Was the AMSC stock grant to Arthur H. House related to a company compensation plan?

Yes. The award of immediately vested common shares was made under American Superconductor’s Amended and Restated 2007 Director Stock Plan. This indicates the grant is part of the company’s standard director compensation framework rather than a discretionary market transaction.

Does this Form 4 show any American Superconductor (AMSC) share sales by Arthur H. House?

No share sales are reported in this Form 4. The filing shows only one acquisition transaction, a grant of 3,116 immediately vested common shares as director compensation, with no corresponding dispositions or open-market sales listed in the transaction summary.

Director at American Superconductor (NASDAQ: AMSC) awarded new shares

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

House Arthur H reported acquisition or exercise transactions in this Form 4 filing.

AMERICAN SUPERCONDUCTOR CORP director Arthur H. House received a stock grant of 3,116 common shares as compensation. The award consisted of immediately vested shares issued at no cash cost to him under the company’s Amended and Restated 2007 Director Stock Plan. Following this grant, he directly holds 51,779 shares of AMERICAN SUPERCONDUCTOR common stock.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider House Arthur H

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	3,116	$0.00	--

Holdings After Transaction: Common Stock — 51,779 shares (Direct)

Footnotes (1)

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. Following all the transactions reported on this Form 4, the reporting person holds 51,779 shares directly.

Key Figures

Shares granted: 3,116 shares Grant price per share: $0.00 per share Shares held after transaction: 51,779 shares +2 more

5 metrics

Shares granted 3,116 shares Director stock award of common stock

Grant price per share $0.00 per share Reported transaction price for the stock grant

Shares held after transaction 51,779 shares Total direct ownership following all Form 4 transactions

Transaction date 2026-04-03 Date of director stock grant

Transaction code A Grant, award, or other acquisition of non-derivative common stock

Key Terms

Form 4, immediately vested, Director Stock Plan, Grant, award, or other acquisition

4 terms

Form 4 regulatory

"Following all the transactions reported on this Form 4, the reporting person holds 51,779 shares directly."

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

immediately vested financial

"This award of immediately vested shares of American Superconductor Corporation common stock was made in accordance with the Company's plan."

Director Stock Plan financial

"This award of immediately vested shares was made in accordance with the Company's Amended and Restated 2007 Director Stock Plan, as Amended."

Grant, award, or other acquisition financial

"The transaction code description is Grant, award, or other acquisition for the common stock transaction."

Form 4 Insider Transactions: What Each Field Means →

04/07/2026 - 05:35 PM

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

House Arthur H

(Last)

(First)

(Middle)

C/O AMERICAN SUPERCONDUCTOR CORPORATION

114 EAST MAIN ST

(Street)

AYER

MASSACHUSETTS

01432

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
AMERICAN SUPERCONDUCTOR CORP /DE/ [ AMSC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
	Officer (give title below)	Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/03/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	04/03/2026⁽¹⁾		A		3,116	A	$0	51,779⁽²⁾	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. 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.

2. Following all the transactions reported on this Form 4, the reporting person holds 51,779 shares directly.

	/s/ John R. Samia, Attorney-in-Fact	04/07/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did AMSC director Arthur H. House report on this Form 4?

Arthur H. House reported receiving a grant of 3,116 shares of American Superconductor common stock. The filing describes this as a grant or award transaction, reflecting director compensation rather than an open-market trade, and states the shares vested immediately upon grant.

How many American Superconductor (AMSC) shares did Arthur H. House receive and at what price?

He received 3,116 shares of American Superconductor common stock at a reported price of $0.00 per share. This indicates a share-based compensation award rather than a purchase, consistent with the description of a grant or award acquisition in the filing.

What is Arthur H. House’s total American Superconductor (AMSC) shareholding after this transaction?

After the reported grant, Arthur H. House directly holds 51,779 shares of American Superconductor common stock. The footnotes specify that this total reflects all transactions reported in the Form 4, giving a clear picture of his direct ownership position.