Why Hillary's Former Operative Bought a Hollywood Box-Office Tracking Firm – The Hollywood Reporter
Agency Transformation: An Interview with Mark Penn, Chairman and CEO, MDC Partners | Customer First Thinking
Going Big On Media With Stagwell CEO Mark Penn | AdExchanger
Mark Penn Tried to Sell Stagwell Group to Rival Ad Holding Companies
Microtrends Squared] | C-SPAN.org
Mark Penn - Wikipedia
Mark Penn - Chairman and CEO - Stagwell | LinkedIn
Mark Penn Behind Push to Block Nancy Pelosi's Bid to Be House Speaker
Mark Penn (@Mark_Penn) / Twitter
Stagwell | Meet Mark - Stagwell
Mark Penn exits Microsoft to found investment firm | PR Week
Mark J. Penn | C-SPAN.org
Mark J. Penn | Meridian International Center
Stagwell Group CEO Mark Penn on why it was time to buy a GOP firm | PR Week
Mark Penn | Twelve
Mark Penn's Stagwell Group Will Acquire SKDKnickerbocker - The New York Times
A Glimpse Into the Mind of Microsoft's Controversial New Strategy Chief - Bloomberg
Mark Penn (@Mark_Penn) / Twitter
Trump met with ex-Bill Clinton pollster Mark Penn to discuss impeachment | CNN Politics
Mark Penn on building Stagwell, his political and polling background | Ad Age
Mark Penn | Milken Institute
Mark Penn, Ex-Clinton Loyalist, Visits Trump, and Democrats Are Not Pleased - The New York Times
Mark Penn's Investment Group Acquires SKDKnickerbocker
Washington VIPs gather to celebrate Mark Penn's new book | The Hill
