GEOSPACE TECHNOLOGIES CORP

Ticker: GEOS CUSIP: 37364X109 Class: Common Stock

GLENMEDE TRUST CO NA's Holding History (CIK: 0000314949)

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

Q3 2014
Shares 575 Value ($000) $20 Avg Close $41.90 Range $34.01 - $55.50
Q2 2014
Shares 725 Value ($000) $39 Avg Close $56.24 Range $41.63 - $66.84
Q1 2014
Shares 733 Value ($000) $48 Avg Close $76.66 Range $60.70 - $94.82
Q4 2013
Shares 725 Value ($000) $68 Avg Close $91.95 Range $79.60 - $107.93
Q3 2013
Shares 975 Value ($000) $82 Avg Close $74.50 Range $66.87 - $84.82
Q2 2013
Shares 650 Value ($000) $44 Avg Close $83.42 Range $65.31 - $108.86
Q4 2012
Shares 2,200 Value ($000) $195 Avg Close — Range —