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Comscore Releases November 2012 U.S. Search Engine Rankings

RESTON, VA, December 12, 2012 – Comscore, Inc. (NASDAQ: SCOR), a leader in measuring the digital world, today released its monthly Comscore qSearch analysis of the U.S. search marketplace. Google Sites led the explicit core search market in November with 67 percent of search queries conducted.

U.S. Explicit Core Search

Google Sites led the U.S. explicit core search market in November with 67 percent market share (up 0.1 percentage points), followed by Microsoft Sites with 16.2 percent (up 0.2 percentage points) and Yahoo! Sites with 12.1 percent. Ask Network accounted for 3 percent of explicit core searches, followed by AOL, Inc. with 1.7 percent.

Comscore Explicit Core Search Share Report*

November 2012 vs. October 2012

Total U.S. – Home & Work Locations

Source: Comscore qSearch Core Search Entity Explicit Core Search Share (%) Oct-12 Nov-12 Point Change Total Explicit Core Search 100.0% 100.0% N/A Google Sites 66.9% 67.0% 0.1 Microsoft Sites 16.0% 16.2% 0.2 Yahoo! Sites 12.2% 12.1% -0.1 Ask Network 3.2% 3.0% -0.2 AOL, Inc. 1.8% 1.7% -0.1

*“Explicit Core Search” excludes contextually driven searches that do not

reflect specific user intent to interact with the search results.

Nearly 17 billion explicit core searches were conducted in November, with Google Sites ranking first with 11.4 billion. Microsoft Sites ranked second with 2.7 billion searches, followed by Yahoo! Sites with 2.1 billion, Ask Network with 506 million and AOL, Inc. with 297 million.

Comscore Explicit Core Search Query Report

November 2012 vs. October 2012

Total U.S. – Home & Work Locations

Source: Comscore qSearch Core Search Entity Explicit Core Search Queries (MM) Oct-12 Nov-12 Percent Change Total Explicit Core Search 17,623 16,957 -4% Google Sites 11,787 11,359 -4% Microsoft Sites 2,819 2,741 -3% Yahoo! Sites 2,147 2,054 -4% Ask Network 560 506 -10% AOL, Inc. 309 297 -4%

“Powered By” Reporting

In November, 69.4 percent of searches carried organic search results from Google, while 25.4 percent of searches were powered by Bing (up 0.4 percentage points).

About Comscore

Comscore, Inc. (NASDAQ: SCOR) is a global leader in measuring the digital world and preferred source of digital business analytics. For more information, please visit www.comscore.com/companyinfo.

Contact:

Adam Lella

Comscore, Inc.

+1 (312) 775-6474

press@comscore.com