Grant Thornton LLP

About Grant Thornton LLP

Grant Thornton LLP is the U.S. member firm of Grant Thornton International Ltd, a network of independent audit, tax and advisory firms. It is a licensed independent CPA firm that performs attest work, while the affiliated Grant Thornton Advisors LLC provides tax and business consulting under an alternative practice structure. The firm was founded in 1924 as Alexander Grant & Co. and is headquartered in Chicago. Its work is organized into audit and assurance, tax, and advisory service lines, with advisory covering mergers and acquisitions advice, Sarbanes-Oxley compliance and business valuations.

The organization is an accounting and advisory firm rather than a law practice. Its tax services include federal, state and local, and international tax compliance and advisory, along with compensation and benefits consulting. Its New York presence, as listed on its official site, includes a New York City office at 757 Third Avenue and a Long Island office in Melville. The firm describes itself as having dozens of offices nationwide.

Practice areas

Areas of work that Grant Thornton LLP describes on its own website. They describe the organization as a whole, not the practice of any individual attorney listed below.

Organization profile based on its official website and public sources (reviewed October 30, 2026). Attorney list from the New York State Unified Court System registration data. Not affiliated with Grant Thornton LLP.

Registered attorneys

Registration status can change at any time. Confirm any attorney's current status through the official New York Attorney Search.