CORPORATE EVENT: Tesoro Corp. (TSO) 2 for 1 Stock Split 5/30/07

Clearing House Advisory Notices

To	Clearing Member Firms
From	Clearing House Department
Subject	CORPORATE EVENT: Tesoro Corp. (TSO) 2 for 1 Stock Split 5/30/07
Notice Date	2007-05-25
Notice Number	07-123
Effective Date	2007-05-30
Tesoro Corporation (TSO) has announced a 2 for 1 common stock split. The ex-distribution date for the stock split is Wednesday, May, 30, 2007. Opening positions and start-of-day prices for May 30, 2007 will be based on final positions and settlement prices from Tuesday, May 29, 2007. This corporate action will be coordinated with the Options Clearing Corporation. For the full text of this advisory . . .