Robert Hiester Montgomery was an American accountant and educator. He also co-founded what is today the world's largest accounting firm, PricewaterhouseCoopers.

PricewaterhouseCoopers International Limited is a multinational professional services brand of firms, operating as partnerships under the PwC brand. It is the second-largest professional services network in the world and is considered one of the Big Four accounting firms, along with Deloitte, EY, and KPMG.