CORPORATE EVENT: Marathon Oil Corporation (MRO) 2 for 1 Stock Split 6/19/07

Clearing House Advisory Notices

To	Clearing Member Firms
From	Clearing House Department
Subject	CORPORATE EVENT: Marathon Oil Corporation (MRO) 2 for 1 Stock Split 6/19/07
Notice Date	2007-06-18
Notice Number	07-140
Effective Date	2007-06-19
Marathon Oil Corporation (MRO) has announced a 2-for-1 common stock split. The ex-distribution date for the stock split is Tuesday, June 19, 2007. Opening positions and start-of-day prices for June 19 will be based on final positions and settlement prices from Monday, June 18, 2007. This corporate action will be coordinated with the Options Clearing Corporation. For the full text of this advisory . . .