MASIMO CORP

Ticker: MASI CUSIP: 574795100 Class: Common Stock

ADAGE CAPITAL PARTNERS GP, L.L.C.'s Holding History (CIK: 0001165408)

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

Q3 2025

Shares 150,000 Value ($000) $22,133 Avg Close $151.39 Range $135.34 - $172.55

Q4 2021

Shares 80,000 Value ($000) $23,422 Avg Close $284.79 Range $262.52 - $305.21

Q3 2014

Shares 250,000 Value ($000) $5,320 Avg Close $22.83 Range $19.30 - $24.75

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2025	150,000	$22,133	$151.39	$135.34 - $172.55
Q4 2021	80,000	$23,422	$284.79	$262.52 - $305.21
Q3 2014	250,000	$5,320	$22.83	$19.30 - $24.75