QUALYS INC

Ticker: QLYS CUSIP: 74758T303 Class: COM

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

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

Q4 2020

Shares 2,100 Value ($000) $256 Avg Close $98.93 Range $86.65 - $126.30

Q3 2019

Shares 18,400 Value ($000) $1,391 Avg Close $83.33 Range $72.76 - $92.19

Q2 2019

Shares 18,900 Value ($000) $1,646 Avg Close $86.26 Range $78.10 - $95.99

Q4 2018

Shares 7,400 Value ($000) $553 Avg Close $75.36 Range $65.94 - $89.35

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2020	2,100	$256	$98.93	$86.65 - $126.30
Q3 2019	18,400	$1,391	$83.33	$72.76 - $92.19
Q2 2019	18,900	$1,646	$86.26	$78.10 - $95.99
Q4 2018	7,400	$553	$75.36	$65.94 - $89.35