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.

Avangrid, Inc., an energy services holding company, engages in the regulated energy transmission and distribution, and renewable energy generation businesses in the United States. The company operates through Networks and Renewables segments. It is involved in the generation, transmission, and distribution of electricity; and distribution, transportation, and sale of natural gas. In addition, the company operates renewable energy generation facilities primarily using onshore wind power, as well as solar, biomass, and thermal power. Further, it delivers natural gas and electricity to residential, commercial, and institutional customers through its regulated utilities in New York, Maine, Connecticut, and Massachusetts; and sells its output to investor-owned utilities, public utilities, and other credit-worthy entities, as well as generates and provides power and other services to federal and state agencies, institutional retail, and joint action agencies. Additionally, the company delivers thermal output to wholesale customers in the Western United States. It owns eight electric and natural gas utilities, serving 3.3 million customers in New York and New England, as well as owns and operates 9.3 gigawatts of electricity capacity primarily through wind power in 22 states. Avangrid, Inc. was incorporated in 1997 and is headquartered in Orange, Connecticut. The company operates as a subsidiary of Iberdrola, S.A.

National Fuel Gas Company operates as a diversified energy company. It operates through four segments: Exploration and Production, Pipeline and Storage, Gathering, and Utility. The Exploration and Production segment explores for, develops, and produces natural gas and oil. The Pipeline and Storage segment provides interstate natural gas transportation services through an integrated gas pipeline system in Pennsylvania and New York; and storage services through its underground natural gas storage fields. This segment also transports and stores natural gas for National Fuel Gas Distribution Corporation, as well as for utilities, industrial companies, and power producers in New York State. The Gathering segment builds, owns, and operates gathering facilities in the Appalachian region, as well as provides gathering services to Seneca. The Utility segment sells natural gas to retail customers; and provides natural gas utility services to various customers in Buffalo, Niagara Falls, and Jamestown, New York, as well as in Erie and Sharon, Pennsylvania. National Fuel Gas Company was incorporated in 1902 and is headquartered in Williamsville, New York.

Global Partners LP engages in the purchasing, selling, gathering, blending, storing, and logistics of transporting gasoline and gasoline blendstocks, distillates, residual oil, renewable fuels, crude oil, and propane to wholesalers, retailers, and commercial customers. The company operates through three segments: Wholesale, Gasoline Distribution and Station Operations, and Commercial. The Wholesale segment sells home heating oil, branded and unbranded gasoline and gasoline blendstocks, diesel, kerosene, and residual oil to home heating oil and propane retailers and wholesale distributors. This segment also transports the products by railcars, barges, trucks and/or pipelines. Its Gasoline Distribution and Station Operations segment sells branded and unbranded gasoline to gasoline station operators and sub-jobbers; operates gasoline stations and convenience stores; and provides car wash, lottery, and ATM services, as well as leases gasoline stations. The Commercial segment sells and delivers unbranded gasoline, home heating oil, diesel, kerosene, residual oil, and bunker fuel to customers in the public sector, as well as to commercial and industrial end-users; and sells custom blended fuels. The company is also involved in the transportation of petroleum products and renewable fuels through rail from the mid-continent region of the United States and Canada. Global Partners LP was founded in 2005 and is based in Waltham, Massachusetts.

Plug Power Inc. develops hydrogen and fuel cell product solutions in North America, Europe, Asia, and internationally. The company offers GenDrive, a hydrogen-fueled proton exchange membrane (PEM) fuel cell system that provides power to material handling electric vehicles; GenSure, a stationary fuel cell solution that offers modular PEM fuel cell power to support the backup and grid-support power requirements of the telecommunications, transportation, and utility sectors; ProGen, a fuel cell stack and engine technology used in mobility and stationary fuel cell systems, and as engines in electric delivery vans; GenFuel, a liquid hydrogen fueling delivery, generation, storage, and dispensing system; GenCare, an ongoing Internet of Things-based maintenance and on-site service program for GenDrive fuel cell systems, GenSure fuel cell systems, GenFuel hydrogen storage and dispensing products, and ProGen fuel cell engines; and GenKey, an integrated turn-key solution for transitioning to fuel cell power. It also provides electrolyzers, a hydrogen generator for clean hydrogen production; liquefaction systems that provides liquid hydrogen to customers; cryogenic equipment for the distribution of liquified hydrogen, oxygen, argon, nitrogen and other cryogenic gases, including trailers and mobile storage equipment; and liquid hydrogen, an alternative fuel to fossil-based energy. The company sells its products through a direct product sales force, original equipment manufacturers, and dealer networks. Plug Power Inc. was incorporated in 1997 and is headquartered in Latham, New York.

Suburban Propane Partners, L.P., through its subsidiaries, engages in the retail marketing and distribution of propane, renewable propane, fuel oil, and refined fuels in the United States. The company operates through four segments: Propane, Fuel Oil and Refined Fuels, Natural Gas and Electricity, and All Other. The Propane segment is involved in the retail distribution of propane for space heating, water heating, cooking, and clothes drying for use as a motor fuel in internal combustion engines to power over-the-road vehicles, forklifts, and stationary engines, as well as to fire furnaces as a cutting gas to the industrial customers; and for tobacco curing, crop drying, poultry brooding, and weed control in the agricultural markets. It also engages in the wholesale distribution of propane to industrial end users. Its Fuel Oil and Refined Fuels segment engages in the retail distribution of fuel oil, diesel, kerosene, and gasoline to residential and commercial customers for use in primarily as a source of heat in homes and buildings. The Natural Gas and Electricity segment markets natural gas and electricity to residential and commercial customers in the deregulated energy markets in New York and Pennsylvania. The All Other segment sells, installs, and services a range of home comfort equipment, including whole-house heating products, air cleaners, humidifiers, and space heaters. The company serves residential, commercial, industrial, and agricultural customers primarily in the east and west coast regions of the United States, as well as portions of the Midwest region of the United States and Alaska. Suburban Propane Partners, L.P. was founded in 1945 and is based in Whippany, New Jersey.

New Fortress Energy Inc. operates as an integrated gas-to-power energy infrastructure company that provides energy and development services to end-users worldwide. The company operates in two segments, Terminals and Infrastructure, and Ships. The Terminals and Infrastructure segment engages in the natural gas procurement and liquefaction; and shipping, logistics, facilities and conversion, or development of natural gas-fired power generation. The Ships segment offers floating storage and regasification units (FRSU) and liquefied natural gas (LNG) carriers which are leased to customers under long-term or spot arrangements. The company operates LNG storage and regasification facility at the Port of Montego Bay, Jamaica; marine LNG storage and regasification facility in Old Harbour, Jamaica; Dual-fired combined heat and power facility in Clarendon, Jamaica; landed micro-fuel handling facility in San Juan, Puerto Rico; and LNG receiving facility and gas-fired power plant in Baja Califrnia Sur, Mexico, as well as a Miami facility. New Fortress Energy Inc. was founded in 1998 and is based in New York, New York.

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.