| # | Company | Employees |
|---|---|---|
| 1 |
Rede D'Orrededorsaoluiz.com.br
The largest integrated healthcare network in Brazil, with hospitals, oncology clinics, blood banks, and research institutes across multiple states Follow on social media for updates |
42,515 |
| 2 |
Sesc - Departamento Nacionalsesc.com.br
A nonprofit institution providing education, health, culture, leisure, and assistance services to workers and society nationwide, promoting well-being and quality of life |
10,771 |
| 3 | 10,067 | |
| 4 |
Universidade Federal do Rio de Janeiroufrj.br
Higher education institution empowering individuals to excel in professions, value diverse knowledge, engage as active citizens, and drive societal transformation towards justice and democracy |
9,556 |
| 5 |
RioSaúderiosaude.prefeitura.rio
Public health organization in Rio de Janeiro dedicated to serving the local population with medical care and health services 🏥👩🏽⚕️🩺 |
4,345 |
| 6 |
Drogaria Venanciodrogariavenancio.abler.com.br
Pioneering drugstore offering a unique customer experience with 60 locations, healthcare products, online sales, wholesale services, and social projects for community health |
4,204 |
| 7 |
Unimed-Riounimedrio.com.br
Healthcare organization in Brazil with over 1 million customers, leading the market in Rio de Janeiro Committed to social responsibility and employee development |
3,901 |
| 8 |
DaVita Tratamento Renaldavita.com.br
A global leader in providing renal care through innovative practices, improving health, quality of life, and access to treatment for patients worldwide |
3,823 |
| 9 |
Fiocruzfiocruz.br
Promoting health and social development, generating and disseminating scientific and technological knowledge, and promoting citizenship through healthcare research and technology |
3,625 |
| 10 |
Orthoprideorthopride.com.br
A leading orthodontic franchise in Brazil with over 200 locations and 200,000 active patients Offers top technology, training, and profitable business models Partnered with sports stars for national visibility |
3,031 |
| 11 |
Drogarias Pachecodrogariaspacheco.com.br
Leading pharmacy chain with over 450 branches, 123 years of experience, and a commitment to quality, ethics, and exceptional customer service |
2,890 |
| 12 |
Hospital São Vicente de Paulohsvp.org.br
A healthcare provider that achieved accreditation from JCI multiple times, confirming the quality and safety of its services |
2,499 |
| 13 |
Rede Hospital Casaredehospitalcasa.com.br
Leading independent medical hospital operator in Rio de Janeiro, providing a wide range of specialties, 11 emergency rooms, 44 surgery rooms, and a focus on humanized patient care |
2,210 |
| 14 |
Assim Saúdeassim.com.br
A healthcare operator in Rio de Janeiro with a vast network of hospitals and clinics, offering quality medical services with modern technology and skilled professionals |
2,149 |
| 15 |
Hospital São Lucas Copacabanasaolucascopacabana.com.br
A longstanding hospital in Rio de Janeiro with a renowned Emergency Department, state-of-the-art surgical center, robotic technology, and a large team providing thousands of surgeries and medical services annually |
2,004 |
| 16 |
Sesc RJsescrio.org.br
A non-profit organization focused on promoting social well-being and quality of life through socioeducational initiatives for workers and their communities |
1,952 |
| 17 |
Casa de Saúde São Joséredesantacatarina.org.br
A healthcare institution established by dedicated sisters in 1923, providing medical care across various departments with accreditations from ONA III and Canadian organizations |
1,824 |
| 18 |
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 |
| 19 |
Rede D'Or Starrededorsaoluiz.com.br
Providing a unique and upscale healthcare experience with cutting-edge technology for diagnosis and treatment, focusing on comfort, hospitality, and humanized care |
1,246 |
| 20 |
Instituto Gnosisinstitutognosis.org.br
Health services provider focused on medical, hospital, and diagnostic therapy with a commitment to excellence in healthcare management and development |
1,216 |
| 21 |
Beep Saúdebeepsaude.com.br
A digital Brazilian company providing top-notch healthcare services nationwide with home appointments for lab tests and vaccinations, simplifying people's lives #OndaVerde |
1,143 |
| 22 |
UNIRIO
A federal institution of higher education in Rio de Janeiro offering undergraduate, graduate, and extension programs in various academic fields |
1,137 |
| 23 |
Grupo GSHgrupogsh.com.br
Specialized network in high-complexity hemotherapy and cellular therapy, with a focus on patient care, quality, and expertise in transfusional medicine nationwide |
1,046 |
| 24 |
Oncologia D'Orrededorsaoluiz.com.br
Specializing in oncology, we offer superior cancer diagnosis and treatment across Brazil with a network of over 40 units and 360+ oncologists |
1,004 |
| 25 |
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 |
| 26 |
Hospital Municipal Souza Aguiarfacebook.com
Medical practice located in Rio De Janeiro, Brazil, offering services at Hospital Municipal Souza Aguiar in the field of healthcare |
834 |
| 27 |
Leve Saúdelevesaude.com.br
Healthtech operator in Rio de Janeiro for people over 45, providing quality healthcare at affordable prices, emphasizing Digital Health and personalized care |
797 |
| 28 |
Unimed Ferjunimed.coop.br
Founded in 1972, this organization in Rio de Janeiro supports 18 local healthcare cooperatives, focusing on people and providing services to the community |
773 |
| 29 |
Hospital Municipal Ronaldo Gazolla
This medical center is a key part of the city's healthcare system, with a large outpatient clinic, numerous specialties, and a vast number of hospital beds |
706 |
| 30 |
Apaixonados por Quatro Patasapaixonadosporquatropatas.com.br
A leading franchise network of veterinary clinics in Brazil, founded to rescue and care for animals, now expanding nationwide with affordable quality veterinary services |
691 |
| 31 |
Grupo Ensegenseg.com.br
The company operates in fire systems, workplace safety, pre-hospital care, construction, and shrimp cultivation, ensuring safety and quality in industrial, commercial, and agricultural sectors |
680 |
| 32 |
Hospital Copa Starrededorsaoluiz.com.br
A cutting-edge healthcare facility in the heart of Rio de Janeiro's Copacabana, providing excellence in medical assistance and hospital services nationwide |
609 |
| 33 |
Grupo Perinatalrededorsaoluiz.com.br
Specialized healthcare institution focusing on obstetrics, high-risk pregnancy, fetal medicine, neonatology, and diagnostic services for women and mothers |
605 |
| 34 |
Instituto Nacional de Cardiologia (Instituto Nacional de Cardiologia Laranjeiras)inc.saude.gov.br
Specializing in high-complexity treatment for cardiac diseases, the institute stands out for hemodynamic procedures, complex heart surgeries, transplants, and professional training in the healthcare field |
592 |
| 35 |
Hospital Naval Marcílio Dias
Medical practice located in Rio De Janeiro, Brazil, providing services at Hospital Naval Marcílio Dias on R CÉSAR ZAMA 185 |
582 |
| 36 |
HEMORIOhemorio.rj.gov.br
A blood center in Rio de Janeiro supplying blood and its products to around 180 healthcare facilities |
579 |
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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.
More company lists in Rio de Janeiro
- The largest companies in Rio de Janeiro 997
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- Education providers in Rio de Janeiro 54
- Public sector organisations in Rio de Janeiro 45
- Hospitals and Health Care companies in Rio de Janeiro 44
- Energy companies in Rio de Janeiro 36
- IT Services and IT Consulting companies in Rio de Janeiro 34
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The same list elsewhere in Brazil
- Healthcare providers in Brazil 617
- Healthcare providers in São Paulo State 240
- Healthcare providers in Minas Gerais 63
- Healthcare providers in Rio de Janeiro State 54
- Healthcare providers in Paraná 52
- Healthcare providers in Rio Grande do Sul 38
- Healthcare providers in Santa Catarina 29
- Healthcare providers in São Paulo 142
- Healthcare providers in Belo Horizonte 34