Proposed sale of 148,266 ADTN common shares

Morgan Stanley Smith Barney LLC filed a Form 144 reporting a proposed sale of 148,266.55 shares of common stock of ADTN on 03/04/2026.

Rhea-AI Filing Summary

Morgan Stanley Smith Barney LLC filed a Form 144 reporting a proposed sale of 148,266.55 shares of common stock of ADTN on 03/04/2026. The shares are described as restricted stock vesting under a registered plan with a vesting/service date of 12/31/2025.

FAQ

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

What does ADTN's Form 144 filed by Morgan Stanley Smith Barney LLC report?

The filing reports a proposed sale of 148,266.55 common shares of ADTN, dated 03/04/2026. It identifies the shares as restricted stock vesting under a registered plan with a vesting date of 12/31/2025.

Who is the broker or dealer listed on the ADTN Form 144?

The broker/dealer shown is Morgan Stanley Smith Barney LLC, listed with an address at 1 New York Plaza, 8th Floor, New York, NY 10004. The record links the filing to Nasdaq-listed common stock.

Are the shares on ADTN Form 144 already sold or newly vested?

The filing lists the securities as restricted stock vesting under a registered plan with a service/vesting date of 12/31/2025. The document records a proposed sale notice dated 03/04/2026 rather than a completed sale.

Does the ADTN Form 144 show recent sales in the past three months?

The extracted excerpt includes a heading for past three-month sales but does not list amounts. The filing shows the proposed sale entry for 148,266.55 shares and no explicit completed-sales figures in the provided text.

What exchange is ADTN listed on in the Form 144 excerpt?

The excerpt identifies the trading venue as NASDAQ. The filing ties the proposed sale to ADTN common stock traded on that exchange with the filing date 03/04/2026.

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

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Accepted by SEC EDGAR 03/04/2026 - 04:27 PM Learn about SEC filing dates

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	0001637150
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	ADTRAN Holdings, Inc.
SEC File Number	001-41446
Address of Issuer	901 EXPLORER BLVD HUNTSVILLE ALABAMA 35806
Phone	256-963-8220
Name of Person for Whose Account the Securities are To Be Sold	JACQUELINE H RICE
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	Director

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	14406	148266.55	80659651	03/04/2026	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	12/31/2025	Restricted stock vesting under a registered plan	Issuer			14406	12/31/2025	Services Rendered

* 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

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	03/04/2026
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	/s/ Jacqueline Hourigan Rice
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)