An offering that is effected through a filing with an exchange regulatory (e.g., Securities and Exchange Commission) for registration of a public offering, where an issuer embarks on an immediate sale of all the securities being registered. As opposed to a “shelf offering” (where the securities will be kept on the shelf, until the time the issuer decides to offer them (in which case, these securities will be taken off the shelf), a non-shelf offering involves an offering with no delay.

An issuer can amend a registration statement to convert a non-shelf offering to a shelf offering, if such a conversion is carried out before the registration statement is declared effective. As in the case of a non-shelf registration statement, additional securities also may be added to the registration statement by an amendment prior to declaration of a registration statement going effective.