Kiniksa Pharmaceuticals International, plc (KNSA) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

80,035,400Shares Outstanding

50,154,962Shares held by institutions

$2,129,078,137Value of institutional holdings

62.67%Institutional ownership %

25.21%Shares Changed QoQ

216No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Kiniksa Pharmaceuticals International, plc (NASDAQ:KNSA) showed up in the 13F filings of 216 institutional investors as of December 2025.

These investors held 61.4% of outstanding shares in December 2025, up from 51.9% in September 2025.
Their total shares held in KNSA increased 22.92% quarter over quarter, and separately, investors owning Kiniksa Pharmaceuticals International increased 36.71% from a year ago.
Activity in KNSA broke down as 114 buyers, 71 sellers, and 31 unchanged among 216 total holders.
Altogether, these fund groups held 49.15Mn shares in KNSA by December 2025, up by 9.17Mn shares quarter on quarter, and up 7.93Mn shares year over year.
As of December 31, 2025, the biggest holder of Kiniksa Pharmaceuticals International is Rockefeller Capital Management L.P. at 7.33Mn shares, representing 9.16% of shares outstanding.
Leading buyers of Kiniksa Pharmaceuticals International shares for the quarter ending December 2025 were Rockefeller Capital Management L.P. (7.15Mn), Goldman Sachs Group Inc (1.11Mn), FMR LLC (843.11K), VICTORY CAPITAL MANAGEMENT INC (512.16K), Soleus Capital Management, L.P. (437.0K).
Top sellers of KNSA stock for the quarter ending December 2025 included Bank Of America Corp /De/ (761.6K), Rubric Capital Management LP (671.35K), Fairmount Funds Management LLC (453.15K), Jpmorgan Chase & Co (336.52K), BRAIDWELL LP (329.36K).
Business Quant data shows the 10 biggest positions in Kiniksa Pharmaceuticals International as of December 2025 are held by Rockefeller Capital Management L.P. (7.33Mn), Rubric Capital Management LP (3.33Mn), VANGUARD GROUP INC (3.11Mn), BAKER BROS. ADVISORS LP (2.83Mn), TANG CAPITAL MANAGEMENT LLC (2.26Mn), ACADIAN ASSET MANAGEMENT LLC (1.71Mn), Goldman Sachs Group Inc (1.66Mn), FMR LLC (1.64Mn), Morgan Stanley (1.36Mn), Fairmount Funds Management LLC (1.32Mn).

216 Institutional Holders

50,154,962 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
Rockefeller Capital Management L.P.	31 Dec, 2025	7,327,755	7,154,317	4,125.00%	$14,308,636.00
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
BAKER BROS. ADVISORS LP	31 Dec, 2025	2,826,246	1,577	0.06%	$116,582,648.00
TANG CAPITAL MANAGEMENT LLC	31 Dec, 2025	2,259,889	-68,720	-2.95%	$93,220,421.00
ACADIAN ASSET MANAGEMENT LLC	31 Dec, 2025	1,713,043	94,522	5.84%	$70,633.00
Goldman Sachs Group Inc	31 Dec, 2025	1,658,834	1,112,324	203.53%	$68,426,902.00
FMR LLC	31 Dec, 2025	1,642,863	843,108	105.42%	$67,768,109.00
Morgan Stanley	31 Dec, 2025	1,360,044	-2,879	-0.21%	$56,101,817.00
Fairmount Funds Management LLC	31 Dec, 2025	1,319,688	-453,151	-25.56%	$54,437,130.00
D. E. Shaw & Co., Inc.	31 Dec, 2025	1,241,621	107,435	9.47%	$51,216,867.00
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
MILLENNIUM MANAGEMENT LLC	31 Dec, 2025	825,285	-188,840	-18.62%	$34,043,006.00
Point72 Asset Management, L.P.	31 Dec, 2025	797,137	230,210	40.61%	$32,881,901.00
Pictet Asset Management Holding SA	31 Dec, 2025	787,520	-144,576	-15.51%	$32,485,200.00
Qube Research & Technologies Ltd	31 Dec, 2025	766,291	76,403	11.07%	$31,609,504.00
CITADEL ADVISORS LLC	31 Dec, 2025	742,118	427,562	135.93%	$30,612,368.00
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

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