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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
3982	Allis Chalmers Energy Inc.	ALY	Oil & Gas Field Services, Nec (1389)	390126090

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1140824	H Munawar Hidayatallah	5075 Westheimer, Suite 890 Houston TX 77056	Chairman And Ceo	Yes	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 Stock	Acquisiton	2010-04-01	228,333	$0.00	478,333	No	4	A	Direct
Common Stock	Disposition	2010-04-01	3,024	$3.72	44,226	No	4	S	Indirect	By Hidayatallah Family Trust
Common Stock	Disposition	2010-04-01	2,000	$3.72	42,226	No	4	S	Indirect	By Hidayatallah Family Trust
Common Stock	Disposition	2010-04-01	2,000	$3.75	40,226	No	4	S	Indirect	By Hidayatallah Family Trust

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	A	Direct
No	4	S	Indirect	By Hidayatallah Family Trust
No	4	S	Indirect	By Hidayatallah Family Trust
No	4	S	Indirect	By Hidayatallah Family Trust

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	8,000	Indirect	By Munawar Hidayatallah SEP IRA

Footnotes

On September 17, 2007, the Reporting Person was granted 685,000 shares of performance-based restricted stock to vest in three equal annual installments based on the satisfaction of certain performance criteria. Alternatively, all of the restricted stock may vest in 2011 if not previously vested based on the satisfaction of certain performance criteria. The performance criteria for the third tranche were met, resulting in the vesting of 228,333 shares.