Kiniksa Pharmaceuticals, Ltd. (KNSA) ownership: Top institutional holder: FMR LLC ($328.56M). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| FMR LLC | 6823700.00 | $328.56M | 2026-03-31 |
| Rubric Capital Management LP | 3750000.00 | $180.56M | 2026-03-31 |
| BAKER BROS. ADVISORS LP | 2826246.00 | $136.08M | 2026-03-31 |
| VANGUARD GROUP INC | 3112937.00 | $128.41M | 2025-12-31 |
| TANG CAPITAL MANAGEMENT LLC | 2259889.00 | $108.81M | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1766268.00 | $85.05M | 2026-03-31 |
| ACADIAN ASSET MANAGEMENT LLC | 1336313.00 | $64.32M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 1333093.00 | $64.19M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-01 | |
| Sell | null | 2026-05-01 | |
| Sell | null | 2026-05-01 | |
| Sell | null | 2026-05-01 | |
| Sell | null | 2026-05-01 | |
| Sell | null | 2026-05-01 | |
| Sell | null | 2026-05-01 | |
| Sell | null | 2026-04-30 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.