Insmed INSM Institutional Ownership

NASDAQ INSM

$114.14 -1.49 (-1.29%)

At close: Sep 30, 2026 · 4:00 PM EDT

Institutions by Trading Activity

669 Institutions

Increased 368 55.0%

Unchanged 72 10.8%

Reduced 229 34.2%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

103.39%

▲+3.08 pp QoQ

Shares Held by Institutions

224.72Mn

of 217.35Mn outstanding

▲+6.39% QoQ

Shares Outstanding

217.35Mn

-7.37Mn held outside 13F filers

Institutional Investors

669

filed 13F for Jun 2026

▼-2 vs prior quarter

Net Shares Added (QoQ)

+13.50Mn

accumulated since last quarter

Value of Holdings

$25.65Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

INSMED Inc (NASDAQ:INSM) has 669 institutional investors that have filed 13F reports for the period ending June 2026.

Their combined ownership stood at 103.4% of outstanding shares in June 2026, up from 100.3% in March 2026.
They increased total shares held in Insmed by 6.39% from the prior quarter, while the number of investors in INSM increased 30.16% year over year.
Of these 669 holders, 368 added to their stakes in Insmed, 229 trimmed positions, and 72 made no changes.
Institutional investors collectively held 224.72Mn shares in Insmed as of June 2026, up by 13.5Mn shares quarter on quarter, and up 16.91Mn shares year over year.
FMR LLC holds the largest position in INSM at 16.14Mn shares as of June 30, 2026, or 7.43% of shares outstanding.
Leading buyers of Insmed shares for the quarter ending June 2026 were Orbis Allan Gray Ltd (4.2Mn), NORGES BANK (3.38Mn), Ameriprise Financial Inc (3.12Mn), FMR LLC (2.98Mn), Capital International Investors (2.64Mn).
Top sellers of INSM stock for the quarter ending June 2026 included Jpmorgan Chase & Co (13.72Mn), Darwin Global Management, Ltd. (10.37Mn), Invesco Ltd. (1.62Mn), Artisan Partners Limited Partnership (1.09Mn), NOMURA ASSET MANAGEMENT INTERNATIONAL INC. (924.62K).
Insmed's 10 largest shareholders as of June 2026 include FMR LLC (16.14Mn), BlackRock, Inc. (15.81Mn), Jpmorgan Chase & Co (10.43Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (10.41Mn), VANGUARD CAPITAL MANAGEMENT LLC (9.79Mn), BAKER BROS. ADVISORS LP (8.8Mn), Capital International Investors (8.24Mn), Darwin Global Management, Ltd. (6.43Mn), Ameriprise Financial Inc (6.18Mn), Orbis Allan Gray Ltd (6.08Mn) per Business Quant data.

Form 13F Holdings

669 Institutional Holders

Report period 30 Jun, 2026

Total shares held 224.72Mn

Of outstanding 103.39%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	FMR LLC	0000315066	16,143,583	7.43%	▲2,983,416	+22.67%	$1.72Bn
2	BlackRock, Inc.	0002012383	15,807,984	7.27%	▼870,162	-5.22%	$1.69Bn
3	Jpmorgan Chase & Co	0000019617	10,428,170	4.80%	▼13,722,329	-56.82%	$1.09Bn
4	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	10,407,962	4.79%	▲36,160	+0.35%	$1.11Bn
5	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	9,790,865	4.50%	▲148,734	+1.54%	$1.04Bn
6	BAKER BROS. ADVISORS LP	0001263508	8,796,111	4.05%	▲1,375,000	+18.53%	$937.84Mn
7	Capital International Investors	0001562230	8,238,124	3.79%	▲2,642,930	+47.24%	$878.34Mn
8	Darwin Global Management, Ltd.	0001839209	6,431,163	2.96%	▼10,374,021	-61.73%	$673.60Mn
9	Ameriprise Financial Inc	0000820027	6,179,571	2.84%	▲3,121,853	+102.10%	$658.88Mn
10	Orbis Allan Gray Ltd	0001663865	6,076,487	2.80%	▲4,203,663	+224.46%	$647.88Mn
11	State Street Corp	0000093751	6,052,174	2.78%	▲500,475	+9.01%	$645.28Mn
12	D. E. Shaw & Co., Inc.	0001009207	5,877,959	2.70%	▲252,134	+4.48%	$626.71Mn
13	Artisan Partners Limited Partnership	0001466153	5,441,718	2.50%	▼1,085,583	-16.63%	$580.20Mn
14	RTW INVESTMENTS, LP	0001493215	4,842,880	2.23%	0	0.00%	$516.35Mn
15	GEODE CAPITAL MANAGEMENT, LLC	0001214717	4,220,155	1.94%	▼230,234	-5.17%	$448.76Mn
16	PRICE T ROWE ASSOCIATES INC /MD/	0000080255	3,405,290	1.57%	▲312,483	+10.10%	$363.07K
17	NORGES BANK	0001374170	3,377,641	1.55%	▲3,377,641	0.00%	$360.12Mn
18	Jupiter Topco LLC	0002146052	2,605,181	1.20%	▲2,605,181	0.00%	$277.78Mn
19	UBS Group AG	0001610520	2,584,446	1.19%	▲846,965	+48.75%	$275.55Mn
20	CITADEL ADVISORS LLC	0001423053	2,556,973	1.18%	▲374,402	+17.15%	$272.62Mn

Showing 1 to 20 of 669 holders