5 1 NASDAQ 0001128308 Director Ohio Casualty Corporation 0000073952 31-0783294 12/31/02 5 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 5 ANNUAL STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP [ ] Check box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. [ ] Form 3 Holdings Reported [ ] Form 4 Transactions Reported 1. Name and Address of Reporting Person(s) MARCUM, STEPHEN S. 1345 SMITH ROAD HAMILTON, OH 45013 2. Issuer Name and Ticker or Trading Symbol Ohio Casualty Corporation (OCAS) 3. I.R.S. Identification Number of Reporting Person, if an entity (Voluntary) 4. Statement for Month/Year 12/02 5. If Amendment, Date of Original (Month/Year) 6. Relationship of Reporting Person(s) to Issuer (Check all applicable) [X] Director [ ] 10% Owner [ ] Officer (give title below) [ ] Other (specify below) Non-Employee Director 7. Individual or Joint/Group Filing (Check Applicable Line) [X] Form filed by One Reporting Person [ ] Form filed by More than One Reporting Person

Table I Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned ------------------------------------------------------------------------------------------------------------------------------------ 1)Title of Security 2)Trans- 3.Trans- 4.Securities Acquired(A) 5)Amount of 6) 7)Nature of action action or Disposed of (D) Securities Indirect Date Code A Beneficially D Beneficial (Month/ or Owned at or Ownership Day/Year) Code Amount D Price End of Year I ------------------------------------------------------------------------------------------------------------------------------------ Common Stock ~~303~~06/03/02 A 751 (1) A $19.9600 D Direct Common Stock 11/15/02 G 75 D 265,595 D Direct Common Stock 114,580 I ~~Employee~~Self ~~Savings~~as ~~Pln~~custodian Common Stock 3538,500 I ~~Supplemental~~by ~~ESP~~Son Common Stock 5,950 I by Spouse Table II (PART 1) Derivative ~~Securitites~~Securities Acquired, Disposed of, or Beneficially Owned (Columns 1 through 6) ------------------------------------------------------------------------------------------------------------------------------------ 1)Title of Derivative 2)Conversion 3)Trans- 4)Trans- 5)Number of Derivative 6)Date Exercisable and Security or Exercise action action Securities Acquired (A) Expiration Date Price of Date Code or Disposed of (D) Derivative Security Code A D Exercisable Expiration ------------------------------------------------------------------------------------------------------------------------------------ Non-Qualified Stock Option $1113.~~2000~~1250 0903/1923/01 A03/23/10 ~~200,000~~(right 09to buy) Non-Qualified Stock Option $8.6000 04/1923/11 (right to buy) Non-Qualified Stock Option $15.2500 11/23/95 05/23/05 (right to buy) Non-Qualified Stock Option $16.1875 10/21/93 04/21/03 (right to buy) Non-Qualified Stock Option $23.6250 11/27/98 05/27/08 (right to buy) Performance Shares 12/31/02 A 229 Table II (PART 2) Derivative ~~Securitites~~Securities Acquired, Disposed of, or Beneficially Owned (Columns 1,3 and 7 through 11) ------------------------------------------------------------------------------------------------------------------------------------ 1)Title of Derivative 3)Trans- 7)Title and Amount 8)Price 9)Number of 10) 11)Nature of Security action of Underlying of Deri- Derivative Indirect Date Securities vative Securities D Beneficial Amount or Security Beneficially or Ownership Number of Owned at I - Title Shares End of Year ------------------------------------------------------------------------------------------------------------------------------------ Non-Qualified Stock Option ~~09/19/01~~Common Stock 15,000 15,000 D Direct (right to buy) Non-Qualified Stock Option Common Stock ~~200~~6,000 ~~200~~6,000 D Direct (right to buy) Non-Qualified Stock Option Common Stock 6,000 6,000 D Direct (right to buy) Non-Qualified Stock Option Common Stock 6,000 6,000 D Direct (right to buy) Non-Qualified Stock Option Common Stock 6,000 6,000 D Direct (right to buy) Performance Shares 12/31/02 Common Stock 229 (2) 4,350 D Direct Explanation of Responses: (1) Shares awarded pursuant to the Ohio Casualty Corporation 2002 Stock Incentive Plan as partial payment of 2002 annual retainer. (2) The performance shares were accrued under the Ohio Casualty Corporation Directors Deferred Compensation Plan during 2002 and are to be settled in cash upon the reporting person's retirement.

SIGNATURE OF REPORTING PERSON /S/ MARCUM, STEPHEN S. DATE 02/06/03

Filing Compare · OHIO CASUALTY CORP