GEOSPACE TECHNOLOGIES CORP

Ticker: GEOS CUSIP: 37364X109 Class: Common Stock

SG Americas Securities, LLC's Holding History (CIK: 0001313360)

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

Q4 2017

Shares 12,873 Value ($000) $167 Avg Close $15.45 Range $12.09 - $18.71

Q3 2016

Shares 5,331 Value ($000) $104 Avg Close $17.28 Range $14.51 - $19.96

Q4 2014

Shares 4,133 Value ($000) $110 Avg Close $29.00 Range $24.07 - $35.32

Q3 2013

Shares 1,877 Value ($000) $158 Avg Close $74.50 Range $66.87 - $84.82

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2017	12,873	$167	$15.45	$12.09 - $18.71
Q3 2016	5,331	$104	$17.28	$14.51 - $19.96
Q4 2014	4,133	$110	$29.00	$24.07 - $35.32
Q3 2013	1,877	$158	$74.50	$66.87 - $84.82