Collaboration Agreements	9 Months Ended
Sep. 30, 2023
Collaboration Agreements
Collaboration Agreements	6. Collaboration Agreements In July 2023, the Company and F. Hoffmann-La Roche Ltd. (“Roche”) entered into a clinical trial collaboration (the “Roche Clinical Collaboration”) pursuant to a clinical supply agreement to evaluate XTX101 in combination with atezolizumab (Tecentriq®) in a Phase 1/2 clinical trial consisting of a Phase 1 dose escalation portion assessing the combination in patients with advanced solid tumors and a Phase 2 portion assessing the combination in patients with microsatellite stable colorectal cancer. Under the clinical supply agreement, the Company is eligible to receive specified cost-sharing payments from Roche, and each company will supply its respective anti-cancer agent to support the Phase 1/2 clinical trial. The Company will sponsor and conduct the Phase 1/2 clinical trial and retains global development and commercialization rights to XTX101. The Company concluded that the cost-sharing payments from the Roche Clinical Collaboration are not in the scope of ASC 606 because the Company does not consider performing research and development services for reimbursement to be part of its ongoing major or central operations. Therefore, the Company applied a reasonable, rational, and consistently applied accounting policy election to record the cost-sharing payments from the Roche Clinical Collaboration as a reduction of research and development expenses in the condensed consolidated statements of operations and comprehensive loss for the period in which a study development event is achieved. During the three and nine months ended September 30, 2023, the Company recognized a reduction of research and development expenses of $2.0 million. As of September 30, 2023, $2.0 million of earned but unpaid cost-sharing payments were included in prepaid expenses and other current assets of the Company’s condensed consolidated balance sheets.

Collaboration Agreements

9 Months Ended

Sep. 30, 2023

6. Collaboration Agreements

In July 2023, the Company and F. Hoffmann-La Roche Ltd. (“Roche”) entered into a clinical trial collaboration (the “Roche Clinical Collaboration”) pursuant to a clinical supply agreement to evaluate XTX101 in combination with atezolizumab (Tecentriq®) in a Phase 1/2 clinical trial consisting of a Phase 1 dose escalation portion assessing the combination in patients with advanced solid tumors and a Phase 2 portion assessing the combination in patients with microsatellite stable colorectal cancer.

Under the clinical supply agreement, the Company is eligible to receive specified cost-sharing payments from Roche, and each company will supply its respective anti-cancer agent to support the Phase 1/2 clinical trial. The Company will sponsor and conduct the Phase 1/2 clinical trial and retains global development and commercialization rights to XTX101.

The Company concluded that the cost-sharing payments from the Roche Clinical Collaboration are not in the scope of ASC 606 because the Company does not consider performing research and development services for reimbursement to be part of its ongoing major or central operations. Therefore, the Company applied a reasonable, rational, and consistently applied accounting policy election to record the cost-sharing payments from the Roche Clinical Collaboration as a reduction of research and development expenses in the condensed consolidated statements of operations and comprehensive loss for the period in which a study development event is achieved. During the three and nine months ended September 30, 2023, the Company recognized a reduction of research and development expenses of $2.0 million. As of September 30, 2023, $2.0 million of earned but unpaid cost-sharing payments were included in prepaid expenses and other current assets of the Company’s condensed consolidated balance sheets.