Timothy P. Santo - 01 Apr 2026 Form 4 Insider Report for ADTRAN Holdings, Inc. (ADTN)

Reporting relationship: SVP of Finance; CFO
Issuer ticker: ADTN
Reported as of: 01 Apr 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 03 Apr 2026, 15:15:17 UTC
Prior SEC filing: 23 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Dan Ragsdale, by power of attorney

Key filing fact

Timothy P. Santo filed Form 4 for ADTRAN Holdings, Inc. (ADTN) on 03 Apr 2026.

Key facts

This page summarizes Timothy P. Santo's Form 4 filing for ADTRAN Holdings, Inc. (ADTN).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 03 Apr 2026, 15:15.

Change

Previous filing in this sequence was filed on 23 Mar 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001974835 Primary reporting owner

Santo Timothy P

Relationship: SVP of Finance; CFO
Address: C/O ADTRAN HOLDINGS, INC., 901 EXPLORER BOULEVARD, HUNTSVILLE
Signature: /s/ Dan Ragsdale, by power of attorney
Signature date: 03 Apr 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ADTN transaction

Common Stock

Award

Transaction value
Shares: +28,252
Change %: +113%
Price: $0.000000^*
Shares after: 53,345
Date: 01 Apr 2026
Ownership: Direct
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

Represents a grant of restricted stock units that vest in four equal and annual installments beginning on the first anniversary date of the grant.

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