 SEATTLE, WA ACCESSWIRE April 9, 2021 Aptevo Therapeutics Inc. NASDAQ:APVO, a clinical-stage biotechnology company focused on developing novel immuno-oncology therapeutics based on its proprietary ADAPTIRTM and ADAPTIR-FLEXTM platform technologies, today announced that it will present two new posters at the American Association for Cancer Research Virtual Annual Meeting, to be held in two virtual sessions - Saturday, April 10th to Thursday, April 15th, 2021 and Monday, May 17th to Friday, May 21st, 2021. The posters will provide preclinical updates on APVO603 and Aptevos newest pipeline candidate, APVO442. 