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.
The American Superconductor Corporation (AMSC) SEC filings page on Stock Titan brings together the company’s U.S. regulatory disclosures, including current reports on Form 8-K and other key documents filed with the Securities and Exchange Commission. As a Nasdaq-listed issuer, AMSC uses these filings to report material events, financial results and stockholder meeting outcomes.
AMSC’s recent Form 8-K filings include items reporting quarterly financial results for its fiscal 2025 first and second quarters, where the company furnished press releases detailing revenue, net income, segment performance for its Grid and Wind businesses, and management’s business outlook. Another Form 8-K describes the results of the company’s annual meeting of stockholders, including director elections, auditor ratification and advisory votes on executive compensation.
Through its registration statements and prospectus supplements, AMSC also discloses public offerings of common stock, including offering size, pricing and intended use of proceeds for working capital, general corporate purposes and potential strategic acquisitions. These securities filings provide context for investors tracking the company’s capital structure and financing activities.
On Stock Titan, users can access AMSC filings as they are made available from the SEC’s EDGAR system and can use AI-powered summaries to interpret complex documents. These tools help explain the significance of items such as earnings-related 8-Ks, annual reports on Form 10-K, quarterly reports on Form 10-Q and insider transaction reports on Form 4, where applicable.
For those researching AMSC’s Gridtec, Marinetec and Windtec businesses, the filings page offers a structured way to review the company’s official financial disclosures, risk factor discussions and governance information. By combining real-time updates with AI-generated explanations, Stock Titan aims to make AMSC’s regulatory history easier to read and compare across reporting periods.
Donnelly Terence Robert reported acquisition or exercise transactions in this Form 4 filing.
American Superconductor Corporation director Terence Robert Donnelly received an equity award of company stock. On April 3, 2026, he was granted 2,665 shares of common stock at no cash cost as an immediately vested award under the company’s Amended and Restated 2007 Director Stock Plan. Following this grant, he directly holds 2,665 shares of American Superconductor common stock.
OLIVER DAVID R JR reported acquisition or exercise transactions in this Form 4 filing.
American Superconductor director David R. Oliver Jr. received a grant of 3,116 shares of Common Stock on April 3, 2026. The shares were awarded at a price of $0.00 per share, reflecting a stock-based compensation grant rather than a market purchase.
According to the footnotes, this award consisted of immediately vested shares made under the company’s Amended and Restated 2007 Director Stock Plan. Following this grant, Oliver directly holds 63,823 shares of American Superconductor common stock.
Littlefield Barbara G. reported acquisition or exercise transactions in this Form 4 filing.
American Superconductor (AMSC) director Barbara G. Littlefield received a grant of 3,116 shares of common stock as compensation. The shares were immediately vested and were awarded under the company’s Amended and Restated 2007 Director Stock Plan, as amended. Following this grant, she directly holds 35,427 shares of AMSC common stock.
Klein Margaret D. reported acquisition or exercise transactions in this Form 4 filing.
AMERICAN SUPERCONDUCTOR CORP director Margaret D. Klein received a grant of 3,116 shares of common stock on April 3, 2026 at $0.00 per share. The award vested immediately and was made under the company’s Amended and Restated 2007 Director Stock Plan.
After this compensation grant, she holds 19,492 shares of common stock directly. This is not an open-market purchase or sale but a stock-based director compensation award.
House Arthur H reported acquisition or exercise transactions in this Form 4 filing.
AMERICAN SUPERCONDUCTOR CORP director Arthur H. House received a stock grant of 3,116 common shares as compensation. The award consisted of immediately vested shares issued at no cash cost to him under the company’s Amended and Restated 2007 Director Stock Plan. Following this grant, he directly holds 51,779 shares of AMERICAN SUPERCONDUCTOR common stock.
Dambier Laura A. reported acquisition or exercise transactions in this Form 4 filing.
American Superconductor (AMSC) director Laura A. Dambier received an equity grant of 3,116 shares of common stock. The shares were awarded at no cash cost to her and vested immediately under the company’s Amended and Restated 2007 Director Stock Plan.
After this grant, she directly holds 18,992 American Superconductor common shares, reflecting routine stock-based compensation for board service rather than an open-market purchase or sale.
The Vanguard Group filed an amendment reporting 0% beneficial ownership of American Superconductor Corp common stock. The filing states that, on January 12, 2026, certain Vanguard subsidiaries were disaggregated for reporting in accordance with SEC Release No. 34-39538 (January 12, 1998), and those entities now report separately.
The amendment lists amount beneficially owned: 0 and percent of class: 0%. The filing is signed by Vanguard's Head of Global Fund Administration on 03/26/2026.
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.