Kosiba John W JR insider trades
Kosiba John W JR has filed 24 Form 4s with the SEC that we hold, all for American Superconductor Corp /DE/ (AMSC), as SVP, CFO & Treasurer. Across all of them we count 2 purchases worth $136.0K and 33 sales worth $11.3M reported on Form 4. In the last 12 months: 0 purchases ($0) and 11 sales ($2.3M). The largest single trade was a sale of 34,260 shares of American Superconductor Corp /DE/ worth $1.9M, dated 2025-08-04. The first filing on our record is dated 2021-07-06 and the latest 2026-06-11.
American Superconductor Corp /DE/ (AMSC)
SVP, CFO & Treasurer · 24 filings · 35 purchases and sales
| Trade date | Code | Shares | Value as filed | Filed | Source |
|---|---|---|---|---|---|
| 2021-07-01 | S, sale reported on Form 4 | 6,409 | $113.2K | 2021-07-06 | SEC |
| 2021-11-01 | S, sale reported on Form 4 | 3,766 | $71.4K | 2021-11-02 | SEC |
| 2021-11-02 | S, sale reported on Form 4 | 6,983 | $131.1K | 2021-11-02 | SEC |
| 2021-11-02 | S, sale reported on Form 4 | 259 | $5.0K | 2021-11-02 | SEC |
| 2021-12-10 | S, sale reported on Form 4 | 22,754 | $257.3K | 2021-12-13 | SEC |
| 2022-05-31 | S, sale reported on Form 4 | 13,325 | $72.6K | 2022-06-02 | SEC |
| 2022-06-10 | S, sale reported on Form 4 | 8,473 | $50.6K | 2022-06-13 | SEC |
| 2022-12-12 | P, purchase reported on Form 4 | 25,000 | $83.5K | 2022-12-13 | SEC |
| 2022-12-16 | P, purchase reported on Form 4 | 15,000 | $52.5K | 2022-12-19 | SEC |
| 2023-06-21 | S, sale reported on Form 4 | 50,132 | $308.3K | 2023-06-23 | SEC |
| 2023-06-22 | S, sale reported on Form 4 | 29,878 | $177.8K | 2023-06-23 | SEC |
| 2024-05-21 | S, sale reported on Form 4 | 2,170 | $33.2K | 2024-05-23 | SEC |
| 2024-05-21 | S, sale reported on Form 4 | 26,830 | $396.5K | 2024-05-23 | SEC |
| 2024-06-11 | S, sale reported on Form 4 | 32,000 | $693.8K | 2024-06-12 | SEC |
| 2024-11-04 | S, sale reported on Form 4 | 50,000 | $1.4M | 2024-11-06 | SEC |
| 2025-05-20 | S, sale reported on Form 4 | 11,860 | $290.6K | 2025-05-22 | SEC |
| 2025-05-27 | S, sale reported on Form 4 | 39,903 | $1.1M | 2025-05-29 | SEC |
| 2025-05-27 | S, sale reported on Form 4 | 10,097 | $258.0K | 2025-05-29 | SEC |
| 2025-06-06 | S, sale reported on Form 4 | 4,744 | $151.0K | 2025-06-09 | SEC |
| 2025-06-11 | S, sale reported on Form 4 | 6,342 | $181.1K | 2025-06-12 | SEC |
| 2025-06-11 | S, sale reported on Form 4 | 300 | $8.7K | 2025-06-12 | SEC |
| 2025-08-04 | S, sale reported on Form 4 | 9,843 | $543.9K | 2025-08-06 | SEC |
| 2025-08-04 | S, sale reported on Form 4 | 34,260 | $1.9M | 2025-08-06 | SEC |
| 2025-08-04 | S, sale reported on Form 4 | 15,740 | $867.7K | 2025-08-06 | SEC |
| 2026-06-02 | S, sale reported on Form 4 | 5,704 | $282.1K | 2026-06-03 | SEC |
| 2026-06-02 | S, sale reported on Form 4 | 600 | $31.3K | 2026-06-03 | SEC |
| 2026-06-02 | S, sale reported on Form 4 | 12,036 | $619.5K | 2026-06-03 | SEC |
| 2026-06-02 | S, sale reported on Form 4 | 12,122 | $613.6K | 2026-06-03 | SEC |
| 2026-06-03 | S, sale reported on Form 4 | 2,638 | $130.0K | 2026-06-03 | SEC |
| 2026-06-03 | S, sale reported on Form 4 | 609 | $31.0K | 2026-06-03 | SEC |
| 2026-06-03 | S, sale reported on Form 4 | 3,200 | $154.6K | 2026-06-03 | SEC |
| 2026-06-08 | S, sale reported on Form 4 | 3,286 | $136.4K | 2026-06-10 | SEC |
| 2026-06-08 | S, sale reported on Form 4 | 1,549 | $65.6K | 2026-06-10 | SEC |
| 2026-06-11 | S, sale reported on Form 4 | 5,026 | $187.6K | 2026-06-11 | SEC |
| 2026-06-11 | S, sale reported on Form 4 | 1,743 | $66.0K | 2026-06-11 | SEC |
Source
Counted from the Form 4 filings this reporting owner (SEC CIK 1703463) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.
