# 27 leading critical infrastructure operators in Medellín
Tamtam tracks 27 critical infrastructure operators headquartered in Medellín. This list ranks all of them by number of employees on LinkedIn, led by Bancolombia, Seguros SURA and Tigo Colombia. Their median headcount is 837. Half of them were founded in 1996 or later.
These Medellín-based companies are significant operators in critical infrastructure, spanning financial services, utilities, telecommunications, and healthcare. The companies listed are generally large enterprises, with the largest, Bancolombia, employing over 21,000 people. Other notable firms include Seguros SURA, providing insurance and social security, and Empresas Públicas de Medellín (EPM), a multilatin group in public services.
The list reveals a strong presence of both long-established institutions and entities founded in the late 20th and early 21st centuries. For instance, Bancolombia dates back to 1875, while Grupo SURA, an investment manager, was founded in 1997. This blend of heritage and more recent establishment indicates a continuous evolution of critical infrastructure provision in the region.
🇨🇴 Medellín · 27 companies · Updated Nov 11, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Bancolombia](https://www.tamtam.ai/c/bancolombia) (bancolombia.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 | Banking | 🇨🇴 Medellín | 21,381 | 1875 |
| 2 | [Seguros SURA](https://www.tamtam.ai/c/seguros-sura) (suramericana.com)
Provides insurance and social security solutions through various brands, supporting Latin Americans with protection products and long-term client relationships. | Insurance | 🇨🇴 Medellín | 14,706 | |
| 3 | [Tigo Colombia](https://www.tamtam.ai/c/tigo-colombia) (tigo.co)
A leading telecommunications service provider in Colombia, connecting citizens through innovative digital solutions and promoting sustainability for national development | Telecommunications | 🇨🇴 Medellín | 6,417 | |
| 4 | [Empresas Públicas de Medellín - EPM](https://www.tamtam.ai/c/empresas-publicas-de-medellin-epm) (epm.com.co)
A multilatin business group providing public services in energy, water, sanitation, and natural gas while promoting innovation and renewable energies | Utilities | 🇨🇴 Medellín | 5,661 | 1955 |
| 5 | [Grupo SURA](https://www.tamtam.ai/c/grupo-sura) (gruposura.com)
Manages investments, focusing on Latin American financial services with insurance, pensions, savings, and banking through subsidiaries and a major stake in Bancolombia. | Financial Services | 🇨🇴 Medellín | 3,307 | 1997 |
| 6 | [Interaseo S.A.S. E.S.P.](https://www.tamtam.ai/c/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 | Utilities | 🇨🇴 Medellín | 2,442 | 1996 |
| 7 | [EPM](https://www.tamtam.ai/c/epm-medellin) (google.com)
A provider of public utility services, including energy, water, and telecommunications, with a focus on information and communication technologies | Telecommunications | 🇨🇴 Medellín | 2,075 | 2005 |
| 8 | [Celsia Energía](https://www.tamtam.ai/c/celsia-energia) (celsia.com)
Manage energy infrastructure and assets, provide renewable and thermal energy generation, transmission, distribution, and commercialization across Colombia, Peru, and Central America. | Utilities | 🇨🇴 Medellín | 1,735 | 2012 |
| 9 | [Hospital Pablo Tobón Uribe](https://www.tamtam.ai/c/hospital-pablo-tobon-uribe) (hptu.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 | Hospitals and Health Care | 🇨🇴 Medellín | 1,377 | 1970 |
| 10 | [San Vicente Fundación](https://www.tamtam.ai/c/san-vicente-fundacion) (sanvicentefundacion.com)
A healthcare network offering high complexity services including a university hospital, a children's hospital, specialized centers, diagnostic support, research, and industrial activities | Public Health | 🇨🇴 Medellín | 1,300 | 1913 |
| 11 | [Hospital Alma Máter de Antioquia](https://www.tamtam.ai/c/hospital-alma-mater-de-antioquia) (almamater.hospital)
We are a health service provider affiliated with the University of Antioquia, with 4 branches in Medellín, Barranquilla, San Andrés Islas, and Apartadó | Hospitals and Health Care | 🇨🇴 Medellín | 1,006 | 1998 |
| 12 | [SURA Asset Management](https://www.tamtam.ai/c/sura-asset-management) (sura-am.com)
Leading asset management specialized in retirement savings and investment in Latin America, offering a wide range of financial products and services | Financial Services | 🇨🇴 Medellín | 898 | 2011 |
| 13 | [ISA ENERGÍA en Colombia](https://www.tamtam.ai/c/isa-energia-en-colombia) (isaenergia.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 | Utilities | 🇨🇴 Medellín | 897 | 2013 |
| 14 | [Hospital General de Medellín](https://www.tamtam.ai/c/hospital-general-de-medellin) (hgm.gov.co)
A leading public healthcare institution in Colombia and Latin America, providing high-quality medical services, cutting-edge surgical technology, and sustainable practices | Hospitals and Health Care | 🇨🇴 Medellín | 837 | 1942 |
| 15 | [ISAGEN S.A](https://www.tamtam.ai/c/isagen-s-a) (isagen.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 | Renewable Energy Power Generation | 🇨🇴 Medellín | 806 | 1995 |
| 16 | [IPS PROMEDAN S.A](https://www.tamtam.ai/c/ips-promedan-s-a) (promedanips.co)
Health services network with 19 years of experience in Antioquia region, operating clinics with hospital beds, operating rooms, maternity rooms, and dental clinics | Wellness and Fitness Services | 🇨🇴 Medellín | 766 | 2005 |
| 17 | [ISA Interconexión Eléctrica S.A. E.S.P.](https://www.tamtam.ai/c/isa-interconexion-electrica-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 | Utilities | 🇨🇴 Medellín | 760 | |
| 18 | [Clínica El Rosario](https://www.tamtam.ai/c/clinica-el-rosario) (clinicaelrosario.com)
A Colombian healthcare facility providing hospital services focused on promoting health and wellness in the community | Hospitals and Health Care | 🇨🇴 Medellín | 704 | 1959 |
| 19 | [Colmédicos IPS S.A.S](https://www.tamtam.ai/c/colmedicos-ips-s-a-s) (colmedicos.com)
Specialized in occupational health, providing preventive medicine and occupational health services to businesses and individuals with quality, ethics, and reliability | Medical Practices | 🇨🇴 Medellín | 668 | 1988 |
| 20 | [Clínica Las Vegas](https://www.tamtam.ai/c/clinica-las-vegas) (clinicalasvegas.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 | Hospitals and Health Care | 🇨🇴 Medellín | 644 | 1992 |
| 21 | [Confiar Coop](https://www.tamtam.ai/c/confiar-coop) (confiar.coop)
A financial cooperative providing savings, credit, social programs, and cultural services for its members, promoting solidarity, sustainability, and community development | Financial Services | 🇨🇴 Medellín | 571 | 1972 |
| 22 | [Clínica Medellín](https://www.tamtam.ai/c/clinica-medellin) (clinicamedellin.com)
Medellín-based healthcare facility providing hospital and health services located on Carrera in Colombia | Hospitals and Health Care | 🇨🇴 Medellín | 557 | |
| 23 | [InterNexa S.A](https://www.tamtam.ai/c/internexa-s-a) (internexa.com)
Specializing in telecommunications services for over 20 years, we provide digital solutions and connectivity solutions in multiple countries, prioritizing efficiency and productivity | Telecommunications | 🇨🇴 Medellín | 515 | 2000 |
| 24 | [Coltefinanciera](https://www.tamtam.ai/c/coltefinanciera) (coltefinanciera.com.co)
A reputable financial services provider in Colombia with over 41 years of experience, offering personalized and high-quality financial services to clients | Banking | 🇨🇴 Medellín | 400 | 1980 |
| 25 | [Somos Internet](https://www.tamtam.ai/c/somos-internet) (somosinternet.co)
A technology company challenging the status quo by providing faster, more stable, and affordable internet access with FiberWave technology in Latin America | Technology, Information and Internet | 🇨🇴 Medellín | 330 | 2018 |
| 26 | [cfa Cooperativa Financiera](https://www.tamtam.ai/c/cfa-cooperativa-financiera) (cfa.com.co)
Providing financial products and services to promote economic growth, inclusion, and community development for our members and savers | Financial Services | 🇨🇴 Medellín | 266 | 2000 |
| 27 | [Conhydra S.A. E.S.P](https://www.tamtam.ai/c/conhydra-s-a-e-s-p) (conhydra.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 | Environmental Services | 🇨🇴 Medellín | 202 | 1996 |
## 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 11, 2026.
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- [The largest companies in Medellín](https://www.tamtam.ai/l/largest-companies-medellin) (260)
- [Multinational companies in Medellín](https://www.tamtam.ai/l/multinational-companies-medellin) (39)
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- [Education providers in Medellín](https://www.tamtam.ai/l/education-companies-medellin) (27)
## The same list elsewhere in Colombia
- [Critical infrastructure operators in Colombia](https://www.tamtam.ai/l/critical-infrastructure-operators-colombia) (249)
- [Critical infrastructure operators in Cundinamarca](https://www.tamtam.ai/l/critical-infrastructure-operators-cundinamarca) (37)
- [Critical infrastructure operators in Antioquia](https://www.tamtam.ai/l/critical-infrastructure-operators-antioquia) (30)
- [Critical infrastructure operators in Bogotá](https://www.tamtam.ai/l/critical-infrastructure-operators-bogota) (135)
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Source: https://www.tamtam.ai/l/critical-infrastructure-operators-medellin