MASIMO CORP

Ticker: MASI CUSIP: 574795100 Class: Common Stock

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

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

Q2 2019

Shares 2,474 Value ($000) $368 Avg Close $137.22 Range $118.93 - $148.93

Q1 2019

Shares 7,641 Value ($000) $1,056 Avg Close $125.54 Range $101.87 - $139.48

Q4 2018

Shares 5,430 Value ($000) $583 Avg Close $111.51 Range $98.23 - $126.89

Q1 2018

Shares 24,548 Value ($000) $2,159 Avg Close $87.17 Range $80.69 - $96.45

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2019	2,474	$368	$137.22	$118.93 - $148.93
Q1 2019	7,641	$1,056	$125.54	$101.87 - $139.48
Q4 2018	5,430	$583	$111.51	$98.23 - $126.89
Q1 2018	24,548	$2,159	$87.17	$80.69 - $96.45