INSMED Inc (INSM) Institutional Ownership

Institutions by Trading Activity

0Shares Outstanding

300,328Shares held by institutions

$46,058,302Value of institutional holdings

111.03%Institutional ownership %

4.52%Shares Changed QoQ

512No. of institutional investors

INSMED Inc (NASDAQ:INSM) is held by 659 institutional investors per 13F filings through December 2025.

They owned 98.7% of outstanding stock in December 2025, down from 112.6% the prior quarter.
Their total shares held in INSM decreased -6.55% quarter over quarter, and separately, investors owning Insmed increased 52.19% from a year ago.
Of these 659 funds, 426 grew their exposure to Insmed, 180 cut back, and 53 maintained positions.
Combined, these investors held 209.08Mn shares in INSM for December 2025, down by 14.66Mn shares quarter on quarter, and up 12.7Mn shares year over year.
Jpmorgan Chase & Co holds the largest position in INSM at 23.2Mn shares as of December 31, 2025, or 10.96% of shares outstanding.
The largest buyers of Insmed for the quarter ending December 2025 were NORGES BANK (2.91Mn), BlackRock, Inc. (2.7Mn), RTW INVESTMENTS, LP (1.76Mn), State Street Corp (1.22Mn), NOMURA ASSET MANAGEMENT INTERNATIONAL INC. (1.18Mn).
The biggest sellers of Insmed for the quarter ending December 2025 included Jpmorgan Chase & Co (22.9Mn), Capital International Investors (2.4Mn), NWI MANAGEMENT LP (2.07Mn), Bank Of America Corp /De/ (1.48Mn), D. E. Shaw & Co., Inc. (1.31Mn).
Insmed's 10 largest shareholders as of December 2025 include Jpmorgan Chase & Co (23.2Mn), VANGUARD GROUP INC (21.08Mn), Darwin Global Management, Ltd. (20.93Mn), BlackRock, Inc. (15.07Mn), FMR LLC (9.93Mn), BAKER BROS. ADVISORS LP (6.59Mn), State Street Corp (5.2Mn), Capital International Investors (5.15Mn), Artisan Partners Limited Partnership (4.84Mn), RTW INVESTMENTS, LP (4.84Mn) per Business Quant data.

300,328 Total Shares Held

Rows:

Owner Name	Date	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	2,700,148	21.84%	$0.00
Jpmorgan Chase & Co	31 Dec, 2025	-22,895,840	-49.67%	$0.00
Darwin Global Management, Ltd.	31 Dec, 2025	475,832	2.33%	$0.00
Rockefeller Capital Management L.P.	31 Dec, 2025	569,714	6,392.66%	$0.00
VANGUARD GROUP INC	31 Dec, 2025	1,140,524	5.72%	$0.00
Orbis Allan Gray Ltd	31 Dec, 2025	929,089	28.58%	$0.00
Barclays Plc	31 Dec, 2025	-1,553	-0.35%	$0.00
FMR LLC	31 Dec, 2025	746,973	8.14%	$0.00
UBS Group AG	31 Dec, 2025	221,396	13.45%	$0.00
HSBC HOLDINGS PLC	31 Dec, 2025	245,022	16,205.16%	$0.00
BAKER BROS. ADVISORS LP	31 Dec, 2025	-110,738	-1.65%	$0.00
Castle Hook Partners LP	31 Dec, 2025	162,163	14.86%	$0.00
PEAK6 LLC	31 Dec, 2025	44,380	0.00%	$0.00
State Street Corp	31 Dec, 2025	1,217,390	30.55%	$0.00
Integral Health Asset Management, LLC	31 Dec, 2025	-350,000	-21.88%	$0.00
Osbon Capital Management LLC	31 Dec, 2025	137	0.00%	$0.00
Capital International Investors	31 Dec, 2025	-2,402,182	-31.80%	$0.00
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC	31 Dec, 2025	-333,961	-21.48%	$0.00
Artisan Partners Limited Partnership	31 Dec, 2025	-93,934	-1.90%	$0.00
Pictet Asset Management Holding SA	31 Dec, 2025	-181,864	-15.94%	$0.00

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