This research project has examined the nature of shares and class rights in Nigeria's Company Law with a view to stimulating intellectual discussions on the subject, broadening the knowledge of existing shareholders as regards their rights and drawing the attention of the general public investors to the viable investment options that 'shares' provide. In doing that, the work has been organized into five chapters, with chapter one providing the approach and theoretical framework of the study as well as conceptual clarifications. Chapter two provided an extensively review some related literature on the nature of shares and class rights in Nigeria's Company Law. Particular attention was placed on a review of literature on the subject matter by Nigerians consisting of academics and practitioners. Chapter three and four provided an analysis of the nature of shares and the rights attached to classes of shares under Nigerian Company Law, respectively. These two chapters, to the extent allowed by the scope of study, respectively, probed the legal principles governing shares and class rights under Nigerian Company Law. Lastly, chapter five is a summary and conclusion of the book.