0000950123-19-002321.txt : 20190214 0000950123-19-002321.hdr.sgml : 20190214 20190214165454 ACCESSION NUMBER: 0000950123-19-002321 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20181231 FILED AS OF DATE: 20190214 DATE AS OF CHANGE: 20190214 EFFECTIVENESS DATE: 20190214 FILER: COMPANY DATA: COMPANY CONFORMED NAME: Yorktown Energy Partners VI LP CENTRAL INDEX KEY: 0001347504 IRS NUMBER: 201384906 FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-HR SEC ACT: 1934 Act SEC FILE NUMBER: 028-18549 FILM NUMBER: 19607803 BUSINESS ADDRESS: STREET 1: 410 PARK AVENUE STREET 2: 19TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10022 BUSINESS PHONE: 212-515-2112 MAIL ADDRESS: STREET 1: 410 PARK AVENUE STREET 2: 19TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10022 13F-HR 1 primary_doc.xml 13F-HR LIVE false true false 0001347504 XXXXXXXX 12-31-2018 12-31-2018 Yorktown Energy Partners VI LP

410 Park Avenue 19th Floor New York NY 10022

13F HOLDINGS REPORT 028-18549 Y Yorktown VI Company LP is the sole general partner of Yorktown Energy Partners VI, L.P. Yorktown VI Associates LLC is the sole general partner of Yorktown VI Company LP. As a result, Yorktown VI Associates LLC and Yorktown VI Company LP may be deemed to have the power to vote or direct the vote or to dispose or direct the disposition of the shares owned by Yorktown Energy Partners VI, L.P. Bryan H. Lawrence 212-515-2111 /s/ Bryan H. Lawrence New York NY 02-14-2019 2 5 29304 false 1 028-18647 Yorktown VI Co LP 2 028-18544 Yorktown VI Associates LLC INFORMATION TABLE 2 form13fInfoTable.xml INFORMATION TABLE FOR FORM 13F Hallador Energy Company COM 40609P105 3067 604904 SH DFND 1,2 604904 0 0 Star Group L P UNIT LTD PARTNR 85512C105 3995 427734 SH DFND 1,2 427734 0 0 Mid Con Energy Partners LP COM 59560V109 117 140436 SH DFND 1,2 140436 0 0 Antero Midstream GP LP COM SHS REPSTG 03675Y103 22034 1970846 SH DFND 1,2 1970846 0 0 Approach Resources Inc COM 03834A103 91 98056 SH DFND 1,2 98056 0 0