Latest Period
Q1 2026
Security Snapshot
GH Research PLC - Ordinary Shares, nominal value $0.025 per share (GHRS) Institutional Ownership
CUSIP: G3855L106
13F Institutional Holders and Ownership History from Q2 2021 to Q1 2026
Institutions Reporting
54
Shares (Excl. Options)
47,551,006
Price
$14.06
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- Security type / class
- Equity / Ordinary Shares, nominal value $0.025 per share
- Symbol
- GHRS on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 47,551,006
- Total 13F value
- $668,548,105
- Portfolio coverage rank
- 0%
- Share change
- +987,155
- Value change
- +$17,053,566
- Number of holders
- 54
- Shares outstanding
- 61,857,977
- SEC-reported price per share
- $22.38
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
2 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- GHRS - GH Research PLC - Ordinary Shares, nominal value $0.025 per share is tracked under CUSIP G3855L106.
- 54 institutions reported positions in Q1 2026.
- 6 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 53 to 54 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $591,366,552 to $668,548,105.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 54 institutions filings for Q1 2026.
Security key
G3855L106
Latest holder period
Q1 2026
13F holders
54
13D/G owners
6
CIK / CUSIP context first
Open Q1 2026 holders
GHRS full holder history
GH Research PLC SEC filings
GH Research PLC company facts
GH Research PLC insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP G3855L106:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
6
Security
GHRS
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Lynx1 Capital Management LP | 17% | +3.5% | $202,457,447 | +$6,709,772 | 10,763,288 | +3.4% | Lynx1 Capital Management LP | 31 Mar 2026 |
| BIOTECHNOLOGY VALUE FUND L P | 14% | $84,128,095 | 8,827,712 | BVF PARTNERS L P/IL | 31 Mar 2025 | |||
| RA CAPITAL MANAGEMENT, L.P. | 12% | +11% | $123,210,987 | +$11,749,386 | 7,676,697 | +11% | RA Capital Management, L.P. | 30 Jun 2025 |
| RTW INVESTMENTS, LP | 8.9% | $52,412,799 | 5,499,769 | RTW Investments, LP | 31 Mar 2025 | |||
| FMR LLC | 8.2% | +19% | $81,728,927 | +$13,523,168 | 5,092,145 | +20% | FMR LLC | 30 Jun 2025 |
| Terwey Theis H | 2.9% | -59% | $25,515,004 | -$41,593,509 | 1,784,266 | -62% | Terwey Theis H | 30 Sep 2025 |
As of 31 Mar 2026, 54 institutional investors reported holding 47,551,006 shares of GH Research PLC - Ordinary Shares, nominal value $0.025 per share (GHRS). This represents 77% of the company’s total 61,857,977 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
76%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| Lynx1 Capital Management LP | 17% | 10,763,288 | +3.4% | 24% | $151,331,829 |
| BVF INC/IL | 14% | 8,650,158 | -2% | 3.9% | $121,621,221 |
| RA CAPITAL MANAGEMENT, L.P. | 12% | 7,676,697 | 0% | 1.1% | $107,934,360 |
| RTW INVESTMENTS, LP | 9.6% | 5,933,815 | 0% | 0.83% | $83,429,439 |
| FMR LLC | 8.3% | 5,136,045 | 0% | 0% | $72,212,792 |
| Avoro Capital Advisors LLC | 2.9% | 1,800,000 | 0% | 0.25% | $25,308,000 |
| TORONTO DOMINION BANK | 2.3% | 1,397,873 | 0.04% | $19,654,094 | |
| Troluce Capital Advisors LLC | 1.6% | 990,472 | +165% | 1.5% | $13,926,036 |
| MILLENNIUM MANAGEMENT LLC | 1.5% | 937,898 | +217% | 0.01% | $13,186,846 |
| Jefferies Financial Group Inc. | 1.2% | 712,300 | 0% | 0.12% | $10,014,938 |
| 5AM Venture Management, LLC | 0.93% | 572,665 | 0% | 2.2% | $8,051,670 |
| BlackRock, Inc. | 0.74% | 455,618 | +4.9% | 0% | $6,405,989 |
| UBS Group AG | 0.67% | 412,416 | +13% | 0% | $5,798,569 |
| Squadron Capital Management LLC | 0.53% | 325,000 | +3.2% | 1.8% | $4,569,500 |
| Foresite Capital Management VI LLC | 0.51% | 315,492 | 0.96% | $4,435,818 | |
| BOOTHBAY FUND MANAGEMENT, LLC | 0.46% | 282,891 | +152% | 0.09% | $3,977,447 |
| CenterBook Partners LP | 0.35% | 216,574 | -24% | 0.16% | $3,045,030 |
| HighVista Strategies LLC | 0.34% | 213,212 | -11% | 0.83% | $2,997,761 |
| MARSHALL WACE, LLP | 0.15% | 91,108 | -62% | 0% | $1,280,978 |
| Occam Crest Management LP | 0.13% | 80,000 | 0.71% | $1,124,800 | |
| Trexquant Investment LP | 0.11% | 69,808 | +27% | 0.01% | $981,500 |
| AdvisorShares Investments LLC | 0.11% | 67,034 | -0.12% | 0.17% | $942,498 |
| CITADEL ADVISORS LLC | 0.11% | 65,464 | +149% | 0% | $920,424 |
| XTX Topco Ltd | 0.08% | 52,090 | +17% | 0.01% | $732,385 |
| GOLDMAN SACHS GROUP INC | 0.07% | 44,795 | -45% | 0% | $629,818 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
20
Latest
Q1 2026
Rows shown
1-20 of 20
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 47,551,006 | $668,548,105 | +$17,053,566 | $14.06 | 54 |
| 2025 Q4 | 46,564,278 | $591,366,552 | +$19,014,477 | $12.70 | 53 |
| 2025 Q3 | 44,533,428 | $618,134,274 | +$14,411,795 | $14.30 | 47 |
| 2025 Q2 | 43,554,151 | $530,925,463 | +$12,435,267 | $12.19 | 37 |
| 2025 Q1 | 42,619,365 | $470,078,472 | +$132,646,472 | $11.03 | 35 |
| 2024 Q4 | 30,702,522 | $214,921,353 | +$703,147 | $7.00 | 31 |
| 2024 Q3 | 30,520,551 | $204,184,484 | +$470,359 | $6.69 | 28 |
| 2024 Q2 | 30,425,860 | $354,768,061 | +$9,911,656 | $11.66 | 28 |
| 2024 Q1 | 29,598,383 | $315,521,410 | +$9,696,487 | $10.66 | 32 |
| 2023 Q4 | 29,604,263 | $171,708,593 | +$1,756,706 | $5.80 | 35 |
| 2023 Q3 | 29,004,299 | $291,487,763 | -$8,205,765 | $10.05 | 29 |
| 2023 Q2 | 29,634,294 | $351,618,806 | -$693,689 | $11.86 | 34 |
| 2023 Q1 | 29,693,376 | $237,250,217 | -$9,782,816 | $7.99 | 29 |
| 2022 Q4 | 30,892,511 | $299,454,602 | -$7,759,406 | $9.72 | 32 |
| 2022 Q3 | 31,599,032 | $367,179,200 | -$9,454,337 | $11.62 | 33 |
| 2022 Q2 | 32,559,951 | $324,989,656 | +$3,737,200 | $9.98 | 33 |
| 2022 Q1 | 32,084,312 | $586,822,000 | +$37,199,278 | $18.29 | 30 |
| 2021 Q4 | 30,046,921 | $700,993,000 | +$26,953,821 | $23.33 | 29 |
| 2021 Q3 | 28,509,902 | $625,158,000 | +$21,272,275 | $22.06 | 29 |
| 2021 Q2 | 27,592,126 | $593,693,000 | +$593,693,000 | $21.73 | 34 |