Adtran Holdings, INC Schedule 13G passive stakes

Vanguard Portfolio Management has reported beneficial ownership of 6.03% of ADTRAN Holdings Inc. common stock as of March 31, 2026.

The Vanguard Group has reported a 0% beneficial ownership in ADTRAN Holdings Inc following an internal realignment.

EGORA Ventures AG has disclosed a 4.97% passive ownership stake in ADTRAN Holdings, Inc., holding over 4 million shares.

Divisar Capital Management LLC and Steven Baughman disclose a 4.0% beneficial ownership stake in ADTRAN Holdings, Inc. common stock.

Divisar Capital Management LLC and Steven Baughman have disclosed a 5.3% beneficial ownership stake in ADTRAN Holdings, Inc. common stock.

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.

Divisar Partners QP, L.P., Divisar Capital Management LLC, and Steven Baughman have filed an amended Schedule 13G, disclosing their passive beneficial ownership in ADTRAN Holdings, Inc. common stock.

William Blair Investment Management, LLC has filed an amended Schedule 13G, reporting a 4.2% beneficial ownership stake in ADTRAN Holdings, Inc. as of March 31, 2025.

DnB Asset Management AS has filed an amended Schedule 13G, reporting a 4.4% beneficial ownership stake in ADTRAN Holdings, Inc. as of March 31, 2025.

EGORA Ventures AG, a German entity, has disclosed a 6.7258% beneficial ownership stake in ADTRAN Holdings, Inc. common stock, affirming a passive investment intent.

Divisar Capital Management LLC, along with Divisar Partners QP, L.P. and Steven Baughman, has disclosed a collective beneficial ownership of 6.1% in ADTRAN Holdings, Inc. common stock as of December 31, 2024, through a Schedule 13G filing.