X0609 4 2026-10-07 0 0001367644 Emergent BioSolutions Inc. EBS 0001583098 DeGolyer Donald W false 300 PROFESSIONAL DR GAITHERSBURG MD 20879 1 0 0 0 1 Common Stock 2026-10-07 4 S 0 17800 7.09 D 111921 D Represents the number of shares sold by the Reporting Person. Shares were sold pursuant to a Rule 10b5-1 trading plan, dated August 11, 2025, for the purpose of satisfying tax obligations relating to the vesting of RSUs on October 2, 2026. The price reported in Column 4 is a weighted average price for sales executed on the same day within a one-dollar price range. These shares were sold in multiple transactions at prices ranging from $6.88 to $7.24, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above. /s/ Richard S. Lindahl, Attorney-in-fact 2026-10-07