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Kiniksa Pharmaceuticals Ownership | Who Owns Kiniksa Pharmaceuticals?

OverviewForecastRevenueFinancialsChartTranscripts

Kiniksa Pharmaceuticals Ownership Summary

Kiniksa Pharmaceuticals is owned by 8.59% institutional investors, 3.57% insiders, and 87.84% retail investors. Rubric capital management lp is the largest institutional shareholder, holding 5.45% of KNSA shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 1.72% of its assets in Kiniksa Pharmaceuticals shares.

KNSA Ownership Benchmark

TypeName% Inst% Insiders% Retail
StockKiniksa Pharmaceuticals8.59%3.57%87.84%
SectorHealthcare Stocks 42.53%10.81%46.67%
IndustryBiotech Stocks 45.24%10.75%44.01%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

HolderShares% HoldingValue
Rubric capital management lp4.00M5.45%$155.32M
Vanguard group3.06M4.17%$118.94M
Baker bros. advisors lp2.82M3.85%$109.68M
Tang capital management2.33M3.17%$90.42M
Fairmount funds management1.77M2.41%$68.84M
Acadian asset management1.62M2.20%$62.82M
Morgan stanley1.36M1.86%$52.92M
Arrowstreet capital, limited partnership1.07M1.45%$41.48M
Pictet asset management sa984.60K1.34%$27.24M
Fmr799.75K1.09%$31.05M

Top Institutional Shareholders by % of Total Assets

HolderShares% AssetsValue
Fairmount funds management1.77M6.19%$68.84M
Lion point capital, lp23.40K5.16%$908.62K
Tang capital management2.33M3.48%$90.42M
Parkman healthcare partners671.59K2.72%$26.08M
Rubric capital management lp4.00M1.75%$155.32M
Essex investment management247.30K1.47%$9.60M
Rice hall james & associates577.82K1.22%$22.44M
Baker bros. advisors lp2.82M0.79%$109.68M
Braidwell lp643.18K0.74%$24.97M
Globeflex capital l p93.40K0.56%$3.63M

Top Buyers

HolderShares% AssetsChange
Massachusetts financial services co /ma/458.30K0.01%394.07K
Acadian asset management1.62M0.11%350.53K
Arrowstreet capital, limited partnership1.07M0.03%332.85K
Two sigma investments, lp461.77K0.03%298.03K
Morgan stanley1.36M0.00%296.64K

Top Sellers

HolderShares% AssetsChange
Blackrock---4.19M
Hhlr advisors---1.58M
Nuveen asset management---831.10K
Braidwell lp643.18K0.74%-459.40K
Squarepoint ops85.20K0.00%-331.37K

New Positions

HolderShares% AssetsChangeValue
Rockefeller capital management173.44K0.01%173.44K$6.73M
Abrdn158.72K0.01%158.72K$6.16M
Castleark management158.63K0.17%158.63K$6.16M
Silvercrest asset management group126.26K0.03%126.26K$4.90M
Voleon capital management lp89.17K0.08%89.17K$3.46M

Sold Out

HolderChange
Twin peaks wealth advisors-1.00
Riggs asset managment-30.00
Nelson, van denburg & campbell wealth management group-34.00
Sterling capital management-44.00
Van hulzen asset management-50.00

Institutional Ownership Trends

DateHoldingsChange %SharesChange %OwnershipChange %Increased PositionChange %Decreased PositionChange %
Sep 30, 202571-62.83%6,310,956-84.11%80.29%41-63.06%20-67.74%
Jun 30, 20251906.74%39,714,3312.46%541.90%11015.79%6212.73%
Mar 31, 20251789.20%39,838,0562.13%541.84%9521.79%55-5.17%
Dec 31, 20241-50.00%98,093-23.09%-432.56%1---
Sep 30, 20242-60.00%127,54390.97%-1987.95%1-66.67%--

Top Mutual Funds Shareholders

HolderShares% HoldingChange
Vanguard US Total Market Shares ETF1.25M1.72%-
Vanguard Total Stock Mkt Idx Inv1.19M1.61%-26.43K
Pictet Biotech965.39K1.36%965.39K
iShares Russell 2000 ETF971.72K1.33%-
Vanguard Small Cap Index924.53K1.25%-6.09K
Vanguard Institutional Extnd Mkt Idx Tr567.21K0.80%795.00
Pictet-Biotech P USD540.98K0.73%-81.03K
Vanguard Small Cap Growth Index Inv524.53K0.71%-196.00
Fidelity Small Cap Growth490.30K0.66%-
Pictet-Global Megatrend Sel I USD417.83K0.56%6.39K

Recent Insider Transactions

DateNameRoleActivityValue
Nov 17, 2025Tessari Eben CHIEF OPERATING OFFICERSell$25.85K
Nov 17, 2025Tessari Eben CHIEF OPERATING OFFICERSell$488.37K
Nov 12, 2025Ragosa Mark CHIEF FINANCIAL OFFICERSell$814.71K
Oct 31, 2025Paolini John F. CHIEF MEDICAL OFFICERSell$3.07M
Oct 28, 2025Ragosa Mark CHIEF FINANCIAL OFFICERSell$4.10K

Insider Transactions Trends

DateBuySell
2025 Q4-13
2025 Q3-19
2025 Q2-29
2025 Q1-8
2024 Q4-9

KNSA Ownership FAQ

Who Owns Kiniksa Pharmaceuticals?

Kiniksa Pharmaceuticals shareholders are primarily institutional investors at 8.59%, followed by 3.57% insiders and 87.84% retail investors. The average institutional ownership in Kiniksa Pharmaceuticals's industry, Biotech Stocks , is 45.24%, which Kiniksa Pharmaceuticals falls below.

Who owns the most shares of Kiniksa Pharmaceuticals?

Kiniksa Pharmaceuticals’s largest shareholders are Rubric capital management lp (4M shares, 5.45%), Vanguard group (3.06M shares, 4.17%), and Baker bros. advisors lp (2.82M shares, 3.85%). Together, they hold 13.46% of Kiniksa Pharmaceuticals’s total shares outstanding.

Does Blackrock own Kiniksa Pharmaceuticals?

BlackRock is not among the top 10 institutional shareholders of Kiniksa Pharmaceuticals.

Who is Kiniksa Pharmaceuticals’s biggest shareholder by percentage of total assets invested?

Fairmount funds management is Kiniksa Pharmaceuticals’s biggest shareholder by percentage of total assets invested, with 6.19% of its assets in 1.77M Kiniksa Pharmaceuticals shares, valued at 68.84M$.

Who is the top mutual fund holder of Kiniksa Pharmaceuticals shares?

Vanguard US Total Market Shares ETF is the top mutual fund holder of Kiniksa Pharmaceuticals shares, with 1.72% of its total shares outstanding invested in 1.25M Kiniksa Pharmaceuticals shares.

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