AMSC AMERICAN SUPERCONDUCTOR CORP /DE/
Nasdaq · SEC CIK 880807 · EDGAR
- Bought, last 12 months
- $0 0 purchases by 0 insiders
- Sold, last 12 months
- $7.80M 8 sales by 4 insiders
- Filings on record
- 81 since 2021-07-06, latest 2026-09-21 17:22
BoughtSold
Most active insiders, 12 months
| Insider | Title | Bought | Sold |
|---|---|---|---|
| McGahn Daniel P | COB, Pres, CEO, Dir | — | $5.32M |
| Kosiba John W JR | SVP, CFO, Treas | — | $2.32M |
| Dambier Laura A. | Dir | — | $150.5K |
| OLIVER DAVID R JR | Dir | — | $6,820 |
| Donnelly Terence Robert | Dir | — | — |
| Klein Margaret D. | Dir | — | — |
| Littlefield Barbara G. | Dir | — | — |
| House Arthur H | Dir | — | — |
Transactions 84
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-09-21 17:22 | 2026-09-18 | AMSC | Littlefield Barbara G. | Dir | A - Grant | $0.00 | +1,607 | 37.0K | +5% | $0 | |
| 2026-06-12 16:11 | 2026-06-11 | AMSC | Dambier Laura A. | Dir | S - Sale | $37.63 | -4,000 | 15.0K | -21% | -$150.5K | |
| MT | 2026-06-11 16:31 | 2026-06-11 | AMSC | Kosiba John W JR | SVP, CFO, Treas | S - Sale | $37.46 | -6,769 | 334.4K | -2% | -$253.6K |
| MT | 2026-06-11 16:29 | 2026-06-11 | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | S - Sale | $37.45 | -16.1K | 1.13M | -1% | -$603.5K |
| MT | 2026-06-10 16:55 | 2026-06-08 | AMSC | Kosiba John W JR | SVP, CFO, Treas | S - Sale | $41.77 | -4,835 | 341.1K | -1% | -$202.0K |
| MT | 2026-06-10 16:53 | 2026-06-08 | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | S - Sale | $41.78 | -9,670 | 1.15M | -0.8% | -$404.0K |
| T | 2026-06-03 16:15 | 2026-06-01 | AMSC | Kosiba John W JR | SVP, CFO, Treas | A - Grant | $0.00 | +30.0K | 382.9K | +9% | $0 |
| MT | 2026-06-03 16:15 | 2026-06-02+ | AMSC | Kosiba John W JR | SVP, CFO, Treas | S - Sale | $50.45 | -36.9K | 346.0K | -10% | -$1.86M |
| T | 2026-06-03 16:11 | 2026-06-01 | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | A - Grant | $0.00 | +60.0K | 1.24M | +5% | $0 |
| MT | 2026-06-03 16:11 | 2026-06-02+ | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | S - Sale | $50.49 | -85.4K | 1.16M | -7% | -$4.31M |
| 2026-04-07 17:45 | 2026-04-03 | AMSC | Donnelly Terence Robert | Dir | A - Grant | $0.00 | +2,665 | 2,665 | New | $0 | |
| 2026-04-07 17:42 | 2026-04-03 | AMSC | OLIVER DAVID R JR | Dir | A - Grant | $0.00 | +3,116 | 63.8K | +5% | $0 | |
| 2026-04-07 17:40 | 2026-04-03 | AMSC | Littlefield Barbara G. | Dir | A - Grant | $0.00 | +3,116 | 35.4K | +10% | $0 | |
| 2026-04-07 17:38 | 2026-04-03 | AMSC | Klein Margaret D. | Dir | A - Grant | $0.00 | +3,116 | 19.5K | +19% | $0 | |
| 2026-04-07 17:35 | 2026-04-03 | AMSC | House Arthur H | Dir | A - Grant | $0.00 | +3,116 | 51.8K | +6% | $0 | |
| 2026-04-07 17:33 | 2026-04-03 | AMSC | Dambier Laura A. | Dir | A - Grant | $0.00 | +3,116 | 19.0K | +20% | $0 | |
| 2026-02-26 | 2026-02-24 | AMSC | OLIVER DAVID R JR | Dir | S - Sale | $34.10 | -200 | 60.7K | -0.3% | -$6,820 | |
| 2025-11-13 | 2019-06-18 | AMSC | OLIVER DAVID R JR | Dir | P - Purchase | $8.33 | +200 | 60.9K | +0.3% | +$1,666 | |
| D | 2025-08-08 | 2025-08-08 | AMSC | House Arthur H | Dir | S - Sale+OE | $50.92 | -9,703 | 48.7K | -17% | -$494.1K |
| D | 2025-08-08 | 2025-08-06 | AMSC | House Arthur H | Dir | M - OptEx | $6.80 | +9,703 | 58.4K | +20% | +$66.0K |
| M | 2025-08-06 | 2025-08-04 | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | S - Sale | $54.49 | -100.8K | 1.21M | -8% | -$5.50M |
| 2025-08-06 | 2022-08-04 | AMSC | Klein Margaret D. | Dir | P - Purchase | $5.57 | +500 | 16.4K | +3% | +$2,785 | |
| I | 2025-08-06 | 2025-08-04 | AMSC | Kosiba John W JR | SVP, CFO, Treas | S - Sale | $55.26 | -9,843 | 0 | -100% | -$543.9K |
| M | 2025-08-06 | 2025-08-04 | AMSC | Kosiba John W JR | SVP, CFO, Treas | S - Sale | $54.59 | -50.0K | 352.9K | -12% | -$2.73M |
| MT | 2025-06-12 | 2025-06-11 | AMSC | Kosiba John W JR | SVP, CFO, Treas | S - Sale | $28.57 | -6,642 | 402.9K | -2% | -$189.8K |
| MT | 2025-06-12 | 2025-06-11 | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | S - Sale | $28.58 | -12.8K | 1.28M | -1.0% | -$366.3K |
| T | 2025-06-09 | 2025-06-06 | AMSC | Kosiba John W JR | SVP, CFO, Treas | S - Sale | $31.83 | -4,744 | 409.5K | -1% | -$151.0K |
| T | 2025-06-09 | 2025-06-06 | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | S - Sale | $31.82 | -7,689 | 1.30M | -0.6% | -$244.7K |
| MT | 2025-05-29 | 2025-05-27 | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | S - Sale | $26.39 | -122.7K | 1.30M | -9% | -$3.24M |
| MT | 2025-05-29 | 2025-05-27 | AMSC | Kosiba John W JR | SVP, CFO, Treas | S - Sale | $26.40 | -50.0K | 454.2K | -10% | -$1.32M |
| T | 2025-05-22 | 2025-05-20 | AMSC | Kosiba John W JR | SVP, CFO, Treas | S - Sale | $24.50 | -11.9K | 464.3K | -2% | -$290.6K |
| T | 2025-05-22 | 2025-05-20 | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | S - Sale | $24.49 | -12.8K | 1.43M | -0.9% | -$313.8K |
| 2025-05-19 | 2025-05-15 | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | A - Grant | $0.00 | +240.0K | 1.44M | +20% | $0 | |
| 2025-05-19 | 2025-05-15 | AMSC | Kosiba John W JR | SVP, CFO, Treas | A - Grant | $0.00 | +120.0K | 476.1K | +34% | $0 | |
| 2025-04-04 | 2025-04-03 | AMSC | House Arthur H | Dir | A - Grant | $0.00 | +2,639 | 48.7K | +6% | $0 | |
| 2025-04-04 | 2025-04-03 | AMSC | Littlefield Barbara G. | Dir | A - Grant | $0.00 | +2,639 | 32.3K | +9% | $0 | |
| 2025-04-04 | 2025-04-03 | AMSC | Klein Margaret D. | Dir | A - Grant | $0.00 | +2,639 | 15.9K | +20% | $0 | |
| 2025-04-04 | 2025-04-03 | AMSC | OLIVER DAVID R JR | Dir | A - Grant | $0.00 | +2,639 | 60.7K | +5% | $0 | |
| 2025-04-04 | 2025-04-03 | AMSC | Dambier Laura A. | Dir | A - Grant | $0.00 | +2,639 | 15.9K | +20% | $0 | |
| 2024-11-06 | 2024-11-04 | AMSC | Kosiba John W JR | SVP, CFO, Treas | S - Sale | $28.28 | -50.0K | 356.1K | -12% | -$1.41M | |
| 2024-10-01 | 2024-09-30 | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | A - Grant | $0.00 | +180.0K | 1.20M | +18% | $0 | |
| 2024-09-30 | 2024-09-26 | AMSC | Kosiba John W JR | SVP, CFO, Treas | A - Grant | $0.00 | +90.0K | 406.1K | +28% | $0 | |
| T | 2024-06-12 | 2024-06-11 | AMSC | Kosiba John W JR | SVP, CFO, Treas | S - Sale | $21.68 | -32.0K | 316.1K | -9% | -$693.8K |
| T | 2024-06-12 | 2024-06-11 | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | S - Sale | $21.69 | -37.2K | 1.02M | -4% | -$806.1K |
| MT | 2024-05-23 | 2024-05-21 | AMSC | Kosiba John W JR | SVP, CFO, Treas | S - Sale | $14.82 | -29.0K | 350.3K | -8% | -$429.7K |
| MT | 2024-05-23 | 2024-05-21 | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | S - Sale | $14.82 | -20.6K | 1.06M | -2% | -$304.7K |
| 2024-04-04 | 2024-04-03 | AMSC | House Arthur H | Dir | A - Grant | $0.00 | +3,840 | 46.0K | +9% | $0 | |
| 2024-04-04 | 2024-04-03 | AMSC | Dambier Laura A. | Dir | A - Grant | $0.00 | +3,840 | 13.2K | +41% | $0 | |
| 2024-04-04 | 2024-04-03 | AMSC | Littlefield Barbara G. | Dir | A - Grant | $0.00 | +3,840 | 29.7K | +15% | $0 | |
| 2024-04-04 | 2024-04-03 | AMSC | Klein Margaret D. | Dir | A - Grant | $0.00 | +3,840 | 13.2K | +41% | $0 | |
| 2024-04-04 | 2024-04-03 | AMSC | OLIVER DAVID R JR | Dir | A - Grant | $0.00 | +3,840 | 58.1K | +7% | $0 | |
| M | 2023-06-23 | 2023-06-21+ | AMSC | Kosiba John W JR | SVP, CFO, Treas | S - Sale | $6.08 | -80.0K | 377.1K | -18% | -$486.1K |
| M | 2023-06-23 | 2023-06-21+ | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | S - Sale | $6.08 | -110.7K | 1.11M | -9% | -$672.7K |
| 2023-06-20 | 2023-06-15 | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | A - Grant | $0.00 | +250.0K | 1.19M | +27% | $0 | |
| 2023-06-20 | 2023-06-15 | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | D - Sale to Iss | $0.00 | -4,839 | 1.19M | -0.4% | $0 | |
| 2023-06-20 | 2023-06-15 | AMSC | Kosiba John W JR | SVP, CFO, Treas | A - Grant | $0.00 | +105.0K | 458.8K | +30% | $0 | |
| 2023-06-20 | 2023-06-15 | AMSC | Kosiba John W JR | SVP, CFO, Treas | D - Sale to Iss | $0.00 | -1,613 | 457.1K | -0.4% | $0 | |
| 2023-04-07 | 2023-04-05 | AMSC | House Arthur H | Dir | A - Grant | $0.00 | +11.6K | 42.2K | +38% | $0 | |
| 2023-04-07 | 2023-04-05 | AMSC | Dambier Laura A. | Dir | A - Grant | $0.00 | +9,397 | 9,397 | New | $0 | |
| 2023-04-07 | 2023-04-05 | AMSC | OLIVER DAVID R JR | Dir | A - Grant | $0.00 | +11.6K | 54.2K | +27% | $0 | |
| 2023-04-07 | 2023-04-05 | AMSC | Klein Margaret D. | Dir | A - Grant | $0.00 | +9,397 | 9,397 | New | $0 | |
| 2023-04-07 | 2023-04-05 | AMSC | Littlefield Barbara G. | Dir | A - Grant | $0.00 | +11.6K | 25.8K | +82% | $0 | |
| 2022-12-19 | 2022-12-16 | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | P - Purchase | $3.49 | +25.0K | 943.2K | +3% | +$87.2K | |
| 2022-12-19 | 2022-12-16 | AMSC | Kosiba John W JR | SVP, CFO, Treas | P - Purchase | $3.50 | +15.0K | 353.8K | +4% | +$52.5K | |
| 2022-12-13 | 2022-12-12 | AMSC | Kosiba John W JR | SVP, CFO, Treas | P - Purchase | $3.34 | +25.0K | 338.8K | +8% | +$83.5K | |
| 2022-11-02 | 2022-10-31 | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | A - Grant | $0.00 | +250.0K | 918.2K | +37% | $0 | |
| 2022-10-21 | 2022-10-19 | AMSC | Kosiba John W JR | SVP, CFO, Treas | A - Grant | $0.00 | +125.0K | 313.8K | +66% | $0 | |
| 2022-06-13 | 2022-06-10 | AMSC | BUDHRAJA VIKRAM S | Dir | A - Grant | $0.00 | +1,538 | 59.3K | +3% | $0 | |
| 2022-06-13 | 2022-06-10 | AMSC | Kosiba John W JR | SVP, CFO, Treas | S - Sale | $5.97 | -8,473 | 188.8K | -4% | -$50.6K | |
| 2022-06-13 | 2022-06-10 | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | S - Sale | $5.98 | -32.6K | 668.2K | -5% | -$194.9K | |
| 2022-06-02 | 2022-05-31 | AMSC | Kosiba John W JR | SVP, CFO, Treas | S - Sale | $5.45 | -13.3K | 197.2K | -6% | -$72.6K | |
| 2022-06-02 | 2022-05-31 | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | S - Sale | $5.45 | -21.7K | 700.8K | -3% | -$118.4K | |
| 2022-04-06 | 2022-04-05 | AMSC | BUDHRAJA VIKRAM S | Dir | A - Grant | $0.00 | +6,067 | 57.8K | +12% | $0 | |
| 2022-04-06 | 2022-04-05 | AMSC | OLIVER DAVID R JR | Dir | A - Grant | $0.00 | +6,067 | 42.6K | +17% | $0 | |
| 2022-04-06 | 2022-04-05 | AMSC | Littlefield Barbara G. | Dir | A - Grant | $0.00 | +6,067 | 14.2K | +75% | $0 | |
| 2022-04-06 | 2022-04-05 | AMSC | House Arthur H | Dir | A - Grant | $0.00 | +6,067 | 30.6K | +25% | $0 | |
| 2021-12-13 | 2021-12-10 | AMSC | Kosiba John W JR | SVP, CFO, Treas | S - Sale | $11.31 | -22.8K | 210.6K | -10% | -$257.3K | |
| 2021-12-09 | 2021-12-08 | AMSC | BUDHRAJA VIKRAM S | Dir | S - Sale | $11.98 | -3,000 | 51.7K | -5% | -$35.9K | |
| M | 2021-11-02 | 2021-11-01+ | AMSC | Kosiba John W JR | SVP, CFO, Treas | S - Sale | $18.84 | -11.0K | 233.3K | -5% | -$207.4K |
| 2021-11-02 | 2021-11-01 | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | S - Sale | $18.96 | -7,241 | 722.5K | -1.0% | -$137.3K | |
| 2021-08-06 | 2021-08-05 | AMSC | Kosiba John W JR | SVP, CFO, Treas | A - Grant | $12.54 | +11.9K | 244.3K | +5% | +$149.8K | |
| 2021-08-06 | 2021-08-05 | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | A - Grant | $12.54 | +35.7K | 729.8K | +5% | +$447.2K | |
| 2021-07-06 | 2021-07-01 | AMSC | McGahn Daniel P | COB, Pres, CEO, Dir | S - Sale | $17.66 | -14.7K | 694.1K | -2% | -$259.0K | |
| 2021-07-06 | 2021-07-01 | AMSC | Kosiba John W JR | SVP, CFO, Treas | S - Sale | $17.66 | -6,409 | 232.4K | -3% | -$113.2K |
Purchase Sale Sale after option exercise All abbreviations