X0306 4 2020-07-29 0 0001754068 Allovir, Inc. ALVR 0001818802 Atillasoy Ercem C/O ALLOVIR, INC. 139 MAIN STREET, SUITE 500 CAMBRIDGE MA 02142 0 1 0 0 See Remarks Common Stock 2020-07-29 4 A 0 75000 0.00 A 75000 D Stock Option (Right to Buy) 17.00 2020-07-29 4 A 0 407400 0.00 A 2030-07-29 Common Stock 407400 407400 D The shares reported in this transaction represent Restricted Stock Units ("RSUs") issued under the AlloVir, Inc. 2020 Stock Option and Grant Plan (the "Plan"). Each RSU represents the contingent right to receive one share of the Issuer's Common Stock. 25% of the RSUs shall vest on July 20, 2021, with the remainder vesting in twelve equal quarterly installments thereafter. In the event of the Reporting Person's termination without cause or for good reason, the RSUs shall immediately vest in full. 25% of this option shall vest and become exercisable on July 20, 2021, with the remainder vesting in twelve equal quarterly installments thereafter. Officer Title: Chief Regulatory and Safety Officer /s/ Brett Hagen, as Attorney-in-Fact 2020-07-31