Who owns KNSAWhat KNSA owns — n/a

Who owns Kiniksa Pharmaceuticals International, plc?

Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.

Institutional ownership of KNSA from SEC Form 13F filings across 265 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.

As of the 2026-06-30 reporting period, 265 institutions disclosed 61.0M shares of Kiniksa Pharmaceuticals International, plc worth $2.26B; the largest disclosed holder is FMR LLC. Source: SEC Form 13F filings, parsed by EvidInvest.

265

13F holders

$2.26B

value, 2026 filers

61.0M

shares disclosed

new positions (2026 filers)

Top institutional holders

ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of KNSA's shares outstanding

#	Manager	Shares	Value	% of fund	% of co.	Δ shares QoQ
1	FMR LLC	6.8M	$328.6M	0.0%	—	—
2	Rubric Capital Management LP	3.8M	$180.6M	1.9%	—	—
3	BAKER BROS. ADVISORS LP	2.8M	$136.1M	0.8%	—	—
4	VANGUARD GROUP INC	3.1M	$128.4M	0.0%	—	—
5	TANG CAPITAL MANAGEMENT LLC	2.3M	$108.8M	5.5%	—	—
6	BlackRock Inc.	4.6M	$85.7M	0.0%	—	—
7	ACADIAN ASSET MANAGEMENT LLC	1.3M	$64.3M	0.1%	—	—
8	VANGUARD CAPITAL MANAGEMENT LLC	1.3M	$64.2M	0.0%	—	—
9	Caption Management, LLC	999,400	$48.1M	0.3%	—	—
10	MORGAN STANLEY	997,786	$48.0M	0.0%	—	—
11	PICTET ASSET MANAGEMENT LTD	3.3M	$46.5M	0.1%	—	—
12	D. E. Shaw & Co., Inc.	959,257	$46.2M	0.0%	—	—
13	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	892,666	$43.0M	0.0%	—	—
14	DIMENSIONAL FUND ADVISORS LP	811,922	$39.1M	0.0%	—	—
15	Pictet Asset Management Holding SA	608,650	$38.9M	0.0%	—	—
16	BANK OF AMERICA CORP /DE/	735,940	$35.4M	0.0%	—	—
17	Qube Research & Technologies Ltd	686,853	$33.1M	0.0%	—	—
18	Connor, Clark & Lunn Investment Management Ltd.	649,629	$31.3M	0.1%	—	—
19	BNP PARIBAS ARBITRAGE, SNC	647,731	$31.2M	0.0%	—	—
20	Point72 Asset Management, L.P.	640,958	$30.9M	0.0%	—	—
21	SG Americas Securities, LLC	640,179	$30.8M	0.0%	—	—
22	DRIEHAUS CAPITAL MANAGEMENT LLC	611,398	$29.4M	0.2%	—	—
23	RICE HALL JAMES & ASSOCIATES, LLC	608,416	$29.3M	1.6%	—	—
24	MASSACHUSETTS FINANCIAL SERVICES CO /MA/	431,324	$27.6M	0.0%	—	—
25	MILLENNIUM MANAGEMENT LLC	564,420	$27.2M	0.0%	—	—

Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.