Devon Energy Corporation, an independent energy company, primarily engages in the exploration, development, and production of oil, natural gas, and natural gas liquids in the United States.

Diamondback Energy, Inc., an independent oil and natural gas company, focuses on the acquisition, development, exploration, and exploitation of unconventional and onshore oil and natural gas reserves in the Permian Basin in West Texas.

EOG Resources, Inc., together with its subsidiaries, explores for, develops, produces, and markets crude oil, and natural gas and natural gas liquids.

ConocoPhillips explores for, produces, transports, and markets crude oil, bitumen, natural gas, liquefied natural gas (LNG), and natural gas liquids worldwide.

Occidental Petroleum Corporation, together with its subsidiaries, engages in the acquisition, exploration, and development of oil and gas properties in the United States, the Middle East, Africa, and Latin America.

Range Resources Corporation operates as an independent natural gas, natural gas liquids (NGLs), and oil company in the United States. The company engages in the exploration, development, and acquisition of natural gas and oil properties.

Antero Resources Corporation, an independent oil and natural gas company, acquires, explores for, develops, and produces natural gas, natural gas liquids, and oil properties in the United States.

Permian Resources Corporation, an independent oil and natural gas company, focuses on the development of crude oil and related liquids-rich natural gas reserves in the United States.

Marathon Oil Corporation operates as an independent exploration and production company in the United States and internationally. The company engages in the exploration, production, and marketing of crude oil and condensate, natural gas liquids, and natural gas; and the production and marketing of products manufactured from natural gas, such as liquefied natural gas and methanol.