GLAUKOS CORP

Ticker: GKOS CUSIP: 377322102 Class: EQTY

MACKAY SHIELDS LLC's Holding History (CIK: 0000061227)

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

Q1 2021

Shares 3,500 Value ($000) $294 Avg Close $87.94 Range $69.89 - $99.00

Q4 2020

Shares 3,700 Value ($000) $279 Avg Close $63.20 Range $48.68 - $76.20

Q2 2020

Shares 7,100 Value ($000) $273 Avg Close $37.23 Range $27.58 - $47.82

Q2 2019

Shares 13,400 Value ($000) $1,010 Avg Close $71.75 Range $63.00 - $80.32

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2021	3,500	$294	$87.94	$69.89 - $99.00
Q4 2020	3,700	$279	$63.20	$48.68 - $76.20
Q2 2020	7,100	$273	$37.23	$27.58 - $47.82
Q2 2019	13,400	$1,010	$71.75	$63.00 - $80.32