X0607 3 2026-03-18 0 0001855129 GH Research PLC GHRS 0002126830 Halle Magnus Clemensen true C/O GH RESEARCH PLC, JOSHUA DAWSON HOUSE DAWSON STREET DUBLIN IRELAND L2 D02 RY95 IRELAND true Managing Director, Ireland Ordinary Shares 118354 D Share Options (Right to Buy) 0.025 2030-04-27 Ordinary Shares 17500 D Share Options (Right to Buy) 0.025 2031-11-25 Ordinary Shares 150000 D Share Options (Right to Buy) 0.025 2032-05-16 Ordinary Shares 50000 D The share options vested as to 25% on April 27, 2024, and the remaining share options vest in equal monthly installments for three years thereafter. The share options vested as to 25% on November 25, 2025, and the remaining share options vest in equal monthly installments for three years thereafter. The share options vest as to 25% on May 16, 2026, and the remaining share options vest in equal monthly installments for three years thereafter. /s/ Magnus Halle 2026-04-01