The founding partners of Abreu & Marques, together with other lawyers initiated a joint practice in 1972, thereby founding the partnership. The law firm was incorporated in 1980, immediately upon the advent of the publication of legislation which allowed for the incorporation of these types of firms.

It was a pioneering firm in the internationalization of the Portuguese legal practice, opening a branch in London in 1987. In 1992 it opened an office in Funchal to handle local matters in connection with the Madeira International Business Center. Within the scope of its continued expansion the firm has presently associations with offices in Angola, Mozambique and correspondents throughout Europe, in the United States and in Brazil, being a member of The Law Firm Network.

In 2001, Abreu & Marques e Associados integrated the law firm Luís Vinhas, Isabel Garcia e Associados, with experience in the areas of commercial law and in civil law litigation. As a result, the firm adopted for a period the name of Abreu & Marques, Vinhas e Associados.

In the latter part of its third decade of continued existence, Abreu & Marques e Associados, with the natural renovation of its partners, lawyers and staff, remains focused in what has been its guiding strategy since incorporation: giving technically sustainable solutions for the resolution of the matters assisted within the practice, adding value to the interests of its clients which, being the reason of its very existence, are its absolute priority.