X0204 3 2011-12-21 0 0001367644 Emergent BioSolutions Inc. EBS 0001380176 Chatfield Steven 2273 RESEARCH BLVD SUITE 400 ROCKVILLE MD 20850 0 1 0 0 EVP & President, BioSciences Common Stock 11783 D Employee Stock Option (right to buy) 15.91 2017-03-08 Common Stock 17200 D Employee Stock Option (right to buy) 24.15 2018-03-14 Common Stock 12095 D Consists of restricted stock units granted under the Amended and Restated Emergent BioSolutions Inc. 2006 Stock Incentive Plan. These shares consist of (i) 5,733 Restricted Stock Units from one grant that will vest with respect to 2,866 shares on March 8, 2012 and with respect to 2,867 shares on March 8, 2013, and (ii) 6,050 Restricted Stock Units from another grant that will vest in three equal installments on March 14, 2012, March 14, 2013 and March 14, 2014. Vesting is subject to continued service with the Company. Each restricted stock unit represents the right of the Reporting Person to receive one share of common stock of Emergent BioSolutions Inc., subject to adjustment as provided in the grant agreement. The option has vested with respect to 5,734 options, which have been disposed of. The grant will vest with respect to the remaining options in two equal installments on March 8, 2012 and March 8, 2013 The option will vest in three equal installments on March 14, 2012, March 14, 2013 and March 14, 2014. /s/Don Elsey, attorney-in-fact 2012-01-06