American Superconductor Corp
AMSCNasdaqCIK 880807TechnologyFiscal year ends Mar 31
Reports and events: 301 filings
Newest first, by EDGAR acceptance time (Eastern). Each filing’s page lists its documents on sec.gov and, for 10-K and 10-Q reports, the extracted sections.
What the forms are: 10-K, 10-Q, 8-K, Form 4, DEF 14A, Schedule 13D, Schedule 13G, amendments, accession numbers.
| Filed | Form | What it is | Accession number |
|---|---|---|---|
| 2026-09-2116:07 ET | 8-K | 5.02 Departure or appointment of officers or directors | 0001437749-26-030822 |
| 2026-08-0516:10 ET | 10-Q | Quarterly reportPeriod 2026-06-30 | 0001437749-26-025922 |
| 2026-08-0516:07 ET | 8-K | 2.02 Results of operations; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001437749-26-025921 |
| 2026-06-1816:05 ET | DEF 14A | Proxy statementPeriod 2026-07-31 | 0001193125-26-275809 |
| 2026-06-0216:05 ET | 8-K | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001437749-26-019163 |
| 2026-05-2716:09 ET | 10-K | Annual reportPeriod 2026-03-31 | 0001437749-26-018542 |
| 2026-05-2716:06 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001437749-26-018539 |
| 2026-02-1716:08 ET | 8-K/A | 9.01 Financial statements and exhibits | 0001437749-26-004349 |
| 2026-02-0416:10 ET | 10-Q | Quarterly reportPeriod 2025-12-31 | 0001437749-26-002978 |
| 2026-02-0416:07 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001437749-26-002977 |
| 2025-12-2316:12 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-25-330930 |
| 2025-12-1016:04 ET | 8-K | 1.01 Entry into a material agreement; 2.01 Completion of an acquisition or disposition; 3.02 Unregistered sale of equity; 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-25-314153 |
| 2025-11-0516:13 ET | 10-Q | Quarterly reportPeriod 2025-09-30 | 0001437749-25-033351 |
| 2025-11-0516:09 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001437749-25-033344 |
| 2025-07-3016:08 ET | 10-Q | Quarterly reportPeriod 2025-06-30 | 0001437749-25-023968 |
| 2025-07-3016:06 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001437749-25-023965 |
| 2025-07-2916:09 ET | 8-K | 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001437749-25-023783 |
| 2025-06-1316:05 ET | DEF 14A | Proxy statementPeriod 2025-07-25 | 0001193125-25-140726 |
| 2025-06-1117:06 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-25-139243 |
| 2025-05-2116:17 ET | 10-K | Annual reportPeriod 2025-03-31 | 0001437749-25-017986 |
| 2025-05-2116:01 ET | 8-K | 2.02 Results of operations; 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001437749-25-017983 |
| 2025-02-0516:09 ET | 8-K | 2.02 Results of operations; 5.03 Amendment to articles or bylaws; 9.01 Financial statements and exhibits | 0001437749-25-002901 |
| 2025-02-0516:07 ET | 10-Q | Quarterly reportPeriod 2024-12-31 | 0001437749-25-002900 |
| 2024-10-3016:14 ET | 10-Q | Quarterly reportPeriod 2024-09-30 | 0001437749-24-032618 |
| 2024-10-3016:11 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001437749-24-032617 |
| 2024-08-1320:56 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-24-199141 |
| 2024-08-0616:38 ET | 8-K/A | 9.01 Financial statements and exhibits | 0001437749-24-024924 |
| 2024-08-0616:10 ET | 10-Q | Quarterly reportPeriod 2024-06-30 | 0001437749-24-024886 |
| 2024-08-0616:08 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001437749-24-024881 |
| 2024-08-0516:30 ET | 8-K | 5.02 Departure or appointment of officers or directors; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001193125-24-193965 |
| 2024-08-0509:00 ET | 8-K | 1.01 Entry into a material agreement; 2.01 Completion of an acquisition or disposition; 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-24-193425 |
| 2024-06-2016:05 ET | DEF 14A | Proxy statementPeriod 2024-08-02 | 0001193125-24-164444 |
| 2024-05-2916:35 ET | 10-K | Annual reportPeriod 2024-03-31 | 0001437749-24-018602 |
| 2024-05-2916:33 ET | 8-K | 2.02 Results of operations; 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001437749-24-018599 |
| 2024-01-3116:19 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-24-020938 |
| 2024-01-2416:08 ET | 10-Q | Quarterly reportPeriod 2023-12-31 | 0001437749-24-002041 |
| 2024-01-2416:06 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001437749-24-002040 |
| 2023-11-0116:10 ET | 10-Q | Quarterly reportPeriod 2023-09-30 | 0001437749-23-029753 |
| 2023-11-0116:08 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001437749-23-029749 |
| 2023-08-1116:12 ET | 8-K | 5.07 Shareholder vote results | 0001437749-23-023329 |
| 2023-08-0916:10 ET | 10-Q | Quarterly reportPeriod 2023-06-30 | 0001437749-23-022793 |
| 2023-08-0916:08 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001437749-23-022786 |
| 2023-06-2816:15 ET | DEF 14A | Proxy statementPeriod 2023-08-11 | 0001193125-23-177510 |
| 2023-06-2116:31 ET | 8-K | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001193125-23-171201 |
| 2023-05-3116:12 ET | 10-K | Annual reportPeriod 2023-03-31 | 0001437749-23-016265 |
| 2023-05-3116:11 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001437749-23-016264 |
| 2023-02-0116:57 ET | 10-Q | Quarterly reportPeriod 2022-12-31 | 0001437749-23-002270 |
| 2023-02-0116:56 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001437749-23-002268 |
| 2022-11-0116:08 ET | 10-Q | Quarterly reportPeriod 2022-09-30 | 0001437749-22-025367 |
| 2022-11-0116:06 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001437749-22-025365 |
Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 24, 2026, 14:58 ET. Listed shows no prices and gives no investment advice.