Fortune has released its annual list of top US companies, and Apple is again situated at number five on the list, following the same four companies it did last year: Walmart at the top of the list, followed by Exxon Mobil, Chevron, and financial firm Berkshire Hathaway. The listing, which prizes raw revenue over most other factors, noted however that Apple had the highest profits and market share value of any other company on the list.