Adaptive Biotechnologies Corp (ADPT) Institutional Ownership

Ownership Summary

Adaptive Biotechnologies Corp (NASDAQ:ADPT) showed up in the 13F filings of 272 institutional investors as of December 2025.

• Their combined ownership stood at 87.9% of outstanding shares in December 2025, down from 90.5% in September 2025.
• They increased total shares held in Adaptive Biotechnologies by 4.73% from the prior quarter, while the number of investors in ADPT increased 32.68% year over year.
• Of these 272 holders, 144 added to their stakes in Adaptive Biotechnologies, 91 trimmed positions, and 37 made no changes.
• The aggregate institutional position in Adaptive Biotechnologies amounted to 143.43Mn shares as of December 2025, up by 6.47Mn shares quarter on quarter, and down 4.31Mn shares year over year.
• VIKING GLOBAL INVESTORS LP holds the largest position in ADPT at 29.99Mn shares as of December 31, 2025, or 18.38% of shares outstanding.
• Top purchasers of ADPT stock for the quarter ending December 2025 included VANGUARD CAPITAL MANAGEMENT LLC (6.09Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (4.49Mn), BNP Paribas Asset Management Holding S.A. (2.69Mn), WELLINGTON MANAGEMENT GROUP LLP (1.69Mn), PRICE T ROWE ASSOCIATES INC /MD/ (1.57Mn).
• The biggest sellers of Adaptive Biotechnologies for the quarter ending December 2025 included Goldman Sachs Group Inc (2.56Mn), PBU - The Pension Fund of Early Childhood & Youth Educators (2.54Mn), JENNISON ASSOCIATES LLC (1.92Mn), DIMENSIONAL FUND ADVISORS LP (1.19Mn), DRIEHAUS CAPITAL MANAGEMENT LLC (1.01Mn).
• Adaptive Biotechnologies's 10 largest shareholders as of December 2025 include VIKING GLOBAL INVESTORS LP (29.99Mn), BlackRock, Inc. (13.3Mn), VANGUARD CAPITAL MANAGEMENT LLC (6.09Mn), WESTFIELD CAPITAL MANAGEMENT CO LP (5.44Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (4.49Mn), Invesco Ltd. (4.45Mn), WELLINGTON MANAGEMENT GROUP LLP (3.86Mn), GEODE CAPITAL MANAGEMENT, LLC (3.64Mn), LORD, ABBETT & CO. LLC (3.54Mn), Goldman Sachs Group Inc (3.24Mn) per Business Quant data.