SCHEDULE 13G/A

GH RESEARCH PLC

Ordinary Shares, Nominal value of $0.025 per share · CUSIP: G3855L106

Event date: 2025-06-30

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• RA Capital Management, L.P.

  Shares: 7,676,697.00 · Class: 12.4%

• Peter Kolchinsky

  Shares: 7,676,697.00 · Class: 12.4%

• Rajeev Shah

  Shares: 7,676,697.00 · Class: 12.4%

• RA Capital Healthcare Fund, L.P.

  Shares: 7,485,080.00 · Class: 12.1%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.