Was the ADTRAN (ADTN) CFO’s share purchase under a Rule 10b5-1 plan?

The filing’s Rule 10b5-1 checkbox is not marked , and the data do not reference any trading plan. This indicates the reported 6,579-share purchase was not affirmatively identified as being executed under a Rule 10b5-1 trading arrangement.

ADTRAN Holdings, Inc. (ADTN) CFO purchases 6,579 shares at $7.60

Q: Who at ADTRAN (ADTN) bought shares and what is their role?

Timothy P. Santo, ADTRAN’s SVP of Finance and Chief Financial Officer , bought the shares. The Form 4 shows this executive purchased 6,579 common shares, reflecting additional personal exposure to the company’s equity.

Q: At what price did the ADTRAN (ADTN) CFO buy the shares?

The ADTRAN CFO purchased 6,579 shares at $7.60 per share . The transaction is described as a purchase in an open-market or private transaction, with the reported price listed on a per-share basis in the filing.

Filing Impact

(Neutral)

Filing Sentiment

(Positive)

Form Type

Rhea-AI Filing Summary

ADTRAN Holdings, Inc. SVP of Finance and CFO Timothy P. Santo purchased 6,579 shares of common stock on August 6, 2026 at $7.60 per share in a purchase categorized as an open-market or private transaction. After this buy, he directly owns 59,924 shares. The filing’s Rule 10b5-1 trading-plan checkbox was not selected.

Insider Trade Summary

Net Buyer: 6,579 shares

Net Buy 1 txn

Insider Santo Timothy P

Role SVP of Finance; CFO

Bought 6,579 shs ($50K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	6,579	$7.60	$50K

Holdings After Transaction: Common Stock — 59,924 shares (Direct)

Key Figures

Shares purchased: 6,579 shares Purchase price per share: $7.60 Shares owned after transaction: 59,924 shares +2 more

5 metrics

Shares purchased 6,579 shares Common stock bought by CFO Timothy P. Santo on August 6, 2026

Purchase price per share $7.60 Price paid per share in the reported open-market or private purchase

Shares owned after transaction 59,924 shares CFO’s direct holdings of ADTRAN common stock following the purchase

Net buy shares 6,579 shares Net change in reported non-derivative holdings in this Form 4

Transactions classified as buys 1 Number of buy transactions reported in the transaction summary

Key Terms

Form 4, open-market or private transaction, Rule 10b5-1, direct ownership

4 terms

Form 4 regulatory

"per a Form 4 filing’s ownership table and transaction disclosure"

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.

open-market or private transaction financial

"transaction code description notes a purchase in an open-market or private transaction"

Rule 10b5-1 regulatory

"The filing’s Rule 10b5-1 trading-plan checkbox was not selected"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

direct ownership financial

"total_shares_following_transaction field reflects direct ownership by the reporting person"

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

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/07/2026 - 04:01 PM Accepted by SEC EDGAR 08/07/2026 - 04:00 PM

FAQ

What insider transaction did ADTRAN (ADTN) disclose in this Form 4?

ADTRAN (ADTN) disclosed that SVP of Finance and CFO Timothy P. Santo purchased 6,579 shares of common stock on August 6, 2026 at $7.60 per share, increasing his directly held stake to 59,924 shares.

Who at ADTRAN (ADTN) bought shares and what is their role?

Timothy P. Santo, ADTRAN’s SVP of Finance and Chief Financial Officer, bought the shares. The Form 4 shows this executive purchased 6,579 common shares, reflecting additional personal exposure to the company’s equity.

How many ADTRAN (ADTN) shares does the CFO own after the reported trade?

Following the reported purchase, CFO Timothy P. Santo directly owns 59,924 shares of ADTRAN common stock. This figure represents his post-transaction holdings as disclosed in the Form 4 filing’s ownership table.

At what price did the ADTRAN (ADTN) CFO buy the shares?

The ADTRAN CFO purchased 6,579 shares at $7.60 per share. The transaction is described as a purchase in an open-market or private transaction, with the reported price listed on a per-share basis in the filing.

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^*

Santo Timothy P

(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)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	SVP of Finance; CFO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/06/2026

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	08/06/2026		P		6,579	A	$7.6	59,924	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:

	Timothy P. Santo	08/07/2026
	** 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)

Source: View Original Filing on SEC EDGAR