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GHRS

GH Research PLC
$27.01 +0.59 (+2.23%) At close · Jul 2
Market Cap
$1.85B
Shares
62,029,395

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 55
Total Value: $820,056,738
Total Shares: 58,325,517

Institutional Ownership Trend

20 quarters

Holder Concentration

Across 55 13F filers · Δ vs Dec 31, 2025
Top Holder
22.6%
Jun 2023 → Mar 2026 · range 19.8% – 51.8%
+0.3 pts
Top 5
80.2%
Jun 2023 → Mar 2026 · range 75.0% – 92.1%
−1.1 pts
Top 10
92.5%
Jun 2023 → Mar 2026 · range 92.2% – 98.6%
+0.3 pts
HHI
1,414
Jun 2023 → Mar 2026 · range 1,269 – 3,234
Broadly held−26

Quarterly Activity

vs Dec 31, 2025
New
12
Increased
19
Decreased
14
Sold Out
10
Unchanged
10
Holder count: +2
Institutional value: +38.3%
Shares held: +24.9%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Small Lynx1 Capital Management LP +11,120,001 21,526,576
Mega MILLENNIUM MANAGEMENT LLC +641,972 937,898
Small Troluce Capital Advisors LLC +617,260 990,472
Mid BOOTHBAY FUND MANAGEMENT, LLC +170,707 282,891
Mega UBS Group AG +49,035 412,416

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mid BVF INC/IL −177,554 8,650,158
Large MARSHALL WACE, LLP −149,656 91,108
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP −91,077 11,200
Mid CenterBook Partners LP −66,867 216,574
Mega GOLDMAN SACHS GROUP INC −36,191 44,795

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Large TORONTO DOMINION BANK 1,397,873 $19,654,094
Small Foresite Capital Management VI LLC 315,492 $4,435,817
Small Occam Crest Management LP 80,000 $1,124,800
Small DIADEMA PARTNERS LP 26,836 $377,314
Large RENAISSANCE TECHNOLOGIES LLC 20,614 $289,832

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mid Cormorant Asset Management, LP 1,300,000 $16,510,000
Large Verition Fund Management LLC 673,735 $8,556,434
Large Alyeska Investment Group, L.P. 204,975 $2,603,182
Mega JANE STREET GROUP, LLC 71,805 $911,923
Mid BIT Capital GmbH 50,000 $635,000
Filter: New 12 Increased 19 Reduced 14 Sold out 10 Unchanged 10
Showing 56 of 56
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Small Lynx1 Capital Management LP $151,331,829 18.45% 10,763,288
Small Lynx1 Capital Management LP $151,331,829 18.45% 10,763,288
Mid BVF INC/IL $121,621,221 14.83% 8,650,158
Mid RA CAPITAL MANAGEMENT, L.P. $107,934,359 13.16% 7,676,697
Large RTW INVESTMENTS, LP $83,429,438 10.17% 5,933,815
Mega FMR LLC $72,212,792 8.81% 5,136,045
Large Avoro Capital Advisors LLC $25,308,000 3.09% 1,800,000
Large TORONTO DOMINION BANK Bank $19,654,094 2.40% 1,397,873
Small Troluce Capital Advisors LLC $13,926,036 1.70% 990,472
Mega MILLENNIUM MANAGEMENT LLC $13,186,845 1.61% 937,898
Large Jefferies Financial Group Inc. $10,014,938 1.22% 712,300
Small 5AM Venture Management, LLC $8,051,669 0.98% 572,665
Mega BlackRock, Inc. $6,405,987 0.78% 455,618
Mega UBS Group AG $5,798,567 0.71% 412,416
Small Squadron Capital Management LLC $4,569,500 0.56% 325,000
Small Foresite Capital Management VI LLC $4,435,817 0.54% 315,492
Mid BOOTHBAY FUND MANAGEMENT, LLC $3,977,447 0.49% 282,891
Mid CenterBook Partners LP $3,045,030 0.37% 216,574
Small HighVista Strategies LLC $2,997,760 0.37% 213,212
Large MARSHALL WACE, LLP $1,280,977 0.16% 91,108
Small Occam Crest Management LP $1,124,800 0.14% 80,000
Large Trexquant Investment LP $981,500 0.12% 69,808
Small AdvisorShares Investments LLC $942,498 0.11% 67,034
Mega CITADEL ADVISORS LLC $920,423 0.11% 65,464
Mid XTX Topco Ltd $732,385 0.09% 52,090
Mega GOLDMAN SACHS GROUP INC $629,817 0.08% 44,795
Mega GEODE CAPITAL MANAGEMENT, LLC $569,190 0.07% 40,483
Mega NORTHERN TRUST CORP Bank $459,550 0.06% 32,685
Small DIADEMA PARTNERS LP $377,314 0.05% 26,836
Mega MORGAN STANLEY $363,168 0.04% 25,830
Small Virtus Investment Advisers, LLC $294,135 0.04% 20,920
Large RENAISSANCE TECHNOLOGIES LLC $289,832 0.04% 20,614
Mega JPMORGAN CHASE & CO $265,073 0.03% 18,853
Large TUDOR INVESTMENT CORP ET AL $260,953 0.03% 18,560
Large HighTower Advisors, LLC $219,336 0.03% 15,600
Mid China Universal Asset Management Co., Ltd. $189,908 0.02% 13,507
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $157,472 0.02% 11,200
Mega STATE STREET CORP $155,348 0.02% 11,049
Micro Lion Point Capital, LP $143,412 0.02% 10,200
Small Persistent Asset Partners Ltd $95,523 0.01% 6,794
Large OSAIC HOLDINGS, INC. $83,305 0.01% 5,925
Mega BARCLAYS PLC $61,779 0.01% 4,394
Large Mirae Asset Global Investments Co., Ltd. $45,484 0.01% 3,235
Mega ROYAL BANK OF CANADA Bank $36,415 0.00% 2,590
Mid North Star Investment Management Corp. $30,932 0.00% 2,200
Mega CITIGROUP INC $24,365 0.00% 1,733
Mid GF FUND MANAGEMENT CO. LTD. $19,459 0.00% 1,384
Mega BNP PARIBAS ARBITRAGE, SA $18,418 0.00% 1,310
Mega WELLS FARGO & COMPANY/MN $17,575 0.00% 1,250
Small Arkos Global Advisors $16,590 0.00% 1,180
Mid Tower Research Capital LLC (TRC) $9,349 0.00% 665
Mid Ancora Advisors LLC $3,993 0.00% 284
Mid Farther Finance Advisors, LLC $1,406 0.00% 100
Mid SIMPLEX TRADING, LLC $1,166 0.00% 83
Micro Cornerstone Financial Management LLC $449 0.00% 32
Mid SBI Securities Co., Ltd. Broker-Dealer $281 0.00% 20
Key facts CIK 1855129 CUSIP G3855L106 Visit website Investor relations

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