A stock transfer agent, transfer agent, share registry or transfer agency is an entity, usually a third-party firm unrelated to security transactions, that manages the change in ownership of company stock or investment fund shares, maintains a register of ownership and acts as paying agent for the payment of dividends and other distributions to investors. The name derives from the impartial intermediary role a transfer agent plays in validating and registering the purchase of new ownership shares and, in the case of a transfer of ownership, cancelling the name and certificate of shareholders who sell shares and substituting the new owner's name on the official master shareholder register.