These companies with in-house R&D in Rio de Janeiro State are primarily large organizations in the energy, mining, and public health sectors. Vale, a global mining company, and Petrobras, an energy solutions provider, are among the largest. Other significant players include Neoenergia S.A., a leader in the Brazilian electricity sector, and Eletrobras, an oil and gas company focused on clean energy.
The list also features several prominent higher education and research institutions, such as the Federal University of Rio de Janeiro and FIOCRUZ, which specializes in public health research. A notable pattern is the concentration of headquarters in Rio de Janeiro city, with a few companies like Oceanica and IFF - Instituto Federal Fluminense based in Macaé and Universidade Federal Fluminense in Niterói.
| # | 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 |
Federal University of Rio de Janeiroufrj.br
A well-established and internationally respected institution, with historical roots dating back to the 18th century, offering a wide range of academic programs |
10,389 | |||
| 6 |
Universidade Federal Fluminenseuff.br
A leading educational institution with diverse programs including undergraduate and graduate courses, as well as specialization and medical residency programs |
8,445 | |||
| 7 |
FIOCRUZ - Fundação Oswaldo Cruzen.wikipedia.org
A Brazilian institution focused on research and development in biological sciences, specializing in public health research and founded by Dr Oswaldo Cruz in 1900 |
4,448 | |||
| 8 |
Fiocruzfiocruz.br
Promoting health and social development, generating and disseminating scientific and technological knowledge, and promoting citizenship through healthcare research and technology |
3,625 | |||
| 9 |
Oceanicaoceanica.com.br
Brazilian provider of services and engineering technology solutions for organizations involved in underwater activities |
2,672 | |||
| 10 |
Companhia Municipal de Limpeza Urbana - COMLURBrio.rj.gov.br
The organization is a major public cleaning entity in Latin America, focusing on urban cleaning services in Rio de Janeiro |
2,595 | |||
| 11 |
Grupo Bom Jesusbomjesus.com
The company trades commercial and seed soybeans, corn, cottonseed, and cotton lint. It also trades beans, sorghum, and seeds on a smaller scale. |
2,375 | |||
| 12 |
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 | |||
| 13 |
Bio-Manguinhos / Fiocruzbio.fiocruz.br
A leading unit of a health foundation, producing vaccines, diagnostic kits, and biopharmaceuticals since 1976 to meet public health needs |
1,665 | |||
| 14 | 1,336 | ||||
| 15 |
Fundação Oswaldo Cruz (Fiocruz)fiocruz.br
Public health institution affiliated with the Ministry of Health, dedicated to healthcare services and initiatives in the public sector |
1,328 | |||
| 16 |
IFF - Instituto Federal Fluminenseportal1.iff.edu.br
A specialized educational institution offering a range of professional and technological education programs across various campuses |
1,154 | |||
| 17 |
ICONICiconic.com.br
A market-leading company formed from the merger of two lubricant businesses, specializing in development, production, and distribution of a wide range of products |
989 | |||
| 18 |
Instituto Nacional de Traumatologia e Ortopediainto.saude.gov.br
Specializing in treating complex orthopedic diseases and traumas, the organization excels in surgical procedures and research, with a focus on quality and innovation |
891 | |||
| 19 |
Farmanguinhos / Fiocruzfar.fiocruz.br
A technical-scientific unit focused on education, research, technological innovation, and drug production, specialized in essential medications, cost reduction, and public health access |
745 | |||
| 20 | 711 | ||||
| 21 |
Sondotécnica Engenhariasondotecnica.com.br
A multidisciplinary engineering organization specializing in structural design, hydrology, oceanography, sediment transport, and feasibility studies with extensive project experience globally |
682 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 22 | 598 | ||||
| 23 |
FGV Brazilportal.fgv.br
A leading institution focused on promoting social and economic development through research, innovation, and consulting in various fields globally |
585 | |||
| 24 | 577 | ||||
| 25 |
Condor Non-Lethal Technologiescondornaoletal.com.br
A Brazilian defense and security company specializing in non-lethal technologies, with over 35 years of experience exporting innovative products globally |
575 | |||
| 26 |
SENAI CETIQTsenaicetiqt.com
A leading Latin American center providing education, technology, and innovation services for the chemical and textile industries, focusing on real-world solutions Visit the website for more information |
524 | |||
| 27 |
Tecgraf / PUC-Riotecgraf.puc-rio.br
Innovative RD&I institute at PUC-Rio campus, integrating competencies to develop computer systems and solutions in digital tech, data science, and more |
478 | |||
| 28 |
Megalabs Brasillinktr.ee
We are a pharmaceutical industry focused on innovation, providing affordable therapeutic solutions in Latin America with a modern manufacturing facility and strong presence in multiple countries |
472 | |||
| 29 |
Wärtsilä Brasilwartsila.com
A global leader in advanced technologies for maritime and energy markets, emphasizing innovation and efficiency to maximize environmental and economic performance |
437 | |||
| 30 |
[Brazil] HD Construction Equipmenthd-ce.com
A Brazilian company manufacturing and exporting construction equipment machines and forklifts, focusing on customer needs and adapting to the market |
409 | |||
| 31 |
Bombas Dancordancor.com.br
A company founded in 1946 with three industrial plants, advanced technology, and research for high-quality products and customer service nationwide |
377 | |||
| 32 |
Oil States Brasiloilstates.com
Engineering, project management, welding, fabrication, testing, and offshore services for players in the energy market with 24/7 capabilities in Brazil |
376 | |||
| 33 |
Nuclebras Equipamentos Pesados S A Nuclepnuclep.gov.br
Established in 1975, this company specializes in manufacturing replacement equipment for nuclear power plants, focusing on innovation and technology |
359 | |||
| 34 |
Nortec Quimica S/A.nortecquimica.com.br
Manufacturer of active pharmaceutical ingredients for brand medicines, generics, Brazilian public health systems, and neglected diseases in alignment with WHO guidelines |
351 | |||
| 35 |
Fábrica Carioca de Catalisadores S.A.fccsa.com.br
A leading Brazilian producer of catalysts and additives for the oil refining industry, with over 30 years of experience in innovation and sustainability |
348 | |||
| 36 |
Diffucapdiffucap.com.br
Specialized pharmaceutical manufacturer producing extended-release microgranules and tablets Own branded products, contract manufacturing, and exporting to various Latin American countries |
330 | |||
| 37 |
Instituto Vital Brazilrj.gov.br
A public laboratory in Brazil producing human medicines and serums, conducting research in pharmaceutical, biological, economic, and social fields since 1919 |
327 | |||
| 38 |
MXM Sistemasmxm.com.br
With over 30 years of experience, this platform offers a 100% SaaS ERP solution that drives digital transformation for national and multinational organizations |
326 | |||
| 39 |
Confitecconfitec.com.br
Developing innovative, efficient solutions for the insurance industry, focusing on control, reliability, and security to promote personal and professional growth |
311 | |||
| 40 |
Universidade Federal do Rio de Janeiroufrj.br
A prestigious and internationally respected university, established in 1920 by the Federal Government, offering a wide range of academic programs |
307 | |||
| 41 |
SICPA América do Sulsicpa.com
Leading provider of security solutions in identification, traceability, and authentication for governments, industries, and high-security prints worldwide With expertise in security inks |
222 | |||
| 42 |
Confiance Medicalconfiancemedical.com.br
Leading Brazilian manufacturer of Videocirurgia equipment, prioritizing innovation and commitment to surgeons, medical research community, and patients Recognized as a top workplace |
183 | |||
| 43 | 
Sociedade Michelin De Participacoes Indust E Comerciomichelin.com.br
A global leader in manufacturing and selling tires for various vehicles, with a strong focus on sustainable growth, competitiveness, and social/environmental commitment |
164 | |||
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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 Nov 12, 2026.
More company lists in Rio de Janeiro State
- The largest companies in Rio de Janeiro State 1,426
- Retail chains in Rio de Janeiro State 171
- Critical infrastructure operators in Rio de Janeiro State 136
- Education providers in Rio de Janeiro State 123
- Healthcare providers in Rio de Janeiro State 104
- Retail companies in Rio de Janeiro State 100
- Financial services firms in Rio de Janeiro State 97
- Manufacturers in Rio de Janeiro State 97
- Multinational companies in Rio de Janeiro State 94
- Companies with a mobile app in Rio de Janeiro State 83
- Public sector organisations in Rio de Janeiro State 79
- E-commerce companies in Rio de Janeiro State 76
- Energy companies in Rio de Janeiro State 68
- Hospitals and Health Care companies in Rio de Janeiro State 66
- Professional services firms in Rio de Janeiro State 60
- Financial Services companies in Rio de Janeiro State 58
- Logistics companies in Rio de Janeiro State 56
- Oil and Gas companies in Rio de Janeiro State 53
- Government Administration companies in Rio de Janeiro State 48
- Corporate groups and holding companies in Rio de Janeiro State 48
- Franchise networks in Rio de Janeiro State 45
- Higher Education companies in Rio de Janeiro State 45
- Wellness and Fitness Services companies in Rio de Janeiro State 43
- Facility management companies in Rio de Janeiro State 39
The same list elsewhere in Brazil
- Companies with in-house R&D in Brazil 755
- Companies with in-house R&D in São Paulo State 370
- Companies with in-house R&D in Minas Gerais 62
- Companies with in-house R&D in Paraná 61
- Companies with in-house R&D in Santa Catarina 58
- Companies with in-house R&D in Rio Grande do Sul 42
- Companies with in-house R&D in São Paulo 145
- Companies with in-house R&D in Rio de Janeiro 32