Top ad buyers on Google and Yahoo! Search in January 2006

According to Nielsen//NetRatings data, the following advertisers purchase the largest amount of ad impressions on Google:

1. eBay – 984.2 mln impressions in January 2006
2. Shopping.com – 447.59 mln
3. Local.com – 279.25 mln
4. Target – 218.14 mln
5. Expedia – 197.33 mln

The following advertisers bought the largest amount of impressions on Yahoo! search engine.

1. eBay – 537 mln impressions in January 2006
2. Shopping.com – 501.2 mln
3. University of Phoenix – 151.64 mln
4. LengingTree – 116.3 mln
5. Target – 79 mln.