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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
60849	Lufkin Industries Inc	LUFK	General Industrial Machinery & Equipment (3560)	750404410

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1421541	E Mark Crews	601 South Raguet Lufkin TX 75904	Vice 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
Common Stock	Acquisiton	2011-02-14	7,500	$27.87	7,500	No	4	M	Direct
Common Stock	Disposition	2011-02-14	7,500	$74.00	0	No	4	S	Direct
Common Stock	Acquisiton	2011-02-14	5,000	$27.64	5,000	No	4	M	Direct
Common Stock	Disposition	2011-02-14	2,250	$74.00	2,750	No	4	S	Direct
Common Stock	Disposition	2011-02-14	1,000	$74.31	1,750	No	4	S	Direct
Common Stock	Disposition	2011-02-14	750	$74.32	1,000	No	4	S	Direct
Common Stock	Disposition	2011-02-14	47	$75.05	953	No	4	S	Direct
Common Stock	Disposition	2011-02-14	300	$75.08	653	No	4	S	Direct
Common Stock	Disposition	2011-02-14	350	$75.11	303	No	4	S	Direct
Common Stock	Disposition	2011-02-14	286	$75.13	17	No	4	S	Direct
Common Stock	Disposition	2011-02-14	17	$75.14	0	No	4	S	Direct
Common Stock	Acquisiton	2011-02-14	7,000	$28.92	7,000	No	4	M	Direct
Common Stock	Disposition	2011-02-14	3,297	$75.14	3,703	No	4	S	Direct
Common Stock	Disposition	2011-02-14	1,500	$75.15	2,203	No	4	S	Direct
Common Stock	Disposition	2011-02-14	400	$75.16	1,803	No	4	S	Direct
Common Stock	Disposition	2011-02-14	300	$75.16	1,503	No	4	S	Direct
Common Stock	Disposition	2011-02-14	100	$75.18	1,403	No	4	S	Direct
Common Stock	Disposition	2011-02-14	200	$75.19	1,203	No	4	S	Direct
Common Stock	Disposition	2011-02-14	200	$75.20	1,003	No	4	S	Direct
Common Stock	Disposition	2011-02-14	1,003	$75.21	0	No	4	S	Direct

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Option to Purchase Common Stock	Disposition	2011-02-14	7,500	$27.87	7,500	$27.87
Common Stock	Option to Purchase Common Stock	Disposition	2011-02-14	5,000	$27.64	5,000	$27.64
Common Stock	Option to Purchase Common Stock	Disposition	2011-02-14	7,000	$28.92	7,000	$28.92

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
80,500	2009-01-21	2018-01-20	No	4	M	Direct
75,500	2009-11-04	2018-11-03	No	4	M	Direct
68,500	2010-11-03	2019-11-02	No	4	M	Direct

Footnotes