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CRBU

Caribou Biosciences, Inc.
$1.83 +0.01 (+0.55%) At close · Jul 6
Market Cap
$181.50M
Shares
99,180,575

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 137
Total Value: $72,730,486
Total Shares: 38,279,241
Showing 1–100 of 142 holdings by value · page 1 of 2

Institutional Ownership Trend

19 quarters

Holder Concentration

Across 137 13F filers · Δ vs Dec 31, 2025
Top Holder
12.3%
Jun 2023 → Mar 2026 · range 9.5% – 13.8%
−0.3 pts
Top 5
41.0%
Jun 2023 → Mar 2026 · range 38.4% – 44.7%
+0.1 pts
Top 10
58.1%
Jun 2023 → Mar 2026 · range 55.5% – 64.2%
+2.1 pts
HHI
488
Jun 2023 → Mar 2026 · range 451 – 556
Broadly held−12

Quarterly Activity

vs Dec 31, 2025
New
28
Increased
27
Decreased
39
Sold Out
15
Unchanged
43
Holder count: +13
Institutional value: +22.5%
Shares held: +2.6%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Large RENAISSANCE TECHNOLOGIES LLC +950,640 2,590,497
Large ACADIAN ASSET MANAGEMENT LLC +865,317 925,039
Mega TWO SIGMA INVESTMENTS, LP +739,855 1,759,934
Large MARSHALL WACE, LLP +324,563 1,205,668
Mega MILLENNIUM MANAGEMENT LLC +307,419 1,074,421

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Large JACOBS LEVY EQUITY MANAGEMENT, INC −465,358 358,941
Mega UBS Group AG −378,576 259,169
Mega DIMENSIONAL FUND ADVISORS LP −332,810 673,200
Mega CITADEL ADVISORS LLC −316,796 297,933
Mega JANE STREET GROUP, LLC −219,210 111,475

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 3,767,228 $7,157,733
Large MACKENZIE FINANCIAL CORP 942,786 $1,791,293
Mega VANGUARD FIDUCIARY TRUST CO 520,118 $988,224
Large HRT FINANCIAL LP 78,954 $150,012
Mid Brevan Howard Capital Management LP 65,062 $123,617

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega VANGUARD GROUP INC 4,304,198 $6,843,673
Large TWO SIGMA ADVISERS, LP 1,115,700 $1,773,963
Large DekaBank Deutsche Girozentrale 130,000 $206,700
Mid Siren, L.L.C. 105,347 $167,501
Large ExodusPoint Capital Management, LP 77,704 $123,549
Filter: New 28 Increased 27 Reduced 39 Sold out 15 Unchanged 43
Showing 100 of 142
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Small Pfizer Inc $8,911,818 12.25% 4,690,431
Mega VANGUARD CAPITAL MANAGEMENT LLC $7,157,733 9.84% 3,767,228
Large RENAISSANCE TECHNOLOGIES LLC $4,921,944 6.77% 2,590,497
Mid Kynam Capital Management, LP $4,756,273 6.54% 2,503,302
Mega BlackRock, Inc. $4,071,858 5.60% 2,143,085
Mega TWO SIGMA INVESTMENTS, LP $3,343,874 4.60% 1,759,934
Mega BANK OF AMERICA CORP /DE/ Bank $2,464,615 3.39% 1,297,167
Large Aberdeen Group plc $2,303,827 3.17% 1,212,541
Large MARSHALL WACE, LLP $2,290,768 3.15% 1,205,668
Mega MILLENNIUM MANAGEMENT LLC $2,041,399 2.81% 1,074,421
Mega GEODE CAPITAL MANAGEMENT, LLC $1,934,121 2.66% 1,017,959
Small PFM Health Sciences, LP $1,819,795 2.50% 957,787
Large MACKENZIE FINANCIAL CORP $1,791,293 2.46% 942,786
Large ACADIAN ASSET MANAGEMENT LLC $1,757,574 2.42% 925,039
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $1,590,115 2.19% 836,903
Mega FMR LLC $1,375,521 1.89% 723,959
Mega DIMENSIONAL FUND ADVISORS LP $1,279,078 1.76% 673,200
Mid MAVERICK CAPITAL LTD $1,239,829 1.70% 652,542
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $1,063,319 1.46% 559,642
Large Cambridge Investment Research Advisors, Inc. $1,039,326 1.43% 547,014
Mega VANGUARD FIDUCIARY TRUST CO Bank $988,224 1.36% 520,118
Mid GSA CAPITAL PARTNERS LLP $913,375 1.26% 480,724
Micro 72 Investment Holdings, LLC $900,727 1.24% 474,067
Mega STATE STREET CORP $804,199 1.11% 423,263
Mega GOLDMAN SACHS GROUP INC $715,518 0.98% 376,589
Small Green Alpha Advisors, LLC $709,935 0.98% 373,650
Large JACOBS LEVY EQUITY MANAGEMENT, INC $681,987 0.94% 358,941
Mid XTX Topco Ltd $614,591 0.85% 323,469
Mega WELLS FARGO & COMPANY/MN $576,943 0.79% 303,655
Mega UBS Group AG $492,420 0.68% 259,169
Small Bruce & Co., Inc. $475,000 0.65% 250,000
Mega MORGAN STANLEY $465,712 0.64% 245,112
Mega NORTHERN TRUST CORP Bank $413,696 0.57% 217,735
Large Point72 Asset Management, L.P. $356,481 0.49% 187,622
Large Qube Research & Technologies Ltd $335,724 0.46% 176,697
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $307,990 0.42% 162,100
Small MILESTONE ASSET MANAGEMENT, LLC $307,944 0.42% 162,076
Mega CITADEL ADVISORS LLC $302,161 0.42% 159,033
Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC $250,800 0.34% 132,000
Large OMERS ADMINISTRATION Corp $228,380 0.31% 120,200
Micro NANO CAP NEW MILLENNIUM GROWTH FUND L P $223,250 0.31% 117,500
Mega AMERICAN CENTURY COMPANIES INC $213,660 0.29% 112,453
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $168,125 0.23% 88,487
Mega JANE STREET GROUP, LLC $164,350 0.23% 86,500
Mega Invesco Ltd. $158,653 0.22% 83,502
Small Keystone Financial Group $152,902 0.21% 80,475
Large HRT FINANCIAL LP $150,012 0.21% 78,954
Large Man Group plc $146,699 0.20% 77,210
Mega CITADEL ADVISORS LLC $137,560 0.19% 72,400
Mega CITADEL ADVISORS LLC $126,350 0.17% 66,500
Mid Brevan Howard Capital Management LP $123,617 0.17% 65,062
Small Nelson Capital Management, LLC $111,501 0.15% 58,685
Mega CANADA PENSION PLAN INVESTMENT BOARD Pension $110,010 0.15% 57,900
Mega CITIGROUP INC $108,153 0.15% 56,923
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $91,580 0.13% 48,200
Large COMMONWEALTH EQUITY SERVICES, LLC $85,325 0.12% 44,908
Mid RBF Capital, LLC $76,000 0.10% 40,000
Mid Quadrature Capital Ltd $75,156 0.10% 39,556
Mid Vanguard Personalized Indexing Management, LLC $74,542 0.10% 39,233
Large PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO Pension $74,345 0.10% 39,129
Mid Graham Capital Management, L.P. $73,626 0.10% 38,751
Mid Virtu Financial LLC $69,557 0.10% 36,609
Mega LPL Financial LLC $67,020 0.09% 35,274
Mega HSBC HOLDINGS PLC $65,474 0.09% 34,460
Large US BANCORP \DE\ Bank $65,103 0.09% 34,265
Large Jefferies Financial Group Inc. $63,197 0.09% 33,262
Small Diametric Capital, LP $62,306 0.09% 32,793
Large &PARTNERS $61,759 0.08% 32,505
Mid Prime Capital Investment Advisors, LLC $61,398 0.08% 32,315
Small Catalyst Funds Management Pty Ltd $61,180 0.08% 32,200
Small Thrive Wealth Management, LLC $60,800 0.08% 32,000
Large SEI INVESTMENTS CO $58,915 0.08% 31,008
Large Connor, Clark & Lunn Investment Management Ltd. $58,407 0.08% 30,741
Mega ENVESTNET ASSET MANAGEMENT INC $58,113 0.08% 30,586
Mega AMERIPRISE FINANCIAL INC $55,917 0.08% 29,430
Mega Vanguard Global Advisers, LLC $55,291 0.08% 29,101
Large CREDIT AGRICOLE S A $55,100 0.08% 29,000
Large Russell Investments Group, Ltd. $52,363 0.07% 27,560
Mega BARCLAYS PLC $50,753 0.07% 26,713
Mega JANE STREET GROUP, LLC $47,450 0.07% 24,975
Large Schonfeld Strategic Advisors LLC $45,541 0.06% 23,969
Mega BANK OF MONTREAL /CAN/ Bank $39,900 0.05% 21,000
Mid NINE MASTS CAPITAL Ltd $39,162 0.05% 20,612
Small Next Capital Management LLC $38,000 0.05% 20,000
Small Westmount Partners, LLC $37,257 0.05% 19,609
Small LIBERTY WEALTH MANAGEMENT LLC $37,050 0.05% 19,500
Large PRUDENTIAL FINANCIAL INC $36,100 0.05% 19,000
Large HighTower Advisors, LLC $32,174 0.04% 16,934
Mid China Universal Asset Management Co., Ltd. $31,515 0.04% 16,587
Large Creative Planning $31,350 0.04% 16,500
Mega RAYMOND JAMES FINANCIAL INC $31,108 0.04% 16,373
Mega AQR CAPITAL MANAGEMENT LLC $29,787 0.04% 15,678
Small Bronte Capital Management Pty Ltd. $29,691 0.04% 15,627
Micro CTC Alternative Strategies, Ltd. $28,644 0.04% 15,076
Mid Modern Wealth Management, LLC $28,500 0.04% 15,000
Small AXQ CAPITAL, LP $28,500 0.04% 15,000
Large Cetera Investment Advisers $28,083 0.04% 14,781
Mid GREAT VALLEY ADVISOR GROUP, INC. $27,196 0.04% 14,314
Small TWO SIGMA SECURITIES, LLC Broker-Dealer $24,798 0.03% 13,052
Small Pinnacle Wealth Management Advisory Group, LLC $24,515 0.03% 12,903
Key facts CIK 1619856 CUSIP 142038108 13F (30d) 4 filings 2 filers Visit website Investor relations

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