SEC Form 8-K is the "current report" that is used by most public companies to report the occurrence of any material events or corporate changes which are of importance to investors or security holders and previously have not been reported by the company.
Form 8-K provides more current information
You can find links to PDF versions of SEC public forms and many of the rules, regulations, and schedules associated with these forms at the SEC Forms List Web site. You can find SEC Form 8-K and General Instructions at the SEC Forms List Web site.