X0508 4 2025-12-05 0 0001367644 Emergent BioSolutions Inc. EBS 0001380177 Richard Ronald 300 PROFESSIONAL DR GAITHERSBURG MD 20879 1 0 0 0 0 Common Stock 2025-12-05 2025-12-05 4 S 0 7100 12.1113 D 98417 D Common Stock 2025-12-05 2025-12-05 4 M 0 25748 5.02 A 124165 D Common Stock 2025-12-05 2025-12-05 4 F 0 10864 11.8978 D 113301 D Common Stock 2025-12-05 2025-12-05 4 S 0 14884 11.8978 D 98417 D Stock Option (Right to Buy) 5.02 2025-12-05 2025-12-05 4 M 0 25748 0 D 2031-05-22 Common Stock 25748 0 D Consists of restricted stock units granted under the Company's Stock Incentive Plan, as amended and restated. The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $12.11 to $12.12. Represents shares of common stock sold solely to satisfy the option exercise price and applicable taxes associated with the option exercise. The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $11.88 to $11.97. Consists of stock options granted under the Company's Stock Incentive Plan, as amended and restated, as compensation for Board and Committee service. The shares underlying the options exercised were fully vested on May 22, 2025. /s/ Richard S. Lindahl, Attorney-in-fact 2025-12-09