<ACCESSION-NUMBER>0001604665-19-000025 <TYPE>10-Q <PUBLIC-DOCUMENT-COUNT>63 <PERIOD>20190630 <FILING-DATE>20190806 <DATE-OF-FILING-DATE-CHANGE>20190806 <FILER> <COMPANY-DATA> <CONFORMED-NAME>Westlake Chemical Partners LP <CIK>0001604665 <ASSIGNED-SIC>2860 <IRS-NUMBER>320436529 <STATE-OF-INCORPORATION>DE <FISCAL-YEAR-END>1231 </COMPANY-DATA> <FILING-VALUES> <FORM-TYPE>10-Q <ACT>34 <FILE-NUMBER>001-36567 <FILM-NUMBER>191001711 </FILING-VALUES> <BUSINESS-ADDRESS> <STREET1>2801 POST OAK BOULEVARD <STREET2>SUITE 600 <CITY>HOUSTON <STATE>TX <ZIP>77056 <PHONE>(713) 960-9111 </BUSINESS-ADDRESS> <MAIL-ADDRESS> <STREET1>2801 POST OAK BOULEVARD <STREET2>SUITE 600 <CITY>HOUSTON <STATE>TX <ZIP>77056 </MAIL-ADDRESS> </FILER>