Grant Thornton LLP at a Glance


  • “The people I work with are great to be around, well rounded, and eager to teach”
  • “Phenomenal client base”
  • “Schedule flexibility”


  • “Long hours during busy seasons”
  • “Stigma of not being Big 4”
  • “Slow in reacting to industry trends”

The Buzz

  • “Excellent reputation—most Prestigious non-Big 4”
  • “Okay firm; not sure what they want to be when they grow up”
  • “People seem to really enjoy working there”
  • “You’ll work just as hard as at a Big 4 but get fewer perks”

About Grant Thornton LLP

Based in Chicago with an international reach 

Grant Thornton LLP is the U.S. member firm of Grant Thornton International Ltd. Grant Thornton's service lines are divided into audit, tax, and advisory services. In regards to industry, it fields practices in consumer and industrial products; technology; financial services and institutions; not-for-profit; construction, real estate, and hospitality; global public sector (including local, state, federal, and international governments); health care; and private equity, among others. 

Alexander Richardson Grant, the namesake of the firm, began his accounting career at Ernst & Ernst (a predecessor of Ernst & Young) but, at the tender age of 26, decided it was time to be his own boss. Alexander Grant & Co. opened in Chicago in 1924 with a mission to provide accounting services to middle-market companies. Grant died suddenly in 1938, but his firm continued to grow. By 1961, net revenue exceeded $5 million, and in the late 1960s, Alexander Grant & Co. joined with firms in Australia, Canada, and the U.K. to establish Alexander Grant Tansley Witt, which operated internationally for 10 years. Grant Thornton International was born in 1980 when Grant and 49 other international accounting firms formed a global organization; by 1985, Alexander Grant & Co. was ranked the ninth-largest accounting firm in the U.S. It changed its name to Grant Thornton in 1986, a reflection of its affiliation with the U.K. firm Thornton Baker (which also changed its name).   

Today, Grant Thornton LLP employs nearly 6,500 people and is the sixth-largest accounting firm in the U.S., according to Accounting Today's latest rankings by revenue.

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Grant Thornton LLP

175 West Jackson Boulevard
20th Floor
Chicago, IL 60604
Phone: (312) 856-0200
Fax: (312) 602-8099


  • Employer Type: Private Partnership
  • CEO: J. Michael McGuire
  • 2015 Employees: 6,500

Major Office Locations

  • Chicago, IL

Vault Company ID: 28635

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