations as set forth in the Internal Revenue Code of 1986, as amended, or the Code.

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Severance and Change-in-Control Benefits

We have entered into agreements with each of our executive officers that provide them with severance benefits in the event of the termination of their employment under specified circumstances, including termination following a change in control of our company. In addition, the restricted stock awards we grant to our executive officers provide for full acceleration of vesting upon a change in control of our company. These agreements, along with estimates of the value of the benefits payable under them, are described below under the caption “Employment Agreements and Severance Agreements with Executive Officers.” We believe providing these benefits helps us compete for and retain executive talent and that our severance and change-in-control benefits are generally in line with those provided to executives by comparable companies.

Tax Considerations

The Internal Revenue Service, pursuant to Section 162(m) of the Code, generally disallows a tax deduction for all compensation in excess of $1,000,000 paid to certain current or former executive officers at our company. The Compensation Committee believes that stockholder interests are best served by not restricting the committee’s flexibility in structuring compensation plans and reserves the right to pay compensation that will not be deductible as a result of Section 162(m) of the Code.

Prohibitions on Hedging, Pledging and Short Sales

Our Board has adopted an Insider Trading Policy, which applies to all of our directors, officers, including our named executive officers, and employees, certain of their family members and any entities they control. The policy prohibits the purchase of financial instruments such as prepaid variable forward contracts, equity swaps, collars, and exchange funds, or otherwise engaging in transactions that hedge or offset, or are designed to hedge or offset, any decrease in the market value of our company’s equity securities. In addition, the policy prohibits (x) the pledging of our company’s securities as collateral for a loan except in limited circumstances where a person wishes to pledge our company’s securities as collateral for a loan and clearly demonstrates the financial capacity to repay the loan without resort to such pledged company securities, and (y) short sales of our company’s equity securities.

Fiscal 2025 Summary Compensation Table

The following table contains information with respect to the compensation for fiscal 2025 of our principal executive officer and our principal financial officer.

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Grants of Plan-Based Awards Table for Fiscal 2025

The following table contains information concerning potential future payouts under our fiscal 2025 executive incentive plan to the named executive officers. As discussed in “Compensation Discussion and Analysis — Compensation Mix — Long Term Equity Incentives” above, we granted awards of restricted stock to our named executive officers in fiscal 2025.

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Outstanding Equity Awards at Fiscal Year-End Table for Fiscal 2025

The following table contains information regarding unvested restricted stock awards held by our named executive officers as of March 31, 2026.

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Option Exercises and Stock Vested Table for Fiscal 2025

The following table contains information concerning the vesting of restricted stock awards for each named executive officer during fiscal 2025. None of our named executive officers exercised any stock options during fiscal 2025.

Employment Agreements and Severance Agreements with Executive Officers

We are party to severance agreements with each of our named executive officers. Each severance agreement provides for certain severance benefits from the company to the executive in the event that such executive’s employment is terminated:

These benefits consist primarily of the continuation of the executive’s salary and employee benefits for a specified period of time following employment termination. These periods are as follows: Mr. McGahn — 24 months; and Mr. Kosiba — 18 months. In addition, upon termination by us without cause (other than due to death or disability) or by the executive for good reason within 12 months following a change in control of our company, the terminated executive is also entitled to a lump sum payment equal to a prorated portion of his or her target bonus for the year of termination.

The restricted stock awards we grant to our executive officers provide for full acceleration of vesting upon a change in control of our company.

The following table describes the potential payments and benefits that would be received by the named executive officers pursuant to these severance agreements, assuming that a qualifying termination of employment occurred on March 31, 2026. Actual amounts payable to each executive listed below upon his employment termination can only be determined definitively at the time of an executive’s actual termination.

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The following table describes the value to the named executive officers pursuant to the acceleration-of-vesting provisions in his restricted stock awards, assuming that a change in control of our company occurred on March 31, 2026. The actual value of such acceleration to each executive listed below can only be determined definitively at the time of an executive’s actual termination. None of our named executive officers held any options as of March 31, 2026.

Pay Ratio Disclosure

Pursuant to Section 953(b) of the Dodd-Frank Act and Item 402(u) of Regulation S-K, we are required to disclose the ratio of the annual total compensation of our principal executive officer to the annual total compensation of our median employee. During fiscal 2025, the principal executive officer of AMSC was our chairman of the Board, president and chief executive officer, Mr. Daniel P. McGahn. For fiscal 2025, the annual total compensation of Mr. McGahn, for purposes of this pay ratio disclosure, was $7,529,025 and for our median employee was $99,511 resulting in a pay ratio of approximately 76 to 1.

For fiscal 2025 we identified the median employee as of February 28, 2026 by (i) aggregating for each applicable employee, a consistently applied compensation measure consisting of (A) annual base salary for salaried employees (or hourly rate multiplied by actual hours worked, for hourly employees), in each case, annualized with respect to newly hired permanent employees, and (B) target cash bonus compensation, and (ii) ranking this compensation measure for our employees from lowest to highest. This calculation was performed for all employees of AMSC, excluding Mr. McGahn and 580 employees from our December 2025 acquisition of Comtrafo Indústria de Transformadores Elétricos S.A. After identifying the median employee, we calculated the annual total compensation for fiscal 2025 for such employee using the same methodology we used for our named executive officers as set forth in the “Fiscal 2025 Summary Compensation Table” earlier in this section. Neither the Compensation Committee nor our management used our CEO Pay Ratio measure in making compensation decisions.

We consider the pay ratio reported above to be a reasonable estimate, calculated in a manner intended to be consistent with Item 402(u) of Regulation S-K based on our internal records and the methodology described above. Item 402(u) of Regulation S-K allows companies to adopt a variety of methodologies, apply certain exclusions, and make reasonable estimates and assumptions that reflect their employee populations and compensation practices. Therefore, the pay ratio reported by other companies may not be comparable to the pay ratio reported above, as other companies have different employee populations and compensation practices and may utilize different methodologies, exclusions, estimates, and assumptions in calculating their own pay ratios.

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Director Compensation

Our Compensation Committee is responsible for reviewing and making recommendations to our Board with respect to the compensation paid to our non-employee directors.

For fiscal 2025, non-employee directors received cash compensation as follows:

In addition to cash compensation, each non-employee director is granted an award of shares of common stock under the Amended and Restated 2007 Director Plan, or 2007 Director Plan. For fiscal 2025, these awards had an aggregate grant date value equal to $50,000. The annual award is granted three business days following the last day of each fiscal year, and is subject to proration for any partial fiscal year of service. Further, each non-employee director is granted an option to purchase shares of common stock under the 2007 Director Plan with an aggregate grant date value equal to $40,000 upon his or her commencement of service on the Board with an exercise price equal to the fair market value of our common stock on the date of the grant. These options vest in equal annual installments over a two-year period. Each option granted under the 2007 Director Plan becomes exercisable in full in the event of a change in control of the company. The term of each option granted under the 2007 Director Plan is 10 years, provided that, in general, an option may be exercised only while the director continues to serve as a director or within 60 days thereafter.

In May 2025, the Compensation Committee engaged Compensia to assess the competitiveness of our non-employee director equity compensation through comparisons with our peer group and the marketplace, and to provide recommendations with respect to cash compensation for our non-employee directors. On May 15, 2025, based on Compensia’s recommendations, the Compensation Committee recommended, and the Board approved, amendments to our 2007 Director Plan which provide that grant date value of the annual equity award granted to each non-employee director be increased from $50,000 to $100,000. Such amendments shall effect annual equity awards that each non-employee director will be granted beginning in fiscal 2026. Except for such amendments to our 2007 Director Plan, the structure of the compensation for our directors remains the same.

The compensation packages for directors are intended to attract and retain high-quality individuals to provide oversight to our management team. Directors who are employees of the company receive no additional compensation for their service as directors.

Fiscal 2025 Director Compensation Table

During fiscal 2025, we provided the following compensation to our non-employee directors:

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Securities Authorized for Issuance Under Our Equity Compensation Plans

The following table provides information about the securities authorized for issuance under our equity compensation plans as of March 31, 2026.