What is the current source of GAAP in the private sector?

In the private sector, the current source of Generally Accepted Accounting Principles (GAAP) is primarily the Financial Accounting Standards Board (FASB). The FASB establishes and maintains standards for financial reporting, which are recognized as authoritative guidelines for U.S. companies. Additionally, the Accounting Standards Codification (ASC) serves as the official source of GAAP in the United States, providing a structured framework for accounting standards.