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Table of Contents ( MARK ONE ) X ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 0 For the fiscal year ended December 31 , 2020 TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K Delaware ( State or other jurisdiction of incorporation or organization ) For the transition period from Commission file number : 001-39228 Non - accelerated filer MULTIPLAN CORPORATION ( Exact Name of Registrant as Specified in Its Charter ) Securities registered pursuant to Section 12 ( b ) of the Act : O 640 Fifth Avenue , 12th Floor New York , NY 10019 ( Address of principal executive offices ) Title of each class Shares of Class A common stock , $ 0.001 par value per share Warrants X ( 212 ) 380-7500 ( Issuer's telephone number ) to Trading Symbol MPLN MPLN.WS 84-3536151 Indicate by check mark if the registrant is a well - seasoned issuer , as defined in Rule 405 of the Securities Act . Yes o No x Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes o No x Check whether the issuer ( 1 ) filed all reports required to be filed by Section 13 or 15 ( d ) of the Exchange Act during the past 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the days . Yes x No o past 90 ( I.R.S. Employer Identification No. ) Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( §232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . Yes x No o Name of each exchange on which registered New York Stock Exchange New York Stock Exchange Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , a smaller reporting company or an emerging growth company . See definitions of " large accelerated filer " , " accelerated filer ” , “ smaller reporting company " , and " emerging growth company " in Rule 12b - 2 of the Exchange Act . Large accelerated filer Accelerated filer Smaller reporting company Emerging growth company If an emerging growth company , indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13 ( a ) of the Exchange Act . o ( ( (