GHRS · GH Research PLC · Shareholders & Ownership

$19.52 -0.76 (-3.75%)

Market Cap

$1.39B

68.64M

Volume · Nov 4 181.36K Avg daily vol (3M) 305.52K

Every disclosed holder of GHRS 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 GHRS

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

No chart: shares outstanding cannot be set against these holders.

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	66	51,708,860	—	Yes
Insiders (Forms 3, 4, 5)	5	15,005,314	—	Yes
13D/G-only blocks	3	11,930,305	—	Yes
Registered funds (N-PORT, not summed)	5	72,359	—	No

% Out is unavailable: a foreign private issuer reports ordinary shares, a different unit from the listed shares.

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 GHRS

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	Schonharting Florian Insider CIK 1360509 · Apr 1, 2026 Director, issuer-wide	14,824,419	—	—	Apr 1, 2026	Director, issuer-wide
2	Lynx1 Capital Management LP 13G CIK 1910456 · Registered investment adviser · Jun 30, 2026 Rule 13d-1(c), passive investor, not summed	13,263,288	—	+2,500,000	Jun 30, 2026	Rule 13d-1(c), passive investor, not summed
2.1	Lynx1 Capital Management LP 13F CIK 1910456 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	13,263,288	—	+2,500,000	Jun 30, 2026	carried, not yet filed for the newest quarter
3	BIOTECHNOLOGY VALUE FUND L P 13G CIK 918923 · Unknown · Mar 31, 2025 Rule 13d-1(d), exempt investor	8,827,712	—	-1,572,446	Mar 31, 2025	Rule 13d-1(d), exempt investor
4	BVF INC/IL 13F CIK 1056807 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	8,650,158	—	0	Jun 30, 2026	carried, not yet filed for the newest quarter
5	FMR LLC 13F CIK 315066 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	5,977,045	—	+841,000	Jun 30, 2026	carried, not yet filed for the newest quarter
6	RTW INVESTMENTS, LP 13F CIK 1493215 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	5,933,815	—	0	Jun 30, 2026	carried, not yet filed for the newest quarter
7	RA CAPITAL MANAGEMENT, L.P. 13G CIK 1346824 · Registered investment adviser · Aug 12, 2026 Rule 13d-1(c), passive investor, not summed	4,897,182	—	-2,779,515	Aug 12, 2026	Rule 13d-1(c), passive investor, not summed
7.1	RA CAPITAL MANAGEMENT, L.P. 13F CIK 1346824 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	7,636,813	—	-39,884	Jun 30, 2026	carried, not yet filed for the newest quarter
8	Deep Track Capital, LP 13F CIK 1856083 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,333,334	—	+3,333,334	Jun 30, 2026	carried, not yet filed for the newest quarter
9	Avoro Capital Advisors LLC 13F CIK 1633313 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,800,000	—	0	Jun 30, 2026	carried, not yet filed for the newest quarter
10	Terwey Theis H 13G CIK 1909586 · Unknown · Sep 30, 2025 Rule 13d-1(d), exempt investor	1,784,266	—	-2,908,637	Sep 30, 2025	Rule 13d-1(d), exempt investor
11	Venrock Healthcare Capital Partners II, L.P. 13G CIK 1602264 · Unknown · Dec 31, 2023 Rule 13d-1(c), passive investor, unconfirmed, last confirmed Dec 31, 2023	1,318,327	—	—	Dec 31, 2023	Rule 13d-1(c), passive investor, unconfirmed, last confirmed Dec 31, 2023
12	Foresite Capital Management VI LLC 13F CIK 2013341 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	940,493	—	+625,001	Jun 30, 2026	carried, not yet filed for the newest quarter
13	Jefferies Financial Group Inc. 13F CIK 96223 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	712,300	—	0	Jun 30, 2026	carried, not yet filed for the newest quarter
14	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	480,287	—	+24,669	Jun 30, 2026	carried, not yet filed for the newest quarter
14.1	iShares MSCI Ireland ETF Fund S000028681 · Registered fund · Aug 31, 2026 iShares Trust, not summed	52,763	—	+5,363	Aug 31, 2026	iShares Trust, not summed
15	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	477,408	—	+64,992	Jun 30, 2026	carried, not yet filed for the newest quarter
16	MILLENNIUM MANAGEMENT LLC 13F CIK 1273087 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	323,399	—	-614,499	Jun 30, 2026	carried, not yet filed for the newest quarter
17	BRAIDWELL LP 13F CIK 1920938 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	207,240	—	+207,240	Jun 30, 2026	carried, not yet filed for the newest quarter
18	BOOTHBAY FUND MANAGEMENT, LLC 13F CIK 1549230 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	202,103	—	-80,788	Jun 30, 2026	carried, not yet filed for the newest quarter
19	Y-Intercept (Hong Kong) Ltd 13F CIK 1772875 · Exempt reporting adviser · Sep 30, 2026	170,315	—	+170,315	Sep 30, 2026
20	JANE STREET GROUP, LLC 13F CIK 1595888 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	169,951	—	+169,951	Jun 30, 2026	carried, not yet filed for the newest quarter
21	HighVista Strategies LLC 13F CIK 1335325 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	158,770	—	-54,442	Jun 30, 2026	carried, not yet filed for the newest quarter
22	Trexquant Investment LP 13F CIK 1633445 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	153,767	—	+83,959	Jun 30, 2026	carried, not yet filed for the newest quarter
23	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	148,673	—	+103,878	Jun 30, 2026	carried, not yet filed for the newest quarter
24	Halle Magnus Clemensen Insider CIK 2126830 · Mar 18, 2026 Managing Director, Ireland, issuer-wide	118,354	—	—	Mar 18, 2026	Managing Director, Ireland, issuer-wide
25	XTX Topco Ltd 13F CIK 1828301 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	86,986	—	+34,896	Jun 30, 2026	carried, not yet filed for the newest quarter
26	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	85,952	—	+20,488	Jun 30, 2026	carried, not yet filed for the newest quarter
27	AdvisorShares Investments LLC 13F CIK 1425930 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	71,267	—	+4,233	Jun 30, 2026	carried, not yet filed for the newest quarter
28	Premier Fund Managers Ltd 13F CIK 1673907 · Exempt reporting adviser · Sep 30, 2026	66,815	—	+66,815	Sep 30, 2026
29	HRT FINANCIAL LP 13F CIK 1475597 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	65,375	—	+65,375	Jun 30, 2026	carried, not yet filed for the newest quarter
30	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	52,218	—	+26,388	Jun 30, 2026	carried, not yet filed for the newest quarter
31	Point72 Asset Management, L.P. 13F CIK 1603466 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	50,882	—	+50,882	Jun 30, 2026	carried, not yet filed for the newest quarter
32	MARSHALL WACE, LLP 13F CIK 1318757 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	46,697	—	-44,411	Jun 30, 2026	carried, not yet filed for the newest quarter
33	Forer Michael Insider CIK 2126827 · Mar 18, 2026 Director, issuer-wide	45,509	—	—	Mar 18, 2026	Director, issuer-wide
34	Qube Research & Technologies Ltd 13F CIK 1729829 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	43,948	—	+43,948	Jun 30, 2026	carried, not yet filed for the newest quarter
35	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	40,483	—	0	Jun 30, 2026	carried, not yet filed for the newest quarter
36	Axxion S.A. 13F CIK 2030181 · Unknown · Sep 30, 2026	36,170	—	0	Sep 30, 2026
37	TUDOR INVESTMENT CORP ET AL 13F CIK 923093 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	34,278	—	+15,718	Jun 30, 2026	carried, not yet filed for the newest quarter
38	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	31,844	—	-841	Jun 30, 2026	carried, not yet filed for the newest quarter
38.1	Small Cap Core Fund Fund S000001244 · Registered fund · Jun 30, 2026 Northern Funds, not summed	5,998	—	-258	Jun 30, 2026	Northern Funds, not summed
39	CenterBook Partners LP 13F CIK 1872738 · Registered investment adviser · Sep 30, 2026	26,258	—	-43,178	Sep 30, 2026
40	D. E. Shaw & Co., Inc. 13F CIK 1009207 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	25,345	—	+25,345	Jun 30, 2026	carried, not yet filed for the newest quarter
41	Quadrature Capital Ltd 13F CIK 1651424 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	21,117	—	+21,117	Jun 30, 2026	carried, not yet filed for the newest quarter
42	JPMORGAN CHASE & CO 13F CIK 19617 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	18,778	—	-75	Jun 30, 2026	carried, not yet filed for the newest quarter
43	Squarepoint Ops LLC 13F CIK 1642575 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	18,430	—	+18,430	Jun 30, 2026	carried, not yet filed for the newest quarter
44	China Universal Asset Management Co., Ltd. 13F CIK 1906594 · Unknown · Sep 30, 2026	17,525	—	+4,106	Sep 30, 2026
45	Virtus Investment Advisers, LLC 13F CIK 19481 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	15,492	—	-5,428	Jun 30, 2026	carried, not yet filed for the newest quarter
46	LETKO, BROSSEAU & ASSOCIATES INC 13F CIK 1297496 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	15,425	—	+15,425	Jun 30, 2026	carried, not yet filed for the newest quarter
47	Moore Duncan Insider CIK 1888265 · Mar 18, 2026 Director, issuer-wide	14,600	—	—	Mar 18, 2026	Director, issuer-wide
48	HighTower Advisors, LLC 13F CIK 1462245 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	12,700	—	-2,900	Jun 30, 2026	carried, not yet filed for the newest quarter
49	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	11,163	—	+114	Jun 30, 2026	carried, not yet filed for the newest quarter
50	Lion Point Capital, LP 13F CIK 1643354 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	10,200	—	0	Jun 30, 2026	carried, not yet filed for the newest quarter

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 77 holders

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Key facts CIK 1855129 CUSIP G3855L106 13F (30d) 12 filings 12 filers Visit website Investor relations