Chevron Corporation, through its subsidiaries, engages in the integrated energy and chemicals operations in the United States and internationally. The company operates in two segments, Upstream and Downstream. The Upstream segment is involved in the exploration, development, production, and transportation of crude oil and natural gas; processing, liquefaction, transportation, and regasification of liquefied natural gas; transportation of crude oil through pipelines; transportation, storage, and marketing of natural gas; and carbon capture and storage, as well as a gas-to-liquids plant. The Downstream segment refines crude oil into petroleum products; markets crude oil, refined products, and lubricants; manufactures and markets renewable fuels, commodity petrochemicals, plastics for industrial uses, and fuel and lubricant additives; and transports crude oil and refined products by pipeline, marine vessel, motor equipment, and rail car. The company was formerly known as ChevronTexaco Corporation and changed its name to Chevron Corporation in 2005. Chevron Corporation was founded in 1879 and is headquartered in San Ramon, California.

PG&E Corporation, through its subsidiary, Pacific Gas and Electric Company, engages in the sale and delivery of electricity and natural gas to customers in northern and central California, the United States. It generates electricity using nuclear, hydroelectric, fossil fuel-fired, fuel cell, and photovoltaic sources. The company owns and operates interconnected transmission lines; electric transmission substations, distribution lines, transmission switching substations, and distribution substations; and natural gas transmission, storage, and distribution system consisting of distribution pipelines, backbone and local transmission pipelines, and various storage facilities. It serves residential, commercial, industrial, and agricultural customers, as well as natural gas-fired electric generation facilities. PG&E Corporation was incorporated in 1905 and is based in Oakland, California.

Coterra Energy Inc., an independent oil and gas company, engages in the development, exploration, and production of oil, natural gas, and natural gas liquids in the United States. The company's properties include the Marcellus Shale with approximately 186,000 net acres in the dry gas window of the play located in Susquehanna County, Pennsylvania; Permian Basin properties with approximately 296,000 net acres located in west Texas and southeast New Mexico; and Anadarko Basin properties with approximately 182,000 net acres located in Oklahoma. It also operates natural gas and saltwater gathering and disposal systems in Texas. The company sells its natural gas to industrial customers, local distribution companies, oil and gas marketers, major energy companies, pipeline companies, and power generation facilities. Coterra Energy Inc. was incorporated in 1989 and is headquartered in Houston, Texas.

Range Resources Corporation operates as an independent natural gas, natural gas liquids (NGLs), crude oil, and condensate company in the United States. The company engages in the exploration, development, and acquisition of natural gas and crude oil properties located in the Appalachian region. It sells natural gas to utilities, marketing and midstream companies, and industrial users; NGLs to petrochemical end users, marketers/traders, and natural gas processors; and oil and condensate to crude oil processors, transporters, and refining and marketing companies. The company was formerly known as Lomak Petroleum Inc. and changed its name to Range Resources Corporation in August 1998. Range Resources Corporation was founded in 1976 and is headquartered in Fort Worth, Texas.

APA Corporation, an independent energy company, explores for, develops, and produces natural gas, crude oil, and natural gas liquids. It has oil and gas operations in the United States, Egypt, and North Sea. The company also has exploration and appraisal activities in Suriname, as well as holds interests in projects located in Uruguay and internationally. APA Corporation was incorporated in 1954 and is headquartered in Houston, Texas.

Clean Energy Fuels Corp. provides natural gas as alternative fuels for vehicle fleets and related fueling solutions in the United States and Canada. It supplies renewable natural gas (RNG), compressed natural gas (CNG), and liquefied natural gas (LNG) for medium and heavy-duty vehicles; and offers operation and maintenance services for public and private vehicle fleet customer stations. The company also designs, builds, operates, and maintains vehicle fueling stations; and sells and services compressors and other equipment that are used in RNG production and fueling stations. In addition, it transports and sells CNG, RNG, and LNG through virtual natural gas pipelines and interconnects; sells U.S. federal, state, and local government credits, such as RNG as a vehicle fuel, including Renewable Identification Numbers and Low Carbon Fuel Standards credits; and obtains federal, state, and local credits, grants, and incentives. Further, the company focuses on developing, owning, and operating dairy and other livestock waste RNG projects. It serves heavy-duty trucking, airports, refuse, public transit, industrial, and institutional energy users, as well as government fleets. Clean Energy Fuels Corp. was incorporated in 2001 and is headquartered in Newport Beach, California.

Berry Corporation operates as an independent upstream energy company in the western United States. It operates through Exploration and Production (E&P), and Well Servicing and Abandonment segments. The E&P segment engages in the development and production of onshore, low geologic risk, and long-lived conventional oil and gas reserves primarily located in California and Utah. The Well Servicing and Abandonment segment provides wellsite services in California to oil and natural gas production companies with a focus on well servicing, well abandonment services, and water logistics. The company was founded in 1909 and is headquartered in Dallas, Texas.

Chesapeake Energy Corporation operates as an independent exploration and production company in the United States. It engages in acquisition, exploration, and development of properties to produce oil, natural gas, and natural gas liquids from underground reservoirs. The company holds interests in natural gas resource plays in the Marcellus Shale in the northern Appalachian Basin in Pennsylvania and the Haynesville/Bossier Shales in northwestern Louisiana. As of December 31, 2023, the company owns a portfolio of onshore U.S. unconventional natural gas assets, including interests in approximately 5,000 natural gas wells. Chesapeake Energy Corporation was founded in 1989 and is based in Oklahoma City, Oklahoma.