Sec Form 4/A Filing - KOENIG THEODORE L @ AdTheorent Holding Company, Inc. - 2021-12-15

FORM 4/A 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 KOENIG THEODORE L 2. Issuer Name and Ticker or Trading Symbol AdTheorent Holding Company, Inc. [ MACQ] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Executive Officer (Last) (First) (Middle) C/O MONROE CAPITAL CORPORATION, 311 SOUTH WACKER DRIVE, SUITE 6400 3. Date of Earliest Transaction (MM/DD/YY) 12/15/2021 (Street) CHICAGO, IL60606 4. If Amendment, Date Original Filed (MM/DD/YY) 12/15/2021 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ 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 12/15/2021 P 550,000( 3 ) A $ 9.9739( 2 ) 1,350,000( 3 ) I See Footnote( 1 )

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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other KOENIG THEODORE L C/O MONROE CAPITAL CORPORATION 311 SOUTH WACKER DRIVE, SUITE 6400 CHICAGO, IL60606 X X Chief Executive Officer Signatures Theodore L. Koenig, by Nelson Mullins Riley & Scarborough with Power of Attorney 01/11/2022 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The securities disclosed in this Form 4 are owned by certain funds (the "Funds") managed by Monroe Capital LLC and/or its affiliates ("Monroe"). Theodore L. Koenig is the Chief Executive Officer of Monroe. By reason of the provisions of Rules 13d-3 and 16a-1 under the Securities Exchange Act of 1934, as amended, Mr. Koenig may be deemed to be the beneficial owner of the securities beneficially owned by the Funds. The filing of this statement shall not be deemed an admission that Mr. Koenig is the beneficial owner of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise. Mr. Koenig hereby disclaims beneficial ownership of all such securities, except to the extent of any indirect pecuniary interest therein. ( 2 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.965 to approximately $9.99, inclusive. 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 sold at each separate price within the ranges set forth in this footnote 2 to this Form 4. ( 3 )The original Form 4 was filed on December 15, 2021. This amendment is being filed to correct an administrative error in reporting the amount of securities acquired and the amount of securities beneficially owned following the reported transaction in Columns 4 and 5, respectively, in Table I, which underreported the the amount of securities acquired by 300,000 shares. This filing properly reflects the correct number of shares as of December 15, 2021. As of January 11, 2022, the reporting person beneficially owned 2,004,441 shares.

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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