GH Research PLC
GHRS- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001855129
No open-market purchases or sales by GH Research PLC insiders were filed in the last 90 days; 63 institutions reported holding it in 13F filings for Q2 2026, worth $1.38B in total; no superinvestor holds it.
Holders of 5% or more of GHRS
Holders whose latest Schedule 13D or 13G filing reports 5% or more of GH Research PLC, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Lynx1 Capital Management LP | 13G/A | 19.30%13.3M shares | +1.90 ppfrom 17.40% | Feb 16, 20249 filings | Aug 14, 2026 | SEC |
| Biotechnology Value Fund L P | 13G/A | 14.20%8.83M shares | – | Feb 14, 20223 filings | May 15, 2025 | SEC |
| RTW Investments, LP | 13G/A | 8.90%5.50M shares | – | Feb 14, 20242 filings | May 15, 2025 | SEC |
| FMR LLC | 13G/A | 8.20%5.09M shares | +1.30 ppfrom 6.90% | Feb 9, 20227 filings | Aug 6, 2025 | SEC |
| Ra Capital Management, L.P. | 13G/A | 7.10%4.90M shares | −5.30 ppfrom 12.40% | Jul 9, 20219 filings | Aug 14, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
39 Schedule 13D and 13G filings on GH Research PLC, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Aug 14, 20266:38 PM ET | Ra Capital Management, L.P.and 3 others | 13G/A | 7.10%4.90M shares | −5.30 ppfrom 12.40% | Aug 12, 2026 | SEC |
| Aug 14, 20264:30 PM ET | Lynx1 Capital Management LPand 1 other | 13G/A | 19.30%13.3M shares | +1.90 ppfrom 17.40% | Jun 30, 2026 | SEC |
| May 18, 20269:30 PM ET | Lynx1 Capital Management LPand 1 other | 13G/A | 17.40%10.8M shares | +2.20 ppfrom 15.20% | Mar 31, 2026 | SEC |
| May 15, 20264:30 PM ET | Lynx1 Capital Management LPand 1 other | 13G/A | 15.20%9.46M shares | −1.60 ppfrom 16.80% | Mar 31, 2026 | SEC |
| Feb 17, 20261:45 PM ET | Lynx1 Capital Management LPand 1 other | 13G/A | 16.80%10.4M shares | +2.90 ppfrom 13.90% | Dec 31, 2025 | SEC |
| Nov 14, 20254:13 PM ET | Terwey Theis H | 13G/A | 2.90%1.78M shares | −4.70 ppfrom 7.60%Below 5% | Sep 30, 2025 | SEC |
| Nov 14, 20252:01 PM ET | Lynx1 Capital Management LPand 1 other | 13G/A | 13.90%8.60M shares | +3.70 ppfrom 10.20% | Sep 30, 2025 | SEC |
| Aug 14, 20256:01 PM ET | Ra Capital Management, L.P.and 3 others | 13G/A | 12.40%7.68M shares | +1.20 ppfrom 11.20% | Jun 30, 2025 | SEC |
| Aug 14, 20257:19 AM ET | Terwey Theis H | 13G/A | 7.60%4.69M shares | – | Jun 30, 2025 | SEC |
| Aug 6, 202512:01 PM ET | FMR LLCand 1 other | 13G/A | 8.20%5.09M shares | +1.30 ppfrom 6.90% | Jun 30, 2025 | SEC |
| May 15, 20254:58 PM ET | Ra Capital Management, L.P.and 3 others | 13G/A | 11.20%6.94M shares | – | Mar 31, 2025 | SEC |
| May 15, 20254:31 PM ET | Biotechnology Value Fund L Pand 9 others | 13G/A | 14.20%8.83M shares | – | Mar 31, 2025 | SEC |
| May 15, 20258:26 AM ET | RTW Investments, LPand 1 other | 13G/A | 8.90%5.50M shares | – | Mar 31, 2025 | SEC |
| May 12, 202510:32 AM ET | FMR LLCand 1 other | 13G | 6.90%4.25M shares | +2.10 ppfrom 4.80% | Mar 31, 2025 | SEC |
| Feb 12, 20259:19 AM ET | FMR LLCand 1 other | 13G/A | 4.80%2.49M shares | –Below 5% | Dec 31, 2024 | SEC |
| Feb 10, 20255:29 PM ET | Lynx1 Capital Management LPand 1 other | 13G/A | 10.20%6.35M shares | +0.90 ppfrom 9.30% | Feb 6, 2025 | SEC |
| Feb 10, 20255:22 PM ET | Lynx1 Capital Management LPand 1 other | 13G/A | 9.30%4.86M shares | – | Dec 31, 2024 | SEC |
| Nov 14, 2024 | Ra Capital Management, L.P. | 13G/AOld format | – | – | – | SEC |
| Nov 14, 2024 | Lynx1 Capital Management LP | 13G/AOld format | – | – | – | SEC |
| Feb 16, 2024 | Lynx1 Capital Management LP | 13GOld format | – | New | – | SEC |
| Feb 14, 2024 | Venrock Healthcare Capital Partners II, L.P. | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2024 | Ra Capital Management, L.P. | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2024 | Biotechnology Value Fund L P | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2024 | RTW Investments, LP | 13GOld format | – | New | – | SEC |
| Feb 9, 2024 | FMR LLC | 13G/AOld format | – | – | – | SEC |
| Mar 30, 2023 | Ra Capital Management, L.P. | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2023 | Ra Capital Management, L.P. | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2023 | Venrock Healthcare Capital Partners II, L.P. | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2023 | Schonharting Florian | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2023 | Terwey Theis H | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2023 | FMR LLC | 13G/AOld format | – | – | – | SEC |
| May 27, 2022 | Venrock Healthcare Capital Partners II, L.P. | 13GOld format | – | New | – | SEC |
| Apr 11, 2022 | FMR LLC | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2022 | Ra Capital Management, L.P. | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2022 | Biotechnology Value Fund L P | 13GOld format | – | New | – | SEC |
| Feb 9, 2022 | Schonharting Florian | 13GOld format | – | New | – | SEC |
| Feb 9, 2022 | Terwey Theis H | 13GOld format | – | New | – | SEC |
| Feb 9, 2022 | FMR LLC | 13GOld format | – | New | – | SEC |
| Jul 9, 2021 | Ra Capital Management, L.P. | 13GOld format | – | New | – | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell GH Research PLC shares.
No Form 144 notices for GH Research PLC are on file.