MASIMO CORP

Ticker: MASI CUSIP: 574795100 Class: Common Stock

GREAT LAKES ADVISORS, LLC's Holding History (CIK: 0001078013)

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

Q3 2025

Shares 1,377 Value ($000) $203 Avg Close $151.39 Range $135.34 - $172.55

Q2 2025

Shares 82,348 Value ($000) $13,853 Avg Close $159.72 Range $133.70 - $174.50

Q1 2025

Shares 92,872 Value ($000) $15,472 Avg Close $173.51 Range $159.29 - $194.88

Q4 2024

Shares 95,730 Value ($000) $15,824 Avg Close $157.91 Range $131.60 - $180.97

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2025	1,377	$203	$151.39	$135.34 - $172.55
Q2 2025	82,348	$13,853	$159.72	$133.70 - $174.50
Q1 2025	92,872	$15,472	$173.51	$159.29 - $194.88
Q4 2024	95,730	$15,824	$157.91	$131.60 - $180.97