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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
18230	Caterpillar Inc	CAT	Construction Machinery & Equip (3531)	370602744

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1171788	H Steven Wunning	100 N.e. Adams Street Peoria IL 61629-7220	Group President	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common	Acquisiton	2011-02-01	54,000	$27.14	128,430	No	4	M	Direct
Common	Disposition	2011-02-01	54,000	$96.97	74,430	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common	Phantom Stock Units	Acquisiton	2011-02-01	125	$0.00	125	$0.00
Common	Employee Stock Option	Disposition	2011-02-01	54,000	$0.00	54,000	$27.14

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
22,402			No	4	A	Direct
0		2013-06-10	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common	726	Indirect	Owned by Wife
Common	1,125	Indirect	Owned by Son

Footnotes

This amount includes 24,647 shares in 401K.
Reporting person disclaims beneficial ownership.
Security converts to common stock on a one-for-one basis.
The reported phantom stock units were acquired under Caterpillar Inc.'s deferred employee investment plan and will be settled upon the reporting person's retirement or separation from service.
(Right to buy) with tandem tax withholding rights.
Exercisable in thirds - 1/3 after 1 yr.; 1/3 after 2 yrs.; 1/3 after 3 yrs.