CARIBOU BIOSCIENCES INC (CRBU) Top Institutional Shareholders
CARIBOU BIOSCIENCES INC (CRBU) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $67.35M in CRBU holdings during the latest filing period.
Pfizer Inc is currently the largest disclosed institutional shareholder of CRBU tracked by InsiderSet, reporting ownership valued at approximately $8.35M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $7.69M, representing an estimated loss of -7.87% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 62% of the total disclosed CRBU value among the investors covered in this analysis. Major shareholders include Pfizer Inc, Vanguard Capital Management Llc, Renaissance Technologies LLC, and several other long-term asset managers with concentrated positions in CARIBOU BIOSCIENCES INC (CRBU).
This page ranks the largest institutional CRBU shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
132
Total Reported Value
$67.35M
Largest Holder
Pfizer Inc
Largest Position
$8.35M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
149
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Pfizer Inc | 3.50% | 4,690,431 | $8,348,967 | $7,692,307 | -$656,660 | -7.87% | |
| Vanguard Capital Management Llc | 0.00% | 3,767,228 | $7,157,733 | $6,178,254 | -$979,479 | -13.68% | |
| Renaissance Technologies LLC | Jim Simons | 0.01% | 2,590,497 | $4,921,944 | $4,248,415 | -$673,529 | -13.68% |
| Kynam Capital Management, Lp | 0.30% | 2,503,302 | $4,756,274 | $4,105,415 | -$650,859 | -13.68% | |
| Blackrock, Inc. | 0.00% | 2,143,085 | $4,071,862 | $3,514,659 | -$557,203 | -13.68% | |
| Two Sigma Investments, Lp | 0.00% | 1,759,934 | $3,343,875 | $2,886,292 | -$457,583 | -13.68% | |
| Bank Of America Corp | 0.00% | 1,297,167 | $2,464,618 | $2,127,354 | -$337,264 | -13.68% | |
| Aberdeen Group Plc | 0.00% | 1,212,541 | $2,303,828 | $1,988,567 | -$315,261 | -13.68% | |
| Marshall Wace, Llp | 0.00% | 1,205,668 | $2,290,770 | $1,977,296 | -$313,474 | -13.68% | |
| Millennium Management Llc | 0.00% | 1,074,421 | $2,041,400 | $1,762,050 | -$279,350 | -13.68% | |
| Geode Capital Management, Llc | 0.00% | 1,017,959 | $1,934,941 | $1,669,453 | -$265,488 | -13.72% | |
| Pfm Health Sciences, Lp | 0.19% | 957,787 | $1,819,795 | $1,570,771 | -$249,024 | -13.68% | |
| Mackenzie Financial Corp | 0.00% | 942,786 | $1,791,293 | $1,546,169 | -$245,124 | -13.68% | |
| Susquehanna International Group, Llp | 0.00% | 836,903 | $1,590,116 | $1,372,521 | -$217,595 | -13.68% | |
| Fmr Llc | 0.00% | 723,959 | $1,375,522 | $1,187,293 | -$188,229 | -13.68% | |
| Dimensional Fund Advisors Lp | 0.00% | 673,200 | $1,278,102 | $1,104,048 | -$174,054 | -13.62% | |
| Maverick Capital Ltd | 0.01% | 652,542 | $1,239,830 | $1,070,169 | -$169,661 | -13.68% | |
| Charles Schwab Investment Management Inc | 0.00% | 559,642 | $1,063,320 | $917,813 | -$145,507 | -13.68% | |
| Vanguard Fiduciary Trust Co | 0.00% | 520,118 | $988,224 | $852,994 | -$135,230 | -13.68% | |
| 72 Investment Holdings, Llc | 1.82% | 474,067 | $900,727 | $777,470 | -$123,257 | -13.68% | |
| State Street Corp | 0.00% | 423,263 | $804,200 | $694,151 | -$110,049 | -13.68% | |
| Goldman Sachs Group Inc | 0.00% | 376,589 | $715,519 | $617,606 | -$97,913 | -13.68% | |
| Green Alpha Advisors, Llc | 0.70% | 373,650 | $709,935 | $612,786 | -$97,149 | -13.68% | |
| Jacobs Levy Equity Management, Inc | 0.00% | 358,941 | $681,988 | $588,663 | -$93,325 | -13.68% | |
| Xtx Topco Ltd | 0.01% | 323,469 | $614,591 | $530,489 | -$84,102 | -13.68% | |
| Wells Fargo & Company/Mn | 0.00% | 303,655 | $576,945 | $497,994 | -$78,951 | -13.68% | |
| Ubs Group Ag | 0.00% | 259,169 | $492,421 | $425,037 | -$67,384 | -13.68% | |
| Bruce & Co., Inc. | 0.14% | 250,000 | $475,000 | $410,000 | -$65,000 | -13.68% | |
| Morgan Stanley | 0.00% | 245,112 | $465,713 | $401,984 | -$63,729 | -13.68% | |
| Northern Trust Corp | 0.00% | 217,735 | $413,696 | $357,085 | -$56,611 | -13.68% | |
| Point72 Asset Management, L.P. | 0.00% | 187,622 | $356,482 | $307,700 | -$48,782 | -13.68% | |
| Qube Research & Technologies Ltd | 0.00% | 176,697 | $335,724 | $289,783 | -$45,941 | -13.68% | |
| Milestone Asset Management, Llc | 0.06% | 162,076 | $307,944 | $265,805 | -$42,139 | -13.68% | |
| Citadel Advisors Llc | 0.00% | 159,033 | $302,163 | $260,814 | -$41,349 | -13.68% | |
| Bridgeway Capital Management, Llc | 0.01% | 132,000 | $250,800 | $216,480 | -$34,320 | -13.68% | |
| Omers Administration Corp | 0.00% | 120,200 | $228,380 | $197,128 | -$31,252 | -13.68% | |
| Nano Cap New Millennium Growth Fund L P | 0.21% | 117,500 | $223,250 | $192,700 | -$30,550 | -13.68% | |
| American Century Companies Inc | 0.00% | 112,453 | $213,661 | $184,423 | -$29,238 | -13.68% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.00% | 88,487 | $168,125 | $145,119 | -$23,006 | -13.68% | |
| Invesco Ltd. | 0.00% | 83,502 | $158,654 | $136,943 | -$21,711 | -13.68% | |
| Keystone Financial Group | 0.01% | 80,475 | $152,903 | $131,979 | -$20,924 | -13.68% | |
| Man Group Plc | 0.00% | 77,210 | $146,699 | $126,624 | -$20,075 | -13.68% | |
| Brevan Howard Capital Management Lp | 0.00% | 65,062 | $123,618 | $106,702 | -$16,916 | -13.68% | |
| Nelson Capital Management, Llc | 0.01% | 58,685 | $111,502 | $96,243 | -$15,259 | -13.68% | |
| Canada Pension Plan Investment Board | 0.00% | 57,900 | $110,010 | $94,956 | -$15,054 | -13.68% | |
| Citigroup Inc | 0.00% | 56,923 | $108,154 | $93,354 | -$14,800 | -13.68% | |
| Commonwealth Equity Services, Llc | 0.00% | 44,908 | $85,330 | $73,649 | -$11,681 | -13.69% | |
| Rbf Capital, Llc | 0.00% | 40,000 | $76,000 | $65,600 | -$10,400 | -13.68% | |
| Quadrature Capital Ltd | 0.00% | 39,556 | $75,156 | $64,872 | -$10,284 | -13.68% | |
| Vanguard Personalized Indexing Management, Llc | 0.00% | 39,233 | $74,543 | $64,342 | -$10,201 | -13.68% |
Frequently asked questions about CRBU
Who owns the most CRBU stock?
The largest holders of CRBU are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for CARIBOU BIOSCIENCES INC (CRBU).
Is CRBU widely held by superinvestors?
Many widely followed stocks like CRBU appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly CRBU is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.