A Shareholder Agreement Transfer of Shares (SATOS) agreement is a legal document that defines how the ownership of a company can be transferred. It outlines how stock can be bought and sold, who has the right to vote on corporate matters, rules for issuing shares, and other important information about shareholders’ rights and responsibilities. In essence, a SATOS agreement establishes rules around when and how an ownership transfer occurs. This agreement allows shareholders to protect their investments by establishing clear expectations and guidelines that must be followed in order for a transfer of shares to take place. By creating a legally-binding contract between all parties involved, this type of agreement ensures that everyone understands their rights and obligations – and that transfers are processed smoothly and promptly.