Nielsen

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Last updated October 24, 2026

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Overview

Nielsen is a global measurement and data company whose principal business is measuring what audiences watch and translating that information into insights for media owners, advertisers, agencies, and technology companies. The company is best known for television ratings, but its activities have historically covered radio, digital video, mobile media, advertising effectiveness, consumer research, marketing analytics, sports measurement, and media metadata. The business originated in 1923, when Arthur C. Nielsen Sr. established the AC Nielsen Company. Nielsen initially developed engineering and performance surveys, then expanded into retail measurement. Its retail index, introduced in the 1930s, enabled manufacturers to compare their sales with total category sales and helped make “market share” a practical management concept. During the 1930s and 1940s the company moved into audience measurement, first for radio and later for television. The resulting Nielsen ratings became a central currency for buying and selling advertising and for evaluating the reach of broadcast programming. Nielsen’s traditional portfolio was divided for much of its history between Nielsen Media Research, focused on media audiences, and AC Nielsen, focused on consumer purchasing, retail trends, and related commercial data. The two businesses were separated by Dun & Bradstreet in 1996 and later recombined under VNU, which acquired Nielsen Media Research in 1999 and AC Nielsen in 2001. VNU was acquired by a private-equity consortium in 2006, and the renamed Nielsen Company returned to the public markets in 2011. The company expanded its measurement capabilities through acquisitions and partnerships. These included radio measurement through Arbitron, social television analytics through SocialGuide, advertising and viewer-engagement research through IAG Research, digital and programmatic advertising data through exelate, sports intelligence through Repucom, and media metadata through Gracenote. Nielsen also invested in consumer neuroscience, mobile measurement, marketing decision systems, and innovation research. In 2021 Nielsen sold its Global Connect business, the former AC Nielsen consumer and retail operation, to Advent International. The divested business became NielsenIQ, leaving Nielsen focused primarily on media audience measurement and analytics. In 2022 a consortium led by Evergreen Coast Capital and Brookfield Business Partners completed a transaction to take Nielsen private. The company continues to operate internationally, measuring television, streaming, digital, audio, and other forms of media consumption, while developing cross-platform systems intended to provide comparable audience and advertising metrics across devices and services.

History

Arthur C. Nielsen Sr. founded the AC Nielsen Company in 1923. The original business developed engineering and performance surveys, but the company soon moved toward measuring commercial activity at scale. In 1932 Nielsen introduced a retail index that tracked food and drug purchases. By comparing a manufacturer’s sales with the estimated total market, the index made market share a measurable management tool. Nielsen entered audience measurement after acquiring the Audimeter in 1936. The device recorded which radio stations a receiver was tuned to, and the company used the resulting information to establish a national radio rating service in 1942. Audience data was sold to broadcasters, advertisers, and manufacturers seeking information about program popularity and listener demographics. Television measurement began in 1950. Nielsen used sampled households, measurement devices, and viewer diaries to estimate program audiences and demographic composition. In the 1980s the company introduced the people meter, which asked household members to identify themselves when watching. This was designed to distinguish television sets that were switched on from actual individual viewing. The company’s ownership and structure changed repeatedly. Dun & Bradstreet acquired Nielsen in 1984 and divided it in 1996 into Nielsen Media Research and AC Nielsen. VNU acquired Nielsen Media Research in 1999 and recombined it with AC Nielsen in 2001. In 2006 VNU was acquired by a consortium of private-equity firms. The business was renamed The Nielsen Company, and it expanded through acquisitions in mobile, digital advertising, social media, neuroscience, sports, and media metadata. Nielsen became publicly traded again in 2011 through a New York Stock Exchange initial public offering. It acquired Arbitron in 2013, strengthening its position in radio measurement, and continued adding digital, advertising, consumer, and sports capabilities. The legal parent moved from the Netherlands to England and Wales through a 2015 cross-border merger, without changing the underlying operating business. As media consumption fragmented across television, computers, mobile devices, and streaming services, Nielsen introduced cross-screen reporting and digital content measurement. It also retired paper diaries in local television measurement in favor of electronic methods. The company later simplified its portfolio by selling Global Connect to Advent International in 2021. That transaction separated the former consumer and retail measurement business, which became NielsenIQ, from Nielsen’s media-focused operations. A consortium led by Evergreen Coast Capital and Brookfield Business Partners completed a $16 billion take-private transaction in 2022. Nielsen remains an international media measurement and analytics company.

2022
Take-private transaction completed
[1]Nielsen Holdingsen.wikipedia.org
A consortium led by Evergreen Coast Capital and Brookfield Business Partners completed the acquisition of Nielsen.
2021
Global Connect sold
[1]Nielsen Holdingsen.wikipedia.org
Nielsen completed the sale of its Global Connect business to Advent International; the business became NielsenIQ.
2016
Digital Content Ratings syndicated
[1]Nielsen Holdingsen.wikipedia.org
Nielsen made Digital Content Ratings available in full syndication for clients.
2015
Legal parent moved to England and Wales
[1]Nielsen Holdingsen.wikipedia.org
A cross-border merger changed the domicile of Nielsen’s publicly traded parent company.
2013
Arbitron acquisition completed
[1]Nielsen Holdingsen.wikipedia.org
Nielsen completed its acquisition of Arbitron, expanding its radio audience measurement capabilities.
2011
New York Stock Exchange listing
[1]Nielsen Holdingsen.wikipedia.org
Nielsen completed an initial public offering and began trading under the symbol NLSN.
2001
Nielsen businesses recombined under VNU
[1]Nielsen Holdingsen.wikipedia.org
VNU brought Nielsen Media Research and AC Nielsen back together.
1996
Business divided into two companies
[1]Nielsen Holdingsen.wikipedia.org
Dun & Bradstreet separated Nielsen Media Research from AC Nielsen.
1984
Acquired by Dun & Bradstreet
[1]Nielsen Holdingsen.wikipedia.org
Dun & Bradstreet acquired Nielsen.
1950
Television audience measurement begins
[1]Nielsen Holdingsen.wikipedia.org
Nielsen began measuring television audiences in the United States.
1942
National radio ratings launched
[1]Nielsen Holdingsen.wikipedia.org
Nielsen began a national radio rating service based on sampled households.
1936
Audimeter acquired
[1]Nielsen Holdingsen.wikipedia.org
The company acquired the Audimeter, an early device for recording radio-station tuning.
1932
Retail index introduced
[1]Nielsen Holdingsen.wikipedia.org
Nielsen introduced a retail measurement index that helped establish market share as a practical business metric.
1923
Company founded
[1]Nielsen Holdingsen.wikipedia.org
Arthur C. Nielsen Sr. founded the AC Nielsen Company, initially focusing on engineering and performance surveys.

Products and positioning

Independent, cross-platform media audience measurement and analytics provider.

Television audience measurement · 1950
Nielsen Ratings
Nielsen’s traditional television ratings estimate the size and demographic composition of program audiences using sampled households and electronic measurement. The ratings became a standard reference for broadcasters, networks, advertisers, and agencies evaluating program reach and advertising inventory.
Digital audience measurement · 2016
Digital Content Ratings
Digital Content Ratings measure audiences consuming digital video and other online content. They extend Nielsen’s audience methodology beyond conventional television and support comparisons across computers, mobile devices, and connected environments.
Cross-platform measurement
Nielsen ONE
Nielsen ONE is a cross-media measurement initiative intended to provide comparable views of audiences and advertising across linear television, streaming, digital, and other platforms. It reflects the company’s effort to address fragmented media consumption with unified measurement.
Radio and audio measurement · 2013
Nielsen Audio
Nielsen Audio provides audience measurement and analytics for radio and audio services. Its capabilities were strengthened through the acquisition of Arbitron, extending Nielsen’s historical work in radio measurement into a broader audio environment.
Media metadata
Gracenote
Gracenote provides metadata and related identification information for music, television, film, and other entertainment content. Nielsen acquired the business to strengthen the data infrastructure supporting media discovery, classification, and measurement.
Advertising intelligence
Nielsen Ad Intel
Nielsen’s advertising intelligence services track advertising activity and provide market participants with information used to evaluate competitive spending, media placement, and campaign activity.

Controversies

2021
Nielsen settles Cheryl Grace discrimination lawsuit
Nielsen Holdings settled a federal discrimination lawsuit filed by former executive Cheryl Grace, who had alleged racial bias and a hostile work environment. The settlement terms are confidential; the article reports the allegations and settlement but no court finding on their merits.
Source
2020
CF Entertainment sues Nielsen over ratings fees
CF Entertainment filed a lawsuit against Nielsen, accusing the ratings company of breach of contract, unfair competition, and unjust enrichment in connection with increased monthly ratings fees. The filing sets out CF Entertainment's allegations regarding the higher fees. These are claims asserted in the lawsuit and do not represent a court determination on the matter.
Source 1 Source 2

2022
Take-private acquisitionM&A
Background
After receiving and rejecting an earlier lower offer, Nielsen’s board considered a larger proposal from a private-equity consortium.
Action taken
Nielsen accepted a reported $16 billion offer led by Evergreen Coast Capital and Brookfield Business Partners; completion occurred in October 2022.
Aftermath
Nielsen ceased to be publicly traded and continued as a privately held media measurement company.
Transaction value. $16 billion (Announced March 2022; completed October 2022)
Source
2021
Divestiture of Global ConnectM&A
Background
Nielsen separated its consumer and retail measurement activities from its media measurement business as part of a portfolio-simplification strategy.
Action taken
The Global Connect business was sold to Advent International and subsequently operated as NielsenIQ.
Aftermath
Nielsen became primarily a media audience measurement and analytics company, while NielsenIQ continued separately in consumer and retail intelligence.
Source

Recent events

2023
Karthik Rao appointed Nielsen chief executive officer[1]Nielsen Holdingsen.wikipedia.org
Leadership change
Karthik Rao became CEO, with David Kenny moving to the executive chairman role.
2023
Karthik Rao named Nielsen chief executive[1]Nielsen Holdingsen.wikipedia.org
Leadership change
Karthik Rao succeeded David Kenny as chief executive, while Kenny became executive chairman.
2022
Nielsen agrees to $16 billion take-private transaction[1]Nielsen Holdingsen.wikipedia.org
M&A
Nielsen accepted an acquisition offer from a consortium led by Evergreen Coast Capital and Brookfield Business Partners after rejecting an earlier lower bid.
2022
Nielsen completes take-private transaction[1]Nielsen Holdingsen.wikipedia.org
M&A
The acquisition consortium completed the transaction, ending Nielsen’s period as a publicly traded company.
2022
Nielsen accepts approximately $16 billion take-private offer[1]Nielsen Holdingsen.wikipedia.org
M&A
Nielsen agreed to be acquired by a consortium led by Evergreen Coast Capital and Brookfield Business Partners after the board rejected an earlier lower offer.
2022
Nielsen completes acquisition by private-equity consortium[1]Nielsen Holdingsen.wikipedia.org
M&A
The transaction closed in October 2022, ending Nielsen’s listing on the New York Stock Exchange.
2021
Nielsen completes sale of Global Connect business to Advent International[1]Nielsen Holdingsen.wikipedia.org
M&A
Nielsen completed the divestiture of its Global Connect business, subsequently known as NielsenIQ, and became primarily focused on media measurement and analytics.

Sources19 sources

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