GEOSPACE TECHNOLOGIES CORP

Ticker: GEOS CUSIP: 37364X109 Class: Common Stock

BROWN BROTHERS HARRIMAN & CO's Holding History (CIK: 0000014661)

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

Q4 2016

Shares 104 Value ($000) $2 Avg Close $20.24 Range $16.77 - $23.20

Q3 2016

Shares 104 Value ($000) $2 Avg Close $17.28 Range $14.51 - $19.96

Q2 2016

Shares 104 Value ($000) $2 Avg Close $16.29 Range $11.82 - $19.92

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2016	104	$2	$20.24	$16.77 - $23.20
Q3 2016	104	$2	$17.28	$14.51 - $19.96
Q2 2016	104	$2	$16.29	$11.82 - $19.92