X0206 3 2016-07-15 0 0001671584 Aptevo Therapeutics Inc. APVO 0001367644 Emergent BioSolutions Inc. 400 PROFESSIONAL DR, SUITE 400 GAITHERSBURG MD 20879 0 0 1 0 Common Stock, par value $0.001 per share 1000 D /s/ A.B. Cruz, III, Executive Vice President, General Counsel and Corporate Secretary 2016-07-15