O dever de não aproveitamento de oportunidades de negócio societárias
: os efeitos do seu incumprimento como decorrência do dever de lealdade nas sociedades comerciais

  • Bárbara Marques Vieira (Student)

Student thesis: Master's Thesis


The proposed master’s dissertation focuses on the duty of not taking advantage of corporate business opportunities by the administrators and managers of commercial companies. This duty constitutes a derivation of the duty of loyalty set out in the article 64.º of the CSC, to which administrators and managers of the commercial company are attached. Therefore, we attempted to understand how could the application of this duty can be proceeded in a more coherent way, as for that purpose it would be necessary to create an abstract filling of the indetermined concept, which is the concept of “corporate opportunity”, since only the opportunities for business that are considered to belong to the company are prohibited to the administrators and managers of the company. Finally, we intend to understand how can the administrators and managers who have failed in the scope of this duty be sanctioned and based on what grounds.
Date of Award9 Jul 2021
Original languagePortuguese
Awarding Institution
  • Universidade Católica Portuguesa
SupervisorJosé Carlos Brandão Proença (Supervisor)


  • Corporate opportunities doctrine
  • Duty of loyalty
  • Duty of not taking advantage of corporate opportunities
  • Indetermined concept
  • Administrators and managers’ responsibility


  • Mestrado em Direito

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