MASIMO CORP

Ticker: MASI CUSIP: 574795100 Class: Common Stock

DF DENT & CO INC's Holding History (CIK: 0000934999)

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

Q4 2025

Shares 142,626 Value ($000) $18,550 Avg Close $143.19 Range $129.77 - $157.72

Q3 2025

Shares 108,653 Value ($000) $16,032 Avg Close $151.39 Range $135.34 - $172.55

Q1 2022

Shares 41,681 Value ($000) $6,066 Avg Close $192.01 Range $133.94 - $291.15

Q4 2021

Shares 303,892 Value ($000) $88,973 Avg Close $284.79 Range $262.52 - $305.21

Q3 2021

Shares 324,155 Value ($000) $87,752 Avg Close $271.15 Range $241.42 - $288.27

Q2 2021

Shares 301,657 Value ($000) $73,137 Avg Close $228.17 Range $205.10 - $250.49

Q1 2021

Shares 201,691 Value ($000) $46,320 Avg Close $251.21 Range $217.65 - $284.86

Q4 2020

Shares 110,419 Value ($000) $29,634 Avg Close $249.38 Range $218.23 - $273.33

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	142,626	$18,550	$143.19	$129.77 - $157.72
Q3 2025	108,653	$16,032	$151.39	$135.34 - $172.55
Q1 2022	41,681	$6,066	$192.01	$133.94 - $291.15
Q4 2021	303,892	$88,973	$284.79	$262.52 - $305.21
Q3 2021	324,155	$87,752	$271.15	$241.42 - $288.27
Q2 2021	301,657	$73,137	$228.17	$205.10 - $250.49
Q1 2021	201,691	$46,320	$251.21	$217.65 - $284.86
Q4 2020	110,419	$29,634	$249.38	$218.23 - $273.33