<ACCESSION-NUMBER>0001144204-18-023426 <TYPE>DEFA14A <PUBLIC-DOCUMENT-COUNT>5 <FILING-DATE>20180430 <DATE-OF-FILING-DATE-CHANGE>20180430 <EFFECTIVENESS-DATE>20180430 <FILER> <COMPANY-DATA> <CONFORMED-NAME>Checkpoint Therapeutics, Inc. <CIK>0001651407 <ASSIGNED-SIC>2834 <IRS-NUMBER>472568632 <STATE-OF-INCORPORATION>DE <FISCAL-YEAR-END>1231 </COMPANY-DATA> <FILING-VALUES> <FORM-TYPE>DEFA14A <ACT>34 <FILE-NUMBER>001-38128 <FILM-NUMBER>18786649 </FILING-VALUES> <BUSINESS-ADDRESS> <STREET1>2 GANSEVOORT STREET <STREET2>9TH FLOOR <CITY>NEW YORK <STATE>NY <ZIP>10014 <PHONE>212-554-4366 </BUSINESS-ADDRESS> <MAIL-ADDRESS> <STREET1>2 GANSEVOORT STREET <STREET2>9TH FLOOR <CITY>NEW YORK <STATE>NY <ZIP>10014 </MAIL-ADDRESS> </FILER>