🕵️ American Superconductor Corporation ($AMSC)
SEC insider & ownership activity, last 12 months · CIK 880807 · every row links its SEC filing
Insider buy value was withheld pending verification over the last 12 months. BlackRock, Inc. trimmed 8.7% → 7.1%. No red-flag 8-Ks in the window.
🚨 4 signals active —
planned-vs-executed verdicts, pre-event flags, and cluster context live in the
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
1 buyer, value withheld pending verification (1 lots) · 4 sellers, $7.8M (25 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Daniel McGahn | 0 | – | 12 | $5.3M | Jun 11, 2026 |
| John Kosiba | 0 | – | 11 | $2.3M | Jun 11, 2026 |
| Laura A. Dambier | 0 | – | 1 | $151K | Jun 11, 2026 |
| David R. Oliver Jr. | 1 | value withheld pending verification | 1 | $7K | Feb 24, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| BlackRock, Inc. | 7.1% | 13G | Apr 17, 2025 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| John Kosiba | $254K | Jun 11, 2026 | filing ↗ |
| Daniel McGahn | $604K | Jun 11, 2026 | filing ↗ |
| Laura A. Dambier | $161K | Jun 10, 2026 | filing ↗ |
| John Kosiba | $202K | Jun 8, 2026 | filing ↗ |
| Daniel McGahn | $404K | Jun 8, 2026 | filing ↗ |
| Daniel McGahn | $630K | Jun 3, 2026 | filing ↗ |
| John Kosiba | $316K | Jun 3, 2026 | filing ↗ |
| John Kosiba | $1.5M | Jun 2, 2026 | filing ↗ |
| Daniel McGahn | $3.7M | Jun 2, 2026 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | Jul 31, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jul 31, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 31, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jun 1, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 1, 2026 | filing ↗ |
| Earnings (2.02) | May 27, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 27, 2026 | filing ↗ |
| Earnings (2.02) | Feb 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 4, 2026 | filing ↗ |
| Other events (8.01) | Dec 23, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 23, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 5, 2025 | filing ↗ |
| Material agreement (1.01) | Dec 5, 2025 | filing ↗ |
| Acquisition or disposition (2.01) | Dec 5, 2025 | filing ↗ |
| Unregistered equity sale (3.02) | Dec 5, 2025 | filing ↗ |
| Other events (8.01) | Dec 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 5, 2025 | filing ↗ |
| Earnings (2.02) | Nov 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 5, 2025 | filing ↗ |