Caribou Biosciences CRBU Institutional Ownership

Updated Oct 11, 2026

Caribou Biosciences, Inc. (NASDAQ:CRBU) was held by 138 institutional investors that filed 13F reports for the quarter ended June 30, 2026.

• These investors held 45.73% of Caribou Biosciences' outstanding shares at the end of Q2 2026, up from 39.02% in Q1 2026.
• Total shares held in Caribou Biosciences rose 28.13% from Q1 2026, while the number of holders rose 8.66% from Q2 2025.
• Of the 138 holders of CRBU in Q2 2026, 71 added to their positions, 24 reduced their stakes and 43 left their positions unchanged.
• Combined, institutional investors held 48.48Mn shares of CRBU as of Q2 2026, up 10.64Mn from the prior quarter and up 8.26Mn from a year earlier.
• BlackRock, Inc. led 13F holders of CRBU with 7.82Mn shares as of June 30, 2026, or 7.37% of shares outstanding.
• Holders that added the most shares of Caribou Biosciences in Q2 2026 were BlackRock, Inc. (+5.67Mn shares), Mackenzie Financial Corp (+2.71Mn shares), Geode Capital Management, LLC (+1.36Mn shares), State Street Corp (+1.21Mn shares) and Acadian Asset Management LLC (+849.43K shares).
• Among holders that kept a stake in Caribou Biosciences, the biggest sellers in Q2 2026 were Millennium Management LLC (-1.02Mn shares), Marshall Wace, LLP (-829.98K shares), Two Sigma Investments, LP (-713.65K shares), Susquehanna International Group, LLP (-671.49K shares) and PFM Health Sciences, LP (-603.1K shares).
• Business Quant data shows the 10 biggest positions in Caribou Biosciences as of Q2 2026 were held by BlackRock, Inc. (7.82Mn shares), Pfizer Inc (4.69Mn shares), Vanguard Capital Management LLC (4.21Mn shares), Mackenzie Financial Corp (3.65Mn shares), Renaissance Technologies LLC (2.77Mn shares), Kynam Capital Management, LP (2.5Mn shares), Geode Capital Management, LLC (2.37Mn shares), Acadian Asset Management LLC (1.77Mn shares), State Street Corp (1.63Mn shares) and Bank of America Corp (1.41Mn shares).