Reported relationships
Latest disclosed role at each company.
| Company | Last reported as | Report date | Published |
|---|---|---|---|
| AMERICAN SUPERCONDUCTOR CORP /DE/AMSC · Entity 4752 | Director | April 03, 2026 | April 07, 2026 |
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.
AMERICAN SUPERCONDUCTOR CORP /DE/
Report date April 03, 2026 · Filed April 07, 2026
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Common StockSEC Table I · non-derivative | Direct | 51,779 |
Reported balance
After 2026-04-03 transaction · row 1
Account or security details depend on footnotes; rows are not merged.
1 source rowRow 1 · 2026-04-03 · Grant · Acquired 3,116 · Balance 51,779 F1: 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: Following all the transactions reported on this Form 4, the reporting person holds 51,779 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 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 51,779 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 |
|---|---|---|---|---|---|---|
| April 03, 2026 Filed Apr 7, 2026 21:35 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | GrantCommon Stock | 3,116 | $0.00 | $0.00 |
DisclosureSEC source: 0001193125-26-145795 · ownership.xml · nonDerivative · entry 1 House Arthur H · CIK 0001685155 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 51,779 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 51,779 shares directly. Read SEC document |
| August 08, 2025 Filed Aug 8, 2025 20:15 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | SaleCommon Stock | 9,703 | $50.92 | $494,081.61 |
DisclosureSEC source: 0000950170-25-105858 · ownership.xml · nonDerivative · entry 2 House Arthur H · CIK 0001685155 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 48,663 F1 · kind: The sales reported on this Form 4 were made by the reporting person for tax and estate planning purposes. F2 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 48,663 shares directly. Read SEC document |
| August 06, 2025 Filed Aug 8, 2025 20:15 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | Exercise / conversionStock Options (Right to Buy) · Derivative | 9,703 | $0.00 Strike: $6.80 | $0.00 |
DisclosureSEC source: 0000950170-25-105858 · ownership.xml · derivative · entry 3 House Arthur H · CIK 0001685155 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 9,703 shares Expires 2026-09-20 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F3 · derivative.exercise_date: The stock option was automatically granted under the Amended and Restated 2007 Director Stock Plan on the third business day following the reporting person's election to the Board. The stock option vested in two equal annual installments beginning September 20, 2017, and became fully vested and exerciseable on September 20, 2018. Read SEC document |
| August 06, 2025 Filed Aug 8, 2025 20:15 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | Exercise / conversionCommon Stock | 9,703 | $6.80 | $65,980.40 |
DisclosureSEC source: 0000950170-25-105858 · ownership.xml · nonDerivative · entry 1 House Arthur H · CIK 0001685155 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 58,366 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. Read SEC document |
| April 03, 2025 Filed Apr 4, 2025 20:30 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | GrantCommon Stock | 2,639 | $0.00 | $0.00 |
DisclosureSEC source: 0000950170-25-051183 · ownership.xml · nonDerivative · entry 1 House Arthur H · CIK 0001685155 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 48,663 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 48,663 shares directly. Read SEC document |
| April 03, 2024 Filed Apr 4, 2024 21:24 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | GrantCommon Stock | 3,840 | $0.00 | $0.00 |
DisclosureSEC source: 0000950170-24-041905 · ownership.xml · nonDerivative · entry 1 House Arthur H · CIK 0001685155 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 46,024 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 46,024 shares directly. Read SEC document |
| April 05, 2023 Filed Apr 7, 2023 20:17 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | GrantCommon Stock | 11,627 | $0.00 | $0.00 |
DisclosureSEC source: 0001209191-23-023781 · doc4.xml · nonDerivative · entry 1 House Arthur H · CIK 0001685155 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 42,184 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 42,184 shares directly. Read SEC document |
| April 05, 2022 Filed Apr 6, 2022 21:36 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | GrantCommon Stock | 6,067 | $0.00 | $0.00 |
DisclosureSEC source: 0001209191-22-023535 · doc4.xml · nonDerivative · entry 1 House Arthur H · CIK 0001685155 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 30,557 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 30,557 shares directly. Read SEC document |
| April 05, 2021 Filed Apr 7, 2021 17:27 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | GrantCommon Stock | 2,073 | $0.00 | $0.00 |
DisclosureSEC source: 0001209191-21-025803 · doc4.xml · nonDerivative · entry 1 House Arthur H · CIK 0001685155 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 24,490 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 24,490 shares directly. Read SEC document |
| April 03, 2020 Filed Apr 7, 2020 19:35 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | GrantCommon Stock | 7,092 | $0.00 | $0.00 |
DisclosureSEC source: 0001209191-20-023749 · doc4.xml · nonDerivative · entry 1 House Arthur H · CIK 0001685155 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 22,417 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 22,417 shares directly. Read SEC document |
| April 03, 2019 Filed Apr 4, 2019 20:59 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | GrantCommon Stock | 3,152 | $0.00 | $0.00 |
DisclosureSEC source: 0001209191-19-023672 · doc4.xml · nonDerivative · entry 1 House Arthur H · CIK 0001685155 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 15,325 F1 · date: This award of immediately vested shares of AMSC stock was made in accordance with the 2007 Director Stock Plan. F2 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 15,325 shares directly. Read SEC document |
| April 04, 2018 Filed Apr 6, 2018 18:27 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | GrantCommon Stock | 6,896 | $0.00 | $0.00 |
DisclosureSEC source: 0001209191-18-024169 · doc4.xml · nonDerivative · entry 1 House Arthur H · CIK 0001685155 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 12,173 F1 · date: This award of immediately vested shares of AMSC stock was made in accordance with the 2007 Director Stock Plan. F2 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 12,173 shares directly. Read SEC document |
| April 05, 2017 Filed Apr 7, 2017 20:37 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | GrantCommon Stock | 3,277 | $0.00 | $0.00 |
DisclosureSEC source: 0001209191-17-026272 · doc4.xml · nonDerivative · entry 1 House Arthur H · CIK 0001685155 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 5,277 F1 · date: This grant was made in accordance with the 2007 Director Stock Plan F2 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 5,277 shares directly. Read SEC document |
| September 20, 2016 Filed Sep 22, 2016 20:59 UTC | AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 | GrantStock Options (Right to Buy) · Derivative | 9,703 | $0.00 Strike: $6.80 | $0.00 |
DisclosureSEC source: 0001209191-16-142500 · doc4.xml · derivative · entry 1 House Arthur H · CIK 0001685155 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 9,703 Underlying: Common Stock · 9,703 shares Expires 2026-09-20 F1 · derivative.exercise_date: An option to purchase 9,703 shares of Common Stock was automatically granted under the Amended and Restated 2007 Director Stock Plan on the third business day following Mr. House's election to the Board and vests in two equal annual installments beginning September 20, 2017. 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.