GLAUKOS CORP

Ticker: GKOS CUSIP: 377322102 Class: EQTY

OBERWEIS ASSET MANAGEMENT INC/'s Holding History (CIK: 0000937886)

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

Q2 2017

Shares 208,930 Value ($000) $8,664 Avg Close $43.08 Range $36.51 - $52.48

Q1 2017

Shares 188,330 Value ($000) $9,661 Avg Close $43.59 Range $33.18 - $52.49

Q4 2016

Shares 186,400 Value ($000) $6,394 Avg Close $34.23 Range $28.72 - $39.02

Q3 2016

Shares 116,060 Value ($000) $4,380 Avg Close $33.09 Range $28.26 - $39.82

Q2 2016

Shares 33,600 Value ($000) $980 Avg Close $23.15 Range $16.26 - $30.01

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2017	208,930	$8,664	$43.08	$36.51 - $52.48
Q1 2017	188,330	$9,661	$43.59	$33.18 - $52.49
Q4 2016	186,400	$6,394	$34.23	$28.72 - $39.02
Q3 2016	116,060	$4,380	$33.09	$28.26 - $39.82
Q2 2016	33,600	$980	$23.15	$16.26 - $30.01