Larimar Therapeutics, Inc.

We are party to an operating lease for approximately 3,927 square feet of laboratory space in King of Prussia, PA. We believe the lab space is sufficient for our needs for the next several years.

We are party to an operating lease for approximately 8,104 square feet of office space in Bala Cynwyd, Pennsylvania that serves as our corporate office. On November 24, 2025, we entered into a lease for an additional 7,107 square footage of office space through January 31, 2030 at our Bala Cynwyd Pennsylvania location and extended the term of all our other Bala Cynwyd space through January 31, 2030. We expect to occupy the additional 7,107 of additional office space when renovations are complete, which is expected to be around April 1, 2026.

We are party to an operating lease for approximately 17,705 square feet of office space in Boston, Massachusetts. This lease expires in October 2029. On October 27, 2020, we entered into a sublease agreement whereby we subleased all 17,705 square feet of office space leased under the Boston Lease until October 2029.