Kiniksa Pharmaceuticals (KNSA)
Markets ARCALYST for recurrent pericarditis while advancing a cardiovascular-focused clinical pipeline.
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Breakdown13F · 13D/G · Form 4
| Institutions276 holders · as of Jun 30, 2026 · largest filers plus last quarter's tail | ≈ 149.84% | 233.82M shares | |
| Insiders12 holders · as of Aug 21, 2026 | 0.75% | 1.17M shares | |
| Adds to | 150.59% |
156.05M company shares as of Sep 3, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing
Two share counts disagree (156.05M in the company's Sep 3, 2026 report, 76.21M elsewhere); stakes use the report.
This quarter's institutional total failed a plausibility check; shown: the largest filers plus last quarter's remainder.
These groups come from separate filings that can overlap, so they add to 150.59%; nothing is left for Other.
This company has 5 share classes; every stake here is a share of the whole company.
Institutions13F, as of Jun 30, 2026
276 holders · 46.76M shares · 73 new positions · 161 increased · 81 reduced · 32 closed
| Holder | Shares | % of company | Chg q/q | Filed |
|---|---|---|---|---|
| FMR LLC | 6.97M | 4.47% | +147.7K | Aug 13, 2026 |
| Rubric Capital Management LP | 4.00M | 2.56% | +249.8K | Aug 14, 2026 |
| Baker Bros. Advisors LP | 2.83M | 1.82% | +8.4K | Aug 14, 2026 |
| BlackRock, Inc. | 2.74M | 1.76% | +2.25M | Aug 7, 2026 |
| Tang Capital Management LLC | 2.26M | 1.45% | 0 | Aug 14, 2026 |
| Vanguard Portfolio Management LLC | 1.91M | 1.22% | +145.1K | Aug 13, 2026 |
| Vanguard Capital Management LLC | 1.36M | 0.87% | +27.7K | Aug 13, 2026 |
| Morgan Stanley | 1.01M | 0.65% | +13.4K | Aug 13, 2026 |
Ownership statements13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| FMR LLC | 14.80% | 6.79M | 13G | May 6, 2026 ↗ |
| Rubric Capital Management LP | 7.37% | 3.33M | 13G | Feb 13, 2026 ↗ |
| Julian C. Bakerincl. Felix J. Baker, FBB3 LLC +2 more | 7.00% | 3.25M | 13D | May 26, 2026 ↗ |
| BlackRock, Inc. | 5.50% | 2.53M | 13G | Jul 29, 2026 ↗ |
| Tang Capital Management, LLC | 5.20% | 2.18M | 13G | Apr 4, 2025 ↗ |
Insider tradesForm 4
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Jul 29, 2026 | G. Bradley Coledirector | Sale | 3,673 | $81.43 | 11,672 |
| May 1, 2026 | John F. Paoliniofficer: CHIEF MEDICAL OFFICER | Sale · 2 lots | 58,424 | $53.71 | 65,623 |
| May 1, 2026 | Sanj K. Pateldirector, officer: CHAIRMAN & CEO | Sale | 48,565 | $54.02 | 0 |
| Apr 30, 2026 | Sanj K. Pateldirector, officer: CHAIRMAN & CEO | Sale | 2,141 | $54.01 | 0 |
| Apr 28, 2026 | Sanj K. Pateldirector, officer: CHAIRMAN & CEO | Sale · 4 lots | 483,654 | $51.86 | 0 |
| Apr 28, 2026 | Barry D. Quartdirector | Sale | 13,099 | $50.10 | 12,546 |
| Apr 9, 2026 | Ross Moatofficer: CHIEF OPERATING OFFICER | Sale | 1,703 | $46.69 | 12,029 |
| Apr 9, 2026 | Michael R. Megnaofficer: CHIEF ACCOUNTING OFFICER | Sale | 6,625 | $46.69 | 27,418 |
| Apr 6, 2026 | Barry D. Quartdirector | Sale | 6,901 | $50.00 | 12,546 |
| Apr 6, 2026 | Ross Moatofficer: CHIEF OPERATING OFFICER | Sale | 2,367 | $48.58 | 12,029 |
CongressHouse and Senate disclosures
Not reported.