GEOSPACE TECHNOLOGIES CORP

Ticker: GEOS CUSIP: 37364X109 Class: Common Stock

GREAT LAKES ADVISORS, LLC's Holding History (CIK: 0001078013)

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

Q3 2016

Shares 135,809 Value ($000) $2,646 Avg Close $17.28 Range $14.51 - $19.96

Q2 2016

Shares 250,586 Value ($000) $4,102 Avg Close $16.29 Range $11.82 - $19.92

Q1 2016

Shares 336,323 Value ($000) $4,150 Avg Close $11.02 Range $7.62 - $14.69

Q4 2015

Shares 363,300 Value ($000) $5,112 Avg Close $14.23 Range $10.16 - $18.91

Q3 2015

Shares 291,563 Value ($000) $4,026 Avg Close $16.62 Range $13.44 - $23.45

Q2 2015

Shares 227,980 Value ($000) $5,255 Avg Close $20.88 Range $15.59 - $26.75

Q1 2015

Shares 120,494 Value ($000) $1,989 Avg Close $20.77 Range $14.95 - $28.88

Q4 2014

Shares 90,846 Value ($000) $2,407 Avg Close $29.00 Range $24.07 - $35.32

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2016	135,809	$2,646	$17.28	$14.51 - $19.96
Q2 2016	250,586	$4,102	$16.29	$11.82 - $19.92
Q1 2016	336,323	$4,150	$11.02	$7.62 - $14.69
Q4 2015	363,300	$5,112	$14.23	$10.16 - $18.91
Q3 2015	291,563	$4,026	$16.62	$13.44 - $23.45
Q2 2015	227,980	$5,255	$20.88	$15.59 - $26.75
Q1 2015	120,494	$1,989	$20.77	$14.95 - $28.88
Q4 2014	90,846	$2,407	$29.00	$24.07 - $35.32