| # | Company | Employees |
|---|---|---|
| 1 |
Con Edisonconed.com
Providing reliable electricity to millions, focusing on clean energy transition, energy efficiency, and infrastructure resilience against extreme weather. |
9,822 |
| 2 |
Loews Corporationloews.com
Diversified company managing subsidiaries in insurance, pipelines, hotels, and packaging, providing strategic direction and corporate services to all. |
8,020 |
| 3 |
Hess Corporationhess.com
A global energy company engaged in oil and gas exploration and production, with operations in North Dakota, Gulf of Mexico, Malaysia, Thailand, Guyana, and Suriname |
4,392 |
| 4 |
Steel Partners Holdingssteelpartners.com
A global diversified holding company engaging in multiple businesses through subsidiaries, associated companies, and other interests |
1,699 |
| 5 |
Toyota Tsusho Americataiamerica.com
A subsidiary of Toyota Tsusho Corporation, this company in North America trades commodities, offers supply-chain services, and processes intermediate goods |
1,275 |
| 6 |
Hartree Partnershartreepartners.com
Specializing in physical and financial energy and commodities markets, we assist customers in exploring new opportunities for maximum revenues with minimum risk |
986 |
| 7 |
LS Powerlspower.com
A leading North American power and energy infrastructure company, specializing in development, investment, and operation of various energy solutions and technologies |
596 |
| 8 |
New Fortress Energynewfortressenergy.com
A global energy company aiming to provide affordable, clean energy solutions by replacing oil-based fuels with natural gas |
584 |
| 9 |
Autel Energyautelenergy.com
Provider of EV charging products and services, offering smart charging solutions to accelerate the transition to renewable energy for a sustainable future |
244 |
| 10 |
Brookfield Renewable N.A.brookfieldrenewableus.com
A leading developer and operator of renewable power, offering innovative solutions to accelerate the world towards a sustainable, low-carbon future |
232 |
| 11 |
GenServegenserveinc.com
Specializing in comprehensive power solutions to ensure uninterrupted operation for all clients, with a focus on keeping the power ON |
201 |
| 12 |
SmartEnergy.comsmartenergy.com
This company is an independent energy supplier focused on providing affordable green energy sourced from solar, wind, hydroelectric, and geothermal resources |
167 |
| 13 |
Red Apple Groupragny.com
A diverse conglomerate managing assets across energy, real estate, finance, insurance, and supermarket industries |
157 |
| 14 | 154 | |
| 15 |
Luminaceluminace.com
Leading decarbonization-as-a-service provider in North America, offering renewable energy solutions such as solar, energy storage, EV solutions, and energy efficiency upgrades to various sectors |
139 |
| 16 |
Greenbackergreenbackercapital.com
An independent power producer and investment manager specializing in clean energy projects, promoting sustainable infrastructure investments for a greener future |
130 |
| 17 |
Convergent Energy and Powerconvergentep.com
Energy storage company providing development services for grid operators, utilities, and industrial clients to reduce costs, ensure power quality, and solve infrastructure challenges in North America |
129 |
| 18 |
Petro River Oil / Petro Springpetroriveroil.godaddysites.com
Energy company applying modern technologies to conventional and non-conventional oil and gas assets in Oklahoma, with a technology-focused subsidiary for commercializing cutting-edge technologies |
115 |
| 19 |
Aspen Poweraspenpower.com
A team of experts in financing, development, construction, and asset management of distributed clean energy assets, partnering with local developers for sustainable energy solutions |
103 |
| 20 |
energyReenergyre.com
energyRe develops large-scale clean energy solutions, from generation to transmission, with expertise in financial packaging, engineering, construction management, and regulatory affairs |
71 |
| 21 |
Xealxealenergy.com
Technology-first EV charging company striving for mass adoption, focusing on mobility, real estate, IoT, and energy, with solutions for smart cities and the built environment |
70 |
| 22 |
Onyx Renewable Partners L.P.onyxrenewables.com
National provider of clean energy solutions for commercial and industrial entities, offering expertise in solar, storage, EV charging, and carbon emission reduction Headquarters in NYC |
59 |
| 23 |
INF Associatesinfassociates.com
Energy solutions integrator specializing in decarbonization of transportation and buildings, offering clean energy management solutions customized for various sectors and clients |
40 |
| 24 |
HRG Group, Inc.hrggroup.com
A diversified holding company focused on businesses generating sustainable cash flow through consumer products, insurance, loans, and energy assets |
37 |
| 25 |
Catalyst Power Holdings LLCcatalystpower.com
Catalyst Power offers innovative and scalable energy solutions for commercial and industrial clients, including onsite solar, natural gas engines, and retail energy supply |
32 |
| 26 |
Convalt Energyconvalt.com
A global renewable energy firm developing solar, wind, waste to power projects, upgrading hydro plants, and focusing on transmission and distribution |
31 |
| 27 |
Aggressive Energyaggressiveenergy.com
A leading, full-service energy company supplying natural gas and electric to commercial and industrial customers in multiple states with personalized service and market expertise |
30 |
| 28 |
Novelenovele.com
Innovative company offering IoT energy storage solutions for urban environments, with a focus on scalable and cost-effective resiliency solutions |
27 |
| 29 |
Hydrominehydromineinc.com
A US-based sustainable energy company investing in low-carbon power production worldwide, with a focus on social engagement and environmental stewardship |
25 |
| 30 |
MGN MicroGrid Networks LLCmgn.energy
This company develops, constructs and operates resilient clean energy generation and storage systems in New York City to enhance resiliency and promote sustainability |
20 |
| 31 |
SOLO Energy & Electricalsoloenergy.com
Sustainable energy service company focused on energy efficiency, electrification, and renewable solutions |
19 |
| 32 |
NextGen
A top investor and operator of energy solutions in North America and Asia, specializing in next-generation infrastructure development |
19 |
| 33 |
Wright Energy Storage Technologieswright.energy
Specializing in energy storage and power optimization, the company produces high-power systems for commercial, consumer, and humanitarian applications to improve global energy infrastructure |
17 |
| 34 |
Daroga Powerdgpwr.com
A sustainable infrastructure and distributed power developer focused on decarbonization through solar, fuel cell, and hydrogen technologies for various sectors |
12 |
| 35 |
Coevo Energycoevoenergy.com
A clean energy startup focused on innovating efficient, cost-effective renewable energy solutions to bridge the gap between current and needed production levels |
11 |
| 36 |
Uprisun Energyuprisun.com
Specializing in the development of renewable energy projects, this firm provides tailored solutions in the sustainable energy sector |
10 |
| 37 |
Petro Energy Globalpetroenergyglobal.com
An energy technology company that designs, manufactures, and provides transformative service technologies for reservoir optimization, drilling programs, and gas kick control |
8 |
| 38 |
Lotus Energy GroupLotusEnergyGroup.com
Global energy infrastructure provider specializing in high efficiency gas turbine generation, advanced energy projects, renewable energy integration, and retail generation systems with headquarters in New York |
8 |
| 39 |
Okra Energy LNG + LNG Technologyokraenergy.com
This company delivers affordable, environmentally-friendly energy while driving investor returns by connecting stranded energy and customers through innovative solutions |
6 |
| 40 |
Rhynland Energyrhynland.com
Specializes in developing energy and infrastructure projects to drive sustainable growth and innovation in the industry |
6 |
| 41 |
Clean Slate Solarcleanslatesolar.com
The company offers sustainable solar energy solutions through designing, developing, and financing community solar projects on commercial and industrial properties |
6 |
| 42 |
Cygnus Energy Group, LLCcygnusenergygroupllc.com
An integrated fuel and energy marketing company offering bulk fuels, renewable energy solutions, and facilitating large scale fuel purchases and contracts |
5 |
| 43 |
SandPoint Partnerssandpointpartners.com
Private exploration and production company focusing on acquiring and developing conventional oil and gas assets with a technical, sustainable approach and strong stakeholder relationships |
5 |
| 44 |
LatAm BioEnergylatambioenergy.com
This company provides innovative clean energy solutions using advanced engineering technologies to meet global energy demands sustainably |
4 |
| 45 |
My Energy General Tradingmy-energy.net
A leading energy group in the US providing a range of diverse energy solutions and services to customers nationwide |
4 |
| 46 |
H2-INDUSTRIES SEh2-industries.com
Specializing in energy storage solutions, our company enables the storage, transport, and decentralized release of renewable energy, regardless of capacity |
3 |
| 47 |
42 Renewables LLC42renew.com
A pioneering clean energy and battery storage company focused on affordable, sustainable, and efficient renewable energy solutions to combat climate change |
3 |
| 48 |
Blue Redwoodblueredwood.com
A renewable energy developer working with local landowners to create clean energy projects that benefit communities and prioritize quality and sustainability |
3 |
| 49 |
Avatu, LLC
Advanced energy innovator developing and operating distributed energy resources, specializing in grid-stabilizing storage solutions for producers, suppliers, and consumers |
2 |
| 50 |
Altus Energy Groupaltusenergygroup.com
The company specializes in renewable energy solutions including electric vehicle charging, energy storage, solar, biomass, and microgrids for green cities |
2 |
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 24, 2026.
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