Ownership Filing for GH Research PLC

This filing details the ownership of GH Research PLC by Dermot John Hanley, who is a director of the company. As of March 18, 2026, Hanley directly owns 2,432 ordinary shares. The filing also discloses various share options granted to Hanley, with exercise prices of $0.025. These options have different vesting and expiration dates, with some exercisable between the second and seventh anniversary of their grant dates and one with a vesting schedule starting December 9, 2025. Additionally, a power of attorney document is included, authorizing specific individuals to act on Hanley's behalf for SEC filings, including Forms 3, 4, and 5, as well as Form 144 filings related to potential sales of common stock. This power of attorney also covers the management of Hanley's EDGAR account.