Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Esposito Denise
 2. Date of Event Requiring Statement (Month/Day/Year)
04/01/2007		 3. Issuer Name and Ticker or Trading Symbol
Emergent BioSolutions Inc. [EBS]
(Last)
(First)
(Middle)
2273 RESEARCH BLVD.		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
SVP Legal Affairs & GC
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

ROCKVILLE, MD 20850		 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 Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 500
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (right to buy)   (1) 12/12/2013 Common Stock 28,316 $ 10.13 D  
Employee Stock Option (right to buy)   (2) 12/12/2013 Common Stock 1,684 $ 10.13 D  
Employee Stock Option (right to buy)   (3) 02/09/2010 Common Stock 14,385 $ 2.74 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Esposito Denise
2273 RESEARCH BLVD.
ROCKVILLE, MD 20850		       SVP Legal Affairs & GC  

Signatures

/s/R. Don Elsey, attorney in fact 04/03/2007
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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).
(1) The option will vest with respect to 8,574 shares of Common Stock on December 12, 2007 and will vest with respect to the remaining 19,742 shares in two equal installments on December 12, 2008 and December 12, 2009.
(2) The option will vest with respect to 1,426 shares of Common Stock on December 12, 2007 and will vest with respect to the remaining 258 shares in two equal installments on December 12, 2008 and December 12, 2009.
(3) The option is vested with respect to 9,590 shares of Common Stock and will vest with respect to the remaining 4,795 shares on December 31, 2007.
 
Remarks:
Exhibit List: Exhibit 24 - Power of Attorney

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