Kantar
Kantar is an international market research, data and consultancy group headquartered in London, England, whose findings are quoted daily by British newspapers, broadcasters and online news services. When a news report cites polling on consumer confidence, a ranking of the world's most valuable brands, supermarket market shares or television audience behaviour, there is a substantial chance that the underlying numbers came from Kantar. The group describes its work in terms of brand guidance, brand strategy, consumer and shopper behaviour, advertising effectiveness, social media monitoring, design strategy and public opinion, and it employs approximately 20,000 people across more than 90 countries. For a media directory, Kantar belongs in the agencies category not because it publishes news itself, but because it is a primary source factory for news: its surveys, panels and indices generate the statistics around which a large share of business, retail, media and political reporting is built.
Origins inside WPP
Kantar was founded in 1992 as the market research, insight and consultancy division of WPP, the London-based advertising and communications group built by Sir Martin Sorrell. Rather than starting as a single research firm, it was created as an umbrella for research businesses WPP had been acquiring, and it grew by continuing to buy established names in the sector. That origin explains both its scale and its historically complicated structure: for many years Kantar was less a single company in the public eye than a network of specialist operating brands, each with its own reputation among clients, operating under common ownership. In September 2016 the group simplified that presentation by rebranding its operating brands with the Kantar prefix, and in April 2019 it went further, unifying its legacy brands and consolidating its services and offerings under the single Kantar name. The move was intended to make a sprawling research federation legible as one business to global clients who bought several of its services at once.
Ownership change and the Bain Capital era
The defining corporate event of Kantar's recent history was WPP's decision to sell control of the business. On 24 October 2018 the WPP board approved plans to sell Kantar Group. In July 2019 WPP sold a 60 percent stake to Bain Capital Private Equity for $3.1 billion, in a transaction that valued Kantar at about $4.0 billion, while retaining a 40 percent holding. That structure remains the ownership picture recorded for the group: Bain Capital as majority owner, WPP as a significant minority shareholder. The sale turned Kantar from a division of an advertising holding company into a standalone, private-equity-backed data business, with its own investment priorities. Subsequent portfolio moves, including the separation of its media measurement arm and the combination of its consumer panel businesses described below, have all taken place under that ownership model, in which individual divisions can be built, separated or sold as distinct assets.
Leadership
Leadership of the group changed several times during the transition out of WPP. Eric Salama, who had been with Kantar since it was bought by WPP in 1988 in an earlier form, stepped down as chief executive in December 2019. In January 2020 Ian Griffiths, formerly chief financial officer and chief operating officer at ITV, was named chief financial officer, while Adam Crozier was appointed chairman. Alexis Nasard became chief executive effective 30 December 2020, but stepped down on 27 April 2021. Chris Jansen was then appointed, taking over as chief executive effective 1 November 2021. Paul Zwillenberg took over the role of chief executive from Jansen effective 1 January 2026. That sequence matters for readers tracing Kantar's output over time, because the group's strategy — simplification under one brand, investment in technology platforms, and the reshaping of its media and panel divisions — was set across those successive administrations rather than by a single long-serving chief executive.
How the group was assembled: BMRB, TNS and Millward Brown
Much of Kantar's British research heritage predates the Kantar name itself. The British Market Research Bureau, known as BMRB, was established in London in 1933 and was acquired by the group in 2009, later being merged into Kantar Public in 2016. BMRB's Target Group Index, established in 1969 and known across the media industry as TGI, was split and merged into the Kantar Media brand in 2009. A still larger acquisition was Taylor Nelson Sofres, or TNS, acquired by WPP for £1.6 billion in October 2008, when it became part of Kantar Group. TNS itself traced its history back to the establishment of National Family Opinion in the United States in 1946, and by acquisition it had become a global research group listed on the London Stock Exchange and formerly a constituent of the FTSE 250 Index. Other famous names folded into the group included Millward Brown, long associated with advertising research and brand tracking. The practical effect for news users is that series described in older reporting under the names TNS, BMRB or Millward Brown and newer series published simply as Kantar are often continuations of the same research traditions.
Worldpanel, Numerator and shopper data
Kantar's most frequently cited British output has often come from its consumer panel work, historically branded Worldpanel, which tracks shopper behaviour for fast-moving consumer goods manufacturers and retailers. Its grocery market share figures are a fixture of British business reporting, regularly used by newspapers and broadcasters to chart the fortunes of the major supermarket chains. In January 2025 Kantar announced a significant restructuring of this activity, merging its data and technology business Numerator with Worldpanel and dropping the Worldpanel brand name. Kantar had acquired Numerator in 2021, in a deal reportedly worth around $1.5 billion, to support the Worldpanel division and its United States advertising intelligence business. Numerator combines first-party data from US households with technology for consumer insights, while Worldpanel's shopper data business covered 49 countries outside North America. The combined organisation operates globally under the Numerator name, is headquartered in Chicago, employs 5,800 people, and is led by Numerator chief executive Eric Belcher, with Guillaume Bacuvier, formerly Worldpanel's chief executive, leading the international business outside North America. The combined business says it represents first-party data covering almost five billion consumers globally and captures over one million global shopping trips daily. For British readers, the important point is one of attribution: panel-based grocery and shopper stories that were once credited to Kantar Worldpanel now sit inside this combined Numerator structure.
Media measurement and the separation of Kantar Media
Kantar Media historically operated three business models: audience measurement, including its TechEdge software; advertising intelligence; and TGI consumer profiling and targeting. In the United Kingdom its audience work was closely associated with official measurement systems for television, and its TGI data, drawn in Britain from a consumer survey of 25,000 UK adults, has been used by marketers and media planners to profile audiences by demographics, media habits, attitudes and opinions. Kantar separated its media division to operate more independently within the group, giving its leadership greater freedom to set its own investment priorities. That separation proved to be a step towards a full change of ownership: Kantar Media was acquired by H.I.G. Capital in August 2025 and subsequently rebranded as Fifty5Blue, presenting itself as an independent business working with advertisers, agencies, media owners and social platforms on measurement and analytics, with a stated focus on hybrid measurement combining panel data with large-scale datasets, supported by technology and artificial intelligence tools, under global chief executive Patrick Béhar. News reports that still refer to current audience measurement work as Kantar Media are therefore using a name that has since changed.
BrandZ and brand valuation work
Among Kantar's best-known publications is BrandZ, its brand valuation ranking programme. BrandZ lists of the most valuable global and national brands are widely reported by financial and marketing media, and recent editions have presented the rankings through Kantar's framework of brands being meaningful, different and salient, and through its Blueprint for Brand Growth, which argues that brands grow by being meaningfully different to more people, by predisposing more consumers to choose them, by being more present, and by finding new spaces for growth. Whether or not readers accept that framework, the rankings themselves function as news: a change in the reported value of a major technology, retail or banking brand, or its entry into or exit from a national top list, is routinely treated by business desks as a story in its own right and as evidence in wider reporting about consumer markets.
Public opinion and social research
Kantar's public and social research tradition, which absorbed BMRB's long history of working for government and public bodies, covers public opinion polling, social research and evaluation for public policy. Political polling is the most visible part of this work for general news audiences, but the larger volume of activity lies in research for public services: studies of public attitudes, service users and policy outcomes that are published by departments and agencies and then reported by the press. This is also the part of Kantar most directly connected to its London identity, since British social research of this kind is commissioned, designed and analysed largely in the capital, close to the government departments, regulators and national media organisations that consume it. In a directory of news sources, that role is worth recording precisely: Kantar is not a commentator on polling, it is one of the firms that produces the polling other outlets comment on.
How journalists use Kantar
Newsrooms use Kantar in three distinct ways. First, as a wire-like source of scheduled statistics: grocery shares, brand rankings and consumer confidence readings arrive on a predictable cycle and are written up as standalone business stories. Second, as supporting evidence inside larger stories, where a Kantar panel figure or TGI profile is used to show how consumers are actually behaving, as opposed to how companies say they are behaving. Third, through its syndicated studies and audience activation products, which have drawn on studies including Worldpanel, ComTech, TGI and US Monitor to let marketers identify audiences across sectors such as automotive, consumer electronics, financial services, food and dining, health, media and entertainment, political advocacy, sports, telecoms and travel. In each case the journalistic value depends on the same quality: the data are collected continuously, by a consistent method, from panels and surveys large enough to support comparison over time.
Scale, competitors and position
Kantar has consistently been counted among the world's largest insight and consultancy groups, with major competitors historically including GfK, Nielsen and Ipsos. Its claimed client reach has at times been described as covering more than half of the Fortune Top 500 companies. Its present scale — approximately 20,000 employees in more than 90 countries, down from the roughly 28,000 to 30,000 staff across about 100 countries reported in its WPP era — reflects the separations of businesses such as its media division as much as any contraction in demand for research. Headquartered in London, majority-owned by Bain Capital with WPP retaining 40 percent, and now led by Paul Zwillenberg, Kantar remains one of the principal industrial producers of the consumer, media and public opinion data on which British and international news reporting depends.
