These are large operators of critical infrastructure in Antioquia, Colombia, mostly based in Medellín. They are primarily established companies in utilities, financial services, and healthcare.
Among them, Bancolombia is a Latin American financial group, Seguros SURA provides insurance and social security solutions, and Tigo Colombia is a telecommunications service provider. Empresas Públicas de Medellín - EPM offers public services in energy, water, and gas, while Grupo SURA is an investment manager. A common pattern is the strong presence of companies providing essential public services and financial support, concentrated in Medellín.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Bancolombiabancolombia.com
Latin American financial group fostering lasting relationships based on trust, closeness, respect, inclusion, and warmth Providing agile, simple, and impeccable solutions for life projects |
21,381 | |||
| 2 |
Seguros SURAsuramericana.com
Provides insurance and social security solutions through various brands, supporting Latin Americans with protection products and long-term client relationships. |
14,706 | |||
| 3 |
Tigo Colombiatigo.co
A leading telecommunications service provider in Colombia, connecting citizens through innovative digital solutions and promoting sustainability for national development |
6,417 | |||
| 4 |
Empresas Públicas de Medellín - EPMepm.com.co
A multilatin business group providing public services in energy, water, sanitation, and natural gas while promoting innovation and renewable energies |
5,661 | |||
| 5 |
Grupo SURAgruposura.com
Manages investments, focusing on Latin American financial services with insurance, pensions, savings, and banking through subsidiaries and a major stake in Bancolombia. |
3,307 | |||
| 6 |
Interaseo S.A.S. E.S.P.linktr.ee
Privately-owned company offering public services in waste, water, energy, and facility management since 1996 Committed to sustainable evolution with communities |
2,442 | |||
| 7 |
EPMgoogle.com
A provider of public utility services, including energy, water, and telecommunications, with a focus on information and communication technologies |
2,075 | |||
| 8 |
Celsia Energíacelsia.com
Manage energy infrastructure and assets, provide renewable and thermal energy generation, transmission, distribution, and commercialization across Colombia, Peru, and Central America. |
1,735 | |||
| 9 |
Hospital Pablo Tobón Uribehptu.org
Committed to quality and safety in services since 1970, leading in excellence with awards for family-friendly practices and top rankings in Latin America |
1,377 | |||
| 10 |
Metro de Medellínmetrodemedellin.gov.co
The organization operates a mass transit system in Medellín, promoting sustainable mobility with clean energy and enhancing quality of life for residents |
1,324 | |||
| 11 |
San Vicente Fundaciónsanvicentefundacion.com
A healthcare network offering high complexity services including a university hospital, a children's hospital, specialized centers, diagnostic support, research, and industrial activities |
1,300 | |||
| 12 |
Hospital Alma Máter de Antioquiaalmamater.hospital
We are a health service provider affiliated with the University of Antioquia, with 4 branches in Medellín, Barranquilla, San Andrés Islas, and Apartadó |
1,006 | |||
| 13 |
SURA Asset Managementsura-am.com
Leading asset management specialized in retirement savings and investment in Latin America, offering a wide range of financial products and services |
898 | |||
| 14 |
ISA ENERGÍA en Colombiaisaenergia.com
ISA INTERCOLOMBIA is a mixed public utility dedicated to high-voltage electricity transmission in Colombia, managing, operating, and maintaining ISA's electric assets nationwide |
897 | |||
| 15 |
Hospital General de Medellínhgm.gov.co
A leading public healthcare institution in Colombia and Latin America, providing high-quality medical services, cutting-edge surgical technology, and sustainable practices |
837 | |||
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 |
ISAGEN S.Aisagen.com.co
A private energy generator and marketer with 19 plants totaling over 3,000 MW, advancing in renewable energy portfolio development using water, wind, and solar sources |
806 | |||
| 17 |
IPS PROMEDAN S.Apromedanips.co
Health services network with 19 years of experience in Antioquia region, operating clinics with hospital beds, operating rooms, maternity rooms, and dental clinics |
766 | |||
| 18 |
ISA Interconexión Eléctrica S.A. E.S.P.isa.co
A multi-Latin organization operating in Electric Power, Roads, Telecommunications, and ICT sectors, connecting millions of people across Latin America |
760 | |||
| 19 |
Clínica El Rosarioclinicaelrosario.com
A Colombian healthcare facility providing hospital services focused on promoting health and wellness in the community |
704 | |||
| 20 |
Colmédicos IPS S.A.Scolmedicos.com
Specialized in occupational health, providing preventive medicine and occupational health services to businesses and individuals with quality, ethics, and reliability |
668 | |||
| 21 |
Clínica Las Vegasclinicalasvegas.com
Private institution providing high complexity health services with 20 years of experience Committed to patient well-being, safety, and health with quality care and cutting-edge technology |
644 | |||
| 22 |
Confiar Coopconfiar.coop
A financial cooperative providing savings, credit, social programs, and cultural services for its members, promoting solidarity, sustainability, and community development |
571 | |||
| 23 |
Clínica Medellínclinicamedellin.com
Medellín-based healthcare facility providing hospital and health services located on Carrera in Colombia |
557 | |||
| 24 |
InterNexa S.Ainternexa.com
Specializing in telecommunications services for over 20 years, we provide digital solutions and connectivity solutions in multiple countries, prioritizing efficiency and productivity |
515 | |||
| 25 |
Coltefinancieracoltefinanciera.com.co
A reputable financial services provider in Colombia with over 41 years of experience, offering personalized and high-quality financial services to clients |
400 | |||
| 26 |
Clínica Antioquiaclinicantioquia.com.co
We are dedicated to providing quality, humanized, safe, and risk-managed healthcare services, prioritizing user well-being and customer trust |
358 | |||
| 27 |
Cooperativa Financiera Cotrafacotrafa.com.co
We collaborate to make your life easier and turn it into unforgettable moments |
335 | |||
| 28 |
Somos Internetsomosinternet.co
A technology company challenging the status quo by providing faster, more stable, and affordable internet access with FiberWave technology in Latin America |
330 | |||
| 29 |
cfa Cooperativa Financieracfa.com.co
Providing financial products and services to promote economic growth, inclusion, and community development for our members and savers |
266 | |||
| 30 |
Conhydra S.A. E.S.Pconhydra.com
Specializing in water management solutions, they provide services ranging from consultation and supervision to construction and operation of water and sanitation systems in Latin America and the Caribbean |
202 | |||
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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 11, 2026.
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