ADTRAN (ADTN) CEO receives 170,723 restricted stock units in grant

Rhea-AI Filing Summary

STANTON THOMAS R reported acquisition or exercise transactions in this Form 4 filing.

ADTRAN Holdings, Inc. Chairman & CEO Stanton R. Thomas reported a compensation-related equity award, not an open-market trade. He received 170,723 shares of Common Stock as a grant of restricted stock units. These units vest in four equal annual installments beginning on the first anniversary of the grant date. Following this award, Thomas directly holds 1,126,553.51 shares of ADTRAN common stock.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider STANTON THOMAS R

Role Chairman & CEO

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	170,723	$0.00	--

Holdings After Transaction: Common Stock — 1,126,553.51 shares (Direct)

Footnotes (1)

1. [object Object]

Key Figures

RSU grant size: 170,723 shares Post-transaction holdings: 1,126,553.51 shares Grant price per share: $0.0000 per share

3 metrics

RSU grant size 170,723 shares Restricted stock units granted to CEO Stanton R. Thomas

Post-transaction holdings 1,126,553.51 shares Total common shares directly owned after the grant

Grant price per share $0.0000 per share Stated price for the restricted stock unit award

Key Terms

restricted stock units, vest in four equal and annual installments, Grant, award, or other acquisition

3 terms

restricted stock units financial

"Represents a grant of restricted stock units that vest in four equal and annual installments"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

vest in four equal and annual installments financial

"restricted stock units that vest in four equal and annual installments beginning on the first anniversary"

Grant, award, or other acquisition financial

"transaction_code_description": "Grant, award, or other acquisition""

Form 4 Insider Transactions: What Each Field Means →

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^*

STANTON THOMAS R

(Last) (First) (Middle)

C/O ADTRAN HOLDINGS, INC.

901 EXPLORER BOULEVARD

(Street)

HUNTSVILLE ALABAMA 35806-2807

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ADTRAN Holdings, Inc. [ ADTN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chairman & CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/01/2026

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	04/01/2026		A(1)		170,723	A	$0	1,126,553.51	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. Represents a grant of restricted stock units that vest in four equal and annual installments beginning on the first anniversary date of the grant.

	/s/ Dan Ragsdale, by power of attorney	04/03/2026
	** 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)

FAQ

What insider transaction did ADTRAN (ADTN) report for its CEO?

ADTRAN reported that Chairman & CEO Stanton R. Thomas received a grant of 170,723 restricted stock units of common stock. This is a compensation-related equity award, not an open-market purchase or sale, and it increases his direct ownership stake in the company.

How many ADTRAN (ADTN) shares did the CEO receive in this Form 4 filing?

The CEO received 170,723 shares of ADTRAN common stock through a grant of restricted stock units. These units are awarded at no cash cost to him and represent additional equity compensation subject to a multi-year vesting schedule tied to continued service.

What is the vesting schedule for the ADTRAN CEO’s restricted stock units?

The restricted stock units granted to the ADTRAN CEO vest in four equal annual installments. Vesting begins on the first anniversary of the grant date, meaning the award will fully vest over a four-year period, assuming he continues in his role during that time.

Did the ADTRAN (ADTN) CEO buy or sell shares on the open market?

No open-market buy or sell occurred. The Form 4 shows a grant classified as a “Grant, award, or other acquisition” of 170,723 restricted stock units, awarded at a stated price of $0.0000 per share as part of his equity compensation package.

How many ADTRAN (ADTN) shares does the CEO own after this award?

After the grant of 170,723 restricted stock units, the CEO directly holds 1,126,553.51 shares of ADTRAN common stock. This figure reflects his total direct ownership position reported immediately following the transaction disclosed in the Form 4 filing.

Is the ADTRAN CEO’s Form 4 transaction a significant signal for investors?

The transaction reflects routine executive compensation, not a discretionary trade. It records a grant of 170,723 restricted stock units with four-year vesting, increasing his equity-based incentives. It does not involve buying or selling shares in the open market for cash.