AMSC - CIK 0000880807
AMERICAN SUPERCONDUCTOR CORP /DE/ has filed 1,298 documents with the SEC between 1996 and 2026. The most frequent type is insider trade (505 filings), alongside the regular cadence of annual reports, quarterly reports, and event disclosures every public company must make. Use the filters to focus on one filing type, or flip the sort to trace the company's history from its earliest paperwork.
Data parsed from SEC EDGAR XBRL filings. See the full market cap rankings.
| Filing | Type | Filed | Period covered |
|---|---|---|---|
| Insider trade | 4 | 2013-05-24 | 2013-05-23 |
| Insider trade | 4 | 2013-05-10 | 2013-05-09 |
| Insider trade | 4 | 2013-05-10 | 2013-05-08 |
| Major company event | 8-K | 2013-04-01 | 2013-04-01 |
| CT ORDER | - | 2013-03-14 | - |
| Major company event | 8-K | 2013-02-20 | 2013-02-14 |
| Activist ownership stake (update) | SC 13D/A | 2013-02-14 | - |
| Major company event | 8-K | 2013-02-14 | 2013-02-08 |
| Insider trade | 4 | 2013-02-13 | 2013-02-11 |
| Passive ownership stake (update) | SC 13G/A | 2013-02-13 | - |
| Quarterly report | 10-Q | 2013-02-11 | 2012-12-31 |
| Major company event | 8-K | 2013-02-11 | 2013-02-11 |
| Passive ownership stake (update) | SC 13G/A | 2013-02-08 | - |
| Insider trade | 4 | 2013-02-08 | 2013-02-06 |
| Major company event | 8-K | 2013-01-08 | 2013-01-02 |
| Insider trade | 4 | 2013-01-03 | 2012-12-31 |
| Insider trade | 4 | 2013-01-03 | 2012-12-31 |
| Passive ownership stake | SC 13G | 2012-12-31 | - |
| Major company event | 8-K | 2012-12-21 | 2012-12-20 |
| Insider trade | 4 | 2012-12-04 | 2012-11-30 |
| Insider trade | 4 | 2012-11-29 | 2012-11-27 |
| Major company event | 8-K | 2012-11-28 | 2012-11-27 |
| Insider trade | 4 | 2012-11-26 | 2012-11-21 |
| EFFECT | - | 2012-11-16 | - |
| Securities registration | S-3 | 2012-11-06 | - |
| Quarterly report | 10-Q | 2012-11-06 | 2012-09-30 |
| Major company event | 8-K | 2012-11-06 | 2012-11-06 |
| Insider trade | 4 | 2012-10-26 | 2012-10-25 |
| Insider trade | 4 | 2012-10-26 | 2012-10-25 |
| Insider trade | 4 | 2012-10-26 | 2012-10-25 |
| Insider trade | 4 | 2012-10-26 | 2012-10-25 |
| Insider trade | 4 | 2012-10-26 | 2012-10-25 |
| Insider trade | 4 | 2012-10-26 | 2012-10-25 |
| EFFECT | - | 2012-10-18 | - |
| EFFECT | - | 2012-10-18 | - |
| POS AM | - | 2012-10-16 | - |
| Securities registration | S-3 | 2012-10-01 | - |
| Insider trade | 4 | 2012-08-03 | 2012-08-01 |
| Insider trade | 4 | 2012-08-03 | 2012-08-01 |
| Insider trade | 4 | 2012-08-03 | 2012-08-01 |
| Insider trade | 4 | 2012-08-03 | 2012-08-01 |
| Insider trade | 4 | 2012-08-03 | 2012-08-01 |
| Insider trade | 4 | 2012-08-03 | 2012-08-01 |
| Employee stock plan | S-8 | 2012-08-03 | - |
| 424B3 | - | 2012-08-03 | - |
| Quarterly report | 10-Q | 2012-08-03 | 2012-06-30 |
| Major company event | 8-K | 2012-08-02 | 2012-08-02 |
| 424B3 | - | 2012-07-27 | - |
| Major company event | 8-K | 2012-07-27 | 2012-07-26 |
| Annual report to shareholders | ARS | 2012-07-25 | 2012-03-31 |