Deloitte Touche Tohmatsu is one of the Big Four auditors. Previously known as Deloitte & Touche, it was formed by merger of Touche Ross and Deloitte Haskins & Sells in August 1989. Its global headquarters are located in Manhattan, New York City.
The names in the company title refer to William Welch Deloitte , George Touche , and Admiral Nobuzo Tohmatsu.
