Stock Ownership/CABA

CABALETTA BIO INC (CABA): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in CABA · Health Care. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
11
13F filers
Aggregate Value
$77.8M
Across holders
Last Price
$1.95
2026-10-08
Sector
Health Care
GICS
Quarterly fund activity4 increased7 reduced6 exited
Full exits: Point72 Asset Management, L.P., Hudson Bay Capital Management LP, BALYASNY ASSET MANAGEMENT LLC, Schonfeld Strategic Advisors LLC, Squarepoint Ops LLC, Brevan Howard Capital Management LP
Institutional Holders of CABA
↗
11 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
ADAGE CAPITAL PARTNERS GP, L.L.C.
CIK 0001165408
Hedge Fund9.17M$28.5M36.7%0.0%Added+$1.1MQ2 2026
Woodline Partners LP
CIK 0001784547
Hedge Fund4.20M$13.1M16.8%0.0%Added+$9.2MQ2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund3.52M$11.0M14.1%0.0%Added+$10.7MQ2 2026
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
Hedge Fund2.07M$6.4M8.3%0.0%Reduced$-11.9MQ2 2026
MARSHALL WACE, LLP
CIK 0001318757
Hedge Fund1.57M$4.9M6.3%0.0%Reduced+$3.6MQ2 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
Hedge Fund1.54M$4.8M6.1%0.0%Reduced$-1.6MQ2 2026
Qube Research & Technologies Ltd
CIK 0001729829
Hedge Fund1.43M$4.4M5.7%0.0%Reduced$-1.6MQ2 2026
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
Hedge Fund1.41M$4.4M5.6%0.0%Reduced$-3.4MQ2 2026
SHAW D E & CO INC
CIK 0001009207
Hedge Fund91K$282K0.4%0.0%Reduced$-235KQ2 2026
FRED ALGER MANAGEMENT, LLC
CIK 0000003520
Hedge Fund14K$44K0.1%0.0%Reduced$-28KQ2 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.Added
Hedge Fund
$28.5M· 36.7% of total· 0.0% port· 9.17M sh· +$1.1M QoQ· Q2 2026
Woodline Partners LPAdded
Hedge Fund
$13.1M· 16.8% of total· 0.0% port· 4.20M sh· +$9.2M QoQ· Q2 2026
CITADEL ADVISORS LLCAdded
Hedge Fund
$11.0M· 14.1% of total· 0.0% port· 3.52M sh· +$10.7M QoQ· Q2 2026
MILLENNIUM MANAGEMENT LLCReduced
Hedge Fund
$6.4M· 8.3% of total· 0.0% port· 2.07M sh· $-11.9M QoQ· Q2 2026
MARSHALL WACE, LLPReduced
Hedge Fund
$4.9M· 6.3% of total· 0.0% port· 1.57M sh· +$3.6M QoQ· Q2 2026
RENAISSANCE TECHNOLOGIES LLCReduced
Hedge Fund
$4.8M· 6.1% of total· 0.0% port· 1.54M sh· $-1.6M QoQ· Q2 2026
Qube Research & Technologies LtdReduced
Hedge Fund
$4.4M· 5.7% of total· 0.0% port· 1.43M sh· $-1.6M QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPReduced
Hedge Fund
$4.4M· 5.6% of total· 0.0% port· 1.41M sh· $-3.4M QoQ· Q2 2026
SHAW D E & CO INCReduced
Hedge Fund
$282K· 0.4% of total· 0.0% port· 91K sh· $-235K QoQ· Q2 2026
FRED ALGER MANAGEMENT, LLCReduced
Hedge Fund
$44K· 0.1% of total· 0.0% port· 14K sh· $-28K QoQ· Q2 2026
Rockefeller Capital Management L.P.Added
Hedge Fund
$21K· 0.0% of total· 0.0% port· 7K sh· +$15K QoQ· Q2 2026
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