AMSC (NASDAQ) director sells $4.31M in shares; 9,670 restricted shares listed

Rhea-AI Filing Summary

AMSC reported insider sales. Form 144 filings show Daniel McGahn sold 72,525 shares of Common stock on 06/02/2026 for $3,682,892.03 and 12,893 shares on 06/03/2026 for $630,265.28. The filing also lists 9,670 restricted shares listed to be sold on 06/05/2026.

Insights

Securities Compliance Counsel

Routine Rule 144 resale activity by an affiliate is disclosed.

These entries list open-market dispositions: 72,525 shares on 06/02/2026 and 12,893 shares on 06/03/2026

The filing also records 9,670 restricted shares available to be sold on 06/05/2026. Cash‑flow treatment and any holding‑period qualifiers are not shown in the excerpt.

Key Figures

Shares sold (06/02/2026): 72,525 shares Proceeds (06/02/2026): $3,682,892.03 Shares sold (06/03/2026): 12,893 shares +2 more

5 metrics

Shares sold (06/02/2026) 72,525 shares Sale on <date>06/02/2026</date>

Proceeds (06/02/2026) $3,682,892.03 Proceeds reported for 72,525 shares

Shares sold (06/03/2026) 12,893 shares Sale on <date>06/03/2026</date>

Proceeds (06/03/2026) $630,265.28 Proceeds reported for 12,893 shares

Restricted shares listed 9,670 shares Restricted stock listed to be sold on <date>06/05/2026</date>

Key Terms

Restricted Stock, Common, Form 144

3 terms

Restricted Stock financial

"Restricted Stock | ISSUER | 9670 | 06/05/2026"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

Common financial

"Common | 06/03/2026 | 12893 | 630265.28"

Form 144 regulatory

"144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

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Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	9670	403996.16	47694445	06/08/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	06/05/2026	Restricted Stock	ISSUER			9670	06/05/2026	Not Applicable

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
DANIEL MCGAHN 114 East Main Street Ayer MA 01432	Common	06/03/2026	12893	630265.28
DANIEL MCGAHN 114 East Main Street Ayer MA 01432	Common	06/02/2026	72525	3682892.03

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What sales does the AMSC Form 144 disclose?

The filing discloses Daniel McGahn sold 72,525 shares on 06/02/2026 for $3,682,892.03 and 12,893 shares on 06/03/2026 for $630,265.28. It also lists 9,670 restricted shares to be sold on 06/05/2026.

Who is the reporting person on the Form 144 for AMSC?

The sales are reported in filings listing Daniel McGahn at an address in Ayer, MA. The broker listed is Morgan Stanley Smith Barney LLC Executive Financial Services in New York.

Do the Form 144 entries show sale proceeds for AMSC transactions?

Yes. The excerpt shows proceeds of $3,682,892.03 for 72,525 shares and $630,265.28 for 12,893 shares in the two reported transactions.

Are the 9,670 restricted shares already sold?

The filing lists 9,670 restricted shares with a 06/05/2026 date under "Securities To Be Sold." The excerpt records intent to sell; it does not state settlement or cash-flow completion.

Does this Form 144 indicate Rule 10b5-1 or prearranged plans?

The provided excerpt does not mention Rule 10b5-1 trading plans or prearranged arrangements. No footnote about planned trading appears in the text supplied.