GEOSPACE TECHNOLOGIES CORP

Ticker: GEOS CUSIP: 37364X109 Class: Common Stock

Campbell & CO Investment Adviser LLC's Holding History (CIK: 0001353570)

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

Q1 2015

Shares 18,773 Value ($000) $310 Avg Close $20.77 Range $14.95 - $28.88

Q4 2014

Shares 8,452 Value ($000) $224 Avg Close $29.00 Range $24.07 - $35.32

Q2 2013

Shares 45,559 Value ($000) $3,147 Avg Close $83.42 Range $65.31 - $108.86

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2015	18,773	$310	$20.77	$14.95 - $28.88
Q4 2014	8,452	$224	$29.00	$24.07 - $35.32
Q2 2013	45,559	$3,147	$83.42	$65.31 - $108.86