Ownership Submission
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

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 *
WPP plc
   2. Issuer Name and Ticker or Trading Symbol
COMSCORE, INC. [SCOR] 		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)
27 FARM STREET		 3. Date of Earliest Transaction (Month/Day/Year)
01/29/2016
(Street)

LONDON, X0 W1J 5RJ		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ 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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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 01/29/2016   J(1)   3,493,572 A (1) 3,493,572 I See Footnote (2)
Common Stock               7,021,124 I See Footnote (3)

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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 (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 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
(Month/Day/Year)		 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
WPP plc
27 FARM STREET
LONDON, X0 W1J 5RJ		     X    
WPP Luxembourg Gamma Three S.a.r.l.
124 BOULEVARD DE LA PETRUSSE
LUXEMBOURG, N4 L-2330		     X    
Cavendish Square Holding B.V.
LAAN OP ZUID 167
3072 DB ROTTERDAM, P7 		     X    

Signatures

 WPP plc By: /s/ Paul Richardson, Global Finance Director   01/29/2016
**Signature of Reporting Person Date
 Cavendish Square Holding B.V. By: /s/ A. Van Heulen-Mulder, Managing Director   01/28/2016
**Signature of Reporting Person Date
 WPP Luxembourg Gamma Three S.a r.l. By: /s/ Anne Ehrismann, Manager   01/29/2016
**Signature of Reporting Person Date
 By: /s/ Thierry Lenders, Manager   01/29/2016
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) These shares were received upon the completion of, and as a result of the merger of Rentrak Corporation ("Rentrak") into Rum Acquisition Corporation, a wholly owned subsidiary of comScore, Inc. on January 29, 2016 (the "Merger"). These shares were received in exchange for 3,037,889 shares of Rentrak common stock that WPP Luxembourg Gamma Three S.a r.l. ("Lux Gamma Three") owned immediately prior to the Merger. On the effective date of the Merger, the closing price of Rentrak's common stock was $44.47 per share.
(2) These shares are owned directly by Lux Gamma Three, which is a wholly-owned subsidiary of WPP plc that WPP plc owns indirectly through a series of intervening holding companies. WPP plc is an indirect beneficial owner of the reported securities. Lux Gamma Three disclaims beneficial ownership of these shares.
(3) These shares are owned directly by Cavendish Square Holding B.V. ("Cavendish"), which is a wholly-owned subsidiary of WPP plc that WPP plc owns indirectly through a series of intervening holding companies. WPP plc is an indirect beneficial owner of the reported securities. Cavendish disclaims beneficial ownership of these shares.

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