X0206 3 2018-10-18 0 0001664106 LogicBio Therapeutics, Inc. LOGC 0001752965 O'Connell Daniel P C/O LOGICBIO THERAPEUTICS, INC. 610 MAIN ST., 3RD FLOOR CAMBRIDGE 02139 1 0 0 0 Series B Convertible Preferred Stock Common Stock 2279023 I See Footnote Series B Convertible Preferred Stock is convertible into shares of common stock at any time at the holder's election and automatically upon the consummation of a qualified public offering of the registrant. There is no expiration date for the Series B Convertible Preferred Stock. The Reporting Person is an investment manager of Arix Bioscience, Inc. Arix Bioscience, Inc. and Arix Bioscience Holdings Limited, the direct beneficial owner of these securities, are each wholly owned subsidiaries of Arix Bioscience plc. The Reporting Person disclaims beneficial ownership, within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise of such portion of these securities in which the Reporting Person has no pecuniary interest. Exhibit List Exhibit 24 - Power of Attorney /s/ Matthias Jaffe, as Attorney-In-Fact 2018-10-18