License and Collaboration Agreements	6 Months Ended
Jun. 30, 2026
Research and Development [Abstract]
License And Collaboration Agreements	License and Collaboration Agreements Asset Contribution Agreement with Pfizer In April 2018, the Company entered into an Asset Contribution Agreement (the Pfizer Agreement) with Pfizer pursuant to which the Company acquired certain assets and assumed certain liabilities from Pfizer, including agreements with Cellectis S.A. (Cellectis) and Servier as described below, and other intellectual property for the development and administration of chimeric antigen receptor (CAR) T cells for the treatment of cancer. The Company is required to make payments upon the achievement of certain sales and regulatory milestones and pay royalties on certain net sales pursuant to the Pfizer Agreement as further described in Note 6 to the Annual Report. For the three and six months ended June 30, 2026 and 2025, no milestones were achieved and no royalty payments were made. Research Collaboration and License Agreement with Cellectis As part of the Pfizer Agreement, Pfizer assigned to the Company a Research Collaboration and License Agreement (the Original Cellectis Agreement) with Cellectis S.A. (Cellectis). On March 8, 2019, the Company entered into a License Agreement (the Cellectis Agreement) with Cellectis and terminated the Original Cellectis Agreement. Pursuant to the Cellectis Agreement, Cellectis granted to the Company an exclusive, worldwide, royalty-bearing license, on a target-by-target basis, with sublicensing rights under certain conditions, under certain of Cellectis’s intellectual property, including its TALEN and electroporation technology, to make, use, sell, import, and otherwise exploit and commercialize CAR T products directed at certain targets, including B-cell maturation antigen (BCMA), CD70, Claudin 18.2, DLL3 and FLT3 (the Allogene Targets), for human oncologic therapeutic, diagnostic, prophylactic and prognostic purposes. The Company is required to make payments upon the achievement of certain development and sales milestones and pay royalties on certain net sales pursuant to the Cellectis Agreement as further described in Note 6 to the Annual Report. In April 2026, the Company received correspondence from Life Technologies Corporation (LTC), a subsidiary of Thermo Fisher Scientific, asserting that Cellectis had sublicensed to the Company or otherwise made available rights under certain patents licensed by LTC to Cellectis relating to TALEN technology, and that LTC had terminated its license agreements with Cellectis. Cellectis separately informed the Company that LTC had purported to terminate certain license agreements with Cellectis and commenced an arbitration against Cellectis and Cellectis Bioresearch before the American Arbitration Association. Cellectis also informed the Company that it disputes the purported termination and the claims asserted by LTC. The Company is not a party to the arbitration and is evaluating the potential impact, if any, on its rights under the Cellectis Agreement and its other rights relating to product candidates that use TALEN technology. For the three and six months ended June 30, 2026 and 2025, no milestones were achieved and no royalty payments were made. Exclusive License Agreement with Servier As part of the Pfizer Agreement, Pfizer assigned to the Company an Exclusive License Agreement (the Original Servier Agreement), with Les Laboratoires Servier SAS and Institut de Recherches Internationales Servier SAS (collectively, Servier) to develop, manufacture and commercialize certain allogeneic anti-CD19 CAR T cell product candidates, including UCART19, in the United States with the option to obtain the rights over additional anti-CD19 product candidates and for allogeneic CAR T cell product candidates directed against one additional target. In October 2019, the Company agreed to waive its rights to the one additional target. On May 10, 2024, the Company and Servier entered into an Amendment and Settlement Agreement (the Servier Amendment) which restructured the parties’ relationship under the Original Servier Agreement (as amended, the Servier Agreement). The Company’s licensed territory was expanded to include the European Union and the United Kingdom. The Company was also granted an option to further extend its licensed territory to include China and Japan upon the objective showing of sufficient resources to develop licensed products in those countries, which could be met through the Company entering into a strategic partnership covering those countries. Additionally, the Company agreed to waive certain of its rights under the Original Servier Agreement to elect a conversion of its license to the products directed against CD19, including UCART19, ALLO-501 and cemacabtagene ansegedleucel (cema-cel, previously ALLO-501A) (collectively, CD19 Products) to a worldwide license. Under the Servier Agreement, the Company is required to use commercially reasonable efforts to develop, manufacture and commercialize a CD19 Product. Under the Servier Agreement, Servier sublicenses to the Company certain rights which Servier licenses from Cellectis pursuant to a License, Development and Commercialization Agreement by and between Cellectis and Servier, dated February 7, 2014, as amended by Amendment No. 1 to the License, Development and Commercialization Agreement, dated March 4, 2020 (as amended, the Servier-Cellectis Agreement). As amended by the Servier Amendment, all of the Company’s future milestone payments (regulatory and sales) under the Original Servier Agreement were modified to be the same as, and to coincide with, Servier’s milestone payments to Cellectis that are required under the Servier-Cellectis Agreement. The Servier Agreement provides for aggregate potential milestone payments by the Company to Servier of up to €75.0 million upon successful completion of various regulatory milestones and first commercial sale milestones in the United States, European Union and the United Kingdom for the initial indication of each licensed product, of which €60.0 million remains for the initial indication for cema-cel, with additional payments of €55.0 million, due for each subsequent indication, of which €50.0 million remains for the first subsequent indication for cema-cel, and aggregate potential payments by the Company to Servier of up to €80.0 million upon achievement of certain net sales milestones for each licensed product. Should Servier’s rights and obligations under the Servier-Cellectis Agreement be assigned to the Company, these milestone payments would terminate, and the Company would assume Servier’s milestone payment obligations to Cellectis. In the absence of any such assignment, Servier will remain responsible for making milestone payments that may be due to Cellectis under the Servier-Cellectis Agreement. The Company previously transferred €20.0 million into an escrow account in connection with a potential future milestone payment, which is included in the remaining €60.0 million in milestone payments referenced above for the initial indication for cema-cel. The milestone would have been payable upon the occurrence of certain development, regulatory or adjudicative events. On December 15, 2025, an arbitral tribunal issued a decision providing for a partial termination of the Servier-Cellectis Agreement with respect to UCART19V1 (ALLO-501), which the Company previously abandoned in favor of cema-cel (formerly known as ALLO-501A). As a result, the Company's Servier license covering UCART19V1/ALLO-501 was terminated and Cellectis was required, at the Company's request, to engage in good-faith discussions regarding a direct license. On February 13, 2026, the €20.0 million balance in escrow was remitted to the Company, resulting in net cash proceeds of $23.7 million. The Company is obligated to pay to Servier royalties on annual net sales of any licensed products that are commercialized by the Company that are directed at CD19. Such royalties include tiered royalties on annual net sales in the United States and a flat royalty on annual net sales in territories outside the United States. The United States royalty rates are in a range from the low tens to the mid teen percentages and the ex-U.S. royalty rate is 10%. Such royalties may be reduced for interchangeable drug entry, expiration of patent rights and amounts paid pursuant to licenses of third-party patents. This royalty obligation begins upon the first commercial sale of such product in a given country and ends after the later of a defined number of years or the expiration of the last to expire licensed patent covering the product in such country. The net effect of the Servier Amendment is that the Company’s royalty rate in the United States for the first half of the first tier of net sales was increased by a low single digit percentage as compared to the Original Servier Agreement. Should Servier’s rights and obligations under the Servier-Cellectis Agreement be assigned to the Company, each tier of royalty rates in the United States to Servier would be reduced by 10%, the ex-U.S. royalties to Servier would terminate, and the Company would assume Servier’s royalty obligations to Cellectis. In the absence of any such assignment, Servier will remain responsible for making royalty payments that may be due to Cellectis under the Servier-Cellectis Agreement. The Company’s rights under the Servier Agreement with respect to CD19 Products, including cema-cel, depend in part on rights sublicensed by Servier from Cellectis. Accordingly, the purported termination of certain license agreements between LTC and Cellectis described above under “Research Collaboration and License Agreement with Cellectis” could also affect the Company’s rights with respect to CD19 Products if LTC were successful in challenging Cellectis’ rights and if the affected rights are necessary for the development, manufacture or commercialization of such products. The Company is not a party to the arbitration between LTC and Cellectis and is evaluating the potential impact, if any, on its rights under the Servier Agreement. For the three and six months ended June 30, 2026 and 2025, no milestones were achieved and no royalty payments were made. Research Collaboration and License Agreement with Roche (formerly Notch Therapeutics) On November 1, 2019, the Company entered into a Collaboration and License Agreement (the Notch Agreement) with Notch Therapeutics Inc. (Notch), pursuant to which Notch granted to Allogene an exclusive, worldwide, royalty-bearing, sublicensable license under certain of Notch’s intellectual property to develop, make, use, sell, import, and otherwise commercialize therapeutic gene-edited T cell and/or natural killer (NK) cell products from induced pluripotent stem cells directed at certain CAR targets for initial application in non-Hodgkin lymphoma, acute lymphoblastic leukemia and multiple myeloma. Pursuant to the Notch Agreement, the Company made certain investments in Notch’s capital stock as further described in Note 6 to the Annual Report. On January 25, 2024, the Company entered into an Amended and Restated Collaboration and License Agreement under which the Company has relinquished its exclusive rights to all original CAR targets except one, limited its option right to one additional CAR target and became entitled to a percentage of certain third party upfront and/or milestone payments (up to a stated cap) and a low, single-digit royalty on net sales if Notch out-licenses any released targets. If the option is exercised, the Company will have a minimum funding commitment for the overall development program. Following F. Hoffmann-La Roche AG’s (Roche) acquisition of Notch, in March 2025, Notch was dissolved, and Roche became Notch’s successor in interest under the Company’s agreement. In connection with such acquisition, on March 31, 2025 the Company entered into a Second Amendment to Amended and Restated Collaboration and License Agreement (Second Amended Notch Agreement) with Notch under which the definitions of certain terms were clarified, certain time periods for completing the transfer of certain technology were extended, and the scope of Allogene’s exclusive rights were clarified. Notch was dissolved on September 2, 2025 and final proceeds were distributed to the Company. The Company’s total equity investment in Notch as of June 30, 2026 and December 31, 2025 was zero. For the three and six months ended June 30, 2026 and 2025, no milestones were achieved. Strategic Alliance with The University of Texas MD Anderson Cancer Center On October 6, 2020, the Company entered into a strategic five-year collaboration agreement with The University of Texas MD Anderson Cancer Center (MD Anderson) for the preclinical and clinical investigation of allogeneic CAR T cell product candidates. In August 2025, the Company extended the term of the agreement for an additional year. The Company and MD Anderson are collaborating on the design and conduct of preclinical and clinical studies with oversight from a joint steering committee. Under the terms of the agreement, the Company has committed up to $15.0 million of funding for the duration of the agreement, of which $6.0 million remains. Payment of this funding is contingent on mutual agreement to study orders in order for any study to be included under the alliance. The Company is committed to making further payments to MD Anderson each year upon the anniversary of the agreement effective date through the duration of the agreement term, however, if MD Anderson has sufficient funds to continue the agreed-upon research projects, the Company may defer the additional payment to a later date. These costs are expensed to research and development as MD Anderson renders the services under the strategic alliance. Collaboration costs recorded as research and development expenses were $0.1 million and $0.2 million for the three and six months ended June 30, 2026, respectively, and $0.2 million and $0.6 million for the three and six months ended June 30, 2025, respectively. Investment in and License Agreement with Overland Therapeutics, Inc. Allogene Overland Biopharm (CY) Limited (Allogene Overland), later renamed Overland Therapeutics Inc. (Overland Therapeutics), was initially established as a joint venture by the Company and Overland Pharmaceuticals (CY) Inc. (Overland) pursuant to a Share Purchase Agreement (Share Purchase Agreement), dated December 14, 2020. Concurrently, on December 14, 2020, the Company entered into a License Agreement (License Agreement) with Allogene Overland for the purpose of developing, manufacturing and commercializing certain allogeneic CAR T cell therapies for patients in greater China, Taiwan, South Korea and Singapore (the JV Territory). Pursuant to the Share Purchase Agreement, the Company and Overland acquired Seed Preferred Shares of Allogene Overland representing 49% and 51%, respectively, of Allogene Overland’s outstanding stock. On May 24, 2024, the Company, Overland, and Allogene Overland entered into a Share Exchange Agreement (Share Exchange Agreement) pursuant to which Overland’s cell therapy business merged into Allogene Overland (the Organizational Restructuring). Under the Share Exchange Agreement, Allogene Overland acquired from Overland a 100% equity interest in Overland Pharmaceuticals (U.S.) Inc. (Overland U.S.). Overland U.S. includes certain research and development, clinical, and general and administrative staff, as well as select cell therapy assets, including its lead program, OL-101, an autologous GPRC5D-BCMA bispecific dual targeting CAR T for refractory multiple myeloma. Upon completion of the closing of the share exchange, Overland U.S. became a wholly owned subsidiary of Allogene Overland, Overland’s ownership increased to 82% and the Company’s ownership decreased to 18%. Under a separate agreement between Overland and HH BioPharma Holdings Ltd. (HBP) executed on May 24, 2024, Overland distributed all Series Seed Preferred Shares of Allogene Overland held by Overland to HBP and HBP has assumed all rights and obligations attached to such shares and all rights and obligations of Overland under the Share Exchange Agreement. In connection with the Organizational Restructuring, on May 24, 2024, the Company and Allogene Overland PRC, entered into a First Amendment to the License Agreement (the License Amendment) to amend and supplement certain provisions of the License Agreement. Under the License Amendment, the Company continued to grant Allogene Overland PRC an exclusive license to develop, manufacture, and commercialize the Licensed Products in the JV Territory, with the Company retaining exclusive rights to the Licensed Products outside the JV Territory, and the royalty obligations to the Company were amended to a flat mid single-digit royalty on net sales in the JV Territory that are no longer subject to reductions. The License Amendment also provided the Company with additional rights to terminate the License Agreement in its entirety or with respect to the relevant Overland Licensed Products if Allogene Overland PRC failed to initiate manufacturing technology transfer with respect to an Overland Licensed Product as agreed in the License Amendment, or if HBP committed a funding default or a material breach of its representations, warranties, or covenants under the Share Exchange Agreement. The License Amendment also provided that the License Agreement would terminate automatically if the Company’s ownership in Allogene Overland falls below 7.5% (other than due to the Company’s sale of the shares of Allogene Overland), unless at that time Allogene Overland PRC and the Company had mutually agreed on the manufacturing technology transfer plan for the Overland Licensed Products and Allogene Overland PRC elected to continue the license for such Overland Licensed Products with increased milestones and royalties. Under the terms of the License Amendment, such increased milestones and royalties consisted of up to $115.0 million in milestone payments for each Overland Licensed Product and tiered mid-single-digit to low-double-digit royalties on net sales in the JV Territory. As part of the Organizational Restructuring, Allogene Overland was renamed Overland Therapeutics Inc. (Overland Therapeutics) and the Company determined that Overland Therapeutics was a variable interest entity. The Company does not have the power to direct the activities which most significantly affect Overland Therapeutics’ economic performance. Accordingly, the Company did not consolidate Overland Therapeutics because the Company determined that it was not the primary beneficiary. After the Organizational Restructuring, the Company had 20% voting rights of Overland Therapeutics’ board of directors. The Company concluded that it has significant influence over Overland Therapeutics and continued to account for its investment in Overland Therapeutics as an equity method investment. The Company’s total equity investment in Overland Therapeutics as of December 31, 2025 was zero. On May 12, 2026, the Company entered into a termination agreement with Overland Therapeutics (SH) Co. Ltd. and Overland Therapeutics, Inc., pursuant to which the License Agreement was terminated in its entirety (the License Agreement Termination). In connection with the License Agreement Termination, the Company surrendered 40,353,951 shares of Overland Therapeutics for no consideration and the Company entered into the Second Amended and Restated Shareholders' Agreement among the Company, Overland Therapeutics and HBP. Mutual releases were exchanged between the parties and no termination payments were made. Following the License Agreement Termination, the Company’s ownership in Overland Therapeutics was reduced to approximately 3% on an as-converted and fully diluted basis. Upon termination of the License Agreement, the two remaining performance obligations were extinguished as of May 12, 2026: i) $1.9 million for the manufacturing license, related know-how and support and (ii) $2.7 million to the know-how to be developed in future periods. The Company concluded that the associated consideration of $4.6 million that was recorded in other long-term liabilities was nonrefundable and was therefore recognized as collaboration revenue — related party in the condensed statements of operations for the three and six months ended June 30, 2026. Following the License Agreement Termination, the Company’s ownership in Overland Therapeutics was reduced to approximately 3% and the Company’s 20% voting rights on Overland Therapeutics’ board of directors were eliminated. The Company re-performed its variable interest entity analysis and concluded that Overland Therapeutics continues to be a VIE for which the Company is not the primary beneficiary. The Company determined that it no longer has significant influence over Overland Therapeutics and, accordingly, prospectively reclassified its equity method investment to an equity security measured under the measurement alternative in accordance with ASC 321, Investments—Equity Securities, effective May 12, 2026. The initial cost basis at reclassification was zero. The Company retains approximately 3% of Overland Therapeutics’ equity on an as-converted and fully diluted basis, carried at cost less any impairment, adjusted for observable price changes in orderly transactions. Under the Second Amended and Restated Shareholders’ Agreement, the Company retains certain protective shareholder rights including a tag-along right (co-sale right if HBP proposes to transfer more than 25% of its shares to a non-affiliate), preemptive rights (pro rata participation in future equity issuances) and registration rights. These rights are protective in nature and do not constitute derivative instruments under ASC 815. For the three and six months ended June 30, 2026, the Company recognized $4.6 million of collaboration revenue — related party. Collaboration revenue was zero for the three and six months ended June 30, 2025. As of June 30, 2026, no deferred revenue related to the License Agreement remains. The Company’s total equity investment in Overland Therapeutics as of June 30, 2026 was zero. Collaboration and License Agreement with Antion On January 5, 2022, the Company entered into an exclusive collaboration and global license agreement (Antion Collaboration and License Agreement) with Antion Biosciences SA (Antion) for Antion’s miRNA technology (miCAR), to advance multiplex gene silencing as an additional tool to develop next generation allogeneic CAR T products. In July 2023, the Company and Antion entered into an amendment to the Antion Collaboration and License Agreement. Under the terms of this amendment, Antion’s exclusivity obligation relating to the collaboration was terminated; however, Antion agreed to certain restrictions on its ability to pursue products directed against specific targets. Also, in lieu of the Company’s prior obligation to make a $3.0 million investment in Antion following the completion of certain milestones, the Company agreed to make a $2.0 million investment in Antion’s preferred stock and acquired warrants to purchase an additional $3.0 million of Antion’s preferred stock. The Company is required to make payments upon the achievement of certain development and regulatory milestones and pay royalties on certain sales pursuant to the Antion Collaboration and License Agreement as further described in Note 6 to the Annual Report. As of June 30, 2026 and December 31, 2025, the Company’s total equity investment in Antion was zero. Strategic Collaboration Agreement with Foresight Diagnostics On January 3, 2024, the Company entered into a Strategic Collaboration Agreement with Foresight Diagnostics, Inc. (Foresight Diagnostics) (the Foresight Agreement). Foresight Diagnostics was acquired by Natera, Inc. (Natera) in December 2025 and continues to operate as a standalone subsidiary. Pursuant to the Foresight Agreement, the parties have agreed to collaborate on a non-exclusive basis in the development of Foresight Diagnostics’ minimal residual disease (MRD) assay based on their PhasED-Seq Circulating Tumor DNA Platform as an in vitro diagnostic to identify the MRD+ patient population to be enrolled in the Company’s planned ALPHA3 trial of cema-cel, for treatment of large B-cell lymphoma (LBCL). Under the Foresight Agreement, the Company has agreed to use its commercially reasonable efforts to obtain regulatory approval of cema-cel, and Foresight Diagnostics has agreed to use its commercially reasonable efforts to obtain regulatory approval of its MRD assay for use as an in vitro diagnostic with cema-cel. Under the Foresight Agreement, the Company has agreed to fund approximately $26.2 million in MRD assay development costs, milestone payments for regulatory submissions and assay utilization to process clinical samples. On February 19, 2025, the Company entered into an Amended and Restated Strategic Collaboration Agreement with Foresight Diagnostics which expands its collaboration to include the development of Foresight Diagnostics’ MRD assay for use with cema-cel as part of a possible EU and/or UK clinical development program, and as part of an expansion of ALPHA3 to Canadian and Australian clinical trial sites in support of the U.S. clinical development program. In November 2025, the Company amended the agreement, effective as of August 5, 2025, to add a workplan supporting clinical trial readiness activities for the expansion of ALPHA3 into South Korea. In total, the Company agreed to fund approximately $37.3 million in MRD assay development costs, milestone payments for U.S., and certain international regulatory submissions and assay utilization costs to process clinical samples, all in addition to the financial commitments under the Foresight Agreement. Clinical trial milestones recorded as research and development expenses were $0.9 million and $3.4 million for the three and six months ended June 30, 2026, respectively, and $1.7 million and $3.2 million for the three and six months ended June 30, 2025, respectively. As of June 30, 2026 and December 31, 2025, $0.9 million and $1.4 million in research and development expenses, respectively, were recorded in accrued and other liabilities.

In April 2018, the Company entered into an Asset Contribution Agreement (the Pfizer Agreement) with Pfizer pursuant to which the Company acquired certain assets and assumed certain liabilities from Pfizer, including agreements with Cellectis S.A. (Cellectis) and Servier as described below, and other intellectual property for the development and administration of chimeric antigen receptor (CAR) T cells for the treatment of cancer. The Company is required to make payments upon the achievement of certain sales and regulatory milestones and pay royalties on certain net sales pursuant to the Pfizer Agreement as further described in Note 6 to the Annual Report.

Pursuant to the Cellectis Agreement, Cellectis granted to the Company an exclusive, worldwide, royalty-bearing license, on a target-by-target basis, with sublicensing rights under certain conditions, under certain of Cellectis’s intellectual property, including its TALEN and electroporation technology, to make, use, sell, import, and otherwise exploit and commercialize CAR T products directed at certain targets, including B-cell maturation antigen (BCMA), CD70, Claudin 18.2, DLL3 and FLT3 (the Allogene Targets), for human oncologic therapeutic, diagnostic, prophylactic and prognostic purposes. The Company is required to make payments upon the achievement of certain development and sales milestones and pay royalties on certain net sales pursuant to the Cellectis Agreement as further described in Note 6 to the Annual Report.

In April 2026, the Company received correspondence from Life Technologies Corporation (LTC), a subsidiary of Thermo Fisher Scientific, asserting that Cellectis had sublicensed to the Company or otherwise made available rights under certain patents licensed by LTC to Cellectis relating to TALEN technology, and that LTC had terminated its license agreements with Cellectis. Cellectis separately informed the Company that LTC had purported to terminate certain license agreements with Cellectis and commenced an arbitration against Cellectis and Cellectis Bioresearch before the American Arbitration Association. Cellectis also informed the Company that it disputes the purported termination and the claims asserted by LTC.

As part of the Pfizer Agreement, Pfizer assigned to the Company an Exclusive License Agreement (the Original Servier Agreement), with Les Laboratoires Servier SAS and Institut de Recherches Internationales Servier SAS (collectively, Servier) to develop, manufacture and commercialize certain allogeneic anti-CD19 CAR T cell product candidates, including UCART19, in the United States with the option to obtain the rights over additional anti-CD19 product candidates and for allogeneic CAR T cell product candidates directed against one additional target. In October 2019, the Company agreed to waive its rights to the one additional target.

On May 10, 2024, the Company and Servier entered into an Amendment and Settlement Agreement (the Servier Amendment) which restructured the parties’ relationship under the Original Servier Agreement (as amended, the Servier Agreement). The Company’s licensed territory was expanded to include the European Union and the United Kingdom. The Company was also granted an option to further extend its licensed territory to include China and Japan upon the objective showing of sufficient resources to develop licensed products in those countries, which could be met through the Company entering into a strategic partnership covering those countries. Additionally, the Company agreed to waive certain of its rights under the Original Servier Agreement to elect a conversion of its license to the products directed against CD19, including UCART19, ALLO-501 and cemacabtagene ansegedleucel (cema-cel, previously ALLO-501A) (collectively, CD19 Products) to a worldwide license. Under the Servier Agreement, the Company is required to use commercially reasonable efforts to develop, manufacture and commercialize a CD19 Product.

Under the Servier Agreement, Servier sublicenses to the Company certain rights which Servier licenses from Cellectis pursuant to a License, Development and Commercialization Agreement by and between Cellectis and Servier, dated February 7, 2014, as amended by Amendment No. 1 to the License, Development and Commercialization Agreement, dated March 4, 2020 (as amended, the Servier-Cellectis Agreement). As amended by the Servier Amendment, all of the Company’s future milestone payments (regulatory and sales) under the Original Servier Agreement were modified to be the same as, and to coincide with, Servier’s milestone payments to Cellectis that are required under the Servier-Cellectis Agreement. The Servier Agreement provides for aggregate potential milestone payments by the Company to Servier of up to €75.0 million upon successful completion of various regulatory milestones and first commercial sale milestones in the United States, European Union and the United Kingdom for the initial indication of each licensed product, of which €60.0 million remains for the initial indication for cema-cel, with additional payments of €55.0 million, due for each subsequent indication, of which €50.0 million remains for the first subsequent indication for cema-cel, and aggregate potential payments by the Company to Servier of up to €80.0 million upon achievement of certain net sales milestones for each licensed product. Should Servier’s rights and obligations under the Servier-Cellectis Agreement be assigned to the Company, these milestone payments would terminate, and the Company would assume Servier’s milestone payment obligations to Cellectis. In the absence of any such assignment, Servier will remain responsible for making milestone payments that may be due to Cellectis under the Servier-Cellectis Agreement.

The Company previously transferred €20.0 million into an escrow account in connection with a potential future milestone payment, which is included in the remaining €60.0 million in milestone payments referenced above for the initial indication for cema-cel. The milestone would have been payable upon the occurrence of certain development, regulatory or adjudicative events. On December 15, 2025, an arbitral tribunal issued a decision providing for a partial termination of the Servier-Cellectis Agreement with respect to UCART19V1 (ALLO-501), which the Company previously abandoned in favor of cema-cel (formerly known as ALLO-501A). As a result, the Company's Servier license covering UCART19V1/ALLO-501 was terminated and Cellectis was required, at the Company's request, to engage in good-faith discussions regarding a direct license. On February 13, 2026, the €20.0 million balance in escrow was remitted to the Company, resulting in net cash proceeds of $23.7 million.

The Company is obligated to pay to Servier royalties on annual net sales of any licensed products that are commercialized by the Company that are directed at CD19. Such royalties include tiered royalties on annual net sales in the United States and a flat royalty on annual net sales in territories outside the United States. The United States royalty rates are in a range from the low tens to the mid teen percentages and the ex-U.S. royalty rate is 10%. Such royalties may be reduced for interchangeable drug entry, expiration of patent rights and amounts paid pursuant to licenses of third-party patents. This royalty obligation begins upon the first commercial sale of such product in a given country and ends after the later of a defined number of years or the expiration of the last to expire licensed patent covering the product in such country. The net effect of the Servier Amendment is that the Company’s royalty rate in the United States for the first half of the first tier of net sales was increased by a low single digit percentage as compared to the Original Servier Agreement. Should Servier’s rights and obligations under the

Servier-Cellectis Agreement be assigned to the Company, each tier of royalty rates in the United States to Servier would be reduced by 10%, the ex-U.S. royalties to Servier would terminate, and the Company would assume Servier’s royalty obligations to Cellectis. In the absence of any such assignment, Servier will remain responsible for making royalty payments that may be due to Cellectis under the Servier-Cellectis Agreement.

The Company’s rights under the Servier Agreement with respect to CD19 Products, including cema-cel, depend in part on rights sublicensed by Servier from Cellectis. Accordingly, the purported termination of certain license agreements between LTC and Cellectis described above under “Research Collaboration and License Agreement with Cellectis” could also affect the Company’s rights with respect to CD19 Products if LTC were successful in challenging Cellectis’ rights and if the affected rights are necessary for the development, manufacture or commercialization of such products. The Company is not a party to the arbitration between LTC and Cellectis and is evaluating the potential impact, if any, on its rights under the Servier Agreement.

On November 1, 2019, the Company entered into a Collaboration and License Agreement (the Notch Agreement) with Notch Therapeutics Inc. (Notch), pursuant to which Notch granted to Allogene an exclusive, worldwide, royalty-bearing, sublicensable license under certain of Notch’s intellectual property to develop, make, use, sell, import, and otherwise commercialize therapeutic gene-edited T cell and/or natural killer (NK) cell products from induced pluripotent stem cells directed at certain CAR targets for initial application in non-Hodgkin lymphoma, acute lymphoblastic leukemia and multiple myeloma. Pursuant to the Notch Agreement, the Company made certain investments in Notch’s capital stock as further described in Note 6 to the Annual Report.

On January 25, 2024, the Company entered into an Amended and Restated Collaboration and License Agreement under which the Company has relinquished its exclusive rights to all original CAR targets except one, limited its option right to one additional CAR target and became entitled to a percentage of certain third party upfront and/or milestone payments (up to a stated cap) and a low, single-digit royalty on net sales if Notch out-licenses any released targets. If the option is exercised, the Company will have a minimum funding commitment for the overall development program.

Following F. Hoffmann-La Roche AG’s (Roche) acquisition of Notch, in March 2025, Notch was dissolved, and Roche became Notch’s successor in interest under the Company’s agreement. In connection with such acquisition, on March 31, 2025 the Company entered into a Second Amendment to Amended and Restated Collaboration and License Agreement (Second Amended Notch Agreement) with Notch under which the definitions of certain terms were clarified, certain time periods for completing the transfer of certain technology were extended, and the scope of Allogene’s exclusive rights were clarified. Notch was dissolved on September 2, 2025 and final proceeds were distributed to the Company.

On October 6, 2020, the Company entered into a strategic five-year collaboration agreement with The University of Texas MD Anderson Cancer Center (MD Anderson) for the preclinical and clinical investigation of allogeneic CAR T cell product candidates. In August 2025, the Company extended the term of the agreement for an additional year. The Company and MD Anderson are collaborating on the design and conduct of preclinical and clinical studies with oversight from a joint steering committee.

Under the terms of the agreement, the Company has committed up to $15.0 million of funding for the duration of the agreement, of which $6.0 million remains. Payment of this funding is contingent on mutual agreement to study orders in order for any study to be included under the alliance. The Company is committed to making further payments to MD Anderson each year upon the anniversary of the agreement effective date through the duration of the agreement term, however, if MD Anderson has sufficient funds to continue the agreed-upon research projects, the Company may defer the additional payment to a later date. These costs are expensed to research and development as MD Anderson renders the services under the strategic alliance.

Allogene Overland Biopharm (CY) Limited (Allogene Overland), later renamed Overland Therapeutics Inc. (Overland Therapeutics), was initially established as a joint venture by the Company and Overland Pharmaceuticals (CY) Inc. (Overland) pursuant to a Share Purchase Agreement (Share Purchase Agreement), dated December 14, 2020. Concurrently, on December 14, 2020, the Company entered into a License Agreement (License Agreement) with Allogene Overland for the purpose of developing, manufacturing and commercializing certain allogeneic CAR T cell therapies for patients in greater China, Taiwan, South Korea and Singapore (the JV Territory). Pursuant to the Share Purchase Agreement, the Company and Overland acquired Seed Preferred Shares of Allogene Overland representing 49% and 51%, respectively, of Allogene Overland’s outstanding stock.

Under the Share Exchange Agreement, Allogene Overland acquired from Overland a 100% equity interest in Overland Pharmaceuticals (U.S.) Inc. (Overland U.S.). Overland U.S. includes certain research and development, clinical, and general and administrative staff, as well as select cell therapy assets, including its lead program, OL-101, an autologous GPRC5D-BCMA bispecific dual targeting CAR T for refractory multiple myeloma. Upon completion of the closing of the share exchange, Overland U.S. became a wholly owned subsidiary of Allogene Overland, Overland’s ownership increased to 82% and the Company’s ownership decreased to 18%. Under a separate agreement between Overland and HH BioPharma Holdings Ltd. (HBP) executed on May 24, 2024, Overland distributed all Series Seed Preferred Shares of Allogene Overland held by Overland to HBP and HBP has assumed all rights and obligations attached to such shares and all rights and obligations of Overland under the Share Exchange Agreement.

In connection with the Organizational Restructuring, on May 24, 2024, the Company and Allogene Overland PRC, entered into a First Amendment to the License Agreement (the License Amendment) to amend and supplement certain provisions of the License Agreement. Under the License Amendment, the Company continued to grant Allogene Overland PRC an exclusive license to develop, manufacture, and commercialize the Licensed Products in the JV Territory, with the Company retaining exclusive rights to the Licensed Products outside the JV Territory, and the royalty obligations to the Company were amended to a flat mid single-digit royalty on net sales in the JV Territory that are no longer subject to reductions. The License Amendment also provided the Company with additional rights to terminate the License Agreement in its entirety or with respect to the relevant Overland Licensed Products if Allogene Overland PRC failed to initiate manufacturing technology transfer with respect to an Overland Licensed Product as agreed in the License Amendment, or if HBP committed a funding default or a material breach of its representations, warranties, or covenants under the Share Exchange Agreement. The License Amendment also provided that the License Agreement would terminate automatically if the Company’s ownership in Allogene Overland falls below 7.5% (other than due to the Company’s sale of the shares of Allogene Overland), unless at that time Allogene Overland PRC and the Company had mutually agreed on the manufacturing technology transfer plan for the Overland Licensed Products and Allogene Overland PRC elected to continue the license for such Overland Licensed Products with increased milestones and royalties. Under the terms of the License Amendment, such increased milestones and royalties consisted of up to $115.0 million in milestone payments for each Overland Licensed Product and tiered mid-single-digit to low-double-digit royalties on net sales in the JV Territory.

As part of the Organizational Restructuring, Allogene Overland was renamed Overland Therapeutics Inc. (Overland Therapeutics) and the Company determined that Overland Therapeutics was a variable interest entity. The Company does not have the power to direct the activities which most significantly affect Overland Therapeutics’ economic performance. Accordingly, the Company did not consolidate Overland Therapeutics because the Company determined that it was not the primary beneficiary. After the Organizational Restructuring, the Company had 20% voting rights of Overland Therapeutics’ board of directors. The Company concluded that it has significant influence over Overland Therapeutics and continued to account for its investment in Overland Therapeutics as an equity method investment. The Company’s total equity investment in Overland Therapeutics as of December 31, 2025 was zero.

On May 12, 2026, the Company entered into a termination agreement with Overland Therapeutics (SH) Co. Ltd. and Overland Therapeutics, Inc., pursuant to which the License Agreement was terminated in its entirety (the License Agreement Termination). In connection with the License Agreement Termination, the Company surrendered 40,353,951 shares of Overland Therapeutics for no consideration and the Company entered into the Second Amended and Restated Shareholders' Agreement among the Company, Overland Therapeutics and HBP. Mutual releases were exchanged between the parties and no termination payments were made. Following the License Agreement Termination, the Company’s ownership in Overland Therapeutics was reduced to approximately 3% on an as-converted and fully diluted basis.

Following the License Agreement Termination, the Company’s ownership in Overland Therapeutics was reduced to approximately 3% and the Company’s 20% voting rights on Overland Therapeutics’ board of directors were eliminated. The Company re-performed its variable interest entity analysis and concluded that Overland Therapeutics continues to be a VIE for which the Company is not the primary beneficiary. The Company determined that it no longer has significant influence over Overland Therapeutics and, accordingly, prospectively reclassified its equity method investment to an equity security measured under the measurement alternative in accordance with ASC 321, Investments—Equity Securities, effective May 12, 2026. The initial cost basis at reclassification was zero. The Company retains approximately 3% of Overland Therapeutics’ equity on an as-converted and fully diluted basis, carried at cost less any impairment, adjusted for observable price changes in orderly transactions.

Under the Second Amended and Restated Shareholders’ Agreement, the Company retains certain protective shareholder rights including a tag-along right (co-sale right if HBP proposes to transfer more than 25% of its shares to a non-affiliate), preemptive rights (pro rata participation in future equity issuances) and registration rights. These rights are protective in nature and do not constitute derivative instruments under ASC 815.

In July 2023, the Company and Antion entered into an amendment to the Antion Collaboration and License Agreement. Under the terms of this amendment, Antion’s exclusivity obligation relating to the collaboration was terminated; however, Antion agreed to certain restrictions on its ability to pursue products directed against specific targets. Also, in lieu of the Company’s prior obligation to make a $3.0 million investment in Antion following the completion of certain milestones, the Company agreed to make a $2.0 million investment in Antion’s preferred stock and acquired warrants to purchase an additional $3.0 million of Antion’s preferred stock. The Company is required to make payments upon the achievement of certain development and regulatory milestones and pay royalties on certain sales pursuant to the Antion Collaboration and License Agreement as further described in Note 6 to the Annual Report.

On January 3, 2024, the Company entered into a Strategic Collaboration Agreement with Foresight Diagnostics, Inc. (Foresight Diagnostics) (the Foresight Agreement). Foresight Diagnostics was acquired by Natera, Inc. (Natera) in December 2025 and continues to operate as a standalone subsidiary. Pursuant to the Foresight Agreement, the parties have agreed to collaborate on a non-exclusive basis in the development of Foresight Diagnostics’ minimal residual disease (MRD) assay based on their PhasED-Seq Circulating Tumor DNA Platform as an in vitro diagnostic to identify the MRD+ patient population to be enrolled in the Company’s planned ALPHA3 trial of cema-cel, for treatment of large B-cell lymphoma (LBCL). Under the Foresight Agreement, the Company has agreed to use its commercially reasonable efforts to obtain regulatory approval of cema-cel, and Foresight Diagnostics has agreed to use its commercially reasonable efforts to obtain regulatory approval of its MRD assay for use as an in vitro diagnostic with cema-cel. Under the Foresight Agreement, the Company has agreed to fund approximately $26.2 million in MRD assay development costs, milestone payments for regulatory submissions and assay utilization to process clinical samples.

On February 19, 2025, the Company entered into an Amended and Restated Strategic Collaboration Agreement with Foresight Diagnostics which expands its collaboration to include the development of Foresight Diagnostics’ MRD assay for use with cema-cel as part of a possible EU and/or UK clinical development program, and as part of an expansion of ALPHA3 to Canadian and Australian clinical trial sites in support of the U.S. clinical development program. In November 2025, the Company amended the agreement, effective as of August 5, 2025, to add a workplan supporting clinical trial readiness activities for the expansion of ALPHA3 into South Korea. In total, the Company agreed to fund approximately $37.3 million in MRD