X0306 4 2022-06-17 0 0001664106 LogicBio Therapeutics, Inc. LOGC 0001752432 Chen Leon C/O LOGICBIO THERAPEUTICS, INC. 65 HAYDEN AVE, FLOOR 2 LEXINGTON MA 02421 1 0 0 0 Stock Option (right to buy) 0.38 2022-06-17 4 A 0 12500 0.00 A 2032-06-17 Common Stock 12500 12500 D The options were granted by LogicBio Therapeutics, Inc. (the "Company") pursuant to its 2018 Equity Incentive Plan, as provided under the Company's current non-employee director compensation policy. The options will vest in full on the earlier of (i) the first anniversary of the grant date, and (ii) the day prior to the Company's 2023 Annual Meeting of Stockholders, subject to the Reporting Person's continued service with the Company on the vesting date. /s/ Andrea Paul, as Attorney-in-Fact 2022-06-21