13F Insight
DOSSIER · 13F Holders · Q1 2026Defensive growthQuality
QTTB

Q32 BIO INC

56 institutions still hold Q32 BIO INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 746964105·56 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 6.5%
vs prior quarter
13F value held
$51M
61.0% inst. owned
of float
Holders
56
+39 QoQ
filers reporting
Activity
+33 / −94
+801 added · −724 reduced
this quarter
Concentration
28.47%
ORBIMED ADVISORS LLC #1
top holder share
AI Holders Summary · Q1 2026

56 institutions reported QTTB in Q1 2026. ORBIMED ADVISORS LLC leads at 28.5% of the visible book. +39 net new institutions vs prior quarter — accumulation reading.

Top holders

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

#HolderValueShares% port.Quarter
01
ORBIMED ADVISORS LLC
CIK 0001055951
$14M2.3M0.29%Q1 202602
Atlas Venture Life Science Advisors, LLC
CIK 0001917529
$13M2.1M1.70%Q1 202603
Carlyle Group Inc.
CIK 0001527166
$7M1.1M0.07%Q1 202604
ARCH Venture Management, LLC
CIK 0001274403
$2M320K0.30%Q1 202605
ACORN CAPITAL ADVISORS, LLC
CIK 0002054410
$2M315K0.57%Q1 202606
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$2M306K0.00%Q1 202607
MACKENZIE FINANCIAL CORP
CIK 0000919859
$2M246K0.00%Q1 202608
Sanofi
CIK 0001121404
$2M244K0.47%Q1 202609
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
$1M207K0.00%Q1 202610
MONIMUS CAPITAL MANAGEMENT, LP
CIK 0001848831
$862,270134K0.24%Q1 202611
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$758,740118K0.00%Q1 202612
PFIZER INC
CIK 0000078003
$736,731102K0.31%Q1 202613
Opaleye Management Inc.
CIK 0001595855
$708,365213K0.09%Q4 202514
BlackRock, Inc.
CIK 0002012383
$553,06386K0.00%Q1 202615
JANE STREET GROUP, LLC
CIK 0001595888· Market maker
$421,14566K0.00%Q1 202616
VANGUARD FIDUCIARY TRUST CO
CIK 0000933478· Index
$320,96850K0.00%Q1 202617
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$271,86142K0.00%Q1 202618
STATE STREET CORP
CIK 0000093751
$266,52042K0.00%Q1 202619
ADAR1 Capital Management, LLC
CIK 0001940272
$224,70035K0.01%Q1 202620
Affinity Asset Advisors, LLC
CIK 0001773195
$178,32828K0.01%Q1 2026
Page 1 of 3
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