MASIMO CORP

Ticker: MASI CUSIP: 574795100 Class: Common Stock

D1 Capital Partners L.P.'s Holding History (CIK: 0001747057)

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

Q4 2021

Shares 507,397 Value ($000) $148,556 Avg Close $284.79 Range $262.52 - $305.21

Q3 2021

Shares 547,298 Value ($000) $148,159 Avg Close $271.15 Range $241.42 - $288.27

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2021	507,397	$148,556	$284.79	$262.52 - $305.21
Q3 2021	547,298	$148,159	$271.15	$241.42 - $288.27