MASIMO CORP

Ticker: MASI CUSIP: 574795100 Class: Common Stock

MARSHALL WACE, LLP's Holding History (CIK: 0001318757)

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

Q4 2025

Shares 219,312 Value ($000) $28,524 Avg Close $143.19 Range $129.77 - $157.72

Q3 2025

Shares 134,122 Value ($000) $19,790 Avg Close $151.39 Range $135.34 - $172.55

Q2 2025

Shares 7,208 Value ($000) $1,213 Avg Close $159.72 Range $133.70 - $174.50

Q1 2025

Shares 10,974 Value ($000) $1,828 Avg Close $173.51 Range $159.29 - $194.88

Q4 2024

Shares 13,289 Value ($000) $2,197 Avg Close $157.91 Range $131.60 - $180.97

Q2 2024

Shares 94,798 Value ($000) $11,939 Avg Close $131.69 Range $112.85 - $147.89

Q1 2024

Shares 90,207 Value ($000) $13,247 Avg Close $129.12 Range $107.57 - $153.93

Q4 2023

Shares 189,053 Value ($000) $22,159 Avg Close $93.21 Range $75.22 - $122.60

Q2 2023

Shares 14,899 Value ($000) $2,452 Avg Close $174.09 Range $153.35 - $198.00

Q1 2023

Shares 15,932 Value ($000) $2,940 Avg Close $168.70 Range $144.51 - $184.97

Q4 2022

Shares 54,622 Value ($000) $8,081 Avg Close $137.60 Range $108.89 - $150.87

Q3 2022

Shares 31,113 Value ($000) $4,392 Avg Close $146.09 Range $122.68 - $172.74

Q2 2022

Shares 290,798 Value ($000) $37,998 Avg Close $133.79 Range $112.07 - $154.51

Q1 2022

Shares 968,094 Value ($000) $140,898 Avg Close $192.01 Range $133.94 - $291.15

Q4 2021

Shares 113 Value ($000) $32 Avg Close $284.79 Range $262.52 - $305.21

Q1 2021

Shares 3,074 Value ($000) $706 Avg Close $251.21 Range $217.65 - $284.86

Q4 2020

Shares 2,697 Value ($000) $724 Avg Close $249.38 Range $218.23 - $273.33

Q4 2019

Shares 71,470 Value ($000) $11,297 Avg Close $150.33 Range $140.16 - $160.06

Q3 2019

Shares 99,911 Value ($000) $14,866 Avg Close $151.90 Range $139.36 - $160.25

Q2 2019

Shares 185,758 Value ($000) $27,645 Avg Close $137.22 Range $118.93 - $148.93

Q1 2019

Shares 233,052 Value ($000) $32,227 Avg Close $125.54 Range $101.87 - $139.48

Q4 2018

Shares 307,636 Value ($000) $33,032 Avg Close $111.51 Range $98.23 - $126.89

Q3 2018

Shares 554,025 Value ($000) $68,998 Avg Close $110.93 Range $96.14 - $124.74

Q2 2018

Shares 185,067 Value ($000) $18,072 Avg Close $95.08 Range $83.16 - $102.32

Q1 2016

Shares 58,609 Value ($000) $2,452 Avg Close $37.61 Range $33.03 - $41.93

Q4 2014

Shares 86,337 Value ($000) $2,274 Avg Close $24.68 Range $21.03 - $27.15

Q3 2014

Shares 193,110 Value ($000) $4,109 Avg Close $22.83 Range $19.30 - $24.75

Q2 2014

Shares 26,364 Value ($000) $622 Avg Close $24.80 Range $21.45 - $28.78

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	219,312	$28,524	$143.19	$129.77 - $157.72
Q3 2025	134,122	$19,790	$151.39	$135.34 - $172.55
Q2 2025	7,208	$1,213	$159.72	$133.70 - $174.50
Q1 2025	10,974	$1,828	$173.51	$159.29 - $194.88
Q4 2024	13,289	$2,197	$157.91	$131.60 - $180.97
Q2 2024	94,798	$11,939	$131.69	$112.85 - $147.89
Q1 2024	90,207	$13,247	$129.12	$107.57 - $153.93
Q4 2023	189,053	$22,159	$93.21	$75.22 - $122.60
Q2 2023	14,899	$2,452	$174.09	$153.35 - $198.00
Q1 2023	15,932	$2,940	$168.70	$144.51 - $184.97
Q4 2022	54,622	$8,081	$137.60	$108.89 - $150.87
Q3 2022	31,113	$4,392	$146.09	$122.68 - $172.74
Q2 2022	290,798	$37,998	$133.79	$112.07 - $154.51
Q1 2022	968,094	$140,898	$192.01	$133.94 - $291.15
Q4 2021	113	$32	$284.79	$262.52 - $305.21
Q1 2021	3,074	$706	$251.21	$217.65 - $284.86
Q4 2020	2,697	$724	$249.38	$218.23 - $273.33
Q4 2019	71,470	$11,297	$150.33	$140.16 - $160.06
Q3 2019	99,911	$14,866	$151.90	$139.36 - $160.25
Q2 2019	185,758	$27,645	$137.22	$118.93 - $148.93
Q1 2019	233,052	$32,227	$125.54	$101.87 - $139.48
Q4 2018	307,636	$33,032	$111.51	$98.23 - $126.89
Q3 2018	554,025	$68,998	$110.93	$96.14 - $124.74
Q2 2018	185,067	$18,072	$95.08	$83.16 - $102.32
Q1 2016	58,609	$2,452	$37.61	$33.03 - $41.93
Q4 2014	86,337	$2,274	$24.68	$21.03 - $27.15
Q3 2014	193,110	$4,109	$22.83	$19.30 - $24.75
Q2 2014	26,364	$622	$24.80	$21.45 - $28.78