Atara Biotherapeutics Inc

Our corporate headquarters are located in Thousand Oaks, California and consists of approximately 33,659 square feet of office space under a lease agreement that expires in February 2032. In February 2025, we moved our headquarters to Atara Research Center, our existing office, lab, and warehouse space at 1280 Rancho Conejo Blvd, Thousand Oaks, CA 91320 (ARC).

The initial 10.5-year term of the ARC lease commenced in August 2021. We have the option to extend this lease for two additional five-year periods after the initial term.

In November 2023, we entered into an amended lease agreement for our office and lab space in Aurora, Colorado, to extend the term of our lease agreement through April 2025.

In April 2022, we assigned our lease of approximately 90,580 square feet of office, lab and cellular therapy manufacturing space in Thousand Oaks, California, which expires in April 2033, to FDB as part of the Fujifilm Transaction. We remain joint and severally liable for obligations related to the assigned lease.

We lease office space in South San Francisco, California, under a non-cancellable lease agreement through May 2025. In October 2022, we entered into a sub-lease agreement with a third party for this office space. The sub-lease term commenced in November 2022 and expires in May 2025, with no option to extend the sub-lease term.

We use our leased spaces in Thousand Oaks, California and Aurora, Colorado for our translational and preclinical sciences, analytical development and process science functions. These facilities support our product pipeline and process development and leverage our allogeneic cell therapy platform to drive innovation. We believe our existing facilities are in good operating condition and suitable for the conduct of our business.