American Superconductor Corp (AMSC) · Insider trading
What American Superconductor's directors, officers and largest holders bought and sold themselves, from the Form 4 each of them files with the SEC within two business days of a trade. Open-market purchases and sales first: those are the trades somebody chose to make at the market price.
Bought, 12 months
$0
0 insiders, 0 trades
Sold, 12 months
$7.80M
4 insiders, 98% under a plan
Net, 12 months
−$7.80M
bought less sold
Latest filing
2026-09-21
filings read to 2026-10-19
Who traded, two years
| Insider | Bought | Sold | Trades | Last trade | Holds after |
|---|---|---|---|---|---|
| McGahn Daniel PDirector, Chairman, President and CEO | – | $14.98M | 20 | 2026-06-11 | 1,136,538 |
| Kosiba John W JrSVP, CFO & Treasurer | – | $8.96M | 21 | 2026-06-11 | 336,120 |
| House Arthur HDirector | – | $494,077 | 1 | 2025-08-08 | 48,663 |
| Dambier Laura A.Director | – | $150,520 | 1 | 2026-06-11 | 14,992 |
| Oliver David R JrDirector | – | $6,820 | 1 | 2026-02-24 | 60,707 |
Open-market purchases and sales
Newest first. “Plan” marks a trade made under a 10b5-1 plan set up in advance.
| Date | Insider | Trade | Shares | Price | Value | Holds after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-06-11 | Dambier Laura A.Director | Sale | 4,000 | 37.63 | $150,520 | 14,992 | Form 4 |
| 2026-06-11 | McGahn Daniel PDirector, Chairman, President and CEO | Saleplan | 11,508 | 37.28 | $429,018 | 1,136,538 | Form 4 |
| 2026-06-11 | McGahn Daniel PDirector, Chairman, President and CEO | Saleplan | 4,609 | 37.85 | $174,451 | 1,131,929 | Form 4 |
| 2026-06-11 | Kosiba John W JrSVP, CFO & Treasurer | Saleplan | 5,026 | 37.33 | $187,621 | 336,120 | Form 4 |
| 2026-06-11 | Kosiba John W JrSVP, CFO & Treasurer | Saleplan | 1,743 | 37.85 | $65,973 | 334,377 | Form 4 |
| 2026-06-08 | McGahn Daniel PDirector, Chairman, President and CEO | Saleplan | 4,992 | 41.39 | $206,619 | 1,152,724 | Form 4 |
| 2026-06-08 | McGahn Daniel PDirector, Chairman, President and CEO | Saleplan | 4,678 | 42.19 | $197,365 | 1,148,046 | Form 4 |
| 2026-06-08 | Kosiba John W JrSVP, CFO & Treasurer | Saleplan | 3,286 | 41.50 | $136,369 | 342,695 | Form 4 |
| 2026-06-08 | Kosiba John W JrSVP, CFO & Treasurer | Saleplan | 1,549 | 42.35 | $65,600 | 341,146 | Form 4 |
| 2026-06-03 | McGahn Daniel PDirector, Chairman, President and CEO | Saleplan | 7,075 | 48.31 | $341,793 | 1,163,534 | Form 4 |
| 2026-06-03 | McGahn Daniel PDirector, Chairman, President and CEO | Saleplan | 4,501 | 49.25 | $221,674 | 1,159,033 | Form 4 |
| 2026-06-03 | McGahn Daniel PDirector, Chairman, President and CEO | Saleplan | 500 | 50.29 | $25,145 | 1,158,533 | Form 4 |
| 2026-06-03 | McGahn Daniel PDirector, Chairman, President and CEO | Saleplan | 817 | 50.99 | $41,659 | 1,157,716 | Form 4 |
| 2026-06-03 | Kosiba John W JrSVP, CFO & Treasurer | Saleplan | 3,200 | 48.31 | $154,592 | 349,228 | Form 4 |
| 2026-06-03 | Kosiba John W JrSVP, CFO & Treasurer | Saleplan | 2,638 | 49.28 | $130,001 | 346,590 | Form 4 |
| 2026-06-03 | Kosiba John W JrSVP, CFO & Treasurer | Saleplan | 609 | 50.83 | $30,955 | 345,981 | Form 4 |
| 2026-06-02 | McGahn Daniel PDirector, Chairman, President and CEO | Saleplan | 13,762 | 49.45 | $680,531 | 1,229,372 | Form 4 |
| 2026-06-02 | McGahn Daniel PDirector, Chairman, President and CEO | Saleplan | 27,900 | 50.63 | $1.41M | 1,201,472 | Form 4 |
| 2026-06-02 | McGahn Daniel PDirector, Chairman, President and CEO | Saleplan | 28,558 | 51.46 | $1.47M | 1,172,914 | Form 4 |
| 2026-06-02 | McGahn Daniel PDirector, Chairman, President and CEO | Saleplan | 2,305 | 52.14 | $120,183 | 1,170,609 | Form 4 |
| 2026-06-02 | Kosiba John W JrSVP, CFO & Treasurer | Saleplan | 5,704 | 49.46 | $282,120 | 377,186 | Form 4 |
| 2026-06-02 | Kosiba John W JrSVP, CFO & Treasurer | Saleplan | 12,122 | 50.62 | $613,616 | 365,064 | Form 4 |
| 2026-06-02 | Kosiba John W JrSVP, CFO & Treasurer | Saleplan | 12,036 | 51.47 | $619,493 | 353,028 | Form 4 |
| 2026-06-02 | Kosiba John W JrSVP, CFO & Treasurer | Saleplan | 600 | 52.19 | $31,314 | 352,428 | Form 4 |
| 2026-02-24 | Oliver David R JrDirector | Sale | 200 | 34.10 | $6,820 | 60,707 | Form 4 |
| 2025-08-08 | House Arthur HDirector | Sale | 9,703 | 50.92 | $494,077 | 48,663 | Form 4 |
| 2025-08-04 | Kosiba John W JrSVP, CFO & Treasurer | Sale | 34,260 | 54.34 | $1.86M | 368,630 | Form 4 |
| 2025-08-04 | Kosiba John W JrSVP, CFO & Treasurer | Sale | 15,740 | 55.13 | $867,746 | 352,890 | Form 4 |
| 2025-08-04 | Kosiba John W JrSVP, CFO & Treasurer | Saleindirect | 9,843 | 55.26 | $543,924 | 0 | Form 4 |
| 2025-08-04 | McGahn Daniel PDirector, Chairman, President and CEO | Sale | 73,105 | 54.26 | $3.97M | 1,210,877 | Form 4 |
| 2025-08-04 | McGahn Daniel PDirector, Chairman, President and CEO | Sale | 27,743 | 55.11 | $1.53M | 1,183,134 | Form 4 |
| 2025-06-11 | Kosiba John W JrSVP, CFO & Treasurer | Saleplan | 6,342 | 28.55 | $181,064 | 403,190 | Form 4 |
| 2025-06-11 | Kosiba John W JrSVP, CFO & Treasurer | Saleplan | 300 | 29.08 | $8,724 | 402,890 | Form 4 |
| 2025-06-11 | McGahn Daniel PDirector, Chairman, President and CEO | Saleplan | 12,315 | 28.56 | $351,716 | 1,284,482 | Form 4 |
| 2025-06-11 | McGahn Daniel PDirector, Chairman, President and CEO | Saleplan | 500 | 29.09 | $14,545 | 1,283,982 | Form 4 |
| 2025-06-06 | McGahn Daniel PDirector, Chairman, President and CEO | Saleplan | 7,689 | 31.82 | $244,664 | 1,296,797 | Form 4 |
| 2025-06-06 | Kosiba John W JrSVP, CFO & Treasurer | Saleplan | 4,744 | 31.83 | $151,002 | 409,532 | Form 4 |
| 2025-05-27 | Kosiba John W JrSVP, CFO & Treasurer | Saleplan | 10,097 | 25.55 | $257,978 | 454,179 | Form 4 |
| 2025-05-27 | Kosiba John W JrSVP, CFO & Treasurer | Saleplan | 39,903 | 26.61 | $1.06M | 414,276 | Form 4 |
| 2025-05-27 | McGahn Daniel PDirector, Chairman, President and CEO | Saleplan | 24,506 | 25.55 | $626,128 | 1,402,635 | Form 4 |
4 more
| 2025-05-27 | McGahn Daniel PDirector, Chairman, President and CEO | Saleplan | 98,149 | 26.60 | $2.61M | 1,304,486 | Form 4 |
| 2025-05-20 | McGahn Daniel PDirector, Chairman, President and CEO | Saleplan | 12,815 | 24.49 | $313,839 | 1,427,141 | Form 4 |
| 2025-05-20 | Kosiba John W JrSVP, CFO & Treasurer | Saleplan | 11,860 | 24.50 | $290,570 | 464,276 | Form 4 |
| 2024-11-04 | Kosiba John W JrSVP, CFO & Treasurer | Sale | 50,000 | 28.28 | $1.41M | 356,136 | Form 4 |
Grants, exercises and other transactions
Pay, tax and paperwork rather than a choice to trade at the market price. Two years.
16 × grant or award1 × option exercise
Show them
| Date | Insider | What | Shares | Price | Holds after | Filing |
|---|---|---|---|---|---|---|
| 2026-09-18 | Littlefield Barbara G.Director | Grant or award A | +1,607 | – | 37,034 | Form 4 |
| 2026-06-01 | McGahn Daniel PDirector, Chairman, President and CEO | Grant or award A | +60,000 | – | 1,243,134 | Form 4 |
| 2026-06-01 | Kosiba John W JrSVP, CFO & Treasurer | Grant or award A | +30,000 | – | 382,890 | Form 4 |
| 2026-04-03 | Dambier Laura A.Director | Grant or award A | +3,116 | – | 18,992 | Form 4 |
| 2026-04-03 | House Arthur HDirector | Grant or award A | +3,116 | – | 51,779 | Form 4 |
| 2026-04-03 | Klein Margaret D.Director | Grant or award A | +3,116 | – | 19,492 | Form 4 |
| 2026-04-03 | Littlefield Barbara G.Director | Grant or award A | +3,116 | – | 35,427 | Form 4 |
| 2026-04-03 | Oliver David R JrDirector | Grant or award A | +3,116 | – | 63,823 | Form 4 |
| 2026-04-03 | Donnelly Terence RobertDirector | Grant or award A | +2,665 | – | 2,665 | Form 4 |
| 2025-08-06 | House Arthur HDirector | Option exercise M | +9,703 | 6.80 | 58,366 | Form 4 |
| 2025-05-15 | McGahn Daniel PDirector, Chairman, President and CEO | Grant or award A | +240,000 | – | 1,439,956 | Form 4 |
| 2025-05-15 | Kosiba John W JrSVP, CFO & Treasurer | Grant or award A | +120,000 | – | 476,136 | Form 4 |
| 2025-04-03 | Dambier Laura A.Director | Grant or award A | +2,639 | – | 15,876 | Form 4 |
| 2025-04-03 | House Arthur HDirector | Grant or award A | +2,639 | – | 48,663 | Form 4 |
| 2025-04-03 | Klein Margaret D.Director | Grant or award A | +2,639 | – | 15,876 | Form 4 |
| 2025-04-03 | Littlefield Barbara G.Director | Grant or award A | +2,639 | – | 32,311 | Form 4 |
| 2025-04-03 | Oliver David R JrDirector | Grant or award A | +2,639 | – | 60,707 | Form 4 |
How to read it
- Buy, sale
- Code P and S on the form: shares bought or sold in the market, at the market price. The other codes are mostly pay (a grant, an option exercised) or tax (shares the company withheld), and say little about what the insider thinks of the price.
- Plan
- A sale or purchase under a Rule 10b5-1 plan, set up in advance and running on its own schedule. Since April 2023 the form has a box for it. Much executive selling is planned and says more about diversifying than about the company.
- Holds after
- The shares the insider still held after the trade, in the form the trade was in (directly, or indirectly through a trust or a fund).
- Value
- Shares times the price the form reports, which is often an average over several fills on the day.
Read from the SEC's own quarterly data sets of Forms 3, 4 and 5, and from each day's filings since the last one. A correcting amendment replaces the lines it restates. Every row links to its filing. None of this is advice: insiders sell for many reasons, and buy for fewer.