AMERICAN SUPERCONDUCTOR CORP (AMSC) — insider trading
Industrials · NASDAQ
AMERICAN SUPERCONDUCTOR CORP (AMSC) has 31 reported SEC Form 4 insider transactions in our data, including 24 open-market sales among the most recent 31 (latest 2026-06-11).
Recent Form 4 transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-06-11 | Dambier Laura A. | Director | Open-market sale | 4,000 | $37.63 | $150.5K | Form 4 |
| 2026-06-11 | McGahn Daniel P | Director, Officer (Chairman, President and CEO) | Open-market sale | 4,609 | $37.85 | $174.5K | Form 4 |
| 2026-06-11 | McGahn Daniel P | Director, Officer (Chairman, President and CEO) | Open-market sale | 11,508 | $37.28 | $429.0K | Form 4 |
| 2026-06-11 | Kosiba John W JR | Officer (SVP, CFO & Treasurer) | Open-market sale | 1,743 | $37.85 | $66.0K | Form 4 |
| 2026-06-11 | Kosiba John W JR | Officer (SVP, CFO & Treasurer) | Open-market sale | 5,026 | $37.33 | $187.6K | Form 4 |
| 2026-06-08 | McGahn Daniel P | Director, Officer (Chairman, President and CEO) | Open-market sale | 4,678 | $42.19 | $197.4K | Form 4 |
| 2026-06-08 | McGahn Daniel P | Director, Officer (Chairman, President and CEO) | Open-market sale | 4,992 | $41.39 | $206.6K | Form 4 |
| 2026-06-08 | Kosiba John W JR | Officer (SVP, CFO & Treasurer) | Open-market sale | 1,549 | $42.35 | $65.6K | Form 4 |
| 2026-06-08 | Kosiba John W JR | Officer (SVP, CFO & Treasurer) | Open-market sale | 3,286 | $41.50 | $136.4K | Form 4 |
| 2026-06-03 | McGahn Daniel P | Director, Officer (Chairman, President and CEO) | Open-market sale | 817 | $50.99 | $41.7K | Form 4 |
| 2026-06-03 | McGahn Daniel P | Director, Officer (Chairman, President and CEO) | Open-market sale | 500 | $50.29 | $25.1K | Form 4 |
| 2026-06-03 | McGahn Daniel P | Director, Officer (Chairman, President and CEO) | Open-market sale | 4,501 | $49.25 | $221.7K | Form 4 |
| 2026-06-03 | McGahn Daniel P | Director, Officer (Chairman, President and CEO) | Open-market sale | 7,075 | $48.31 | $341.8K | Form 4 |
| 2026-06-03 | Kosiba John W JR | Officer (SVP, CFO & Treasurer) | Open-market sale | 609 | $50.83 | $31.0K | Form 4 |
| 2026-06-03 | Kosiba John W JR | Officer (SVP, CFO & Treasurer) | Open-market sale | 2,638 | $49.28 | $130.0K | Form 4 |
| 2026-06-03 | Kosiba John W JR | Officer (SVP, CFO & Treasurer) | Open-market sale | 3,200 | $48.31 | $154.6K | Form 4 |
| 2026-06-02 | McGahn Daniel P | Director, Officer (Chairman, President and CEO) | Open-market sale | 2,305 | $52.14 | $120.2K | Form 4 |
| 2026-06-02 | McGahn Daniel P | Director, Officer (Chairman, President and CEO) | Open-market sale | 28,558 | $51.46 | $1.47M | Form 4 |
| 2026-06-02 | McGahn Daniel P | Director, Officer (Chairman, President and CEO) | Open-market sale | 27,900 | $50.63 | $1.41M | Form 4 |
| 2026-06-02 | McGahn Daniel P | Director, Officer (Chairman, President and CEO) | Open-market sale | 13,762 | $49.45 | $680.5K | Form 4 |
| 2026-06-02 | Kosiba John W JR | Officer (SVP, CFO & Treasurer) | Open-market sale | 600 | $52.19 | $31.3K | Form 4 |
| 2026-06-02 | Kosiba John W JR | Officer (SVP, CFO & Treasurer) | Open-market sale | 12,036 | $51.47 | $619.4K | Form 4 |
| 2026-06-02 | Kosiba John W JR | Officer (SVP, CFO & Treasurer) | Open-market sale | 12,122 | $50.62 | $613.6K | Form 4 |
| 2026-06-02 | Kosiba John W JR | Officer (SVP, CFO & Treasurer) | Open-market sale | 5,704 | $49.46 | $282.1K | Form 4 |
| 2026-06-01 | McGahn Daniel P | Director, Officer (Chairman, President and CEO) | Grant / award / vesting | 60,000 | $0.00 | $0 | Form 4 |
| 2026-06-01 | Kosiba John W JR | Officer (SVP, CFO & Treasurer) | Grant / award / vesting | 30,000 | $0.00 | $0 | Form 4 |
| 2026-04-03 | House Arthur H | Director | Grant / award / vesting | 3,116 | $0.00 | $0 | Form 4 |
| 2026-04-03 | Klein Margaret D. | Director | Grant / award / vesting | 3,116 | $0.00 | $0 | Form 4 |
| 2026-04-03 | Littlefield Barbara G. | Director | Grant / award / vesting | 3,116 | $0.00 | $0 | Form 4 |
| 2026-04-03 | OLIVER DAVID R JR | Director | Grant / award / vesting | 3,116 | $0.00 | $0 | Form 4 |
| 2026-04-03 | Donnelly Terence Robert | Director | Grant / award / vesting | 2,665 | $0.00 | $0 | Form 4 |
Ask the chat about AMSC's insider activity →
Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: AMERICAN SUPERCONDUCTOR CORP (AMSC).
Last updated 2026-06-11 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.