In the legal architecture of the company, the articles of association are the official backbone, while the shareholders' agreement is often its strategic shadow. Through a rigorous, well-documented analysis, this book explores the unique place of shareholders' agreements in relation to the company's articles of association, highlighting the tensions, complementarities and conflicts that can [...] on in-depth case law research, particularly in the context of Tunisian law, the book highlights the practical issues involved in the coexistence of these two instruments. It examines the legal scope of the covenant, its binding force, and its resistance (or otherwise) to statutory rules and corporate public policy [...] combining doctrine, case law and business practice, this work aims to provide practitioners, researchers and students with a critical and structured reading of extra-statutory contractual mechanisms, and to answer a central question: can the shareholders' agreement truly shape the life of the company without circumventing the law?