The board (the "Board") of directors (the "Directors") of the Company announced that on June 5, 2024, Jiangsu Alphamab Biopharmaceuticals Co., Ltd. ("Alphamab"), entered into a research and collaboration agreement (the
"Collaboration Agreement") with ArriVent BioPharma, Inc. According to the terms of the Collaboration Agreement, Alphamab and ArriVent will collaborate to use Alphamab ' s proprietary linker-payload (Alphatecan) and glycan-conjugation platforms to discover and develop novel antibody drug conjugates (" ADC "). Alphamab will retain the rights to develop and commercialize the related ADC products (the "ADC Products") under the Collaboration Agreement, in mainland China, Hong Kong Special Administrative Region, Macau Special Administrative Region and Taiwan Region (collectively, the "Greater China Region"). ArriVent will have exclusive rights to develop and commercialize the ADC Products in the field of oncology in countries and regions outside of the Greater China Region and will be responsible for and bear the cost of the corresponding development of the ADC Products. According to the Collaboration Agreement, Alphamab is entitled to receive a one-time, non-refundable upfront payment and potential milestone payments based on the achievement of certain regulatory, development, and sales milestones of up to US$615.5 million in aggregate for the programs. In addition, Alphamab is also entitled to receive tiered sales royalties from ArriVent for each ADC Product.