Teixeira Duarte, S.A. operates with its subsidiaries in construction, concessions and services, real estate, hospitality, distribution, and automotive sectors across Portugal, Angola, Brazil, Mozambique, and internationally. Its construction activities include geotechnical engineering, rehabilitation, buildings, infrastructure, metalworking, and underground, railway, and maritime works. The company also provides concessions and services such as facilities management, educational activities, environmental initiatives, and small hydropower plants. It develops and manages real estate, operates hotels, offers catering, and retails food under Maxi and Pastelarias Nilo, furniture and decoration under Dakaza, and pharmaceutical products and services under Farmácia Popular. Additionally, it distributes light cars, motorcycles, and equipment under the TDA brand and provides technical assistance. Founded in 1921, it is headquartered in Oeiras, Portugal.