The Sarbanes-Oxley Act (SOX) primarily regulates the following:
- Board of Directors - It mandates certain governance standards for boards, including the establishment of audit committees.
- Public Accounting Firms - SOX imposes regulations on auditors and their independence from the companies they audit.
- Management - The Act requires management to take responsibility for the accuracy and completeness of financial reports.
Investors, on the other hand, are not directly regulated by the Sarbanes-Oxley Act. Instead, the Act is designed to protect investors by improving the accuracy and reliability of corporate disclosures and financial statements.
Therefore, the correct answer is Investors.