Every Form 4 that American Superconductor Corp (AMSC) has filed with the SEC in the last 12 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A Form 4 covers the transactions officers, directors and large holders report, so if you follow AMSC and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full AMSC filings page.
AMERICAN SUPERCONDUCTOR CORP /DE/ director Laura A. Dambier sold shares of company stock in an open-market transaction. On the reported date, she sold 4,000 shares of Common Stock at a price of $37.63 per share. According to the footnotes, these sales were made for tax planning purposes.
Following the transaction, the reporting person holds 14,992 shares of Common Stock directly. The filing describes this as a sale in an open market or private transaction and does not show any associated derivative exercises or gifts in this report.
American Superconductor SVP, CFO & Treasurer John W. Kosiba Jr. reported selling 6,769 shares of common stock on June 11, 2026 in two open-market transactions at weighted average prices of $37.33 and $37.85. According to the footnotes, these sales were made to cover tax withholding obligations tied to vesting of restricted stock awards and were executed under a pre-arranged Rule 10b5-1 trading plan. After these transactions, he holds 334,377 shares directly and 371 shares indirectly through the company 401(k) plan as of June 11, 2026.
American Superconductor (AMSC) chairman, president and CEO Daniel P. McGahn sold shares in a planned, tax-related transaction. On June 11, 2026, he sold a total of 16,117 shares of common stock in open-market trades to cover tax withholding obligations tied to vesting restricted stock awards.
The sales were executed at weighted average prices of $37.2825 and $37.8511 per share under a previously established Rule 10b5-1 trading plan adopted on August 15, 2025 and modified on February 26, 2026. After these transactions, he holds 1,131,929 shares directly and 13,344 shares indirectly through the company’s 401(k) plan as of June 11, 2026.
American Superconductor senior vice president, CFO and treasurer John W. Kosiba Jr. reported open-market sales of common stock that were used to cover tax withholding on vesting restricted stock awards. On June 8, 2026, he sold 3,286 shares at a weighted average price of $41.5007 and 1,549 shares at a weighted average price of $42.347, in multiple trades within disclosed price ranges. The transactions were executed under a pre-arranged Rule 10b5-1 trading plan. After these transactions, he holds 341,146 shares directly and 371 shares indirectly through the company’s 401(k) plan as of June 10, 2026.
American Superconductor Corp. Chairman, President and CEO Daniel P. McGahn reported selling a total of 9,670 shares of common stock on June 8, 2026. The sales were made at weighted average prices of $41.3891 and $42.1935 per share in open-market transactions.
According to the filing, these shares were sold to cover tax withholding obligations related to vesting of restricted stock awards and were executed under a previously established Rule 10b5-1 trading plan. After these transactions, McGahn holds 1,148,046 shares directly and 13,344 shares indirectly through the company’s 401(k) plan as of June 10, 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.
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.
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 (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.