Interactive joins Nielsen. Nielsen and its wholly owned subsidiary, Prime Acquisition Corp., completed tender offer to buy all outstanding shares of common stock of Harris Interactive, Inc. (NASDAQ:HPOL). Harris Interactive became a wholly owned subsidiary of Nielsen and its shares ceased to be traded on the NASDAQ Stock Market. June 2014 – ITWP Acquires Harris Interactive UK, Harris Interactive SAS in France, and Harris Interactive AG in Germany from Nielsen. January 2017 – The Stagwell Group acquires Harris. Company leadership Since its acquisition by The Stagwell Group in 2017, The Harris Poll has been led by Chairman Mark Penn and Co-Chief Executive Officers John Gerzema and Will Johnson. Mark Penn, whose career spans 40 years in market research, advertising, public relations, polling and consulting, is president and managing partner of The Stagwell Group, a private equity firm with investments in digital marketing services. Before founding the Stagwell Group in 2015, Penn was chief strategy officer and executive vice president at Microsoft Corp. For six years, he was White House pollster to President Bill Clinton and was a key adviser in his 1996 re-election. Penn later was chief strategist to Hillary Clinton her U.S. Senate and 2008 presidential campaigns. After graduating from Harvard College in 1976, Penn and his future business partner Doug Schoen started Penn & Schoen – now PSB Insights - and helped elect more than 25 government leaders in Asia, South America and Europe, including Tony Blair and Menachem Begin. Penn was also CEO of Burson Cohn & Wolfe, a public relation company owned by WPP Group, from 2006 to 2012. He is the author of “Microtrends Squared: The New Small Forces Driving Today’s Big Disruptions,” which was published in 2018 and an update to his 2007 book “Microtrends.” Penn has been a columnist for The Wall Street Journal, Time, Politico, The Hill and the Huffington Post. He is a visiting lecturer at Harvard College. John Gerzema, who began a career in advertising and marketing in 1987, became co-CEO of The Harris Poll in 2017, after almost seven years as chairman and CEO of BAV Consulting, a unit of advertising agency Young & Rubicam, today known as VMLY&R. Previously, he was Chief Insights Officer for Young & Rubicam, which is part of WPP Group. Gerzema is the author of three best-selling books, “The Brand Bubble,” “Spend Shift,” and “The Athena Doctrine,” a 2013 exploration of the rise of