Kiniksa Pharmaceuticals International (KNSA) Institutional Ownership $53.65 -0.63 (-1.16%) Closing price 04:00 PM EasternExtended Trading$53.64 -0.01 (-0.02%) As of 04:42 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. Add Compare Share Share Ownership Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Institutional Ownership Changes (13F Filings) for Kiniksa Pharmaceuticals International (NASDAQ:KNSA)CurrentInstitutional OwnershipPercentage53.95%Number ofInstitutional Buyers(last 12 months)142TotalInstitutional Inflows(last 12 months)$478.38MNumber ofInstitutional Sellers(last 12 months)85TotalInstitutional Outflows(last 12 months)$271.96M Get KNSA Insider Trade Alerts Want to know when executives and insiders are buying or selling Kiniksa Pharmaceuticals International stock? Sign up for InsiderTrades.com's daily newsletter to get the latest insider transactions delivered to your inbox daily. 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Skip Chart & View Institutional Buying and Selling Data KNSA Institutional Buying and Selling by Quarter Kiniksa Pharmaceuticals International Major Shareholders & Ownership History ExportReporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails5/19/2026 Bank of America Corp DE735,940$35.44M0.0%+220.9%0.957% 5/19/2026 Janus Henderson Group PLC481,023$23.20M0.0%+213.5%0.625% 5/18/2026 ADAR1 Capital Management LLC26,913$1.30M0.1%-6.3%0.035% 5/18/2026 California State Teachers Retirement System41,975$2.02M0.0%+33.3%0.055% 5/18/2026 Rubric Capital Management LP3,750,000$180.56M1.9%+12.7%4.874% 5/16/2026 The Manufacturers Life Insurance Company 63,346$3.05M0.0%+56.7%0.082% 5/16/2026 Lazard Asset Management LLC21,432$1.03M0.0%-84.7%0.028% 5/16/2026 Castleark Management LLC181,512$8.74M0.3%-5.6%0.236% 5/16/2026 Orbimed Advisors LLC180,599$8.70M0.2%-3.5%0.235% 5/15/2026 OMERS ADMINISTRATION Corp13,100$631K0.0%N/A0.017% Get the Latest News and Ratings for KNSA and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Kiniksa Pharmaceuticals International and its competitors with MarketBeat's FREE daily newsletter. 5/15/2026 Rice Hall James & Associates LLC608,416$29.30M1.6%+2.0%0.791% 5/15/2026 Granahan Investment Management LLC209,256$10.08M0.5%-33.8%0.272% 5/15/2026 Spruce Street Capital LP761,063$36.65M8.8%+75.0%0.989% 5/14/2026 Healthcare of Ontario Pension Plan Trust Fund88,600$4.27M0.0%-40.4%0.115% 5/14/2026 Arrowstreet Capital Limited Partnership892,666$42.98M0.0%-16.4%1.160% 5/14/2026 Sei Investments Co.284,005$13.68M0.0%+30.6%0.369% 5/14/2026 State of Wyoming12,976$625K0.1%-2.3%0.017% 5/13/2026 First Trust Advisors LP9,876$476K0.0%+3.1%0.013% 5/7/2026 Dimensional Fund Advisors LP811,922$39.09M0.0%+18.8%1.061% 5/7/2026 KBC Group NV706$34K0.0%N/A0.001% 5/7/2026 Swiss National Bank71,500$3.44M0.0%+4.2%0.093% 5/7/2026 Precision Wealth Strategies LLC14,063$677K0.2%N/A0.018% 5/6/2026 Allspring Global Investments Holdings LLC15,356$739K0.0%+11.5%0.020% 5/5/2026 Bank of New York Mellon Corp17,388$837K0.0%+20.2%0.023% 5/1/2026 Kornitzer Capital Management Inc. KS21,369$1.03M0.0%-3.3%0.028% 4/30/2026 Hsbc Holdings PLC5,157$248K0.0%N/A0.007% 4/30/2026 Roman Butler Fullerton & Co.5,852$275K0.1%-8.4%0.008% 4/24/2026 Peregrine Capital Management LLC181,360$8.73M0.3%-14.0%0.237% 4/23/2026 AMI Asset Management Corp21,943$1.06M0.1%-49.1%0.029% 4/23/2026 Inspire Investing LLC35,271$1.70M0.1%N/A0.046% 4/22/2026 Pictet Asset Management Holding SA623,288$30.01M0.0%-20.9%0.814% 4/21/2026 Cannon Global Investment Management LLC11,000$530K1.0%N/A0.014% 4/16/2026 SG Americas Securities LLC640,179$30.83M0.0%+18.2%0.836% 2/23/2026 Virtu Financial LLC6,466$267K0.0%N/A0.009% 2/19/2026 Invesco Ltd.32,334$1.33M0.0%+25.9%0.043% 2/18/2026 Mercer Global Advisors Inc. ADV7,684$317K0.0%+7.1%0.010% 2/18/2026 Empowered Funds LLC1,243$51K0.0%N/A0.002% 2/18/2026 XTX Topco Ltd7,062$291K0.0%N/A0.009% 2/18/2026 Voloridge Investment Management LLC228,933$9.44M0.0%-23.3%0.302% 2/18/2026 Virtus Investment Advisers LLC16,432$678K0.2%+2.5%0.022% The 1934 playbook (Ad)In 1934, a legal government maneuver transferred billions in wealth overnight. Most Americans never saw it coming — but those who did walked away wealthy.Trump holds that same legal authority today. Advisors close to the administration believe he may use it.If he does, the transfer moves fast. The window to position yourself on the right side is already closing.Get the free report now2/18/2026 SummitTX Capital L.P.48,808$2.01M0.1%N/A0.064% 2/18/2026 Tang Capital Management LLC2,259,889$93.22M4.6%-3.0%2.981% 2/18/2026 Tudor Investment Corp ET AL11,249$464K0.0%-37.1%0.015% 2/18/2026 Twinbeech Capital LP10,828$447K0.0%N/A0.014% 2/18/2026 Orbimed Advisors LLC187,199$7.72M0.2%N/A0.247% 2/18/2026 Millennium Management LLC825,285$34.04M0.0%-18.6%1.089% 2/18/2026 Man Group plc39,447$1.63M0.0%-41.9%0.052% 2/18/2026 Janus Henderson Group PLC153,428$6.33M0.0%+1,159.8%0.202% 2/18/2026 Engineers Gate Manager LP39,873$1.65M0.0%-54.4%0.053% 2/18/2026 Baker BROS. Advisors LP2,826,246$116.58M0.7%+0.1%3.729% 2/17/2026 Logos Global Management LP350,000$14.44M0.9%N/A0.462% 2/17/2026 ADAR1 Capital Management LLC28,728$1.19M0.1%-61.8%0.038% 2/17/2026 Schonfeld Strategic Advisors LLC63,995$2.64M0.0%-23.7%0.084% 2/17/2026 AQR Capital Management LLC353,062$14.56M0.0%+6.2%0.466% 2/17/2026 Braidwell LP313,823$12.95M0.4%-51.2%0.414% 2/17/2026 Lazard Asset Management LLC140,301$5.79M0.0%+1.4%0.185% 2/17/2026 Jain Global LLC31,806$1.31M0.0%+52.0%0.042% 2/17/2026 ArrowMark Colorado Holdings LLC333,702$13.77M0.3%-2.0%0.440% 2/17/2026 Quantedge Capital Pte Ltd6,545$270K0.1%-56.5%0.009% 2/17/2026 Trexquant Investment LP225,128$9.29M0.1%-37.4%0.297% 2/17/2026 Amundi23,496$969K0.0%N/A0.031% 2/17/2026 Jump Financial LLC91,429$3.77M0.0%-19.0%0.121% 2/17/2026 Public Employees Retirement System of Ohio28,955$1.19M0.0%N/A0.038% 2/17/2026 Russell Investments Group Ltd.3,194$131K0.0%-93.5%0.004% 2/17/2026 Granahan Investment Management LLC316,213$13.04M0.6%+11.5%0.417% 2/17/2026 State of Wisconsin Investment Board16,799$693K0.0%-6.0%0.022% 2/17/2026 ExodusPoint Capital Management LP7,958$328K0.0%-86.7%0.010% 2/17/2026 Graham Capital Management L.P.12,960$535K0.0%+96.5%0.017% 2/17/2026 Magnetar Financial LLC15,295$631K0.0%N/A0.020% 2/17/2026 Rice Hall James & Associates LLC596,431$24.60M1.4%+3.2%0.787% 2/16/2026 Spruce Street Capital LP434,982$17.94M5.9%N/A0.574% 2/16/2026 Mariner LLC13,519$558K0.0%+2.0%0.018% 2/16/2026 Healthcare of Ontario Pension Plan Trust Fund148,774$6.14M0.0%+22.5%0.196% 2/16/2026 Barclays PLC4,577$189K0.0%-37.8%0.006% 2/13/2026 Marshall Wace LLP5,800$239K0.0%-90.5%0.008% 2/13/2026 The Manufacturers Life Insurance Company 40,429$1.66M0.0%N/A0.053% 2/13/2026 Walleye Capital LLC143,293$5.91M0.0%-65.3%0.189% 2/13/2026 Rubric Capital Management LP3,328,653$137.31M1.6%-16.8%4.391% 2/13/2026 Smartleaf Asset Management LLC889$36K0.0%N/A0.001% 2/13/2026 Morgan Stanley1,360,044$56.10M0.0%-0.2%1.794% 2/13/2026 Essex Investment Management Co. LLC250,975$10.35M1.6%+1.5%0.331% 2/13/2026 First Trust Advisors LP9,583$395K0.0%+18.8%0.013% 2/13/2026 OpenArc Corporate Advisory LLC33,862$1.40M0.0%N/A0.045% 2/13/2026 Charles Schwab Investment Management Inc.63,530$2.62M0.0%-2.4%0.084% 2/13/2026 State Street Corp73,002$3.01M0.0%-2.7%0.096% 2/13/2026 Ieq Capital LLC47,841$1.97M0.0%+4.0%0.063% 2/13/2026 UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC42,402$1.75M0.0%-23.6%0.056% 2/13/2026 Wells Fargo & Company MN54,393$2.24M0.0%+609.4%0.072% 2/13/2026 Castleark Management LLC192,192$7.93M0.2%+21.2%0.254% 2/12/2026 Brooklyn Investment Group11,968$491K0.0%+41.1%0.016% ALERT: Drop these 5 stocks before the market opens tomorrow! (Ad)The Wall Street Journal is already raising the alarm about a potential market crash, and Weiss Ratings research points to the first half of 2026 as a particularly rough stretch for certain holdings. 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If any of these are in your portfolio, now is the time to review your positions.See the 5 stocks to avoid2/12/2026 Orion Porfolio Solutions LLC15,573$642K0.0%+76.8%0.021% 2/12/2026 Dimensional Fund Advisors LP683,505$28.19M0.0%+8.1%0.902% 2/12/2026 Mark Sheptoff Financial Planning LLC16,350$674K0.3%+1.6%0.022% 2/12/2026 Informed Momentum Co LLC96,018$3.96M0.4%-2.0%0.127% 2/12/2026 Campbell & CO Investment Adviser LLC5,869$242K0.0%-84.6%0.008% 2/12/2026CIBC Private Wealth Group LLC1,000$41K0.0%N/A0.001% 2/12/2026 Swiss National Bank68,600$2.83M0.0%+4.4%0.091% 2/11/2026 Empowered Funds LLC1,243$51K0.0%N/A0.002% 2/11/2026 Financiere des Professionnels Fonds d investissement inc.5,376$222K0.0%N/A0.007% 2/11/2026 Deutsche Bank AG630,291$26M0.0%+18.2%0.832% KNSA Institutional Ownership - Frequently Asked Questions Who are the largest shareholders of KNSA shares? During the previous two years, 230 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. What percentage of Kiniksa Pharmaceuticals International's stock is owned by institutional investors? 53.95% of Kiniksa Pharmaceuticals International's stock is owned by institutional investors. Learn more on KNSA's institutional investor holdings. Which institutional investors have been buying Kiniksa Pharmaceuticals International's stock? 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: Braidwell LP ($1.39M), Rubric Capital Management LP ($1.26M), Arrowstreet Capital Limited Partnership ($1.07M), Acadian Asset Management LLC ($885.37K), Bank of America Corp DE ($767.07K), Nuveen LLC ($765.05K), and Spruce Street Capital LP ($761.06K). How much institutional buying is happening at Kiniksa Pharmaceuticals International? Institutional investors have bought a total of 12,983,226 shares in the last 24 months. This purchase volume represents approximately $478.38M in transactions. Which of Kiniksa Pharmaceuticals International's major shareholders have been selling company stock? Of the 85 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 ($1.65M), Rubric Capital Management LP ($671.35K), Geode Capital Management LLC ($454.51K), Squarepoint Ops LLC ($331.37K), Pictet Asset Management Holding SA ($308.81K), Walleye Capital LLC ($269.69K), and Hudson Bay Capital Management LP ($258.44K). How much institutional selling is happening at Kiniksa Pharmaceuticals International? Institutional investors have sold a total of 7,347,482 shares in the last 24 months. This volume of shares sold represents approximately $271.96M in transactions. Related Companies Genmab A/S Major Shareholders Ascendis Pharma A/S Major Shareholders Summit Therapeutics Major Shareholders BridgeBio Pharma Major Shareholders Regencell Bioscience Major Shareholders Axsome Therapeutics Major Shareholders Dr. Reddy's Laboratories Major Shareholders Arrowhead Pharmaceuticals Major Shareholders Elanco Animal Health Major Shareholders Cytokinetics Major Shareholders This page (NASDAQ:KNSA) was last updated on 5/21/2026 by MarketBeat.com Staff. 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