X0203 3 2010-04-21 0 0001311486 Global Geophysical Services Inc GGS 0001480713 Skerl Damir S C/O GLOBAL GEOPHYSICAL SERVICES, INC. 13927 SOUTH GESSNER ROAD MISSOURI CITY TX 77489 1 0 0 0 Class B Common Stock 233450 D Class B Common Stock 16667 I Christopher Robert Skerl Grandchild Trust, Damir S. Skerl, Trustee Class B Common Stock 16667 I Matthew Phillip Skerl Grandchild Trust, Damir S. Skerl, Trustee Class B Common Stock 16666 I Stephen Allen Skerl Grandchild Trust, Damir S. Skerl, Trustee Class A Convertible Preferred Stock 0 Common Stock 100000 D Class B Incentive Stock Options 15 2008-10-31 2017-10-28 Common Stock 10000 D The Convertible Preferred Stock is immediately exercisable and does not have an expiration date. As of the filing date, 50% of these shares have vested. The remainder of these shares will vest 25% on each of the following dates; October 31, 2010 and October 31, 2012. /s/ Damir S. Skerl 2010-04-21