On June 5, 2024, AlloVir, Inc. (the ?Company?) entered into a Termination of Sublease Agreement (the ?Sublease Termination Agreement?) with AMAG Pharmaceuticals, Inc., a Delaware corporation (the ?Tenant?), in connection with the termination (the ?Lease Termination?) of the Sublease Agreement, dated September 8, 2021, by and between the Company, as subtenant, and the Tenant (the ?Sublease Agreement?), for the premises located at 1100 Winter Street, Waltham, Massachusetts, 02451 (the ?Premises?). Pursuant to the Sublease Termination Agreement, the Company and the Tenant agreed to terminate the Sublease Agreement, effective as of 5:00 p.m. Eastern Time on June 30, 2024 (the ?Effective Termination Date?), subject to the approval of BP Bay Colony LLC, the landlord of the Premises, which was received June 5, 2024, and other terms and conditions therein. The Sublease Termination Agreement provides that the Company shall surrender the Premises on or prior to the Effective Termination Date and shall have no further rent obligations after the Effective Termination Date.

As consideration for the Tenant?s agreement to terminate the Sublease Agreement as of the Effective Termination Date, the Company agreed to pay the Tenant a lease termination fee (the ?Lease Termination Fee?) of $5,700,000. The Lease Termination Fee shall be due on or about the date of the Sublease Termination Agreement.