| # | Company | Employees |
|---|---|---|
| 1 | 71,933 | |
| 2 |
Petrobraspetrobras.com.br
The company aims to provide ethical, safe, and competitive energy solutions while focusing on sustainability, environmental responsibility, and employee well-being |
56,267 |
| 3 |
Neoenergia S.A.neoenergia.com
Open capital company, Brazilian electricity sector leader. Operations span generation, transmission, distribution, and commercialization, serving 16 million customers across 18 states. |
16,000 |
| 4 |
Eletrobraseletrobras.com
Generation, transmission, commercialization, and energy efficiency programs; electric sector leader in Latin America, clean and renewable energy matrix. |
13,000 |
| 5 |
Ipirangaipiranga.com.br
Provider of quality fuels and services for industry, transportation, and logistics in Brazil, focusing on customer relationships, innovation, and sustainability initiatives |
8,612 |
| 6 |
Lightlight.com.br
Provides essential energy distribution, generation, and services to over 10 million people in 31 municipalities in the state of Rio de Janeiro, Brazil. |
7,516 |
| 7 |
Vibravibraenergia.com.br
Largest multienergy platform in the country, leading in fuel distribution, licensed to operate Petrobras and BR Aviation brands. |
6,425 |
| 8 |
Transpetro - Petrobras Transporte S. A.transpetro.com.br
Provider of logistics solutions for the oil and gas industry, operating terminals, pipelines, ships, and storage facilities for oil, derivatives, and biofuels |
5,169 |
| 9 |
Supergasbras Energia Ltdasupergasbras.com.br
We are a leading distributor of LP Gas in Brazil, providing customized energy solutions to households and businesses, with a focus on quality, safety, and environmental sustainability |
4,857 |
| 10 |
Elecnor do Brasilelecnor.com.br
Global engineering and construction firm with a focus on infrastructure projects, renewable energy, and environmental initiatives, operating in 53 countries worldwide |
3,720 |
| 11 |
Gran Services S.A.granihc.com
The company provides engineering, commissioning, and integrity management services for floating assets in the energy sector, as well as fiberglass composite materials for offshore industries |
3,589 |
| 12 |
Enevaeneva.com.br
A leading integrated energy operator, involved in exploration, production, and supply of energy solutions Operates gas fields and power generation assets across Brazil |
2,771 |
| 13 |
Oceanicaoceanica.com.br
Brazilian provider of services and engineering technology solutions for organizations involved in underwater activities |
2,672 |
| 14 |
BR Distribuidoravibraenergia.com.br
Energy distributor undergoing rebranding, active on social media platforms with a focus on oil and gas distribution and related services |
2,641 |
| 15 |
Ocyanocyan-sa.com
Specializing in sustainable solutions for the offshore oil and gas industry, the company focuses on safety, client partnership, and ethical operations with drilling and FPSO services |
2,637 |
| 16 |
Constellation Oil Servicestheconstellation.com
A drilling contractor specializing in deep and ultra-deepwater drilling, with a focus on safety, trust, excellence, and sustainability in operations |
2,357 |
| 17 |
PETROBRAS PETROLEO BRASILEIRO SApetrobras.com.br
A publicly traded company in the Oil and Gas industry, headquartered in Rio de Janeiro, founded in 1953 |
2,085 |
| 18 |
Eletronucleareletronuclear.gov.br
produces electricity from nuclear sources, operating Angra 1 and Angra 2 plants, supplying significant power to Rio de Janeiro with a focus on safety and environmental monitoring. |
2,020 |
| 19 |
Grupo Bravantebravante.com.br
A Brazilian group with over 50 years of experience providing services in oil and gas, marine support, port support, shipbuilding, repair, and environmental protection |
1,914 |
| 20 |
PRIOprio3.com.br
Leading independent oil and gas company in Brazil, focusing on efficient reservoir management and redeveloping mature fields with innovative approaches |
1,843 |
| 21 |
Cobra Brasilgrupocobra.com
Global leader in developing, building, and operating industrial facilities with a focus on renewable energy, environmental solutions, engineering, and infrastructure services worldwide |
1,826 |
| 22 |
Prumoprumologistica.com.br
A multi-business economic group developing a sustainable and competitive port-industry, expanding a business ecosystem while prioritizing environmental protection and ESG commitments |
1,560 |
| 23 |
Odebrecht Óleo e Gásodebrechtoilgas.com
Provider of integrated solutions for the upstream oil and gas industry, offering services in offshore drilling, subsea construction, production, logistics, maintenance, and well services |
1,290 |
| 24 |
Transmissora Aliança de Energia Elétrica - TAESAtaesa.com.br
A leading Brazilian group dedicated to electric power transmission, focusing on technical excellence, sustainability, and innovation to connect Brazil with reliable energy |
1,225 |
| 25 |
Ventura Offshorepetroservmarineinc.com
A Brazilian company providing drilling, completion, intervention, and production services for oil and gas wells, with a focus on quality, safety, and compliance |
1,205 |
| 26 |
State Grid Brazil Holding S.A.stategrid.com.br
A subsidiary of a Chinese state-owned company, operating and maintaining seven energy transmission concessions in Brazil since 2010 |
1,181 |
| 27 |
Origem Energiaorigemenergia.com
Established in 2017, it specializes in energy integration across different sectors and operates across various states, offering a diverse portfolio of energy solutions |
1,090 |
| 28 |
Roda Conveniênciarodaconveniencia.com.br
Leader in retail tech, specializing in micro markets, bringing well-being and convenience to over 150 offices and residential condos in Rio de Janeiro and Niterói |
1,004 |
| 29 |
CYMI BRASILcymi.com.br
With over 60 years of experience, we specialize in infrastructure concessions, energy transmission, substations, and now also operate in sanitation and renewable energy sectors |
992 |
| 30 |
EBXebx.com.br
Global Brazilian group implementing transformative investments in strategic areas, generating wealth and jobs through listed companies in various industries worldwide Operations in multiple countries |
958 |
| 31 |
Refitrefit.com.br
A Brazilian refinery dedicated to producing Gasolina A, investing in modernization, governance practices, and delivering quality fuel to customers |
936 |
| 32 |
INBinb.gov.br
The business operates in the nuclear fuel supply chain, including mining, processing, enrichment, and fuel fabrication for Brazilian nuclear power plants |
930 |
| 33 |
Estaleiro Brasaestaleiro-brasa.com.br
Specialized in constructing topside modules and integrating FPSO platforms for the oil and gas industry Also offers logistics support, cargo handling, repair, and maintenance services offshore |
762 |
| 34 |
Norskan Offshoredof.com
A Brazilian company backed by a Norwegian group, NorSkan Offshore invests in the Brazilian naval industry and manages state-of-the-art vessels for the offshore market |
751 |
| 35 |
Vertical Groupverticalgroup.com.br
Specialized in working at heights, servicing complex naval and industrial projects with a focus on safety, quality, and environmental responsibility |
745 |
| 36 |
SISTACsistac.com.br
Leading provider of engineering solutions for inspection, maintenance, and repair in the offshore oil & gas industry in Brazil, prioritizing safety, quality, and sustainability |
742 |
| 37 |
Grupo Queiroz Galvãoqueirozgalvao.com.br
The company focuses on providing infrastructure for growth, social development, and environmental respect through various sectors like construction, real estate, and oil & gas |
725 |
| 38 | 711 | |
| 39 |
Altera&Ocyanocyan-sa.com
Altera&Ocyan is a sustainable company providing solutions for the offshore upstream oil and gas industry in Brazil and internationally |
597 |
| 40 |
Sapura Navegação Marítima S.A.seagems.com.br
Specializing in subsea services, this Brazilian joint venture operates a fleet of vessels for support, installation, and pipe laying with a global presence in over 20 countries |
587 |
| 41 |
TAGntag.com.br
Transporting gas across 10 Brazilian states, integrating energy from various sources to distribution networks, and providing proactive logistical solutions for energy security. |
419 |
| 42 |
VINCI Energies Brasilvinci-energies.com.br
The company focuses on connectivity, energy efficiency, and digital evolution to implement new technologies in energy, industry, and communication infrastructures |
160 |
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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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