MASIMO CORP

Ticker: MASI CUSIP: 574795100 Class: Common Stock

CASTLEARK MANAGEMENT LLC's Holding History (CIK: 0001106832)

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

Q1 2023

Shares 35,240 Value ($000) $6,503 Avg Close $168.70 Range $144.51 - $184.97

Q1 2020

Shares 66,437 Value ($000) $11,767 Avg Close $171.51 Range $143.90 - $187.85

Q4 2019

Shares 68,957 Value ($000) $10,899 Avg Close $150.33 Range $140.16 - $160.06

Q3 2019

Shares 78,223 Value ($000) $11,639 Avg Close $151.90 Range $139.36 - $160.25

Q2 2019

Shares 84,613 Value ($000) $12,592 Avg Close $137.22 Range $118.93 - $148.93

Q1 2019

Shares 59,983 Value ($000) $8,294 Avg Close $125.54 Range $101.87 - $139.48

Q4 2018

Shares 47,975 Value ($000) $5,151 Avg Close $111.51 Range $98.23 - $126.89

Q3 2018

Shares 67,555 Value ($000) $8,413 Avg Close $110.93 Range $96.14 - $124.74

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2023	35,240	$6,503	$168.70	$144.51 - $184.97
Q1 2020	66,437	$11,767	$171.51	$143.90 - $187.85
Q4 2019	68,957	$10,899	$150.33	$140.16 - $160.06
Q3 2019	78,223	$11,639	$151.90	$139.36 - $160.25
Q2 2019	84,613	$12,592	$137.22	$118.93 - $148.93
Q1 2019	59,983	$8,294	$125.54	$101.87 - $139.48
Q4 2018	47,975	$5,151	$111.51	$98.23 - $126.89
Q3 2018	67,555	$8,413	$110.93	$96.14 - $124.74