AFG American Financial Group

National Interstate Corporation (Nasdaq:NATL) announced today that the Company's management will make a presentation at the upcoming INVESTOhio Equity Conference on Thursday, September 22, 2011 at 10:45 a.m. Eastern. The conference is being held at the Columbus Hilton Easton.

The presentation may include forward-looking and other material information and will be available on the Company's website at http://invest.natl.com.

About National Interstate Corporation

National Interstate Corporation (Nasdaq:NATL), founded in 1989, is the holding company for a specialty property-casualty insurance group which differentiates itself by offering products and services designed to meet the unique needs of niche markets. Products include insurance for passenger, truck, and moving and storage transportation companies, alternative risk transfer, or captive programs for commercial risks, specialty personal lines products focused primarily on recreational vehicle owners and small commercial vehicle accounts, and transportation and general commercial insurance in Hawaii and Alaska. The Company's insurance subsidiaries, including the three primary insurers, National Interstate Insurance Company, Vanliner Insurance Company and Triumphe Casualty Company, are rated "A" (Excellent) by A.M. Best Company. Headquartered in Richfield, Ohio, National Interstate is an independently operated subsidiary of Great American Insurance Company, a property-casualty subsidiary of American Financial Group, Inc. (NYSE:AFG) (Nasdaq:AFG).

CONTACT: Tanya Inama
         National Interstate Corporation
         877-837-0339
         investorrelations@nationalinterstate.com