Cummins Inc. designs, manufactures, distributes, and services diesel and natural gas engines, electric and hybrid powertrains, and related components worldwide. It operates through five segments: Engine, Distribution, Components, Power Systems, and Accelera. The company offers diesel and natural gas-powered engines under the Cummins and other customer brands for the heavy and medium-duty truck, bus, recreational vehicle, light-duty automotive, construction, mining, marine, rail, oil and gas, defense, and agricultural markets; and offers parts and services, as well as remanufactured parts and engines. It provides power generation systems, horsepower engines, heavy and medium duty engines, application engineering services, custom-designed assemblies, retail and wholesale aftermarket parts, and in-shop and field-based repair services. In addition, the company offers emission solutions; turbochargers; air and fuel filters, fuel water separators, lube and hydraulic filters, coolants, fuel additives, and other filtration systems; and electronic control modules, sensors, and supporting software, as well as new, replacement, and remanufactured fuel systems. Further, it provides automated transmissions; standby and prime power generators, controls, paralleling systems, and transfer switches, as well as A/C generator/alternator products under the Stamford and AVK brands; and electrified power systems with components and subsystems, including battery, fuel cell, and hydrogen production technologies. Additionally, it offers filtration, aftertreatment, controls systems, air handling systems, and electric power generation systems, and batteries. It sells its products to original equipment manufacturers, distributors, dealers, and other customers. The company was formerly known as Cummins Engine Company and changed its name to Cummins Inc. in 2001. Cummins Inc. was founded in 1919 and is headquartered in Columbus, Indiana.

Westinghouse Air Brake Technologies Corporation, together with its subsidiaries, provides technology-based locomotives, equipment, systems, and services for the freight rail and passenger transit industries worldwide. It offers diesel-electric, battery, and liquid natural gas-powered locomotives; engines, electric motors, and propulsion systems; and marine and mining products. The company also offers positive train control equipment; pneumatic braking products; railway electronics; signal design and engineering services; distributed locomotive power, train cruise controls, and train remote controls; industrial/mobile Internet of Things hardware and software, edge-to-cloud, on and off-board analytics and rules, and asset performance management solutions; rail and shipper transportation management, and port visibility and optimization solutions; and network optimization solutions. In addition, it provides freight car trucks, braking equipment, and related components; air compressors and dryers; heat transfer components and systems; track and switch products; new commuter and switcher locomotives; and turbochargers. Further, the company offers freight locomotive overhauls, modernizations, and refurbishment services; locomotive and car maintenance; transit locomotive and car overhaul; unit exchange of locomotive components; and maintenance of way equipment and services. Additionally, it provides railway and freight braking equipment and related components; friction products, such as brake shoes, discs, and pads; heating, ventilation, and air conditioning equipment; access and platform screen doors; pantographs; auxiliary power converter and battery chargers; passenger information systems and closed-circuit television; signaling and railway electric relays; and doors, window assemblies, accessibility lifts, ramps, and electric charging solutions for buses. The company was founded in 1869 and is headquartered in Pittsburgh, Pennsylvania.

Woodside Energy Group Ltd engages in the exploration, evaluation, development, production, and marketing of hydrocarbons in the Asia Pacific, Africa, the Americas, and the Europe. The company produces liquefied natural gas, pipeline gas, crude oil and condensate, and natural gas liquids. It holds interests in the Pluto LNG, North West Shelf, Wheatstone and Julimar-Brunello, Bass Strait, Ngujima-Yin FPSO, Okha FPSO, Pyrenees FPSO, Macedon, Shenzi, Mad dog, Greater Angostura, as well as Scarborough, Sangomar, Trion, Calypso, Browse, Liard, Atlantis, Woodside Solar opportunity, and Sunrise and Troubadour. The company involves in development of new energy products and carbon services. The company was formerly known as Woodside Petroleum Ltd and changed its name to Woodside Energy Group Ltd in May 2022. Woodside Energy Group Ltd was founded in 1954 and is headquartered in Perth, Australia.

Ingevity Corporation manufactures and sells activated carbon products, derivative specialty chemicals, and engineered polymers in North America, the Asia Pacific, Europe, the Middle East, Africa, and South America. It operates through three segments: Performance Materials, Performance Chemicals, and Advanced Polymer Technologies. The Performance Materials segment engineers, manufactures, and sells hardwood-based and chemically activated carbon products for use in gasoline vapor emission control systems in cars, motorcycles, trucks, and boats. This segment also produces other activated carbon products for food, water, beverage, and chemical purification applications. The Performance Chemicals segment consists of road technologies and industrial specialties. This segment's products are used in pavement construction, pavement preservation, pavement reconstruction and recycling, road markings, agrochemical dispersants, paper chemicals, and other industrial uses. The Advanced Polymer Technologies segment produces caprolactone and caprolactone-based specialty polymers for use in coatings, resins, elastomers, adhesives, bioplastics, and medical devices. It serves automotive parts and components manufacturers through sales representatives and distributors. The company was formerly known as WestRock Company, Specialty Chemicals Business and changed its name to Ingevity Corporation in September 2015. Ingevity Corporation was founded in 1964 and is headquartered in North Charleston, South Carolina.

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.

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.

Ballard Power Systems Inc. engages in the design, development, manufacture, sale, and service of proton exchange membrane (PEM) fuel cell products. The company offers its products for power product comprising for bus, truck, rail, marine, stationary, and emerging market, such as material handling, off-road, and other applications. It also engages in the delivery of services, including technology solutions, after sales services, and training; and provision of engineering services, product and systems integration services, and related technology transfer for a variety of PEM fuel cell applications. It operates in the United States, Germany, Canada, China, Poland, the United Kingdom, the Netherlands, France, Denmark, Belgium, India, Taiwan, Spain, Norway, Australia, Japan, and internationally. The company has a strategic alliance with Linamar Corporation for the co-development and sale of fuel cell powertrains and components for class 1 and 2 vehicles in North America and Europe. Ballard Power Systems Inc. was founded in 1979 and is headquartered in Burnaby, Canada.

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.