Vanguard Capital Management filed a Schedule 13G with the SEC on October 30, 2026, disclosing beneficial ownership of 4,184,669 shares of ADTRAN Holdings Inc common stock, representing 5.13% of the class, as of September 30, 2026.

Key Highlights

  • Aggregate beneficial ownership: Vanguard Capital Management reported beneficial ownership of 4,184,669 shares of ADTRAN Holdings common stock.
  • Percent of class: The reported holdings represent 5.13% of the outstanding class of common stock.
  • Sole dispositive power: Vanguard Capital Management holds sole power to dispose of all 4,184,669 shares.
  • Sole voting power: Sole voting power is reported for 602,902 shares, with 0 shares subject to shared voting power.
  • Triggering date: The event requiring this filing occurred on September 30, 2026.
  • Affiliated entities included: The filing covers securities held through Vanguard Asset Management Limited, Vanguard Fiduciary Trust Company, Vanguard Global Advisers, LLC, and Vanguard Investments Australia Ltd.

Vanguard Capital Management's Reported Position in ADTRAN Holdings

According to the Schedule 13G filed on October 30, 2026, Vanguard Capital Management, organized in Pennsylvania and headquartered at 100 Vanguard Blvd, Malvern, PA 19355, reported aggregate beneficial ownership of 4,184,669 shares of common stock of ADTRAN Holdings Inc (NASDAQ:ADTN), whose principal executive offices are located at 901 Explorer Blvd, Huntsville, AL 35806. The filing identifies Vanguard Capital Management as an investment adviser, with a type classification of "IA."

The filing discloses sole dispositive power over all 4,184,669 shares and sole voting power over 602,902 shares. Shared voting power and shared dispositive power are each reported as 0. According to the filing, the Schedule 13G reflects securities beneficially owned by Vanguard Capital Management LLC and certain affiliates and business divisions, including Vanguard Asset Management Limited, Vanguard Fiduciary Trust Company, Vanguard Global Advisers, LLC, and Vanguard Investments Australia Ltd., in accordance with SEC Release No. 34-39538 (January 12, 1998). The filing notes that it does not include securities, if any, beneficially owned by other subsidiaries or affiliates whose ownership is disaggregated from the reporting business unit under that release.

The filing states that Vanguard Capital Management, "including investment companies registered under the Investment Company Act of 1940 and other managed accounts, have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities reported herein," and that no single other person's interest exceeds 5%. The certifying signatory is My Trieu-Gatt, Authorized Signatory and Head of Global Fund Administration.

What Was Disclosed

Vanguard Capital Management filed a Schedule 13G disclosing a 5.13% beneficial ownership position, totaling 4,184,669 shares, in ADTRAN Holdings Inc common stock, based on holdings as of September 30, 2026, filed October 30, 2026.