Sec Form 4/A Filing - Emergent BioSolutions Inc. @ Aptevo Therapeutics Inc. - 2016-07-29

FORM 4/A 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 Emergent BioSolutions Inc. 2. Issuer Name and Ticker or Trading Symbol Aptevo Therapeutics Inc. [ APVO] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 400 PROFESSIONAL DR, SUITE 400 3. Date of Earliest Transaction (MM/DD/YY) 07/29/2016 (Street) GAITHERSBURG, MD20879 4. If Amendment, Date Original Filed (MM/DD/YY) 08/02/2016 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, par value $0.001 per share 07/29/2016 J( 1 ) 20,228,849 ( 3 ) A $ 0 ( 1 ) 20,229,849 ( 3 ) D Common Stock, par value $0.001 per share 08/01/2016 J( 2 ) 20,229,849 ( 3 ) D $ 0 ( 2 ) 0 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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Emergent BioSolutions Inc. 400 PROFESSIONAL DR, SUITE 400 GAITHERSBURG, MD20879 X Signatures /s/ Eric Burt, Assistant Secretary 08/04/2016 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On July 29, 2016, Aptevo Therapeutics Inc. ("Aptevo") issued 20,228,849 shares of its common stock to its parent, Emergent Biosolutions Inc ("Emergent"), as partial consideration for Emergent's transfer of its biosciences business to Aptevo. ( 2 )On August 1, 2016, Emergent made a pro rata distribution of 100% of the outstanding shares of Aptevo common stock to Emergent stockholders of record as of July 22, 2016, the record date for the distribution. ( 3 )This Form 4/A is being filed to correct a typographical error on the shares acquired, disposed of, and beneficially owned following the acquisition.

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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