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License Agreements | 3 Months Ended
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Mar. 31, 2026
Revenue from Contract with Customer [Abstract] |
License Agreements | 7. L icense Agreements Former Bristol-Myers Squibb Company License Agreement On April 9, 2014, the Company entered into a license agreement (as amended the “BMS License Agreement”) with BMS for exclusive rights for certain patents and a non-exclusive license for certain technology and know-how pertaining to FYARRO. The BMS License Agreement will remain in effect from the effective date of April 9, 2014 until expiration of all milestone and royalty payment obligations under the agreement, unless terminated by either of the parties pursuant to the terms of the BMS License Agreement, including providing advance notice as specified in the agreement. Under the terms of the BMS License Agreement, BMS agreed to supply the Company with licensed products of FYARRO necessary for clinical or non-clinical development. Under the terms of the BMS License Agreement, BMS is entitled to receive royalties on net sales from licensed products under the agreement and any sublicense fees. During the three months ended March 31, 2026 and 2025, royalties on net product sales were $0 and $0.5 million, respectively. No payments related to sublicense fees were paid during the three months ended March 31, 2026 and 2025. As part of its purchase of the FYARRO Business, KAKEN acquired the Company's rights and responsibilities under the BMS License Agreement. WuXi Biologics License Agreement On December 19, 2024, the Company entered into an Intellectual Property License Agreement (the “License Agreement”) with WuXi Biologics (Shanghai FX) Co., Ltd. (“WuXi Biologics”) for exclusive rights to certain patents and know-how pertaining to WuXi Biologics’ preclinical antibody drug conjugate programs leveraging Hangzhou DAC Biotechnology Co., Ltd.’s (“Hangzhou DAC”) linker-payload technology targeting each of the ADC Therapies. Under the License Agreement, the Company paid WuXi Biologics a non-refundable, partial upfront payment of $6.0 million on December 20, 2024. An additional non-refundable, upfront payment of $38.0 million was due within one-hundred twenty (120) days after the effective date of the License Agreement for the rights and licenses granted to the Company by WuXi Biologics and was paid on April 16, 2025. In accordance with the License Agreement, WuXi Biologics is eligible to receive from the Company (a) up to an aggregate of $265.0 million upon the achievement of certain development milestones, and (b) up to an aggregate of $540.0 million upon the achievement of certain commercial milestones, across all ADC Therapies. WuXi Biologics is also entitled to running royalties ranging from low-single-digit to upper-single-digit percentages of annual net sales of licensed products in the territory on a product-by-product and region-by-region basis from the first commercial sale of the applicable licensed product in a particular region until the date which is the later of (i) expiration of the last to expire valid claim of a license patent in such region covering the sale of such licensed product in such region or (ii) ten years after the first commercial sale of such licensed product in such region. Each party may terminate the License Agreement in its entirety, or on a program-by-program basis, as applicable, if the other party remains in material breach of the License Agreement following a cure period to remedy the material breach or if the other party is declared insolvent or in similar financial distress. In addition, WuXi Biologics may terminate the License Agreement on a program-by-program basis if the Company does not meet certain development due diligence milestones. The Company may terminate the License Agreement in its entirety, or on a program-by-program basis, as applicable, with or without cause.

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