<SEC-DOCUMENT>0000937556-19-000085-index.html : 20190506
<SEC-HEADER>0000937556-19-000085.hdr.sgml : 20190506
<ACCEPTANCE-DATETIME>20190506160928
ACCESSION NUMBER:		0000937556-19-000085
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		37
CONFORMED PERIOD OF REPORT:	20190506
ITEM INFORMATION:		Results of Operations and Financial Condition
ITEM INFORMATION:		Regulation FD Disclosure
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20190506
DATE AS OF CHANGE:		20190506

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:			1228

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33642
		FILM NUMBER:		19799372

	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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<FILENAME>masi-20190506x8k.htm
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Document 1 - file: masi-20190506x8k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>masi-20190506xex991.htm
<DESCRIPTION>EXHIBIT 99.1
<TEXT>
Document 2 - file: masi-20190506xex991.htm

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<DOCUMENT>
<TYPE>EX-99.2
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<FILENAME>masimoq12019supplementalpres.htm
<DESCRIPTION>EXHIBIT 99.2
<TEXT>
Document 3 - file: masimoq12019supplementalpres.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.3
<SEQUENCE>4
<FILENAME>masimq119onongaapsupplem.htm
<DESCRIPTION>EXHIBIT 99.3
<TEXT>
Document 4 - file: masimq119onongaapsupplem.htm

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<FILENAME>masimonongaapdefinitions.htm
<DESCRIPTION>EXHIBIT 99.4
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Document 5 - file: masimonongaapdefinitions.htm

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<FILENAME>masimologoq12019a.jpg
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Document 6 - file: masimologoq12019a.jpg

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<FILENAME>masimologoq12019b.jpg
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Document 7 - file: masimologoq12019b.jpg

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<FILENAME>masimonongaapdefinitions001.jpg
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Document 8 - file: masimonongaapdefinitions001.jpg

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<FILENAME>masimonongaapdefinitions002.jpg
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Document 9 - file: masimonongaapdefinitions002.jpg

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Document 10 - file: masimonongaapdefinitions003.jpg

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<FILENAME>masimonongaapdefinitions004.jpg
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Document 11 - file: masimonongaapdefinitions004.jpg

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Document 12 - file: masimonongaapdefinitions005.jpg

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<FILENAME>masimonongaapdefinitions006.jpg
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Document 13 - file: masimonongaapdefinitions006.jpg

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<FILENAME>masimonongaapdefinitions007.jpg
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Document 14 - file: masimonongaapdefinitions007.jpg

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<FILENAME>masimonongaapdefinitions008.jpg
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Document 15 - file: masimonongaapdefinitions008.jpg

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<FILENAME>masimonongaapdefinitions009.jpg
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Document 16 - file: masimonongaapdefinitions009.jpg

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<FILENAME>masimoq12019supplemental001.jpg
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Document 17 - file: masimoq12019supplemental001.jpg

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<FILENAME>masimoq12019supplemental002.jpg
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Document 18 - file: masimoq12019supplemental002.jpg

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<FILENAME>masimoq12019supplemental003.jpg
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Document 19 - file: masimoq12019supplemental003.jpg

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<FILENAME>masimoq12019supplemental004.jpg
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Document 20 - file: masimoq12019supplemental004.jpg

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<FILENAME>masimoq12019supplemental005.jpg
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Document 21 - file: masimoq12019supplemental005.jpg

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<FILENAME>masimoq12019supplemental006.jpg
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Document 22 - file: masimoq12019supplemental006.jpg

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<FILENAME>masimoq12019supplemental007.jpg
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Document 23 - file: masimoq12019supplemental007.jpg

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<FILENAME>masimoq12019supplemental008.jpg
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Document 24 - file: masimoq12019supplemental008.jpg

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<FILENAME>masimoq12019supplemental009.jpg
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Document 25 - file: masimoq12019supplemental009.jpg

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<SEQUENCE>26
<FILENAME>masimoq12019supplemental010.jpg
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Document 26 - file: masimoq12019supplemental010.jpg

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<FILENAME>masimoq12019supplemental011.jpg
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Document 27 - file: masimoq12019supplemental011.jpg

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<FILENAME>masimoq12019supplemental012.jpg
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Document 28 - file: masimoq12019supplemental012.jpg

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<FILENAME>masimoq12019supplemental013.jpg
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Document 29 - file: masimoq12019supplemental013.jpg

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<FILENAME>masimoq12019supplemental014.jpg
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Document 30 - file: masimoq12019supplemental014.jpg

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<SEQUENCE>31
<FILENAME>masimoq12019supplemental015.jpg
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Document 31 - file: masimoq12019supplemental015.jpg

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<TYPE>GRAPHIC
<SEQUENCE>32
<FILENAME>masimoq12019supplemental016.jpg
<TEXT>
Document 32 - file: masimoq12019supplemental016.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>33
<FILENAME>masimoq12019supplemental017.jpg
<TEXT>
Document 33 - file: masimoq12019supplemental017.jpg

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<FILENAME>masimq119onongaapsupplem001.jpg
<TEXT>
Document 34 - file: masimq119onongaapsupplem001.jpg

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<FILENAME>masimq119onongaapsupplem002.jpg
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Document 35 - file: masimq119onongaapsupplem002.jpg

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<SEQUENCE>36
<FILENAME>masimq119onongaapsupplem003.jpg
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Document 36 - file: masimq119onongaapsupplem003.jpg

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<FILENAME>masimq119onongaapsupplem004.jpg
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Document 37 - file: masimq119onongaapsupplem004.jpg

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