GLOBAL GEOPHYSICAL SVCS INC

CUSIP: 37946S107 Class: CMN

DIMENSIONAL FUND ADVISORS LP's Holding History (CIK: 0000354204)

Note: Option positions (PUT/CALL) are excluded.

Q1 2014
Shares 766,856 Value ($000) $92 Avg Close — Range —
Q4 2013
Shares 1,482,107 Value ($000) $2,386 Avg Close — Range —
Q3 2013
Shares 1,452,637 Value ($000) $3,937 Avg Close — Range —
Q2 2013
Shares 1,372,365 Value ($000) $6,477 Avg Close — Range —