<SEC-DOCUMENT>0000937556-23-000132-index.html : 20230602
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<ACCEPTANCE-DATETIME>20230602090018
ACCESSION NUMBER:		0000937556-23-000132
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		18
FILED AS OF DATE:		20230602
DATE AS OF CHANGE:		20230602

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MASIMO CORP
		CENTRAL INDEX KEY:			0000937556
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS [3845]
		IRS NUMBER:				330368882
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33642
		FILM NUMBER:		23986873

	BUSINESS ADDRESS:	
		STREET 1:		52 DISCOVERY
		CITY:			IRVINE
		STATE:			CA
		ZIP:			92618
		BUSINESS PHONE:		949-297-7000

	MAIL ADDRESS:	
		STREET 1:		52 DISCOVERY
		CITY:			IRVINE
		STATE:			CA
		ZIP:			92618
</SEC-HEADER>
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<TYPE>DEFA14A
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<FILENAME>masi-202300602xdefa14aa2.htm
<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: masi-202300602xdefa14aa2.htm

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<FILENAME>masimologo300x1a05.jpg
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Document 2 - file: masimologo300x1a05.jpg

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<FILENAME>capture1a.jpg
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<TEXT>
Document 3 - file: capture1a.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>capture2a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: capture2a.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>capture3a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: capture3a.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>capture4a.jpg
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<TEXT>
Document 6 - file: capture4a.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>capture5a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: capture5a.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>capture6a.jpg
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<TEXT>
Document 8 - file: capture6a.jpg

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<DOCUMENT>
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<SEQUENCE>9
<FILENAME>capture7a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 9 - file: capture7a.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>capture8a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 10 - file: capture8a.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>capture9a.jpg
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<TEXT>
Document 11 - file: capture9a.jpg

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<FILENAME>capture10a.jpg
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Document 12 - file: capture10a.jpg

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<SEQUENCE>13
<FILENAME>capture11a.jpg
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<TEXT>
Document 13 - file: capture11a.jpg

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<SEQUENCE>14
<FILENAME>capture12a.jpg
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<TEXT>
Document 14 - file: capture12a.jpg

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<TYPE>GRAPHIC
<SEQUENCE>15
<FILENAME>capture13a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 15 - file: capture13a.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>16
<FILENAME>capture14a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 16 - file: capture14a.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>17
<FILENAME>capture15a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 17 - file: capture15a.jpg

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<TYPE>GRAPHIC
<SEQUENCE>18
<FILENAME>capture16a.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 18 - file: capture16a.jpg

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