This note provides an overview of the regulatory documents the Securities and Exchange Commission (SEC) requires of public companies in the United States. Specifically, an S-1 filing is required by any security that meets SEC criteria before shares can be listed on a national exchange, and thereafter, the SEC requires Form 10-Q or 10-K quarterly. The note provides details about these three primary communication disclosures, plus links to other resources where students can learn more. It is meant to be a quick reference guide for business or commerce students.