John W Kosiba JR insider trades: American Superconductor (AMSC) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where John reports to the SEC
Open-market buys and sales
27 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Jun 11, 2026 | AMSC | ↓ Sell | 6,769 | $37.46 | $254K | Direct | Jun 11, 2026 (0d) |
| Jun 8, 2026 | AMSC | ↓ Sell | 4,835 | $41.77 | $202K | Direct | Jun 10, 2026 (2d) |
| Jun 3, 2026 | AMSC | ↓ Sell | 36,909 | $50.45 | $1.9M | Direct | Jun 3, 2026 (0d) |
| Aug 4, 2025 | AMSC | ↓ Sell | 50,000 | $54.59 | $2.7M | Direct | Aug 6, 2025 (2d) |
| Aug 4, 2025 | AMSC | ↓ Sell | 9,843 | $55.26 | $544K | By 401(k) plan | Aug 6, 2025 (2d) |
| Jun 11, 2025 | AMSC | ↓ Sell | 6,642 | $28.57 | $190K | Direct | Jun 12, 2025 (1d) |
| Jun 6, 2025 | AMSC | ↓ Sell | 4,744 | $31.83 | $151K | Direct | Jun 9, 2025 (3d) |
| May 27, 2025 | AMSC | ↓ Sell | 50,000 | $26.40 | $1.3M | Direct | May 29, 2025 (2d) |
| May 20, 2025 | AMSC | ↓ Sell | 11,860 | $24.50 | $291K | Direct | May 22, 2025 (2d) |
| Nov 4, 2024 | AMSC | ↓ Sell | 50,000 | $28.28 | $1.4M | Direct | Nov 6, 2024 (2d) |
| Jun 11, 2024 | AMSC | ↓ Sell | 32,000 | $21.68 | $694K | Direct | Jun 12, 2024 (1d) |
| May 21, 2024 | AMSC | ↓ Sell | 29,000 | $14.82 | $430K | Direct | May 23, 2024 (2d) |
| Jun 22, 2023 | AMSC | ↓ Sell | 80,010 | $6.08 | $486K | Direct | Jun 23, 2023 (1d) |
| Dec 16, 2022 | AMSC | ↑ Buy | 15,000 | $3.50 | $52K | Direct | Dec 19, 2022 (3d) |
| Dec 12, 2022 | AMSC | ↑ Buy | 25,000 | $3.34 | $83K | Direct | Dec 13, 2022 (1d) |
| Jun 10, 2022 | AMSC | ↓ Sell | 8,473 | $5.97 | $51K | Direct | Jun 13, 2022 (3d) |
| May 31, 2022 | AMSC | ↓ Sell | 13,325 | $5.45 | $73K | Direct | Jun 2, 2022 (2d) |
| Dec 10, 2021 | AMSC | ↓ Sell | 22,754 | $11.31 | $257K | Direct | Dec 13, 2021 (3d) |
| Nov 2, 2021 | AMSC | ↓ Sell | 11,008 | $18.85 | $207K | Direct | Nov 2, 2021 (0d) |
| Jul 1, 2021 | AMSC | ↓ Sell | 6,409 | $17.66 | $113K | Direct | Jul 6, 2021 (5d) |
| May 24, 2021 | AMSC | ↓ Sell | 5,794 | $14.18 | $82K | Direct | May 24, 2021 (0d) |
| Jan 21, 2021 | AMSC | ↓ Sell | 25,094 | $27.55 | $691K | Direct | Jan 22, 2021 (1d) |
| Nov 25, 2020 | AMSC | ↓ Sell | 25,000 | $19.28 | $482K | Direct | Nov 30, 2020 (5d) |
| Dec 19, 2019 | AMSC | ↓ Sell | 10,287 | $7.63 | $78K | Direct | Dec 23, 2019 (4d) |
| Dec 28, 2018 | AMSC | ↓ Sell | 12,374 | $10.31 | $128K | Direct | Jan 2, 2019 (5d) |
| Dec 7, 2018 | AMSC | ↓ Sell | 6,250 | $10.58 | $66K | Direct | Dec 11, 2018 (4d) |
| May 10, 2017 | AMSC | ↑ Buy | 6,250 | $4.00 | $25K | Direct | May 12, 2017 (2d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other AMSC insiders
Open-market trades in the last 12 months
About John W Kosiba JR's insider trades
John W Kosiba JR is SVP, CFO & Treasurer at American Superconductor (AMSC). Since May 10, 2017, John has reported 3 open-market purchases worth $161K and 24 sales worth $12.8M on SEC Form 4. In the last 12 months: 3 sales ($2.3M).
Their filings also include shares withheld for taxes (13 filings), grants and awards (12 filings), shares returned to the company (3 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every AMSC insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.