For Teixeira Duarte, 1998 was marked by the opening of the share capital of "Teixeira Duarte - Engenharia e Construções, S.A." to public investment, with the shares being listed on the then so-called "Lisbon Stock Exchange", now Euronext Lisbon.

This process had two particularities, as it was the only case of an entity that already had sufficiently dispersed capital at the time of its listing, and on the other hand, it maintained since then, and until today, an imputation of domain by the family company, Teixeira Duarte - Sociedade Gestora de Participações Sociais, S.A."