SEC Form 4

FORM 4		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 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* WPP plc (Last) (First) (Middle) 27 FARM STREET (Street) LONDON X0 W1J 5RJ (City) (State) (Zip)	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)
	3. Date of Earliest Transaction (Month/Day/Year) 01/29/2016
	4. If Amendment, Date of 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

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)

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 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: 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

1. Name and Address of Reporting Person* WPP plc (Last) (First) (Middle) 27 FARM STREET (Street) LONDON X0 W1J 5RJ (City) (State) (Zip)

1. Name and Address of Reporting Person* WPP Luxembourg Gamma Three S.a.r.l. (Last) (First) (Middle) 124 BOULEVARD DE LA PETRUSSE (Street) LUXEMBOURG N4 L-2330 (City) (State) (Zip)

1. Name and Address of Reporting Person* Cavendish Square Holding B.V. (Last) (First) (Middle) LAAN OP ZUID 167 (Street) 3072 DB ROTTERDAM P7 (City) (State) (Zip)

Explanation of Responses:

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.

Remarks:

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