Welcome to our dedicated page for American Superconductor SEC filings (Ticker: AMSC), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
American Superconductor Corp. filings document the company’s operating results, material events, acquisition accounting, governance matters and common-stockholder votes. Recent Form 8-K reports include Item 2.02 disclosures for quarterly financial results and related press-release exhibits, showing how AMSC reports revenue, profitability, outlook and financial condition to the market.
The filing record also includes acquisition-related 8-K/A disclosure for Comtrafo, with audited and interim financial statements and unaudited pro forma condensed consolidated financial information. Governance filings cover annual meeting results, including director elections, auditor ratification and advisory executive-compensation voting, reflecting formal stockholder oversight of the company’s board and public-company reporting structure.
Morgan Stanley Smith Barney LLC submitted a Rule 144 notice reporting a proposed sale of 12,893 shares of Common Stock held as Restricted Stock, dated 06/02/2026. The filing shows prior sales of 72,525 shares during the past three months and lists Daniel McGahn as the holder.
AMSC: A Form 144 notice reports a proposed sale of 6,447 shares of Common Stock identified as restricted stock, dated 06/02/2026. The filing names John Kosiba and Morgan Stanley Smith Barney LLC as the broker/placement agent.
The excerpt also shows 30,462 shares of Common Stock were sold in the past three months on 06/02/2026 for an aggregate amount of $1,546,485.68. Shares outstanding are listed as 47,694,445 as of 06/03/2026.
American Superconductor (AMSC) SVP, CFO & Treasurer John W. Kosiba Jr. reported both a stock grant and planned share sales. On June 1, 2026, he received a restricted stock award of 30,000 common shares, which will vest in three equal annual installments beginning June 10, 2027.
On June 2–3, 2026, he sold 36,909 common shares in multiple open-market transactions at weighted average prices around the high-$40s to low-$50s per share. A footnote states these sales were made to cover tax withholding obligations related to vesting of restricted stock awards and were executed under a pre-arranged Rule 10b5-1 trading plan adopted on August 15, 2025. After these transactions, he holds 345,981 common shares directly and 320 shares indirectly through the company’s 401(k) plan as of June 3, 2026.
AMERICAN SUPERCONDUCTOR CORP (AMSC) chairman, president and CEO Daniel P. McGahn reported both a stock grant and related share sales. On June 1, 2026, he received a restricted stock award of 60,000 common shares that will vest in three equal annual installments beginning on June 10, 2027.
On June 2–3, 2026, he sold 85,418 common shares in open-market transactions. A footnote states these sales were made to cover tax withholding obligations tied to vesting of restricted stock awards and were executed under a previously adopted Rule 10b5-1 trading plan. After these transactions, he holds 1,157,716 shares directly and 13,262 shares indirectly through the company’s 401(k) plan as of June 3, 2026.
American Superconductor Corporation approved a Fiscal 2026 Executive Incentive Plan for the fiscal year ending March 31, 2027. The plan covers the chief executive officer and all current executive officers, providing annual cash bonuses based on performance against defined factors and weightings.
Each executive has a target cash incentive set as a percentage of base salary, with actual payouts ranging from zero up to 200% of the target. The chief executive officer’s target incentive is 100% of base salary, or $754,000, while the chief financial officer’s target is 75% of base salary, or $351,000. The Compensation Committee determines payouts for executives other than the CEO, and the Board sets the CEO’s payout based on the Committee’s recommendation.
American Superconductor Corporation reports a year of profitable growth driven by grid, industrial and naval power solutions and two acquisitions. It bought Brazil-based transformer maker Comtrafo in December 2025 and U.S. power conversion group Megatran/NWL in August 2024, expanding its Grid segment.
The company estimates an annual addressable market of over $15 billion, supported by $2.3 trillion of 2025 global energy-transition investment and rising U.S. defense and shipbuilding spending. International sales are significant, with 52% of fiscal 2025 revenue coming from outside the United States and notable customer concentration with Inox in its Wind segment.
AMSC ended March 31, 2026 with $147.6 million in cash, cash equivalents and restricted cash and generated $23.1 million of operating cash flow. It released a $118.4 million deferred tax valuation allowance after achieving profitability but disclosed a material weakness in controls over acquisition accounting, which management is working to remediate.
American Superconductor (AMSC) reported strong growth for the fourth quarter and fiscal year ended March 31, 2026. Fourth-quarter revenue rose to $86.4 million from $66.7 million, with GAAP net income increasing to $4.5 million, or $0.10 per share. Non-GAAP net income for the quarter climbed to $14.1 million, or $0.31 per share.
For fiscal 2025, revenue grew 34% year over year to a recent record of $299.2 million, driven by higher Grid and Wind sales and contributions from the Comtrafo acquisition. Full-year GAAP net income was $133.8 million, or $3.12 per share, largely reflecting a substantial non-cash tax benefit from releasing most of the valuation allowance on deferred tax assets. Full-year non-GAAP net income rose to $158.1 million, or $3.68 per share.
AMSC ended March 31, 2026 with $147.6 million in cash, cash equivalents and restricted cash and a 12‑month backlog of approximately $280 million, nearly 40% higher year over year. For the quarter ending June 30, 2026, the company expects revenue to exceed $85 million, GAAP net income to exceed $3.0 million, and non-GAAP net income to exceed $8.0 million, or $0.17 per share.
American Superconductor Corp disclosure: Vanguard Capital Management reports beneficial ownership of 2,384,736 shares of Common Stock, representing 5% of the class. The filing states Vanguard has sole dispositive power over 2,384,736 shares and sole voting power over 345,268 shares. The statement identifies affiliated Vanguard entities that exercise dispositive or voting power on behalf of funds and managed accounts. The filing is signed by a Vanguard officer on 04/29/2026.