Microsoft, Apple and AT&T topped the BtoB 100 list, an Ad Age special report coming out Monday that ranks the biggest b-to-b ad spenders in the U.S.
The report is based on Ad Age DataCenter's analysis of spending data from WPP's Kantar Media.
It found that U.S. measured-media spending by the top 100 b-to-b advertisers approached $5 billion last year.
The report and ranking of the top 100 b-to-b advertisers will appear in Ad Age's Aug. 11 print edition.
An overview article of the report will be accessible to all users at AdAge.com/datacenter, and the online ranking will be available to Ad Age DataCenter subscribers.