Who owns Kiniksa Pharmaceuticals International, plc, from the filings themselves: stakes over 5% (Schedule 13D/G), the institutional managers reporting the stock each quarter (13F), and the funds holding it (N-PORT).
Investors crossing 5% ownership must disclose it. Schedule 13G filers certify the stake is passive; Schedule 13D is the general form for everyone else — founders, strategic holders, and activists alike. Each entry is the holder's most recent disclosure. Coverage begins with SEC's structured filings from December 18, 2024; a holder appears once they file or amend after that date.
Baker Bros. Advisors LP: 6.9% · 3,231,181 shares — Baker Bros. Advisors (GP) LLC: 6.9% · 3,231,181 shares — Julian C. Baker: 7.0% · 3,253,341 shares
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See every investor who has disclosed crossing 5% of Kiniksa Pharmaceuticals International, plc.
Sign up freeEvery institutional manager whose latest 13F reports this stock, largest position first. "% of their portfolio" is the weight inside that manager's own book — how much conviction the position represents; "% of company" is how much of Kiniksa Pharmaceuticals International, plc they hold. Together these 328 managers report 70.32% of shares outstanding.
| Investor | Position value | Shares | % of their portfolio | % of company | As of |
|---|---|---|---|---|---|
| FMR LLC | $446M | 6,971,361 | 0.02% | 8.99% | June 30, 2026 |
| Rubric Capital Management LP | $256M | 3,999,800 | 2.35% | 5.16% | June 30, 2026 |
326 more institutional holders behind a free account
See every manager reporting Kiniksa Pharmaceuticals International, plc, how much of the company they hold, and how big the position is inside their own portfolio.
Sign up freeFunds disclosing this stock in their monthly N-PORT portfolio, with the position's share of the fund's net assets. Together these 53 funds hold 6.18% of shares outstanding — counted inside the manager totals above, not on top of them, since a fund's shares also appear in its manager's 13F.
| Fund | Position value | % of net assets | % of company | As of |
|---|---|---|---|---|
| VANGUARD TOTAL STOCK MARKET INDEX FUND | $84.3M | 0.00% | 1.70% | June 30, 2026 |
| VANGUARD SMALL-CAP INDEX FUND | $61.1M | 0.03% | 1.23% | June 30, 2026 |
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