APA Arbitration Day 2022 took place on the 26th May at the Faculty of Law of the University of Lisbon, where the international seminar on "Self-Regulation of Arbitration Practice: the Role of Arbitration Institutions" took place. We thank the speakers - Deva Villanúa, Philippe Pinsolle, Maria Beatrice Deli, Isabel Cantidiano and Joaquim Shearman de Macedo - who participated in this seminar, moderated by Sofia Martins and opened and concluded by Dário Moura Vicente.