Collaboration, License and Option Agreements	6 Months Ended
Jun. 30, 2023
Collaboration License And Option Agreements [Abstract]
Collaboration, License and Option Agreements	7. Collaboration, License and Option Agreements BeiGene In April 2019, the Company entered into a Global Co-Development and Collaboration agreement (the “BeiGene Collaboration”) with BeiGene, Ltd. and BeiGene Switzerland GmbH (collectively “BeiGene”), for the development, manufacturing and commercialization of the Company’s investigational CAB CTLA-4 antibody (BA3071). The BeiGene Collaboration was amended several times between 2019 and 2021 and the Company received a total of $25.0 million in non-refundable payments from BeiGene during that time. In November 2021, the BeiGene Collaboration was terminated, subject to survival of certain provisions, and BeiGene handed back rights to know-how and materials received under the amended BeiGene Collaboration. As a result, the Company is responsible for the global development and commercialization of BA3071. As consideration for this amendment, the Company agreed to pay BeiGene mid-single digit royalties on sales worldwide and on a limited basis will share in any upfront and milestone payments received through a sublicense of BA3071. The Company reclassified its then remaining $19.8 million of deferred revenue as a long-term liability which is expected to settle as licensing payments are made to BeiGene in accordance with the resulting amendment. In the event the license is terminated, the liability will be extinguished with no further payment to BeiGene. For the three and six months ended June 30, 2023 and 2022, the Company did not recognize any revenue related to the collaboration agreement with BeiGene. The Company had a $19.8 million liability to licensor as of June 30, 2023 and December 31, 2022. Service Contracts Prior to developing its own programs, the Company entered into various fixed price research service contracts. In connection with these service contracts, the Company may receive future milestone payments if certain clinical, regulatory and commercialization milestones are achieved. The Company is also eligible to receive royalties based on certain product sales. The Company did not recognize any revenue related to its legacy service contracts during the three and six months ended June 30, 2023 or 2022. BMS Collaboration In January 2022, the Company and Bristol-Myers Squibb Company (“BMS”) entered into a clinical trial collaboration and supply agreement (the “BMS Agreement”). Under the terms of the BMS Agreement, BioAtla and BMS will collaborate on clinical trials of separate combination therapies using two of BioAtla’s Conditionally Active Biologic Antibody Drug Conjugates, BA3011 and BA3021, each in combination with Opdivo® (nivolumab), BMS’ proprietary anti-PD-1 monoclonal antibody product. The Company will serve as the study sponsor of the scheduled studies and will be responsible for costs associated with the trial execution. BMS will provide Opdivo® clinical drug supply at no cost for the combination study trials. After the completion of the combination therapy trials, the Company is obligated to provide BMS with a final report of the data resulting from the trial. The BMS Agreement was amended in October 2022 to include additional territories for our BA3011 and BA3021 combination study trials. There was no impact to the Company's financial results for the three and six months ended June 30, 2023 and 2022 as a result of this agreement.

Collaboration, License and Option Agreements

6 Months Ended

Jun. 30, 2023

Collaboration License And Option Agreements [Abstract]

Collaboration, License and Option Agreements

7. Collaboration, License and Option Agreements

BeiGene

In April 2019, the Company entered into a Global Co-Development and Collaboration agreement (the “BeiGene Collaboration”) with BeiGene, Ltd. and BeiGene Switzerland GmbH (collectively “BeiGene”), for the development, manufacturing and commercialization of the Company’s investigational CAB CTLA-4 antibody (BA3071). The BeiGene Collaboration was amended several times between 2019 and 2021 and the Company received a total of $25.0 million in non-refundable payments from BeiGene during that time.

In November 2021, the BeiGene Collaboration was terminated, subject to survival of certain provisions, and BeiGene handed back rights to know-how and materials received under the amended BeiGene Collaboration. As a result, the Company is responsible for the global development and commercialization of BA3071. As consideration for this amendment, the Company agreed to pay BeiGene mid-single digit royalties on sales worldwide and on a limited basis will share in any upfront and milestone payments received through a sublicense of BA3071. The Company reclassified its then remaining $19.8 million of deferred revenue as a long-term liability which is expected to settle as licensing payments are made to BeiGene in accordance with the resulting amendment. In the event the license is terminated, the liability will be extinguished with no further payment to BeiGene.

For the three and six months ended June 30, 2023 and 2022, the Company did not recognize any revenue related to the collaboration agreement with BeiGene. The Company had a $19.8 million liability to licensor as of June 30, 2023 and December 31, 2022.

Service Contracts

Prior to developing its own programs, the Company entered into various fixed price research service contracts. In connection with these service contracts, the Company may receive future milestone payments if certain clinical, regulatory and commercialization milestones are achieved. The Company is also eligible to receive royalties based on certain product sales. The Company did not recognize any revenue related to its legacy service contracts during the three and six months ended June 30, 2023 or 2022.

BMS Collaboration

In January 2022, the Company and Bristol-Myers Squibb Company (“BMS”) entered into a clinical trial collaboration and supply agreement (the “BMS Agreement”). Under the terms of the BMS Agreement, BioAtla and BMS will collaborate on clinical trials of separate combination therapies using two of BioAtla’s Conditionally Active Biologic Antibody Drug Conjugates, BA3011 and BA3021, each in combination with Opdivo® (nivolumab), BMS’ proprietary anti-PD-1 monoclonal antibody product. The Company will serve as the study sponsor of the scheduled studies and will be responsible for costs associated with the trial execution. BMS will provide Opdivo® clinical drug supply at no cost for the combination study trials. After the completion of the combination therapy trials, the Company is obligated to provide BMS with a final report of the data resulting from the trial. The BMS Agreement

was amended in October 2022 to include additional territories for our BA3011 and BA3021 combination study trials. There was no impact to the Company's financial results for the three and six months ended June 30, 2023 and 2022 as a result of this agreement.