X0306 4/A 2022-07-01 2022-07-07 0 0001838672 AdTheorent Holding Company, Inc. ADTH 0001921847 Anderson Andrew L C/O ADTHEORENT HOLDING COMPANY, INC. 330 HUDSON STREET, 13TH FLOOR NEW YORK NY 10013 0 1 0 0 Chief Technology Officer Common Stock 2022-07-01 4 F 0 14269 3.02 D 161470 D This amendment is being filed to correct an inadvertent omission of 58,540 shares underlying Restricted Stock Units from the calculation of the Reporting Person's amount of securities beneficially owned following the reported transactions in Column 5 of Table I. /s/ Thomas P. Conaghan, Attorney-in-Fact 2023-01-04