ADTRAN Holdings, Inc. (ADTN) Institutional Ownership

Ownership Summary

ADTRAN Holdings, Inc. (NASDAQ:ADTN) has 209 institutional investors with active 13F positions as of December 2025.

• These investors collectively held 87.7% of ADTRAN Holdings's outstanding shares in December 2025, up from 86.0% in September 2025.
• Their total shares held in ADTN increased 7.19% quarter over quarter, and separately, investors owning ADTRAN Holdings increased 29.01% from a year ago.
• Among the 209 funds, 93 bought more ADTRAN Holdings shares, 82 sold down, and 34 held their ground.
• The aggregate institutional position in ADTRAN Holdings amounted to 70.01Mn shares as of December 2025, up by 4.69Mn shares quarter on quarter, and up 7.46Mn shares year over year.
• BlackRock, Inc. leads ownership in ADTN with 7.84Mn shares as of December 31, 2025, equal to 9.82% of outstanding shares.
• Top purchasers of ADTN stock for the quarter ending December 2025 included VANGUARD PORTFOLIO MANAGEMENT LLC (4.77Mn), VANGUARD CAPITAL MANAGEMENT LLC (3.43Mn), First Eagle Investment Management, LLC (1.5Mn), Shannon River Fund Management LLC (1.22Mn), Boston Partners (1.18Mn).
• Leading sellers of ADTRAN Holdings shares for the quarter ending December 2025 were Divisar Capital Management LLC (1.22Mn), MILLENNIUM MANAGEMENT LLC (798.39K), Kovack Advisors, Inc. (771.1K), Assenagon Asset Management S.A. (671.1K), WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC (489.09K).
• According to Business Quant data, leading holders of ADTN for December 2025 are BlackRock, Inc. (7.84Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (4.77Mn), VANGUARD CAPITAL MANAGEMENT LLC (3.43Mn), ROYCE & ASSOCIATES LP (3.13Mn), DnB Asset Management AS (3.12Mn), First Eagle Investment Management, LLC (2.74Mn), State Street Corp (2.35Mn), WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC (1.99Mn), MILLENNIUM MANAGEMENT LLC (1.9Mn), Morgan Stanley (1.83Mn).