A Form S-1 is the registration statement a company files with the SEC to go public, disclosing its business, financials, risk factors, and use of proceeds. It is the foundational document of an IPO and a rare, detailed public window into a private company — read closely by investors, journalists, and competitors. The narrative embedded in the S-1's business description and risk factors is a communications artifact as much as a legal one, and it shapes the story a company IPOs on.