AMSC insider transaction filings
AMERICAN SUPERCONDUCTOR CORP /DE/ — 35 most recent Form 4 filings from SEC EDGAR, normalized by FilingPulse. Latest filing: 2026-06-12. Screen AMSC transaction legs live →
| Filed | Form | Insider | Reported transactions | Source |
|---|---|---|---|---|
| 2026-06-12 | 4 | Dambier Laura A. — Director | Sale (S): 4,000 @ $37.63 | EDGAR |
| 2026-06-11 | 4 | Kosiba John W JR — SVP, CFO & Treasurer | Sale (S): 5,026 @ $37.33 · Sale (S): 1,743 @ $37.85 | EDGAR |
| 2026-06-11 | 4 | McGahn Daniel P — Chairman, President and CEO, Director | Sale (S): 11,508 @ $37.28 · Sale (S): 4,609 @ $37.85 | EDGAR |
| 2026-06-10 | 4 | Kosiba John W JR — SVP, CFO & Treasurer | Sale (S): 3,286 @ $41.50 · Sale (S): 1,549 @ $42.35 | EDGAR |
| 2026-06-10 | 4 | McGahn Daniel P — Chairman, President and CEO, Director | Sale (S): 4,992 @ $41.39 · Sale (S): 4,678 @ $42.19 | EDGAR |
| 2026-06-03 | 4 | Kosiba John W JR — SVP, CFO & Treasurer | Grant/award (A): 30,000 @ $0 · Sale (S): 5,704 @ $49.46 · Sale (S): 12,122 @ $50.62 · Sale (S): 12,036 @ $51.47 · Sale (S): 600 @ $52.19 · Sale (S): 3,200 @ $48.31 · +2 more | EDGAR |
| 2026-06-03 | 4 | McGahn Daniel P — Chairman, President and CEO, Director | Grant/award (A): 60,000 @ $0 · Sale (S): 13,762 @ $49.45 · Sale (S): 27,900 @ $50.63 · Sale (S): 28,558 @ $51.46 · Sale (S): 2,305 @ $52.14 · Sale (S): 7,075 @ $48.31 · +3 more | EDGAR |
| 2026-04-07 | 4 | Donnelly Terence Robert — Director | Grant/award (A): 2,665 @ $0 | EDGAR |
| 2026-04-07 | 4 | Klein Margaret D. — Director | Grant/award (A): 3,116 @ $0 | EDGAR |
| 2026-04-07 | 4 | Dambier Laura A. — Director | Grant/award (A): 3,116 @ $0 | EDGAR |
| 2026-04-07 | 4 | Littlefield Barbara G. — Director | Grant/award (A): 3,116 @ $0 | EDGAR |
| 2026-04-07 | 4 | House Arthur H — Director | Grant/award (A): 3,116 @ $0 | EDGAR |
| 2026-04-07 | 4 | OLIVER DAVID R JR — Director | Grant/award (A): 3,116 @ $0 | EDGAR |
| 2026-02-26 | 4 | OLIVER DAVID R JR — Director | Sale (S): 200 @ $34.10 | EDGAR |
| 2025-11-13 | 4 | OLIVER DAVID R JR — Director | Purchase (P): 200 @ $8.33 | EDGAR |
| 2025-08-08 | 4 | House Arthur H — Director | Option exercise (M): 9,703 @ $6.80 · Sale (S): 9,703 @ $50.92 · Option exercise (M): 9,703 (derivative) @ $0 | EDGAR |
| 2025-08-06 | 4 | Klein Margaret D. — Director | Purchase (P): 500 @ $5.57 | EDGAR |
| 2025-08-06 | 4 | Kosiba John W JR — SVP, CFO & Treasurer | Sale (S): 34,260 @ $54.34 · Sale (S): 15,740 @ $55.13 · Sale (S): 9,843 @ $55.26 | EDGAR |
| 2025-08-06 | 4 | McGahn Daniel P — Chairman, President and CEO, Director | Sale (S): 73,105 @ $54.26 · Sale (S): 27,743 @ $55.11 | EDGAR |
| 2025-06-12 | 4 | Kosiba John W JR — SVP, CFO & Treasurer | Sale (S): 6,342 @ $28.55 · Sale (S): 300 @ $29.08 | EDGAR |
| 2025-06-12 | 4 | McGahn Daniel P — Chairman, President and CEO, Director | Sale (S): 12,315 @ $28.56 · Sale (S): 500 @ $29.09 | EDGAR |
| 2025-06-09 | 4 | Kosiba John W JR — SVP, CFO & Treasurer | Sale (S): 4,744 @ $31.83 | EDGAR |
| 2025-06-09 | 4 | McGahn Daniel P — Chairman, President and CEO, Director | Sale (S): 7,689 @ $31.82 | EDGAR |
| 2025-05-29 | 4 | Donnelly Terence Robert — Director | Grant/award (A): 2,112 (derivative) @ $0 | EDGAR |
| 2025-05-29 | 4 | Kosiba John W JR — SVP, CFO & Treasurer | Sale (S): 10,097 @ $25.55 · Sale (S): 39,903 @ $26.61 | EDGAR |
| 2025-05-29 | 4 | McGahn Daniel P — Chairman, President and CEO, Director | Sale (S): 24,506 @ $25.55 · Sale (S): 98,149 @ $26.60 | EDGAR |
| 2025-05-22 | 4 | Kosiba John W JR — SVP, CFO & Treasurer | Sale (S): 11,860 @ $24.50 | EDGAR |
| 2025-05-22 | 4 | McGahn Daniel P — Chairman, President and CEO, Director | Sale (S): 12,815 @ $24.49 | EDGAR |
| 2025-05-19 | 4 | Kosiba John W JR — SVP, CFO & Treasurer | Grant/award (A): 120,000 @ $0 | EDGAR |
| 2025-05-19 | 4 | McGahn Daniel P — Chairman, President and CEO, Director | Grant/award (A): 240,000 @ $0 | EDGAR |
| 2025-04-04 | 4 | Klein Margaret D. — Director | Grant/award (A): 2,639 @ $0 | EDGAR |
| 2025-04-04 | 4 | Dambier Laura A. — Director | Grant/award (A): 2,639 @ $0 | EDGAR |
| 2025-04-04 | 4 | Littlefield Barbara G. — Director | Grant/award (A): 2,639 @ $0 | EDGAR |
| 2025-04-04 | 4 | House Arthur H — Director | Grant/award (A): 2,639 @ $0 | EDGAR |
| 2025-04-04 | 4 | OLIVER DAVID R JR — Director | Grant/award (A): 2,639 @ $0 | EDGAR |
Recent 8-K events — AMERICAN SUPERCONDUCTOR CORP /DE/
| Filed | Form | Items reported | Source |
|---|---|---|---|
| 2026-08-05 | 8-K | 2.02 — Results of Operations and Financial Condition 5.07 — Submission of Matters to a Vote of Security Holders 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-06-02 | 8-K | 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-05-27 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-02-17 | 8-K/A | 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-02-04 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-12-23 | 8-K | 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-12-10 | 8-K | 1.01 — Entry into a Material Definitive Agreement 2.01 — Completion of Acquisition or Disposition of Assets 3.02 — Unregistered Sales of Equity Securities 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-11-05 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-07-30 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2025-07-29 | 8-K | 5.07 — Submission of Matters to a Vote of Security Holders 9.01 — Financial Statements and Exhibits | EDGAR |
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