X0306 4 2018-05-24 0 0001367644 Emergent BioSolutions Inc. EBS 0001380177 Richard Ronald 400 PROFESSIONAL DR, SUITE 400 GAITHERSBURG MD 20879 1 0 0 0 Common Stock 2018-05-24 4 A 0 4895 0.00 A 28305 D Consists of restricted stock units granted under the Fourth Amended and Restated Emergent BioSolutions Inc. 2006 Stock Incentive Plan, as amended. These restricted stock units vest in three equal annual installments beginning on the earlier of (i) the day prior to the anniversary of the date of grant or (ii) one business day prior to date of the Company's next annual meeting; provided that the individual is serving on the Board on such date. /s/ S. Scott Lieberman, Attorney-in-fact 2018-05-24