Stock Trading History of Haffner Paul

The following table details the trading activities (stock purchases, stock sales, and stock option exercises) reported to the Securities and Exchange Commission (SEC) by insider Haffner Paul since year 2005. The trader's CIK number is 1328452. At the time of this reporting, Haffner Paul is the VP, Sec'y & General Counsel of National Interstate Corp (stock ticker symbol NATL).

Stock purchases, sales, and option exercises reported by *Haffner Paul* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2007-09-17	NATL	National Interstate Corp	Sale	5,320	29.02	154,362
2007-09-17	NATL	National Interstate Corp	Option Exercise	5,320	15.03	79,959
2007-09-07	NATL	National Interstate Corp	Sale	1,680	30.50	51,236
2007-09-07	NATL	National Interstate Corp	Option Exercise	1,680	15.03	25,250
2007-01-30	NATL	National Interstate Corp	Option Exercise	1,000	15.03	15,030

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Haffner Paul (VP, Sec'y & General Counsel of National Interstate Corp at the time of this reporting) see the Securities and Exchange Commission (SEC) website.