13F Insight
DOSSIER · 13F Holders · Q1 2026High-convictionMulti-bagger
CABA

Cabaletta Bio Inc

114 institutions still hold Cabaletta Bio Inc as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 12674w109·114 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 7.7%
vs prior quarter
13F value held
$162M
70.0% inst. owned
of float
Holders
114
-37 QoQ
filers reporting
Activity
+79 / −24
+988 added · −753 reduced
this quarter
Concentration
16.07%
Bain Capital Life Sciences Investors, LLC #1
top holder share
AI Holders Summary · Q1 2026

114 institutions reported CABA in Q1 2026. Bain Capital Life Sciences Investors, LLC leads at 16.1% of the visible book. -37 net institutions QoQ — distribution reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
Bain Capital Life Sciences Investors, LLC
CIK 0001703031
$26M9.7M2.35%Q1 202602
ADAGE CAPITAL PARTNERS GP, L.L.C.
CIK 0001165408
$24M8.8M0.04%Q1 202603
JENNISON ASSOCIATES LLC
CIK 0000053417
$20M8.9M0.01%Q4 202504
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$16M5.9M0.01%Q1 202605
Cormorant Asset Management, LP
CIK 0001583977
$15M5.5M0.74%Q1 202606
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$11M4.0M0.00%Q1 202607
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$7M2.5M0.01%Q1 202608
BlackRock, Inc.
CIK 0002012383
$6M2.4M0.00%Q1 202609
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
$5M2.0M0.01%Q1 202610
Qube Research & Technologies Ltd
CIK 0001729829
$5M1.9M0.01%Q1 202611
MORGAN STANLEY
CIK 0000895421
$4M1.4M0.00%Q1 202612
Woodline Partners LP
CIK 0001784547
$3M1.3M0.01%Q1 202613
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$3M1.1M0.00%Q1 202614
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$3M1.1M0.00%Q1 202615
SUPERSTRING CAPITAL MANAGEMENT LP
CIK 0001931118
$3M1.1M2.05%Q1 202616
GOLDMAN SACHS GROUP INC
CIK 0000886982
$3M1.0M0.00%Q1 202617
Ikarian Capital, LLC
CIK 0001778253
$2M900K0.20%Q1 202618
MARSHALL WACE, LLP
CIK 0001318757
$2M959K0.00%Q4 202519
CANTOR FITZGERALD, L. P.
CIK 0001024896
$2M765K0.03%Q1 202620
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$2M741K0.00%Q1 2026
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