Insmed (INSM) Institutional Ownership

$125.77 +0.69 (+0.55%)

As of 08/21/2026 04:00 PM Eastern

Number of Institutional Buyers (last 12 months): 426
Total Institutional Inflows (last 12 months): $6.05B

Number of Institutional Sellers (last 12 months): 210
Total Institutional Outflows (last 12 months): $4.50B

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INSM Institutional Buying and Selling by Quarter

Insmed Major Shareholders & Ownership History

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Reporting Date	Major Shareholder Name	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
8/23/2026	Saudi Central Bank	14,732	$1.57M	0.0%	+87.1%	0.007%
8/22/2026	AlphaGrep UK Ltd	2,811	$300K	0.1%	N/A	0.001%
8/22/2026	denkapparat Operations GmbH	1,946	$207K	0.1%	N/A	0.001%
8/22/2026	Concurrent Investment Advisors LLC	4,161	$444K	0.0%	-19.1%	0.002%
8/21/2026	AXQ Capital LP	22,813	$2.43M	0.3%	N/A	0.010%
8/21/2026	Nykredit A S	103,144	$11.00M	0.0%	N/A	0.047%
8/21/2026	B. Metzler seel. Sohn & Co. AG	40,521	$4.32M	0.0%	+3.3%	0.019%
8/20/2026	Nwam LLC	5,071	$541K	0.0%	-88.7%	0.002%
8/20/2026	Railway Pension Investments Ltd	604,700	$64.47M	0.8%	N/A	0.277%
8/20/2026	Headlands Technologies LLC	40,855	$4.36M	0.5%	+1,355.0%	0.019%
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8/20/2026	Quantitative Investment Management LLC	15,894	$1.69M	0.2%	+11.1%	0.007%
8/19/2026	Wellington Management Group LLP	543,893	$57.99M	0.0%	+36.3%	0.249%
8/18/2026	Public Employees Retirement System of Ohio	61,152	$6.52M	0.0%	N/A	0.028%
8/6/2026	Bank of New York Mellon Corp	1,312,756	$139.97M	0.0%	N/A	0.606%
8/6/2026	S&CO Inc.	13,000	$1.39M	0.1%	N/A	0.006%
7/10/2026	Tema ETFs LLC	3,405	$363K	0.0%	-22.9%	0.002%
7/10/2026	E. Ohman J or Asset Management AB	7,789	$830K	0.0%	+48.7%	0.004%
7/10/2026	Handelsbanken Fonder AB	189,581	$20.21M	0.1%	+180.9%	0.087%
7/10/2026	Wealthcare Advisory Partners LLC	4,672	$498K	0.0%	N/A	0.002%
7/8/2026	FNY Investment Advisers LLC	1,300	$138K	0.0%	N/A	0.001%
7/8/2026	PensionDanmark Pensionsforsikringsaktieselskab	31,393	$3.35M	0.0%	+8.0%	0.014%
7/8/2026	Assenagon Asset Management S.A.	218,270	$23.27M	0.0%	+245.0%	0.101%
7/7/2026	Avior Wealth Management LLC	4,913	$524K	0.0%	+23.0%	0.002%
7/7/2026	Harbor Investment Advisory LLC	486	$52K	0.0%	N/A	0.000%
6/18/2026	Pacer Advisors Inc.	7,279	$1.19M	0.0%	-53.3%	0.003%
6/16/2026	Empowered Funds LLC	51,986	$8.50M	0.1%	+32.6%	0.024%
6/12/2026	Defilade Capital Management L.P.	194,909	$31.87M	4.5%	+289.8%	0.090%
6/3/2026	Parallel Advisors LLC	2,291	$375K	0.0%	+13.1%	0.001%
6/3/2026	NewEdge Advisors LLC	6,015	$984K	0.0%	+133.0%	0.003%
6/1/2026	NWI Management LP	1,014,000	$165.81M	9.4%	+2.6%	0.468%
5/26/2026	Glenmede Trust Co. NA	1,916	$313K	0.0%	+5.4%	0.001%
5/19/2026	Bank of America Corp DE	1,502,281	$245.65M	0.0%	-12.9%	0.693%
5/19/2026	Edgestream Partners L.P.	2,499	$409K	0.0%	-39.3%	0.001%
5/19/2026	Janus Henderson Group PLC	419,304	$68.56M	0.0%	-47.6%	0.193%
5/18/2026	ADAR1 Capital Management LLC	35,392	$5.79M	0.3%	N/A	0.016%
5/18/2026	Amundi	804,977	$131.63M	0.0%	-12.2%	0.371%
5/18/2026	California State Teachers Retirement System	303,182	$49.58M	0.1%	-2.3%	0.140%
5/18/2026	Royal Bank of Canada	523,101	$85.54M	0.0%	+3.2%	0.241%
5/18/2026	Rock Springs Capital Management LP	314,300	$51.39M	3.0%	-1.6%	0.145%
5/18/2026	Eagle Health Investments LP	224,271	$36.67M	6.4%	+6.3%	0.103%
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5/18/2026	Empowered Funds LLC	51,986	$8.50M	0.1%	+32.6%	0.024%
5/18/2026	Exome Asset Management LLC	26,651	$4.36M	2.3%	N/A	0.012%
5/16/2026	The Manufacturers Life Insurance Company	72,696	$11.89M	0.0%	-38.8%	0.034%
5/16/2026	Quantinno Capital Management LP	35,552	$5.81M	0.0%	+81.9%	0.016%
5/16/2026	SummitTX Capital L.P.	23,153	$3.79M	0.1%	-10.8%	0.011%
5/15/2026	OMERS ADMINISTRATION Corp	2,204	$360K	0.0%	N/A	0.001%
5/15/2026	Lombard Odier Asset Management Switzerland SA	4,403	$720K	0.0%	N/A	0.002%
5/15/2026	Affinity Asset Advisors LLC	480,000	$78.49M	4.1%	+6.7%	0.221%
5/15/2026	Entropy Technologies LP	4,332	$708K	0.0%	N/A	0.002%
5/14/2026	Healthcare of Ontario Pension Plan Trust Fund	56,529	$9.24M	0.0%	-13.4%	0.026%
5/14/2026	Renaissance Technologies LLC	20,300	$3.32M	0.0%	-21.6%	0.009%
5/14/2026	Gabelli Funds LLC	2,700	$442K	0.0%	+46.7%	0.001%
5/14/2026	Public Employees Retirement System of Ohio	60,951	$9.97M	0.0%	-3.3%	0.028%
5/14/2026	Compound Planning Inc.	27,862	$4.56M	0.1%	+0.8%	0.013%
5/14/2026	Inceptionr LLC	5,172	$846K	0.2%	N/A	0.002%
5/14/2026	Bank of Nova Scotia	15,203	$2.49M	0.0%	-75.0%	0.007%
5/14/2026	Sei Investments Co.	1,395,794	$228.24M	0.2%	+56.8%	0.644%
5/14/2026	Lido Advisors LLC	1,980	$324K	0.0%	+27.5%	0.001%
5/13/2026	Cetera Investment Advisers	34,356	$5.62M	0.0%	-10.6%	0.016%
5/13/2026	Aureus Asset Management LLC	6,000	$981K	0.1%	N/A	0.003%
5/13/2026	NewEdge Wealth LLC	4,208	$688K	0.0%	+18.9%	0.002%
5/13/2026	CI Investments Inc.	2,214	$362K	0.0%	-10.6%	0.001%
5/13/2026	First Trust Advisors LP	229,563	$37.54M	0.0%	-7.4%	0.106%
5/12/2026	ABN Amro Investment Solutions	13,143	$2.15M	0.0%	+31.6%	0.006%
5/8/2026	PNC Financial Services Group Inc.	8,910	$1.46M	0.0%	+29.9%	0.004%
5/8/2026	Andra AP fonden	77,970	$12.75M	0.2%	+114.8%	0.036%
5/7/2026	Meeder Advisory Services Inc.	3,987	$652K	0.0%	-16.6%	0.002%
5/7/2026	WCM Investment Management LLC	15,707	$2.41M	0.0%	+51.5%	0.007%
5/7/2026	Dimensional Fund Advisors LP	400,900	$65.47M	0.0%	+0.5%	0.186%
5/7/2026	Parallel Advisors LLC	2,291	$375K	0.0%	+13.1%	0.001%
5/7/2026	AlphaCentric Advisors LLC	8,874	$1.45M	1.4%	+16.9%	0.004%
5/7/2026	KBC Group NV	37,347	$6.11M	0.0%	+9.8%	0.017%
5/7/2026	SEB Asset Management AB	165,576	$27.08M	0.1%	N/A	0.077%
5/7/2026	Swiss National Bank	625,912	$102.35M	0.1%	+8.1%	0.290%
5/7/2026	ANB Bank	1,507	$246K	0.1%	-22.6%	0.001%
5/6/2026	Jennison Associates LLC	604,694	$98.88M	0.1%	+7.5%	0.280%
5/6/2026	California Public Employees Retirement System	344,612	$56.35M	0.0%	-2.9%	0.160%
5/6/2026	Simon Quick Advisors LLC	50,065	$8.19M	0.4%	N/A	0.023%
5/6/2026	Assetmark Inc.	34,258	$5.60M	0.0%	-13.8%	0.016%
5/6/2026	C WorldWide Group Holding A S	161,110	$26.35M	0.6%	+18.4%	0.075%
5/6/2026	Bessemer Group Inc.	823	$135K	0.0%	-15.0%	0.000%
5/6/2026	Allspring Global Investments Holdings LLC	282,734	$46.61M	0.1%	+28.5%	0.131%
5/5/2026	Wealthfront Advisers LLC	18,404	$3.01M	0.0%	+84.2%	0.009%
5/5/2026	Bank of New York Mellon Corp	1,262,749	$206.49M	0.0%	-9.2%	0.585%
5/5/2026	Harel Insurance Investments & Financial Services Ltd.	1,084	$177K	0.0%	N/A	0.001%
5/5/2026	MASTERINVEST Kapitalanlage GmbH	4,640	$759K	0.1%	N/A	0.002%
5/5/2026	Livforsakringsbolaget Skandia Omsesidigt	4,412	$721K	0.0%	+194.1%	0.002%
5/5/2026	Sanctuary Advisors LLC	23,969	$3.92M	0.0%	+12.3%	0.011%
5/5/2026	Nwam LLC	44,883	$7.34M	0.4%	+15.1%	0.021%
5/4/2026	Calamos Advisors LLC	36,373	$5.95M	0.0%	+13.1%	0.017%
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5/4/2026	Emerald Mutual Fund Advisers Trust	8,230	$1.35M	0.1%	-37.8%	0.004%
5/4/2026	Principal Financial Group Inc.	916,464	$149.86M	0.1%	+18.8%	0.425%
5/4/2026	J. Safra Sarasin Holding AG	93,181	$15.24M	0.3%	+1,342.2%	0.043%
5/2/2026	International Assets Investment Management LLC	699	$115K	0.0%	+111.8%	0.000%
5/2/2026	Diversify Wealth Management LLC	1,704	$279K	0.0%	N/A	0.001%
5/1/2026	Fifth Third Bancorp	18,200	$2.98M	0.0%	+4,983.8%	0.008%
5/1/2026	American Trust	1,710	$280K	0.0%	+12.9%	0.001%
5/1/2026	Candriam S.C.A.	401,735	$65.69M	0.3%	+0.2%	0.186%
5/1/2026	Sequoia Financial Advisors LLC	4,385	$717K	0.0%	-26.2%	0.002%
4/30/2026	Hsbc Holdings PLC	116,456	$19.04M	0.0%	-5.5%	0.054%

INSM Institutional Ownership - Frequently Asked Questions

During the previous two years, 674 institutional investors and hedge funds held shares of Insmed. The most heavily invested institutionals were Vanguard Group Inc. ($3.67B), Darwin Global Management Ltd. ($3.64B), Baker BROS. Advisors LP ($1.15B), State Street Corp ($905.31M), Capital International Investors ($896.60M), Artisan Partners Limited Partnership ($843.01M), and RTW Investments LP ($842.86M).Learn more on Insmed's institutional investors.

Of the 598 institutional investors that purchased Insmed's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Norges Bank ($6.68M), Vanguard Group Inc. ($4.56M), Darwin Global Management Ltd. ($4.05M), Orbis Allan Gray Ltd ($2.45M), Adage Capital Partners GP L.L.C. ($2.41M), Artisan Partners Limited Partnership ($1.96M), and RTW Investments LP ($1.76M).

Institutional investors have bought a total of 37,747,786 shares in the last 24 months. This purchase volume represents approximately $6.05B in transactions.

Of the 210 institutional investors that sold Insmed's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Price T Rowe Associates Inc. MD ($2.89M), Capital International Investors ($2.40M), Baker BROS. Advisors LP ($1.12M), Adage Capital Partners GP L.L.C. ($952.50K), Holocene Advisors LP ($933.13K), Westfield Capital Management Co. LP ($906.77K), and Royal Bank of Canada ($848.52K).

Institutional investors have sold a total of 27,980,656 shares in the last 24 months. This volume of shares sold represents approximately $4.50B in transactions.

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Institutional ownership data for NASDAQ:INSM is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 8/23/2026. New 13F filings are added each quarter as they're published.

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Insmed (INSM) Institutional Ownership

INSM Institutional Buying and Selling by Quarter

Insmed Major Shareholders & Ownership History

INSM Institutional Ownership - Frequently Asked Questions

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Insmed (INSM) Institutional Ownership

Institutional Ownership Changes (13F Filings) for Insmed (NASDAQ:INSM)

INSM Institutional Buying and Selling by Quarter

Insmed Major Shareholders & Ownership History

INSM Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of INSM shares?

Which institutional investors have been buying Insmed's stock?

How much institutional buying is happening at Insmed?

Which of Insmed's major shareholders have been selling company stock?

How much institutional selling is happening at Insmed?

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