KNSA · Kiniksa Pharmaceuticals International, plc · Shareholders & Ownership

$84.79 +5.31 (+6.68%)

Russell 2000 member Rebalance outlook locked

Market Cap

$12.40B

156.05M

Volume · Oct 20 1.23M Avg daily vol (3M) 597.48K

Every disclosed holder of KNSA in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns KNSA

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	272	46,890,116	30.05%	Yes
Insiders (Forms 3, 4, 5)	0	0	0.00%	No
13D/G-only blocks	1	1,582,635	1.01%	Yes
Remaining	—	107,575,275	68.94%	Rest
Registered funds (N-PORT, not summed)	61	4,807,837	3.08%	No

Shares outstanding: 156,048,026, the issuer's latest cover-page count restated onto today's split basis.

Insiders are listed but not summed: the issuer has more than one class of common stock and Forms 3, 4 and 5 report one issuer-wide balance across them.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of KNSA

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	FMR LLC 13F CIK 315066 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	6,971,361	4.47%	+147,661	Jun 30, 2026	carried, not yet filed for the newest quarter
2	Rubric Capital Management LP 13F CIK 1687509 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,999,800	2.56%	+249,800	Jun 30, 2026	carried, not yet filed for the newest quarter
3	BAKER BROS. ADVISORS LP 13F CIK 1263508 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,834,643	1.82%	+8,397	Jun 30, 2026	carried, not yet filed for the newest quarter
3.1	BAKER BROS. ADVISORS LP Insider CIK 1263508 · May 29, 2026 Director, 10% Owner, issuer-wide, not summed	2,759,734	1.77%	—	May 29, 2026	Director, 10% Owner, issuer-wide, not summed
4	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	2,739,615	1.76%	+2,252,878	Jun 30, 2026	carried, not yet filed for the newest quarter
4.1	BlackRock, Inc. 13G CIK 2012383 · Holding company · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	2,534,789	1.62%	+2,116,638	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
4.2	iShares MSCI World Small-Cap ETF Fund S000091430 · Registered fund · May 31, 2026 iShares Trust, not summed	2,076	0.00%	—	May 31, 2026	iShares Trust, not summed
5	TANG CAPITAL MANAGEMENT LLC 13F CIK 1232621 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	2,259,889	1.45%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
6	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,911,335	1.22%	+145,067	Jun 30, 2026	carried, not yet filed for the newest quarter
7	HHLR ADVISORS, LTD. 13G CIK 1762304 · Exempt reporting adviser · Sep 30, 2024 Rule 13d-1(c), passive investor	1,582,635	1.01%	—	Sep 30, 2024	Rule 13d-1(c), passive investor
8	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,360,840	0.87%	+27,747	Jun 30, 2026	carried, not yet filed for the newest quarter
9	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	1,318,452	0.84%	+29,043	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
10	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,011,143	0.65%	+13,357	Jun 30, 2026	carried, not yet filed for the newest quarter
11	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 13F CIK 1164508 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	957,514	0.61%	+64,848	Jun 30, 2026	carried, not yet filed for the newest quarter
12	VANGUARD SMALL-CAP INDEX FUND Fund S000002845 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	954,719	0.61%	+3,171	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
13	Spruce Street Capital LP 13F CIK 2050194 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	918,070	0.59%	+157,007	Jun 30, 2026	carried, not yet filed for the newest quarter
14	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	874,786	0.56%	+62,864	Jun 30, 2026	carried, not yet filed for the newest quarter
14.1	Dimensional U.S. Small Cap ETF Fund S000070906 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	149,712	0.10%	+1,329	Jul 31, 2026	Dimensional ETF Trust, not summed
14.2	Dimensional U.S. Core Equity 2 ETF Fund S000070903 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	88,365	0.06%	-633	Jul 31, 2026	Dimensional ETF Trust, not summed
14.3	Dimensional U.S. Equity Market ETF Fund S000070902 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	11,390	0.01%	-1,037	Jul 31, 2026	Dimensional ETF Trust, not summed
14.4	Dimensional US Core Equity Market ETF Fund S000069432 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	8,599	0.01%	+208	Jul 31, 2026	Dimensional ETF Trust, not summed
14.5	Dimensional US Core Equity 1 ETF Fund S000081780 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	3,131	0.00%	+569	Jul 31, 2026	Dimensional ETF Trust, not summed
15	Invesco Ltd. 13F CIK 914208 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	772,806	0.50%	+745,150	Jun 30, 2026	carried, not yet filed for the newest quarter
15.1	Invesco Small Cap Growth Fund Fund S000000476 · Registered fund · Jun 30, 2026 AIM Growth Series (Invesco Growth Series), not summed	249,540	0.16%	—	Jun 30, 2026	AIM Growth Series (Invesco Growth Series), not summed
15.2	Invesco Health Care Fund Fund S000000235 · Registered fund · Jul 31, 2026 AIM Investment Funds (Invesco Investment Funds), not summed	22,546	0.01%	—	Jul 31, 2026	AIM Investment Funds (Invesco Investment Funds), not summed
15.3	Invesco RAFI US 1500 Small-Mid ETF Fund S000013120 · Registered fund · Jul 31, 2026 Invesco Exchange-Traded Fund Trust, not summed	20,358	0.01%	-4,135	Jul 31, 2026	Invesco Exchange-Traded Fund Trust, not summed
15.4	Invesco Nasdaq Biotechnology ETF Fund S000072469 · Registered fund · May 31, 2026 Invesco Exchange-Traded Fund Trust II, not summed	2,461	0.00%	-77	May 31, 2026	Invesco Exchange-Traded Fund Trust II, not summed
16	Driehaus Capital Management LLC 13F CIK 938206 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	718,199	0.46%	+106,801	Jun 30, 2026	carried, not yet filed for the newest quarter
16.1	Driehaus Micro Cap Growth Fund Fund S000042829 · Registered fund · Jun 30, 2026 Driehaus Mutual Funds, not summed	113,088	0.07%	+15,439	Jun 30, 2026	Driehaus Mutual Funds, not summed
17	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	704,194	0.45%	+627,561	Jun 30, 2026	carried, not yet filed for the newest quarter
18	ACADIAN ASSET MANAGEMENT LLC 13F CIK 916542 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	679,083	0.44%	-657,230	Jun 30, 2026	carried, not yet filed for the newest quarter
19	Point72 Asset Management, L.P. 13F CIK 1603466 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	659,493	0.42%	+18,535	Jun 30, 2026	carried, not yet filed for the newest quarter
20	RICE HALL JAMES & ASSOCIATES, LLC 13F CIK 1230765 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	624,928	0.40%	+16,512	Jun 30, 2026	carried, not yet filed for the newest quarter
21	Pictet Asset Management Holding SA 13F CIK 1993888 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	608,650	0.39%	-14,638	Jun 30, 2026	carried, not yet filed for the newest quarter
22	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	604,180	0.39%	+559,860	Jun 30, 2026	carried, not yet filed for the newest quarter
23	Jupiter Topco LLC 13F CIK 2146052 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	586,177	0.38%	+105,154	Jun 30, 2026	carried, not yet filed for the newest quarter
24	Connor, Clark & Lunn Investment Management Ltd. 13F CIK 1596800 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	572,598	0.37%	-77,031	Jun 30, 2026	carried, not yet filed for the newest quarter
25	D. E. Shaw & Co., Inc. 13F CIK 1009207 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	569,756	0.37%	-389,501	Jun 30, 2026	carried, not yet filed for the newest quarter
26	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	561,480	0.36%	+140,566	Jun 30, 2026	carried, not yet filed for the newest quarter
27	ALLIANCEBERNSTEIN L.P. 13F CIK 1109448 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	556,151	0.36%	-42,737	Jun 30, 2026	carried, not yet filed for the newest quarter
28	VANGUARD SMALL-CAP GROWTH INDEX FUND Fund S000002846 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	551,977	0.35%	+16,995	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
29	VICTORY CAPITAL MANAGEMENT INC 13F CIK 1040188 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	504,853	0.32%	-1,668	Jun 30, 2026	carried, not yet filed for the newest quarter
29.1	Victory Trivalent International Small-Cap Fund Fund S000046400 · Registered fund · Jun 30, 2026 Victory Portfolios, not summed	332,730	0.21%	0	Jun 30, 2026	Victory Portfolios, not summed
29.2	Victory Small Cap Stock Fund Fund S000012914 · Registered fund · Jul 31, 2026 Victory Portfolios III, not summed	32,607	0.02%	-5,421	Jul 31, 2026	Victory Portfolios III, not summed
29.3	Victory Extended Market Index Fund Fund S000012941 · Registered fund · Jul 31, 2026 Victory Portfolios III, not summed	5,116	0.00%	+90	Jul 31, 2026	Victory Portfolios III, not summed
30	SG Americas Securities, LLC 13F CIK 1313360 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	504,001	0.32%	-136,178	Jun 30, 2026	carried, not yet filed for the newest quarter
31	BNP PARIBAS ARBITRAGE, SA 13F CIK 1166588 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	437,192	0.28%	-210,539	Jun 30, 2026	carried, not yet filed for the newest quarter
32	MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 13F CIK 912938 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	431,324	0.28%	-6,678	Jun 30, 2026	carried, not yet filed for the newest quarter
33	ORBIMED ADVISORS LLC 13F CIK 1055951 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	420,600	0.27%	+240,001	Jun 30, 2026	carried, not yet filed for the newest quarter
34	BANK OF AMERICA CORP /DE/ 13F CIK 70858 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	413,411	0.26%	-322,529	Jun 30, 2026	carried, not yet filed for the newest quarter
35	OBERWEIS ASSET MANAGEMENT INC/ 13F CIK 937886 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	413,034	0.26%	+94,400	Jun 30, 2026	carried, not yet filed for the newest quarter
35.1	Oberweis Micro-Cap Fund Fund S000010231 · Registered fund · Jun 30, 2026 OBERWEIS FUNDS, not summed	389,800	0.25%	+84,600	Jun 30, 2026	OBERWEIS FUNDS, not summed
35.2	Oberweis Global Opportunities Fund Fund S000010230 · Registered fund · Jun 30, 2026 OBERWEIS FUNDS, not summed	7,400	0.00%	—	Jun 30, 2026	OBERWEIS FUNDS, not summed
36	Aberdeen Group plc 13F CIK 1716774 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	403,485	0.26%	+29,851	Jun 30, 2026	carried, not yet filed for the newest quarter
37	Fisher Asset Management, LLC 13F CIK 850529 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	398,266	0.26%	-30,706	Jun 30, 2026	carried, not yet filed for the newest quarter
38	DEUTSCHE BANK AG\ 13F CIK 948046 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	387,606	0.25%	-136,085	Jun 30, 2026	carried, not yet filed for the newest quarter
39	AQR CAPITAL MANAGEMENT LLC 13F CIK 1167557 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	375,039	0.24%	-3,658	Jun 30, 2026	carried, not yet filed for the newest quarter
40	Penn Capital Management Company, LLC 13F CIK 1158202 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	368,114	0.24%	+66,121	Jun 30, 2026	carried, not yet filed for the newest quarter
41	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	315,246	0.20%	+278,322	Jun 30, 2026	carried, not yet filed for the newest quarter
41.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	21,277	0.01%	—	Jun 30, 2026	Northern Funds, not summed
41.2	Small Cap Core Fund Fund S000001244 · Registered fund · Jun 30, 2026 Northern Funds, not summed	7,140	0.00%	+211	Jun 30, 2026	Northern Funds, not summed
41.3	Active M International Equity Fund Fund S000012492 · Registered fund · Jun 30, 2026 Northern Funds, not summed	6,308	0.00%	0	Jun 30, 2026	Northern Funds, not summed
42	Balyasny Asset Management L.P. 13F CIK 1218710 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	309,682	0.20%	-190,110	Jun 30, 2026	carried, not yet filed for the newest quarter
43	Qube Research & Technologies Ltd 13F CIK 1729829 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	304,080	0.19%	-382,773	Jun 30, 2026	carried, not yet filed for the newest quarter
44	NEW YORK STATE COMMON RETIREMENT FUND 13F CIK 810265 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	272,579	0.17%	+62,962	Jun 30, 2026	carried, not yet filed for the newest quarter
45	NOMURA HOLDINGS INC 13F CIK 1163653 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	270,724	0.17%	-72,215	Jun 30, 2026	carried, not yet filed for the newest quarter
46	Soleus Capital Management, L.P. 13F CIK 1802630 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	246,353	0.16%	-275,000	Jun 30, 2026	carried, not yet filed for the newest quarter
47	Bank of New York Mellon Corp 13F CIK 1390777 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	232,531	0.15%	+215,143	Jun 30, 2026	carried, not yet filed for the newest quarter
48	ArrowMark Colorado Holdings LLC 13F CIK 1483859 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	215,546	0.14%	-101,410	Jun 30, 2026	carried, not yet filed for the newest quarter
49	STEMPOINT CAPITAL LP 13F CIK 1952142 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	209,234	0.13%	+209,234	Jun 30, 2026	carried, not yet filed for the newest quarter
50	ESSEX INVESTMENT MANAGEMENT CO LLC 13F CIK 201772 · Registered investment adviser · Sep 30, 2026	202,021	0.13%	-39,361	Sep 30, 2026

1 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 315 holders

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Key facts CIK 1730430 CUSIP G52694109 13F (30d) 24 filings 24 filers Visit website Investor relations