X0306 4 2021-05-25 0 0001754068 Allovir, Inc. ALVR 0001818068 Brenner Malcolm C/O ALLOVIR, INC. 139 MAIN STREET, SUITE 500 CAMBRIDGE MA 02142 1 0 0 0 Common Stock 2021-05-25 4 G 0 818663 0.00 D 0 I See Footnote Common Stock 163732 I See Footnote Stock Option (Right to Buy) 21.51 2021-05-25 4 A 0 22500 0.00 A 2031-05-24 Common Stock 22500 22500 D Shares held by Salt Free LP. On May 25, 2021, Salt Free LP distributed to its limited partners, pro rata and without consideration, 818,663 shares of the Issuer's common stock.The Reporting Person has a controlling interest in Salt Free LP and may be deemed to beneficially own these securities. The Reporting Person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose. Shares held by The Malcolm and Cliona Brenner Revocable Trust, of which the Reporting Person is a trustee and settlor. These shares were received in the distribution described in footnote (1) above. The Reporting Person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose. This option shall vest and become exercisable upon the earlier to occur of (i) May 25, 2022 and (ii) the next annual meeting of the Issuer's stockholders. /s/ Brett Hagen, as Attorney-in-Fact 2021-05-27