RESTON, VA, September 16, 2015 – Comscore, Inc. (NASDAQ: SCOR), a global media measurement and analytics company, today released its monthly Comscore qSearch™ analysis of the U.S. desktop search marketplace. Google Sites led the explicit core search market in August with 63.8 percent of search queries conducted.

U.S. Explicit Core Search

Google Sites led the U.S. explicit core search market in August with 63.8 percent market share, followed by Microsoft Sites with 20.6 percent (up 0.2 percentage points) and Yahoo Sites with 12.7 percent. Ask Network accounted for 1.8 percent of explicit core searches, followed by AOL, Inc. with 1.2 percent.

Comscore Explicit Core Search Share Report* (Desktop Only)

August 2015 vs. July 2015

Total U.S. – Desktop Home & Work Locations

Source: Comscore qSearch Core Search Entity Explicit Core Search Share (%) Jul-15 Aug-15 Point Change Total Explicit Core Search 100.0% 100.0% N/A Google Sites 64.0% 63.8% -0.2 Microsoft Sites 20.4% 20.6% 0.2 Yahoo Sites 12.7% 12.7% 0.0 Ask Network 1.8% 1.8% 0.0 AOL, Inc. 1.2% 1.2% 0.0

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

reflect specific user intent to interact with the search results.

17.6 billion explicit core searches were conducted in August, with Google Sites ranking first with 11.3 billion. Microsoft Sites ranked second with 3.6 billion searches (up 1 percent), followed by Yahoo Sites with 2.2 billion, Ask Network with 310 million and AOL, Inc. with 215 million (up 4 percent).

Comscore Explicit Core Search Query Report (Desktop Only)

August 2015 vs. July 2015

Total U.S. – Desktop Home & Work Locations

Source: Comscore qSearch Core Search Entity Explicit Core Search Queries (MM) Jul-15 Aug-15 Percent Change Total Explicit Core Search 17,654 17,640 0% Google Sites 11,293 11,256 0% Microsoft Sites 3,596 3,627 1% Yahoo Sites 2,246 2,233 -1% Ask Network 313 310 -1% AOL, Inc. 206 215 4%

“Powered By” Reporting

In August, 64.9 percent of searches carried organic search results from Google, while 31.3 percent of searches were powered by Bing (up 0.3 percentage points).

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About Comscore

Founded in 1999 and headquartered in Reston, Virginia, Comscore, Inc. (NASDAQ: SCOR) is a global media measurement and analytics company that makes audiences and advertising more valuable. Comscore helps media buyers and sellers understand and make decisions based on how consumers use different media, such as TV, video, mobile, desktop and more. Through its products and partnerships, Comscore helps its more than 2,500 clients understand their audiences, know if their advertising is working, and access data where they want and need it. Please visit www.comscore.com to learn more.