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Caribou Biosciences, Inc. (CRBU) institutional ownership

Latest close $1.49 Jul 28, 2026
Market cap$181M 52-week range SectorHealthcare
Funds holding · Q1 2026
103
reported CRBU position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Activity unavailable N/A
52 buyers · 51 sellers

Caribou Biosciences, Inc. (CRBU) price and institutional activity

Dates

Q1 2026

$0 bought by 52 investors
Renaissance Technologies LLCMackenzie Financial Corp +50 more
$0 sold by 51 investors
Two Sigma Advisers, LPJacobs Levy Equity Management, Inc +49 more
Bought Sold Totals per quarter; hover a bar for the names.

Caribou Biosciences, Inc. (CRBU) institutional activity · 103

Investor Type Est. change Change Δ Own Date
Two Sigma Advisers, LP · Exited
Change −1.1M Δ Own −100.0% Date Q1 2026
Two Sigma Advisers, LP Exited· Q1 2026 −1.1M −100.0% Q1 2026
Renaissance Technologies LLC Added· Q1 2026 +951K +58.0% Q1 2026
Mackenzie Financial Corp · New
Change +943K Date Q1 2026
Mackenzie Financial Corp New· Q1 2026 +943K Q1 2026
Acadian Asset Management LLC · Added
Change +865K Date Q1 2026
Acadian Asset Management LLC Added· Q1 2026 +865K Q1 2026
Two Sigma Investments, LP · Added
Change +740K Δ Own +72.5% Date Q1 2026
Two Sigma Investments, LP Added· Q1 2026 +740K +72.5% Q1 2026
Jacobs Levy Equity Management, Inc · Reduced
Change −465K Date Q1 2026
Jacobs Levy Equity Management, Inc Reduced· Q1 2026 −465K Q1 2026
UBS Group AG · Reduced
Change −379K Date Q1 2026
UBS Group AG Reduced· Q1 2026 −379K Q1 2026
Citadel Advisors LLC Reduced· Q1 2026 −356K −69.1% Q1 2026
Dimensional · Reduced
Change −333K Date Q1 2026
Dimensional Reduced· Q1 2026 −333K Q1 2026
Marshall Wace, LLP · Added
Change +325K Date Q1 2026
Marshall Wace, LLP Added· Q1 2026 +325K Q1 2026
Millennium Management LLC · Added
Change +307K Date Q1 2026
Millennium Management LLC Added· Q1 2026 +307K Q1 2026
Bank of America Corp · Added
Change +304K Date Q1 2026
Bank of America Corp Added· Q1 2026 +304K Q1 2026
Jane Street Group, LLC · Reduced
Change −271K Date Q1 2026
Jane Street Group, LLC Reduced· Q1 2026 −271K Q1 2026
Point72 Asset Management, L.P. · Reduced
Change −216K Δ Own −53.6% Date Q1 2026
Point72 Asset Management, L.P. Reduced· Q1 2026 −216K −53.6% Q1 2026
Susquehanna International Group, LLP · Reduced
Change −194K Date Q1 2026
Susquehanna International Group, LLP Reduced· Q1 2026 −194K Q1 2026
Data through Q1 2026 · filed Jun 3, 2026
15 of 103

Famous investor activity in Caribou Biosciences, Inc. (CRBU)

Caribou Biosciences, Inc. (CRBU) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Kelly Timothy P. · Officer Sell −$12K
Price $1.93 Qty −6K Owned 73K Trade date Feb 25, 2026 Filed date Feb 27, 2026
Kelly Timothy P. Officer Sell $1.93 −6K −$12K 73K Feb 25, 2026 Feb 27, 2026
Kelly Timothy P. · Officer Sell −$6K
Price $1.96 Qty −3K Owned 79K Trade date Feb 24, 2026 Filed date Feb 24, 2026
Kelly Timothy P. Officer Sell $1.96 −3K −$6K 79K Feb 24, 2026 Feb 24, 2026
McClung Barbara G. · Officer Sell −$14K
Price $1.96 Qty −7K Owned 482K Trade date Feb 24, 2026 Filed date Feb 24, 2026
McClung Barbara G. Officer Sell $1.96 −7K −$14K 482K Feb 24, 2026 Feb 24, 2026
Khan Ruhi Ahmad · Officer Sell −$14K
Price $1.96 Qty −7K Owned 105K Trade date Feb 24, 2026 Filed date Feb 24, 2026
Khan Ruhi Ahmad Officer Sell $1.96 −7K −$14K 105K Feb 24, 2026 Feb 24, 2026
Albertson Tina M. · Officer Sell −$2K
Price $1.96 Qty −1K Owned 69K Trade date Feb 24, 2026 Filed date Feb 24, 2026
Albertson Tina M. Officer Sell $1.96 −1K −$2K 69K Feb 24, 2026 Feb 24, 2026
Kelly Timothy P. · Officer 2 operations 248K
Owned 202K Trade date Feb 20, 2026 Filed date Feb 24, 2026
Kelly Timothy P. Officer 2 operations 248K 202K Feb 20, 2026 Feb 24, 2026
McClung Barbara G. · Officer 2 operations 248K
Owned 202K Trade date Feb 20, 2026 Filed date Feb 24, 2026
McClung Barbara G. Officer 2 operations 248K 202K Feb 20, 2026 Feb 24, 2026
Khan Ruhi Ahmad · Officer 2 operations 248K
Owned 202K Trade date Feb 20, 2026 Filed date Feb 24, 2026
Khan Ruhi Ahmad Officer 2 operations 248K 202K Feb 20, 2026 Feb 24, 2026
Albertson Tina M. · Officer 2 operations 302K
Owned 248K Trade date Feb 20, 2026 Filed date Feb 24, 2026
Albertson Tina M. Officer 2 operations 302K 248K Feb 20, 2026 Feb 24, 2026
Zheng Ran · Director Grant (A) 45K
Owned 45K Trade date Feb 20, 2026 Filed date Feb 20, 2026
Zheng Ran Director Grant (A) 45K 45K Feb 20, 2026 Feb 20, 2026
Whiting Nancy · Director Grant (A) 45K
Owned 45K Trade date Feb 20, 2026 Filed date Feb 20, 2026
Whiting Nancy Director Grant (A) 45K 45K Feb 20, 2026 Feb 20, 2026
Sacks Natalie · Director Grant (A) 45K
Owned 45K Trade date Feb 20, 2026 Filed date Feb 20, 2026
Sacks Natalie Director Grant (A) 45K 45K Feb 20, 2026 Feb 20, 2026
Richardson-Heron Dara · Director Grant (A) 45K
Owned 45K Trade date Feb 20, 2026 Filed date Feb 20, 2026
Richardson-Heron Dara Director Grant (A) 45K 45K Feb 20, 2026 Feb 20, 2026
Johnson David Lee · Director Grant (A) 45K
Owned 45K Trade date Feb 20, 2026 Filed date Feb 20, 2026
Johnson David Lee Director Grant (A) 45K 45K Feb 20, 2026 Feb 20, 2026
Guggenhime Andrew · Director Grant (A) 45K
Owned 45K Trade date Feb 20, 2026 Filed date Feb 20, 2026
Guggenhime Andrew Director Grant (A) 45K 45K Feb 20, 2026 Feb 20, 2026
15 of 18
15 of 18 Sign in to continue to older insider transactions.

Caribou Biosciences, Inc. (CRBU) activist and large shareholders

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
BlackRock Inc. 7.1M
% of shares outstanding 8.0% Filing date Jan 25, 2024
BlackRock Inc. 7.1M 8.0% Jan 25, 2024
Pfm Health Sciences, LP 6.5M
% of shares outstanding 7.3% Filing date Feb 14, 2024
Pfm Health Sciences, LP 6.5M 7.3% Feb 14, 2024
Blackrock, Inc. 7.2M
% of shares outstanding 7.2% Filing date Jul 27, 2026
Blackrock, Inc. 7.2M 7.2% Jul 27, 2026
Avidity Partners Management LP 6.4M
% of shares outstanding 7.2% Filing date Jan 8, 2024
Avidity Partners Management LP 6.4M 7.2% Jan 8, 2024
Pfizer Inc 4.7M
% of shares outstanding 7.1% Filing date Jul 10, 2023
Pfizer Inc 4.7M 7.1% Jul 10, 2023
FMR LLC 3.3M
% of shares outstanding 5.9% Filing date Jul 29, 2021
FMR LLC 3.3M 5.9% Jul 29, 2021
Bank of America Corp 5.0M
% of shares outstanding 5.6% Filing date Nov 14, 2024
Bank of America Corp 5.0M 5.6% Nov 14, 2024
Haurwitz Rachel E. 3.3M
% of shares outstanding 5.5% Filing date Feb 4, 2022
Haurwitz Rachel E. 3.3M 5.5% Feb 4, 2022
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Caribou Biosciences, Inc. (CRBU) ownership FAQ

Who owns CRBU?

103 reporting institutions disclosed CRBU position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.