X0303 4 2011-06-06 0 0001311486 Global Geophysical Services Inc GGS 0001480127 Verghese P Mathew 13927 S. GESSNER RD. MISSOURI CITY TX 77489 0 1 0 0 Sr. V.P. & CFO Common Stock 27782 D Common Stock 2011-06-06 4 S 0 3000 15 D 24782 D The price reported in Column 4 reflects the weighted average price. These shares were sold by the reporting person in two transactions during the day both at $15.00 per share. The reporting person undertakes to provide to the SEC staff, GGS, and any security holder of GGS, full information regarding the number of shares sold at each separate price within the range set forth above. /s/ P. Mathew Verghese 2011-06-08