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Collaboration Agreements | 6 Months Ended
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Jun. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Collaboration Agreements | Collaboration Agreements Biogen In October 2020, the Company entered into a Definitive Collaboration and License Agreement (“LRRK2 Agreement”), pursuant to which it granted Biogen a license to co-develop and co-commercialize its small molecule LRRK2 inhibitor program (the “LRRK2 Program”), and a Right of First Negotiation, Option and License Agreement (the “ROFN and Option Agreement”), pursuant to which it granted an option and right of first negotiation to certain of the Company's programs utilizing our TransportVehicle TM ("TV") platform, including its amyloid beta program (collectively the "Biogen Collaboration Agreement"), with Biogen Inc.’s subsidiaries, Biogen MA Inc. (“BIMA”) and Biogen International GmbH (“BIG”) (BIMA and BIG, collectively, “Biogen”). The details of the Biogen Collaboration Agreement, the August 2023 amendment to the ROFN and Option Agreement, and the payments the Company has received, and is entitled to receive, are further described in Note 5, "Collaboration Agreements", to the consolidated financial statements in the 2024 Annual Report on Form 10-K. On July 26, 2024, Denali and Biogen executed a Side Letter to the ROFN and Option Agreement, pursuant to which, effective as of the date of the Side Letter, Biogen terminated its license to the ATV:Abeta program enabled by Denali’s TfR-targeting technology against amyloid beta for the potential treatment of Alzheimer's disease, and granted Denali rights to data generated during the collaboration. The side letter also effected the immediate termination of the ROFN and Option Agreement; as such, the Company expects to receive no future milestone or royalty payments from Biogen related to the ATV:Abeta program. There were no changes to the terms of the LRRK2 Agreement during the three and six months ended June 30, 2025 or 2024. The Company has no remaining performance obligations under the Biogen Collaboration Agreement, and therefore no contract liability remained on the Condensed Consolidated Balance Sheets as of June 30, 2025 or December 31, 2024. As of June 30, 2025, the Company had not recorded milestone revenue or product sales under the Biogen Collaboration Agreement. Sanofi In October 2018, the Company entered into a Collaboration and License Agreement ("Sanofi Collaboration Agreement") with Genzyme Corporation, a wholly-owned subsidiary of Sanofi S.A. ("Sanofi"). The details of the Sanofi Collaboration Agreement and the payments the Company has received, and is entitled to receive, are further described in Note 5, "Collaboration Agreements", to the consolidated financial statements in the Company's 2024 Annual Report on Form 10-K. The Company has no remaining performance obligations under the Sanofi Collaboration Agreement, and therefore no contract liability remains on the Condensed Consolidated Balance Sheets as of June 30, 2025 or December 31, 2024. On February 24, 2025, Denali and Sanofi executed a side letter terminating Sanofi's license to the central nervous system ("CNS") Products program including SAR443820/DNL788. Subsequent to this side letter, the Company expects to receive no future milestone or royalty payments from Sanofi related to the CNS Products program. Under the Sanofi Collaboration Agreement, the Company is eligible to receive milestone payments totaling up to approximately $495.0 million upon achievement of certain clinical, regulatory and sales milestone events for Peripheral Products, and variable royalties on worldwide net sales. As of June 30, 2025, the Company had earned milestone payments of $100.0 million and had not recorded any product sales under the Sanofi Collaboration Agreement. Takeda In January 2018, the Company entered into a Collaboration and Option Agreement ("Takeda Collaboration Agreement") with Takeda Pharmaceutical Company Limited ("Takeda"). The details of the Takeda Collaboration Agreement are further described in Note 5, "Collaboration Agreements", to the consolidated financial statements in the Company's 2024 Annual Report on Form 10-K. There are no remaining performance obligations or potential payments remaining under the initial Takeda Option and Collaboration Agreement. The opt-in by Takeda on the PTV:PGRN and ATV:TREM2 programs represented two new contracts with a customer for accounting purposes (the "PTV:PGRN Collaboration Agreement" and the "ATV:TREM2 Collaboration Agreement"), both of which became effective in December 2021. The details of the PTV:PGRN Collaboration Agreement are further described in Note 5, "Collaboration Agreements", to the consolidated financial statements in the Company's 2024 Annual Report on Form 10-K. In February 2025, after mutual agreement to discontinue preclinical activities on ATV:TREM2, Takeda delivered notice of its election to terminate the ATV:TREM2 collaboration program on February 26, 2025, as per the terms of the Takeda Option and Collaboration Agreement. The ATV:TREM2 program termination became effective 60 days following the notice date, and subsequently, there are no future milestones, cost, or profit sharing related to this agreement. As of June 30, 2025, the Company had earned an aggregate of $10.0 million in option fee payments and $10.0 million in milestone payments from Takeda under the PTV:PGRN and ATV:TREM2 Collaboration Agreements, and had not recorded any product sales under either agreement. Cost Sharing Payments and Reimbursements Cost sharing payments to collaboration partners recorded as expenses in research and development expenses in the Condensed Consolidated Statements of Operations and Comprehensive Loss, and cost sharing reimbursements from collaboration partners recorded as an offset to expense in research and development expenses in the Condensed Consolidated Statements of Operations and Comprehensive Loss are as follows (in thousands):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
Takeda Collaboration Agreement: |  |  |  |  |  |  |
PTV:PGRN cost sharing (reimbursements) | $ | (1,439) |  |  | $ | (1,138) |  |  | $ | (2,935) |  |  | $ | (2,338) |
ATV:TREM2 cost sharing (reimbursements) | (10) |  |  | (215) |  |  | (147) |  |  | (728) |
Total Takeda cost sharing (reimbursements)(1) | (1,449) |  |  | (1,353) |  |  | (3,082) |  |  | (3,066) |
Biogen Collaboration Agreement: LRRK2 cost sharing payments(2) | 4,229 |  |  | 4,440 |  |  | 8,880 |  |  | 9,229 |
Net cost sharing payments (reimbursements) | $ | 2,780 |  |  | $ | 3,087 |  |  | $ | 5,798 |  |  | $ | 6,163 |
_________________________________ (1)Cost sharing reimbursements of $1.4 million and $1.5 million were recorded as a receivable within prepaid expenses and other current assets on the Condensed Consolidated Balance Sheets as of June 30, 2025 and December 31, 2024, respectively. (2)Cost sharing payments due to Biogen of $4.2 million and $2.5 million were recorded within accounts payable on the Condensed Consolidated Balance Sheets as of June 30, 2025 and December 31, 2024, respectively.

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- Definition The entire disclosure for collaborative arrangements in which the entity is a participant, including a) information about the nature and purpose of such arrangements; b) its rights and obligations thereunder; c) the accounting policy for collaborative arrangements; and d) the income statement classification and amounts attributable to transactions arising from the collaborative arrangement between participants. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 808 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479402/808-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 808 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479402/808-10-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Topic 808 -Publisher FASB -URI https://asc.fasb.org/808/tableOfContent + Details
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