Enbridge Inc., together with its subsidiaries, operates as an energy infrastructure company. The company operates through five segments: Liquids Pipelines, Gas Transmission and Midstream, Gas Distribution and Storage, Renewable Power Generation, and Energy Services. The Liquids Pipelines segment operates pipelines and related terminals to transport various grades of crude oil and other liquid hydrocarbons in Canada and the United States. The Gas Transmission and Midstream segment invests in natural gas pipelines and gathering and processing facilities in Canada and the United States. The Gas Distribution and Storage segment is involved in natural gas utility operations serving residential, commercial, and industrial customers in Ontario, as well as natural gas distribution activities in Quebec. The Renewable Power Generation segment operates power generating assets, such as wind, solar, geothermal, waste heat recovery, and transmission assets in North America. The Energy Services segment provides physical commodity marketing and logistical services to refiners, producers, and other customers in Canada and the United States. The company was formerly known as IPL Energy Inc. and changed its name to Enbridge Inc. in October 1998. Enbridge Inc. was founded in 1949 and is headquartered in Calgary, Canada.

Canadian Natural Resources Limited acquires, explores for, develops, produces, markets, and sells crude oil, natural gas, and natural gas liquids (NGLs). The company offers light and medium crude oil, primary heavy crude oil, Pelican Lake heavy crude oil, bitumen (thermal oil), and synthetic crude oil (SCO). The company's midstream assets include two pipeline systems; and a 50% working interest in an 84-megawatt cogeneration plant at Primrose. It operates primarily in Western Canada; the United Kingdom portion of the North Sea; and Offshore Africa. The company was formerly known as AEX Minerals Corporation and changed its name to Canadian Natural Resources Limited in December 1975. Canadian Natural Resources Limited was incorporated in 1973 and is headquartered in Calgary, Canada.

Kinder Morgan, Inc. operates as an energy infrastructure company primarily in North America. The company operates through Natural Gas Pipelines, Products Pipelines, Terminals, and CO2 segments. The Natural Gas Pipelines segment owns and operates interstate and intrastate natural gas pipeline, and 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 gasification, 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, renewable fuel and feedstocks, 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 82,000 miles of pipelines and 139 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 1997 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.

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.

Pembina Pipeline Corporation provides energy transportation and midstream services. It operates through three segments: Pipelines, Facilities, and Marketing & New Ventures. The Pipelines segment operates conventional, oil sands and heavy oil, and transmission assets with a transportation capacity of 2.9 millions of barrels of oil equivalent per day, the ground storage capacity of 10 millions of barrels, and rail terminalling capacity of approximately 105 thousands of barrels of oil equivalent per day serving markets and basins across North America. The Facilities segment offers infrastructure that provides customers with natural gas, condensate, and natural gas liquids (NGLs), including ethane, propane, butane, and condensate; and includes 354 thousands of barrels per day of NGL fractionation capacity, 21 millions of barrels of cavern storage capacity, and associated pipeline, and rail terminalling facilities and a liquefied propane export facility. The Marketing & New Ventures segment buys and sells hydrocarbon liquids and natural gas originating in the Western Canadian sedimentary basin and other basins. Pembina Pipeline Corporation was incorporated in 1954 and is headquartered in Calgary, Canada.

TransAlta Corporation engages in the development, production, and sale of electric energy. It operates through Hydro, Wind and Solar, Gas, Energy Transition, and Energy Marketing segments. The Hydro segment holds interest of approximately 922 megawatts (MW) of owned hydroelectric generating capacity located in Alberta, British Columbia, and Ontario. The Wind and Solar segment has a net ownership interest of approximately 2,057 MW of owned wind and solar electrical-generating capacity, as well as battery storage facilities located in Alberta, Ontario, New Brunswick, and Québec in Canada; the states of Massachusetts, Minnesota, New Hampshire, North Carolina, Pennsylvania, Washington, and Wyoming in the United States; and the state of Western Australia. The Gas segment has a net ownership interest of approximately 2,775 MW of owned gas electrical-generating capacity, and facilities located in Alberta, Ontario, Michigan, and the state of Western Australia. The Energy Transition segment has a net ownership interest of approximately 671 MW of owned coal electrical-generating capacity, as well as operates the Skookumchuck hydro facility in Centralia; and engages in the highvale mine and the mine reclamation activities. The Energy Marketing segment is involved in the trading of power, natural gas, and environmental products. It serves customers in various industry segments, including commercial real estate, municipal, manufacturing, industrial, hospitality, finance, and oil and gas. TransAlta Corporation was founded in 1909 and is headquartered in Calgary, Canada.

Enerflex Ltd. offers energy infrastructure and energy transition solutions to natural gas markets in North America, Latin America, and the Eastern Hemisphere. The company provides natural gas compression infrastructure, processing, and treated water infrastructure under contract to oil and natural gas customers; power generation rental solutions; custom and standard compression packages for reciprocating and screw compressor applications; re-engineering, re-configuration, and re-packaging of compressors for various field applications; integrated turnkey power generation, gas compression, processing facilities, natural gas compression, processing, and electric power solutions; after-market mechanical services and parts distribution, as well as maintenance solutions to the oil and natural gas industry, operations, and overhaul services; and equipment supply, parts supply, and general asset management. It also designs, engineers, manufactures, constructs, and installs modular natural gas processing equipment, low-carbon solutions, cryogenic systems, electric power solutions, and treated water solutions; and engages in the engineering, design, procurement, project management, and construction services for compression, process, treated water, and power generation equipment, as well as after-market service, parts, and operations and maintenance services for gas compression, processing, and treated water facilities in the region. The company was formerly known as Enerflex Systems Income Fund and changed its name to Enerflex Ltd. in January 2010. Enerflex Ltd. was founded in 1980 and is headquartered in Calgary, Canada.