American Superconductor Corp

AMSC· Nasdaq

Since Oct 4, 2025

Transactions: 25
Purchases: 0
Sales: 25
Purchase value: $0.00
Sale value: $7.80M

Values are shares multiplied by reported price when both were supplied, each trade counted once however many filers reported it.

Dambier Laura A.Director

Filed Jun 12, 2026Period of report Jun 11, 20260001193125-26-269433

Transaction	Security	Shares	Price	ValueValue (shares × price)	Held after	Ownership
SaleJun 11, 2026	Common Stock^F1^F2	4,000	$37.63	$150.52K	14,992	Direct

Filing footnotes · 2

F1The sales reported on this Form 4 were made by the reporting person for tax planning purposes.
F2Following all the transactions reported on this Form 4, the reporting person holds 14,992 shares directly.

Open on SEC EDGAR

Kosiba John W JRSVP, CFO & Treasurer

4Rule 10b5-1 plan disclosed

Filed Jun 11, 2026Period of report Jun 11, 20260001193125-26-267677

Transaction	Security	Shares	Price	ValueValue (shares × price)	Held after	Ownership
Sale

McGahn Daniel PDirector · Chairman, President and CEO

4Rule 10b5-1 plan disclosed

Filed Jun 11, 2026Period of report Jun 11, 20260001193125-26-267642

Transaction	Security	Shares	Price	ValueValue (shares × price)	Held after	Ownership
Sale

Kosiba John W JRSVP, CFO & Treasurer

4Rule 10b5-1 plan disclosed

Filed Jun 10, 2026Period of report Jun 8, 20260001193125-26-265996

Transaction	Security	Shares	Price	ValueValue (shares × price)	Held after	Ownership
Sale

McGahn Daniel PDirector · Chairman, President and CEO

4Rule 10b5-1 plan disclosed

Filed Jun 10, 2026Period of report Jun 8, 20260001193125-26-265990

Transaction	Security	Shares	Price	ValueValue (shares × price)	Held after	Ownership
Sale

Kosiba John W JRSVP, CFO & Treasurer

4Rule 10b5-1 plan disclosed

Filed Jun 3, 2026Period of report Jun 1, 20260001193125-26-255471

Transaction	Security	Shares	Price	ValueValue (shares × price)	Held after	Ownership
Sale

McGahn Daniel PDirector · Chairman, President and CEO

4Rule 10b5-1 plan disclosed

Filed Jun 3, 2026Period of report Jun 1, 20260001193125-26-255450

Transaction	Security	Shares	Price	ValueValue (shares × price)	Held after	Ownership
Sale

Oliver David R JRDirector

Filed Feb 26, 2026Period of report Feb 24, 20260001193125-26-077349

Transaction	Security	Shares	Price	ValueValue (shares × price)	Held after	Ownership
SaleFeb 24, 2026	Common Stock^F1^F2	200	$34.10	$6.82K	60,707

P and S transaction codes only. Grants, gifts, option exercises, tax withholding, and Form 144 notices are not counted as purchases or sales. A row whose filed price fails a plausibility check, or that is not common stock, is listed but left out of the values; a trade reported by several filers is counted once.

Filing footnotes · 11

F1The restricted stock award was granted on June 1, 2026. The award will vest in three equal annual installments beginning June 10, 2027.
F10Following all the transactions reported on this Form 4, the reporting person holds 345,981 shares directly.
F11Following all the transactions reported on this Form 4, the reporting person holds 320 shares indirectly through the company's 401(k) plan as of June 3, 2026.
F2Represents 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.
F3The sales were executed in multiple trades at prices ranging from $48.95-$49.87. 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 price at which the transaction was effected.
F4The sales were executed in multiple trades at prices ranging from $49.99-$50.95. 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 price at which the transaction was effected.
F5The sales were executed in multiple trades at prices ranging from $50.99-$51.90. 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 price at which the transaction was effected.
F6The sales were executed in multiple trades at prices ranging from $52.00-$52.37. 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 price at which the transaction was effected.
F7The sales were executed in multiple trades at prices ranging from $47.80-$48.76. 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.
F8The sales were executed in multiple trades at prices ranging from $48.87-$49.62. 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.
F9The sales were executed in multiple trades at prices ranging from $50.35-$50.99. 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.

Filing footnotes · 11

F1The restricted stock award was granted on June 1, 2026. The award will vest in three equal annual installments beginning June 10, 2027.
F10Following all the transactions reported on this Form 4, the reporting person holds 1,157,716 shares directly.
F11Following all the transactions reported on this Form 4, the reporting person holds 13,262 shares indirectly through the company's 401(k) plan as of June 3, 2026.
F2Represents 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, as modified on February 26, 2026.
F3The sales were executed in multiple trades at prices ranging from $48.95-$49.87. 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 price at which the transaction was effected.
F4The sales were executed in multiple trades at prices ranging from $49.99-$50.98. 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 price at which the transaction was effected.
F5The sales were executed in multiple trades at prices ranging from $50.99-$51.945. 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 price at which the transaction was effected.
F6The sales were executed in multiple trades at prices ranging from $52.00-$52.44. 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 price at which the transaction was effected.
F7The sales were executed in multiple trades at prices ranging from $47.80-$48.76. 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.
F8The sales were executed in multiple trades at prices ranging from $48.87-$49.84. 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.
F9The sales were executed in multiple trades at prices ranging from $49.89-$50.82. 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.