SEC Form 4 · Updated Daily
KNSA
— KINIKSA PHARMACEUTICALS INTERNATIONAL, PLC OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| BAKER FELIX | 10%+ Owner · Director | 2,744,894 | 2026-05-29 | A |
| 667, L.P. | 10%+ Owner · Director | 2,744,894 | 2026-05-29 | A |
| BAKER JULIAN | 10%+ Owner · Director | 2,744,894 | 2026-05-29 | A |
| BAKER BROS. ADVISORS LP | 10%+ Owner · Director | 2,744,894 | 2026-05-29 | A |
| Baker Bros. Advisors (GP) LLC | 10%+ Owner · Director | 2,744,894 | 2026-05-29 | A |
| Baker Brothers Life Sciences LP | 10%+ Owner · Director | 2,744,894 | 2026-05-29 | A |
| Cormorant Asset Management, LP | 10%+ Owner | 900,443 | 2018-05-29 | P |
| Cormorant Global Healthcare Master Fund, LP | 10%+ Owner | 900,443 | 2018-05-29 | P |
| Chen Bihua | 10%+ Owner | 900,443 | 2018-05-29 | P |
| Cormorant Global Healthcare GP, LLC | 10%+ Owner | 900,443 | 2018-05-29 | P |
| DEERFIELD PARTNERS, L.P. | 10%+ Owner | 843,352 | 2018-05-29 | P |
| Flynn James E | 10%+ Owner | 843,352 | 2018-05-29 | P |
| DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) | 10%+ Owner | 843,352 | 2018-05-29 | P |
| Deerfield Mgmt L.P. | 10%+ Owner | 843,352 | 2018-05-29 | P |
| Deerfield Special Situations Fund, L.P. | Reporting Owner | 843,352 | 2018-05-29 | P |
| Beetham Thomas W. | Officer | 300,000 | 2021-02-03 | C |
| Patel Sanj K | Director · Officer | 107,492 | 2026-09-01 | M |
| BOESS CARSTEN | Director | 79,589 | 2018-05-29 | C |
| Mahoney Stephen F. | Officer | 79,589 | 2018-05-29 | C |
| Paolini John F. | Officer | 73,951 | 2026-09-01 | M |
| Heberlig Chris | Officer | 42,991 | 2018-05-29 | C |
| Megna Michael R | Officer | 39,193 | 2026-09-01 | M |
| Ragosa Mark | Officer | 25,258 | 2026-09-01 | M |
| Tessari Eben | Officer | 23,976 | 2026-04-07 | M |
| Levy Richard S | Director | 22,359 | 2026-08-01 | M |
| Moat Ross | Officer | 20,314 | 2026-09-01 | M |
| Popovits Kimberly J | Director | 15,345 | 2026-05-29 | M |
| McCain Tracey L | Director | 15,345 | 2026-05-29 | M |
| Malley Thomas | Director | 15,345 | 2026-05-29 | M |
| Quart Barry D | Director | 12,745 | 2026-08-19 | G |
| Cole G Bradley | Director | 11,672 | 2026-07-29 | S |
| Rizvi Qasim | Officer | 7,337 | 2020-12-31 | M |
| Pano Arian | Officer | 1,539 | 2021-06-10 | — |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-09-03 | Megna Michael R | Open-market sale | 4,600 | $80.30 | 29,062 |
| 2026-09-01 | Megna Michael R | Option exercise (derivative) | 3,932 | $0.00 | 0 |
| 2026-09-01 | Megna Michael R | Option exercise (derivative) | 2,558 | $0.00 | 2,557 |
| 2026-09-01 | Megna Michael R | Option exercise (derivative) | 2,362 | $0.00 | 4,725 |
| 2026-09-01 | Megna Michael R | Option exercise (derivative) | 2,644 | $0.00 | 7,931 |
| 2026-09-01 | Megna Michael R | Grant / award (derivative) | 14,600 | $0.00 | 14,600 |
| 2026-09-01 | Megna Michael R | Grant / award (derivative) | 3,650 | $0.00 | 3,650 |
| 2026-09-01 | Megna Michael R | Tax withholding | 5,531 | $79.28 | 33,662 |
| 2026-09-01 | Megna Michael R | Option exercise | 2,644 | — | 39,193 |
| 2026-09-01 | Megna Michael R | Option exercise | 2,362 | — | 36,549 |
| 2026-09-01 | Megna Michael R | Option exercise | 2,558 | — | 34,187 |
| 2026-09-01 | Megna Michael R | Option exercise | 3,932 | — | 31,629 |
| 2026-09-01 | Moat Ross | Option exercise (derivative) | 2,477 | $0.00 | 0 |
| 2026-09-01 | Moat Ross | Option exercise (derivative) | 1,611 | $0.00 | 1,611 |
| 2026-09-01 | Moat Ross | Option exercise (derivative) | 1,740 | $0.00 | 3,481 |
| 2026-09-01 | Moat Ross | Option exercise (derivative) | 2,457 | $0.00 | 7,371 |
| 2026-09-01 | Moat Ross | Grant / award (derivative) | 36,950 | $0.00 | 36,950 |
| 2026-09-01 | Moat Ross | Grant / award (derivative) | 9,250 | $0.00 | 9,250 |
| 2026-09-01 | Moat Ross | Tax withholding | 4,007 | $79.28 | 16,307 |
| 2026-09-01 | Moat Ross | Option exercise | 2,457 | — | 20,314 |
| 2026-09-01 | Moat Ross | Option exercise | 1,740 | — | 17,857 |
| 2026-09-01 | Moat Ross | Option exercise | 1,611 | — | 16,117 |
| 2026-09-01 | Moat Ross | Option exercise | 2,477 | — | 14,506 |
| 2026-09-01 | Paolini John F. | Option exercise (derivative) | 2,497 | $0.00 | 0 |
| 2026-09-01 | Paolini John F. | Option exercise (derivative) | 1,624 | $0.00 | 1,624 |
| 2026-09-01 | Paolini John F. | Option exercise (derivative) | 1,750 | $0.00 | 3,500 |
| 2026-09-01 | Paolini John F. | Option exercise (derivative) | 2,457 | $0.00 | 7,371 |
| 2026-09-01 | Paolini John F. | Grant / award (derivative) | 26,750 | $0.00 | 26,750 |
| 2026-09-01 | Paolini John F. | Grant / award (derivative) | 6,700 | $0.00 | 6,700 |
| 2026-09-01 | Paolini John F. | Tax withholding | 4,029 | $79.28 | 69,922 |
| 2026-09-01 | Paolini John F. | Option exercise | 2,457 | — | 73,951 |
| 2026-09-01 | Paolini John F. | Option exercise | 1,750 | — | 71,494 |
| 2026-09-01 | Paolini John F. | Option exercise | 1,624 | — | 69,744 |
| 2026-09-01 | Paolini John F. | Option exercise | 2,497 | — | 68,120 |
| 2026-09-01 | Patel Sanj K | Option exercise (derivative) | 9,991 | $0.00 | 0 |
| 2026-09-01 | Patel Sanj K | Option exercise (derivative) | 6,481 | $0.00 | 6,481 |
| 2026-09-01 | Patel Sanj K | Option exercise (derivative) | 6,237 | $0.00 | 12,475 |
| 2026-09-01 | Patel Sanj K | Option exercise (derivative) | 8,609 | $0.00 | 25,826 |
| 2026-09-01 | Patel Sanj K | Grant / award (derivative) | 120,150 | $0.00 | 120,150 |
| 2026-09-01 | Patel Sanj K | Grant / award (derivative) | 30,050 | $0.00 | 30,050 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.