X0202 4/A 2006-05-17 2006-05-19 0000874977 State Auto Financial CORP STFC 0001184026 BLACKBURN MARK A 518 E. BROAD STREET COLUMBUS OH 43215 0 1 1 0 Senior Vice President Common Shares without par value 2006-05-17 4 A 0 10000 0 A 17024.866 D Employee Stock Option (Right to Buy) NQ 33.50 2006-05-17 4 A 0 15939 0 A 2007-05-17 2016-05-16 Common Shares 15939 15939 D Employee Stock Option (Right to Buy)ISO 33.50 2006-05-17 4 A 0 4061 0 A 2007-05-17 2016-05-16 Common Shares 4061 4061 D field should be left blank, but due to a software defect, requires input. The options vest in three equal installments beginning on May 17, 2007. Includes the following acquisitions: 27.241 shares acquired in December 2004, 45.237 shares acquired in March 2005, 51.224 shares acquired in June 2005, 44.973 shares acquired in September 2005, 31.937 shares acquired in December 2005, 41.452 shares acquired in March 2006 and 37.172 shares acquired in June 2006 through the STFC 401(K) Stock Purchase Plan. Includes the following acquisitions: 10.633 shares acquired in January 2006, 11.677 shares acquired in March 2006 and 12.981 shares acquired in June 2006 under the dividend reinvestment feature of the STFC Employee Stock Purchase Plan; and 0.093 shares acquired in January 2006, 0.115 shares acquired in March 2006 and 0.12 shares acquired in June 2006 under the STFC Dividend Reinvestment Plan. Includes the following acquistions: 302.400 shares acquired in May 2006 through the State Auto Financial Corporation Employee Stock Purchase Plan. Mark A. Blackburn by John R. Lowther, attorney in fact pursuant to a POA filed with the Commission on 3-8-00 2006-07-20