X0609 4 2026-04-29 0 0001367644 Emergent BioSolutions Inc. EBS 0001242215 PAPA JOSEPH C false 300 PROFESSIONAL DRIVE GAITHERSBURG MD 20879 1 1 0 0 President and CEO 0 Common Stock 2026-04-29 2026-04-29 4 A 0 187708 0 A 493153 D The restricted stock unit grant was approved by the Compensation Committee of Emergent BioSolutions Inc. (the "Company"), on March 2, 2026, subject to stockholder approval of an amendment of the Company's 2006 Stock Incentive Plan (the "Amended Stock Incentive Plan"), under which the restricted stock units were granted. The Company's stockholders approved the Amended Stock Incentive Plan on April 29, 2026. Consists of restricted stock units granted under the Company's Amended Stock Incentive Plan. These restricted stock units vest in three annual installments beginning on the anniversary of the date of approval, assuming 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. /s/ Richard S. Lindahl, Attorney-in-fact 2026-05-01