CORPORATE EVENT: Express Scripts, Inc. (ESRX) 2 for 1 Stock Split 6/25/07

Clearing House Advisory Notices

To	Clearing Member Firms
From	Clearing House Department
Subject	CORPORATE EVENT: Express Scripts, Inc. (ESRX) 2 for 1 Stock Split 6/25/07
Notice Date	2007-06-22
Notice Number	07-145
Effective Date	2007-06-25
Express Scripts, Inc. (ESRX) has announced a 2-for-1 common stock split. The ex-distribution date for the stock split is Monday, June 25, 2007. Opening positions and start-of-day prices for June 25, 2007 will be based on final positions and settlement prices from Friday, June 22, 2007. This corporate action will be coordinated with the Options Clearing Corporation. For the full text of this advisory . . .