Securities Act of 1933: Requires companies to file registration statements and disclose material information before offering securities to the public. Securities Exchange Act of 1934: Establishes the SEC and empowers it to regulate securities markets and participants. Sarbanes-Oxley Act of 2002: Imposes stricter regulatory requirements on publicly traded companies, including enhanced financial disclosures and audit standards. Dodd-Frank Wall Street Reform and Consumer Protection Act: Aims to reduce risks in the financial system by increasing transparency and accountability.