KNSA: Kiniksa Pharmaceuticals International, plc insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 0 sales totaling - in the last 180 days.
Activist and 5% holders
| Filed | What | Holder | Stake | Change | Filing |
|---|---|---|---|---|---|
| 2026-07-29 | New 13G stake | BlackRock, Inc. | 5.50% | SEC |
Institutional ownership (Q2 2026)
267 institutions reported holding $2.91B of Kiniksa Pharmaceuticals International, plc on Form 13F (227 the quarter before). 68 opened a new position and 26 sold out. Shares held by institutions: +3%.
| Largest holders | Shares | Value |
|---|---|---|
| FMR LLC | 6,971,361 | $445.82M |
| Rubric Capital Management LP | 3,999,800 | $255.79M |
| BAKER BROS. ADVISORS LP | 2,834,643 | $181.28M |
| BlackRock, Inc. | 2,739,615 | $175.20M |
| TANG CAPITAL MANAGEMENT LLC | 2,259,889 | $144.52M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1,911,335 | $122.23M |
| VANGUARD CAPITAL MANAGEMENT LLC | 1,360,840 | $87.03M |
| MORGAN STANLEY | 1,011,143 | $64.66M |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 957,514 | $61.23M |
| Spruce Street Capital LP | 918,070 | $58.71M |
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