Fudge Factor 3000 writes "Apple and Exxon are fighting it out to be the company with the largest market cap. Tuesday, Apple pulled ahead. It is hard to believe a tech company can beat out an oil giant, but is the market cap really the measure of the size/influence of a company? It is certainly the simplest metric to consider. Ars is running an excellent article on how to measure the size of a company. They discuss different metrics such as cash balance, revenue, number of employees, etc."