X0306 4 2017-11-16 0 0001497253 ORGANOVO HOLDINGS, INC. ONVO 0001621152 Bush Jennifer 6275 NANCY RIDGE DRIVE, SUITE 110 SAN DIEGO CA 92121 0 1 0 0 General Counsel & Secretary Common Stock 2017-11-16 4 F 0 8900 1.4702 D 255180 D Represents the mandatory sale of shares to satisfy the Reporting Person's tax withholding obligations, in connection with the partial vesting and settlement of restricted stock units granted in July 2016 and June 2017, pursuant to the Reporting Person's agreement with the Issuer. This number does not include 375,000 shares of common stock underlying outstanding options held by Ms. Bush; post-transaction Ms. Bush beneficially owns or has a right to acquire 630,180 shares of common stock. /s/ Jennifer Bush 2017-11-16