 NEW YORK--BUSINESS WIRE-- CCXX--Rosen Law Firm, a global investor rights law firm, announces it has filed a class action lawsuit on behalf of purchasers of the securities of MultiPlan Corporation fka Churchill Capital Corp. III NYSE: MPLN, MPLN.WS, CCXX, CCXX.WS, CCXX.U: i between July 12, 2020 and November 10, 2020, inclusive the Class Period; and ii all holders of Churchill III Class A common stock entitled to vote on Churchill IIIs merger with and acquisition of Polaris Parent Corp. 