MASIMO CORP

Ticker: MASI CUSIP: 574795100 Class: Common Stock

DIMENSIONAL FUND ADVISORS LP's Holding History (CIK: 0000354204)

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

Q4 2025

Shares 173,950 Value ($000) $22,625 Avg Close $143.19 Range $129.77 - $157.72

Q3 2025

Shares 259,668 Value ($000) $38,298 Avg Close $151.39 Range $135.34 - $172.55

Q2 2025

Shares 523,226 Value ($000) $88,020 Avg Close $159.72 Range $133.70 - $174.50

Q1 2025

Shares 703,378 Value ($000) $117,172 Avg Close $173.51 Range $159.29 - $194.88

Q4 2024

Shares 647,720 Value ($000) $107,076 Avg Close $157.91 Range $131.60 - $180.97

Q3 2024

Shares 597,698 Value ($000) $79,691 Avg Close $116.03 Range $101.61 - $135.78

Q2 2024

Shares 525,594 Value ($000) $66,201 Avg Close $131.69 Range $112.85 - $147.89

Q1 2024

Shares 360,337 Value ($000) $52,915 Avg Close $129.12 Range $107.57 - $153.93

Q4 2023

Shares 301,488 Value ($000) $35,339 Avg Close $93.21 Range $75.22 - $122.60

Q3 2023

Shares 285,446 Value ($000) $25,029 Avg Close $116.39 Range $83.03 - $164.16

Q2 2023

Shares 255,449 Value ($000) $42,036 Avg Close $174.09 Range $153.35 - $198.00

Q1 2023

Shares 237,875 Value ($000) $43,893 Avg Close $168.70 Range $144.51 - $184.97

Q4 2022

Shares 228,662 Value ($000) $34 Avg Close $137.60 Range $108.89 - $150.87

Q3 2022

Shares 225,287 Value ($000) $31,803 Avg Close $146.09 Range $122.68 - $172.74

Q2 2022

Shares 213,979 Value ($000) $27,964 Avg Close $133.79 Range $112.07 - $154.51

Q1 2022

Shares 226,526 Value ($000) $32,977 Avg Close $192.01 Range $133.94 - $291.15

Q4 2021

Shares 218,025 Value ($000) $63,838 Avg Close $284.79 Range $262.52 - $305.21

Q3 2021

Shares 218,432 Value ($000) $59,132 Avg Close $271.15 Range $241.42 - $288.27

Q2 2021

Shares 233,531 Value ($000) $56,626 Avg Close $228.17 Range $205.10 - $250.49

Q1 2021

Shares 241,249 Value ($000) $55,401 Avg Close $251.21 Range $217.65 - $284.86

Q4 2020

Shares 230,448 Value ($000) $61,847 Avg Close $249.38 Range $218.23 - $273.33

Q3 2020

Shares 241,341 Value ($000) $56,964 Avg Close $224.17 Range $203.81 - $248.88

Q2 2020

Shares 252,833 Value ($000) $57,629 Avg Close $219.47 Range $173.15 - $258.00

Q1 2020

Shares 262,917 Value ($000) $46,571 Avg Close $171.51 Range $143.90 - $187.85

Q4 2019

Shares 294,888 Value ($000) $46,611 Avg Close $150.33 Range $140.16 - $160.06

Q3 2019

Shares 311,751 Value ($000) $46,382 Avg Close $151.90 Range $139.36 - $160.25

Q2 2019

Shares 390,232 Value ($000) $58,070 Avg Close $137.22 Range $118.93 - $148.93

Q1 2019

Shares 392,919 Value ($000) $54,330 Avg Close $125.54 Range $101.87 - $139.48

Q4 2018

Shares 392,874 Value ($000) $42,181 Avg Close $111.51 Range $98.23 - $126.89

Q3 2018

Shares 409,226 Value ($000) $50,963 Avg Close $110.93 Range $96.14 - $124.74

Q2 2018

Shares 417,575 Value ($000) $40,778 Avg Close $95.08 Range $83.16 - $102.32

Q1 2018

Shares 484,138 Value ($000) $42,580 Avg Close $87.17 Range $80.69 - $96.45

Q4 2017

Shares 509,580 Value ($000) $43,214 Avg Close $86.74 Range $84.05 - $91.04

Q3 2017

Shares 626,931 Value ($000) $54,264 Avg Close $88.42 Range $81.01 - $100.00

Q2 2017

Shares 702,146 Value ($000) $64,022 Avg Close $91.81 Range $82.71 - $104.71

Q1 2017

Shares 1,093,205 Value ($000) $101,953 Avg Close $82.32 Range $66.79 - $96.68

Q4 2016

Shares 1,136,399 Value ($000) $76,594 Avg Close $61.46 Range $53.78 - $68.88

Q3 2016

Shares 1,148,356 Value ($000) $68,314 Avg Close $56.42 Range $51.10 - $60.52

Q2 2016

Shares 1,132,794 Value ($000) $59,487 Avg Close $47.10 Range $41.19 - $53.55

Q1 2016

Shares 1,171,280 Value ($000) $49,004 Avg Close $37.61 Range $33.03 - $41.93

Q4 2015

Shares 1,351,212 Value ($000) $56,090 Avg Close $40.86 Range $37.40 - $43.76

Q3 2015

Shares 1,274,363 Value ($000) $49,138 Avg Close $40.86 Range $35.33 - $46.00

Q2 2015

Shares 1,242,331 Value ($000) $48,128 Avg Close $35.83 Range $32.33 - $39.91

Q1 2015

Shares 1,165,638 Value ($000) $38,442 Avg Close $28.75 Range $25.12 - $33.16

Q4 2014

Shares 1,073,670 Value ($000) $28,281 Avg Close $24.68 Range $21.03 - $27.15

Q3 2014

Shares 964,113 Value ($000) $20,516 Avg Close $22.83 Range $19.30 - $24.75

Q2 2014

Shares 916,096 Value ($000) $21,620 Avg Close $24.80 Range $21.45 - $28.78

Q1 2014

Shares 793,073 Value ($000) $21,658 Avg Close $28.52 Range $25.08 - $32.20

Q4 2013

Shares 709,039 Value ($000) $20,725 Avg Close $27.99 Range $25.42 - $29.66

Q3 2013

Shares 648,756 Value ($000) $17,283 Avg Close $24.65 Range $21.21 - $27.17

Q2 2013

Shares 555,347 Value ($000) $11,774 Avg Close $21.04 Range $19.03 - $22.70

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	173,950	$22,625	$143.19	$129.77 - $157.72
Q3 2025	259,668	$38,298	$151.39	$135.34 - $172.55
Q2 2025	523,226	$88,020	$159.72	$133.70 - $174.50
Q1 2025	703,378	$117,172	$173.51	$159.29 - $194.88
Q4 2024	647,720	$107,076	$157.91	$131.60 - $180.97
Q3 2024	597,698	$79,691	$116.03	$101.61 - $135.78
Q2 2024	525,594	$66,201	$131.69	$112.85 - $147.89
Q1 2024	360,337	$52,915	$129.12	$107.57 - $153.93
Q4 2023	301,488	$35,339	$93.21	$75.22 - $122.60
Q3 2023	285,446	$25,029	$116.39	$83.03 - $164.16
Q2 2023	255,449	$42,036	$174.09	$153.35 - $198.00
Q1 2023	237,875	$43,893	$168.70	$144.51 - $184.97
Q4 2022	228,662	$34	$137.60	$108.89 - $150.87
Q3 2022	225,287	$31,803	$146.09	$122.68 - $172.74
Q2 2022	213,979	$27,964	$133.79	$112.07 - $154.51
Q1 2022	226,526	$32,977	$192.01	$133.94 - $291.15
Q4 2021	218,025	$63,838	$284.79	$262.52 - $305.21
Q3 2021	218,432	$59,132	$271.15	$241.42 - $288.27
Q2 2021	233,531	$56,626	$228.17	$205.10 - $250.49
Q1 2021	241,249	$55,401	$251.21	$217.65 - $284.86
Q4 2020	230,448	$61,847	$249.38	$218.23 - $273.33
Q3 2020	241,341	$56,964	$224.17	$203.81 - $248.88
Q2 2020	252,833	$57,629	$219.47	$173.15 - $258.00
Q1 2020	262,917	$46,571	$171.51	$143.90 - $187.85
Q4 2019	294,888	$46,611	$150.33	$140.16 - $160.06
Q3 2019	311,751	$46,382	$151.90	$139.36 - $160.25
Q2 2019	390,232	$58,070	$137.22	$118.93 - $148.93
Q1 2019	392,919	$54,330	$125.54	$101.87 - $139.48
Q4 2018	392,874	$42,181	$111.51	$98.23 - $126.89
Q3 2018	409,226	$50,963	$110.93	$96.14 - $124.74
Q2 2018	417,575	$40,778	$95.08	$83.16 - $102.32
Q1 2018	484,138	$42,580	$87.17	$80.69 - $96.45
Q4 2017	509,580	$43,214	$86.74	$84.05 - $91.04
Q3 2017	626,931	$54,264	$88.42	$81.01 - $100.00
Q2 2017	702,146	$64,022	$91.81	$82.71 - $104.71
Q1 2017	1,093,205	$101,953	$82.32	$66.79 - $96.68
Q4 2016	1,136,399	$76,594	$61.46	$53.78 - $68.88
Q3 2016	1,148,356	$68,314	$56.42	$51.10 - $60.52
Q2 2016	1,132,794	$59,487	$47.10	$41.19 - $53.55
Q1 2016	1,171,280	$49,004	$37.61	$33.03 - $41.93
Q4 2015	1,351,212	$56,090	$40.86	$37.40 - $43.76
Q3 2015	1,274,363	$49,138	$40.86	$35.33 - $46.00
Q2 2015	1,242,331	$48,128	$35.83	$32.33 - $39.91
Q1 2015	1,165,638	$38,442	$28.75	$25.12 - $33.16
Q4 2014	1,073,670	$28,281	$24.68	$21.03 - $27.15
Q3 2014	964,113	$20,516	$22.83	$19.30 - $24.75
Q2 2014	916,096	$21,620	$24.80	$21.45 - $28.78
Q1 2014	793,073	$21,658	$28.52	$25.08 - $32.20
Q4 2013	709,039	$20,725	$27.99	$25.42 - $29.66
Q3 2013	648,756	$17,283	$24.65	$21.21 - $27.17
Q2 2013	555,347	$11,774	$21.04	$19.03 - $22.70