GLAUKOS CORP

Ticker: GKOS CUSIP: 377322102 Class: EQTY

Madison Asset Management, LLC's Holding History (CIK: 0001299351)

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

Q2 2021

Shares 21,021 Value ($000) $1,783 Avg Close $82.12 Range $71.47 - $98.28

Q1 2021

Shares 41,764 Value ($000) $3,505 Avg Close $87.94 Range $69.89 - $99.00

Q4 2020

Shares 67,054 Value ($000) $5,046 Avg Close $63.20 Range $48.68 - $76.20

Q3 2020

Shares 63,341 Value ($000) $3,137 Avg Close $43.94 Range $35.65 - $52.03

Q2 2020

Shares 74,546 Value ($000) $2,864 Avg Close $37.23 Range $27.58 - $47.82

Q1 2020

Shares 27,892 Value ($000) $861 Avg Close $51.30 Range $23.31 - $70.96

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2021	21,021	$1,783	$82.12	$71.47 - $98.28
Q1 2021	41,764	$3,505	$87.94	$69.89 - $99.00
Q4 2020	67,054	$5,046	$63.20	$48.68 - $76.20
Q3 2020	63,341	$3,137	$43.94	$35.65 - $52.03
Q2 2020	74,546	$2,864	$37.23	$27.58 - $47.82
Q1 2020	27,892	$861	$51.30	$23.31 - $70.96