SCHEDULE: Vanguard Group Discloses 10.2% Stake in ADTRAN Holdings Inc.

The Vanguard Group has filed an amended Schedule 13G, reporting a beneficial ownership of 10.2% in ADTRAN Holdings Inc. as of June 30, 2025.

Summary

• The Vanguard Group, based in Pennsylvania, reported beneficial ownership of 8,166,157 shares of ADTRAN Holdings Inc. Common Stock.
• This aggregate amount represents 10.20% of the class of securities.
• Vanguard holds sole voting power over 0 shares, shared voting power over 138,591 shares.
• Vanguard holds sole dispositive power over 7,954,909 shares, and shared dispositive power over 211,248 shares.
• The filing is an Amendment No. 17 to a Schedule 13G, indicating a change in previously reported ownership.
• The securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of the issuer.

Sentiment

Score: 7

Explanation: The disclosure of a significant passive stake by a major institutional investor like Vanguard is generally a positive signal, indicating that a large, reputable fund manager sees value in the company, even if it's a passive investment.

Positives

• The disclosure of a significant 10.2% stake by a major institutional investor like The Vanguard Group can be viewed positively, signaling confidence in ADTRAN Holdings Inc.

Negatives

• NA

Risks

• NA

Future Outlook

NA

Management Comments

• The Vanguard Group certifies that the securities were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities.

Industry Context

This filing reflects a routine disclosure of a significant passive investment by a large asset manager in a publicly traded company within the telecommunications equipment and services industry, which is typical for diversified investment portfolios.

Stakeholder Impact

• Shareholders: The disclosure of a significant institutional stake provides transparency regarding the ownership structure and can influence investor sentiment.

Key Dates

Keywords

ADTRAN Holdings Inc, Vanguard Group, Schedule 13G, Beneficial Ownership, Common Stock, Institutional Investor, SEC Filing, Equity Stake