X0202 4 2006-05-08 0000003982 Allis Chalmers Energy Inc. ALY 0001232680 WILDE DAVID 5075 WESTHEIMER, SUITE 890 HOUSTON TX 77056 0 1 0 0 President & COO Common Stock 2006-05-08 4 M 0 28800 2.75 A 33800 D Common Stock 2006-05-08 4 S 0 11700 15.90 D 22100 D Common Stock 2006-05-08 4 S 0 14800 15.95 D 7300 D Common Stock 2006-05-08 4 S 0 300 15.97 D 7000 D Common Stock 2006-05-08 4 S 0 300 16.00 D 6700 D Common Stock 2006-05-08 4 S 0 200 16.04 D 6500 D Common Stock 2006-05-08 4 S 0 300 16.07 D 6200 D Common Stock 2006-05-08 4 S 0 700 16.11 D 5500 D Common Stock 2006-05-08 4 S 0 100 16.12 D 5400 D Common Stock 2006-05-08 4 S 0 400 16.15 D 5000 D Common Stock 2006-05-09 4 M 0 9400 2.75 A 14400 D Common Stock 2006-05-09 4 S 0 6300 15.90 D 8100 D Common Stock 2006-05-09 4 S 0 500 15.95 D 7600 D Common Stock 2006-05-09 4 S 0 500 15.99 D 7100 D Common Stock 2006-05-09 4 S 0 1900 16.00 D 5200 D Common Stock 2006-05-09 4 S 0 200 16.04 D 5000 D Stock Option 2.75 2006-05-08 4 M 0 28800 0 D 2013-12-15 Common Stock 28800 71200 D Stock Option 2.75 2006-05-08 4 M 0 9400 0 D 2013-12-15 Common Stock 9400 61800 D One-third of these options became exercisable on each of December 16, 2003, 2004 and 2005. /s/ David Wilde 2006-05-10