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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
880115	Clayton Williams Energy Inc	CWEI	Crude Petroleum & Natural Gas (1311)	752396863

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1384144	Lpl/Williams Gp, Llc	6 Desta Drive, Suite 6500 Midland TX 79705		No	No	Yes	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 Stock, $.10 Par Value	Acquisiton	2010-01-29	1,520	$33.35	3,039,957	No	4	P	Indirect	See
Common Stock, $.10 Par Value	Acquisiton	2010-02-01	1,455	$34.87	3,041,412	No	4	P	Indirect	See

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	See
No	4	P	Indirect	See

Footnotes

The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $32.905 to $33.57, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnotes (1) and (2) to this Form 4.
The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $34.66 to $34.93, inclusive.
These shares are owned by The Williams Children's Partnership, Ltd. ("WCPL"). The Reporting Person is the sole general partner of WCPL and owns a 0.002% general partner interest in WCPL. Consequently, the Reporting Person has a pecuniary interest in only 0.002% of the Issuer's common stock held by WCPL and disclaims beneficial ownership of the remaining 99.998% of the Issuer's common stock held by WCPL.