||Halliburton Company provides various products and services to the energy industry for the exploration, development, and production of oil and gas properties worldwide.
|Continental Resources, Inc.
||Continental Resources, Inc. is an independent crude oil and natural gas exploration and production company with operations in the North, South and East regions of the United States.
|EOG Resources, Inc.
||EOG Resources, Inc., explores, develops, produces and markets natural gas and crude oil primarily in producing basins in the United States, Canada, The Republic of Trinidad and Tobago, the United Kingdom, and The People's Republic of China.
||Schlumberger Limited operates as an oilfield services company in the United States and internationally.
|Pioneer Natural Resources Co.
||Pioneer Natural Resources Company (Pioneer) is an independent oil and gas exploration and production company with operations in the United States and South Africa.
|Parsley Energy, Inc., Class A
||Parsley Energy is an independent oil and natural gas company with operations in the Permian Basin that develops unconventional oil and natural gas reserves.
||RPC, Inc. provides a range of oilfield services and equipment for oil and gas companies involved in the exploration, production, and development of oil and gas properties in the U.S., Africa, Canada, Argentina, China, Mexico, Eastern Europe, Latin America, the Middle East and New Zealand.
|RSP Permian, Inc.
|Devon Energy Corp.
|Concho Resources, Inc.
||Concho Resources Inc., an independent oil and natural gas company, acquires, develops, and explores for oil and natural gas properties in the U.S.
Total Portfolio Holdings
updated quarterly, upon availability
| (as of 9/30/2017)