The U.S. Securities and Exchange Commission (SEC) aims to protect investors and maintain efficient markets through regulation and oversight of the securities industry, ensuring transparency and fairness in investment practices. Established in 1934 following the Great Depression, the SEC requires public companies to disclose crucial financial information, actively enforces securities laws, and coordinates with various market participants to uphold investor protection. The agency operates through several divisions focused on areas like corporation finance, trading and markets, enforcement, and investment management to implement its mission effectively.