Kiniksa Pharmaceuticals International KNSA Institutional Ownership

NASDAQ KNSA

$75.59 +0.98 (+1.31%)

As of: Oct 1, 2026 · 2:46 PM 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

97.33%

▼-1.09 pp QoQ

Shares Held by Institutions

46.96Mn

of 48.24Mn outstanding

▲+7.60% QoQ

Shares Outstanding

48.24Mn

1.29Mn 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

$3.50Bn

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 with active 13F positions as of June 2026.

Collectively, these holders controlled 97.3% of Kiniksa Pharmaceuticals International's outstanding shares in June 2026, down from 98.4% in March 2026.
Their total shares held in KNSA increased 7.6% from the prior quarter, while the number of investors in Kiniksa Pharmaceuticals International increased 42.78% year over year.
Activity in KNSA broke down as 158 buyers, 81 sellers, and 28 unchanged among 267 total holders.
Institutional investors collectively held 46.96Mn shares in Kiniksa Pharmaceuticals International as of June 2026, up by 3.32Mn shares quarter on quarter, and up 8.51Mn shares year over year.
FMR LLC holds the largest position in KNSA at 6.97Mn shares as of June 30, 2026, or 14.45% of shares outstanding.
Top purchasers of KNSA stock for the quarter ending June 2026 included 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 biggest sellers of Kiniksa Pharmaceuticals International for the quarter ending June 2026 included 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).
Business Quant data shows the 10 biggest positions in Kiniksa Pharmaceuticals International as of June 2026 are held by 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 97.33%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	FMR LLC	0000315066	6,971,361	14.45%	▲147,661	+2.16%	$445.82Mn
2	Rubric Capital Management LP	0001687509	3,999,800	8.29%	▲249,800	+6.66%	$255.79Mn
3	BAKER BROS. ADVISORS LP	0001263508	2,834,643	5.88%	▲8,397	+0.30%	$181.28Mn
4	BlackRock, Inc.	0002012383	2,739,615	5.68%	▲2,252,878	+462.85%	$175.20Mn
5	TANG CAPITAL MANAGEMENT LLC	0001232621	2,259,889	4.68%	0	0.00%	$144.52Mn
6	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	1,911,335	3.96%	▲145,067	+8.21%	$122.23Mn
7	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	1,360,840	2.82%	▲27,747	+2.08%	$87.03Mn
8	Morgan Stanley	0000895421	1,011,143	2.10%	▲13,357	+1.34%	$64.66Mn
9	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	0001164508	957,514	1.98%	▲64,848	+7.26%	$61.23Mn
10	Spruce Street Capital LP	0002050194	918,070	1.90%	▲157,007	+20.63%	$58.71Mn
11	DIMENSIONAL FUND ADVISORS LP	0000354204	874,786	1.81%	▲62,864	+7.74%	$55.94Mn
12	Invesco Ltd.	0000914208	772,806	1.60%	▲745,150	+2,694.35%	$49.42Mn
13	DRIEHAUS CAPITAL MANAGEMENT LLC	0000938206	718,199	1.49%	▲106,801	+17.47%	$45.93Mn
14	State Street Corp	0000093751	704,194	1.46%	▲627,561	+818.92%	$45.03Mn
15	ACADIAN ASSET MANAGEMENT LLC	0000916542	679,083	1.41%	▼657,230	-49.18%	$43.41K
16	Point72 Asset Management, L.P.	0001603466	659,493	1.37%	▲18,535	+2.89%	$42.17Mn
17	RICE HALL JAMES & ASSOCIATES, LLC	0001230765	624,928	1.30%	▲16,512	+2.71%	$39.96Mn
18	Pictet Asset Management Holding SA	0001993888	608,650	1.26%	▼14,638	-2.35%	$38.92Mn
19	GEODE CAPITAL MANAGEMENT, LLC	0001214717	604,180	1.25%	▲559,860	+1,263.22%	$38.63Mn
20	Jupiter Topco LLC	0002146052	586,177	1.22%	▲586,177	0.00%	$37.47Mn

Showing 1 to 20 of 267 holders