Exhibit 31.1
I, George Paz, certify that:
1. | I have reviewed this Amendment No. 1 to the annual report on Form 10-K/A of Express Scripts, Inc.; |
2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report. |
Date: April 2, 2012
/s/ George Paz | ||
George Paz, Chairman, President and | ||
Chief Executive Officer |