(AMSC)

Reporting relationship: Director
Issuer ticker: AMSC
Reported as of: 06 Aug 2025
Net transaction value: -$428,101
SEC form: 4
Accepted by SEC: 08 Aug 2025, 16:15:14 UTC
Prior SEC filing: 04 Apr 2025
Next SEC filing: 07 Apr 2026
Source filing: View source filing
Reporting owner signature: /s/ John R. Samia, Attorney-in-Fact

Key filing fact

Arthur H. House filed Form 4 for AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC) on 08 Aug 2025.

Key facts

This page summarizes Arthur H. House's Form 4 filing for AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 08 Aug 2025, 16:15.

Change

Previous filing in this sequence was filed on 04 Apr 2025.
Current net transaction value: -$428,101.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001685155 Primary reporting owner

House Arthur H

Relationship: Director
Address: C/O AMERICAN SUPERCONDUCTOR CORPORATION, 114 EAST MAIN ST, AYER
Signature: /s/ John R. Samia, Attorney-in-Fact
Signature date: 08 Aug 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

AMSC transaction

Common Stock

Options Exercise

Transaction value: $65,980
Shares: +9,703
Change %: +20%
Price: $6.80
Shares after: 58,366
Date: 06 Aug 2025
Ownership: Direct

AMSC transaction

Common Stock

Sale

Transaction value: $494,082
Shares: -9,703
Change %: -17%
Price: $50.92
Shares after: 48,663
Date: 08 Aug 2025
Ownership: Direct
Footnotes: F1, F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

AMSC transaction Derivative

Stock Options (Right to Buy)

Options Exercise

Transaction value: $0
Shares: -9,703
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 06 Aug 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 9,703
Exercise price: $6.80
Footnotes: F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

The sales reported on this Form 4 were made by the reporting person for tax and estate planning purposes.

Footnote F2

Following all the transactions reported on this Form 4, the reporting person holds 48,663 shares directly.

Footnote F3

The stock option was automatically granted under the Amended and Restated 2007 Director Stock Plan on the third business day following the reporting person's election to the Board. The stock option vested in two equal annual installments beginning September 20, 2017, and became fully vested and exerciseable on September 20, 2018.