SEC Form 4 · accession 0001193125-26-265996
AMERICAN SUPERCONDUCTOR CORP /DE/ · AMSC
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
John W Kosiba Jr.
Officer — SVP, CFO & Treasurer
Period of report
Jun 8, 2026
Accepted (ET)
Jun 10, 2026 · 4:55 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
Issuer CIK
0000880807
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF2 | Jun 8, 2026 | S | 3,286 | $41.5007 | D | 342,695 | D | |
| Common StockF3,F4 | Jun 8, 2026 | S | 1,549 | $42.347 | D | 341,146 | D | |
| Common StockF5 | holding | — | — | — | 371 | I | By 401(k) plan |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1Represents 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.
- F2The sales were executed in multiple trades at prices ranging from $40.94-$41.90. 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.
- F3The sales were executed in multiple trades at prices ranging from $41.94-$42.86. 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.
- F4Following all the transactions reported on this Form 4, the reporting person holds 341,146 shares directly.
- F5Following all the transactions reported on this Form 4, the reporting person holds 371 shares indirectly through the company's 401(k) plan as of June 10, 2026.