Global leaders of the market research industry include Nielsen Holdings (U.S.), Kantar (UK), IMS Health Holdings (U.S.), Ipsos (France) and GfK (Germany). Nielsen, headquartered in New York City, was by far the largest market research company worldwide in terms of revenue in 2015. That year, the company’s revenue amounted to approximately 6.17 billion U.S. dollars – almost twice that of its closest competitor, Kantar, with revenues of 3.71 billion.
In the United States, market research industry leaders made over ten billion U.S. dollars combined in revenue in 2015. The same companies also employed more than 34 thousand people in the U.S. – Nielsen employees accounted for around one third of this figure.