Kiniksa Pharmaceuticals International Ownership | Who Owns Kiniksa Pharmaceuticals International?

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Kiniksa Pharmaceuticals International Ownership Summary

Kiniksa Pharmaceuticals International is owned by 61.45% institutional investors, 3.49% insiders, and 35.06% retail investors. Fmr is the largest institutional shareholder, holding 9.11% of KNSA shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 1.72% of its assets in Kiniksa Pharmaceuticals International shares.

KNSA Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Kiniksa Pharmaceuticals International	61.45%	3.49%	35.06%
Sector	Healthcare Stocks	50.44%	12.38%	37.18%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Fmr	6.97M	9.11%	$445.82M
Rubric capital management lp	4.00M	5.23%	$255.79M
Vanguard group	3.11M	4.23%	$128.41M
Baker bros. advisors lp	2.83M	3.70%	$181.28M
Blackrock funding, inc. /de	2.74M	3.58%	$175.20M
Tang capital management	2.26M	2.95%	$144.52M
Vanguard capital management	1.36M	1.78%	$87.03M
Morgan stanley	1.01M	1.32%	$64.66M
Arrowstreet capital, limited partnership	957.51K	1.25%	$61.23M
Dimensional fund advisors lp	874.79K	1.14%	$55.94M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Tang capital management	2.26M	6.56%	$144.52M
Lion point capital, lp	23.40K	5.16%	$908.62K
Rubric capital management lp	4.00M	2.35%	$255.79M
Stempoint capital lp	209.23K	2.30%	$13.38M
Essex investment management	241.38K	2.02%	$15.44M
Rice hall james & associates	624.93K	1.95%	$39.96M
Penn capital management company	368.11K	1.49%	$23.57M
Lisanti capital growth	87.31K	1.23%	$5.58M
Baker bros. advisors lp	2.83M	0.91%	$181.28M
Globeflex capital l p	93.40K	0.76%	$5.97M

Top Buyers

Holder	Shares	% Assets	Change
Blackrock funding, inc. /de	2.74M	0.00%	2.25M
Invesco	772.81K	0.00%	745.15K
State street	704.19K	0.00%	627.56K
Geode capital management	604.18K	0.00%	559.86K
Janus henderson group	481.02K	0.01%	327.60K

Top Sellers

Holder	Shares	% Assets	Change
Blackrock	-	-	-4.19M
Hhlr advisors	-	-	-1.58M
Fairmount funds management	-	-	-1.32M
Nuveen asset management	-	-	-831.10K
Acadian asset management	679.08K	0.05%	-657.23K

New Positions

Holder	Shares	% Assets	Change	Value
Stempoint capital lp	209.23K	2.30%	209.23K	$13.38M
Sixth street partners management company	101.58K	0.00%	101.58K	$6.50M
Segall bryant & hamill	71.90K	0.05%	71.90K	$4.60M
Renaissance	68.08K	0.01%	68.08K	$4.35M
Adage capital partners gp	59.00K	0.00%	59.00K	$2.29M

Sold Out

Holder	Change
Twin peaks wealth advisors	-1.00
Clearstead advisors	-2.00
Advisory services network	-8.00
Caitong asset management	-15.00
Optima capital	-18.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2026	274	17.09%	47,017,987	3.55%	61	1.64%	158	35.04%	82	-5.75%
Mar 31, 2026	144	-36.28%	15,964,705	-62.83%	21	0.63%	77	-35.29%	47	-32.86%
Dec 31, 2025	61	-70.67%	7,296,166	-82.12%	9	0.32%	27	-74.53%	19	-72.86%
Sep 30, 2025	71	-62.83%	6,310,956	-84.11%	8	0.29%	41	-63.06%	20	-67.74%
Jun 30, 2025	190	6.74%	39,714,331	2.46%	54	1.90%	110	15.79%	62	12.73%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard US Total Market Shares ETF	1.25M	1.72%	-
Vanguard Total Stock Mkt Idx Inv	1.32M	1.71%	21.86K
Vanguard Morn Total Stk Mkt Idx Investor	1.32M	1.69%	21.86K
iShares Russell 2000 ETF	1.07M	1.37%	-19.01K
Pictet Biotech	965.39K	1.36%	965.39K
Vanguard Small Cap Index	955.92K	1.24%	5.23K
Fidelity Select Health Care	905.57K	1.16%	60.66K
Strategic Advisers Fidelity US TtlStk	649.25K	0.83%	48.20K
Fidelity Select Biotechnology	637.60K	0.82%	-
Vanguard Institutional Extnd Mkt Idx Tr	567.21K	0.80%	795.00

Recent Insider Transactions

Date	Name	Role	Activity	Value
Jul 29, 2026	Cole G Bradley	-	Sell	$299.09K
May 01, 2026	Paolini John F.	CHIEF MEDICAL OFFICER	Sell	$2.00M
May 01, 2026	Paolini John F.	CHIEF MEDICAL OFFICER	Sell	$1.14M
May 01, 2026	Patel Sanj K	CHAIRMAN & CEO	Sell	$2.62M
Apr 28, 2026	Patel Sanj K	CHAIRMAN & CEO	Sell	$12.67M

Insider Transactions Trends

Date	Buy	Sell
2026 Q3	-	1
2026 Q2	-	14
2026 Q1	-	12
2025 Q4	-	17
2025 Q3	-	19

KNSA Ownership FAQ

Who owns the most shares of Kiniksa Pharmaceuticals International?

Kiniksa Pharmaceuticals International’s largest shareholders are Fmr (6.97M shares, 9.11%), Rubric capital management lp (4M shares, 5.23%), and Vanguard group (3.11M shares, 4.23%). Together, they hold 18.57% of Kiniksa Pharmaceuticals International’s total shares outstanding.

Does Blackrock own Kiniksa Pharmaceuticals International?

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

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

Tang capital management is Kiniksa Pharmaceuticals International’s biggest shareholder by percentage of total assets invested, with 6.56% of its assets in 2.26M Kiniksa Pharmaceuticals International shares, valued at 144.52M$.

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

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

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