Sec Form 4 Filing - Fox Jennifer Lynne @ Emergent BioSolutions Inc. - 2022-03-01

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Fox Jennifer Lynne 2. Issuer Name and Ticker or Trading Symbol Emergent BioSolutions Inc. [ EBS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) EVP, Ext Aff, GC, Corp Sec (Last) (First) (Middle) 400 PROFESSIONAL DRIVE, SUITE 400 3. Date of Earliest Transaction (MM/DD/YY) 03/01/2022 (Street) GAITHERSBURG, MD20879 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 03/01/2022 A 7,583( 1 ) A $ 0 14,833 D Common Stock 03/01/2022 A 17,794( 2 ) A $ 0 32,627 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Employee Stock Options (Right to Buy) $ 41.38 03/01/2022 A 26,584 ( 3 ) 02/28/2029 Common Stock 26,584 $ 41.38 26,584 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Fox Jennifer Lynne 400 PROFESSIONAL DRIVE SUITE 400 GAITHERSBURG, MD20879 EVP, Ext Aff, GC, Corp Sec Signatures /s/ S. Scott Lieberman Attorney-In-Fact 03/03/2022 Signature of Reporting Person Date

Explanation of Responses:

( 1 )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 adjusted EBITDA as a percentage of total GAAP revenue calculated on a cumulative basis over the three-year period beginning January 1, 2022 and ending December 31, 2024, as certified by the Compensation Committee following the performance period. The amount reported is based on the target performance payout factor, or 100%. ( 2 )Consists of restricted stock units granted under the company's Stock Incentive Plan. These restricted stock units vest either in three equal annual installments beginning on the day prior to the first anniversary of the date of grant (8,713 shares) or on the day prior to the second anniversary date of the grant (9,063 shares), 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. ( 3 )Vests in three equal installments beginning on the day prior to the anniversary date of the grant.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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