Form 4 for AMSC AMERICAN SUPERCONDUCTOR CORP /DE/
Accepted 2026-06-11 16:31:39 ET · period of report 2026-06-11 · accession 0001193125-26-267677 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| MT | 2026-06-11 16:31 | 2026-06-11 | AMSC | Kosiba John W JR | SVP, CFO, Treas | S - Sale | $37.46 | -6,769 | 334.4K | -2% | -$253.6K |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-06-11 | S | D | 5,026 | $37.33 | 336,120 | D | — | — | (F1) Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan previously entered into by the reporting person on August 15, 2025. (F2) The sales were executed in multiple trades at prices ranging from $36.775-$37.73. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected. |
| 2 | Common | Common Stock | 2026-06-11 | S | D | 1,743 | $37.85 | 334,377 | D | — | — | (F1) Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan previously entered into by the reporting person on August 15, 2025. (F3) The sales were executed in multiple trades at prices ranging from $37.82-$38.06. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected. (F4) Following all the transactions reported on this Form 4, the reporting person holds 334,377 shares directly. |