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 OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Harsanyi Zsolt 		2. Issuer Name and Ticker or Trading Symbol

Emergent BioSolutions Inc. [ EBS ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

__ X __ Director                      _____ 10% Owner
_____ Officer (give title below)      _____ Other (specify below)
(Last)          (First)          (Middle)

400 PROFESSIONAL DR, SUITE 400 		3. Date of Earliest Transaction (MM/DD/YYYY)

5/25/2017
(Street)

GAITHERSBURG, MD 20879
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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   (1) 8/1/2016     J    152   A $0   34637   D    
Common Stock   (2) 8/1/2016     J    604   A $0   35241   D    
Common Stock   (3) 8/1/2016     J    577   A $0   35818   D    
Common Stock   (4) 5/25/2017     A    8259   (5) A $0.00   44077   D    

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. 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 7. Title and Amount of Securities Underlying Derivative Security
(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 Option (Right to buy)   (6) $18.64   8/1/2016     J      301         (7) 5/21/2021   Common Stock   3434   $0.00   3434   D    

Explanation of Responses:
(1)  In connection with the spin-off of Aptevo Therapeutics Inc. from Emergent BioSolutions Inc, on August 1, 2016 the reporting person received a grant of restricted stock units as a result of an adjustment to an existing Emergent restricted stock unit grant held by the reporting person prior to the spin-off. The restricted stock units vest in May 2017.
(2)  In connection with the spin-off of Aptevo Therapeutics Inc. from Emergent BioSolutions Inc, on August 1, 2016 the reporting person received a grant of restricted stock units as a result of an adjustment to an existing Emergent restricted stock unit grant held by the reporting person prior to the spin-off. The restricted stock units vest in May 2017 and May 2018.
(3)  In connection with the spin-off of Aptevo Therapeutics Inc. from Emergent BioSolutions Inc, on August 1, 2016 the reporting person received a grant of restricted stock units as a result of an adjustment to an existing Emergent restricted stock unit grant held by the reporting person prior to the spin-off. The restricted stock units vest in May 2017, May 2018 and May 2019.
(4)  Consists of restricted stock units granted under the Fourth Amended and Restated Emergent BioSolutions Inc. 2006 Stock Incentive Plan.
(5)  These restricted stock units vest in three equal annual installments beginning on the earlier of (i) the anniversary of the date of grant or (ii) one business day prior to date of the Company's next annual meeting; provided that the individual is serving on the Board on such date.
(6)  Consists of an option granted on May 22, 2014 under the company's stock incentive plan as amended and restated. In connection with the spin-off on August 1, 2016, the reporting person received a grant of additional stock options as a result of an adjustment to preserve the pre-spin intrinsic value of an existing stock option grant. The adjustments included an adjustment to the stock option price of the grant.
(7)  In connection with the spin-off (the "Spin-off") of Aptevo Therapeutics Inc. from Emergent BioSolutions Inc. ("Emergent"), on August 1, 2016 the reporting person received a grant of stock options as a result of an adjustment to an existing Emergent stock option grant held by the reporting person prior to the Spin-off. The stock options vest in May 2017.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Harsanyi Zsolt
400 PROFESSIONAL DR, SUITE 400
GAITHERSBURG, MD 20879 		X



Signatures
/s/ Eric Burt, Attorney-in-fact 5/26/2017
** Signature of Reporting Person Date


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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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