House Arthur H (CIK 1685155) reported 4 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-04-07). Recent activity: Buy AMSC (3,116 shares), Buy AMSC (9,703 shares), Sell AMSC (9,703 shares), Buy AMSC (2,639 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-04-07 | AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC) | Director | Buy | 3,116 | $0 |
| 2025-08-08 | AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC) | Director | Buy | 9,703 | $65,980 |
| 2025-08-08 | AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC) | Director | Sell | 9,703 | $494,077 |
| 2025-04-04 | AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC) | Director | Buy | 2,639 | $0 |
Source: SEC Form 4 filings · as of 2026-04-07