Boundless Bio Announces Early Termination of San Diego Laboratory and Office Lease

On April 13, 2026, Boundless Bio, Inc. entered into an Agreement for Termination of Lease and Voluntary Surrender of Premises with ARE-10933 North Torrey Pines, LLC. This agreement terminates the lease for the company’s laboratory and office space located at 10955 Alexandria Way in San Diego, California, which consists of approximately 80,168 rentable square feet. The lease was originally scheduled to expire on October 31, 2034, but will now terminate effective May 31, 2026. As consideration for the early termination, Boundless Bio has agreed to pay the landlord a lease modification fee of $10.0 million. Additionally, the landlord will draw down and retain the company’s full security deposit of approximately $0.5 million. The termination was contingent upon the landlord securing a new tenant for the premises, a condition that has already been satisfied. This move represents a significant change in the company's long-term facility obligations and current financial liabilities.