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INSM

INSMED Inc
$109.14 -6.47 (-5.60%) At close · Jul 13
Market Cap
$23.66B
Shares
216,752,451

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 679
Total Value: $34,266,038,486
Total Shares: 209,716,197
Showing 1–100 of 710 holdings by value · page 1 of 8

Institutional Ownership Trend

26 quarters

Superinvestors Holding INSM

All superinvestors →
Stanley Druckenmiller $188,716,796 Ray Dalio $48,333,078 Joel Greenblatt $1,636,835

Holder Concentration

Across 674 13F filers
Top Holder
11.5%
Jun 2023 → Mar 2026 · range 8.6% – 11.5%
of institutional value
Top 5
38.4%
Jun 2023 → Mar 2026 · range 29.9% – 41.0%
of institutional value
Top 10
53.1%
Jun 2023 → Mar 2026 · range 40.1% – 53.3%
of institutional value
HHI
397
Jun 2023 → Mar 2026 · range 266 – 424
Broadly held
Showing 100 of 710
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mega JPMORGAN CHASE & CO $3,949,089,591 11.52% 24,150,499
Mid Darwin Global Management, Ltd. $2,747,983,687 8.02% 16,805,184
Mega BlackRock, Inc. $2,727,210,424 7.96% 16,678,146
Mega FMR LLC $2,151,950,504 6.28% 13,160,167
Mega VANGUARD CAPITAL MANAGEMENT LLC $1,576,681,261 4.60% 9,642,131
Large BAKER BROS. ADVISORS LP $1,213,500,070 3.54% 7,421,111
Large Artisan Partners Limited Partnership $1,067,344,259 3.11% 6,527,301
Mega D. E. Shaw & Co., Inc. $919,934,903 2.68% 5,625,825
Mega Capital International Investors $914,926,122 2.67% 5,595,194
Mega STATE STREET CORP $907,813,820 2.65% 5,551,699
Large RTW INVESTMENTS, LP $791,907,737 2.31% 4,842,880
Mega GEODE CAPITAL MANAGEMENT, LLC $727,727,608 2.12% 4,450,389
Mega PRICE T ROWE ASSOCIATES INC /MD/ $505,735,799 1.48% 3,092,807
Mega AMERIPRISE FINANCIAL INC $499,998,043 1.46% 3,057,718
Mega FRANKLIN RESOURCES INC $427,972,880 1.25% 2,617,251
Mega CITADEL ADVISORS LLC $356,894,009 1.04% 2,182,571
Mega Invesco Ltd. $325,236,040 0.95% 1,988,968
Large Orbis Allan Gray Ltd $306,244,179 0.89% 1,872,824
Mega UBS Group AG $284,112,890 0.83% 1,737,481
Mega BANK OF AMERICA CORP /DE/ Bank $245,652,986 0.72% 1,502,281
Mid Integral Health Asset Management, LLC $245,280,000 0.72% 1,500,000
Large WESTFIELD CAPITAL MANAGEMENT CO LP $240,122,415 0.70% 1,468,459
Large SEI INVESTMENTS CO $228,240,234 0.67% 1,395,794
Mega Capital World Investors $222,761,824 0.65% 1,362,291
Mega VANGUARD FIDUCIARY TRUST CO Bank $221,490,456 0.65% 1,354,516
Mega MORGAN STANLEY $217,733,740 0.64% 1,331,542
Mega NORTHERN TRUST CORP Bank $211,594,876 0.62% 1,294,000
Mid Castle Hook Partners LP $207,630,174 0.61% 1,269,754
Mega Bank of New York Mellon Corp Bank $206,484,708 0.60% 1,262,749
Mid Paradigm Biocapital Advisors LP $205,133,877 0.60% 1,254,488
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $198,680,883 0.58% 1,215,025
Mega MILLENNIUM MANAGEMENT LLC $189,321,166 0.55% 1,157,786
Mid Duquesne Family Office LLC Family Office $188,716,796 0.55% 1,154,090
Large NOMURA ASSET MANAGEMENT INTERNATIONAL INC. $187,024,201 0.55% 1,143,739
Large Pictet Asset Management Holding SA $180,239,592 0.53% 1,102,248
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $174,866,652 0.51% 1,069,390
Large Fiera Capital Corp $167,112,534 0.49% 1,021,970
Mid NWI MANAGEMENT LP $165,809,280 0.48% 1,014,000
Mega GOLDMAN SACHS GROUP INC $154,141,471 0.45% 942,646
Mega AMERICAN CENTURY COMPANIES INC $151,386,652 0.44% 925,799
Mega PRINCIPAL FINANCIAL GROUP INC $149,860,192 0.44% 916,464
Large WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC $147,603,944 0.43% 902,666
Large ADAGE CAPITAL PARTNERS GP, L.L.C. $147,168,000 0.43% 900,000
Mega FIL Ltd $135,549,413 0.40% 828,947
Mega Amundi $131,629,838 0.38% 804,977
Mega Legal & General Group Plc $128,703,157 0.38% 787,079
Mega RAYMOND JAMES FINANCIAL INC $126,752,197 0.37% 775,148
Mega ALLIANCEBERNSTEIN L.P. $112,621,783 0.33% 688,734
Mid Hood River Capital Management LLC $112,592,350 0.33% 688,554
Mega AQR CAPITAL MANAGEMENT LLC $110,455,303 0.32% 675,485
Mid SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC $106,851,326 0.31% 653,445
Mega Clearbridge Investments, LLC $105,214,491 0.31% 643,435
Small Artia Global Partners LP $102,806,986 0.30% 628,712
Mega Swiss National Bank Bank $102,349,130 0.30% 625,912
Large GW&K Investment Management, LLC $101,880,808 0.30% 623,048
Mega JENNISON ASSOCIATES LLC $98,879,562 0.29% 604,694
Mega BNP PARIBAS ARBITRAGE, SA $98,864,192 0.29% 604,600
Mega WELLS FARGO & COMPANY/MN $97,684,229 0.29% 597,384
Mid TimesSquare Capital Management, LLC $95,626,168 0.28% 584,798
Mega DEUTSCHE BANK AG\ Bank $91,975,745 0.27% 562,474
Mid EVENTIDE ASSET MANAGEMENT, LLC $89,332,611 0.26% 546,310
Large FEDERATED HERMES, INC. $88,015,784 0.26% 538,257
Mega Nuveen, LLC $87,442,318 0.26% 534,750
Mega ROYAL BANK OF CANADA Bank $85,537,473 0.25% 523,101
Mega Sumitomo Mitsui Trust Group, Inc. $81,969,632 0.24% 501,282
Large Ensign Peak Advisors, Inc $81,720,101 0.24% 499,756
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $80,991,456 0.24% 495,300
Mid Affinity Asset Advisors, LLC $78,489,600 0.23% 480,000
Mid FRONTIER CAPITAL MANAGEMENT CO LLC $76,782,614 0.22% 469,561
Large BNP PARIBAS ASSET MANAGEMENT Holding S.A. $76,486,969 0.22% 467,753
Mega JANUS HENDERSON GROUP PLC $68,564,589 0.20% 419,304
Mid SAMLYN CAPITAL, LLC $68,221,360 0.20% 417,205
Small Palo Alto Investors LP $67,904,786 0.20% 415,269
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $67,043,200 0.20% 410,000
Large Candriam S.C.A. $65,691,707 0.19% 401,735
Mega DIMENSIONAL FUND ADVISORS LP $65,555,165 0.19% 400,900
Mega WELLINGTON MANAGEMENT GROUP LLP $65,251,673 0.19% 399,044
Large LORD, ABBETT & CO. LLC $64,960,118 0.19% 397,261
Mega VICTORY CAPITAL MANAGEMENT INC $64,793,982 0.19% 396,245
Mega CITADEL ADVISORS LLC $62,088,544 0.18% 379,700
Large Polar Capital Holdings Plc $60,192,856 0.18% 368,107
Mid GATEWAY INVESTMENT ADVISERS LLC $59,684,800 0.17% 365,000
Mega VANGUARD ASSET MANAGEMENT, Ltd $58,879,464 0.17% 360,075
Mid Sofinnova Investments, Inc. $56,590,184 0.17% 346,075
Mega California Public Employees Retirement System Pension $56,350,954 0.16% 344,612
Mega JANE STREET GROUP, LLC $54,697,440 0.16% 334,500
Mid Rock Springs Capital Management LP $51,394,336 0.15% 314,300
Large MARSHALL WACE, LLP $51,110,628 0.15% 312,565
Mega National Pension Service Pension $50,998,781 0.15% 311,881
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $49,576,320 0.14% 303,182
Mid Nearwater Capital Markets, Ltd $49,056,000 0.14% 300,000
Mega ENVESTNET ASSET MANAGEMENT INC $49,043,736 0.14% 299,925
Large Bridgewater Associates, LP $48,333,078 0.14% 295,579
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $48,000,641 0.14% 293,546
Large ProShare Advisors LLC $46,299,216 0.14% 283,141
Large Allspring Global Investments Holdings, LLC $46,232,662 0.13% 282,734
Small Artia Global Partners LP $45,736,544 0.13% 279,700
Large Aberdeen Group plc $45,297,654 0.13% 277,016
Mega BARCLAYS PLC $45,087,531 0.13% 275,731
Mega RHUMBLINE ADVISERS $44,578,004 0.13% 272,615
Key facts CIK 1104506 CUSIP 457669307 13F (30d) 40 filings 37 filers Visit website Investor relations

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