AMERICAN SUPERCONDUCTOR (NASDAQ: AMSC) director reports 4,000-share stock sale

Filing Impact

(Moderate)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

AMERICAN SUPERCONDUCTOR CORP /DE/ director Laura A. Dambier sold shares of company stock in an open-market transaction. On the reported date, she sold 4,000 shares of Common Stock at a price of $37.63 per share. According to the footnotes, these sales were made for tax planning purposes.

Following the transaction, the reporting person holds 14,992 shares of Common Stock directly. The filing describes this as a sale in an open market or private transaction and does not show any associated derivative exercises or gifts in this report.

Insider Trade Summary

Net Seller: 4,000 shares ($150,520)

Net Sell 1 txn

Insider Dambier Laura A.

Role null

Sold 4,000 shs ($151K)

Type	Security	Shares	Price	Value
Sale	Common Stock	4,000	$37.63	$151K

Holdings After Transaction: Common Stock — 14,992 shares (Direct, null)

Footnotes (1)

The sales reported on this Form 4 were made by the reporting person for tax planning purposes. Following all the transactions reported on this Form 4, the reporting person holds 14,992 shares directly.

Key Figures

Shares sold: 4,000 shares Sale price per share: $37.63 per share Shares held after transaction: 14,992 shares

3 metrics

Shares sold 4,000 shares Common Stock open-market sale

Sale price per share $37.63 per share Open-market transaction

Shares held after transaction 14,992 shares Direct ownership following all reported transactions

Key Terms

Common Stock, open-market sale, Form 4, reporting person, +1 more

5 terms

Common Stock financial

"security_title: "Common Stock""

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.

open-market sale financial

"transaction_action: "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Form 4 regulatory

"The sales reported on this Form 4 were made by the reporting person"

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.

reporting person regulatory

"The sales reported on this Form 4 were made by the reporting person"

tax planning purposes financial

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

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Form 4 Insider Transactions: What Each Field Means →

06/12/2026 - 04:11 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^*

Dambier Laura A.

(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)
06/11/2026

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	06/11/2026		S⁽¹⁾		4,000	D	$37.63	14,992⁽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. The sales reported on this Form 4 were made by the reporting person for tax planning purposes.

2. Following all the transactions reported on this Form 4, the reporting person holds 14,992 shares directly.

	/s/ John R. Samia, Attorney-in-Fact	06/12/2026
	** 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 Laura A. Dambier report for AMSC?

Laura A. Dambier reported selling 4,000 shares of AMERICAN SUPERCONDUCTOR CORP Common Stock in an open-market transaction at $37.63 per share. The filing notes these sales were made by the reporting person for tax planning purposes.

At what price did the AMSC director sell her shares?

The director sold her AMERICAN SUPERCONDUCTOR CORP Common Stock at $37.63 per share. The Form 4 identifies the transaction as an open-market or private sale and indicates it was undertaken for personal tax planning purposes.

How many AMSC shares does the reporting person hold after the sale?

Following the reported transaction, the reporting person holds 14,992 shares of AMERICAN SUPERCONDUCTOR CORP Common Stock directly. A footnote in the Form 4 explicitly states this post-transaction ownership level after all transactions reported in the filing.

What is the transaction code used in this AMSC Form 4 filing?

The transaction uses code "S," which reflects a sale in an open market or private transaction. The filing also classifies the event as an open-market sale of Common Stock rather than an option exercise, gift, or tax-withholding disposition.

Does the AMSC Form 4 mention the reason for the director’s stock sale?

Yes. A footnote explains that the sales reported on this Form 4 were made by the reporting person for tax planning purposes. This provides additional context beyond the basic share count and price information in the transaction table.