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Revenues | 3 Months Ended
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Mar. 31, 2026
Revenue from Contract with Customer [Abstract] |
Revenues | Revenues The following table summarizes our revenues by collaboration, category of revenue, and the method of recognition (in millions):
|  |  |  |  |  |  | Three Months Ended March 31,
| Over time |  | Point in time |  |  |  |  |  | 2026 |  | 2025
Gilead Collaboration |  |  |  |  |  |  |  |  |  |  |
License and development services | * |  |  |  |  |  |  |  | $ | 8 |  |  | $ | 20 |
R&D services | * |  |  |  |  |  |  |  | 2 |  |  | 2 |
Access rights | * |  |  |  |  |  |  |  | 3 |  |  | 6 |
Other |  |  | * |  |  |  |  |  | 2 |  |  | — |
Taiho Collaboration |  |  |  |  |  |  |  |  |  |  |
License | * |  |  |  |  |  |  |  | 2 |  |  | — |
Total revenues |  |  |  |  |  |  |  |  | $ | 17 |  |  | $ | 28 |
Total revenues from collaborations |  |  |  |  |  |  |  |  | $ | 10 |  |  | $ | 20 |
Total revenues from a customer |  |  |  |  |  |  |  |  | $ | 7 |  |  | $ | 8 |
Revenues from Gilead accounted for 88% and 100% of Total revenues for the three months ended March 31, 2026 and 2025, respectively. The following table summarizes the revenue recognized as a result of changes in the deferred revenue balance (in millions):
|  |  | Three Months Ended March 31,
|  |  |  |  | 2026 |  | 2025
Revenue recognized from amounts in deferred revenue at the beginning of the period |  |  |  |  | $ | 17 |  |  | $ | 28 |
We had $79 million and $78 million of deferred revenue remaining on our Condensed Consolidated Balance Sheets at March 31, 2026 and December 31, 2025, respectively, allocated between current and noncurrent based on the expected timing of future recognition. Revenue from the Gilead Collaboration 2025 Termination of rights to etrumadenant In the second quarter 2025, Gilead terminated its rights to etrumadenant (the adenosine receptor antagonist program), which we determined was a significant reduction in the scope of the arrangement, which met the accounting definition of a contract modification and we accounted for this as both a modification of the existing contract and the creation of a new contract. Under the applicable accounting rules for such contract modifications, we did not adjust the accounting for completed performance obligations that were distinct from the modified goods or services. Accordingly, we allocated the updated transaction price of $256 million, which was comprised of the deferred revenue remaining as of the modification date, to the remaining unsatisfied and partially satisfied performance obligations and updated the measure of progress as of the modification date, which resulted in a cumulative catch-up to revenue of $143 million for the quarter ended June 30, 2025. The following table summarizes the allocation of the updated transaction price to the remaining unsatisfied and partially satisfied performance obligations (in millions):
Allocation to performance obligations |  | Distinct |  | Combined |  | Amount
License and development services |  |  |  | * |  | $ | 192 |
Development services |  | * |  |  |  | 17 |
Access right and option continuation periods |  | * |  |  |  | 30 |
Rights to certain studies |  | * |  |  |  | 17 |
Total transaction price |  |  |  |  |  | $ | 256 |
We accounted for each performance obligation as follows: License and Development Services - Etrumadenant, Quemliclustat and Domvanalimab Under the Gilead Collaboration Agreement, Gilead obtained options to the exclusive rights: to our adenosine receptor antagonist program, etrumadenant; to our CD73 program, quemliclustat; and to our anti-TIGIT program, domvanalimab and AB308. Effective December 2021, under the First Gilead Collaboration Agreement Amendment, Gilead exercised these options and obtained exclusive licenses to these programs for a total non-refundable payment totaling $725 million. We determined the standalone selling price of each license using a discounted cash flow method and the R&D services for each program, using an expected cost-plus margin approach. For domvanalimab, we determined that the license was distinct based on an evaluation of the delivery of the license, noting that the program was in the later stages of development and the ongoing R&D services do not significantly modify or customize the related intellectual property. Accordingly, we recognized the allocated transaction price as revenue in the year ended December 31, 2021. For etrumadenant and quemliclustat programs, we determined that the license and R&D services were combined at the inception of the agreement based on an evaluation of the delivery of the license, due to the early stage of the technology and the specialized nature of our know-how. We recognize the amounts allocated to R&D services for domvanalimab and the combined license and R&D for etrumadenant and quemliclustat as each performance obligation is satisfied, calculated as an estimated percentage of completion based on management's estimated total effort for each program. For the three months ended March 31, 2026 and 2025, we recognized revenue of $8 million and $20 million, respectively, within License and development services revenue in our Condensed Consolidated Statements of Operations. Access Rights and Option Continuation Periods Under the Gilead Collaboration Agreement entered into in 2020 and related amendments, Gilead has exclusive access to our current programs as well as any future programs for a period of ten years, contingent upon option continuation payments totaling $300 million, consisting of a $100 million payment on each of the fourth (paid in third quarter 2024), sixth, and eighth anniversaries of the Gilead Collaboration Agreement. Following Gilead’s decision to not make the option continuation payment due on the sixth anniversary, on July 14, 2026, Gilead will lose certain rights to access and obtain licenses to the programs arising from our R&D pipeline. The standalone selling price of the ongoing R&D pipeline access and the option continuation material rights were determined using an expected cost-plus margin approach, with the option continuation material rights probability-adjusted for the likelihood of exercise. We use a time-elapsed input method to measure progress toward satisfying the access rights performance obligation, which is the method we believe most faithfully depicts our performance in transferring the promised services during the time period in which Gilead has access to our R&D pipeline. Accordingly, the revenue allocated to the initial four-year access rights performance obligation was recognized using this input method over the remaining period through July 2024, and for the fourth anniversary access rights continuation, over the two-year period commencing July 2024. For the option continuation material rights, following Gilead's decision in April 2026 to not make the continuation payment, we will recognize the $18 million of revenue allocated to those material rights. For the three months ended March 31, 2026 and 2025, we recognized revenue of $3 million and $6 million, respectively, within Other collaboration revenue in our Condensed Consolidated Statements of Operations. Rights to Certain Studies Effective January 2024, under the Third Gilead Collaboration Agreement Amendment, we will solely fund certain studies, but Gilead retains exclusive rights to reinstate into the collaboration each study beginning at specified time-points for a payment amount based on the cost incurred. We have determined that these are material rights and we estimated the standalone selling price of these performance obligations using a discounted cash flow method probability-adjusted for the likelihood of exercise. We recognize the amount allocated to each right if and when the related study is reinstated into the parties' co-development plans or if the option effectively lapses. For the three months ended March 31, 2026, we recognized revenue of $2 million within License and development services revenue in our Condensed Consolidated Statements of Operations. As of March 31, 2026, we had $14 million of deferred revenue on our Condensed Consolidated Balance Sheet related to these performance obligations. R&D Services - Inflammation Programs In 2023, we entered into the Second Gilead Collaboration Agreement Amendment pursuant to which we expanded our collaboration to provide Gilead with options to license two jointly selected research-stage programs that target inflammatory diseases for which we will lead discovery and early development activities, see Note 3, Related party - Gilead Sciences, Inc., for more information. We received a total upfront payment of $35 million. We determined that the Second Gilead Collaboration Agreement Amendment represented a separate contract. We determined that we have two separate distinct performance obligations to perform R&D services for Gilead related to discovery and early development activities for each research program for which they have made an upfront payment and, at the amendment closing date, we allocated the transaction price of $35 million equally to the two performance obligations created by this amendment based upon the respective standalone selling prices. The standalone selling prices of these obligations were determined using an expected cost-plus margin approach. We recognize the amounts allocated to these services as the performance obligation is satisfied, calculated as an estimated percentage of completion based on management's estimated total effort for the program. The options to acquire additional licenses or services did not result in additional performance obligations because they did not provide a material right at contract inception, primarily due to the very early stages of the programs. For the three months ended March 31, 2026 and 2025, we recognized revenue of $2 million and $2 million, respectively, within Other collaboration revenue in our Condensed Consolidated Statements of Operations. Revenue from the Taiho Collaboration Casdatifan In the fourth quarter 2025, Taiho exercised its option under the collaboration arrangement and obtained an exclusive license to casdatifan (the HIF-2α inhibitor) for the Taiho Territory and concurrently entered into the second amendment whereby we will lead development for two indications in Japan including the global Phase 3 trial of casdatifan PEAK-1. In exchange, Taiho made an option exercise payment of $15 million which was received in fourth quarter 2025. We determined that the option exercise and amendment represented a single contract under which we have two separate distinct performance obligations, a license with a customer and R&D services for a collaborative partner related to the global study activities. The following table summarizes the allocation of the transaction price of $15 million to the performance obligations (in millions):
Allocation to performance obligations |  | Distinct |  | Combined |  | Amount
License |  | * |  |  |  | $ | 7 |
R&D services |  | * |  |  |  | 8 |
Total transaction price |  |  |  |  |  | $ | 15 |
We determined that the license for casdatifan was distinct based on an evaluation of the delivery of the license, noting that the program was in the later stages of development and the ongoing R&D services do not significantly modify or customize the related intellectual property. We determined the standalone selling price of this license using a discounted cash flow method. We recognized as revenue the allocated transaction price of $7 million in the fourth quarter 2025, within License and development services revenue in our Condensed Consolidated Statements of Operations. The standalone selling price of the R&D services obligation was determined using an expected cost-plus margin approach. We recognize the amounts allocated to these services as the performance obligation is satisfied, calculated as an estimated percentage of completion based on management's estimated total effort for the program. We determined that these services are with a collaborative partner and not a customer and in accordance with our policy recognize these amounts as R&D expense reimbursements. See Note 4, License and collaborations, for more information. License For the three months ended March 31, 2026, we recognized revenue of $2 million within License and development services revenue in our Condensed Consolidated Statements of Operations related to programs optioned by Taiho.

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-9 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-10 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-15 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-12 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-13 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Topic 606 -Publisher FASB -URI https://asc.fasb.org/606/tableOfContent + Details
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