Key facts
- This page summarizes Arthur H. House's Form 4 filing for AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC).
- 1 reported transaction and 0 derivative rows are listed below.
- Accepted by SEC: 07 Apr 2026, 17:35.
Arthur H. House - 03 Apr 2026 Form 4 Insider Report for AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC)
- Reporting relationship
- Director
- Issuer ticker
- AMSC
- Reported as of
- 03 Apr 2026
- Net transaction value
- $0
- SEC form
- 4
- Accepted by SEC
- 07 Apr 2026, 17:35:45 UTC
- Prior SEC filing
- 08 Aug 2025
- Source filing
- View source filing
- Reporting owner signature
- /s/ John R. Samia, Attorney-in-Fact
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Arthur H. House filed Form 4 for AMERICAN SUPERCONDUCTOR CORP /DE/ (AMSC) on 07 Apr 2026.
Change
- Previous filing in this sequence was filed on 08 Aug 2025.
- Current net transaction value: $0.
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
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
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
- 07 Apr 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
AMSC
transaction
Common Stock
Award
- Transaction value
- Shares
- +3,116
- Change %
- +6.4%
- Price
- $0.000000*
- Shares after
- 51,779
- Date
- 03 Apr 2026
- Ownership
- Direct
- Footnotes
- F1, F2
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 2 footnotes
Footnote F1
This award of immediately vested shares of American Superconductor Corporation (the "Company") common stock was made in accordance with the Company's Amended and Restated 2007 Director Stock Plan, as Amended.
Footnote F2
Following all the transactions reported on this Form 4, the reporting person holds 51,779 shares directly.