MDC Partners Resolves Dispute With Activist Investor as Mark Penn Becomes Chairman
Former Snap executive Kristen O’Hara nominated to board

Mark Penn became CEO of MDC Partners in March.
MDC Partners/Adweek

Just over a month after former WPP executive Mark Penn became CEO of MDC Partners and acquired approximately 30% of the company via his own Stagwell Group, the agency network announced several changes to its board of directors.