| 1849 |
Samuel Lowell Price sets up business in London. |
| 1854 |
William Cooper establishes his own practice in London, which seven years later becomes Cooper Brothers. |
| 1865 |
Price, Holyland and Waterhouse join forces in partnership. In seven years the company's name changes to Price, Waterhouse & Co. |
| 1898 |
Robert H. Montgomery, William M. Lybrand, Adam A. Ross Jr. and his brother T. Edward Ross form Lybrand, Ross Brothers and Montgomery. |
| 1957 |
Cooper Brothers & Co (UK), McDonald, Currie and Co (Canada) and Lybrand, Ross Bros & Montgomery (US) merge to form Coopers & Lybrand. |
| 1982 |
Price Waterhouse World Firm is formed. |
| 1990 |
Coopers & Lybrand merges with Deloitte Haskins & Sells in a number of countries around the world. |
| 1998 |
Worldwide merger of Price Waterhouse and Coopers & Lybrand creates PricewaterhouseCoopers. |