X0306 4 2015-05-14 0 0001367644 Emergent BioSolutions Inc. EBS 0001380187 Abdun-Nabi Daniel 400 PROFESSIONAL DR, SUITE 400 GAITHERSBURG MD 20879 1 1 0 0 President & CEO Common Stock 2015-05-14 4 G 0 936 0 D 183869 D This transaction involved a gift of issuer common stock by the reporting person to his son, who shares reporting person's household. The reporting person disclaims beneficial ownership of the shares held by his son. This report should not be deemed as an admission that the reporting person is the beneficial owner of his son's shares for purpose of Section 16 or for any other purpose. /s/ Eric Burt, attorney-in-fact 2015-05-15