X0306 4 2018-01-22 0 0001367644 Emergent BioSolutions Inc. EBS 0001294935 Hauer Jerome M 400 PROFESSIONAL DR, SUITE 400 GAITHERSBURG MD 20879 1 0 0 0 Common Stock 2018-01-22 4 M 0 5152 25.47 A 23797 D Common Stock 2018-01-22 4 S 0 5152 50.9108 D 18645 D Common Stock 2018-01-23 4 S 0 2577 50.25 D 16068 D Stock Option (Right to Buy) 25.47 2018-01-22 4 M 0 5152 0.00 D 2022-01-21 Common Stock 5152 0 D The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Dr. Hauer. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $50.25 to $51.25, inclusive. The reporting person will provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range. Consists of an option granted on January 22, 2015 under the company's stock incentive plan as amended and restated. The option grant vests in three equal installments on the day prior to the first, second and third anniversary dates of the grant. /s/ Eric Burt, Attorney-in-fact 2018-01-24