13F Insight
DOSSIER · 13F Holders · Q1 2026Mega-capCrowded
INSM

INSMED INC

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

CUSIP 457669307·697 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 6.2%
vs prior quarter
13F value held
$23.2B
54.0% inst. owned
of float
Holders
697
-60 QoQ
filers reporting
Activity
+21 / −115
+916 added · −916 reduced
this quarter
Concentration
15.99%
JPMORGAN CHASE & CO #1
top holder share
AI Holders Summary · Q1 2026

697 institutions reported INSM in Q1 2026. JPMORGAN CHASE & CO leads at 16.0% of the visible book. -60 net institutions QoQ — distribution reading.

Top holders

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

#HolderValueShares% port.Quarter
01
JPMORGAN CHASE & CO
CIK 0000019617
$3.7B24.2M0.24%Q1 202602
BlackRock, Inc.
CIK 0002012383
$2.7B16.7M0.05%Q1 202603
Darwin Global Management, Ltd.
CIK 0001839209
$2.6B16.8M68.33%Q1 202604
FMR LLC
CIK 0000315066
$2.2B13.2M0.11%Q1 202605
Vanguard Portfolio Management
CIK 0002100121
$1.7B10.4M0.09%Q1 202606
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$1.6B9.6M0.04%Q1 202607
BAKER BROS. ADVISORS LP
CIK 0001263508
$1.1B6.6M6.72%Q4 202508
Artisan Partners Limited Partnership
CIK 0001466153
$1.1B6.5M1.71%Q1 202609
Capital International Investors
CIK 0001562230
$915M5.6M0.21%Q1 202610
STATE STREET CORP
CIK 0000093751
$908M5.6M0.03%Q1 202611
RTW INVESTMENTS, LP
CIK 0001493215
$792M4.8M7.88%Q1 202612
D. E. Shaw & Co., Inc.
CIK 0001009207
$760M4.4M0.42%Q4 202513
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$733M4.5M0.05%Q1 202614
AMERIPRISE FINANCIAL INC
CIK 0000820027
$500M3.1M0.12%Q1 202615
FRANKLIN RESOURCES INC
CIK 0000038777
$428M2.6M0.10%Q1 202616
Invesco Ltd.
CIK 0000914208
$325M2.0M0.05%Q1 202617
CITADEL ADVISORS LLC
CIK 0001423053
$315M1.8M0.05%Q4 202518
Orbis Allan Gray Ltd
CIK 0001663865
$306M1.9M1.29%Q1 202619
UBS Group AG
CIK 0001610520
$284M1.7M0.04%Q1 202620
BANK OF AMERICA CORP /DE/
CIK 0000070858
$246M1.5M0.02%Q1 2026
Page 1 of 35
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