RTW Investments Reports 9.9% Stake in COMPASS Pathways plc

On May 15, 2026, RTW Investments, LP and Roderick Wong, M.D. filed a Schedule 13G/A reporting a significant stake in COMPASS Pathways plc (CMPS). The filing indicates that the reporting persons beneficially own 12,971,571 ordinary shares, representing a 9.9% ownership stake in the company. This position includes the assumed exercise of warrants to purchase 2,339,181 shares. RTW Investments, acting as an investment adviser to various RTW Funds, and Dr. Wong, as Managing Partner and Chief Investment Officer, share voting and dispositive power over these shares. The filing marks a notable increase from the previously reported 0.0% ownership, reflecting a substantial new investment position as of the March 31, 2026 event date. The reporting persons certified that the securities were acquired in the ordinary course of business and not for the purpose of influencing or changing the control of the issuer.