X0508 4 2026-02-06 0 0001367644 Emergent BioSolutions Inc. EBS 0001989644 Hartzel William 300 PROFESSIONAL DRIVE GAITHERSBURG MD 20879 0 1 0 0 SVP, Bioservices 0 Common Stock 2026-02-06 4 D 0 5771 10.92 D 97311 D Common Stock 2026-02-06 4 F 0 630 10.92 D 96681 D Consists of performance stock units granted under the Emergent BioSolutions Inc. Stock Incentive Plan. Each PSU represents a right to receive one share of common stock. The PSUs vest upon achievement with respect to both cumulative revenues and adjusted EBITDA as a percentage of total GAAP revenue calculated on a cumulative basis over the three-year period beginning January 1, 2023 and ending December 31, 2025. On February 06, 2026, the final certification date, the Compensation Committee certified the achievement of the 2023-2025 PSUs at a payout factor of 25% of target resulting in the actual award of 1,922 shares of common stock, which is less than the 7,693 shares previously reported on March 02, 2023 and June 09, 2023. Represents shares of common stock withheld to pay taxes associated with vesting and settlement of restricted stock units /s/ Richard S. Lindahl, Attorney-in-fact 2026-02-10