Form 4 Filing for ADTRAN Holdings, Inc. - Officer/Director Transaction

Anne Del Santo, a director at ADTRAN Holdings, Inc. (ADTN), was granted 4,399 restricted stock awards on July 1, 2026. This grant vests in full on the first anniversary of the grant date. The transaction code is "A" for acquisition, with a transaction price of $0.00. Following this transaction, Ms. Del Santo owns 4,399 shares of common stock directly. The filing was signed on July 6, 2026, by Dan Ragsdale under power of attorney.