Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in KNSA held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | FMR LLC | 6.8M | $328.6M | +315.4% | 9.196% | 0.02% |
| 2 | Rubric Capital Management LP | 3.8M | $180.6M | +12.7% | 5.054% | 2.21% |
| 3 | BAKER BROS. ADVISORS LP | 2.8M | $136.1M | 0.0% | 3.809% | 0.78% |
| 4 | TANG CAPITAL MANAGEMENT LLC | 2.3M | $108.8M | 0.0% | 3.046% | 5.53% |
| 5 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.8M | $85.0M | — | 2.380% | 0.00% |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 1.3M | $64.2M | — | 1.796% | 0.00% |
| 7 | MORGAN STANLEY | 998K | $48.0M | -26.6% | 1.345% | 0.00% |
| 8 | D. E. Shaw & Co., Inc. | 959K | $46.2M | -22.7% | 1.293% | 0.04% |
| 9 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 893K | $43.0M | -16.4% | 1.203% | 0.02% |
| 10 | DIMENSIONAL FUND ADVISORS LP | 812K | $39.1M | +18.8% | 1.094% | 0.01% |
| 11 | Spruce Street Capital LP | 761K | $36.6M | +75.0% | 1.026% | 8.81% |
| 12 | BANK OF AMERICA CORP /DE/ | 736K | $35.4M | +220.9% | 0.992% | 0.00% |
| 13 | Qube Research & Technologies Ltd | 687K | $33.1M | -10.4% | 0.926% | 0.04% |
| 14 | Connor, Clark & Lunn Investment Management Ltd. | 650K | $31.3M | -12.1% | 0.876% | 0.07% |
| 15 | BNP PARIBAS ARBITRAGE, SA | 648K | $31.2M | -22.1% | 0.873% | 0.02% |
| 16 | Point72 Asset Management, L.P. | 641K | $30.9M | -19.6% | 0.864% | 0.04% |
| 17 | Pictet Asset Management Holding SA | 623K | $30.0M | -20.8% | 0.840% | 0.03% |
| 18 | DRIEHAUS CAPITAL MANAGEMENT LLC | 611K | $29.4M | -3.4% | 0.824% | 0.22% |
| 19 | RICE HALL JAMES & ASSOCIATES, LLC | 608K | $29.3M | +2.0% | 0.820% | 1.63% |
| 20 | MILLENNIUM MANAGEMENT LLC | 564K | $27.2M | -31.6% | 0.761% | 0.02% |
| 21 | DEUTSCHE BANK AG\ | 524K | $25.2M | -16.9% | 0.706% | 0.01% |
| 22 | Soleus Capital Management, L.P. | 521K | $25.1M | -11.2% | 0.703% | 1.02% |
| 23 | ALLIANCEBERNSTEIN L.P. | 599K | $24.7M | +82.4% | 0.807% | 0.01% |
| 24 | VICTORY CAPITAL MANAGEMENT INC | 507K | $24.4M | -1.1% | 0.683% | 0.02% |
| 25 | BALYASNY ASSET MANAGEMENT LLC | 500K | $24.1M | — | 0.673% | 0.08% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in KNSA — a direct measure of their conviction.
Filings activity in KNSA during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 223 | +0.9% | 53.83% | +10.39 pp | $2.07B | +24% |
| Q4 2025 | 221 | +12% | 43.44% | +4.73 pp | $1.67B | +12% |
| Q3 2025 | 197 | +5.9% | 38.71% | +11.53 pp | $1.49B | +42% |
| Q2 2025 | 186 | +6.3% | 27.18% | +5.15 pp | $1.05B | +23% |
| Q1 2025 | 175 | +12% | 22.03% | +2.64 pp | $848M | +14% |
| Q4 2024 | 156 | 9.8% | 19.39% | 5.73 pp | $747M | 23% |
| Q3 2024 | 173 | +34% | 25.12% | +8.30 pp | $967M | +49% |
| Q2 2024 | 129 | — | 16.82% | — | $648M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying KNSA stock.
Based on Q1 2026 13F filings, institutional ownership of Kiniksa Pharmaceuticals, Ltd. stands at 53.8%, held across 223 reporting institutions.
FMR LLC is the largest reported institutional holder of KNSA, with approximately 6,823,700 shares worth $0.33B as of Q1 2026.
Yes — 2 widely-followed marquee investors appear among the top 25 institutional holders of KNSA, including Point72 Asset Management, L.P., MILLENNIUM MANAGEMENT LLC.
Our composite Smart Money Score for KNSA is 65 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
41 institutions opened new positions in KNSA during Q1 2026, while 39 fully exited. 133 added to existing positions and 47 trimmed.
KNSA institutional ownership rose by 10.39 percentage points quarter-over-quarter, with a net change of +2 holders.
The top 10 institutions account for 52.1% of all reported 13F value in KNSA, and the top 25 account for 73.2%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Kiniksa Pharmaceuticals, Ltd. (KNSA) Institutional Ownership