 WASHINGTON--BUSINESS WIRE--Stagwell Media LP Stagwell or the Company, which on December 21, 2020 entered into a definitive transaction agreement to combine its businesses the Proposed Transaction with MDC Partners, Inc. MDC Nasdaq: MDCA, announced today that it will host a live webcast to discuss its fourth quarter and full year 2020 results on Tuesday, March 9, 2020 at 8:30 am ET. Stagwell President and Managing Partner and MDC Chairman and CEO, Mark Penn, Stagwell Partner, J 