Exxon Mobile and Wal-Mart Stores top this year's Fortune 500 list, but the highest-ranked company from the Philadelphia area was AmerisourceBergen, at number 26, up from number 28 last year.

Exxon Mobile and Wal-Mart Stores top this year's Fortune 500 list, but the highest-ranked company from the Philadelphia area was AmerisourceBergen, at number 26, up from number 28 last year.