Below are key milestones in our history:
| 1922 | Charles White and Percival Page open an accountancy practice in the Philippines. |
| 1948 | A new partnership is formed under Stewart, Dacanay, Cunanan & Co. |
| 1951 | Company name changes to Stewart, Cunanan & Co. |
| 1956 | Joaquin Cunanan becomes the first Filipino senior partner of the firm. |
| 1958 | The firm is designated as Price Waterhouse correspondent in the Philippines. |
| 1962 | Inauguration of Management Advisory, then Tax Services. |
| 1964 | Name changes to Joaquin Cunanan & Co. |
| 1970 | Jose Florento becomes senior partner. |
| 1972 | Opening of Davao branch office. |
| 1973 | Firm becomes a member of Price Waterhouse International. |
| 1975 | Opening of Cebu branch office |
| 1981 | Corazon de la Paz becomes chairman and senior partner; also becomes Price Waterhouse's first lady senior partner worldwide. |
| 1982 | 60th Anniversary |
| 1985 | Joaquin Cunanan elevated to the Accountancy Hall of Fame |
| 1991 | Opening of Bacolod branch office |
| 1994 | Opening of Iloilo branch office |
| 1997 | 75th anniversary |
| 1998 | Worldwide merger of Price Waterhouse with Coopers & Lybrand to create PricewaterhouseCoopers, the world's largest professional services organisation |
| 2001 | Jerry Isla becomes chairman and senior partner |
| 2002 | 80th Anniversary |
| 2005 | Company name changes to Isla Lipana & Co. |
| 2006 | Tammy Lipana becomes chairman and senior partner |
| 2007 | WE are 85! Wisdom and experience |
| 2009 | Judith V. Lopez is elected chairman and senior partner |