| # | Company | Employees |
|---|---|---|
| 1 | 6,367 | |
| 2 | 4,950 | |
| 3 |
Câmara Municipal de Lisboalisboa.pt
The Municipal Chamber of Lisbon is responsible for defining and implementing policies to promote development in various areas within the municipality |
2,959 |
| 4 |
AT - Autoridade Tributária e Aduaneiraportaldasfinancas.gov.pt
National entity managing taxes, customs rights, border control for fiscal, economic, societal protection Negotiates international agreements, collaborates with taxpayers, promotes tax compliance, innovation through digital platforms |
2,786 |
| 5 |
Câmara Municipal do Portocm-porto.pt
This organization promotes the well-being and comfort of citizens in Porto by fostering economic and cultural development, competitiveness, and sustainability |
2,097 |
| 6 |
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 |
| 7 |
Câmara Municipal de Cascaiscascais.pt
Manage local municipality with elected president and councilors, oversee public administration, and implement policies for community development. |
1,337 |
| 8 |
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 |
| 9 |
Câmara Municipal de Oeirasoeiras.pt
This organization is a public entity engaged in various activities within the public sector, offering services or products to a wide audience |
1,116 |
| 10 |
Fundação para a Ciência e a Tecnologia (FCT)fct.pt
A Portuguese agency funding science and technology, coordinating public policies, managing national research network, connecting research with industry, and supporting diverse research areas |
903 |
| 11 |
Câmara Municipal de Vila Nova de Gaiacm-gaia.pt
Local government focusing on innovation, digital transformation, transparency, and collaboration to enhance public services and community engagement. |
827 |
| 12 |
Turismo de Portugalturismodeportugal.pt
Promotion and development of national tourism, infrastructure qualification, investment support, human resource training, and regulation of gambling activities. |
781 |
| 13 |
Câmara Municipal de Matosinhoscm-matosinhos.pt
The company takes pride in its Municipal Chamber, attracting tourists, delighting children, and impressing officials with its beauty and grandeur |
742 |
| 14 |
Câmara Municipal de Sintracm-sintra.pt
The organization is responsible for promoting the overall development of the region in various aspects such as health, education, social action, environment, urban planning, and cultural activities |
659 |
| 15 |
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 |
| 16 |
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 |
| 17 |
INPIinpi.justica.gov.pt
The company provides patent protection, trademark registration, and design grants to promote industrial property and innovation investment in Portugal |
598 |
| 18 |
aicep Portugal Globalportugalglobal.pt
Support Portuguese companies expanding abroad and attract foreign investment into Portugal through professional assistance and comprehensive services. |
529 |
| 19 |
Câmara Municipal de Coimbracm-coimbra.pt
Define and implement policies addressing health, education, social action, housing, environment, urban planning, transport, culture, and public safety. |
493 |
| 20 |
SUCH - Serviço de Utilização Comum dos Hospitaissuch.pt
A nonprofit association providing shared healthcare services, supported by the Ministries of Health and Finance, with over 50 years of hospital service experience |
482 |
| 21 |
Segurança Socialseg-social.pt
A government administration based in Portugal, specializing in social security services and located in Caldas de Vizela |
447 |
| 22 | 429 | |
| 23 |
Administração Pública de Portugaldgaep.gov.pt
Portugal's public administration sector overseeing governmental operations and services for its citizens and residents |
424 |
| 24 |
Camões - Instituto da Cooperação e da Língua, I.P.instituto-camoes.pt
The organization is a public institute responsible for proposing and executing Portuguese cooperation policies and promoting the language and culture abroad |
423 |
| 25 |
INFARMED, I.P.infarmed.pt
A public institute under the Ministry of Health in Portugal, responsible for regulating medicines and health products with administrative and financial autonomy |
400 |
| 26 |
Ordem dos Psicólogos Portuguesesordemdospsicologos.pt
Professional organization representing over 18,000 Portuguese psychologists, responsible for professional title and recognition, ensuring adherence to European professional mobility Directive |
380 |
| 27 |
Câmara Municipal de Gondomarcm-gondomar.pt
Discover Gondomar, a place with historical resonances Uncovering ancient roots of human life since prehistory Welcome! |
379 |
| 28 |
ANACOM - Autoridade Nacional de Comunicaçõesanacom.pt
ANACOM is the national regulatory authority in Portugal for communications, ensuring compliance with EU and national legislation while maintaining operational independence |
372 |
| 29 | 370 | |
| 30 |
Instituto dos Registos e do Notariadoirn.justica.gov.pt
A public institute under the Ministry of Justice overseeing registry services for civil identification, citizenship, property, vehicles, companies, and collective entities |
361 |
| 31 |
CCDR NORTE, I.P.ccdr-n.pt
The company is a public institution that focuses on the integrated and sustainable development of the Norte region in Portugal |
355 |
| 32 |
IAPMEI, I.P. - Agência para a Competitividade e Inovaçãoiapmei.pt
A specialized public agency under the Portuguese Ministry of the Economy providing technical and financial support to SMEs for growth and competitiveness |
347 |
| 33 |
Lagos State House of Assemblylagoshouseofassembly.gov.ng
This company is responsible for the legislative functions within the Government of Lagos State |
329 |
| 34 |
Câmara Municipal do Barreirocm-barreiro.pt
Managing the official LinkedIn page of the Municipality of Barreiro, located in the Setúbal District and part of the Lisbon Metropolitan Area |
321 |
| 35 |
ACT - Autoridade para as Condições do Trabalhoportal.act.gov.pt
A government service in Portugal dedicated to promoting and improving working conditions for employees throughout the country |
320 |
| 36 |
Ministry of Justice of Portugalgov.pt
The company is a government department responsible for designing, implementing, and evaluating justice policies as defined by the national assembly and government |
310 |
| 37 |
Famalicãofamalicao.pt
A company located in Famalicão, a vibrant and dynamic city in Portugal, known for its culture, industry, agriculture, and quality of life |
278 |
| 38 |
INMLCF - Instituto Nacional de Medicina Legal e Ciências Forensesinmlcf.justica.gov.pt
A forensic institute specializing in analyzing evidence, providing expert opinions, and conducting research in the field of forensic science |
273 |
| 39 |
Município do Fundãocm-fundao.pt
Fundao municipality in Portugal recognized for providing a prime location to invest, do business, and live, receiving several awards for business environment improvement |
261 |
| 40 |
Comissão de Coordenação e Desenvolvimento Regional do Centro, I. P.ccdrc.pt
The company aims to execute environmental, urban planning, and regional development policies in the Central Region, promoting coordinated actions and supporting local authorities and associations |
213 |
| 41 |
IHRU – Institute for Housing and Urban Rehabilitationihru.pt
The organization focuses on implementing government policies related to housing, urban regeneration, city development, social safeguarding, and cultural/architectural heritage promotion |
193 |
| 42 |
European Union Drugs Agency (EUDA)euda.europa.eu
Leading authority in the EU on illicit drugs, providing scientific evidence and analysis to inform policies and protect citizens from drug-related harms |
193 |
| 43 |
Funchal City Hallcm-funchal.pt
The company, newly inaugurated on World Autism Awareness Day, aims to provide sensory stimulation and reduce anxiety levels for individuals with autism |
186 |
| 44 |
Portuguese Institute of Sport and Youth, IPipdj.gov.pt
National public body responsible for implementing integrated policy for sports and youth in collaboration with public and private organizations |
183 |
| 45 |
Município Ponte de Sorcm-pontedesor.pt
A company located in a serene town between Ribatejo and Alentejo showcasing the rich cultural heritage, historical landmarks, and tranquil surroundings of the region |
175 |
| 46 | 169 | |
| 47 |
Município de Pombalcm-pombal.pt
Local government administration in Pombal, Portugal, manages a township with 60,000+ residents, 17 parishes, a large area, 400 employees, and a significant annual budget |
168 |
| 48 |
Câmara Municipal de Guimarãescmguimaraes.ma.gov.br
Government administration company in Guimarães, Brazil managing municipal affairs and services for the local community |
163 |
| 49 |
Câmara Municipal da Figueira da Fozcm-figfoz.pt
The Figueira da Foz City Council invites you to visit their Linkedin page to connect with them They look forward to your visit |
161 |
| 50 |
Instituto Nacional de Investigação Agrária e Veterinária, IP (INIAV, IP)iniav.pt
An agricultural and veterinary research institute promoting research, experimentation, and education, supporting public policies and offering technical advice and services to industry stakeholders |
150 |
| 51 |
Portuguese Institute for Quality - IPQipq.pt
The organization manages and promotes the development of the Portuguese System for Quality, including standardization, metrology, and qualification at international level |
149 |
| 52 |
Agência para o Desenvolvimento e Coesão, IP – AD&Cadcoesao.pt
The company is responsible for coordinating regional development policies, supporting sustainable development, managing European Structural and Investment Funds, and optimizing financial investments coordination |
147 |
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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 Oct 9, 2026.
More company lists in Portugal
- The largest companies in Portugal 1,548
- Higher Education companies in Portugal 108
- IT Services and IT Consulting companies in Portugal 96
- Software Development companies in Portugal 81
- Hospitals and Health Care companies in Portugal 69
- SaaS companies in Portugal 56
- Construction companies in Portugal 44
- Financial Services companies in Portugal 41
- Retail companies 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 Manufacturing companies in Portugal 30
- Wellness and Fitness Services companies in Portugal 28