Stock Trading History of Oberhelman Douglas R

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 Oberhelman Douglas R since year 2005. The trader's CIK number is 1171770. At the time of this reporting, Oberhelman Douglas R 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 *Oberhelman Douglas R* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-04-28	CAT	Caterpillar Inc	Option Exercise	19,410	27.84	540,448
2007-11-29	CAT	Caterpillar Inc	Option Exercise	22,590	27.84	628,991
2007-06-01	CAT	Caterpillar Inc	Option Exercise	18,132	25.83	468,315
2007-05-14	CAT	Caterpillar Inc	Option Exercise	20,000	25.83	516,562
2006-12-21	CAT	Caterpillar Inc	Option Exercise	3,868	25.83	99,903
2006-02-06	CAT	Caterpillar Inc	Option Exercise	11,974	16.45	197,008

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 Oberhelman Douglas R (Group President of Caterpillar Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.