MASIMO CORP

Ticker: MASI CUSIP: 574795100 Class: Common Stock

Alyeska Investment Group, L.P.'s Holding History (CIK: 0001453072)

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

Q4 2025

Shares 1,259,307 Value ($000) $163,785 Avg Close $143.19 Range $129.77 - $157.72

Q3 2025

Shares 1,381,085 Value ($000) $203,779 Avg Close $151.39 Range $135.34 - $172.55

Q2 2025

Shares 1,134,490 Value ($000) $190,844 Avg Close $159.72 Range $133.70 - $174.50

Q1 2025

Shares 722,534 Value ($000) $120,374 Avg Close $173.51 Range $159.29 - $194.88

Q4 2024

Shares 578,635 Value ($000) $95,648 Avg Close $157.91 Range $131.60 - $180.97

Q3 2024

Shares 745,127 Value ($000) $99,348 Avg Close $116.03 Range $101.61 - $135.78

Q2 2024

Shares 430,931 Value ($000) $54,271 Avg Close $131.69 Range $112.85 - $147.89

Q1 2024

Shares 379,419 Value ($000) $55,718 Avg Close $129.12 Range $107.57 - $153.93

Q4 2023

Shares 534,715 Value ($000) $62,674 Avg Close $93.21 Range $75.22 - $122.60

Q2 2023

Shares 204,409 Value ($000) $33,636 Avg Close $174.09 Range $153.35 - $198.00

Q1 2023

Shares 323,392 Value ($000) $59,679 Avg Close $168.70 Range $144.51 - $184.97

Q4 2022

Shares 255,797 Value ($000) $37,845 Avg Close $137.60 Range $108.89 - $150.87

Q3 2022

Shares 100,000 Value ($000) $14,116 Avg Close $146.09 Range $122.68 - $172.74

Q2 2022

Shares 331,194 Value ($000) $43,277 Avg Close $133.79 Range $112.07 - $154.51

Q1 2022

Shares 254,564 Value ($000) $37,049 Avg Close $192.01 Range $133.94 - $291.15

Q4 2021

Shares 109,135 Value ($000) $31,953 Avg Close $284.79 Range $262.52 - $305.21

Q3 2021

Shares 147,711 Value ($000) $39,987 Avg Close $271.15 Range $241.42 - $288.27

Q2 2021

Shares 1,465 Value ($000) $355 Avg Close $228.17 Range $205.10 - $250.49

Q3 2020

Shares 1,351 Value ($000) $319 Avg Close $224.17 Range $203.81 - $248.88

Q1 2020

Shares 5,006 Value ($000) $887 Avg Close $171.51 Range $143.90 - $187.85

Q4 2019

Shares 18,213 Value ($000) $2,879 Avg Close $150.33 Range $140.16 - $160.06

Q3 2019

Shares 3,889 Value ($000) $579 Avg Close $151.90 Range $139.36 - $160.25

Q3 2018

Shares 4,831 Value ($000) $602 Avg Close $110.93 Range $96.14 - $124.74

Q2 2018

Shares 224,475 Value ($000) $21,920 Avg Close $95.08 Range $83.16 - $102.32

Q1 2018

Shares 149,195 Value ($000) $13,122 Avg Close $87.17 Range $80.69 - $96.45

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	1,259,307	$163,785	$143.19	$129.77 - $157.72
Q3 2025	1,381,085	$203,779	$151.39	$135.34 - $172.55
Q2 2025	1,134,490	$190,844	$159.72	$133.70 - $174.50
Q1 2025	722,534	$120,374	$173.51	$159.29 - $194.88
Q4 2024	578,635	$95,648	$157.91	$131.60 - $180.97
Q3 2024	745,127	$99,348	$116.03	$101.61 - $135.78
Q2 2024	430,931	$54,271	$131.69	$112.85 - $147.89
Q1 2024	379,419	$55,718	$129.12	$107.57 - $153.93
Q4 2023	534,715	$62,674	$93.21	$75.22 - $122.60
Q2 2023	204,409	$33,636	$174.09	$153.35 - $198.00
Q1 2023	323,392	$59,679	$168.70	$144.51 - $184.97
Q4 2022	255,797	$37,845	$137.60	$108.89 - $150.87
Q3 2022	100,000	$14,116	$146.09	$122.68 - $172.74
Q2 2022	331,194	$43,277	$133.79	$112.07 - $154.51
Q1 2022	254,564	$37,049	$192.01	$133.94 - $291.15
Q4 2021	109,135	$31,953	$284.79	$262.52 - $305.21
Q3 2021	147,711	$39,987	$271.15	$241.42 - $288.27
Q2 2021	1,465	$355	$228.17	$205.10 - $250.49
Q3 2020	1,351	$319	$224.17	$203.81 - $248.88
Q1 2020	5,006	$887	$171.51	$143.90 - $187.85
Q4 2019	18,213	$2,879	$150.33	$140.16 - $160.06
Q3 2019	3,889	$579	$151.90	$139.36 - $160.25
Q3 2018	4,831	$602	$110.93	$96.14 - $124.74
Q2 2018	224,475	$21,920	$95.08	$83.16 - $102.32
Q1 2018	149,195	$13,122	$87.17	$80.69 - $96.45