AMSC director awarded 3,116 common shares

Klein Margaret D. reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Klein Margaret D. reported acquisition or exercise transactions in this Form 4 filing.

AMERICAN SUPERCONDUCTOR CORP director Margaret D. Klein received a grant of 3,116 shares of common stock on April 3, 2026 at $0.00 per share. The award vested immediately and was made under the company’s Amended and Restated 2007 Director Stock Plan.

After this compensation grant, she holds 19,492 shares of common stock directly. This is not an open-market purchase or sale but a stock-based director compensation award.

Insider Trade Summary

Grant/Award: 3,116 shares

Grant/Award 1 txn

Insider Klein Margaret D.

Role Director

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

Holdings After Transaction: Common Stock — 19,492 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 19,492 shares directly.

Key Figures

Shares granted: 3,116 shares Grant price: $0.00 per share Shares held after grant: 19,492 shares

3 metrics

Shares granted 3,116 shares Immediately vested common stock award on April 3, 2026

Grant price $0.00 per share Director stock grant compensation, non-market transaction

Shares held after grant 19,492 shares Director’s direct holdings following all reported transactions

Key Terms

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

4 terms

Amended and Restated 2007 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"

immediately vested shares financial

"This award of immediately vested shares of American Superconductor Corporation common stock was made..."

grant, award, or other acquisition financial

"transaction code description indicates a Grant, award, or other acquisition"

Common Stock financial

"security_title is listed as Common Stock for the transaction"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

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

What insider transaction did AMSC director Margaret D. Klein report?

Margaret D. Klein reported receiving 3,116 shares of American Superconductor common stock as a grant. The shares were awarded at $0.00 per share and vested immediately under the company’s Amended and Restated 2007 Director Stock Plan as part of her director compensation.

How many AMSC shares does Margaret D. Klein hold after this Form 4?

Following the reported grant, Margaret D. Klein holds 19,492 shares of American Superconductor common stock directly. This total reflects all transactions reported in the Form 4 and represents her direct ownership position after receiving the immediately vested stock award.

Was Margaret D. Klein’s AMSC stock grant an open-market purchase?

No, the Form 4 shows the transaction as a grant or award, not an open-market purchase. The 3,116 shares were issued at $0.00 per share as immediately vested director compensation under American Superconductor’s Amended and Restated 2007 Director Stock Plan.

What plan governed the AMSC stock grant to director Margaret D. Klein?

The stock grant was made under American Superconductor’s Amended and Restated 2007 Director Stock Plan, as amended. This plan provides for equity-based compensation to directors, and in this case delivered 3,116 immediately vested common shares to Margaret D. Klein at no cash cost.

What does transaction code "A" mean in Margaret D. Klein’s AMSC Form 4?

Transaction code "A" on the Form 4 indicates a grant, award, or other acquisition of securities. For Margaret D. Klein, it reflects a compensation-related award of 3,116 immediately vested American Superconductor common shares, rather than a market purchase or sale.

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

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Accepted by SEC EDGAR 04/07/2026 - 05:38 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^*

Klein Margaret D.

(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	19,492(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 19,492 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)