GH ResearchGHRS
13F holders, Q1 2026 (March 31)At the end of Q1 2026, 54 institutions reported holding GH Research PLC (GHRS) in their 13F filings, up 1 from Q4 2025. 12 opened new positions and 10 sold out. The largest holders were Lynx1 Capital Management LP ($151.3M), BVF Inc. ($121.6M) and Ra Capital Management, L.P. ($107.9M). 4 famous investors held it, including Israel Englander (0.0% of Millennium Management's portfolio), Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- GH Research PLC
- CUSIP
- G3855L106
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 12 | $26.3M |
| Exits | 10 | $29.6M |
All 13F filers, Q4 2025 → Q1 2026: 3,811,207 shares bought and 2,824,056 shares sold, net +987,151 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 54 holders
| Lynx1 Capital Management LP | 23.92% | Add +3.4% | 10,763,288 | $151.3M |
| BVF Inc. | 3.87% | Reduce -2.0% | 8,650,158 | $121.6M |
| Ra Capital Management, L.P. | 1.14% | No change | 7,676,697 | $107.9M |
| RTW Investments, LP | 0.83% | No change | 5,933,815 | $83.4M |
| FMR LLC | 0.00% | No change | 5,136,045 | $72.2M |
| Avoro Capital Advisors LLC | 0.25% | No change | 1,800,000 | $25.3M |
| Toronto Dominion Bank | 0.04% | New | 1,397,873 | $19.7M |
| Troluce Capital Advisors LLC | 1.51% | Add +165.4% | 990,472 | $13.9M |
| Millennium Management | 0.01% | Add +216.9% | 937,898 | $13.2M |
| Jefferies Financial Group Inc. | 0.13% | No change | 712,300 | $10.0M |
| 5AM Venture Management, LLC | 2.24% | No change | 572,665 | $8.1M |
| BlackRock, Inc. | 0.00% | Add +4.9% | 455,618 | $6.4M |
| UBS Group AG | 0.00% | Add +13.5% | 412,416 | $5.8M |
| Squadron Capital Management LLC | 1.83% | Add +3.2% | 325,000 | $4.6M |
| Foresite Capital Management VI LLC | 0.96% | New | 315,492 | $4.4M |
| Boothbay Fund Management, LLC | 0.10% | Add +152.2% | 282,891 | $4.0M |
| CenterBook Partners LP | 0.16% | Reduce -23.6% | 216,574 | $3.0M |
| HighVista Strategies LLC | 0.83% | Reduce -11.4% | 213,212 | $3.0M |
| Marshall Wace, LLP | 0.00% | Reduce -62.2% | 91,108 | $1.3M |
| Occam Crest Management LP | 0.71% | New | 80,000 | $1.1M |
| Trexquant Investment LP | 0.01% | Add +27.4% | 69,808 | $982K |
| AdvisorShares Investments LLC | 0.17% | Reduce -0.1% | 67,034 | $942K |
| Citadel Advisors | 0.00% | Add +149.3% | 65,464 | $920K |
| XTX Topco Ltd | 0.01% | Add +17.2% | 52,090 | $732K |
| Goldman Sachs Group Inc. | 0.00% | Reduce -44.7% | 44,795 | $630K |
| Geode Capital Management, LLC | 0.00% | Add +13.6% | 40,483 | $569K |
| Northern Trust Corp. | 0.00% | Reduce -0.4% | 32,685 | $460K |
| Diadema Partners LP | 0.16% | New | 26,836 | $377K |
| Morgan Stanley | 0.00% | Reduce -49.8% | 25,830 | $363K |
| Virtus Investment Advisers, LLC | 0.08% | Add +2.5% | 20,920 | $294K |
| Renaissance Technologies | 0.00% | New | 20,614 | $290K |
| Tudor Investment Corporation | 0.00% | New | 18,560 | $261K |
| JPMorgan Chase & Co. | 0.00% | Reduce -0.1% | 18,853 | $246K |
| HighTower Advisors, LLC | 0.00% | No change | 15,600 | $219K |
| China Universal Asset Management Co., Ltd. | 0.01% | Add +33.6% | 13,507 | $190K |
| State Street Corp. | 0.00% | Add +2.1% | 11,049 | $155K |
| Lion Point Capital, LP | 0.86% | No change | 10,200 | $143K |
| Persistent Asset Partners Ltd | 0.04% | New | 6,794 | $96K |
| Osaic Holdings, Inc. | 0.00% | Reduce -40.9% | 5,925 | $83K |
| Barclays PLC | 0.00% | Add +107.5% | 4,394 | $62K |
| Mirae Asset Global Investments Co., Ltd. | 0.00% | Add +7.3% | 3,235 | $45K |
| Royal Bank of Canada | 0.00% | Add +43.1% | 2,590 | $36K |
| North Star Investment Management Corp. | 0.00% | New | 2,200 | $31K |
| Citigroup Inc. | 0.00% | Reduce -60.6% | 1,733 | $24K |
| GF Fund Management Co. LTD. | 0.00% | Add +13.6% | 1,384 | $19K |
| BNP Paribas Financial Markets | 0.00% | Reduce -2.0% | 1,310 | $18K |
| Wells Fargo & Company | 0.00% | No change | 1,250 | $18K |
| Arkos Global Advisors | 0.00% | New | 1,180 | $17K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -13.6% | 665 | $9K |
| Ancora Advisors LLC | 0.00% | New | 284 | $4K |
| Farther Finance Advisors, LLC | 0.00% | New | 100 | $1K |
| Simplex Trading, LLC | 0.00% | Add +72.9% | 83 | $1K |
| Cornerstone Financial Management LLC | 0.00% | New | 32 | $450 |
| SBI Securities Co., Ltd. | 0.00% | No change | 20 | $281 |
"% of holder's portfolio" is GHRS's weight in each manager's 13F, not the share of GH Research PLC the manager owns.