X0303 4 2009-06-04 0 0001340041 Complete Production Services, Inc. CPX 0001316481 Hamm Harold 11700 KATY FREEWAY, SUITE 300 HOUSTON TX 77079 1 0 0 0 Common Stock 2009-06-04 4 P 0 95046 7.6951 A 408946 D Common Stock 2009-06-05 4 P 0 35000 7.6786 A 443946 D Common Stock 3954621 I By Harold G. Hamm GRAT 4, Harold G. Hamm GRAT 6 and Harold G. Hamm GRAT 8. Common Stock 154355 I By Harold G. Hamm Revocable Inter Vivos Trust. The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $7.61 to $7.75, inclusive. The reporting person undertakes to provide to 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 Footnote 1 to this Form 4. The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $7.65 to $7.75, inclusive. The reporting person undertakes to provide to 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 Footnote 1 to this Form 4. The reporting person is the trustee of each of Harold G. Hamm GRAT 4, Harold G. Hamm GRAT 6 and Harold G. Hamm GRAT 8. The reporting person is the trustee of the Harold G. Hamm Revocable Inter Vivos Trust, as amended and restated, dated April 23, 1984. /s/ James F. Maroney, III, Attorney-in-Fact for Harold G. Hamm 2009-06-08