As the power and breadth of the Fortune 500 goes on display in this issue, one of its best-known companies, Apple, stands out for so many reasons they are barely countable. In the list itself, Apple is the star, unchallenged. Once a tag-along, it has mountain-climbed to No. 6, with $156.5 billion in revenues. Its 2012 profits were an eye-popping $42 billion (second only to Exxon's $45 billion); its market value of $416 billion led all others at our March measurement date, and it has a pure monopoly on 10-year shareholder returns: first in earnings-per-share growth, with an incandescent annual rate of 86%, and first in total return, with an annual 54%.