In addition to filing annual reports on Form 10-K and quarterly reports on Form 10-Q, publicly reporting companies must report certain material corporate events on a more current basis. Form 8-K is known as a “current report” and it is the report that companies must file with the SEC to announce major events that shareholders should know about.
Companies generally have four business days to file a Form 8-K for an event that triggers the filing requirement. However, if the issuer is furnishing a Form 8-K solely to satisfy its obligations under Regulation FD, then the due date might be earlier.