0000950123-17-010752.txt : 20171114 0000950123-17-010752.hdr.sgml : 20171114 20171114130530 ACCESSION NUMBER: 0000950123-17-010752 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20170930 FILED AS OF DATE: 20171114 DATE AS OF CHANGE: 20171114 EFFECTIVENESS DATE: 20171114 FILER: COMPANY DATA: COMPANY CONFORMED NAME: Yorktown Energy Partners X, L.P. CENTRAL INDEX KEY: 0001577919 IRS NUMBER: 462445852 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-HR SEC ACT: 1934 Act SEC FILE NUMBER: 028-17861 FILM NUMBER: 171200038 BUSINESS ADDRESS: STREET 1: 410 PARK AVENUE STREET 2: 19TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10022 BUSINESS PHONE: 212-515-2115 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 0001577919 XXXXXXXX 09-30-2017 09-30-2017 Yorktown Energy Partners X, L.P.

410 Park Avenue 19th Floor New York NY 10022

13F HOLDINGS REPORT 028-17861 Y Yorktown X Company LP is the sole general partner of Yorktown Energy Partners X, L.P. Yorktown X Associates LLC is the sole general partner of Yorktown X Company LP. As a result, Yorktown X Associates LLC and Yorktown X 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 X, L.P. Bryan H. Lawrence 212-515-2112 /s/ Bryan H. Lawrence New York NY 11-14-2017 2 3 556492 false 1 028-17862 Yorktown X Co LP 2 028-17863 Yorktown X Associates LLC INFORMATION TABLE 2 form13fInfoTable.xml INFORMATION TABLE FOR FORM 13F Extraction Oil and Gas Inc COM 30227M105 270160 17554262 SH DFND 1,2 17554262 0 0 Ramaco Res Inc COM 75134P303 24484 3692881 SH DFND 1,2 3692881 0 0 Solaris Oilfield Infrstr Inc COM CL A 83418M103 261848 15022823 SH DFND 1,2 15022823 0 0