MPLX LP owns and operates midstream energy infrastructure and logistics assets primarily in the United States. It operates in two segments, Logistics and Storage, and Gathering and Processing. The company is involved in the gathering, processing, and transportation of natural gas; gathering, transportation, fractionation, exchange, storage, and marketing of natural gas liquids; gathering, storage, transportation, and distribution of crude oil and refined products, as well as other hydrocarbon-based products; and sale of residue gas and condensate. It also engages in the inland marine businesses comprising transportation of light products, heavy oils, crude oil, renewable fuels, chemicals, and feedstocks in the Mid-Continent and Gulf Coast regions, as well as owns and operates boats and barges, including third-party chartered equipment, and a marine repair facility located on the Ohio River; and distribution of fuel, as well as operates refining logistics, terminals, rail facilities, and storage caverns. In addition, the company operates terminal facilities for the receipt, storage, blending, additization, handling, and redelivery of refined petroleum products located through the pipeline, rail, marine, and over-the-road modes of transportation. MPLX GP LLC acts as the general partner of MPLX LP. The company was incorporated in 2012 and is headquartered in Findlay, Ohio. MPLX LP operates as a subsidiary of Marathon Petroleum Corporation.

MPLX LP

ONEOK, Inc., together with its subsidiaries, engages in gathering, processing, storage, and transportation of natural gas in the United States. It operates through Natural Gas Gathering and Processing, Natural Gas Liquids, and Natural Gas Pipelines segments. The company owns natural gas gathering pipelines and processing plants in the Mid-Continent and Rocky Mountain regions. It also gathers, treats, fractionates, and transports natural gas liquids (NGL), as well as stores, markets, and distributes NGL products. The company owns NGL gathering and distribution pipelines in Oklahoma, Kansas, Texas, New Mexico, Montana, North Dakota, Wyoming, and Colorado; terminal and storage facilities in Kansas, Missouri, Nebraska, Iowa, and Illinois; and NGL distribution and refined petroleum products pipelines in Kansas, Missouri, Nebraska, Iowa, Illinois, and Indiana, as well as owns and operates truck- and rail-loading, and -unloading facilities connected to NGL fractionation, storage, and pipeline assets. In addition, it operates regulated interstate and intrastate natural gas transmission pipelines and natural gas storage facilities. Further, the company owns and operates a parking garage in downtown Tulsa, Oklahoma; and leases excess office space. It operates 17,500 miles of natural gas gathering pipelines; 1,500 miles of FERC-regulated interstate natural gas pipelines; 5,100 miles of state-regulated intrastate transmission pipeline; six NGL storage facilities; and eight NGL product terminals. It serves integrated and independent exploration and production companies; NGL and natural gas gathering and processing companies; crude oil and natural gas production companies; propane distributors; municipalities; ethanol producers; and petrochemical, refining, and NGL marketing companies, as well as natural gas distribution and electric generation companies, producers, processors, and marketing companies. The company was founded in 1906 and is headquartered in Tulsa, Oklahoma.

ONEOK, Inc.

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. The company operates through 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 19 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 255 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 and related marketing activities; butane isomerization complex and related deisobutanizer operations; and octane enhancement and high purity isobutylene production facilities. It also operates refined products pipelines and terminals; and ethylene export terminals, as well as provides refined products marketing and marine transportation services. The company was founded in 1968 and is headquartered in Houston, Texas.

Enterprise Products Partners L.P.

The Williams Companies, Inc., together with its subsidiaries, operates as an energy infrastructure company primarily in the United States. It operates through Transmission & Gulf of Mexico, Northeast G&P, West, and Gas & NGL Marketing Services segments. The Transmission & Gulf of Mexico segment comprises Transco and Northwest natural gas pipelines; and natural gas gathering and processing, and crude oil production handling and transportation assets in the Gulf Coast region, as well as various petrochemical and feedstock pipelines. The Northeast G&P segment engages in the midstream gathering, processing, and fractionation activities in the Marcellus Shale region primarily in Pennsylvania and New York, and the Utica Shale region of eastern Ohio. The West segment comprises gas gathering, processing, and treating operations in the Rocky Mountain region of Colorado and Wyoming, the Barnett Shale region of north-central Texas, the Eagle Ford Shale region of South Texas, the Haynesville Shale region of northwest Louisiana, and the Mid-Continent region, which includes the Anadarko, Arkoma, and Permian basins; and operates natural gas liquid (NGL) fractionation and storage facilities in central Kansas near Conway. The Gas & NGL Marketing Services segment provides wholesale marketing, trading, storage, and transportation of natural gas for natural gas utilities, municipalities, power generators, and producers; risk and asset management; and NGL marketing services. The company owns and operates 30,000 miles of pipelines, 29 processing facilities, 7 fractionation facilities, and approximately 23 million barrels of NGL storage capacity. The Williams Companies, Inc. was founded in 1908 and is headquartered in Tulsa, Oklahoma.

The Williams Companies, Inc.

Plains All American Pipeline, L.P., through its subsidiaries, engages in the pipeline transportation, terminalling, storage, and gathering of crude oil and natural gas liquids (NGL) in the United States and Canada. The company operates in two segments, Crude Oil and NGL. The Crude Oil segment offers gathering and transporting crude oil through pipelines, gathering systems, trucks, and at times on barges or railcars. This segment provides terminalling, storage, and other facilities-related services, as well as merchant activities. As of December 31, 2021, this segment owned and leased 18,300 miles of active crude oil transportation pipelines and gathering systems, as well as an additional 110 miles of pipelines that supports crude oil storage and terminalling facilities; 74 million barrels of commercial crude oil storage capacity; 38 million barrels of active, above-ground tank capacity; four marine facilities; a condensate processing facility; seven crude oil rail terminals and 2,100 crude oil railcars; and 640 trucks and 1,275 trailers. The Natural Gas Liquids segment engages in the natural gas processing, NGL fractionation, storage, transportation, and terminalling activities. As of December 31, 2021, this segment owned and operated four natural gas processing plants; nine fractionation plants; 28 million barrels of NGL storage capacity; approximately 1,620 miles of active NGL transportation pipelines, as well as an additional 55 miles of pipeline that supports NGL storage facilities; 16 NGL rail terminals and approximately 3,900 NGL rail cars; and approximately 220 trailers. The company was founded in 1981 and is headquartered in Houston, Texas. Plains All American Pipeline, L.P. operates as a subsidiary of Plains GP Holdings, L.P.

Plains All American Pipeline, L.P.

Energy Transfer LP provides energy-related services. The company owns and operates approximately 11,600 miles of natural gas transportation pipeline, and three natural gas storage facilities in Texas and two natural gas storage facilities located in the state of Texas and Oklahoma; and 19,830 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. The company owns and operates natural gas gathering and natural gas liquid (NGL) pipeline, processing plant, and treating and conditioning facilities in Texas, New Mexico, West Virginia, Pennsylvania, Ohio, Oklahoma, Arkansas, Kansas, and Louisiana; natural gas gathering, oil pipeline, and oil stabilization facilities in South Texas; and a natural gas gathering system in Ohio, as well as transport and supplies water to natural gas producer in Pennsylvania. It owns approximately 5,215 miles of NGL pipeline; NGL and propane fractionation facilities; NGL storage facilities with working storage capacity of approximately 50 million barrels (MMBbls); and other NGL storage assets and terminal with an aggregate storage capacity of approximately 17 MMBbls. The company provides crude oil transportation, terminalling, acquisition, and marketing activities; and sells and distributes gasoline, middle distillate, and motor fuels and other petroleum product. It offers natural gas compression service; carbon dioxide and hydrogen sulfide removal, natural gas cooling, dehydration, and British thermal unit management service; 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. The company was founded in 1996 and is headquartered in Dallas, Texas.

Energy Transfer LP

Kinder Morgan, Inc. operates as an energy infrastructure company in North America. The company operates through four segments: Natural Gas Pipelines, Products Pipelines, Terminals, and CO2. The Natural Gas Pipelines segment owns and operates interstate and intrastate natural gas pipeline, and underground storage systems; natural gas gathering systems and natural gas processing and treating facilities; natural gas liquids fractionation facilities and transportation systems; and liquefied natural gas liquefaction and storage facilities. The Products Pipelines segment owns and operates refined petroleum products, and crude oil and condensate pipelines; and associated product terminals and petroleum pipeline transmix facilities. The Terminals segment owns and/or operates liquids and bulk terminals that stores and handles various commodities, including gasoline, diesel fuel, chemicals, ethanol, metals, and petroleum coke; and owns tankers. The CO2 segment produces, transports, and markets CO2 to recovery and production crude oil from mature oil fields; owns interests in/or operates oil fields and gasoline processing plants; and operates a crude oil pipeline system in West Texas, as well as owns and operates RNG and LNG facilities. It owns and operates approximately 83,000 miles of pipelines and 143 terminals. The company was formerly known as Kinder Morgan Holdco LLC and changed its name to Kinder Morgan, Inc. in February 2011. Kinder Morgan, Inc. was founded in 1936 and is headquartered in Houston, Texas.

Kinder Morgan, Inc.

Targa Resources Corp., together with its subsidiary, Targa Resources Partners LP, owns, operates, acquires, and develops a portfolio of midstream energy assets in North America. The company operates in two segments, Gathering and Processing, and Logistics and Transportation. It engages 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. The company is also involved in the purchase and resale of NGL products; and wholesale of propane, as well as provision of related logistics services to multi-state retailers, independent retailers, and other end-users. In addition, it 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. The company operates approximately 28,400 miles of natural gas pipelines, including 42 owned and operated processing plants; and owns or operates a total of 34 storage wells with a gross storage capacity of approximately 76 million barrels. As of December 31, 2021, it leased and managed approximately 648 railcars; 119 transport tractors; and two company-owned pressurized NGL barges. The company was incorporated in 2005 and is headquartered in Houston, Texas.

Targa Resources Corp.

Western Midstream Partners, LP, a midstream energy company, together with its subsidiaries, acquires, owns, develops, and operates primarily in the United States. It is involved in gathering, compressing, treating, processing, and transporting natural gas; gathering, stabilizing, and transporting condensate, natural gas liquids (NGLs), and crude oil; and gathering and disposing produced water. It also buys and sells natural gas, NGLs, and condensate. The company operates assets located in Texas, New Mexico, the Rocky Mountains, and North-central Pennsylvania. Western Midstream Holdings, LLC operates as the general partner of the company. The company was formerly known as Western Gas Equity Partners, LP and changed its name to Western Midstream Partners, LP in February 2019. Western Midstream Partners, LP was incorporated in 2007 and is based in The Woodlands, Texas.

Western Midstream Partners, LP

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Ticker	Market Cap	Gross Profit Margin	Forward P/E
MPLX	$57,176.66M	56.1%	12.2
OKE	$48,224.35M	32.0%	11.0
EPD	$70,611.35M	13.4%	11.5
WMB	$77,132.18M	61.2%	26.5
PAA	$12,561.38M	6.9%	8.9
ET	$57,833.23M	20.1%	11.6
KMI	$61,690.56M	49.1%	19.9
TRGP	$38,816.68M	35.7%	17.7
WES	$15,356.40M	70.9%	10.9