Kiniksa Pharmaceuticals International KNSA Institutional Ownership

NASDAQ KNSA

$79.96 +2.87 (+3.72%)

As of: Sep 9, 2026 · 11:53 AM EDT

Institutions by Trading Activity

267 Institutions

Increased 158 59.2%

Unchanged 28 10.5%

Reduced 81 30.3%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

60.53%

▲+0.66 pp QoQ

Shares Held by Institutions

46.96Mn

of 77.58Mn outstanding

▲+7.60% QoQ

Shares Outstanding

77.58Mn

30.62Mn held outside 13F filers

Institutional Investors

267

filed 13F for Jun 2026

▲+39 vs prior quarter

Net Shares Added (QoQ)

+3.32Mn

accumulated since last quarter

Value of Holdings

$3.66Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Kiniksa Pharmaceuticals International, plc (NASDAQ:KNSA) has 267 institutional investors that have filed 13F reports for the period ending June 2026.

These investors held 60.5% of outstanding shares in June 2026, up from 59.9% in March 2026.
They increased total shares held in KNSA by 7.6% quarter over quarter, and investors in Kiniksa Pharmaceuticals International increased 42.78% from a year ago.
Of these 267 funds, 158 grew their exposure to Kiniksa Pharmaceuticals International, 81 cut back, and 28 maintained positions.
Altogether, these fund groups held 46.96Mn shares in KNSA by June 2026, up by 3.32Mn shares quarter on quarter, and up 7.78Mn shares year over year.
As of June 30, 2026, FMR LLC held the largest stake in Kiniksa Pharmaceuticals International with 6.97Mn shares, accounting for 8.99% of total shares outstanding.
Leading buyers of Kiniksa Pharmaceuticals International shares for the quarter ending June 2026 were BlackRock, Inc. (2.25Mn), Invesco Ltd. (745.15K), State Street Corp (627.56K), Jupiter Topco LLC (586.18K), GEODE CAPITAL MANAGEMENT, LLC (559.86K).
The largest sales of KNSA for the quarter ending June 2026 came from ACADIAN ASSET MANAGEMENT LLC (657.23K), MILLENNIUM MANAGEMENT LLC (471.06K), CITADEL ADVISORS LLC (433.08K), D. E. Shaw & Co., Inc. (389.5K), Qube Research & Technologies Ltd (382.77K).
According to Business Quant data, leading holders of KNSA for June 2026 are FMR LLC (6.97Mn), Rubric Capital Management LP (4.0Mn), BAKER BROS. ADVISORS LP (2.83Mn), BlackRock, Inc. (2.74Mn), TANG CAPITAL MANAGEMENT LLC (2.26Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (1.91Mn), VANGUARD CAPITAL MANAGEMENT LLC (1.36Mn), Morgan Stanley (1.01Mn), ARROWSTREET CAPITAL, LIMITED PARTNERSHIP (957.51K), Spruce Street Capital LP (918.07K).

Form 13F Holdings

267 Institutional Holders

Report period 30 Jun, 2026

Total shares held 46.96Mn

Of outstanding 60.53%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	FMR LLC	0000315066	6,971,361	8.99%	▲147,661	+2.16%	$445.82Mn
2	Rubric Capital Management LP	0001687509	3,999,800	5.16%	▲249,800	+6.66%	$255.79Mn
3	BAKER BROS. ADVISORS LP	0001263508	2,834,643	3.65%	▲8,397	+0.30%	$181.28Mn
4	BlackRock, Inc.	0002012383	2,739,615	3.53%	▲2,252,878	+462.85%	$175.20Mn
5	TANG CAPITAL MANAGEMENT LLC	0001232621	2,259,889	2.91%	0	0.00%	$144.52Mn
6	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	1,911,335	2.46%	▲145,067	+8.21%	$122.23Mn
7	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	1,360,840	1.75%	▲27,747	+2.08%	$87.03Mn
8	Morgan Stanley	0000895421	1,011,143	1.30%	▲13,357	+1.34%	$64.66Mn
9	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	0001164508	957,514	1.23%	▲64,848	+7.26%	$61.23Mn
10	Spruce Street Capital LP	0002050194	918,070	1.18%	▲157,007	+20.63%	$58.71Mn
11	DIMENSIONAL FUND ADVISORS LP	0000354204	874,786	1.13%	▲62,864	+7.74%	$55.94Mn
12	Invesco Ltd.	0000914208	772,806	1.00%	▲745,150	+2,694.35%	$49.42Mn
13	DRIEHAUS CAPITAL MANAGEMENT LLC	0000938206	718,199	0.93%	▲106,801	+17.47%	$45.93Mn
14	State Street Corp	0000093751	704,194	0.91%	▲627,561	+818.92%	$45.03Mn
15	ACADIAN ASSET MANAGEMENT LLC	0000916542	679,083	0.88%	▼657,230	-49.18%	$43.41K
16	Point72 Asset Management, L.P.	0001603466	659,493	0.85%	▲18,535	+2.89%	$42.17Mn
17	RICE HALL JAMES & ASSOCIATES, LLC	0001230765	624,928	0.81%	▲16,512	+2.71%	$39.96Mn
18	Pictet Asset Management Holding SA	0001993888	608,650	0.78%	▼14,638	-2.35%	$38.92Mn
19	GEODE CAPITAL MANAGEMENT, LLC	0001214717	604,180	0.78%	▲559,860	+1,263.22%	$38.63Mn
20	Jupiter Topco LLC	0002146052	586,177	0.76%	▲586,177	0.00%	$37.47Mn

Showing 1 to 20 of 267 holders