Kiniksa Pharmaceuticals International, plc (KNSA) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

48,942,529Shares Outstanding

6,339,270Shares held by institutions

$287,612,680Value of institutional holdings

28.03%Institutional ownership %

7.07%Shares Changed QoQ

54No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

A total of 143 institutions have reported a stake in Kiniksa Pharmaceuticals International, plc (NASDAQ:KNSA) as of December 2025, according to recent 13F filings with the SEC.

Kiniksa Pharmaceuticals International saw its institutional ownership percentage fell to 28.1% in December 2025 from 51.9% in September 2025.
The company experienced a 7.58% quarterly change in institutional shares held, alongside a decrease of 9.49% in total owners annually.
A review of institutional activity for Kiniksa Pharmaceuticals International shows 69 of 143 filers increasing their positions, while 47 reduced their stake, and 27 remained unchanged.
The total number of shares held by institutions in Kiniksa Pharmaceuticals International increased to 22.44Mn as of December 2025, a net change of up by 1.58Mn shares quarter on quarter, and down 16.48Mn shares year over year.
As of December 31, 2025, Rubric Capital Management LP held Kiniksa Pharmaceuticals International's largest shareholding position with over 3.33Mn shares, representing 4.17% of total outstanding shares.
Among the most significant buyers of Kiniksa Pharmaceuticals International during December 2025 were VICTORY CAPITAL MANAGEMENT INC (512.16K), Soleus Capital Management, L.P. (437.00K), Spruce Street Capital LP (434.98K), SG Americas Securities, LLC (402.08K), GOLDMAN SACHS GROUP INC (282.91K).
Leading sellers of Kiniksa Pharmaceuticals International stock in December 2025 included Rubric Capital Management LP (671.35K), Walleye Capital LLC (269.79K), JANE STREET GROUP, LLC (200.96K), Pictet Asset Management Holding SA (144.58K), JPMORGAN CHASE & CO (144.06K).
The top 10 institutional holders of Kiniksa Pharmaceuticals International for the quarter ending December 2025 included Rubric Capital Management LP (3.33Mn), VANGUARD GROUP INC (3.11Mn), ACADIAN ASSET MANAGEMENT LLC (1.71Mn), MORGAN STANLEY (1.36Mn), ARROWSTREET CAPITAL, LIMITED PARTNERSHIP (1.07Mn), BNP PARIBAS FINANCIAL MARKETS (831.78K), GOLDMAN SACHS GROUP INC (829.42K), Pictet Asset Management Holding SA (787.52K), Connor, Clark & Lunn Investment Management Ltd. (739.33K), DIMENSIONAL FUND ADVISORS LP (683.50K).

143 Institutional Holders

6,339,270 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
Rubric Capital Management LP	31 Dec, 2025	3,328,653	-671,347	-16.78%	$137,306,936.00
VANGUARD GROUP INC	31 Dec, 2025	3,112,937	49,802	1.63%	$128,408,651.00
ACADIAN ASSET MANAGEMENT LLC	31 Dec, 2025	1,713,043	94,522	5.84%	$70,633.00
MORGAN STANLEY	31 Dec, 2025	1,360,044	-2,879	-0.21%	$56,101,817.00
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	31 Dec, 2025	1,068,216	-47	0.00%	$44,063,910.00
BNP PARIBAS FINANCIAL MARKETS	31 Dec, 2025	831,777	178,366	27.30%	$34,310,801.00
GOLDMAN SACHS GROUP INC	31 Dec, 2025	829,417	282,907	51.77%	$34,213,451.00
Pictet Asset Management Holding SA	31 Dec, 2025	787,520	-144,576	-15.51%	$32,485,200.00
Connor, Clark & Lunn Investment Management Ltd.	31 Dec, 2025	739,326	13,971	1.93%	$30,497,198.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	683,505	51,382	8.13%	$28,193,698.00
DEUTSCHE BANK AG\	31 Dec, 2025	630,291	96,916	18.17%	$25,999,504.00
Soleus Capital Management, L.P.	31 Dec, 2025	587,000	437,000	291.33%	$24,213,750.00
SG Americas Securities, LLC	31 Dec, 2025	541,396	402,078	288.60%	$22,333.00
VICTORY CAPITAL MANAGEMENT INC	31 Dec, 2025	512,163	512,163	0.00%	$21,126,724.00
BlackRock, Inc.	31 Dec, 2025	446,603	-11,044	-2.41%	$18,422,376.00
Spruce Street Capital LP	31 Dec, 2025	434,982	434,982	0.00%	$17,943,008.00
MASSACHUSETTS FINANCIAL SERVICES CO /MA/	31 Dec, 2025	425,232	-33,072	-7.22%	$17,540,820.00
Aberdeen Group plc	31 Dec, 2025	400,598	241,876	152.39%	$16,524,668.00
JANE STREET GROUP, LLC	31 Dec, 2025	267,530	-200,958	-42.90%	$11,035,612.00
Fisher Asset Management, LLC	31 Dec, 2025	267,274	-15,014	-5.32%	$11,025,051.00

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