American Superconductor Corporation (AMSC), founded in 1987, provides megawatt-scale power resiliency solutions for electric grids, naval fleets, and wind power markets. Key products include HTS superconductor wire (Amperium), D-VAR voltage control systems, PowerModule power converters, degaussing ship protection systems, and wind turbine electrical control systems. AMSC serves utilities, industrial manufacturers, semiconductor fabs, and the U.S. and Royal Canadian Navies, with an estimated $9 billion total addressable market.
Q2 FY2026 — expected 2026-07-13
| Filed | Period | Accession | Source | Full Text |
|---|---|---|---|---|
| 2025-05-21 | 2025-03-31 | 0001437749-25-017986 | EDGAR | 56K words |
| 2024-05-29 | 2024-03-31 | 0001437749-24-018602 | EDGAR | — |
| 2023-05-31 | 2023-03-31 | 0001437749-23-016265 | EDGAR | — |
| 2022-06-01 | 2022-03-31 | 0001437749-22-014035 | EDGAR | — |
| 2021-06-02 | 2021-03-31 | 0001437749-21-013956 | EDGAR | — |
| 2020-06-02 | 2020-03-31 | 0001437749-20-012276 | EDGAR | — |
| 2019-06-05 | 2019-03-31 | 0001437749-19-011477 | EDGAR | — |
| 2018-06-06 | 2018-03-31 | 0001628280-18-007644 | EDGAR | — |
| 2017-05-25 | 2017-03-31 | 0001628280-17-005885 | EDGAR | — |
| 2016-05-31 | 2016-03-31 | 0001564590-16-020115 | EDGAR | — |
| Filed | Period | Accession | Source | Full Text |
|---|---|---|---|---|
| 2026-02-04 | 2025-12-31 | 0001437749-26-002978 | EDGAR | 28K words |
| 2025-11-05 | 2025-09-30 | 0001437749-25-033351 | EDGAR | — |
| 2025-07-30 | 2025-06-30 | 0001437749-25-023968 | EDGAR | — |
| 2025-02-05 | 2024-12-31 | 0001437749-25-002900 | EDGAR | — |
| 2024-10-30 | 2024-09-30 | 0001437749-24-032618 | EDGAR | — |
| 2024-08-06 | 2024-06-30 | 0001437749-24-024886 | EDGAR | — |
| 2024-01-24 | 2023-12-31 | 0001437749-24-002041 | EDGAR | — |
| 2023-11-01 | 2023-09-30 | 0001437749-23-029753 | EDGAR | — |
| 2023-08-09 | 2023-06-30 | 0001437749-23-022793 | EDGAR | — |
| 2023-02-01 | 2022-12-31 | 0001437749-23-002270 | EDGAR | — |
| 2022-11-01 | 2022-09-30 | 0001437749-22-025367 | EDGAR | — |
| 2022-08-03 | 2022-06-30 | 0001437749-22-018630 | EDGAR | — |
| Filed | Accession | Source | Full Text |
|---|---|---|---|
| 2026-02-04 | 0001437749-26-002977 | EDGAR | 5K words |
| 2025-12-23 | 0001193125-25-330930 | EDGAR | — |
| 2025-12-10 | 0001193125-25-314153 | EDGAR | — |
| 2025-11-05 | 0001437749-25-033344 | EDGAR | — |
| 2025-07-30 | 0001437749-25-023965 | EDGAR | — |
| 2025-07-29 | 0001437749-25-023783 | EDGAR | — |
| 2025-06-11 | 0001193125-25-139243 | EDGAR | — |
| 2025-05-21 | 0001437749-25-017983 | EDGAR | — |
| 2025-02-05 | 0001437749-25-002901 | EDGAR | — |
| 2024-10-30 | 0001437749-24-032617 | EDGAR | — |
339 total filings indexed. 307 additional filings (S-1, DEF 14A, etc.) View all (JSON) · SEC EDGAR
| CIK | 0000880807 |
| Ticker | AMSC |
| Exchange | Nasdaq |
| SIC | 3621: Motors & Generators |
| Incorporated | DE |
| Website | https://www.amsc.com |
| Listed | 1991-12-11 |
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