Top 100 B-to-B Advertisers Spent $4.8 Billion on B-to-B Ads

The top 100 b-to-b advertisers accounted for nearly half of all b-to-b spending last year.

http://adage.com/article/btob/top-100-b-b-advertisers-spent-4-8-billion-b-b-ads/300042/