James Attwood Jr. is Nielsen's non-executive chairman, and David Kenny is Nielsen's Chief Executive Officer. James Attwood succeeded Dave Calhoun as Executive Chairman in January 2016. Prior to joining Nielsen as CEO in 2006, Dave Calhoun served as Vice Chairman of the General Electric Company and President and Chief Executive Officer of GE Infrastructure, the largest of six GE business units. He served as Nielsen CEO from to 2006 to 2014, when he was succeeded by Mitch Barns. Barns joined Nielsen in 1997, and has held various roles in Europe, Asia, and North America leading major parts of the business. On December 3, 2018, David Kenny was named CEO of Nielsen, succeeding Mitch Barns. While the Nielsen brand is most often associated with television ratings, those TV rating services comprise approximately one-quarter of the company's business and revenues. After substantial work to simplify the company over the last several years, Nielsen today aligns its business into two reporting segments: Buy (consumer purchasing measurement and analytics) and Watch (media audience measurement and analytics). What consumers buy Nielsen's Buy segment (approx. 45% of global revenues) primarily helps packaged goods companies, retailers, and Wall Street analysts understand what consumers are buying in terms of categories, brands and products. The company's aim is to measure all consumer purchases as buying behavior continues to fragment across channels and segments. For example, it is Nielsen's data that measures how much Diet Coke vs. Diet Pepsi is sold in stores, or how much Crest versus Colgate toothpaste is sold. Nielsen accomplishes this by purchasing and analyzing huge amounts of retail data that measures what is being sold in the store, and then combines it with household panel data that captures everything that is brought into the home. These measures of sales performance also fuel a range of forward-looking analytics to help clients improve the precision and efficiency of their advertising spending, maximize the impact of their promotion budgets and optimize their product assortment. They also can provide insights into how changes in product offerings, pricing or marketing would change sales. Major clients include The Coca-Cola Company, Nestlé S.A., The Procter & Gamble Company, Unilever Group, and Walmart. While the United States is the company's largest market, Nielsen is a global company. In the Buy business, it covers 106 countries representing more than 90% of the world's population. What consumers watch Nielsen's Watch segment (approx. 55% of global