Reported relationships
Latest disclosed role at each company.
No relationships currently tracked through insider filings.
Disclosed balances
About these balances
Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.
No balances currently tracked through insider filings.
Past disclosures · reporting ended (1)
No longer tracked through insider filings. These historical balances do not imply present ownership or a zero position.
AMERICAN SUPERCONDUCTOR CORP /DE/
Report date September 18, 2026 · Filed September 21, 2026
Section 16 reporting ended · disclosed 2026-09-21. Current position is not established by this disclosure.
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Common StockSEC Table I · non-derivative | Direct | 37,034 |
Reported balance
After 2026-09-18 transaction · row 1
Account or security details depend on footnotes; rows are not merged.
1 source rowRow 1 · 2026-09-18 · Grant · Acquired 1,607 · Balance 37,034 F1: This award of immediately vested shares of American Superconductor Corporation (the "Company") common stock was made in connection with Ms. Littlefield's departure from the Company's Board in accordance with the Company's Amended and Restated 2007 Director Stock Plan, as Amended. F2: Following all the transactions reported on this Form 4, the reporting person holds 37,034 shares directly. |
Filing footnotes · ownership attribution and instrument terms
F1: This award of immediately vested shares of American Superconductor Corporation (the "Company") common stock was made in connection with Ms. Littlefield's departure from the Company's Board in accordance with the Company's Amended and Restated 2007 Director Stock Plan, as Amended.
F2: Following all the transactions reported on this Form 4, the reporting person holds 37,034 shares directly.
Transaction history
JSON APIPurchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”
The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.
| Transaction date | Company | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| September 18, 2026 Filed Sep 21, 2026 21:22 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | GrantCommon Stock | 1,607 | $0.00 | $0.00 |
DisclosureSEC source: 0001193125-26-396831 · ownership.xml · nonDerivative · entry 1 Littlefield Barbara G. · CIK 0001777725 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 37,034 F1 · date: This award of immediately vested shares of American Superconductor Corporation (the "Company") common stock was made in connection with Ms. Littlefield's departure from the Company's Board in accordance with the Company's Amended and Restated 2007 Director Stock Plan, as Amended. F2 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 37,034 shares directly. Read SEC document |
| April 03, 2026 Filed Apr 7, 2026 21:40 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | GrantCommon Stock | 3,116 | $0.00 | $0.00 |
DisclosureSEC source: 0001193125-26-145803 · ownership.xml · nonDerivative · entry 1 Littlefield Barbara G. · CIK 0001777725 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 35,427 F1 · date: This award of immediately vested shares of American Superconductor Corporation (the "Company") common stock was made in accordance with the Company's Amended and Restated 2007 Director Stock Plan, as Amended. F2 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 35,427 shares directly. Read SEC document |
| April 03, 2025 Filed Apr 4, 2025 20:34 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | GrantCommon Stock | 2,639 | $0.00 | $0.00 |
DisclosureSEC source: 0000950170-25-051187 · ownership.xml · nonDerivative · entry 1 Littlefield Barbara G. · CIK 0001777725 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 32,311 F1 · date: This award of immediately vested shares of American Superconductor Corporation (the "Company") common stock was made in accordance with the Company's Amended and Restated 2007 Director Stock Plan, as Amended. F2 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 32,311 shares directly. Read SEC document |
| April 03, 2024 Filed Apr 4, 2024 21:21 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | GrantCommon Stock | 3,840 | $0.00 | $0.00 |
DisclosureSEC source: 0000950170-24-041901 · ownership.xml · nonDerivative · entry 1 Littlefield Barbara G. · CIK 0001777725 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 29,672 F1 · date: This award of immediately vested shares of American Superconductor Corporation (the "Company") common stock was made in accordance with the Company's Amended and Restated 2007 Director Stock Plan. F2 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 29,672 shares directly. Read SEC document |
| April 05, 2023 Filed Apr 7, 2023 20:13 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | GrantCommon Stock | 11,627 | $0.00 | $0.00 |
DisclosureSEC source: 0001209191-23-023766 · doc4.xml · nonDerivative · entry 1 Littlefield Barbara G. · CIK 0001777725 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 25,832 F1 · date: This award of immediately vested shares of American Superconductor Corporation (the "Company") common stock was made in accordance with the Company's Amended and Restated 2007 Director Stock Plan. F2 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 25,832 shares directly. Read SEC document |
| April 05, 2022 Filed Apr 6, 2022 21:33 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | GrantCommon Stock | 6,067 | $0.00 | $0.00 |
DisclosureSEC source: 0001209191-22-023530 · doc4.xml · nonDerivative · entry 1 Littlefield Barbara G. · CIK 0001777725 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 14,205 F1 · date: This award of immediately vested shares of American Superconductor Corporation (the "Company") common stock was made in accordance with the Company's Amended and Restated 2007 Director Stock Plan. F2 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 14,205 shares directly. Read SEC document |
| April 05, 2021 Filed Apr 7, 2021 17:30 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | GrantCommon Stock | 2,073 | $0.00 | $0.00 |
DisclosureSEC source: 0001209191-21-025805 · doc4.xml · nonDerivative · entry 1 Littlefield Barbara G. · CIK 0001777725 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 8,138 F1 · date: This award of immediately vested shares of American Superconductor Corporation (the "Company") common stock was made in accordance with the Company's Amended and Restated 2007 Director Stock Plan. F2 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 8,138 shares directly. Read SEC document |
| April 03, 2020 Filed Apr 7, 2020 19:32 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | GrantCommon Stock | 6,065 | $0.00 | $0.00 |
DisclosureSEC source: 0001209191-20-023747 · doc4.xml · nonDerivative · entry 1 Littlefield Barbara G. · CIK 0001777725 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 6,065 F1 · date: This award of immediately vested shares of American Superconductor Corporation (the "Company") common stock was made in accordance with the Company's Amended and Restated 2007 Director Stock Plan. F2 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 6,065 shares directly. Read SEC document |
| May 24, 2019 Filed May 29, 2019 21:35 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | GrantStock Options (Right to Buy) · Derivative | 5,939 | $0.00 Strike: $10.68 | $0.00 |
DisclosureSEC source: 0001209191-19-033254 · doc4.xml · derivative · entry 1 Littlefield Barbara G. · CIK 0001777725 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 5,939 Underlying: Common Stock · 5,939 shares Expires 2029-05-24 F1 · derivative.exercise_date: The option vests in two equal annual installments beginning May 24, 2020. Read SEC document |
Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.