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Kiniksa Pharmaceuticals International (KNSA) Institutional Ownership

Kiniksa Pharmaceuticals International logo
$79.78 +1.03 (+1.31%)
Closing price 10/9/2026 04:00 PM Eastern
Extended Trading
$79.79 +0.01 (+0.01%)
As of 10/9/2026 07:30 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Institutional Ownership Changes (13F Filings) for Kiniksa Pharmaceuticals International (NASDAQ:KNSA)

Current
Institutional Ownership
Percentage
53.95%
Number of
Institutional Buyers
(last 12 months)
124
Total
Institutional Inflows
(last 12 months)
$355.57M
Number of
Institutional Sellers
(last 12 months)
69
Total
Institutional Outflows
(last 12 months)
$216.57M
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KNSA Institutional Buying and Selling by Quarter

Kiniksa Pharmaceuticals International Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
10/9/2026GAMMA Investing LLC1,278$95K0.0%+21.1%0.002%
10/8/2026CoreCap Advisors LLC4,620$345K0.0%N/A0.006%
10/8/2026City Center Advisors LLC5,271$393K0.3%N/A0.007%
10/6/2026Juncture Wealth Strategies LLC17,549$1.31M0.3%-1.5%0.022%
9/9/2026Tidal Investments LLC4,135$264K0.0%-33.1%0.005%
9/9/2026Engineers Gate Manager LP3,680$235K0.0%-42.5%0.005%
9/9/2026Integrated Wealth Concepts LLC2,763$177K0.0%N/A0.004%
9/9/2026Squarepoint Ops LLC140,059$8.96M0.0%-11.4%0.180%
9/9/2026Baird Financial Group Inc.30,708$1.96M0.0%-23.7%0.039%
9/8/2026Allworth Financial LP453$29K0.0%+42.0%0.001%
9/8/2026Arizona State Retirement System10,132$648K0.0%+2.1%0.013%
9/8/2026Nykredit A S530$34K0.0%N/A0.001%
8/27/2026Corient Private Wealth LP10,214$653K0.0%+26.8%0.013%
8/25/2026VIRGINIA RETIREMENT SYSTEMS ET Al4,000$256K0.0%N/A0.005%
8/22/2026TD Waterhouse Canada Inc.16,691$1.05M0.0%+4.5%0.021%
8/21/2026Braidwell LP183,822$11.76M0.4%-32.5%0.236%
8/21/2026Nykredit A S530$34K0.0%N/A0.001%
8/20/2026Headlands Technologies LLC18,161$1.16M0.1%N/A0.023%
7/10/2026Handelsbanken Fonder AB21,000$1.34M0.0%N/A0.027%
7/7/2026Financial Enhancement Group LLC31,391$2.01M0.2%N/A0.041%
5/19/2026Bank of America Corp DE735,940$35.44M0.0%+220.9%0.957%
5/19/2026Janus Henderson Group PLC481,023$23.20M0.0%+213.5%0.625%
5/18/2026ADAR1 Capital Management LLC26,913$1.30M0.1%-6.3%0.035%
5/18/2026California State Teachers Retirement System41,975$2.02M0.0%+33.3%0.055%
5/18/2026Rubric Capital Management LP3,750,000$180.56M1.9%+12.7%4.874%
5/16/2026The Manufacturers Life Insurance Company63,346$3.05M0.0%+56.7%0.082%
5/16/2026Lazard Asset Management LLC21,432$1.03M0.0%-84.7%0.028%
5/16/2026Castleark Management LLC181,512$8.74M0.3%-5.6%0.236%
5/16/2026Orbimed Advisors LLC180,599$8.70M0.2%-3.5%0.235%
5/15/2026OMERS ADMINISTRATION Corp13,100$631K0.0%N/A0.017%
5/15/2026Rice Hall James & Associates LLC608,416$29.30M1.6%+2.0%0.791%
5/15/2026Granahan Investment Management LLC209,256$10.08M0.5%-33.8%0.272%
5/15/2026Spruce Street Capital LP761,063$36.65M8.8%+75.0%0.989%
5/14/2026Healthcare of Ontario Pension Plan Trust Fund88,600$4.27M0.0%-40.4%0.115%
5/14/2026Arrowstreet Capital Limited Partnership892,666$42.98M0.0%-16.4%1.160%
5/14/2026Sei Investments Co.284,005$13.68M0.0%+30.6%0.369%
5/14/2026State of Wyoming12,976$625K0.1%-2.3%0.017%
5/13/2026First Trust Advisors LP9,876$476K0.0%+3.1%0.013%
5/7/2026Dimensional Fund Advisors LP811,922$39.09M0.0%+18.8%1.061%
5/7/2026KBC Group NV706$34K0.0%N/A0.001%
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5/7/2026Swiss National Bank71,500$3.44M0.0%+4.2%0.093%
5/7/2026Precision Wealth Strategies LLC14,063$677K0.2%N/A0.018%
5/6/2026Allspring Global Investments Holdings LLC15,356$739K0.0%+11.5%0.020%
5/5/2026Bank of New York Mellon Corp17,388$837K0.0%+20.2%0.023%
5/1/2026Kornitzer Capital Management Inc. KS21,369$1.03M0.0%-3.3%0.028%
4/30/2026Hsbc Holdings PLC5,157$248K0.0%N/A0.007%
4/30/2026Roman Butler Fullerton & Co.5,852$275K0.1%-8.4%0.008%
4/24/2026Peregrine Capital Management LLC181,360$8.73M0.3%-14.0%0.237%
4/23/2026AMI Asset Management Corp21,943$1.06M0.1%-49.1%0.029%
4/23/2026Inspire Investing LLC35,271$1.70M0.1%N/A0.046%
4/22/2026Pictet Asset Management Holding SA623,288$30.01M0.0%-20.9%0.814%
4/21/2026Cannon Global Investment Management LLC11,000$530K1.0%N/A0.014%
4/16/2026SG Americas Securities LLC640,179$30.83M0.0%+18.2%0.836%
2/23/2026Virtu Financial LLC6,466$267K0.0%N/A0.009%
2/19/2026Invesco Ltd.32,334$1.33M0.0%+25.9%0.043%
2/18/2026Mercer Global Advisors Inc. ADV7,684$317K0.0%+7.1%0.010%
2/18/2026Empowered Funds LLC1,243$51K0.0%N/A0.002%
2/18/2026XTX Topco Ltd7,062$291K0.0%N/A0.009%
2/18/2026Voloridge Investment Management LLC228,933$9.44M0.0%-23.3%0.302%
2/18/2026Virtus Investment Advisers LLC16,432$678K0.2%+2.5%0.022%
2/18/2026SummitTX Capital L.P.48,808$2.01M0.1%N/A0.064%
2/18/2026Tang Capital Management LLC2,259,889$93.22M4.6%-3.0%2.981%
2/18/2026Tudor Investment Corp ET AL11,249$464K0.0%-37.1%0.015%
2/18/2026Twinbeech Capital LP10,828$447K0.0%N/A0.014%
2/18/2026Orbimed Advisors LLC187,199$7.72M0.2%N/A0.247%
2/18/2026Millennium Management LLC825,285$34.04M0.0%-18.6%1.089%
2/18/2026Man Group plc39,447$1.63M0.0%-41.9%0.052%
2/18/2026Janus Henderson Group PLC153,428$6.33M0.0%+1,159.8%0.202%
2/18/2026Engineers Gate Manager LP39,873$1.65M0.0%-54.4%0.053%
2/18/2026Baker BROS. Advisors LP2,826,246$116.58M0.7%+0.1%3.729%
2/17/2026Logos Global Management LP350,000$14.44M0.9%N/A0.462%
2/17/2026ADAR1 Capital Management LLC28,728$1.19M0.1%-61.8%0.038%
2/17/2026Schonfeld Strategic Advisors LLC63,995$2.64M0.0%-23.7%0.084%
2/17/2026AQR Capital Management LLC353,062$14.56M0.0%+6.2%0.466%
2/17/2026Braidwell LP313,823$12.95M0.4%-51.2%0.414%
2/17/2026Lazard Asset Management LLC140,301$5.79M0.0%+1.4%0.185%
2/17/2026Jain Global LLC31,806$1.31M0.0%+52.0%0.042%
2/17/2026ArrowMark Colorado Holdings LLC333,702$13.77M0.3%-2.0%0.440%
2/17/2026Quantedge Capital Pte Ltd6,545$270K0.1%-56.5%0.009%
2/17/2026Trexquant Investment LP225,128$9.29M0.1%-37.4%0.297%
2/17/2026Amundi23,496$969K0.0%N/A0.031%
2/17/2026Jump Financial LLC91,429$3.77M0.0%-19.0%0.121%
2/17/2026Public Employees Retirement System of Ohio28,955$1.19M0.0%N/A0.038%
2/17/2026Russell Investments Group Ltd.3,194$131K0.0%-93.5%0.004%
2/17/2026Granahan Investment Management LLC316,213$13.04M0.6%+11.5%0.417%
2/17/2026State of Wisconsin Investment Board16,799$693K0.0%-6.0%0.022%
2/17/2026ExodusPoint Capital Management LP7,958$328K0.0%-86.7%0.010%
2/17/2026Graham Capital Management L.P.12,960$535K0.0%+96.5%0.017%
2/17/2026Magnetar Financial LLC15,295$631K0.0%N/A0.020%
2/17/2026Rice Hall James & Associates LLC596,431$24.60M1.4%+3.2%0.787%
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2/16/2026Spruce Street Capital LP434,982$17.94M5.9%N/A0.574%
2/16/2026Mariner LLC13,519$558K0.0%+2.0%0.018%
2/16/2026Healthcare of Ontario Pension Plan Trust Fund148,774$6.14M0.0%+22.5%0.196%
2/16/2026Barclays PLC4,577$189K0.0%-37.8%0.006%
2/13/2026Marshall Wace LLP5,800$239K0.0%-90.5%0.008%
2/13/2026The Manufacturers Life Insurance Company 40,429$1.66M0.0%N/A0.053%
2/13/2026Walleye Capital LLC143,293$5.91M0.0%-65.3%0.189%
2/13/2026Rubric Capital Management LP3,328,653$137.31M1.6%-16.8%4.391%
2/13/2026Smartleaf Asset Management LLC889$36K0.0%N/A0.001%
2/13/2026Morgan Stanley1,360,044$56.10M0.0%-0.2%1.794%


KNSA Institutional Ownership - Frequently Asked Questions

During the previous two years, 236 institutional investors and hedge funds held shares of Kiniksa Pharmaceuticals International. The most heavily invested institutionals were Rubric Capital Management LP ($180.56M), Vanguard Group Inc. ($128.41M), Baker BROS. Advisors LP ($116.58M), Tang Capital Management LLC ($93.22M), Morgan Stanley ($56.10M), Fairmount Funds Management LLC ($43.40M), and Arrowstreet Capital Limited Partnership ($42.98M).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 207 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: 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), Nuveen LLC ($765.05K), and Spruce Street Capital LP ($761.06K).

Institutional investors have bought a total of 8,424,061 shares in the last 24 months. This purchase volume represents approximately $355.57M in transactions.

Of the 69 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 ($349.41K), 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 5,180,564 shares in the last 24 months. This volume of shares sold represents approximately $216.57M 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 10/9/2026. New 13F filings are added each quarter as they're published.
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