| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Santo Timothy P | SVP of Finance; CFO | C/O ADTRAN HOLDINGS, INC., 901 EXPLORER BOULEVARD, HUNTSVILLE | /s/ Dan Ragsdale, by power of attorney | 01 Dec 2025 | 0001974835 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | ADTN | Common Stock | Purchase | $49,323 | +6,150 | +30% | $8.02 | 26,594 | 28 Nov 2025 | Direct |