These companies with in-house R&D in Rio de Janeiro are mostly large organizations in the energy, mining, and public health sectors. Among them are Vale, a global mining company, and Petrobras, an energy provider. Eletrobras is a Latin American leader in the electricity sector, while Neoenergia S.A. operates across generation, transmission, distribution, and commercialization of electricity.
Several institutions are dedicated to public health research and services, such as FIOCRUZ - Fundação Oswaldo Cruz, and its units Fiocruz, Bio-Manguinhos / Fiocruz, and Farmanguinhos / Fiocruz, all focused on scientific and technological knowledge for health.
| # | 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 |
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 | |||
| 7 |
Fiocruzfiocruz.br
Promoting health and social development, generating and disseminating scientific and technological knowledge, and promoting citizenship through healthcare research and technology |
3,625 | |||
| 8 |
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 | |||
| 9 |
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 | |||
| 10 | 1,336 | ||||
| 11 |
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 | |||
| 12 |
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 | |||
| 13 |
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 | |||
| 14 |
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 | |||
| 15 | 711 | ||||
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. | |||||
| 16 |
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 | |||
| 17 | 598 | ||||
| 18 |
FGV Brazilportal.fgv.br
A leading institution focused on promoting social and economic development through research, innovation, and consulting in various fields globally |
585 | |||
| 19 | 577 | ||||
| 20 |
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 | |||
| 21 |
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 | |||
| 22 |
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 | |||
| 23 |
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 | |||
| 24 |
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 | |||
| 25 |
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 | |||
| 26 |
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 | |||
| 27 |
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 | |||
| 28 |
Confitecconfitec.com.br
Developing innovative, efficient solutions for the insurance industry, focusing on control, reliability, and security to promote personal and professional growth |
311 | |||
| 29 |
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 | |||
| 30 |
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 | |||
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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 Nov 12, 2026.
More company lists in Rio de Janeiro
- The largest companies in Rio de Janeiro 1,037
- Retail chains in Rio de Janeiro 126
- Critical infrastructure operators in Rio de Janeiro 107
- Education providers in Rio de Janeiro 91
- Financial services firms in Rio de Janeiro 91
- Multinational companies in Rio de Janeiro 80
- Healthcare providers in Rio de Janeiro 71
- Companies with a mobile app in Rio de Janeiro 68
- Retail companies in Rio de Janeiro 68
- E-commerce companies in Rio de Janeiro 62
- Public sector organisations in Rio de Janeiro 60
- Manufacturers in Rio de Janeiro 55
- Professional services firms in Rio de Janeiro 53
- Financial Services companies in Rio de Janeiro 52
- Energy companies in Rio de Janeiro 50
- Hospitals and Health Care companies in Rio de Janeiro 44
- Franchise networks in Rio de Janeiro 42
- Logistics companies in Rio de Janeiro 37
- Corporate groups and holding companies in Rio de Janeiro 36
- IT Services and IT Consulting companies in Rio de Janeiro 34
- Hotel and hospitality groups in Rio de Janeiro 31
- Oil and Gas companies in Rio de Janeiro 31
- Wellness and Fitness Services companies in Rio de Janeiro 31
- Investment Management companies in Rio de Janeiro 29
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 de Janeiro State 43
- Companies with in-house R&D in Rio Grande do Sul 42
- Companies with in-house R&D in São Paulo 145