S-1. An SEC form that a company usu. must file before listing and trading its securities on a national exchange. • Used primarily by first-time issuers of securities, this form is the basic, full-length registration statement that requires a great deal of information about the issuer and the securities being sold. The SEC has also adopted modified forms for smaller enterprises, such as Forms SB-1 and SB-2. — Also termed Form S-1.
[Blacks Law 8th]