Stock Trading History of Wunning Steven H

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 Wunning Steven H since year 2005. The trader's CIK number is 1171788. At the time of this reporting, Wunning Steven H is the Group President of Caterpillar Inc . (stock ticker symbol CAT). See this page for all insider trading activities at Caterpillar Inc .

Stock purchases, sales, and option exercises reported by insider *Wunning Steven H* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-04-23	CAT	Caterpillar Inc	Option Exercise	5,202	19.20	99,895
2008-04-17	CAT	Caterpillar Inc	Sale	40,000	80.00	3,200,000
2008-04-17	CAT	Caterpillar Inc	Option Exercise	40,000	19.20	768,128
2008-04-18	CAT	Caterpillar Inc	Option Exercise	2,798	19.20	53,730
2008-04-18	CAT	Caterpillar Inc	Sale	2,798	82.00	229,436
2006-01-31	CAT	Caterpillar Inc	Sale	52,122	66.93	3,488,421
2006-01-31	CAT	Caterpillar Inc	Option Exercise	58,920	29.51	1,738,611

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 Wunning Steven H (Group President of Caterpillar Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.