GHRS GH Research PLC
GH Research PLC (GHRS) Institutional Ownership
What the institutions did with GHRS last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| Lynx1 Capital Management LP | 13.3M | 25.8% |
| BVF INC/IL | 8.7M | 16.8% |
| RA CAPITAL MANAGEMENT, L.P. | 7.6M | 14.8% |
| FMR LLC | 6.0M | 11.6% |
| RTW INVESTMENTS, LP | 5.9M | 11.5% |
| Deep Track Capital, LP | 3.3M | 6.5% |
| Avoro Capital Advisors LLC | 1.8M | 3.5% |
| Foresite Capital Management VI LLC | 940.5K | 1.8% |
| Jefferies Financial Group Inc. | 712.3K | 1.4% |
| BlackRock, Inc. | 480.3K | 0.9% |
| UBS Group AG | 477.4K | 0.9% |
| MILLENNIUM MANAGEMENT LLC | 323.4K | 0.6% |
| BRAIDWELL LP | 207.2K | 0.4% |
| BOOTHBAY FUND MANAGEMENT, LLC | 202.1K | 0.4% |
| JANE STREET GROUP, LLC | 170.0K | 0.3% |
| HighVista Strategies LLC | 158.8K | 0.3% |
| Trexquant Investment LP | 153.8K | 0.3% |
| GOLDMAN SACHS GROUP INC | 148.7K | 0.3% |
| XTX Topco Ltd | 87.0K | 0.2% |
| CITADEL ADVISORS LLC | 86.0K | 0.2% |
| AdvisorShares Investments LLC | 71.3K | 0.1% |
| CenterBook Partners LP | 69.4K | 0.1% |
| HRT FINANCIAL LP | 65.4K | 0.1% |
| MORGAN STANLEY | 52.2K | 0.1% |
| Point72 Asset Management, L.P. | 50.9K | 0.1% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Deep Track Capital, LP | New | 0 | 3.3M | +3.3M |
| Lynx1 Capital Management LP | Increased | 10.8M | 13.3M | +2.5M |
| TORONTO DOMINION BANK | Sold Out | 1.4M | 0 | -1.4M |
| Troluce Capital Advisors LLC | Sold Out | 990.5K | 0 | -990.5K |
| FMR LLC | Increased | 5.1M | 6.0M | +841.0K |
| Foresite Capital Management VI LLC | Increased | 315.5K | 940.5K | +625.0K |
| MILLENNIUM MANAGEMENT LLC | Reduced | 937.9K | 323.4K | -614.5K |
| 5AM Venture Management, LLC | Sold Out | 572.7K | 0 | -572.7K |
| Squadron Capital Management LLC | Sold Out | 325.0K | 0 | -325.0K |
| BRAIDWELL LP | New | 0 | 207.2K | +207.2K |
| JANE STREET GROUP, LLC | New | 0 | 170.0K | +170.0K |
| CenterBook Partners LP | Reduced | 216.6K | 69.4K | -147.1K |
| GOLDMAN SACHS GROUP INC | Increased | 44.8K | 148.7K | +103.9K |
| Trexquant Investment LP | Increased | 69.8K | 153.8K | +84.0K |
| BOOTHBAY FUND MANAGEMENT, LLC | Reduced | 282.9K | 202.1K | -80.8K |
| Occam Crest Management LP | Sold Out | 80.0K | 0 | -80.0K |
| HRT FINANCIAL LP | New | 0 | 65.4K | +65.4K |
| UBS Group AG | Increased | 412.4K | 477.4K | +65.0K |
| HighVista Strategies LLC | Reduced | 213.2K | 158.8K | -54.4K |
| Point72 Asset Management, L.P. | New | 0 | 50.9K | +50.9K |
| MARSHALL WACE, LLP | Reduced | 91.1K | 46.7K | -44.4K |
| Qube Research & Technologies Ltd | New | 0 | 43.9K | +43.9K |
| RA CAPITAL MANAGEMENT, L.P. | Reduced | 7.7M | 7.6M | -39.9K |
| XTX Topco Ltd | Increased | 52.1K | 87.0K | +34.9K |
| DIADEMA PARTNERS LP | Sold Out | 26.8K | 0 | -26.8K |
| MORGAN STANLEY | Increased | 25.8K | 52.2K | +26.4K |
| D. E. Shaw & Co., Inc. | New | 0 | 25.3K | +25.3K |
| BlackRock, Inc. | Increased | 455.6K | 480.3K | +24.7K |
| Quadrature Capital Ltd | New | 0 | 21.1K | +21.1K |
| RENAISSANCE TECHNOLOGIES LLC | Sold Out | 20.6K | 0 | -20.6K |
| CITADEL ADVISORS LLC | Increased | 65.5K | 86.0K | +20.5K |
| Squarepoint Ops LLC | New | 0 | 18.4K | +18.4K |
| TUDOR INVESTMENT CORP ET AL | Increased | 18.6K | 34.3K | +15.7K |
| LETKO, BROSSEAU & ASSOCIATES INC | New | 0 | 15.4K | +15.4K |
| Eversept Partners, LP | New | 0 | 8.7K | +8.7K |
| HSBC HOLDINGS PLC | New | 0 | 7.8K | +7.8K |
| Persistent Asset Partners Ltd | Sold Out | 6.8K | 0 | -6.8K |
| Virtus Investment Advisers, LLC | Reduced | 20.9K | 15.5K | -5.4K |
| SIMPLEX TRADING, LLC | Increased | 83 | 4.7K | +4.7K |
| AdvisorShares Investments LLC | Increased | 67.0K | 71.3K | +4.2K |
| ROYAL BANK OF CANADA | Increased | 2.6K | 5.9K | +3.3K |
| HighTower Advisors, LLC | Reduced | 15.6K | 12.7K | -2.9K |
| BARCLAYS PLC | Increased | 4.4K | 6.0K | +1.6K |
| Arkos Global Advisors | Sold Out | 1.2K | 0 | -1.2K |
| NORTHERN TRUST CORP | Reduced | 32.7K | 31.8K | -841 |
| HARBOUR INVESTMENTS, INC. | New | 0 | 800 | +800 |
| JONES FINANCIAL COMPANIES LLLP | New | 0 | 775 | +775 |
| SBI Securities Co., Ltd. | Increased | 20 | 411 | +391 |
| BNP PARIBAS FINANCIAL MARKETS | Increased | 1.3K | 1.7K | +387 |
| HOLLENCREST CAPITAL MANAGEMENT | New | 0 | 250 | +250 |
| Federation des caisses Desjardins du Quebec | New | 0 | 205 | +205 |
| Mirae Asset Global Investments Co., Ltd. | Reduced | 3.2K | 3.1K | -167 |
| OSAIC HOLDINGS, INC. | Reduced | 5.9K | 5.8K | -150 |
| Tower Research Capital LLC (TRC) | Reduced | 665 | 515 | -150 |
| CITIGROUP INC | Reduced | 1.7K | 1.6K | -119 |
| STATE STREET CORP | Increased | 11.0K | 11.2K | +114 |
| China Universal Asset Management Co., Ltd. | Reduced | 13.5K | 13.4K | -88 |
| JPMORGAN CHASE & CO | Reduced | 18.9K | 18.8K | -75 |
| GF FUND MANAGEMENT CO. LTD. | Reduced | 1.4K | 1.3K | -69 |
| Caitong International Asset Management Co., Ltd | New | 0 | 19 | +19 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.