Teixeira Duarte, S.A. is a Portuguese multinational conglomerate founded in 1921 as an engineering and construction firm, now leading operations across six key sectors: construction, concessions and services, real estate, hospitality, distribution, and automotive. Headquartered in Oeiras at Lagoas Park, it employs over 8,600 to 11,000 workers across 20 to 22 countries, including Portugal, Angola, Brazil, Mozambique, Spain, Algeria, and others like the United States and Qatar. Construction remains its core business through Teixeira Duarte – Engenharia e Construções, S.A., specializing in geotechnical engineering, buildings, infrastructures, underground, railway, and maritime works. The group diversifies into real estate development for residential and commercial uses, facilities management, food and pharmaceutical retail under brands like Maxi and Farmácia Popular, hotel operations, and automotive distribution of vehicles, motorcycles, and equipment. With a history of international expansion since the 1970s and family-controlled majority ownership, Teixeira Duarte, S.A. plays a significant role in global infrastructure, services, and consumer markets, reporting operating income around 843 million euros and an order portfolio of 1,540 million euros in recent data.