Form 4 Filing for ADTRAN Holdings, Inc.

Wilson James Denson Jr., Chief Revenue Officer of ADTRAN Holdings, Inc., reported a series of transactions on May 20, 2026. Denson Jr. sold 9,332 shares of Common Stock at a weighted average price of $14.72 per share, with actual sale prices ranging from $14.69 to $14.765. Additionally, 10,469 shares were transferred to a donor-advised charitable fund at no cost. Following these transactions, Denson Jr. directly owns 132,808.486 shares. He also holds 4,246.251 shares indirectly through a 401(k) Plan. The reporting person has undertaken to provide detailed information on individual sale prices upon request.