SCHEDULE 13G/A: RTW Investments and Roderick Wong Disclose 8.9% Stake in GH Research PLC

RTW Investments, LP and its Managing Partner, Roderick Wong, M.D., have filed an amended Schedule 13G disclosing a shared beneficial ownership of 8.9% in GH Research PLC's ordinary shares.

Summary

• RTW Investments, LP, a Delaware limited partnership and investment adviser, along with Roderick Wong, M.D., its Managing Partner and Chief Investment Officer, are the reporting persons.
• The filing is an Amendment No. 1 to Schedule 13G, indicating a previous filing existed.
• The reporting persons collectively beneficially own 5,499,769 ordinary shares of GH Research PLC.
• This ownership represents 8.9% of the total class of ordinary shares outstanding.
• The percentage is calculated based on 62,028,145 shares outstanding as of February 15, 2025, as reported in the Company's Annual Report on Form 20-F.
• Both RTW Investments, LP and Roderick Wong, M.D. have shared voting power and shared dispositive power over all 5,499,769 shares.
• The shares were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing the control of GH Research PLC.

Sentiment

Score: 5

Explanation: The document is a factual disclosure of beneficial ownership and does not convey positive or negative sentiment regarding the company's performance or prospects.

Risks

• The document does not detail specific company risks beyond the disclosure of beneficial ownership.

Future Outlook

This Schedule 13G filing does not contain any forward-looking statements or guidance regarding the issuer's future outlook.

Industry Context

This filing is a standard disclosure of significant beneficial ownership by an investment firm and its principal, indicating a passive investment stake in a publicly traded company within the pharmaceutical or biotechnology sector (GH Research PLC). It reflects a common practice for institutional investors to disclose their holdings once they cross certain thresholds, providing transparency to the market.

Stakeholder Impact

• Shareholders: Provides transparency regarding significant institutional ownership, which can influence market perception and liquidity.
• Regulatory Authorities: Fulfills SEC disclosure requirements for beneficial ownership, ensuring market transparency and compliance.

Key Dates

Keywords

Schedule 13G, beneficial ownership, GH Research PLC, RTW Investments, Roderick Wong, investment adviser, ordinary shares, SEC filing