| # | Company | Employees |
|---|---|---|
| 1 | 6,905 | |
| 2 | 6,367 | |
| 3 | 4,950 | |
| 4 |
Instituto Superior Técnicotecnico.ulisboa.pt
Leading institution in Portugal for Engineering, Science, Technology, and Architecture education Focused on research, innovation, and preparing students for the challenges of the 21st century |
4,432 |
| 5 |
Faculdade de Engenharia da Universidade do Portoup.pt
Leading institution with international reputation, excelling in research and teaching, and at the forefront of engineering universities since 1837. |
4,379 |
| 6 |
Universidade do Portoup.pt
Leading Portuguese institution offering high quality education and research, fostering innovation, entrepreneurial spirit, and social development, with a goal to become a top global university |
4,298 |
| 7 |
Exército Portuguêsexercito.pt
A credible and modern organization dedicated to defending the country, participating in international missions, and improving the quality of life for populations |
3,898 |
| 8 |
Universidade Nova de Lisboaunl.pt
A renowned public institution in Lisbon offering higher education and research, known for innovation, cultural contributions, and international partnerships |
3,387 |
| 9 |
Santa Casa da Misericórdia de Lisboascml.pt
A prestigious institution in Portugal with over five centuries of existence, dedicated to supporting the less fortunate and promoting a more compassionate society |
3,349 |
| 10 |
Hospital de Santa Mariamin-saude.pt
The company is a healthcare institution that provides medical care, education, research, and innovation to ensure universal access and quality services |
3,111 |
| 11 |
Universidade de Coimbrauc.pt
Portuguese public higher education institution, providing education, training, and research, with a rich heritage and global recognition in sustainable development. |
2,988 |
| 12 |
ULS São Joãoportal-ulssjoao.min-saude.pt
Providing specialized medical care, surgical services, and diagnostic support while conducting clinical research and medical training as a primary national reference hospital center. |
2,975 |
| 13 |
Exército Portuguêsexercito.pt
The company is a credible and modern army, focused on defense and contributing to national security, international missions, and civil protection |
2,620 |
| 14 |
Polícia de Segurança Públicapsp.pt
A uniformed and armed security force in Portugal, established in 1867, focused on public service and administrative autonomy Visit wwwpsppt for more information |
2,450 |
| 15 |
Força Aérea Portuguesa | Portuguese Air Forceemfa.pt
Military branch of the Portuguese Armed Forces, specializing in air defense of the Republic |
2,424 |
| 16 |
GNR - Guarda Nacional Republicanagnr.pt
The company is a military nature security force ensuring democracy, internal security, citizens' rights, and collaborating in national defense policy |
2,414 |
| 17 | 2,332 | |
| 18 |
Unidade Local de Saúde São Joséulssjose.min-saude.pt
A healthcare organization resulting from the merger of multiple health institutions, providing hospital and primary care services to a large population with a focus on acute and chronic disease management, home care, and research |
2,270 |
| 19 | 2,205 | |
| 20 |
University of Lisbonulisboa.pt
A prestigious university in Lisbon offering a wide range of programs with high-quality teachers, fostering academic success and career opportunities for students |
2,203 |
| 21 |
University of Macauum.edu.mo
An international public university in Macao offering whole-person education with a multicultural campus, faculty from around the world, and global rankings |
1,956 |
| 22 |
Iscte - Instituto Universitário de Lisboaiscte-iul.pt
A public university focusing on teaching, research, and community service to educate specialists for sustainable development at national and global levels |
1,952 |
| 23 |
Unidade Local de Saúde Gaia e Espinholinktr.ee
The company aims to be a leading hospital in the healthcare system, focusing on efficiency, responsibility, sustainability, and innovation Their mission is to improve population health by providing differentiated care while promoting education and research |
1,911 |
| 24 |
Banco de Portugalbportugal.pt
Central bank of Portugal focused on maintaining price stability and financial system stability, operating within the Eurosystem and European Central Banks framework |
1,867 |
| 25 |
ULS Santo Antónioulssa.pt
A healthcare organization formed by merging multiple hospitals and medical centers to provide comprehensive medical services in Portugal |
1,758 |
| 26 |
Universidade do Algarveualg.pt
Portuguese public higher education institution offering diverse courses across multiple campuses, known for its international student body and research activities. |
1,711 |
| 27 |
ULS Santa Mariaulssm.min-saude.pt
A healthcare company in Lisbon and Mafra, Portugal, comprising two reference hospitals, over twenty primary care units, and 7,000+ professionals serving 345,000+ patients |
1,658 |
| 28 |
Instituto Superior de Engenharia do Portoisep.ipp.pt
ISEP is a successful Portuguese institution dedicated to teaching and innovation in engineering, specializing in training creative and entrepreneurial engineering professionals since 1852 |
1,647 |
| 29 |
ULS Almada-Seixalulsas.min-saude.pt
A healthcare facility serving a population of 340,000, offering a range of specialized services with 545 beds and a staff of 2,500 employees |
1,608 |
| 30 |
Centro Hospitalar e Universitário de Coimbra (CHUC)chuc.min-saude.pt
A leading Portuguese hospital and research center offering high-quality care, education, and innovation in various medical specialties |
1,603 |
| 31 |
Universidade de Trás-os-Montes e Alto Douroutad.pt
A public university in Vila Real, Portugal, known for teaching, research, and regional development since its establishment in 1973 |
1,603 |
| 32 |
Unidade Local de Saúde de Amadora/Sintrahff.min-saude.pt
The hospital provides specialized healthcare services to the population of Amadora and Sintra, including medical, surgical, maternity, and pediatric emergency care |
1,582 |
| 33 |
CP - Comboios de Portugal, EPEcp.pt
A 100% state-owned public entity in Portugal, responsible for economic development and social cohesion through efficient commercial operations in land transportation |
1,496 |
| 34 |
Universidade da Beira Interiorubi.pt
A Portuguese higher education institution with a diverse student body, strong academic programs, research facilities, and connections to society and businesses |
1,381 |
| 35 |
Polytechnic of Leiriaipleiria.pt
A public Portuguese institution of higher education offering modern facilities, support services, and research activities in various fields for students |
1,372 |
| 36 |
Infraestruturas de Portugalinfraestruturasdeportugal.pt
Leading a group of companies providing engineering, telecommunications, and real estate services, focusing on mobility and accessibility infrastructure management with high performance standards |
1,363 |
| 37 |
Instituto Português de Oncologia do Porto (IPO-Porto)ipoporto.pt
The company provides timely patient-centered healthcare, prevention, research, education, and training in the field of oncology with a focus on quality, humanism, and efficiency |
1,305 |
| 38 |
ULS Bragahospitaldebraga.pt
A public hospital in Portugal with up to 704 beds, providing high-quality healthcare services to 12 million people with multidisciplinary teams and top-notch technology |
1,292 |
| 39 |
Faculdade de Ciências e Tecnologia da Universidade NOVA de Lisboaunl.pt
A young, multicultural school in Portugal, offering high-quality education and outstanding research in science and engineering for individual and societal development. |
1,266 |
| 40 |
Instituto da Segurança Socialseg-social.pt
Providing efficient social security services to ensure the protection and social inclusion of individuals, based on trust, ethics, innovation, and solidarity |
1,183 |
| 41 | 1,174 | |
| 42 |
Instituto Politécnico de Bragançaportal3.ipb.pt
A public institution offering a wide range of higher education programs in various fields, focusing on technical-scientific knowledge and professional development |
1,112 |
| 43 |
Hospital Beatriz Ângelohbeatrizangelo.pt
A public hospital serving a population of approximately 226,072 residents in the regions of Odivelas and Loures, providing integrated healthcare services |
1,060 |
| 44 |
ARSLVTmin-saude.pt
An organization with legal autonomy ensuring quality healthcare access, resource distribution, support, and performance evaluation in a specific geographical area |
1,021 |
| 45 |
SESARAMsesaram.pt
Leading health institution providing safe, quality, and innovative care to residents and visitors in the Madeira Autonomous Region through various healthcare facilities |
1,015 |
| 46 |
ULS de Coimbrachuc.min-saude.pt
A healthcare organization in Coimbra, Portugal, providing a wide range of healthcare services including public health, primary care, rehabilitation, and palliative care |
964 |
| 47 |
Faculdade de Medicina da Universidade de Lisboamedicina.ulisboa.pt
A medical school integrated within the University of Lisbon, providing training for physicians, conducting research in medicine and biomedical sciences |
940 |
| 48 |
University of Coimbrauc.pt
A renowned institution in Portugal, offering high-quality education and conducting advanced research across various fields, with a global reputation for excellence |
930 |
| 49 |
IPOLisboaipolisboa.min-saude.pt
A leading oncology hospital in Portugal offering specialized and differentiated cancer care, with national recognition, high quality standards, and a humanistic approach |
925 |
| 50 |
ULS Lisboa Ocidentalulslo.min-saude.pt
A healthcare group consisting of 3 hospitals in western Lisbon, providing health care services to the community in the area |
900 |
| 51 | 884 | |
| 52 |
Faculdade de Ciências da Universidade de Lisboaciencias.ulisboa.pt
The Faculty of Sciences at Universidade de Lisboa offers high-quality scientific education, research, and collaboration opportunities, producing professionals for the global market |
858 |
| 53 |
Faculty of Veterinary Medicineutl.pt
A prestigious institution in Portugal, offering veterinary education since 1830, emphasizing academic excellence, scientific progress, community service, and lifelong learning |
845 |
| 54 |
Centro Hospitalar Universitário do Algarvechualgarve.min-saude.pt
A merged healthcare institution in the Algarve region with a wide range of medical services and facilities, including rehabilitation, aiming for level II differentiation |
842 |
| 55 |
Unidade Local de Saúde de Matosinhosulsm.min-saude.pt
Integrated public health institution providing primary, hospital, and long-term care with a focus on excellence, humanity, and innovation in serving the community |
808 |
| 56 |
Nigerian Maritime Administration and Safety Agencynimasa.gov.ng
The company is dedicated to implementing global best practices for maritime services in Nigeria |
797 |
| 57 |
Serviço de Saúde da Região Autónoma da Madeira, E.P.E. (SESARAM, E.P.E.)sesaram.pt
A government-held organization in Madeira provides integrated healthcare services to the island's population, focusing on public health promotion and clinical literacy |
797 |
| 58 |
EPAL – Empresa Portuguesa das Águas Livres, SAepal.pt
The company is a Portuguese water management company, focusing on the comprehensive management of the urban water cycle worldwide |
785 |
| 59 |
Faculdade de Medicina da Universidade do Portosigarra.up.pt
An institution founded in 1911, focused on education, research, and healthcare improvement in the fields of Medicine, Health Sciences, and Human Biology |
782 |
| 60 |
Instituto Politécnico do Cávado e do Aveipca.pt
Public higher education institution offering various undergraduate and master's degrees, technical courses, and non-degree programs in multiple formats with a focus on quality education |
776 |
| 61 |
Universidade dos Açoresuac.pt
A public university based in the Azores, providing educational opportunities and research initiatives for students in the region |
775 |
| 62 |
NAV PORTUGALnav.pt
The company is the air navigation service provider in Portugal, ensuring safety in the airspace over Portugal and the Atlantic Ocean |
770 |
| 63 |
Escola Secundária de Moura
A secondary school located in Moura, providing education and support for students in their academic journey |
751 |
| 64 |
Unidade Local de Saúde da Região de Leiriaulsrl.min-saude.pt
Healthcare provider in the Leiria region with a population of 400,000, encompassing multiple health centers, hospitals, and care institutions with 3,400 professionals |
738 |
| 65 |
Unidade Local de Saúde Alto Avehospitaldeguimaraes.min-saude.pt
Official account representing a local healthcare unit providing services in the Alto Ave region |
736 |
| 66 |
Universidade Abertaportal.uab.pt
Established in 1988, this institution is Portugal's only public distance learning university, offering higher education and lifelong learning courses worldwide through advanced elearning technologies |
733 |
| 67 |
Polytechnic Institute of Setúbalips.pt
Higher education institution offering a variety of courses in engineering, management, social sciences, education, sports, and healthcare with a focus on student growth and innovation |
708 |
| 68 |
Metropolitano de Lisboametrolisboa.pt
A public transportation service in the Lisbon Metropolitan Area focusing on customer-oriented management, sustainability, and innovation to improve quality of life |
695 |
| 69 |
Centro Hospitalar de Setúbalulsa.min-saude.pt
Provides public hospital care services, focusing on patient well-being, health promotion, disease prevention, treatment, and rehabilitation within the Setúbal region. |
694 |
| 70 |
Instituto Politécnico do Portoipp.pt
The company offers a wide range of educational programs in eight areas of study through its eight schools located across three campuses |
660 |
| 71 |
Hospital de Cascaishospitaldecascais.pt
A public hospital managed by a health group, offering innovative healthcare services focused on improving community health and well-being |
649 |
| 72 |
Hospital Pedro Hispanoulsm.min-saude.pt
A pioneer in integrating healthcare, academia, and innovation, focusing on holistic and personalized health promotion while prioritizing sustainability and quality care |
644 |
| 73 |
Instituto Informática,I.P.seg-social.pt
The organization defines and proposes information technology policies and strategies, ensuring planning, design, implementation, and evaluation of digitization and technological updates in MTSSS |
617 |
| 74 |
SPMS, EPE - Serviços Partilhados do Ministério da Saúdespms.min-saude.pt
A public entity providing shared services in purchasing, logistics, finance, HR, and IT to healthcare organizations in Portugal's National Health Service |
615 |
| 75 |
ULS Estuário do Tejohospitalvilafrancadexira.pt
The company is a healthcare organization focused on promoting health, preventing disease, and providing quality healthcare services to the population within its jurisdiction |
600 |
| 76 |
INPIinpi.justica.gov.pt
The company provides patent protection, trademark registration, and design grants to promote industrial property and innovation investment in Portugal |
598 |
| 77 |
Faculdade de Direito da Universidade de Lisboafd.ulisboa.pt
A prestigious law school within the University of Lisbon, offering interdisciplinary education, community service, and a modern learning environment |
593 |
| 78 |
Ordem dos Engenheirosordemdosengenheiros.pt
The company is a professional association in Portugal representing engineers, controlling access to the profession, promoting engineering, and upholding professional ethics |
583 |
| 79 |
Instituto Superior de Contabilidade e Administração do Portoiscap.ipp.pt
Established in 1886, ISCAP offers education in accounting, administration, marketing, digital marketing, international trade, e-commerce, business communication, consulting, and translation |
571 |
| 80 |
Instituto Politécnico de Viana do Casteloipvc.pt
The Institute offers high-quality education, research, and collaboration with the local community in various fields through its six Schools |
570 |
| 81 |
INCM Imprensa Nacional - Casa da Moedaincm.pt
Specializes in producing secure identity documents, incorporating electronic components and services, authenticating precious metals, and publishing cultural works |
570 |
| 82 |
Universidade da Madeirauma.pt
The organization focuses on providing official pages and digital services, accessible at the link provided Visit for more information |
559 |
| 83 |
Unidade Local de Saúde do Tâmega e Sousaulsts.min-saude.pt
The company provides healthcare services to its geographical area, focusing on patient satisfaction, research, education, and sustainability within the national healthcare system |
558 |
| 84 |
ISEG - Lisbon School of Economics & Managementiseg.ulisboa.pt
Established in 1911, ISEG is a prominent research-oriented institution in Portugal offering education in business and economics at various levels |
555 |
| 85 |
Unidade Local de Saúde do Médio Tejoulsmt.min-saude.pt
Integrated healthcare services provider in the Médio Tejo region, combining hospitals, primary care centers, and healthcare services in Vila de Rei municipality |
554 |
| 86 |
Escola Superior de Saúde do Politécnico do Portoess.ipp.pt
A leading institution in Health Sciences education and research, promoting innovation to enhance healthcare professionals' skills and contribute to healthier societies |
551 |
| 87 | 510 | |
| 88 |
Docapesca - Portos e Lotas, S.A.docapesca.pt
A state-owned company in Portugal manages fish auctions and supports the fishing sector from Vila Praia de Âncora to Vila Real de Santo António |
198 |
| 89 |
Estamo, S.A.estamo.pt
State-owned company managing non-strategic real estate assets purchased from the State and public entities, specializing in sale, lease, and development Managing over one billion euros in assets |
35 |
| 90 | 17 | |
| 91 |
Museu Carlos Machadomuseucarlosmachado.azores.gov.pt
A museum that showcases art and cultural exhibits, providing an enriching and educational experience for visitors |
14 |
| 92 |
SMAS_VFXirasmas-vfxira.pt
Ensure public water supply and basic sanitation services to the population of Vila Franca de Xira through an optimized management model focusing on human and technological resources |
8 |
| 93 |
Gondomar Coração de Ouro, EMgco.pt
The company specializes in promoting and managing a multi-purpose pavilion, organizing high quality events for specific groups and the general population |
5 |
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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 Portugal
- The largest companies in Portugal 1,547
- Critical infrastructure operators in Portugal 111
- Higher Education companies in Portugal 108
- IT Services and IT Consulting companies in Portugal 96
- Retail chains in Portugal 94
- Software Development companies in Portugal 81
- Financial services firms in Portugal 74
- Hospitals and Health Care companies in Portugal 69
- IT services companies in Portugal 68
- Education providers in Portugal 67
- Manufacturers in Portugal 56
- SaaS companies in Portugal 56
- Healthcare providers in Portugal 55
- Government Administration companies in Portugal 52
- Consumer goods companies in Portugal 49
- Construction companies in Portugal 44
- Financial Services companies in Portugal 41
- Retail companies in Portugal 41
- Research institutes in Portugal 41
- Food and Beverage Services companies in Portugal 40
- Hospitality companies in Portugal 33
- Motor Vehicle Manufacturing companies in Portugal 31
- Real Estate companies in Portugal 31
- Food and beverage companies in Portugal 30