American Superconductor

Overview

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• TickerAMSC on Nasdaq¹
• IndustryMotors & Generators¹
• HeadquartersDevens¹
• Websitewww.amsc.com
• Incorporated inDE⁷
• Business addressSixty Four Jackson Road, Devens, Ma 01434⁷
• Filer categoryLarge accelerated filer⁷
• Legal formCorporation⁴
• LEI549300S9YT8Z8LOK4452⁴
• StatusActive⁴
• LEI statusIssued and current⁴
• Registered addressC/O NATIONAL REGISTERED AGENTS, INC., 19801 Wilmington, United States⁴
• Registered withDivision of Corporations, Department of State, 2123041⁴

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American Superconductor Corporation (AMSC) is an American energy technologies company headquartered in Ayer, Massachusetts. The firm specializes in using superconductors for the development of diverse power systems, including but not limited to superconducting wire. The company operates across three primary business segments: production of high-temperature superconductor (HTS) wire, which has a significantly higher electrical current capacity than copper wire; development of HTS-based motors and generators; and design and manufacturing of power electronic systems for wind farms and transmission systems. AMSC employs superconductors in the construction of ship protection systems. The company has a subsidiary, AMSC Windtec, located in Klagenfurt, Austria.³

Corporate structure

American Superconductor sits at the top of its group. 20 entities, 9 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries listed in Exhibit 21 of annual reports filed with the SEC; subsidiaries, stakes and holdings from Wikidata (CC0); major holders from Schedules 13D and 13G. Each entity in the chart links to its source.

What it owns

What American Superconductor reports owning in its annual reports to the SEC: buildings, land and equipment, real estate and locations, investments, intangible assets and inventory, at the end of its latest fiscal year and a year before.

Property and equipment

Investments

Intangibles and goodwill

Inventory

Properties, in its own words

Our corporate headquarters and Grid manufacturing operations are located in a leased 88,000-square-foot facility in Ayer, Massachusetts. Additionally, we have Grid manufacturing operations located in a leased 77,500 square-foot facility in Westminster, Massachusetts, a leased 43,000 square-foot facility in Silesian, Poland, and a leased 125,000 square-foot facility in Cornélio Procópio, Paraná, Brazil, as well as an owned 40,000 square-foot facility in Queensbury, New York, an owned 150,000 square-foot facility in Bordentown, New Jersey, an owned 80,000 square-foot facility in New Milford, Connecticut, an owned 20,000 square-foot facility in Florence, New Jersey, and an owned 632,100 square-foot facility in Cornélio Procópio, Paraná, Brazil.

We also occupy leased facilities located in Australia, Austria, India, Wisconsin, Washington, and the United Kingdom with a combined total of approximately 72,000 square feet of space. These leases have varying expiration dates through October 2030 which can generally be terminated at our request after a six-month advance notice. These locations focus primarily on research and development, sales and/or field service and do not have significant leases or physical presence. We believe all of these facilities are well-maintained and suitable for their intended uses.

Item 2 of the 10-K filed May 27, 2026.¹⁸

The story

From Wikipedia’s article on American Superconductor, shared under CC BY-SA 4.0.⁸

Leadership

Who has led American Superconductor, and when. Pick a name to see everywhere that person has worked.

• Chief executive officerDaniel P. McGahn May 10, 2012 to now¹⁹
• Chief executive officerGregory J. Yurek May 26, 2006 to Oct 13, 2010²⁰
• ChairDaniel P. McGahn Aug 6, 2018 to now²¹
• ChairGregory J. Yurek May 26, 2006 to Oct 13, 2010²⁰
• PresidentDaniel P. McGahn Dec 15, 2009 to now²²
• PresidentGregory J. Yurek May 26, 2006 to Jan 4, 2010²⁰
• Chief financial officerJohn W. Kosiba Jr. Apr 11, 2017 to now²³
• Chief financial officerDavid A. Henry Jul 11, 2007 to Aug 22, 2016²⁴
• Chief financial officerThomas M. Rosa Mar 21, 2006 to Mar 16, 2007²⁵
• Chief operating officerDaniel P. McGahn Dec 15, 2009 to May 24, 2011²²

Subsidiaries and ownership

Subsidiaries

• American Superconductor (Austria)

Subsidiaries (Exhibit 21)

• AMSC Australia Pty Ltd (*) – incorporated in Australia⁹
• AMSC Austria GmbH (*) – incorporated in Austria⁹
• AMSC Husky LLC (*) - formed in Connecticut⁹
• AMSC India Private Limited (*) – incorporated in India⁹
• AMSC United Kingdom Limited (*) – incorporated in the United Kingdom⁹
• ASC Securities Corp. (*) – incorporated in Massachusetts⁹
• American Superconductor Korea Co., Ltd. (*) – incorporated in South Korea⁹
• American Superconductor Romania S.R.L. (*) – incorporated in Romania⁹
• Comtrafo Indústria de Transformadores Elétricos S.A. (wholly-owned subsidiary of Mardin Participações Ltda.) – incorporated in Brazil⁹
• Hunter Industries Inc. (wholly-owned subsidiary of Megatran Industries Inc.) – incorporated in New Jersey⁹
• Infinia Technology Corporation (*) - incorporated in Delaware⁹
• Mardin Participações Ltda. (*) – incorporated in Brazil⁹
• Megatran Industries Inc. (*) – incorporated in New Jersey⁹
• NWL Europe Sp. z o.o. (wholly-owned subsidiary of Megatran Industries Inc.) – incorporated in Poland⁹
• NWL Inc. (wholly-owned subsidiary of Megatran Industries Inc.) – incorporated in New Jersey⁹
• Neeltran, Inc. (*) - incorporated in Connecticut⁹
• Northeast Power Realty, LLC (*) – formed in New York⁹
• Northeast Power Systems, Inc. (*) – incorporated in New York⁹

From Wikidata.¹ The subsidiaries the company lists in Exhibit 21 of its annual report, as filed.

Controversies and legal

From Wikipedia’s article on American Superconductor, shared under CC BY-SA 4.0.⁸

Timeline

1. Sep 21, 20268-K Executive or director change⁴⁹
2. Aug 5, 20268-K Results of operations; Shareholder vote⁵⁰
3. Jun 2, 20268-K Executive or director change⁵¹
4. May 27, 20268-K Results of operations⁵²
5. Feb 17, 20268-K Financial statements and exhibits⁵³
6. Feb 4, 20268-K Results of operations⁵⁴
7. Dec 23, 20258-K Other events⁵⁵
8. Dec 10, 20258-K Entered a material agreement; Completed an acquisition or sale; Unregistered sale of shares⁵⁶
9. Nov 5, 20258-K Results of operations⁵⁷
10. Jul 30, 20258-K Results of operations⁵⁸
11. Jul 29, 20258-K Shareholder vote⁵⁹
12. Jun 11, 20258-K Other events⁶⁰
13. May 10, 2012New chief executive Daniel P. McGahn becomes CEO¹⁹
14. May 26, 2006New chief executive Gregory J. Yurek becomes CEO²⁰
15. 1987Founded Founded¹

Calendar

Coming up

1. Nov 4, 2026Reports results for the quarter ending Sep/2026 A year earlier it reported $0.12 a share, on Nov 5, 2025.⁶¹

When it reported results

1. Aug 5, 2026Reported quarterly or annual results⁵⁰
2. May 27, 2026Reported quarterly or annual results⁵²
3. Feb 4, 2026Reported quarterly or annual results⁵⁴
4. Nov 5, 2025Reported quarterly or annual results⁵⁷
5. Jul 30, 2025Reported quarterly or annual results⁵⁸
6. May 21, 2025Reported quarterly or annual results⁶²
7. Feb 5, 2025Reported quarterly or annual results⁶³
8. Oct 30, 2024Reported quarterly or annual results⁶⁴

Upcoming dates from Nasdaq's calendar; past results from the company's 8-K filings (Item 2.02). The full markets calendar

Filings

235 filings to the SEC since October 2021: 5 annual reports, 15 quarterly reports, 36 major events, 80 insider forms, 26 large holders, 73 other. The latest 20:

1. Sep 21, 20268-K EDGAR
2. Sep 21, 20264 EDGAR
3. Aug 5, 202610-Q EDGAR
4. Aug 5, 20268-K EDGAR
5. Jul 31, 2026SCHEDULE 13G/A EDGAR
6. Jun 18, 2026ARS EDGAR
7. Jun 18, 2026DEFA14A EDGAR
8. Jun 18, 2026DEF 14A EDGAR
9. Jun 12, 20264 EDGAR
10. Jun 11, 2026144 EDGAR
11. Jun 11, 2026144 EDGAR
12. Jun 11, 20264 EDGAR
13. Jun 11, 20264 EDGAR
14. Jun 10, 2026144 EDGAR
15. Jun 10, 20264 EDGAR
16. Jun 10, 20264 EDGAR
17. Jun 8, 2026144 EDGAR
18. Jun 8, 2026144 EDGAR
19. Jun 3, 2026144 EDGAR
20. Jun 3, 2026144 EDGAR

Every filing from the last five years, summarized. The full record is on SEC EDGAR.

Insider trades

43 open-market trades by officers, directors and large owners since October 2021: 4 buys and 39 sales. Grants, option exercises and gifts are left out.

From Forms 4 filed with the SEC.

Major holders

Investors who own more than 5% of the shares must tell the SEC: a 13D if they may seek to influence the company, a 13G if they hold passively.

• VANGUARD CAPITAL MANAGEMENT LLCSCHEDULE 13G/A, 2 filings Apr 29, 2026 to Jul 31, 2026⁶⁵
• VANGUARD GROUP INCSCHEDULE 13G/A, 4 filings Nov 4, 2024 to Mar 26, 2026⁶⁶
• BlackRockSCHEDULE 13G/A, 6 filings Feb 1, 2022 to Apr 17, 2025⁶⁷
• BAILLIE GIFFORD & COSCHEDULE 13G/A, 6 filings Jan 18, 2022 to Feb 12, 2025⁶⁸
• AWM Investment Company, Inc.SC 13G/A, 3 filings Feb 14, 2023 to Aug 9, 2024⁶⁹
• ROYCE & ASSOCIATES LPSC 13G/A, 2 filings Jan 31, 2023 to Jan 30, 2024⁷⁰
• InvescoSC 13G/A, 2 filings Feb 9, 2022 to Feb 8, 2023⁷¹
• Footprints Asset Management & ResearchSC 13G, 1 filing Feb 14, 2022⁷²

Executive pay

What the company paid its top executives, from the summary compensation table in its proxy statement. Total pay includes salary, bonus, stock and option awards and other pay, as the company valued them.

Funding

Where the company's money came from, by calendar year: private offerings filed with the SEC, federal grants, loans, contracts and other assistance from USAspending.gov, and PPP loans from the SBA. Each bar links to the records below.

Federal awards

Obligated amounts from USAspending.gov⁷⁴, by calendar year, 2008–2026, for 2 registered units, including subsidiaries under the same parent. Obligations are what agencies committed, not always what was paid out. Contracts pay for goods and services; grants, loans and direct payments are assistance. Loans are charted at the face value of the loans listed here. An award’s amount below is its lifetime total, and some began before the years charted.

Largest grants

1. Sep 30, 2007$12.7M from Department of Energy: Electricity Delivery And Energy Reliability, Research, Development And Analysis⁷⁵ To AMERICAN SUPERCONDUCTOR CORP Award FC26-07NT43240
2. Sep 30, 2007$6.4M from Department of Energy: Electricity Delivery And Energy Reliability, Research, Development And Analysis⁷⁶ To AMERICAN SUPERCONDUCTOR CORP Award FC26-07NT43243
3. Nov 30, 2015$4.0M from Department of Energy: Advanced Research And Projects Agency - Energy Financial Assistance Progra; Advanced Research Projects Agency - Energy⁷⁷ To AMERICAN SUPERCONDUCTOR CORP Award DEAR0000599
4. Jun 1, 2017$2.6M from Department of Energy: Renewable Energy Research And Development⁷⁸ To AMERICAN SUPERCONDUCTOR CORP Award DEEE0007870
5. Nov 1, 2007$2.0M from National Institute of Standards and Technology: Advanced Technology Program⁷⁹ To AMERICAN SUPERCONDUCTOR CORP Award 70NANB7H7055
6. Sep 1, 2010$1.5M from Department of Energy: Advanced Research And Projects Agency - Energy Financial Assistance Progra; Advanced Research Projects Agency - Energy⁸⁰ To AMERICAN SUPERCONDUCTOR CORP Award DEAR0000487
7. Jan 1, 2012$1.3M from Department of Energy: Advanced Research And Projects Agency - Energy Financial Assistance Progra; Advanced Research Projects Agency - Energy⁸¹ To AMERICAN SUPERCONDUCTOR CORP Award DEAR0000190
8. May 1, 2013$622.6K from Department of Energy: Advanced Research Projects Agency - Energy⁸² To INFINIA TECHNOLOGY CORPORATION Award DEAR0000368

Largest contracts

1. Jan 12, 2021$10.5M from Department of the Navy: Material, engineering and technical services in support of high temperature superconducting (hts) degaussing systems⁸³ To AMERICAN SUPERCONDUCTOR CORP Award N6449821F4035
2. Sep 29, 2003$6.8M from Department of the Air Force: Afrl/mlkt manufacturing tech american superconductor corpor two technology drive westborough ma westborough worcester mass rdte/manufacturin⁸⁴ To AMERICAN SUPERCONDUCTOR CORP Award F3361503C5504
3. Oct 13, 2006$6.5M from Defense Contract Management Agency: Engineering services⁸⁵ To AMERICAN SUPERCONDUCTOR CORP Award N0002407C4008
4. Dec 19, 2019$5.2M from Defense Contract Management Agency: Hts cryocooler assembly 3004234⁸⁶ To AMERICAN SUPERCONDUCTOR CORP Award N6449820F5004
5. Sep 24, 2025$4.8M from Department of the Navy: Hts motor phase i, ii & iii⁸⁷ To AMERICAN SUPERCONDUCTOR CORP Award N0002425C4113

PPP loans

Paycheck Protection Program loans of $150,000 and up, approved April 2020 to July 2021, from the SBA⁸⁸. Matched to this company by name and state.

1. Apr 3, 2020$2.6M PPP loan (first draw) from Main Street Bank⁸⁸To AMERICAN SUPERCONDUCTOR CORPORATION, Ayer MA; no forgiveness recorded

Held by these funds

The largest holders among investment managers' 13F reports for the quarter ending Jun 30, 2026, the top 25 of 100. Change is in shares since the quarter before.

13F reports cover disclosed long positions in U.S. stocks only.

SEC filer profile

How American Superconductor is registered with the Securities and Exchange Commission, from its EDGAR record and the cover page of its latest annual report.

• Name on EDGARAMERICAN SUPERCONDUCTOR CORP /DE/²
• CIK0000880807
• Employer ID (EIN)04-2959321¹⁸
• Filer statusLarge accelerated filer not an emerging growth company; not a smaller reporting company; not a shell company¹⁸
• Incorporated inDelaware¹⁸
• Fiscal year endsMarch 31²
• Industry code (SIC)3621 Motors & Generators²
• SEC reviewing officeOffice of Manufacturing, Division of Corporation Finance²
• Business addressSixty Four Jackson Road, Devens, MA 01434²
• Phone9788423000²
• Shares outstanding48,442,143 as of Jul 31, 2026¹⁶
• Public float$2.6B as of Sep 30, 2025¹⁸
• AuditorRSM US LLP, Boston, MA PCAOB ID 49; it also attests to the company’s internal control over financial reporting¹⁸
• On EDGAR sinceJul 29, 1996²
• Filings1,326 in all: 4 (513), 8-K (252), 10-Q (91), SC 13G/A (63), SC 13G (39), DEF 14A (32), 10-K (30), 144 (29)²
  All 49 form types

  CT ORDER (26), 3 (22), 424B5 (19), DEFA14A (19), S-3 (17), S-8 (16), ARS (14), EFFECT (14), SD (13), S-3/A (12), 8-K/A (10), 10-K/A (7), SCHEDULE 13G/A (7), 4/A (6), 5 (6), CORRESP (6), PRE 14A (6), S-8 POS (6), SC 13D/A (6), 424B1 (5), UPLOAD (5), POS AM (4), SC 13D (4), 424B7 (3), S-3ASR (3), 10-Q/A (2), 3/A (2), 424B3 (2), 8-A12G/A (2), S-3MEF (2), 424B2 (1), 424B4 (1), 8-A12G (1), D (1), DEFR14A (1), FWP (1), NT 10-K (1), NT 10-Q (1), POSASR (1), S-1 (1), SCHEDULE 13G (1)

• Latest filingsAnnual report (10-K) May 27, 2026
  Quarterly report (10-Q) Aug 5, 2026
  Proxy statement (DEF 14A) Jun 18, 2026
  Latest 8-K (8-K) Sep 21, 2026

Securities registered for trading

From the cover page of the 10-K filed May 27, 2026 (Section 12(b) of the Exchange Act).¹⁸

Risk factors and legal proceedings

The risks American Superconductor names in Item 1A of its 10-K filed May 27, 2026: 41 risks under these headings, as written.¹⁸

• Risks Related to Our Operations
• 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.

Legal proceedings

We are not party to any material legal proceedings.

The opening of Item 3, Legal Proceedings.¹⁸

Links

• Websitewww.amsc.com¹
• WikipediaAmerican Superconductor
• WikidataQ2843029
• SEC EDGARCIK 880807