U.S. Internet advertising revenues for the first half of 2010, totaled $12.1 billion a 11.3 percent increase over the same period in 2009 reports the Interactive Advertising Bureau (IAB).

Digital video experienced record growth, this year achieving the highest half-year performance ever and up 31 percent over first half 2009. Display-related advertising—which includes banner ads, rich media, digital video and sponsorships—totaled more than $4.4 billion in the first six months of 2010, showing a significant increase of close to 16 percent over the same period in 2009. Search advertising remains the largest percentage of overall interactive spend at 47 percent, representing more than $5.7 billion for the first six months of 2010, up 11.6 percent from the same period in 2009.

The table below highlights key first six-month revenue data breakouts.

($ millions if not indicated):
Advertising Formats: Search and Display-related ads continue to be leading formats.

Industry Concentration: Percentages of revenues by the top 10, top 25 and top 50 have remained consistent.