Antengene Corporation Limited informed the shareholders and potential investors of the Company that a member of the Group has reached an assignment agreement with Calithera Biosciences, Inc. to acquire all of the outstanding rights of ATG-037. Antengene and Calithera entered into a worldwide exclusive license agreement to develop and commercialize ATG-037 in May, 2021. Under the terms of the license agreement, Calithera received an initial upfront payment and was eligible to receive payments on potential development, regulatory and sales milestones, and tiered royalties on sales of the licensed product within the range of single to low double-digits.

Pursuant to the Assignment Agreement, Antengene is no longer obligated to pay any future milestones and royalty to Calithera, and Antengene will also acquire ownership of all patents and patent applications relating to ATG-037.