X0206 3 2018-10-18 0 0001664106 LogicBio Therapeutics, Inc. LOGC 0001752537 Kay Mark A C/O LOGICBIO THERAPEUTICS, INC. 610 MAIN STREET, 3RD FLOOR CAMBRIDGE MA 02139 1 0 0 0 Common Stock 776794 D Option to Purchase Common Stock 0.73 2027-11-02 Common Stock 140615 D Option to Purchase Common Stock 0.73 2028-01-31 Common Stock 13089 D The option vested upon grant on November 2, 2017. The option vests 25% on the first anniversary of the grant date, January 31, 2018, and in equal one thirty-sixth monthly installments thereafter. Exhibit List Exhibit 24 - Power of Attorney /s/ Matthias Jaffe, as Attorney-In-Fact 2018-10-18