KNSA · Kiniksa Pharmaceuticals International, plc
Market Cap
$12.18B
Shares
156.05M
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Holders: 268
Total Value: $3,021,981,564
Total Shares: 47,255,383
Showing 1–100
of 274 holdings by value
· page 1 of 3
Institutional Ownership Trend
9 quarters
Superinvestors Holding KNSA
All superinvestors →Holder Concentration
Across 268 13F filers · Δ vs Mar 31, 2026Top Holder
14.8%
+0.1 pts
Top 5
39.8%
+2.3 pts
Top 10
52.8%
+3.2 pts
HHI
461
Broadly held+27
Quarterly Activity
vs Mar 31, 2026
New
72
Increased
86
Decreased
81
Sold Out
34
Unchanged
29
Holder count:
+38
Institutional value:
+35.0%
Shares held:
+1.6%
Top Buyers
vs Mar 31, 2026| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Mega BlackRock, Inc. | +2,252,878 | 2,739,615 | |
| Mega Invesco Ltd. | +745,150 | 772,806 | |
| Mega STATE STREET CORP | +627,561 | 704,194 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC | +559,860 | 604,180 | |
| Mega NORTHERN TRUST CORP | +278,322 | 315,246 |
Top Sellers
vs Mar 31, 2026| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Large Caption Management, LLC | −674,600 | 324,800 | |
| Large ACADIAN ASSET MANAGEMENT LLC | −657,230 | 679,083 | |
| Mega MILLENNIUM MANAGEMENT LLC | −471,056 | 93,364 | |
| Mega CITADEL ADVISORS LLC | −438,185 | 61,465 | |
| Mega D. E. Shaw & Co., Inc. | −389,501 | 569,756 |
Top New Positions
vs Mar 31, 2026| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Mega Jupiter Topco LLC | 586,177 | $37,486,019 | |
| Small STEMPOINT CAPITAL LP | 209,234 | $13,380,514 | |
| Mid SEGALL BRYANT & HAMILL, LLC | 71,901 | $4,598,068 | |
| Large RENAISSANCE TECHNOLOGIES LLC | 68,077 | $4,353,524 | |
| Large TRUIST FINANCIAL CORP | 51,671 | $3,304,360 |
Top Sold-Out Positions
vs Mar 31, 2026| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Mega JANUS HENDERSON GROUP PLC | 481,023 | $23,161,256 | |
| Large MARSHALL WACE, LLP | 305,371 | $14,703,613 | |
| Small Parkman Healthcare Partners LLC | 259,184 | $12,479,709 | |
| Large VOLORIDGE INVESTMENT MANAGEMENT, LLC | 134,516 | $6,476,945 | |
| Small Legato Capital Management LLC | 70,805 | $3,409,260 |
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega FMR LLC | $445,818,534 | 14.75% | 6,971,361 | Shares | 2026-08-13 | |
| Large Rubric Capital Management LP | $255,787,210 | 8.46% | 3,999,800 | Shares | 2026-08-14 | |
| Large BAKER BROS. ADVISORS LP | $181,275,419 | 6.00% | 2,834,643 | Shares | 2026-08-14 | |
| Mega BlackRock, Inc. | $175,198,373 | 5.80% | 2,739,615 | Shares | 2026-08-07 | |
| Mid TANG CAPITAL MANAGEMENT LLC | $144,519,901 | 4.78% | 2,259,889 | Shares | 2026-08-14 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC | $122,229,873 | 4.04% | 1,911,335 | Shares | 2026-08-13 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $87,025,718 | 2.88% | 1,360,840 | Shares | 2026-08-13 | |
| Mega MORGAN STANLEY | $64,662,591 | 2.14% | 1,011,143 | Shares | 2026-08-13 | |
| Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $61,233,020 | 2.03% | 957,514 | Shares | 2026-08-13 | |
| Small Spruce Street Capital LP | $58,710,576 | 1.94% | 918,070 | Shares | 2026-08-13 | |
| Mega DIMENSIONAL FUND ADVISORS LP | $55,942,563 | 1.85% | 874,786 | Shares | 2026-08-11 | |
| Mega Invesco Ltd. | $49,420,939 | 1.64% | 772,806 | Shares | 2026-08-14 | |
| Large Driehaus Capital Management LLC | $45,928,826 | 1.52% | 718,199 | Shares | 2026-08-14 | |
| Mega STATE STREET CORP | $45,033,206 | 1.49% | 704,194 | Shares | 2026-08-07 | |
| Large ACADIAN ASSET MANAGEMENT LLC | $43,427,357 | 1.44% | 679,083 | Shares | 2026-08-13 | |
| Large Point72 Asset Management, L.P. | $42,174,577 | 1.40% | 659,493 | Shares | 2026-08-14 | |
| Mid RICE HALL JAMES & ASSOCIATES, LLC | $39,964,145 | 1.32% | 624,928 | Shares | 2026-08-07 | |
| Mega Pictet Asset Management Holding SA | $38,923,167 | 1.29% | 608,650 | Shares | 2026-07-30 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC | $38,637,310 | 1.28% | 604,180 | Shares | 2026-08-12 | |
| Mega Jupiter Topco LLC | $37,486,019 | 1.24% | 586,177 | Shares | 2026-08-14 | |
| Large Connor, Clark & Lunn Investment Management Ltd. | $36,617,642 | 1.21% | 572,598 | Shares | 2026-08-13 | |
| Mega D. E. Shaw & Co., Inc. | $36,435,896 | 1.21% | 569,756 | Shares | 2026-08-14 | |
| Mega TWO SIGMA INVESTMENTS, LP | $35,906,646 | 1.19% | 561,480 | Shares | 2026-08-14 | |
| Mega ALLIANCEBERNSTEIN L.P. | $35,565,856 | 1.18% | 556,151 | Shares | 2026-08-14 | |
| Mega VICTORY CAPITAL MANAGEMENT INC | $32,285,348 | 1.07% | 504,853 | Shares | 2026-08-07 | |
| Mega SG Americas Securities, LLC Broker-Dealer | $32,230,863 | 1.07% | 504,001 | Shares | 2026-08-07 | |
| Mega BNP PARIBAS ARBITRAGE, SA | $27,958,428 | 0.93% | 437,192 | Shares | 2026-08-13 | |
| Mega MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | $27,583,169 | 0.91% | 431,324 | Shares | 2026-08-03 | |
| Mid ORBIMED ADVISORS LLC | $26,897,370 | 0.89% | 420,600 | Shares | 2026-08-14 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $26,437,630 | 0.87% | 413,411 | Shares | 2026-08-14 | |
| Mid OBERWEIS ASSET MANAGEMENT INC/ | $26,413,524 | 0.87% | 413,034 | Shares | 2026-08-14 | |
| Large Aberdeen Group plc | $25,802,865 | 0.85% | 403,485 | Shares | 2026-07-31 | |
| Mega Fisher Asset Management, LLC | $25,469,110 | 0.84% | 398,266 | Shares | 2026-08-04 | |
| Mega DEUTSCHE BANK AG\ Bank | $24,787,402 | 0.82% | 387,606 | Shares | 2026-08-07 | |
| Mega AQR CAPITAL MANAGEMENT LLC | $23,983,741 | 0.79% | 375,039 | Shares | 2026-08-14 | |
| Mid Penn Capital Management Company, LLC | $23,540,890 | 0.78% | 368,114 | Shares | 2026-07-30 | |
| Mega NORTHERN TRUST CORP Bank | $20,159,980 | 0.67% | 315,246 | Shares | 2026-08-13 | |
| Large Balyasny Asset Management L.P. | $19,804,163 | 0.66% | 309,682 | Shares | 2026-08-14 | |
| Mega Qube Research & Technologies Ltd | $19,445,916 | 0.64% | 304,080 | Shares | 2026-08-14 | |
| Large Caption Management, LLC | $19,172,210 | 0.63% | 299,800 | Put | 2026-08-14 | |
| Large NEW YORK STATE COMMON RETIREMENT FUND Pension | $17,431,427 | 0.58% | 272,579 | Shares | 2026-07-29 | |
| Large NOMURA HOLDINGS INC | $17,312,799 | 0.57% | 270,724 | Shares | 2026-08-14 | |
| Mid Soleus Capital Management, L.P. | $15,754,274 | 0.52% | 246,353 | Shares | 2026-08-11 | |
| Small ESSEX INVESTMENT MANAGEMENT CO LLC | $15,436,378 | 0.51% | 241,382 | Shares | 2026-08-06 | |
| Mega Bank of New York Mellon Corp Bank | $14,870,353 | 0.49% | 232,531 | Shares | 2026-08-06 | |
| Mid ArrowMark Colorado Holdings LLC | $13,784,166 | 0.46% | 215,546 | Shares | 2026-08-13 | |
| Small STEMPOINT CAPITAL LP | $13,380,514 | 0.44% | 209,234 | Shares | 2026-08-14 | |
| Mega GOLDMAN SACHS GROUP INC | $12,237,727 | 0.40% | 191,364 | Shares | 2026-08-14 | |
| Large SEI INVESTMENTS CO | $12,058,731 | 0.40% | 188,565 | Shares | 2026-08-14 | |
| Mid BRAIDWELL LP | $11,755,416 | 0.39% | 183,822 | Shares | 2026-08-14 | |
| Mid CASTLEARK MANAGEMENT LLC | $11,129,346 | 0.37% | 174,032 | Shares | 2026-08-14 | |
| Large Rockefeller Capital Management L.P. | $11,091,360 | 0.37% | 173,438 | Shares | 2026-08-13 | |
| Mid PEREGRINE CAPITAL MANAGEMENT LLC | $10,325,622 | 0.34% | 161,464 | Shares | 2026-07-17 | |
| Mid Granahan Investment Management, LLC | $9,702,813 | 0.32% | 151,725 | Shares | 2026-08-14 | |
| Large Squarepoint Ops LLC | $8,956,773 | 0.30% | 140,059 | Shares | 2026-08-14 | |
| Mega Nuveen, LLC | $8,137,955 | 0.27% | 127,255 | Shares | 2026-08-11 | |
| Large SILVERCREST ASSET MANAGEMENT GROUP LLC | $6,993,508 | 0.23% | 109,359 | Shares | 2026-08-14 | |
| Mega NORDEA INVESTMENT MANAGEMENT AB | $6,852,689 | 0.23% | 107,157 | Shares | 2026-08-05 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $6,495,721 | 0.21% | 101,575 | Shares | 2026-08-14 | |
| Large Universal- Beteiligungs- und Servicegesellschaft mbH | $6,385,535 | 0.21% | 99,852 | Shares | 2026-08-06 | |
| Small GLOBEFLEX CAPITAL L P | $5,972,674 | 0.20% | 93,396 | Shares | 2026-08-12 | |
| Mega MILLENNIUM MANAGEMENT LLC | $5,970,627 | 0.20% | 93,364 | Shares | 2026-08-14 | |
| Small Lisanti Capital Growth, LLC | $5,583,154 | 0.18% | 87,305 | Shares | 2026-08-10 | |
| Mega Swiss National Bank Bank | $4,713,115 | 0.16% | 73,700 | Shares | 2026-08-11 | |
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $4,626,846 | 0.15% | 72,351 | Shares | 2026-08-13 | |
| Mid SEGALL BRYANT & HAMILL, LLC | $4,598,068 | 0.15% | 71,901 | Shares | 2026-08-12 | |
| Large RENAISSANCE TECHNOLOGIES LLC | $4,353,524 | 0.14% | 68,077 | Shares | 2026-08-13 | |
| Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE Insurance | $4,330,374 | 0.14% | 67,715 | Shares | 2026-08-14 | |
| Large LAZARD ASSET MANAGEMENT LLC | $4,303,259 | 0.14% | 67,291 | Shares | 2026-08-14 | |
| Large Allspring Global Investments Holdings, LLC | $4,162,953 | 0.14% | 65,097 | Shares | 2026-08-13 | |
| Mega RHUMBLINE ADVISERS | $3,742,929 | 0.12% | 58,529 | Shares | 2026-08-12 | |
| Mega AMERICAN CENTURY COMPANIES INC | $3,607,291 | 0.12% | 56,408 | Shares | 2026-08-12 | |
| Mid Informed Momentum Co LLC | $3,566,171 | 0.12% | 55,765 | Shares | 2026-08-13 | |
| Mid Linden Thomas Advisory Services, LLC | $3,504,651 | 0.12% | 54,803 | Shares | 2026-07-16 | |
| Large Trexquant Investment LP | $3,421,772 | 0.11% | 53,507 | Shares | 2026-08-14 | |
| Large HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Pension | $3,370,165 | 0.11% | 52,700 | Shares | 2026-08-13 | |
| Large TRUIST FINANCIAL CORP | $3,304,360 | 0.11% | 51,671 | Shares | 2026-07-28 | |
| Large LOS ANGELES CAPITAL MANAGEMENT LLC | $3,247,764 | 0.11% | 50,786 | Shares | 2026-08-13 | |
| Mega JANE STREET GROUP, LLC | $3,127,155 | 0.10% | 48,900 | Call | 2026-08-14 | |
| Mega WELLS FARGO & COMPANY/MN | $3,112,892 | 0.10% | 48,677 | Shares | 2026-08-14 | |
| Mega UBS Group AG | $2,888,876 | 0.10% | 45,174 | Shares | 2026-08-13 | |
| Mega CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension | $2,721,648 | 0.09% | 42,559 | Shares | 2026-08-24 | |
| Mega CITADEL ADVISORS LLC | $2,664,476 | 0.09% | 41,665 | Shares | 2026-08-14 | |
| Mid Aquatic Capital Management LLC | $2,655,715 | 0.09% | 41,528 | Shares | 2026-08-14 | |
| Mid MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC | $2,654,180 | 0.09% | 41,504 | Shares | 2026-08-11 | |
| Mid PDT Partners, LLC | $2,594,259 | 0.09% | 40,567 | Shares | 2026-08-14 | |
| Large Man Group plc | $2,591,509 | 0.09% | 40,524 | Shares | 2026-08-14 | |
| Mega CITIGROUP INC | $2,590,805 | 0.09% | 40,513 | Shares | 2026-08-03 | |
| Large Cerity Partners LLC | $2,589,207 | 0.09% | 40,488 | Shares | 2026-08-14 | |
| Mega RAYMOND JAMES FINANCIAL INC | $2,439,563 | 0.08% | 38,148 | Shares | 2026-08-14 | |
| Mega Legal & General Group Plc | $2,273,357 | 0.08% | 35,549 | Shares | 2026-08-14 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ | $2,227,378 | 0.07% | 34,830 | Shares | 2026-08-14 | |
| Small Timothy G. Youngquist 2020 Irrevocable Trust | $2,196,106 | 0.07% | 34,341 | Shares | 2026-08-07 | |
| Large ExodusPoint Capital Management, LP | $2,111,437 | 0.07% | 33,017 | Shares | 2026-08-14 | |
| Mid Voleon Capital Management LP | $2,097,943 | 0.07% | 32,806 | Shares | 2026-08-14 | |
| Mega AMERIPRISE FINANCIAL INC | $2,082,915 | 0.07% | 32,571 | Shares | 2026-08-14 | |
| Mega LPL Financial LLC | $2,073,259 | 0.07% | 32,420 | Shares | 2026-08-07 | |
| Mega JPMORGAN CHASE & CO | $2,017,811 | 0.07% | 31,553 | Shares | 2026-08-12 | |
| Small Financial Enhancement Group LLC | $2,007,454 | 0.07% | 31,391 | Shares | 2026-07-07 | |
| Large Baird Financial Group, Inc. | $1,963,776 | 0.06% | 30,708 | Shares | 2026-08-12 |
Key facts
CIK
1730430
CUSIP
G52694109
13F (30d)
215 filings
213 filers
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