An initial statement of beneficial ownership was filed on November 2, 2026, disclosing that Christian Terlinde became a director of ADTRAN Holdings, Inc. (NASDAQ:ADTN) effective October 27, 2026, with no securities of the company held at the time of appointment.

Key Highlights

  • New director appointed: Christian Terlinde joined the board of ADTRAN Holdings, Inc. as a director, with the appointment effective October 27, 2026.
  • Zero equity stake at appointment: According to the filing, no securities or derivative securities of the company were beneficially owned by Mr. Terlinde at the time of his appointment.
  • Direct ownership reported: The filing lists 0 shares of Common Stock held directly (ownership form: D) under Table I.
  • No derivative securities: Table II of the filing discloses no derivative securities, including no options, warrants, or convertible instruments, held by Mr. Terlinde.
  • Filing signed by proxy: The statement was signed by Dan Ragsdale under a power of attorney on November 2, 2026.

Terlinde's Appointment to the ADTRAN Holdings Board of Directors

ADTRAN Holdings, Inc., headquartered at 901 Explorer Boulevard in Huntsville, Alabama, is the issuer identified in this filing. The company trades on NASDAQ under the ticker ADTN. The filing reports the addition of Christian Terlinde to its board of directors, with the appointment becoming effective on October 27, 2026, according to the remarks section of the disclosure.

The filing states explicitly: "The appointment of Mr. Terlinde as Director of ADTRAN Holdings, Inc. (the 'Company') was effective on October 27, 2026. At such time, no securities or derivative securities of the Company were beneficially owned by Mr. Terlinde." This means that at the moment he assumed his directorship, Mr. Terlinde held neither common stock nor any derivative instruments such as options or warrants tied to the company's equity.

The disclosure was filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, which requires officers, directors, and principal shareholders of a reporting company to file an initial statement of beneficial ownership upon first becoming an insider. The filing was submitted by Dan Ragsdale acting under a power of attorney, as indicated by the signature block dated November 2, 2026.

What Was Disclosed

This filing discloses Christian Terlinde's initial beneficial ownership statement upon becoming a director of ADTRAN Holdings, Inc. on October 27, 2026. At the time of appointment, the filing confirms he held zero shares of common stock and no derivative securities of the company.