| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| STANTON THOMAS R | Chairman & CEO, Director | C/O ADTRAN HOLDINGS, INC., 901 EXPLORER BOULEVARD, HUNTSVILLE | /s/ Dan Ragsdale, by power of attorney | 22 Jan 2026 | 0001191219 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | ADTN | Common Stock | Tax liability | $94,682 | -10,247 | -1% | $9.24 | 971,849 | 20 Jan 2026 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Shares delivered to the Issuer for the payment of withholding taxes due upon the vesting of previously granted restricted stock units. |