Sec Form 4 Filing - Klein Michael Stuart @ MultiPlan Corp - 2020-10-06

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Klein Michael Stuart 2. Issuer Name and Ticker or Trading Symbol MultiPlan Corp [ CCXX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 640 FIFTH AVENUE, 12TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 10/06/2020 (Street) NEW YORK, NY10019 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class A common stock 10/06/2020 P 220,000 ( 2 ) A $ 10.31 ( 2 ) 220,000 I See notes ( 1 ) ( 6 ) Class A common stock 10/07/2020 P 261,711 ( 3 ) A $ 10.2967 ( 3 ) 481,711 I See notes ( 1 ) ( 6 ) Class A common stock 10/08/2020 M 27,500,000 A 27,981,711 I See notes ( 1 ) ( 6 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Class B common stock ( 4 ) 10/08/2020 M 27,500,000 ( 4 ) ( 4 ) Class A common stock 27,500,000 ( 4 ) 27,500,000 I See notes ( 1 ) ( 6 ) Warrants $ 11.5 10/08/2020 A 1,500,000 11/07/2020 10/08/2025 Class A common stock 1,500,000 ( 5 ) ( 5 ) 24,500,000 I See notes ( 1 ) ( 6 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Klein Michael Stuart 640 FIFTH AVENUE 12TH FLOOR NEW YORK, NY10019 X X M. Klein Associates, Inc. 640 FIFTH AVENUE 12TH FLOOR NEW YORK, NY10019 X Churchill Sponsor III LLC 640 FIFTH AVENUE 12TH FLOOR NEW YORK, NY10019 X Signatures See Exhibit 99.1 for signatures 10/08/2020 Signature of Reporting Person Date

Explanation of Responses:

( 1 )This Form 4 is filed by the following Reporting Persons: Michael Stuart Klein, M. Klein Associates, Inc., and Churchill Sponsor III LLC ("Sponsor"). Because of the relationships among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. ( 2 )Represents shares of Class A common stock purchased by M. Klein & Company, LLC in multiple transactions at prices ranging from $10.098 to $10.48. The price reported is a weighted average price. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (2). ( 3 )Represents shares of Class A common stock purchased by M. Klein & Company, LLC in multiple transactions at prices ranging from $10.20 to $10.42. The price reported is a weighted average price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the ranges set forth in this footnote (3). ( 4 )Upon the consummation of the Issuer's business combination with Polaris Investment Holdings, L.P. on October 8, 2020 (the "Business Combination"), each issued and outstanding share of Class B common stock of the Issuer automatically converted into one share of Class A common stock of the Issuer pursuant to the Issuer's certificate of incorporation in effect prior to the Business Combination. ( 5 )In connection the consummation of the Business Combination, the Issuer issued 1,500,000 warrants to purchase one share of Class A common stock of the Issuer, subject to adjustment pursuant to the terms of the warrants, to Sponsor in satisfaction of the $1,500,000 working capital loan from the Sponsor to the Issuer. The warrants become exercisable on November 7, 2020 and expire at 5:00 p.m., New York City time, on October 8, 2025, or earlier upon their redemption or the liquidation of the Issuer pursuant to the terms of the warrants. ( 6 )Mr. Klein has a minority interest in M. Klein & Company, LLC, and is the sole stockholder of M. Klein Associates, Inc., which is the managing member of Sponsor. Following the consummation of the Business Combination, the Reporting Persons own less than 10% of the outstanding Class A common stock of the Issuer. The filing of this statement shall not be deemed to be an admission that, for purposes of Section 16 under the Securities Exchange Act of 1934, as amended, or otherwise, any of the Reporting Persons is the beneficial owner of any securities reported herein. The Reporting Persons disclaim beneficial ownership of any securities of the Issuer except to the extent of such Reporting Person's pecuniary interest therein.

Remarks: Exhibit 99.1 (Joint filer information) is incorporated by reference here.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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