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A stock transfer agent or share registry is a company, usually a third party unrelated to stock transactions, which cancels the name and certificate of the shareholder who sold the shares of stock, and substitutes the new owner's name on the official master shareholder listing.

Transfer Agents

Companies that have publicly traded securities typically use transfer agents to keep track of the individuals and entities that own their stocks and bonds.

Transfer agents perform three main functions:

1. Issue and cancel certificates to reflect changes in ownership. For example, when a company declares a stock dividend or stock split, the transfer agent issues new shares. Transfer agents keep records of who owns a company’s stocks and bonds and how those stocks and bonds are held—whether by the owner in certificate form, by the company in book-entry form, or by the investor’s brokerage firm in street name. They also keep records of how many shares or bonds each investor owns.
2. Act as an intermediary for the company. A transfer agent may also serve as the company’s paying agent to pay out interest, cash and stock dividends, or other distributions to stock- and bondholders. In addition, transfer agents act as proxy agent (sending out proxy materials), exchange agent (exchanging a company’s stock or bonds in a merger), tender agent (tendering shares in a tender offer), and mailing agent (mailing the company’s quarterly, annual, and other reports).
3. Handle lost, destroyed, or stolen certificates. Transfer agents help shareholders and bondholders when a stock or bond certificate has been lost, destroyed, or stolen. If this has happened to you, read our publication entitled Stock Certificates, Lost, Stolen. Also, if you hold securities in your own name and want to transfer or sell them, you may need to get your signature "guaranteed" before a transfer agent will accept the transaction.