RTW Investments, LP Discloses New 5.2% Stake in Erasca, Inc. (ERAS)

On May 15, 2026, RTW Investments, LP and Roderick Wong, M.D. filed a Schedule 13G with the SEC, disclosing a new 5.2% ownership stake in Erasca, Inc. (ERAS). The filing indicates that the reporting persons collectively hold 16,157,175 shares of common stock as of the event date of March 31, 2026. This position represents a significant increase from their previously reported 0% holding. RTW Investments, LP acts as the investment adviser to certain funds that directly hold the shares, while Dr. Wong serves as the Managing Partner and Chief Investment Officer. The shares are held for investment purposes in the ordinary course of business, with no intent to influence or change the control of the issuer. Both reporting persons share voting and dispositive power over the reported shares. This filing establishes RTW Investments as a passive institutional investor in the San Diego-based clinical-stage precision oncology company.