8 insiders reported 62 Form 4 transactions for AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC) over the past 18 months (most recent 2026-09-21). Recent activity: Littlefield Barbara G. (Director) Buy 1,607 shares, Dambier Laura A. (Director) Sell 4,000 shares, McGahn Daniel P (Chairman, President and CEO) Sell 11,508 shares, McGahn Daniel P (Chairman, President and CEO) Sell 4,609 shares, Kosiba John W JR (SVP, CFO & Treasurer) Sell 5,026 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-21 | Littlefield Barbara G. | Director | Buy | 1,607 | $0 |
| 2026-06-12 | Dambier Laura A. | Director | Sell | 4,000 | $150,520 |
| 2026-06-11 | McGahn Daniel P | Chairman, President and CEO | Sell | 11,508 | $429,018 |
| 2026-06-11 | McGahn Daniel P | Chairman, President and CEO | Sell | 4,609 | $174,451 |
| 2026-06-11 | Kosiba John W JR | SVP, CFO & Treasurer | Sell | 5,026 | $187,621 |
| 2026-06-11 | Kosiba John W JR | SVP, CFO & Treasurer | Sell | 1,743 | $65,973 |
| 2026-06-10 | Kosiba John W JR | SVP, CFO & Treasurer | Sell | 3,286 | $136,369 |
| 2026-06-10 | Kosiba John W JR | SVP, CFO & Treasurer | Sell | 1,549 | $65,600 |
| 2026-06-10 | McGahn Daniel P | Chairman, President and CEO | Sell | 4,992 | $206,619 |
| 2026-06-10 | McGahn Daniel P | Chairman, President and CEO | Sell | 4,678 | $197,365 |
| 2026-06-03 | McGahn Daniel P | Chairman, President and CEO | Sell | 27,900 | $1.4M |
| 2026-06-03 | McGahn Daniel P | Chairman, President and CEO | Sell | 13,762 | $680,531 |
| 2026-06-03 | McGahn Daniel P | Chairman, President and CEO | Buy | 60,000 | $0 |
| 2026-06-03 | McGahn Daniel P | Chairman, President and CEO | Sell | 28,558 | $1.5M |
| 2026-06-03 | McGahn Daniel P | Chairman, President and CEO | Sell | 2,305 | $120,183 |
| 2026-06-03 | McGahn Daniel P | Chairman, President and CEO | Sell | 7,075 | $341,793 |
| 2026-06-03 | McGahn Daniel P | Chairman, President and CEO | Sell | 4,501 | $221,674 |
| 2026-06-03 | McGahn Daniel P | Chairman, President and CEO | Sell | 500 | $25,145 |
| 2026-06-03 | McGahn Daniel P | Chairman, President and CEO | Sell | 817 | $41,659 |
| 2026-06-03 | Kosiba John W JR | SVP, CFO & Treasurer | Buy | 30,000 | $0 |
| 2026-06-03 | Kosiba John W JR | SVP, CFO & Treasurer | Sell | 5,704 | $282,120 |
| 2026-06-03 | Kosiba John W JR | SVP, CFO & Treasurer | Sell | 12,122 | $613,616 |
| 2026-06-03 | Kosiba John W JR | SVP, CFO & Treasurer | Sell | 12,036 | $619,493 |
| 2026-06-03 | Kosiba John W JR | SVP, CFO & Treasurer | Sell | 600 | $31,314 |
| 2026-06-03 | Kosiba John W JR | SVP, CFO & Treasurer | Sell | 3,200 | $154,592 |
Source: SEC Form 4 filings · as of 2026-09-21