PTEN: Historical Prices for Patterson-UTI Energy, Inc.

Date	Open	High	Low	Close	Volume	Adj Close*
20-Nov-09	15.11	15.24	14.66	14.95	5,573,000	14.95
19-Nov-09	15.81	15.88	15.16	15.27	5,174,400	15.27
18-Nov-09	16.43	16.48	15.89	15.99	4,023,100	15.99
17-Nov-09	16.47	16.47	16.06	16.38	3,964,000	16.38
16-Nov-09	16.07	16.62	16.02	16.52	5,217,200	16.52
13-Nov-09	16.11	16.19	15.77	15.96	4,388,700	15.96
12-Nov-09	16.54	16.74	15.78	15.93	5,221,800	15.93
11-Nov-09	16.44	16.75	16.35	16.63	5,462,200	16.63
10-Nov-09	16.29	16.47	15.87	16.28	3,129,700	16.28
9-Nov-09	15.87	16.47	15.87	16.45	5,431,600	16.45
6-Nov-09	15.88	16.14	15.58	15.78	2,953,400	15.78
5-Nov-09	15.99	16.10	15.64	16.07	4,111,400	16.07
4-Nov-09	16.13	16.13	15.65	15.74	6,389,300	15.74
3-Nov-09	15.45	16.00	15.11	15.85	6,151,600	15.85
2-Nov-09	15.70	16.08	15.23	15.64	5,409,600	15.64
30-Oct-09	16.91	16.99	15.45	15.58	9,607,200	15.58
29-Oct-09	16.08	17.62	16.00	16.74	13,367,900	16.74
28-Oct-09	16.27	16.27	15.34	15.62	7,845,000	15.62
27-Oct-09	16.33	16.69	15.96	16.33	5,687,800	16.33
26-Oct-09	17.00	17.58	16.23	16.30	4,886,300	16.30
23-Oct-09	17.77	17.81	16.83	17.00	3,486,500	17.00
22-Oct-09	17.34	17.77	16.94	17.70	4,679,700	17.70
21-Oct-09	17.05	18.07	16.91	17.40	7,242,900	17.40
20-Oct-09	17.53	17.53	16.78	17.16	3,992,400	17.16
19-Oct-09	17.27	17.54	16.98	17.44	2,758,800	17.44
16-Oct-09	17.32	17.53	16.98	17.19	3,647,800	17.19
15-Oct-09	16.75	17.74	16.60	17.50	8,154,800	17.50
14-Oct-09	16.91	17.11	16.68	16.78	4,243,600	16.78
13-Oct-09	16.67	16.79	16.08	16.66	5,805,200	16.66
12-Oct-09	16.76	17.33	16.51	16.64	6,057,300	16.64
9-Oct-09	16.51	16.58	16.16	16.55	3,672,600	16.55
8-Oct-09	15.71	16.66	15.65	16.60	7,317,700	16.60
7-Oct-09	15.52	15.79	15.35	15.55	3,121,500	15.55
6-Oct-09	15.39	15.81	15.29	15.71	5,292,800	15.71
5-Oct-09	14.60	15.29	14.43	15.11	4,779,800	15.11
2-Oct-09	14.41	14.75	14.25	14.47	4,290,600	14.47
1-Oct-09	15.37	15.50	14.61	14.63	5,120,600	14.63
30-Sep-09	15.04	15.43	14.86	15.10	5,654,600	15.10
29-Sep-09	14.63	15.07	14.48	14.99	4,590,300	14.99
28-Sep-09	14.25	14.77	14.10	14.63	2,356,900	14.63
25-Sep-09	14.13	14.49	13.92	14.16	2,328,700	14.16
24-Sep-09	14.76	14.89	14.07	14.17	3,436,000	14.17
23-Sep-09	15.13	15.24	14.62	14.81	3,315,600	14.81
22-Sep-09	15.20	15.21	14.87	15.09	2,962,000	15.09
21-Sep-09	14.70	14.89	14.45	14.81	4,023,200	14.81
18-Sep-09	15.26	15.59	14.92	15.04	4,498,100	15.04
17-Sep-09	15.55	15.91	15.24	15.31	5,150,900	15.31
16-Sep-09	15.00	15.98	14.99	15.95	7,601,500	15.95
15-Sep-09	14.82	15.04	14.61	15.00	3,226,800	15.00
14-Sep-09	14.32	14.81	14.25	14.78	2,075,200	14.78
11-Sep-09	14.68	14.93	14.25	14.56	4,262,600	14.56
11-Sep-09	$ 0.05 Dividend
10-Sep-09	14.39	14.70	14.25	14.66	2,129,700	14.61
9-Sep-09	14.30	14.53	14.08	14.41	3,676,800	14.36
8-Sep-09	13.82	14.27	13.82	14.22	5,203,400	14.17
4-Sep-09	13.11	13.59	13.02	13.53	2,493,800	13.48
3-Sep-09	13.03	13.21	12.93	13.14	2,200,100	13.10
2-Sep-09	13.11	13.25	12.88	12.89	2,538,500	12.85
1-Sep-09	13.25	13.76	13.12	13.17	5,494,100	13.13
31-Aug-09	13.50	13.56	13.10	13.29	5,173,500	13.24
28-Aug-09	13.79	13.99	13.57	13.72	3,951,600	13.67
27-Aug-09	13.76	13.76	13.09	13.65	5,802,800	13.60
26-Aug-09	14.28	14.33	13.88	13.98	4,865,700	13.93
25-Aug-09	15.08	15.08	14.39	14.43	3,244,200	14.38
24-Aug-09	14.79	15.12	14.70	14.93	3,739,900	14.88
21-Aug-09	14.17	14.73	14.01	14.68	3,602,500	14.63
20-Aug-09	13.92	14.16	13.81	14.07	3,379,400	14.02
* Close price adjusted for dividends and splits.

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