Viridian Therapeutics IncDE

We are party to a multi-year, non-cancelable lease agreement for our office space in Waltham, Massachusetts (the “Original Lease”). In July 2021, we entered into an amendment to the Original Lease to increase our Massachusetts-based office space (the “First Amendment”). In April 2022, we entered into a second amendment to the Original Lease (the “Second Amendment”). The Second Amendment made certain modifications to both the Original Lease and First Amendment, including (i) the addition of 2,432 square feet of office space in the same building (the “April 2022 Expansion Premises”), (ii) the termination of the 1,087 square feet of leased space under the Original Lease seven days after the delivery of the April 2022 Expansion Premises, which occurred in the fourth quarter of 2022, and (iii) the extension of the expiration date of the 3,284 square feet of leased space under the First Amendment from October 2024 through November 2026. Under the Second Amendment, we have the option to extend the lease term for an additional period of three years upon notice to the landlord. In July 2022, we entered into a third amendment to the Original Lease (the “Third Amendment”). The Third Amendment makes certain modifications to the Original Lease, including (i) the addition of 5,240 square feet of office space in the same building (the “July 2022 Expansion Premises”), (ii) the termination of the 1,087 square feet of leased space under the Original Lease, and (iii) the extension of the expiration date of the 3,284 square feet of leased space under the First Amendment to April 2027. Under the Third Amendment, we have the option to extend the lease term for an additional period of three years upon notice to the landlord.

Additionally, we lease approximately 27,128 sq. ft. of office and laboratory space in Boulder, Colorado under a lease that expires in December 2024, subject to two three-year renewal options prior to the expiration, and that includes rent escalation clauses through the lease term.