X0304 4 2011-09-09 0001109189 BASIC ENERGY SERVICES INC BAS 0001008023 WEBSTER STEVEN A 1000 LOUISIANA SUITE 1500 SUITE 800 HOUSTON TX 77002 1 0 0 0 Common Stock 2011-09-09 4 P 0 50000 19.7503 A 476700 D Reflects the weighted average purchase price for the common stock. These shares were purchased in multiple transactions at prices ranging from $19.395 to $20.10, inclusive. The reporting person will provide upon request by the SEC staff, the issuer or any security holder of the issuer, full information regarding the number of shares purchased at each separate price. Cody Bissett, Attorney-in-Fact 2011-09-12