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Our heritage

Helping clients unlock their potential for growth has been deeply embedded in Grant Thornton’s DNA for more than 100 years.

What do Grant and Thornton stand for?

In 1924, Alexander Richardson Grant 26 years old and “senior accountant” the accounting firm Ernst & Ernst in Cleveland (Ernst & Ernst was later Ernst & Young). This was during the golden years after World War I and before the Great Depression, and business was good.

Timeline

The history of Grant Thornton

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The young accountant had a vision to become the leader in the segment of medium-sized businesses and left security at Ernst & Ernst to start his own company along with Willam O’Brien. The company’s name was Alexander Grant & Co., and was based in Chicago.

During the following decades, the company expanded from the Midwest to be available across the U.S.. Alexander Grant died in 1938 just 40 years old, but the company survived. In 1959 Britain had the two regional accounting firms Thornton & Thornton in Oxford and Baker & Co in Leicester and Northampton merged to form Thornton Baker. Over the next 16 years were no less than 38 acquisitions and the company was called “The Thundering Herd” – the thundering herd.

During the 60th century, expanded the U.S. firm internationally and formed the company in Australia, Canada and the UK. 1980, Alexander Grant joined forces with 49 other international firms and created a global network. 1986 was the American and English firm together and took the common name Grant Thornton.