This building called "Sonae Maia Business Center" is the headquarters of SONAE.
Sonae is one of the biggest Portuguese companies is in the
PSI20 stock market main index companies that trade on
Euronext Lisbon.
Sonae is a conglomerate, and is the largest private employer in Portugal. The company is primarily engaged in the operation of retail stores through its subsidiary Modelo Continente.
Additionally, the company operates other businesses including real estate development, communication and information technology services, tourism services and other related activities through its subsidiaries Sonae Sierra, Sonaecom, and Sonae Distribuição. Sonae operates primarily in Europe. It is headquartered in Maia, Portugal and employs about 39,000 people. Sonae SGPS, the holding company, is listed on the Euronext Lisbon stock exchange. The president and main shareholder is Belmiro de Azevedo, one of the most influent Portuguese businessmen and a Forbes fortunes figure. Sonae was originally an acronym standing for Sociedade Nacional de Estratificados (roughly, National Company of Engineered wood). Engineered wood were the company's original line of business which is now fully integrated into the totally autonomous spin-off Sonae Indústria. It was the only Portuguese company to be included in the list of the 110 World's Most Ethical Companies (Ethisphere prizes), in 2011.
From: Wikipedia