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.
American Superconductor Corp. director David R. Oliver Jr. reported an open-market sale of common stock. On February 24, 2026, he sold 200 shares of American Superconductor common stock at a price of $34.10 per share in a sale classified as an open-market transaction.
According to the filing footnotes, these sales were made by the reporting person for tax planning purposes. After completing the reported transaction, Oliver directly holds 60,707 shares of American Superconductor common stock.
American Superconductor Corporation filed an amended current report to add detailed financial information for its newly acquired Brazilian business, Comtrafo Indústria de Transformadores Elétricos S.A. Comtrafo’s audited 2024 results show revenue of R$ 365,141 thousand and profit of R$ 63,552 thousand, with total assets of R$ 493,431 thousand and shareholders’ equity of R$ 251,702 thousand. The business held cash and cash equivalents of R$ 115,990 thousand and loans and borrowings of R$ 83,951 thousand as of December 31, 2024. The filing also includes unaudited interim results for the nine months ended September 30, 2025, where Comtrafo generated revenue of R$ 276,563 thousand and profit of R$ 10,001 thousand. KPMG issued a qualified opinion on the 2024 financials solely because they omit comparative prior‑period figures. AMSC provides unaudited pro forma condensed consolidated financial statements to illustrate the combined company after the Comtrafo acquisition.
American Superconductor Corporation (AMSC) reported much stronger results for the quarter and nine months ended December 31, 2025, helped by acquisitions and a major tax valuation change. Quarterly revenue rose to $74.5 million from $61.4 million, driving operating income up to $3.4 million from $1.3 million.
For the nine-month period, revenue increased to $212.7 million from $156.2 million, and net income jumped to $129.3 million from $4.8 million, largely due to a non‑cash income tax benefit of $112.1 million from releasing most of the deferred tax valuation allowance. Cash, cash equivalents and restricted cash reached $147.1 million, supported by a public equity offering that generated about $124.5 million in net proceeds.
AMSC closed the $202.7 million Comtrafo acquisition in Brazil and previously completed the $61.4 million NWL acquisition, adding goodwill and intangibles but also new revenue streams in the Grid segment. Shares outstanding were 47,612,285 as of January 30, 2026.
American Superconductor Corporation filed a current report to announce its financial results for the third quarter of its fiscal year 2025, which ended on December 31, 2025. The company released these results through a press release dated February 4, 2026, furnished as Exhibit 99.1.
The press release is provided as supplemental information and is expressly furnished, not filed, meaning it is not subject to certain Exchange Act liabilities and is not automatically incorporated into other securities law filings unless specifically referenced.
The Vanguard Group has filed an amended beneficial ownership report on American Superconductor Corp, disclosing ownership of 3,526,632 shares of common stock, representing 7.4% of the class as of 12/31/2025.
Vanguard reports no sole voting or dispositive power, but shared voting power over 364,254 shares and shared dispositive power over 3,526,632 shares. Vanguard states that its clients, including registered investment companies and other managed accounts, are entitled to dividends and sale proceeds, and that no other single person has an interest in more than 5% of the shares reported.
The filing also notes an internal realignment effective January 12, 2026, after which certain Vanguard subsidiaries or business divisions are expected to report beneficial ownership separately, while pursuing the same investment strategies as before. Vanguard certifies that the shares are held in the ordinary course of business and not for the purpose of changing or influencing control of American Superconductor.
American Superconductor (AMSC) Director reported a purchase of common stock. On 06/18/2019, the reporting person bought 200 shares at $8.33 per share (transaction code P). Following this transaction, the reporting person beneficially owns 60,907 shares, held directly.
American Superconductor (AMSC) reported Q2 FY2026 results with revenue of $65,862,000, up from $54,471,000 a year ago. Gross margin was $20,439,000 versus $15,613,000, and operating income reached $2,965,000 compared with a loss of $753,000 last year. Net income was $4,750,000, near last year’s $4,887,000; year‑to‑date net income rose to $11,474,000 from $2,363,000.
Cash and cash equivalents increased to $212,891,000 from $79,494,000 at March 31, 2025, supported by $124,577,000 of net proceeds from a public equity offering. Current deferred revenue declined to $52,157,000 from $66,797,000. The company reported remaining performance obligations of $209,500,000 expected over the next twelve months and $78,200,000 over thirteen to sixty months.
By segment, Grid delivered $54,342,000 and Wind $11,520,000 in revenue, with segment operating income of $1,278,000 and $1,687,000 respectively. NWL contributed $16,400,000 of revenue and $2,000,000 of net income in the quarter. Shares outstanding were 45,186,789 as of October 31, 2025.
American Superconductor Corporation furnished an 8-K to report that it announced its financial results for the second quarter ended September 30, 2025 of its fiscal year 2025. The detailed results are provided in a press release attached as Exhibit 99.1, which is described as furnished, not filed, under the Exchange Act. The filing also includes an exhibit for the cover page Inline XBRL data.
American Superconductor Corp (AMSC) filed a Form 144 reporting a proposed sale of 9,703 shares of Class A common stock through UBS Financial Services on Nasdaq with an aggregate market value of $493,451. The shares were acquired on 09/20/2016 via a non-qualified stock option issued by the company, and payment for the proposed sale is to be made by wire transfer. The filing lists 45,160,926 shares outstanding and shows no securities sold in the past three months by the seller. The filer also affirms they do not possess undisclosed material information about the issuer.
Arthur H. House, a director of American Superconductor Corporation (AMSC), filed a Form 4 reporting stock option-related activity and an open-market sale. The filing shows a transaction dated 08/06/2025 related to a $6.80 exercise-price stock option covering 9,703 shares and a sale on 08/08/2025 of 9,703 common shares at $50.9205 per share. The Form 4 states the shares were sold for tax and estate planning purposes. Following these transactions the reporting person directly holds 48,663 shares. The filing also references the Amended and Restated 2007 Director Stock Plan and provides vesting/grant timing for the option.