Stock Trading History of Sheffield Kathy I

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 Sheffield Kathy I since year 2005. The trader's CIK number is 1211652. At the time of this reporting, Sheffield Kathy I is the Vice President and Treasurer of Aaon Inc (stock ticker symbol AAON).

Stock purchases, sales, and option exercises reported by *Sheffield Kathy I* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2007-09-20	AAON	Aaon Inc	Sale	1,500	20.75	31,125
2007-09-19	AAON	Aaon Inc	Sale	10,500	20.77	218,042
2007-09-19	AAON	Aaon Inc	Option Exercise	12,000	3.85	46,200
2006-11-30	AAON	Aaon Inc	Option Exercise	2,800	5.78	16,184
2006-11-30	AAON	Aaon Inc	Sale	2,800	27.69	77,532
2006-11-21	AAON	Aaon Inc	Sale	2,200	27.85	61,270
2006-11-21	AAON	Aaon Inc	Option Exercise	2,200	5.78	12,716

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 Sheffield Kathy I (Vice President and Treasurer of Aaon Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.