Caribou Biosciences, Inc. (CRBU)

Distributing

Institutional distribution: ownership decreased -1.31% quarter-over-quarter.

Data as of Q1 2026

Institutional Ownership

38.52%

QoQ Change

-1.31%

Total Value

$68.1B

Shares Outstanding

99.2M

Crowding AnalysisCrowded

Holders131of 5,944

Avg: 68

Uncrowded89th percentileCrowded

Institutional Activity

Buy/Sell Ratio1.02x

68th percentile

55 buying54 selling

+28

New

-15

Closed

+953K

Net shares

Holding Period Distribution

estimate

Median: 3 QAvg: 3.2 QHolders: 131

Ownership Concentration

Top 5: 41.1%Top 10: 58.2%

PFIZER12.3%

VANGUARD CAPITAL MANAGEMENT9.9%

RENAISSANCE TECHNOLOGIES6.8%

Kynam Capital Management,6.5%

BlackRock,5.6%

Others (126)58.9%

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Conviction-Weighted Ownership

Median weight: 0.00%Avg weight: 0.38%Max: 3.50%High conviction (>1%): 1

PFIZER

VANGUARD CAPITAL MANAGEMENT

RENAISSANCE TECHNOLOGIES

Kynam Capital Management,

BlackRock,

TWO SIGMA INVESTMENTS,

BANK OF AMERICA

Aberdeen Group

MARSHALL WACE, LLP

MILLENNIUM MANAGEMENT

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Whale Moves Timeline (8 Quarters)

Biggest dollar-value position changes among top 10 holders

NEWVANGUARD CAPITAL MANAGEMENT$7M3.8M shr

NEWBANK OF AMERICA CORP /DE$2M1.3M shr

NEWMARSHALL WACE, LLP$2M1.2M shr

NEWMILLENNIUM MANAGEMENT$2M1.1M shr

BOUGHTRENAISSANCE TECHNOLOGIES$2M951K shr

NEWRENAISSANCE TECHNOLOGIES$3M1.6M shr

NEWSUSQUEHANNA INTERNATIONAL GROUP, LLP$2M1.1M shr

NEWTWO SIGMA INVESTMENTS$2M1.0M shr

BOUGHTBlackRock$1M682K shr

SOLDKynam Capital Management$898K564K shr

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Institutional Trends (8 Quarters)

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Institutional Holders

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