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Nielsen Holdings plc, commonly known as Nielsen, is a premier American media audience measurement firm. Operating in over 100 countries, the company employs approximately 15,000 people worldwide, providing critical data that helps media businesses understand consumer behavior across various platforms.

Evolution of the Company

Historically, Nielsen was recognized for two primary subsidiaries: Nielsen Media Research, which specialized in television ratings, and AC Nielsen, which focused on consumer shopping trends and box-office data. Over time, these divisions evolved into the Global Media and Global Connect divisions, respectively.

In a significant strategic shift in March 2021, Nielsen divested its Global Connect division (now known as NielsenIQ) to the private equity firm Advent International. This move transformed Nielsen into a pure-play media audience measurement and analytics firm.

Historical Foundations and the Concept of Market Share

The company's roots trace back to 1923, when it was founded by Arthur C. Nielsen, Sr. He is credited with inventing an approach to measuring competitive sales results, which effectively introduced the practical management tool known as "market share."

The Birth of Audience Measurement

Nielsen's influence expanded from retail to media in the mid-20th century. In 1936, the company acquired the Audimeter, a device used to measure radio tuning. By 1942, Nielsen had established a national radio rating service, marking the beginning of modern audience measurement. This service provided manufacturers and advertisers with essential demographic and popularity data regarding radio programming.

Corporate Structure and Leadership

Nielsen has undergone several structural changes, including a change in legal domicile from the Netherlands to the United Kingdom. The company was previously listed on the New York Stock Exchange and was once a component of the S&P 500.

In March 2022, Nielsen accepted a $16 billion buyout offer from a group of private equity investors led by Evergreen Coast Capital Corp. (a subsidiary of Elliott Investment Management) and Brookfield Business Partners. The transaction was finalized in October 2022.

Key Leadership Transitions

• Dave Calhoun: Served as CEO from 2006 to 2014.
• Mitch Barns: Succeeded Calhoun in 2014.
• David Kenny: Served as CEO starting in 2018.
• Karthik Rao: Named CEO in September 2023, succeeding David Kenny.

Global Impact and Services

While many associate the Nielsen brand primarily with television ratings, these services actually comprise only about one-quarter of the company's total business and revenue. Today, Nielsen provides comprehensive data to clients regarding what consumers watch and how their choices intersect across global and local scales, covering more than 90% of the world's GDP and population.