DEFINITION of 'SEC Form 424A'
The prospectus form that a company must file if it has made significant changes to a previously-filed prospectus submitted as part of its registration statement. A company must provide five copies of each prospectus form prior to the effective registration date of the change.
BREAKING DOWN 'SEC Form 424A'
A prospectus is a printed legal document that companies publish prior to selling a security; it details financial information about the company and the securities it is making available for sale (i.e. investment objectives, risks, fees, etc.). Companies are required to file prospectus form 424A in accordance with SEC Rule 424(a).