For the second year in a row, seven area companies have made the Fortune 500 list, which is based on annual revenue. The companies are: Centene (No. 25), Emerson Electric (No. 206), Reinsurance Group of America (No. 257), Edward Jones (No. 333), Graybar Electric (No. 378), Olin Corp (No. 410), and Ameren (No. 480).
