13F-HR LIVE false true false 0001473116 XXXXXXXX 06-30-2016 06-30-2016 Yorktown Energy Partners VIII, L.P.

410 Park Avenue 19th Floor New York NY 10022

13F HOLDINGS REPORT 028-17371 Y Yorktown VIII Company LP is the sole general partner of Yorktown Energy Partners VIII, L.P. Yorktown VIII Associates LLC is the sole general partner of Yorktown VIII Company LP. As a result, Yorktown VIII Associates LLC and Yorktown VIII 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 VIII, L.P. Bryan H. Lawrence 212-515-2112 /s/ Bryan H. Lawrence New York NY 08-15-2016 2 2 284473 false 1 028-17372 Yorktown VIII Co LP 2 028-17367 Yorktown VIII Associates LLC