Press Release

Yahoo! Sites Ranks as Top Display Ad Publisher in March with 43 Billion U.S. Ad Views, According to comScore Ad Metrix

AT&T Ranks as Top Display Advertiser with 6 Billion Ad Views

RESTON, VA, May 12, 2009 – comScore (NASDAQ: SCOR), a leader in measuring the digital world, today released March 2009 data from the comScore Ad Metrix service, showing that Yahoo! Sites ranked as the top display ad publisher and AT&T ranked as the top display advertiser.

Top 10 Online Display Ad Publishers

Yahoo! Sites ranked as the top U.S. display ad publisher in March with 42.8 billion ad views (13.2 percent market share) reaching 139 million people online. Fox Interactive Media ranked second with 31.4 billion ad views (9.7 percent), while Facebook.com captured the third spot with 24.8 billion ad views (7.7 percent).

Top 10 Online Display Ad Publishers*
March 2009
Total U.S. – Home/Work/University Locations
Source: comScore Ad Metrix
Total Display Ad Views (MM) Share of Display Ads Advertising Exposed Unique Visitors (000)
Total Internet 323,647 100.0% 184,002
Yahoo! Sites 42,847 13.2% 138,968
Fox Interactive Media 31,402 9.7% 82,527
Facebook.com 24,847 7.7% 52,931
Microsoft Sites 17,788 5.5% 89,135
AOL LLC 17,380 5.4% 91,272
Google Sites 4,235 1.3% 97,416
eBay 2,811 0.9% 47,991
Viacom Digital 2,367 0.7% 36,876
Glam Media 2,127 0.7% 37,237
CNN 1,984 0.6% 27,616

*Reflects display advertising only, both standard and non-standard IAB sizes; excludes house ads and small ads (<2,500 pixels in dimension)

Top 10 Online Display Advertisers

AT&T ranked as the top display advertiser in March with nearly 6 billion ad views (1.8 percent market share), which reached 147 million people online. A significant theme across AT&T’s display ad campaigns in March was the promotion of free camera phones, including the Sony Ericsson W350. Other top display advertisers included Verizon with 5.7 billion ad views (1.8 percent share), Vonage with 4.3 billion ad views (1.3 percent) and Scottrade with 4 billion ad views (1.2 percent).

Top 10 Online Display Advertisers*
March 2009
Total U.S. – Home/Work/University Locations
Source: comScore Ad Metrix
Total Display Ad Views (MM) Share of Publisher Ad Views Advertising Exposed Unique Visitors (000)
Total Internet 323,647 100.0% 184,002
AT&T, Inc. 5,985 1.8% 147,133
Verizon 5,695 1.8% 144,482
Vonage 4,253 1.3% 139,786
Scottrade 3,983 1.2% 101,102
Experian Interactive 3,320 1.0% 140,480
Sprint Nextel Corporation 3,247 1.0% 129,035
Bank of America 3,152 1.0% 124,883
eBay 3,137 1.0% 140,089
Netflix.com 3,016 0.9% 134,059
Nextag.com 2,585 0.8% 126,943

*Reflects display advertising only, both standard and non-standard IAB sizes; excludes house ads and small ads (<2,500 pixels in dimension)

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 www.comscore.com/companyinfo.

Contact:
Andrew Lipsman
comScore, Inc.
+1 312 775 6510
press@comscore.com