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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
1200312	G Mel Riggs	6 Desta Drive, Suite 6500 Midland TX 79705	Executive Vice President & Coo	Yes	Yes	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	2011-05-11	1,000	$75.00	8,888	No	4	P	Direct

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

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock, $.10 Par Value	3,044,144	Indirect	See

Footnotes

This amount includes 3,041,412 shares owned by The Williams Children's Partnership, Ltd. ("WCPL"), a family limited partnership in which the five adult children of Clayton W. Williams, Jr., the Chairman of the Board and Chief Executive Officer of the Issuer, are limited partners, LPL/Williams GP, LLC ("LPL/Williams") is the sole general partner of WCPL and the Reporting Person is the sole member of LPL/Williams. As the sole member of LPL/Williams, 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. This amount also includes 1,382 shares in which the Reporting person holds a power of attorney and 1,350 shares held in the Company's 401(k) Plan and Trust, of which 116 shares have been acquired since 12/14/10.