AMSC director receives 3,116-share stock grant

Littlefield Barbara G. reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Littlefield Barbara G. reported acquisition or exercise transactions in this Form 4 filing.

American Superconductor (AMSC) director Barbara G. Littlefield received a grant of 3,116 shares of common stock as compensation. The shares were immediately vested and were awarded under the company’s Amended and Restated 2007 Director Stock Plan, as amended. Following this grant, she directly holds 35,427 shares of AMSC common stock.

Insider Trade Summary

Grant/Award: 3,116 shares

Grant/Award 1 txn

Insider Littlefield Barbara G.

Role Director

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

Holdings After Transaction: Common Stock — 35,427 shares (Direct)

Footnotes (2)

1. 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.
2. F2. Following all the transactions reported on this Form 4, the reporting person holds 35,427 shares directly.

Key Figures

Shares granted: 3,116 shares Grant price per share: $0.00 per share Shares held after transaction: 35,427 shares

3 metrics

Shares granted 3,116 shares Common stock grant to director on April 3, 2026

Grant price per share $0.00 per share Director stock award, non-market acquisition

Shares held after transaction 35,427 shares Director’s direct holdings following the award

Key Terms

Grant, award, or other acquisition, immediately vested shares, Amended and Restated 2007 Director Stock Plan

3 terms

Grant, award, or other acquisition financial

"transaction_code_description: Grant, award, or other acquisition"

immediately vested shares financial

"This award of immediately vested shares of American Superconductor Corporation"

Amended and Restated 2007 Director Stock Plan financial

"in accordance with the Company's Amended and Restated 2007 Director Stock Plan, as Amended"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did AMSC director Barbara Littlefield report?

Barbara G. Littlefield reported receiving a grant of 3,116 shares of American Superconductor common stock. The shares were awarded as immediately vested stock under the company’s amended 2007 Director Stock Plan and increased her direct holdings to 35,427 shares.

How many AMSC shares does Barbara Littlefield hold after this Form 4?

Following the reported transaction, Barbara G. Littlefield directly holds 35,427 shares of American Superconductor common stock. This figure comes after the grant of 3,116 immediately vested shares awarded under the company’s Amended and Restated 2007 Director Stock Plan.

What type of shares were granted to the AMSC director in this filing?

The filing shows a grant of 3,116 shares of American Superconductor common stock to director Barbara G. Littlefield. These shares were immediately vested and issued as a grant or award, rather than a market purchase, under the company’s amended 2007 Director Stock Plan.

Was the AMSC insider transaction a market buy or a compensation grant?

The transaction was a compensation grant, not a market purchase. Barbara G. Littlefield received 3,116 immediately vested shares of American Superconductor common stock at a reported price of $0.00 per share, consistent with a director stock award under the company’s stock plan.

Under which plan did AMSC grant shares to director Barbara Littlefield?

The grant was made under American Superconductor’s Amended and Restated 2007 Director Stock Plan, as amended. The Form 4 footnote explains that 3,116 immediately vested shares of common stock were awarded to director Barbara G. Littlefield in accordance with this director stock plan.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 04/07/2026 - 05:40 PM EDT Learn about SEC filing dates

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^*

Littlefield Barbara G.

(Last) (First) (Middle)

C/O AMERICAN SUPERCONDUCTOR CORPORATION

114 EAST MAIN STREET

(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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	04/03/2026(1)		A		3,116	A	$0	35,427(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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

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 35,427 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)