John Lewis

Executive Partner at Madison Dearborn Partners LLC

John Lewis

John Lewis

Executive Partner at Madison Dearborn Partners LLC

Career Highlights

Nielsen NV
Nielsen Audio, Inc.
Nielsen Holdings Plc

RelSci Relationships


Number of Boards






RelSci Relationships are individuals John Lewis likely has professional access to. A relationship does not necessarily indicate a personal connection.

Private Investor at Winona Capital Management LLC

Relationship likelihood: Strong

Managing Director at Madison Dearborn Partners IV LP

Relationship likelihood: Strong

Chairman & Chief Executive Officer at Sientra, Inc.

Relationship likelihood: Strong

Industry Advisor at Silverwood Partners Capital Markets

Relationship likelihood: Strong

Chief Executive Officer at Kantar Retail

Relationship likelihood: Strong

Senior Managing Director, Private Equity at The Blackstone Group LP

Relationship likelihood: Strong

Managing Director at City Capital Advisors LLC

Relationship likelihood: Strong

President & Chief Executive Officer at Full Contact Management LLC

Relationship likelihood: Strong

General Counsel at PJT Partners, Inc.

Relationship likelihood: Strong

Chief Executive Officer at The Nielsen Company

Relationship likelihood: Strong

Paths to John Lewis
Potential Connections via
Relationship Science
John Lewis
Executive Partner at Madison Dearborn Partners LLC

The Kellogg School of Management (The Kellogg School or Kellogg) is the business school of Northwestern University in Evanston, Illinois, with additional campuses in downtown Chicago, Illinois and Miami, Florida. Kellogg offers full-time, part-time, and executive programs, and partners with schools in China, France/Singapore, India, Hong Kong, Israel, Germany, Canada, and Thailand.Founded in 1908 in downtown Chicago as a part-time evening program, the school was chartered to educate business leaders with "good moral character.

Bachelor's Political Science

Princeton University is a vibrant community of scholarship and learning that stands in the nation's service and in the service of all nations. Chartered in 1746, Princeton is the fourth-oldest college in the United States. Princeton is an independent, coeducational, nondenominational institution that provides undergraduate and graduate instruction in the humanities, social sciences, natural sciences and engineering. As a world-renowned research university, Princeton seeks to achieve the highest levels of distinction in the discovery and transmission of knowledge and understanding. At the same time, Princeton is distinctive among research universities in its commitment to undergraduate teaching. Today, more than 1,100 faculty members instruct approximately 5,000 undergraduate students and 2,500 graduate students. The University's generous financial aid program ensures that talented students from all economic backgrounds can afford a Princeton education.

Career History
Co-Global President
1994 - Current

The Nielsen Co. (US) LLC provides marketing and business information. It offers audience segments, audio measurement, consumer neuroscience, and consumer panel measurement, optimization, concept screening and forecasting solutions. The company was founded by Arthur Charles Nielsen Sr. in 1923 and is headquartered in New York, NY.

Executive Partner

Madison Dearborn Partners is an active manager invests in MBO and growth equity transactions. The sectors in which they invest include basic industries, business & government software and services, financial & transactions services, health care and telecom, media & technology services. The firm targets middle and upper-middle market companies located primarily in the United States. They acquire both control and minority positions.

Global President

Nielsen NV is a global performance management company. It provides clients with a comprehensive understanding of consumers and consumer behavior. It delivers critical media and marketing information, analytics and manufacturer and retailer expertise marketing consumer information, television and other media measurement, online intelligence, mobile measurement, trade shows and related assets. The company operates its business through two reporting segments: What Consumers Buy and What Consumers Watch & listen. The What Consumers Buy segment provides retail transactional measurement data, consumer behavior information and analytics primarily to businesses in the consumer packaged goods industry. This segment is organized into two areas: Information, which provides retail scanner and consumer panel-based measurement, and Insights, which provides a broad range of analytics. Its Buy products and services enables clients to better manage their brands, uncover new sources of demand, launch and grow new products, analyze their sales, improve their marketing mix and establish more effective consumer relationships. The What Consumers Watch and listen segment provides viewership and listening data, and analytics primarily to the media and advertising industries for television, radio, online and mobile viewing, and listening platforms. This segment offers national and local television audience measurement services, including more than one screen, unduplicated reach, cause and effect analysis, and program viewing behavior testing; digital audience measurement services, such as digital media and market research, audience analytics, and social media measurement; mobile measurement services comprising measurement and consumer research for telecom and media companies in the mobile telecommunications industry; and advertiser solutions. It provides radio audience measurement services such as information on consumers lifestyles, shopping patterns, and use of media to radio, advertisers and advertising agencies, local cable television companies, national cable and broadcast television networks, and out-of-home media sales organizations. The company was formerly known as Nielsen Holdings NV. The company was founded by Arthur C. Nielsen, Sr. in 1923 and is headquartered in New York, NY.

Boards & Committees
Member, Advisory Council

Winona Capital Management provides acquisition and growth capital to lower middle-market companies. The firm seeks direct investments in consumer-driven companies characterized by innovative high-margin products or services with strong growth prospects in revenues and earnings. They have particular interest in businesses focused on niche consumer goods and services such as sports, recreation and leisure, specialty manufacturing and distribution, growth-oriented, multi-unit specialty food, retail and educational services. Winona Capital Management focuses on companies with revenues greater than $10 million and EBITDA above $1 million. The firm seeks to commit $5 million to $15 million in equity capital per opportunity, whether that commitment is made at the outset or committed over a 5 year period.


Knowledge Networks, Inc. provides online research for consumer products and services. The company was founded in 1998 by Norman H. Nie and Richard Douglas Rivers and is headquartered in Palo Alto, CA.

Independent Director
2016 - 2017

Rocket Fuel, Inc. is a predictive marketing software company. It uses artificial intelligence to provide managed services, as well as SaaS-based data management platform (DMP) and demand side platform (DSP). The company's integrated DMP and DSP platforms are designed to deliver and optimize media spend to engage, up-sell and retarget consumers across addressable channels, such as display, mobile, video, social, and television. Rocket Fuel was founded by Richard A. Frankel, Abhinav Gupta and George H. John on March 25, 2008 and is headquartered in Redwood City, CA.

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Nielsen NV purchases Nielsen Consumer Insights, Inc.

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