A shareholder’s agreement is an agreement between the shareholders of the company. It’s an agreement that can be used to determine what happens if one of you wants to leave, if one of you wants to retire and if one of you were to die, and also for mechanisms for dealing with disputes. In a shareholder’s agreement, you can ensure that any decisions are taken by the company are subject to agreement by all shareholders and also, you can set out specific provisions, like the price you’re going to pay for somebody’s shares, or the mechanism by which you resolve your disputes.