The process of filing the necessary documentation with the appropriate authorities for an offering of securities to the public, and having this registration approved or declared effective. In Europe, filing is generally made with the stock market(s) on which the stock is to be traded, as well as with the competent authorities for such filings in the home country of the stock market(s). In the USA, the registration statement is filed with the SEC, which also declares it effective. See 'Registration Statement'.