Arthur H. House sold AMSC shares once on the open market in the last year, totaling about $494 thousand, with the most recent sale on August 8, 2025. His sales rank 6,481st among nearly 12,000 insiders, below the average of $8.6 million per seller and 6.4 transactions. House made no open market purchases of American Superconductor Corp. ($AMSC) stock during this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Aug. 6, 2025 | AMERICAN SUPERCONDUCTOR CORP /DE/ | $AMSC | House Arthur H | Not found | M | Common Stock | 9703 | $6.80 | 58,366.0000 | 45,564,000 | 19.94% | 0.02% |
| Aug. 8, 2025 | AMERICAN SUPERCONDUCTOR CORP /DE/ | $AMSC | House Arthur H | Not found | S | Common Stock | 9703 | $50.92 | 48,663.0000 | 45,564,000 | 16.62% | 0.02% |
| Aug. 6, 2025 | AMERICAN SUPERCONDUCTOR CORP /DE/ | $AMSC | House Arthur H | Not found | M | Stock Options (Right to Buy) | 9703 | $0.00 | 0.0000 | 45,564,000 | 100.00% | 0.02% |
| April 3, 2025 | AMERICAN SUPERCONDUCTOR CORP /DE/ | $AMSC | House Arthur H | Not found | A | Common Stock | 2639 | $0.00 | 48,663.0000 | 39,888,000 | 5.73% | 0.01% |
| April 3, 2024 | AMERICAN SUPERCONDUCTOR CORP /DE/ | $AMSC | House Arthur H | Not found | A | Common Stock | 3840 | $0.00 | 46,024.0000 | 37,343,000 | 9.10% | 0.01% |
| April 5, 2023 | AMERICAN SUPERCONDUCTOR CORP /DE/ | $AMSC | House Arthur H | Director | A | Common Stock | 11627 | $0.00 | 42,184.0000 | 29,937,000 | 38.05% | 0.04% |