Q&A: CEO Mark Penn Reveals His Plans for MDC Partners’ Culture, Clients and Billion-Dollar Debt

'It takes a while to implement these things'

Mark Penn's Stagwell Group is now MDC's largest shareholder. Matthew Staver/Bloomberg

This week, MDC Partners finally ended its long-running search for a new leader when Mark Penn’s Stagwell Group confirmed that it would spend $100 million to buy just under 30 percent of the holding group.

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@PatrickCoffee patrick.coffee@adweek.com Patrick Coffee is a senior editor for Adweek.