In this article shareholders’ rights as a constituent part of investment mediums’ attractiveness on securities market are researched. For this purpose there was realized a comparative analysis of the minimal values for the origin of those rights and their essence in the Republic of Moldova and some CIS member states. The comparison was implemented according to the following categories of rights: to initiate questions for their introduction into agenda of the annual shareholders’ meeting, to advance candidatures for election in the board of directors of the joint-stock company, to introduce questions into agenda of the annual shareholders’ meeting, to set a price of the stock floatation, to call a special annual shareholders’ meeting, to resort to litigation for reparation of damages, caused by corporate authorities etc. There was made a conclusion stating that for activation of the investment activity on securities market scrupulous attention should be paid to increasing the amount of minority shareholders’ rights.