X0306 4 2017-05-05 0000874977 State Auto Financial CORP STFC 0001444790 MALLESCH EILEEN A 1217 SANCTUARY PLACE GAHANNA OH 43230 1 0 0 0 Restricted Share Units 2017-05-05 4 A 0 3343 0 A Common Stock 3343 27247.347 D Each restricted share unit represents a right to receive either one share of STFC common stock or the cash equivalent thereof, as further described in the Outside Directors Restricted Share Unit Plan. 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, following a 6 month vesting period. 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; 109.799 restricted share units acquired on 6/30/16; 101.869 restricted share units acquired on 9/30/16; 88.214 restricted share units acquired on 12/31/16 and 86.516 restricted share units acquired on 3/31/17, Eileen A. Mallesch by Melissa A. Centers, attorney in fact, pursuant to a POA filed with the Commission 5-9-16. 2017-05-09