Enterprise Products Partners L.P. provides midstream energy services to producers and consumers of natural gas, natural gas liquids (NGLs), crude oil, petrochemicals, and refined products. It operates in four segments: NGL Pipelines & Services, Crude Oil Pipelines & Services, Natural Gas Pipelines & Services, and Petrochemical & Refined Products Services. The NGL Pipelines & Services segment offers natural gas processing and related NGL marketing services. It operates natural gas processing facilities located in Colorado, Louisiana, Mississippi, New Mexico, Texas, and Wyoming; NGL pipelines; NGL fractionation facilities; NGL and related product storage facilities; and NGL marine terminals. The Crude Oil Pipelines & Services segment operates crude oil pipelines; and crude oil storage and marine terminals, which include a fleet of approximately 250 tractor-trailer tank trucks that are used to transport crude oil. It also engages in crude oil marketing activities. The Natural Gas Pipelines & Services segment operates natural gas pipeline systems to gather, treat, and transport natural gas. It leases underground salt dome natural gas storage facilities in Napoleonville, Louisiana; owns an underground salt dome storage cavern in Wharton County, Texas; and markets natural gas. The Petrochemical & Refined Products Services segment operates propylene fractionation facilities, including propylene fractionation units and propane dehydrogenation facilities, and related marketing activities; butane isomerization complex and related deisobutanizer operations; and octane enhancement, isobutane dehydrogenation, and high purity isobutylene production facilities. It also operates refined products pipelines and terminals; and ethylene export terminals; and provides refined products marketing and marine transportation services. Enterprise Products Partners L.P. was founded in 1968 and is headquartered in Houston, Texas.

Energy Transfer LP provides energy-related services. The company owns and operates natural gas transportation pipeline, and natural gas storage facilities in Texas and Oklahoma; and approximately 20,090 miles of interstate natural gas pipeline. It also sells natural gas to electric utilities, independent power plants, local distribution and other marketing companies, and industrial end-users. In addition, the company owns and operates natural gas gathering pipelines, processing plant, and treating and conditioning facilities in Texas, New Mexico, West Virginia, Pennsylvania, Ohio, Oklahoma, Arkansas, Kansas, Montana, North Dakota, Wyoming, and Louisiana; natural gas gathering, oil pipeline, and oil stabilization facilities in South Texas; and transports and supplies water to natural gas producer in Pennsylvania. Further, it owns 5,700 miles of natural gas liquid (NGL) pipeline; NGL fractionation facilities; NGL storage facilities; and other NGL storage assets and terminal. Additionally, the company provides crude oil transportation, terminalling, acquisition, and marketing activities; owns and operates approximately 14,500 miles of crude oil trunk and gathering pipelines in the Southwest, Midcontinent, and Midwest United States; and sells and distributes gasoline, middle distillate, and motor fuels and other petroleum products. It also offers natural gas compression services; carbon dioxide and hydrogen sulfide removal services; and manages coal and natural resources properties, as well as sells standing timber, leases coal-related infrastructure facilities, collects oil and gas royalty, and generate electrical power. The company was formerly known as Energy Transfer Equity, L.P. and changed its name to Energy Transfer LP in October 2018. Energy Transfer LP was founded in 1996 and is headquartered in Dallas, Texas.

Cheniere Energy, Inc., an energy infrastructure company, primarily engages in the liquefied natural gas (LNG) related businesses in the United States. It owns and operates the Sabine Pass LNG terminal in Cameron Parish, Louisiana; and the Corpus Christi LNG terminal near Corpus Christi, Texas. The company also owns Creole Trail pipeline, a 94-mile natural gas supply pipeline that interconnects the Sabine Pass LNG Terminal with several interstate and intrastate pipelines; and operates Corpus Christi pipeline, a 21.5-mile natural gas supply pipeline that interconnects the Corpus Christi LNG terminal with various interstate and intrastate natural gas pipelines. It is also involved in the LNG and natural gas marketing business. The company was incorporated in 1983 and is headquartered in Houston, Texas.

ONEOK, Inc. engages in gathering, processing, fractionation, storage, transportation, and marketing of natural gas and natural gas liquids (NGL) in the United States. It operates through four segments: Natural Gas Gathering and Processing, Natural Gas Liquids, Natural Gas Pipelines, and Refined Products and Crude. The company owns natural gas gathering pipelines and processing plants in the Mid-Continent and Rocky Mountain regions; and provides midstream services to producers of NGLs. It also owns NGL gathering and distribution pipelines in Oklahoma, Kansas, Texas, New Mexico, Montana, North Dakota, Wyoming, and Colorado; terminal and storage facilities in Kansas, Nebraska, Iowa, and Illinois; NGL distribution pipelines in Kansas, Nebraska, Iowa, Illinois, and Indiana; transports refined petroleum products, including unleaded gasoline and diesel; and owns and operates truck- and rail-loading, and -unloading facilities connected to NGL fractionation, storage, and pipeline assets. In addition, the company transports and stores natural gas through regulated interstate and intrastate natural gas transmission pipelines, and natural gas storage facilities. Further, it owns and operates a parking garage in downtown Tulsa, Oklahoma; and leases excess office space and rail cars. Additionally, the company transports, stores, and distributes refined products, NGLs, and crude oil, as well as conducts commodity-related activities, including liquids blending and marketing activities. It serves integrated and independent exploration and production companies; other NGL and natural gas gathering and processing companies; crude oil and natural gas production companies; utilities; industrial companies; natural gasoline distributors; propane distributors; municipalities; ethanol producers; petrochemical, refining, and marketing companies; and heating fuel users, refineries, and exporters. ONEOK, Inc. was founded in 1906 and is headquartered in Tulsa, Oklahoma.

Targa Resources Corp., together with its subsidiary, Targa Resources Partners LP, owns, operates, acquires, and develops a portfolio of complementary domestic midstream infrastructure assets in North America. It operates in two segments, Gathering and Processing, and Logistics and Transportation. The company is involved in gathering, compressing, treating, processing, transporting, and selling natural gas; storing, fractionating, treating, transporting, and selling natural gas liquids (NGL) and NGL products, including services to liquefied petroleum gas exporters; and gathering, storing, terminaling, purchasing, and selling crude oil. It is also involved in the purchase and resale of NGL products; and sale of propane, as well as provision of related logistics services to multi-state retailers, independent retailers, and other end-users. In addition, the company offers NGL balancing services; and transportation services to refineries and petrochemical companies in the Gulf Coast area, as well as purchases, markets, and resells natural gas. As of December 31, 2023, it leased and managed approximately 605 railcars; 137 tractors; and 6 vacuum trucks and 2 pressurized NGL barges. Targa Resources Corp. was incorporated in 2005 and is headquartered in Houston, Texas.

Hess Midstream LP owns, develops, operates, and acquires midstream assets and provide fee-based services to Hess and third-party customers in the United States. It operates through three segments: Gathering; Processing and Storage; and Terminaling and Export. The Gathering segment owns natural gas gathering and compression systems; crude oil gathering systems; and produced water gathering and disposal facilities. Its gathering systems consists of approximately 1,410 miles of high and low pressure natural gas and natural gas liquids gathering pipelines with capacity of approximately 660 million cubic feet per day; crude oil gathering system comprises approximately 570 miles of crude oil gathering pipelines; and produced water gathering system that includes approximately 300 miles of pipelines in gathering systems. The Processing and Storage segment comprises Tioga Gas Plant, a natural gas processing and fractionation plant located in Tioga, North Dakota; a 50% interest in the Little Missouri 4 gas processing plant located in south of the Missouri River in McKenzie County, North Dakota; and Mentor Storage Terminal, a propane storage cavern and rail, and truck loading and unloading facility located in Mentor, Minnesota. The Terminaling and Export segment owns Ramberg terminal facility; Tioga rail terminal; crude oil rail cars; and other Dakota access pipeline connections, as well as Johnson's Corner Header System, a crude oil pipeline header system. Hess Midstream LP was founded in 2014 and is based in Houston, Texas.

Plains GP Holdings, L.P., through its subsidiary, Plains All American Pipeline, L.P., owns and operates midstream infrastructure systems in the United States and Canada. It operates in two segments, Crude Oil and Natural Gas Liquids (NGLs). The company engages in the gathering and transporting crude oil and NGLs using pipelines, gathering systems, and trucks. It engages in the loading and unloading services at terminals; NGL fractionation and isomerization services; and natural gas and condensate processing services. The company offers logistics services to producers, refiners, and other customers. PAA GP Holdings LLC operates as a general partner of the company. Plains GP Holdings, L.P. was incorporated in 2013 and is headquartered in Houston, Texas.

Genesis Energy, L.P. provides integrated suite of midstream services in crude oil and natural gas industry in the United States. It operates through Offshore Pipeline Transportation, Soda and Sulfur Services, Marine Transportation, and Onshore Facilities and Transportation segments. The Offshore Pipeline Transportation segment engages in offshore crude oil and natural gas pipeline transportation and handling operations, as well as deep water pipeline servicing. This segment also owns interests in offshore crude oil and natural gas pipeline systems, platforms, and related infrastructure. The Soda and Sulfur Services segment produces, markets, and sells soda ash; and provides sulfur removal services. This segment also owns and operates soda ash production facilities, underground trona ore mines and brine solution mining operations and related equipment, and logistics and other assets; and sells sodium hydrosulfide and caustic soda to industrial and commercial companies involved in the mining of base metals. The Marine Transportation segment offers waterborne transportation of petroleum and crude oil in North America. This segment owns a fleet of 91 barges and 42 push/tow boats. The Onshore Facilities and Transportation segment offers onshore facilities and transportation services to crude oil refineries and producers by purchasing, transporting, storing, blending, and marketing crude oil and refined products; and operates trucks, trailers, railcars, and terminals and tankage in various locations along the Gulf Coast. This segment also transports crude oil, as well as owns four onshore crude oil pipeline systems and four operational crude oil rail unloading facilities. The company was incorporated in 1996 and is headquartered in Houston, Texas.