When a company is about to be listed in the ATHEX with public offering the investor must declare to the Underwriter, the Investor Share, the Securities Account and the Operator of the account where the securities will be registered or declare CSD as his operator in case he wishes the securities to be recorded in the Special Account.

When a company is about to be listed in the ATHEX with public offering the investor must declare to the Underwriter, the Investor Share, the Securities Account and the Operator of the account where the securities will be registered or declare CSD as his operator in case he wishes the securities to be recorded in the Special Account. After the accomplishment of the offering and after having obtained the previous consent of the ATHEX, the issuer informs the CSD about the identity of the new shareholders and the number of the securities each one holds.

The recording of the securities in the investor Securities Account is affected by CSD two days before the trading of the securities at the ATHEX. During this period the issuers can be informed through DSS about the enter of these securities. The securities are definitely registered in the investor's Securities Account and become available on the trading day at the ATHEX.