Kiniksa Pharmaceuticals International, plc (KNSA) Institutional Ownership Changes & 13F Activity

Kiniksa Pharmaceuticals International, plc (KNSA). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Invesco Ltd., Millennium Management Llc, Citadel Advisors Llc, D. E. Shaw & Co., Inc., and Qube Research & Technologies Ltd.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Manufacturers Life Insurance Company, TheBuy+4,369+6.9%67,715$4.33MQ2 2026Sep 09, 2026
Citadel Advisors LlcSell-433,085-91.2%41,665$2.66MQ2 2026Sep 02, 2026
Cornerstone Financial Management LlcBuy+1+2.3%44$2.81KQ2 2026Aug 28, 2026
Corient Private Wealth LlcBuy+2,158+26.8%10,214$653.18KQ2 2026Aug 27, 2026
California State Teachers Retirement SystemBuy+584+1.4%42,559$2.72MQ2 2026Aug 24, 2026
Mercer Global Advisors IncBuy+13+0.1%8,973$573.82KQ2 2026Aug 19, 2026
Invesco Ltd.Buy+772,806772,806$49.42MQ2 2026Aug 14, 2026
Millennium Management LlcSell-471,056-83.5%93,364$5.97MQ2 2026Aug 14, 2026
D. E. Shaw & Co., Inc.Sell-389,501-40.6%569,756$36.44MQ2 2026Aug 14, 2026
Qube Research & Technologies LtdSell-382,773-55.7%304,080$19.45MQ2 2026Aug 14, 2026
Susquehanna International Group, LlpSell-365,580-95.3%18,231$1.17MQ2 2026Aug 14, 2026
Bank Of America CorpSell-322,529-43.8%413,411$26.44MQ2 2026Aug 14, 2026
Rubric Capital Management LpBuy+249,800+6.7%3,999,800$255.79MQ2 2026Aug 14, 2026
Orbimed Advisors LlcBuy+240,001+132.9%420,600$26.90MQ2 2026Aug 14, 2026
Stempoint Capital LpBuy+209,234209,234$13.38MQ2 2026Aug 14, 2026
Balyasny Asset Management L.P.Sell-190,110-38.0%309,682$19.80MQ2 2026Aug 14, 2026
Two Sigma Investments, LpBuy+140,566+33.4%561,480$35.91MQ2 2026Aug 14, 2026
Driehaus Capital Management LlcBuy+106,801+17.5%718,199$45.93MQ2 2026Aug 14, 2026
Sei Investments CoSell-95,440-33.6%188,565$12.06MQ2 2026Aug 14, 2026
Oberweis Asset Management Inc/Buy+94,400+29.6%413,034$26.41MQ2 2026Aug 14, 2026
Braidwell LpSell-88,700-32.5%183,822$11.76MQ2 2026Aug 14, 2026
Voleon Capital Management LpSell-87,579-72.7%32,806$2.10MQ2 2026Aug 14, 2026
Man Group PlcSell-86,662-68.1%40,524$2.59MQ2 2026Aug 14, 2026
Trexquant Investment LpSell-81,773-60.4%53,507$3.42MQ2 2026Aug 14, 2026
Nomura Holdings IncSell-72,215-21.1%270,724$17.31MQ2 2026Aug 14, 2026
Granahan Investment Management, LlcSell-57,531-27.5%151,725$9.70MQ2 2026Aug 14, 2026
Charles Schwab Investment Management IncBuy+51,276+101.9%101,575$6.50MQ2 2026Aug 14, 2026
Brevan Howard Capital Management LpSell-48,924-90.8%4,958$317.06KQ2 2026Aug 14, 2026
Lazard Asset Management LlcBuy+45,859+214.0%67,291$4.30MQ2 2026Aug 14, 2026
Alliancebernstein L.P.Sell-42,737-7.1%556,151$26.78MQ2 2026Aug 14, 2026
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Frequently asked questions about KNSA activity

  • Which institutional owners are buying KNSA?

    Institutional owners buying KNSA include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in KNSA activity?

    "Buy" means an investor increased their reported position in KNSA compared to the prior reporting period. This reflects growing exposure to Kiniksa Pharmaceuticals International, plc (KNSA) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in KNSA increasing?

    Institutional interest in KNSA can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.