FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * PETRUCCI JOHN M   2. Issuer Name and Ticker or Trading Symbol State Auto Financial CORP [STFC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Senior Vice President (Last) (First) (Middle) 518 E. BROAD STREET 3. Date of Earliest Transaction (Month/Day/Year) 11/30/2017 (Street) COLUMBUS, OH 43215 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Shares without Par Value 11/30/2017   M   3,657 A $ 13.53 22,980.839 (1) D   Common Shares without Par Value 11/30/2017   S   3,657 D $ 27.94 19,323.839 D   Common Shares without Par Value 11/30/2017   M   3,499 A $ 25.81 22,822.839 D   Common Shares without Par Value 11/30/2017   S   3,499 D $ 27.88 19,323.839 D   Common Shares without Par Value 11/30/2017   M   3,526 A $ 14.49 22,849.839 D   Common Shares without Par Value 11/30/2017   S   3,526 D $ 27.7 19,323.839 D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Employee Stock Option Right to Buy (NQ)

$ 13.53

11/30/2017

M

3,657

03/01/2013

02/28/2022

Common Shares

3,657

$ 0

3,657

D

Employee Stock Option Right to Buy (NQ)

$ 25.81

11/30/2017

M

3,499

03/06/2009

03/05/2018

Common Shares

3,499

$ 0

3,499

D

Employee Stock Option Right to Buy (NQ)

$ 14.49

11/30/2017

M

3,526

03/05/2010

03/04/2019

Common Shares

3,526

$ 0

3,256

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
PETRUCCI JOHN M 518 E. BROAD STREET COLUMBUS, OH 43215			Senior Vice President

Signatures

/s/John M. Petrucci by Melissa A. Centers, attorney in fact pursuant to POA filed with Commission 11-16-15.		12/04/2017
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Includes the following acquisitions: 67.001 shares acquired in September 2016, 58.876 shares acquired in December 2016, 62.179 shares acquired in March 2017, 68.290 shares acquired in June 2017 and 67.584 shares acquired in September 2017 as dividend reinvestment; 443.825 shares acquired in December 2016 and 372.317 shares acquired in June 2017 under the State Auto Financial Employee Stock Purchase Plan.

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