In the last 12 months, insiders at AMERICAN SUPERCONDUCTOR CORP /DE/ ($AMSC) filed 58 transactions with the SEC: 2 open-market purchases totaling $4,449 and 30 sales totaling $20,190,251. Net insider sentiment: net selling.
AMERICAN SUPERCONDUCTOR CORP /DE/ operates in the Motors & generators industry (Manufacturing sector).
Most Active Insiders
- McGahn Daniel P (Chairman, President and CEO) — 17 transactions totaling $11,440,885
- Kosiba John W JR (SVP, CFO & Treasurer) — 19 transactions totaling $8,248,465
- House Arthur H (Not found) — 5 transactions totaling $560,062
- OLIVER DAVID R JR (Not found) — 4 transactions totaling $8,486
- Klein Margaret D. (Not found) — 3 transactions totaling $2,783
View all SEC Filings for AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC).
Set Up your own filters →Recent Insider Transactions
| Transaction Date | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|
| Feb. 24, 2026 | OLIVER DAVID R JR | Not found | S | Common Stock | 200 | $34.10 | 60,707.0000 | 48,015,000 | 0.33% | 0.00% |
| June 18, 2019 | OLIVER DAVID R JR | Not found | P | Common Stock | 200 | $8.33 | 60,907.0000 | 0 | 0.33% | 0.00% |
| Aug. 6, 2025 | House Arthur H | Not found | M | Stock Options (Right to Buy) | 9703 | $0.00 | 0.0000 | 45,564,000 | 100.00% | 0.02% |
| Aug. 6, 2025 | House Arthur H | Not found | M | Common Stock | 9703 | $6.80 | 58,366.0000 | 45,564,000 | 19.94% | 0.02% |
| Aug. 8, 2025 | House Arthur H | Not found | S | Common Stock | 9703 | $50.92 | 48,663.0000 | 45,564,000 | 16.62% | 0.02% |
| Aug. 4, 2025 | Kosiba John W JR | SVP, CFO & Treasurer | S | Common Stock | 9843 | $55.26 | 352,890.0000 | 45,564,000 | 2.71% | 0.02% |
| Aug. 4, 2025 | McGahn Daniel P | Chairman, President and CEO | S | Common Stock | 27743 | $55.11 | 1,196,022.0000 | 45,564,000 | 2.27% | 0.06% |
| Aug. 4, 2022 | Klein Margaret D. | Not found | P | Common Stock | 500 | $5.57 | 16,376.0000 | 0 | 3.15% | 0.00% |
| Aug. 4, 2025 | McGahn Daniel P | Chairman, President and CEO | S | Common Stock | 73105 | $54.26 | 1,223,765.0000 | 45,564,000 | 5.64% | 0.16% |
| Aug. 4, 2025 | Kosiba John W JR | SVP, CFO & Treasurer | S | Common Stock | 34260 | $54.34 | 368,630.0000 | 45,564,000 | 8.50% | 0.08% |
| Aug. 4, 2025 | Kosiba John W JR | SVP, CFO & Treasurer | S | Common Stock | 15740 | $55.13 | 352,890.0000 | 45,564,000 | 4.27% | 0.03% |
| June 11, 2025 | McGahn Daniel P | Chairman, President and CEO | S | Common Stock | 12315 | $28.56 | 1,297,380.0000 | 39,888,000 | 0.94% | 0.03% |
| June 11, 2025 | Kosiba John W JR | SVP, CFO & Treasurer | S | Common Stock | 6342 | $28.55 | 412,996.0000 | 39,888,000 | 1.51% | 0.02% |
| June 11, 2025 | Kosiba John W JR | SVP, CFO & Treasurer | S | Common Stock | 300 | $29.08 | 412,696.0000 | 39,888,000 | 0.07% | 0.00% |
| June 11, 2025 | McGahn Daniel P | Chairman, President and CEO | S | Common Stock | 500 | $29.09 | 1,296,880.0000 | 39,888,000 | 0.04% | 0.00% |
| June 6, 2025 | Kosiba John W JR | SVP, CFO & Treasurer | S | Common Stock | 4744 | $31.83 | 419,338.0000 | 39,888,000 | 1.12% | 0.01% |
| June 6, 2025 | McGahn Daniel P | Chairman, President and CEO | S | Common Stock | 7689 | $31.82 | 1,309,695.0000 | 39,888,000 | 0.58% | 0.02% |
| May 27, 2025 | Donnelly Terence Robert | Not found | A | Stock Options (Right to Buy) | 2112 | $0.00 | 2,112.0000 | 39,888,000 | 9999.99% | 0.01% |
| May 27, 2025 | Kosiba John W JR | SVP, CFO & Treasurer | S | Common Stock | 10097 | $25.55 | 463,898.0000 | 39,888,000 | 2.13% | 0.03% |
| May 27, 2025 | Kosiba John W JR | SVP, CFO & Treasurer | S | Common Stock | 39903 | $26.61 | 423,995.0000 | 39,888,000 | 8.60% | 0.10% |
| May 27, 2025 | McGahn Daniel P | Chairman, President and CEO | S | Common Stock | 24506 | $25.55 | 1,415,394.0000 | 39,888,000 | 1.70% | 0.06% |
| May 27, 2025 | McGahn Daniel P | Chairman, President and CEO | S | Common Stock | 98149 | $26.60 | 1,317,245.0000 | 39,888,000 | 6.93% | 0.25% |
| May 20, 2025 | McGahn Daniel P | Chairman, President and CEO | S | Common Stock | 12815 | $24.49 | 1,439,900.0000 | 39,888,000 | 0.88% | 0.03% |
| May 20, 2025 | Kosiba John W JR | SVP, CFO & Treasurer | S | Common Stock | 11860 | $24.50 | 473,995.0000 | 39,888,000 | 2.44% | 0.03% |
| May 15, 2025 | McGahn Daniel P | Chairman, President and CEO | A | Common Stock | 240000 | $0.00 | 1,452,715.0000 | 39,888,000 | 19.79% | 0.60% |
| May 15, 2025 | Kosiba John W JR | SVP, CFO & Treasurer | A | Common Stock | 120000 | $0.00 | 485,855.0000 | 39,888,000 | 32.80% | 0.30% |
| April 3, 2025 | OLIVER DAVID R JR | Not found | A | Common Stock | 2639 | $0.00 | 60,707.0000 | 39,888,000 | 4.54% | 0.01% |
| April 3, 2025 | Klein Margaret D. | Not found | A | Common Stock | 2639 | $0.00 | 15,876.0000 | 39,888,000 | 19.94% | 0.01% |
| April 3, 2025 | House Arthur H | Not found | A | Common Stock | 2639 | $0.00 | 48,663.0000 | 39,888,000 | 5.73% | 0.01% |
| April 3, 2025 | Dambier Laura A. | Not found | A | Common Stock | 2639 | $0.00 | 15,876.0000 | 39,888,000 | 19.94% | 0.01% |
| April 3, 2025 | Littlefield Barbara G. | Not found | A | Common Stock | 2639 | $0.00 | 32,311.0000 | 39,888,000 | 8.89% | 0.01% |
| Nov. 4, 2024 | Kosiba John W JR | SVP, CFO & Treasurer | S | Common Stock | 50000 | $28.28 | 365,494.0000 | 39,827,000 | 12.03% | 0.13% |
| Sept. 30, 2024 | McGahn Daniel P | Chairman, President and CEO | A | Common Stock | 180000 | $0.00 | 1,212,238.0000 | 37,399,000 | 17.44% | 0.48% |
| Sept. 26, 2024 | Kosiba John W JR | SVP, CFO & Treasurer | A | Common Stock | 90000 | $0.00 | 415,453.0000 | 37,399,000 | 27.65% | 0.24% |
| June 11, 2024 | Kosiba John W JR | SVP, CFO & Treasurer | S | Common Stock | 32000 | $21.68 | 325,255.0000 | 37,343,000 | 8.96% | 0.09% |
| June 11, 2024 | McGahn Daniel P | Chairman, President and CEO | S | Common Stock | 37165 | $21.69 | 1,031,948.0000 | 37,343,000 | 3.48% | 0.10% |
| May 21, 2024 | McGahn Daniel P | Chairman, President and CEO | S | Common Stock | 18939 | $14.78 | 1,070,733.0000 | 37,343,000 | 1.74% | 0.05% |
| May 21, 2024 | McGahn Daniel P | Chairman, President and CEO | S | Common Stock | 1620 | $15.30 | 1,069,113.0000 | 37,343,000 | 0.15% | 0.00% |
| May 21, 2024 | Kosiba John W JR | SVP, CFO & Treasurer | S | Common Stock | 26830 | $14.78 | 359,425.0000 | 37,343,000 | 6.95% | 0.07% |
| May 21, 2024 | Kosiba John W JR | SVP, CFO & Treasurer | S | Common Stock | 2170 | $15.30 | 357,255.0000 | 37,343,000 | 0.60% | 0.01% |
| April 3, 2024 | Littlefield Barbara G. | Not found | A | Common Stock | 3840 | $0.00 | 29,672.0000 | 37,343,000 | 14.87% | 0.01% |
| April 3, 2024 | OLIVER DAVID R JR | Not found | A | Common Stock | 3840 | $0.00 | 58,068.0000 | 37,343,000 | 7.08% | 0.01% |
| April 3, 2024 | Dambier Laura A. | Not found | A | Common Stock | 3840 | $0.00 | 13,237.0000 | 37,343,000 | 40.86% | 0.01% |
| April 3, 2024 | House Arthur H | Not found | A | Common Stock | 3840 | $0.00 | 46,024.0000 | 37,343,000 | 9.10% | 0.01% |
| April 3, 2024 | Klein Margaret D. | Not found | A | Common Stock | 3840 | $0.00 | 13,237.0000 | 37,343,000 | 40.86% | 0.01% |
| June 22, 2023 | McGahn Daniel P | Chairman, President and CEO | S | Common Stock | 36902 | $5.95 | 1,088,672.0000 | 29,937,000 | 3.28% | 0.12% |
| June 21, 2023 | Kosiba John W JR | SVP, CFO & Treasurer | S | Common Stock | 50132 | $6.15 | 415,136.0000 | 29,937,000 | 10.77% | 0.17% |
| June 22, 2023 | Kosiba John W JR | SVP, CFO & Treasurer | S | Common Stock | 29878 | $5.95 | 385,258.0000 | 29,937,000 | 7.20% | 0.10% |
| June 21, 2023 | McGahn Daniel P | Chairman, President and CEO | S | Common Stock | 73802 | $6.14 | 1,125,574.0000 | 29,937,000 | 6.15% | 0.25% |
| June 15, 2023 | Kosiba John W JR | SVP, CFO & Treasurer | D | Common Stock | 1613 | $0.00 | 465,268.0000 | 29,937,000 | 0.35% | 0.01% |
| June 15, 2023 | McGahn Daniel P | Chairman, President and CEO | A | Common Stock | 250000 | $0.00 | 1,204,215.0000 | 29,937,000 | 26.20% | 0.84% |
| June 15, 2023 | McGahn Daniel P | Chairman, President and CEO | D | Common Stock | 4839 | $0.00 | 1,199,376.0000 | 29,937,000 | 0.40% | 0.02% |
| June 15, 2023 | Kosiba John W JR | SVP, CFO & Treasurer | A | Common Stock | 105000 | $0.00 | 466,881.0000 | 29,937,000 | 29.02% | 0.35% |
| April 5, 2023 | Klein Margaret D. | Director | A | Common Stock | 9397 | $0.00 | 9,397.0000 | 29,937,000 | 9999.99% | 0.03% |
| April 5, 2023 | Dambier Laura A. | Director | A | Common Stock | 9397 | $0.00 | 9,397.0000 | 29,937,000 | 9999.99% | 0.03% |
| April 5, 2023 | Littlefield Barbara G. | Director | A | Common Stock | 11627 | $0.00 | 25,832.0000 | 29,937,000 | 81.85% | 0.04% |
| April 5, 2023 | OLIVER DAVID R JR | Director | A | Common Stock | 11627 | $0.00 | 54,228.0000 | 29,937,000 | 27.29% | 0.04% |
| April 5, 2023 | House Arthur H | Director | A | Common Stock | 11627 | $0.00 | 42,184.0000 | 29,937,000 | 38.05% | 0.04% |