<ACCESSION-NUMBER>0000788965-19-000040 <TYPE>8-K <PUBLIC-DOCUMENT-COUNT>4 <PERIOD>20190805 <ITEMS>2.02 <ITEMS>9.01 <FILING-DATE>20190808 <DATE-OF-FILING-DATE-CHANGE>20190807 <FILER> <COMPANY-DATA> <CONFORMED-NAME>HALLADOR ENERGY CO <CIK>0000788965 <ASSIGNED-SIC>1220 <IRS-NUMBER>841014610 <STATE-OF-INCORPORATION>CO <FISCAL-YEAR-END>1231 </COMPANY-DATA> <FILING-VALUES> <FORM-TYPE>8-K <ACT>34 <FILE-NUMBER>001-34743 <FILM-NUMBER>191006882 </FILING-VALUES> <BUSINESS-ADDRESS> <STREET1>1183 EAST CANVASBACK DRIVE <CITY>TERRE HAUTE <STATE>IN <ZIP>47802 <PHONE>303-839-5504 </BUSINESS-ADDRESS> <MAIL-ADDRESS> <STREET1>1183 EAST CANVASBACK DRIVE <CITY>TERRE HAUTE <STATE>IN <ZIP>47802 </MAIL-ADDRESS> <FORMER-COMPANY> <FORMER-CONFORMED-NAME>HALLADOR PETROLEUM CO <DATE-CHANGED>19920703 </FORMER-COMPANY> <FORMER-COMPANY> <FORMER-CONFORMED-NAME>KIMBARK OIL & GAS CO /CO/ <DATE-CHANGED>19900102 </FORMER-COMPANY> <FORMER-COMPANY> <FORMER-CONFORMED-NAME>KIMBARK INC <DATE-CHANGED>19860624 </FORMER-COMPANY> </FILER>