Grant Thornton LLP is the United States member firm of Grant Thornton, a professional services network founded in 1924 that provides assurance, tax and advisory services to organizations worldwide. The network employs more than 80,000 professionals across 150 markets and reported global revenue of $8.5 billion, growing 6.1% annually. The US member firm employs more than 8,500 people across 59 offices and reported revenue of $1.9 billion, ranking as the 9th largest accounting firm in the United States.
The firm's work spans several technical domains relevant to technology professionals, including AI-powered technology, assurance, tax, advisory services and accounting. Advisory engagements combine AI-powered technology with industry-specific insights and cover consulting work across 16 distinct industries. Assurance services comprise audit and assurance for organizations, while tax services cover advisory and compliance work. The firm's US headquarters is located in Chicago.
Grant Thornton describes its operating philosophy as one in which "how we serve matters as much as what we do," emphasizing collaborative relationships built on trust and care and a commitment to dynamic businesses. The network combines global scale with deep local insight and states an aim of helping clients realize their ambitions beyond traditional accounting.






