34 transactions on file (0 open-market purchases and 5 open-market sales on this page).
| Date | Insider | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-06-11 | Dambier Laura A. Director Open-market sale | Open-market sale | −4,000 | $37.63 | −150.52K | 14,992 |
| 2026-06-11 | Kosiba John W JR SVP, CFO & Treasurer Open-market sale | Open-market sale | −5,026 | $37.33 | −187.6K | 336,120 |
| 2026-06-11 | Kosiba John W JR SVP, CFO & Treasurer Open-market sale | Open-market sale | −1,743 | $37.85 | −65.98K | 334,377 |
| 2026-06-11 | McGahn Daniel P Chairman, President and CEO · Director Open-market sale | Open-market sale | −11,508 | $37.28 | −429.05K | 1,136,538 |
| 2026-06-11 | McGahn Daniel P Chairman, President and CEO · Director Open-market sale | Open-market sale | −4,609 | $37.85 | −174.46K | 1,131,929 |
29 more transactions are on Measure
The assistant answers from what AMSC has actually filed: 21 annual reports filed with the SEC, 33 Form 4 filings from the last year, 13F positions from the 1 tracked investor who hold it and 2 funds that hold it. Every figure in a reply links to the filing it came from, so an answer can be checked rather than believed.
Pressing one answers it here, from AMSC's filings and figures. One a day without an account; a free account has its own, and no card.
See every Form 4 AMSC insiders have filed, not the latest few.
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Source
From SEC Form 4 filings, filed by officers, directors and 10%-owners within two business days of a transaction. “Indirect” holdings (a trust, an LLC, a family member) are included and not distinguished from direct ones in this table.
Past transactions say nothing about future ones, and none of this is investment advice.
See who bought, not who was handed shares
Every Form 4 AMSC insiders file, not just the latest handful, with vesting and tax withholding struck out so what's left reads as a decision.
Every filingMeasure
Follow the investors who hold it
Each stake priced at the quarter it was filed, and diffed against the quarter before: who added, who trimmed, who left.
Every position they holdMeasure
Ask what a run of filings adds up to
Whether this is one decision or a pattern, and how it compares with AMSC's own history of insider activity.
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