Exhibit 31.2
I, Jeffrey Hall, certify that:
1) | I have reviewed this quarterly report on Form 10-Q 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: July 29, 2009 | By: | /s/ Jeffrey Hall | |
Jeffrey Hall | |||
Executive Vice President and Chief Financial Officer |