Kiniksa Pharmaceuticals International (KNSA) Institutional Ownership

$78.08 -1.72 (-2.16%)

As of 08/28/2026 04:00 PM Eastern

Current Institutional Ownership Percentage: 53.95%
Number of Institutional Buyers (last 12 months): 122
Total Institutional Inflows (last 12 months): $527.10M

Number of Institutional Sellers (last 12 months): 67
Total Institutional Outflows (last 12 months): $214.95M

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KNSA Institutional Buying and Selling by Quarter

Kiniksa Pharmaceuticals International 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
8/27/2026	Corient Private Wealth LP	10,214	$653K	0.0%	+26.8%	0.013%
8/25/2026	VIRGINIA RETIREMENT SYSTEMS ET Al	4,000	$256K	0.0%	N/A	0.005%
8/24/2026	California State Teachers Retirement System	2,721,648	$174.05M	0.0%	+6,384.0%	3.488%
8/22/2026	TD Waterhouse Canada Inc.	16,691	$1.05M	0.0%	+4.5%	0.021%
8/21/2026	Braidwell LP	183,822	$11.76M	0.4%	-32.5%	0.236%
8/21/2026	Nykredit A S	530	$34K	0.0%	N/A	0.001%
8/20/2026	Headlands Technologies LLC	18,161	$1.16M	0.1%	N/A	0.023%
7/10/2026	Handelsbanken Fonder AB	21,000	$1.34M	0.0%	N/A	0.027%
7/7/2026	Financial Enhancement Group LLC	31,391	$2.01M	0.2%	N/A	0.041%
5/19/2026	Bank of America Corp DE	735,940	$35.44M	0.0%	+220.9%	0.957%
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5/19/2026	Janus Henderson Group PLC	481,023	$23.20M	0.0%	+213.5%	0.625%
5/18/2026	ADAR1 Capital Management LLC	26,913	$1.30M	0.1%	-6.3%	0.035%
5/18/2026	California State Teachers Retirement System	41,975	$2.02M	0.0%	+33.3%	0.055%
5/18/2026	Rubric Capital Management LP	3,750,000	$180.56M	1.9%	+12.7%	4.874%
5/16/2026	The Manufacturers Life Insurance Company	63,346	$3.05M	0.0%	+56.7%	0.082%
5/16/2026	Lazard Asset Management LLC	21,432	$1.03M	0.0%	-84.7%	0.028%
5/16/2026	Castleark Management LLC	181,512	$8.74M	0.3%	-5.6%	0.236%
5/16/2026	Orbimed Advisors LLC	180,599	$8.70M	0.2%	-3.5%	0.235%
5/15/2026	OMERS ADMINISTRATION Corp	13,100	$631K	0.0%	N/A	0.017%
5/15/2026	Rice Hall James & Associates LLC	608,416	$29.30M	1.6%	+2.0%	0.791%
5/15/2026	Granahan Investment Management LLC	209,256	$10.08M	0.5%	-33.8%	0.272%
5/15/2026	Spruce Street Capital LP	761,063	$36.65M	8.8%	+75.0%	0.989%
5/14/2026	Healthcare of Ontario Pension Plan Trust Fund	88,600	$4.27M	0.0%	-40.4%	0.115%
5/14/2026	Arrowstreet Capital Limited Partnership	892,666	$42.98M	0.0%	-16.4%	1.160%
5/14/2026	Sei Investments Co.	284,005	$13.68M	0.0%	+30.6%	0.369%
5/14/2026	State of Wyoming	12,976	$625K	0.1%	-2.3%	0.017%
5/13/2026	First Trust Advisors LP	9,876	$476K	0.0%	+3.1%	0.013%
5/7/2026	Dimensional Fund Advisors LP	811,922	$39.09M	0.0%	+18.8%	1.061%
5/7/2026	KBC Group NV	706	$34K	0.0%	N/A	0.001%
5/7/2026	Swiss National Bank	71,500	$3.44M	0.0%	+4.2%	0.093%
5/7/2026	Precision Wealth Strategies LLC	14,063	$677K	0.2%	N/A	0.018%
5/6/2026	Allspring Global Investments Holdings LLC	15,356	$739K	0.0%	+11.5%	0.020%
5/5/2026	Bank of New York Mellon Corp	17,388	$837K	0.0%	+20.2%	0.023%
5/1/2026	Kornitzer Capital Management Inc. KS	21,369	$1.03M	0.0%	-3.3%	0.028%
4/30/2026	Hsbc Holdings PLC	5,157	$248K	0.0%	N/A	0.007%
4/30/2026	Roman Butler Fullerton & Co.	5,852	$275K	0.1%	-8.4%	0.008%
4/24/2026	Peregrine Capital Management LLC	181,360	$8.73M	0.3%	-14.0%	0.237%
4/23/2026	AMI Asset Management Corp	21,943	$1.06M	0.1%	-49.1%	0.029%
4/23/2026	Inspire Investing LLC	35,271	$1.70M	0.1%	N/A	0.046%
4/22/2026	Pictet Asset Management Holding SA	623,288	$30.01M	0.0%	-20.9%	0.814%
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4/21/2026	Cannon Global Investment Management LLC	11,000	$530K	1.0%	N/A	0.014%
4/16/2026	SG Americas Securities LLC	640,179	$30.83M	0.0%	+18.2%	0.836%
2/23/2026	Virtu Financial LLC	6,466	$267K	0.0%	N/A	0.009%
2/19/2026	Invesco Ltd.	32,334	$1.33M	0.0%	+25.9%	0.043%
2/18/2026	Mercer Global Advisors Inc. ADV	7,684	$317K	0.0%	+7.1%	0.010%
2/18/2026	Empowered Funds LLC	1,243	$51K	0.0%	N/A	0.002%
2/18/2026	XTX Topco Ltd	7,062	$291K	0.0%	N/A	0.009%
2/18/2026	Voloridge Investment Management LLC	228,933	$9.44M	0.0%	-23.3%	0.302%
2/18/2026	Virtus Investment Advisers LLC	16,432	$678K	0.2%	+2.5%	0.022%
2/18/2026	SummitTX Capital L.P.	48,808	$2.01M	0.1%	N/A	0.064%
2/18/2026	Tang Capital Management LLC	2,259,889	$93.22M	4.6%	-3.0%	2.981%
2/18/2026	Tudor Investment Corp ET AL	11,249	$464K	0.0%	-37.1%	0.015%
2/18/2026	Twinbeech Capital LP	10,828	$447K	0.0%	N/A	0.014%
2/18/2026	Orbimed Advisors LLC	187,199	$7.72M	0.2%	N/A	0.247%
2/18/2026	Millennium Management LLC	825,285	$34.04M	0.0%	-18.6%	1.089%
2/18/2026	Man Group plc	39,447	$1.63M	0.0%	-41.9%	0.052%
2/18/2026	Janus Henderson Group PLC	153,428	$6.33M	0.0%	+1,159.8%	0.202%
2/18/2026	Engineers Gate Manager LP	39,873	$1.65M	0.0%	-54.4%	0.053%
2/18/2026	Baker BROS. Advisors LP	2,826,246	$116.58M	0.7%	+0.1%	3.729%
2/17/2026	Logos Global Management LP	350,000	$14.44M	0.9%	N/A	0.462%
2/17/2026	ADAR1 Capital Management LLC	28,728	$1.19M	0.1%	-61.8%	0.038%
2/17/2026	Schonfeld Strategic Advisors LLC	63,995	$2.64M	0.0%	-23.7%	0.084%
2/17/2026	AQR Capital Management LLC	353,062	$14.56M	0.0%	+6.2%	0.466%
2/17/2026	Braidwell LP	313,823	$12.95M	0.4%	-51.2%	0.414%
2/17/2026	Lazard Asset Management LLC	140,301	$5.79M	0.0%	+1.4%	0.185%
2/17/2026	Jain Global LLC	31,806	$1.31M	0.0%	+52.0%	0.042%
2/17/2026	ArrowMark Colorado Holdings LLC	333,702	$13.77M	0.3%	-2.0%	0.440%
2/17/2026	Quantedge Capital Pte Ltd	6,545	$270K	0.1%	-56.5%	0.009%
2/17/2026	Trexquant Investment LP	225,128	$9.29M	0.1%	-37.4%	0.297%
2/17/2026	Amundi	23,496	$969K	0.0%	N/A	0.031%
2/17/2026	Jump Financial LLC	91,429	$3.77M	0.0%	-19.0%	0.121%
2/17/2026	Public Employees Retirement System of Ohio	28,955	$1.19M	0.0%	N/A	0.038%
2/17/2026	Russell Investments Group Ltd.	3,194	$131K	0.0%	-93.5%	0.004%
2/17/2026	Granahan Investment Management LLC	316,213	$13.04M	0.6%	+11.5%	0.417%
2/17/2026	State of Wisconsin Investment Board	16,799	$693K	0.0%	-6.0%	0.022%
2/17/2026	ExodusPoint Capital Management LP	7,958	$328K	0.0%	-86.7%	0.010%
2/17/2026	Graham Capital Management L.P.	12,960	$535K	0.0%	+96.5%	0.017%
2/17/2026	Magnetar Financial LLC	15,295	$631K	0.0%	N/A	0.020%
2/17/2026	Rice Hall James & Associates LLC	596,431	$24.60M	1.4%	+3.2%	0.787%
2/16/2026	Spruce Street Capital LP	434,982	$17.94M	5.9%	N/A	0.574%
2/16/2026	Mariner LLC	13,519	$558K	0.0%	+2.0%	0.018%
2/16/2026	Healthcare of Ontario Pension Plan Trust Fund	148,774	$6.14M	0.0%	+22.5%	0.196%
2/16/2026	Barclays PLC	4,577	$189K	0.0%	-37.8%	0.006%
2/13/2026	Marshall Wace LLP	5,800	$239K	0.0%	-90.5%	0.008%
2/13/2026	The Manufacturers Life Insurance Company	40,429	$1.66M	0.0%	N/A	0.053%
2/13/2026	Walleye Capital LLC	143,293	$5.91M	0.0%	-65.3%	0.189%
2/13/2026	Rubric Capital Management LP	3,328,653	$137.31M	1.6%	-16.8%	4.391%
2/13/2026	Smartleaf Asset Management LLC	889	$36K	0.0%	N/A	0.001%
2/13/2026	Morgan Stanley	1,360,044	$56.10M	0.0%	-0.2%	1.794%
2/13/2026	Essex Investment Management Co. LLC	250,975	$10.35M	1.6%	+1.5%	0.331%
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2/13/2026	First Trust Advisors LP	9,583	$395K	0.0%	+18.8%	0.013%
2/13/2026	OpenArc Corporate Advisory LLC	33,862	$1.40M	0.0%	N/A	0.045%
2/13/2026	Charles Schwab Investment Management Inc.	63,530	$2.62M	0.0%	-2.4%	0.084%
2/13/2026	State Street Corp	73,002	$3.01M	0.0%	-2.7%	0.096%
2/13/2026	Ieq Capital LLC	47,841	$1.97M	0.0%	+4.0%	0.063%
2/13/2026	UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	42,402	$1.75M	0.0%	-23.6%	0.056%
2/13/2026	Wells Fargo & Company MN	54,393	$2.24M	0.0%	+609.4%	0.072%
2/13/2026	Castleark Management LLC	192,192	$7.93M	0.2%	+21.2%	0.254%
2/12/2026	Brooklyn Investment Group	11,968	$491K	0.0%	+41.1%	0.016%
2/12/2026	Orion Porfolio Solutions LLC	15,573	$642K	0.0%	+76.8%	0.021%

KNSA Institutional Ownership - Frequently Asked Questions

During the previous two years, 231 institutional investors and hedge funds held shares of Kiniksa Pharmaceuticals International. The most heavily invested institutionals were Rubric Capital Management LP ($180.56M), California State Teachers Retirement System ($174.05M), Vanguard Group Inc. ($128.41M), Baker BROS. Advisors LP ($116.58M), Tang Capital Management LLC ($93.22M), Morgan Stanley ($56.10M), and Fairmount Funds Management LLC ($43.40M).Learn more on Kiniksa Pharmaceuticals International's institutional investors.

53.95% of Kiniksa Pharmaceuticals International's stock is owned by institutional investors. Learn more on KNSA's institutional investor holdings.

Of the 202 institutional investors that purchased Kiniksa Pharmaceuticals International's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: California State Teachers Retirement System ($2.69M), Braidwell LP ($1.39M), Arrowstreet Capital Limited Partnership ($1.07M), Rubric Capital Management LP ($1.04M), Acadian Asset Management LLC ($885.37K), Bank of America Corp DE ($767.07K), and Nuveen LLC ($765.05K).

Institutional investors have bought a total of 11,119,784 shares in the last 24 months. This purchase volume represents approximately $527.10M in transactions.

Of the 67 institutional investors that sold Kiniksa Pharmaceuticals International's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Braidwell LP ($877.46K), Rubric Capital Management LP ($671.35K), Squarepoint Ops LLC ($331.37K), Pictet Asset Management Holding SA ($308.81K), Walleye Capital LLC ($269.69K), Qube Research & Technologies Ltd ($198.48K), and Algert Global LLC ($196.34K).

Institutional investors have sold a total of 5,160,135 shares in the last 24 months. This volume of shares sold represents approximately $214.95M in transactions.

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Institutional ownership data for NASDAQ:KNSA is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 8/27/2026. New 13F filings are added each quarter as they're published.

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Kiniksa Pharmaceuticals International (KNSA) Institutional Ownership

KNSA Institutional Buying and Selling by Quarter

Kiniksa Pharmaceuticals International Major Shareholders & Ownership History

KNSA Institutional Ownership - Frequently Asked Questions

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Kiniksa Pharmaceuticals International (KNSA) Institutional Ownership

Institutional Ownership Changes (13F Filings) for Kiniksa Pharmaceuticals International (NASDAQ:KNSA)

KNSA Institutional Buying and Selling by Quarter

Kiniksa Pharmaceuticals International Major Shareholders & Ownership History

KNSA Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of KNSA shares?

What percentage of Kiniksa Pharmaceuticals International's stock is owned by institutional investors?

Which institutional investors have been buying Kiniksa Pharmaceuticals International's stock?

How much institutional buying is happening at Kiniksa Pharmaceuticals International?

Which of Kiniksa Pharmaceuticals International's major shareholders have been selling company stock?

How much institutional selling is happening at Kiniksa Pharmaceuticals International?

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