Kiniksa Pharmaceuticals Ltd
Ownership
Ownership Structure
Who owns Kiniksa Pharmaceuticals Ltd (KNSA)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 82.5% of the shares are freely tradable; institutional investors hold 104.7%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| FMR Inc | 8.75 | 6,823,700 | +315.4 | 03/31/2026 |
| Rubric Capital Management LP | 4.81 | 3,750,000 | +12.7 | 03/31/2026 |
| Baker Bros Advisors LP | 3.62 | 2,826,246 | +0.0 | 03/31/2026 |
| TANG CAPITAL MANAGEMENT LLC | 2.90 | 2,259,889 | +0.0 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 2.26 | 1,766,268 | +0.0 | 03/31/2026 |
| Acadian Asset Management LLC | 1.71 | 1,336,313 | +41,738.2 | 03/31/2026 |
| Vanguard Capital Management, LLC | 1.71 | 1,333,093 | +0.0 | 03/31/2026 |
| Morgan Stanley - Brokerage Accounts | 1.28 | 997,786 | -26.6 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 1.69 | 1,322,189 | -0.1 | 08/31/2026 |
| iShares Russell 2000 ETF | 1.38 | 1,076,213 | -0.6 | 08/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Patel Sanj K | CHAIRMAN & CEO | 92,348 | 6,935,335 $ | Sep 1, 2026 | indirect |
| Paolini John F. | CHIEF MEDICAL OFFICER | 69,922 | 5,251,142 $ | Sep 1, 2026 | direct |
| Megna Michael R | CHIEF ACCOUNTING OFFICER | 29,062 | 2,182,556 $ | Sep 3, 2026 | direct |
| Ragosa Mark | CHIEF FINANCIAL OFFICER | 20,854 | 1,566,135 $ | Sep 1, 2026 | direct |
| Moat Ross | CHIEF OPERATING OFFICER | 16,307 | 1,224,656 $ | Sep 1, 2026 | direct |
| Quart Barry D | Director | 12,745 | 957,149 $ | Aug 19, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 3, 2026 | Megna Michael R | CHIEF ACCOUNTING OFFICER | Sell | 4,600 | 80.30 | 369,380 |
| Sep 1, 2026 | Moat Ross | CHIEF OPERATING OFFICER | Other | 4,007 | 79.28 | 317,675 |
| Sep 1, 2026 | Moat Ross | CHIEF OPERATING OFFICER | Other | 2,457 | – | – |
| Sep 1, 2026 | Moat Ross | CHIEF OPERATING OFFICER | Other | 1,740 | – | – |
| Sep 1, 2026 | Moat Ross | CHIEF OPERATING OFFICER | Other | 1,611 | – | – |
| Sep 1, 2026 | Moat Ross | CHIEF OPERATING OFFICER | Other | 2,477 | – | – |
| Sep 1, 2026 | Ragosa Mark | CHIEF FINANCIAL OFFICER | Other | 4,404 | 79.28 | 349,149 |
| Sep 1, 2026 | Ragosa Mark | CHIEF FINANCIAL OFFICER | Other | 3,069 | – | – |
| Sep 1, 2026 | Ragosa Mark | CHIEF FINANCIAL OFFICER | Other | 1,591 | – | – |
| Sep 1, 2026 | Ragosa Mark | CHIEF FINANCIAL OFFICER | Other | 1,750 | – | – |
| Sep 1, 2026 | Ragosa Mark | CHIEF FINANCIAL OFFICER | Other | 2,694 | – | – |
| Sep 1, 2026 | Paolini John F. | CHIEF MEDICAL OFFICER | Other | 4,029 | 79.28 | 319,419 |
| Sep 1, 2026 | Paolini John F. | CHIEF MEDICAL OFFICER | Other | 2,457 | – | – |
| Sep 1, 2026 | Paolini John F. | CHIEF MEDICAL OFFICER | Other | 1,750 | – | – |
| Sep 1, 2026 | Paolini John F. | CHIEF MEDICAL OFFICER | Other | 1,624 | – | – |
| Sep 1, 2026 | Paolini John F. | CHIEF MEDICAL OFFICER | Other | 2,497 | – | – |
| Sep 1, 2026 | Patel Sanj K | CHAIRMAN & CEO | Other | 15,144 | 79.28 | 1,200,616 |
| Sep 1, 2026 | Patel Sanj K | CHAIRMAN & CEO | Other | 8,609 | – | – |
| Sep 1, 2026 | Patel Sanj K | CHAIRMAN & CEO | Other | 6,237 | – | – |
| Sep 1, 2026 | Patel Sanj K | CHAIRMAN & CEO | Other | 6,481 | – | – |
| Sep 1, 2026 | Patel Sanj K | CHAIRMAN & CEO | Other | 9,991 | – | – |
| Sep 1, 2026 | Megna Michael R | CHIEF ACCOUNTING OFFICER | Other | 5,531 | 79.28 | 438,498 |
| Sep 1, 2026 | Megna Michael R | CHIEF ACCOUNTING OFFICER | Other | 2,644 | – | – |
| Sep 1, 2026 | Megna Michael R | CHIEF ACCOUNTING OFFICER | Other | 2,362 | – | – |
| Sep 1, 2026 | Megna Michael R | CHIEF ACCOUNTING OFFICER | Other | 2,558 | – | – |
| Sep 1, 2026 | Megna Michael R | CHIEF ACCOUNTING OFFICER | Other | 3,932 | – | – |
| Aug 19, 2026 | Quart Barry D | Director | Other | 2,600 | 0.00 | – |
| Jul 15, 2026 | Megna Michael R | CHIEF ACCOUNTING OFFICER | Other | 279 | 33.50 | 9,347 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 25, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.