There is a long list of 293 institutional holders of INSM within the last two holding periods in our database of 13F filers, so we've sorted through to present to you just the top 50 institutional holders of INSM by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-INSM table below, the initial column indicates the name of each top institutional holder of INSM, with a link to that fund's top holdings. The next columns indicate the amount of INSM stock held by each of the institutional holders of INSM, followed by the INSM position size held by the institution, and finally the date of the quarterly 13F filing period the holdings data represents for that institution.

Holder	Amount	Position Size ($ in 1000's)	As of
Vanguard Group Inc.	14,125,521	$437,750	12/31/2023
INSM	14,125,521	$437,750	12/31/2023
BlackRock Inc.		$360,827	12/31/2023
INSM	11,492,282	$356,146	12/31/2023
NOTE 0	4,099,000	$4,681	12/31/2023
Price T Rowe Associates Inc. MD	10,763,771	$333,571	12/31/2023
INSM	10,763,771	$333,571	12/31/2023
State Street Corp		$198,511	12/31/2023
INSM	5,929,933	$183,769	12/31/2023
NOTE 0	11,925,000	$13,651	12/31/2023
NOTE 1	1,026,000	$1,091	12/31/2023
T. Rowe Price Investment Management Inc.	5,850,606	$181,311	12/31/2023
INSM	5,850,606	$181,311	12/31/2023
Franklin Resources Inc.		$174,085	12/31/2023
INSM	3,396,727	$105,265	12/31/2023
NOTE 0	60,000,000	$68,820	12/31/2023
Palo Alto Investors LP	5,511,721	$170,808	12/31/2023
INSM	5,511,721	$170,808	12/31/2023
Deep Track Capital LP	5,350,000	$165,796	12/31/2023
INSM	5,350,000	$165,796	12/31/2023
FMR LLC		$164,927	12/31/2023
INSM	5,091,614	$157,789	12/31/2023
NOTE 0	6,250,000	$7,138	12/31/2023
Macquarie Group Ltd.		$145,558	12/31/2023
INSM	4,651,492	$144,150	12/31/2023
NOTE 1	1,330,000	$1,408	12/31/2023
William Blair Investment Management LLC	4,256,687	$131,915	12/31/2023
INSM	4,256,687	$131,915	12/31/2023
Deerfield Management Company L.P. Series C		$123,486	12/31/2023
NOTE 1	116,954,000	$123,486	12/31/2023
Geode Capital Management LLC	3,069,378	$95,131	12/31/2023
INSM	3,069,378	$95,131	12/31/2023
Suvretta Capital Management LLC	2,684,487	$83,192	12/31/2023
INSM	2,684,487	$83,192	12/31/2023
Wolverine Asset Management LLC		$82,840	12/31/2023
NOTE 0	68,460,000	$78,500	12/31/2023
NOTE 1	4,249,000	$4,551	12/31/2023
Put	6,800	$211	12/31/2023
Ameriprise Financial Inc.		$82,191	12/31/2023
INSM	2,282,491	$70,734	12/31/2023
CONV BND	10,032,000	$11,457	12/31/2023
Bank of New York Mellon Corp		$73,498	12/31/2023
INSM	2,356,862	$73,039	12/31/2023
NOTE	400,000	$459	12/31/2023
Loomis Sayles & Co. L P	2,331,505	$72,253	12/31/2023
INSM	2,331,505	$72,253	12/31/2023
Bellevue Group AG	2,290,958	$70,997	12/31/2023
INSM	2,290,958	$70,997	12/31/2023
Alliancebernstein L.P.	2,147,902	$66,563	12/31/2023
INSM	2,147,902	$66,563	12/31/2023
Citadel Advisors LLC		$66,002	12/31/2023
INSM	1,046,214	$32,422	12/31/2023
NOTE 0	27,852,000	$31,950	12/31/2023
Call	65,100	$2,017	12/31/2023
Put	12,500	$387	12/31/2023
Pictet Asset Management Holding SA	1,961,801	$60,796	12/31/2023
INSM	1,961,801	$60,796	12/31/2023
RTW Investments LP	1,865,108	$57,800	12/31/2023
INSM	1,865,108	$57,800	12/31/2023
Braidwell LP		$56,123	12/31/2023
NOTE 1	52,388,000	$56,123	12/31/2023
Morgan Stanley		$55,769	12/31/2023
INSM	1,534,747	$47,562	12/31/2023
NOTE 0	7,183,000	$8,207	12/31/2023
Holocene Advisors LP	1,614,862	$50,045	12/31/2023
INSM	1,614,862	$50,045	12/31/2023
Millennium Management LLC	1,605,001	$49,739	12/31/2023
INSM	1,605,001	$49,739	12/31/2023
Balyasny Asset Management LLC		$49,642	12/31/2023
NOTE 0	32,436,000	$37,189	12/31/2023
INSM	943,431	$29,237	12/31/2023
Put	541,600	$16,784	12/31/2023
D. E. Shaw & Co. Inc.		$49,136	12/31/2023
NOTE	25,330,000	$29,088	12/31/2023
INSM	646,907	$20,048	12/31/2023
Norges Bank	1,453,025	$45,029	12/31/2023
INSM	1,453,025	$45,029	12/31/2023
Marshall Wace LLP	1,439,769	$44,618	12/31/2023
INSM	1,439,769	$44,618	12/31/2023
Janus Henderson Group PLC	1,403,091	$43,482	12/31/2023
INSM	1,403,091	$43,482	12/31/2023
Northern Trust Corp	1,372,245	$42,526	12/31/2023
INSM	1,372,245	$42,526	12/31/2023
Principal Financial Group Inc.	1,359,563	$42,133	12/31/2023
INSM	1,359,563	$42,133	12/31/2023
Novo Holdings A S	1,339,304	$41,505	12/31/2023
INSM	1,339,304	$41,505	12/31/2023
GW&K Investment Management LLC	1,291,772	$40,032	12/31/2023
INSM	1,291,772	$40,032	12/31/2023
Samlyn Capital LLC	1,286,868	$39,880	12/31/2023
INSM	1,286,868	$39,880	12/31/2023
Octagon Capital Advisors LP	1,284,000	$39,791	12/31/2023
INSM	1,284,000	$39,791	12/31/2023
Charles Schwab Investment Management Inc.	1,128,436	$34,970	12/31/2023
INSM	1,128,436	$34,970	12/31/2023
Bank of America Corp DE		$32,355	12/31/2023
INSM	1,043,831	$32,348	12/31/2023
NOTE 0	6,000	$7	12/31/2023
Calamos Advisors LLC		$29,428	12/31/2023
NOTE 0	25,677,000	$29,428	12/31/2023
Emerald Advisers LLC	930,849	$28,847	12/31/2023
INSM	930,849	$28,847	12/31/2023
Hood River Capital Management LLC	905,819	$28,071	12/31/2023
INSM	905,819	$28,071	12/31/2023
Vestal Point Capital LP	900,000	$27,891	12/31/2023
INSM	900,000	$27,891	12/31/2023
BNP PARIBAS ASSET MANAGEMENT Holding S.A.	895,946	$27,765	12/31/2023
INSM	895,946	$27,765	12/31/2023
Whitebox Advisors LLC		$27,751	12/31/2023
NOTE 0	24,300,000	$27,751	12/31/2023
Goldman Sachs Group Inc.	761,772	$23,607	12/31/2023
INSM	761,772	$23,607	12/31/2023
Emerald Mutual Fund Advisers Trust	748,344	$23,191	12/31/2023
INSM	748,344	$23,191	12/31/2023
FIL Ltd	691,431	$21,427	12/31/2023
INSM	691,431	$21,427	12/31/2023
American Century Companies Inc.	662,200	$20,522	12/31/2023
INSM	662,200	$20,522	12/31/2023

See All: Funds Holding INSM
See Details: Top 10 Hedge Funds Holding INSM
Also See: INSM Insider Buying
Also See: INSM Holdings Changes

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