X0303 4 2010-05-07 0000874977 State Auto Financial CORP STFC 0001023572 DANTONI DAVID J 15821 SAVONA WAY NAPLES FL 34110 1 0 0 0 Restricted Stock Units 2010-05-07 4 A 0 2781 0 A Common Stock 2781 10766.721 D Includes restricted share units previously granted under Outside 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; 64.425 shares acquired on 12/31/09 and 65.711 shares acquired on 03/31/10. 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 service as a director. David J. D'Antoni by James A. Yano, attorney in fact pursuant to a POA filed with the Commission on 5-4-07 2010-05-07