Initial Statement of Beneficial Ownership

This filing reports the initial statement of beneficial ownership for ELI LILLY & Co concerning TRex Bio, Inc. (TRXB). The reporting person, ELI LILLY & Co, is a ten percent owner. The filing details 5,480,872 shares of Common Stock following a transaction. These shares include 4,605,872 shares issuable upon mandatory conversion of convertible preferred stock and 875,000 shares being purchased in the Issuer's initial public offering. The direct ownership of these securities is indicated.