Einstein License Agreement	3 Months Ended
Mar. 31, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Einstein License Agreement	8. Einstein License Agreement On January 14, 2015, the Company entered into a license agreement, as amended and restated on July 31, 2017 and as further amended on October 30, 2018, January 13, 2024, and April 10, 2025 (the “Einstein License”), with Albert Einstein College of Medicine (“Einstein”) for certain patent rights relating to the Company’s core technology platform for the engineering of biologics to control T cell activity, precision, immune-modulatory drug product candidates, and two supporting technologies that enable the discovery of costimulatory signaling molecules (ligands) and T cell targeting peptides. Pursuant to the April 2025 amendment, Einstein consented to the Company’s entry into the Collaboration and License Agreement (the “BI Collaboration and License Agreement”) with Boehringer Ingelheim International GmbH (“BI”) and granted the Company the right to sublicense to BI. In addition, Einstein and the Company agreed to amend specified upstream payment obligations that may be owed to Einstein by the Company, solely in connection with the sublicense to BI. Under the Einstein License, the Company holds an exclusive worldwide license, with the right to sublicense, import, make, have made, use, provide, offer to sell, and sell all products, processes and services that use the patents covered by the Einstein License, including certain technology received from Einstein relating thereto (the “Einstein Licensed Products”). Under the Einstein License, the Company is required to: • Pay royalties and amounts based on a certain percentage of proceeds, as defined in the Einstein License, from sales of Einstein Licensed Products and sublicense agreements. • Pay escalating annual maintenance fees, which are nonrefundable, but are creditable against the amount due to Einstein for royalties. • Make significant payments based upon the achievement of certain milestones, as defined in the Einstein License. Payments made upon achievement of milestones are nonrefundable and are not creditable against any other payment due to Einstein. At March 31, 2026, the Company had made aggregate payments totaling $3.09 million since inception with respect to achievement of these milestones. • Incur minimum product development costs until the first commercial sale of the first Einstein Licensed Product. The Einstein License requires the Company to pay a percentage of sublicenses related to the Company’s patent rights for components of its core technology that is licensed from Einstein. The Einstein License expires upon the expiration of the Company’s last obligation to make royalty payments to Einstein which may be due with respect to certain Einstein Licensed Products, unless terminated earlier under the provisions thereof. The Einstein License includes certain termination provisions if the Company fails to meet its obligations thereunder. The Company was in compliance with its obligations under the Einstein License at March 31, 2026 and December 31, 2025. Pursuant to the Einstein License, the Company issued to Einstein 22,385 shares of the Company’s common stock in connection with the consummation of the initial public offering of its common stock on December 27, 2017. The Company accounts for license fees incurred in connection with the Einstein License in accordance with ASC Topic 730, Research and Development. Please refer to Note 11 Collaboration Revenue.

Einstein License Agreement

3 Months Ended

Mar. 31, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

On January 14, 2015, the Company entered into a license agreement, as amended and restated on July 31, 2017 and as further amended on October 30, 2018, January 13, 2024, and April 10, 2025 (the “Einstein License”), with Albert Einstein College of Medicine (“Einstein”) for certain patent rights relating to the Company’s core technology platform for the engineering of biologics to control T cell activity, precision, immune-modulatory drug product candidates, and two supporting technologies that enable the discovery of costimulatory signaling molecules (ligands) and T cell targeting peptides.

Pursuant to the April 2025 amendment, Einstein consented to the Company’s entry into the Collaboration and License Agreement (the “BI Collaboration and License Agreement”) with Boehringer Ingelheim International GmbH (“BI”) and granted the Company the right to sublicense to BI. In addition, Einstein and the Company agreed to amend specified upstream payment obligations that may be owed to Einstein by the Company, solely in connection with the sublicense to BI.

Under the Einstein License, the Company holds an exclusive worldwide license, with the right to sublicense, import, make, have made, use, provide, offer to sell, and sell all products, processes and services that use the patents covered by the Einstein License, including certain technology received from Einstein relating thereto (the “Einstein Licensed Products”). Under the Einstein License, the Company is required to:

•

Pay royalties and amounts based on a certain percentage of proceeds, as defined in the Einstein License, from sales of Einstein Licensed Products and sublicense agreements.

•

Pay escalating annual maintenance fees, which are nonrefundable, but are creditable against the amount due to Einstein for royalties.

•

Make significant payments based upon the achievement of certain milestones, as defined in the Einstein License. Payments made upon achievement of milestones are nonrefundable and are not creditable against any other payment due to Einstein. At March 31, 2026, the Company had made aggregate payments totaling $3.09 million since inception with respect to achievement of these milestones.

•

Incur minimum product development costs until the first commercial sale of the first Einstein Licensed Product.

The Einstein License requires the Company to pay a percentage of sublicenses related to the Company’s patent rights for components of its core technology that is licensed from Einstein.

The Einstein License expires upon the expiration of the Company’s last obligation to make royalty payments to Einstein which may be due with respect to certain Einstein Licensed Products, unless terminated earlier under the provisions thereof. The Einstein License includes certain termination provisions if the Company fails to meet its obligations thereunder. The Company was in compliance with its obligations under the Einstein License at March 31, 2026 and December 31, 2025.

Pursuant to the Einstein License, the Company issued to Einstein 22,385 shares of the Company’s common stock in connection with the consummation of the initial public offering of its common stock on December 27, 2017.

The Company accounts for license fees incurred in connection with the Einstein License in accordance with ASC Topic 730, Research and Development. Please refer to Note 11 Collaboration Revenue.