X0303 4 2010-05-07 0000874977 State Auto Financial CORP STFC 0001398593 Baker Robert Ellison 1310 GLEN CEDARS DRIVE MABLETON GA 30126 1 0 0 0 Restricted Stock Units 2010-05-07 4 A 0 2781 0 A Common Stock 2781 7690.537 D Includes restricted share units previously granted under Oustide Directors Restricted Share Unit Plan and restricted share units credited with dividends, equivalent in value to those declared and paid on one share of STFC common stock; 41.364 shares acquired on 6/30/09; 39.695 shares acquired on 9/30/09; 39.608 shares acquired on 12/31/09 and 40.398 shares acquired on March 31, 2010. Each restricted share unit represents a right to receive one share of STFC common stock. The Restricted Share Units become payable, in cash or common shares, at the election of the reporting person, upon the reporting person's termination of services as a director. Robert E. Baker by James A. Yano, attorney in fact pursuant to a POA filed with the Commission 5-8-07 2010-05-07