Comscore Releases December 2009 Ranking of Top Ad Networks

AOL Advertising Ranks #1 Among Ad Networks, Followed by Yahoo! Network and Google Ad Network

RESTON, VA, January 14, 2010 – Comscore, Inc. (NASDAQ: SCOR), a leader in measuring the digital world today reported the top 15 ad networks based on their reach among U.S. Internet users in December 2009. The ranking showed that AOL Advertising remains the top ad network, reaching 187 million U.S. Internet users, or 91 percent of the total audience, followed by Yahoo! Network (180.9 million) and Google Ad Network (178.1 million). The fastest growing ad network by audience reach among the top 15 was Microsoft Media Network U.S., which grew 31 percent versus year ago, followed by Collective Network (up 22 percent) and Audience Science (up 16 percent).

Top 15 Ad Networks
December 2009 vs. December 2008
Total U.S. – Home/Work/University Locations
Source: Comscore Media Metrix
  Total Unique Visitors (000)
Dec-2008 Dec-2009 % Change
Total Internet : Total Audience 190,650 205,709 8
AOL Advertising 173,804 187,023 8
Yahoo! Network 165,879 180,909 9
Google Ad Network 157,131 178,134 13
ValueClick Networks 159,420 170,774 7
Microsoft Media Network US 126,158 165,470 31
Specific Media 153,079 165,230 8
FOX Audience Network N/A 156,981 N/A
24/7 Real Media 142,448 155,856 9
Collective Network 126,294 153,905 22
interCLICK 137,076 148,989 9
Tribal Fusion 139,778 147,169 5
AudienceScience (formerly Revenue Science) 126,261 146,428 16
Traffic Marketplace 147,024 144,115 -2
Adconion Media Group 142,133 141,235 -1
Turn, Inc 123,150 138,297 12

“Ad networks continue to be a powerful mechanism for delivering a large audience online, with eight different networks reaching at least 75 percent of the entire U.S. online population,” said Comscore senior vice president Jeff Hackett. “Increasingly, however, ad networks are improving their capability for reaching more targeted audiences as well, which delivers enhanced value to advertisers and helps sustain higher CPMs for the channel. 2010 should bring us continued innovation and performance from this growing online sector.”

About Comscore
Comscore, Inc. (NASDAQ: SCOR) is a global leader in measuring the digital world and preferred source of digital marketing intelligence. For more information, please visit

Bill Daddi
Daddi Brand Communications

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