Today, Nielsen is one of the largest businesses of The Nielsen Company, a global information and media company with leading market positions and recognized brands in marketing information (Nielsen), media information (Nielsen Media Research), business publications (Billboard, The Hollywood Reporter, Adweek) and trade shows. The privately held company has more than 42,000 employees and is active in more than 100 countries, with headquarters in Haarlem, the Netherlands, and New York, USA. The company's acquisition of Nielsen in 2001 reunited the business with Nielsen Media Research under the same corporate parent.

Nielsen is playing a leading role in the development of a new generation of Nielsen business solutions for client’s marketing issues. Nielsen Advisory Services is comprised of a broad spectrum of Nielsen marketing information-based companies including Nielsen, Spectra, BASES, Claritas and HCI. Nielsen Advisory Services also draws on the resources of all Nielsen marketing information-related businesses as well as other Nielsen businesses and third party capabilities to develop new, integrated services and approaches to client service.

Nielsen is also collaborating with members of the Nielsen Media Measurement & Information businesses, especially Nielsen Media Research, on new services that integrate consumer-focused marketing and media information.

Nielsen's Business Media interests include such publications as Adweek, Convenience Store News and Progressive Grocer, among other leading trade magazines. Nielsen Business Media is also a leading producer of trade shows and conferences.