<SEC-DOCUMENT>0000937556-18-000157-index.html : 20181031
<SEC-HEADER>0000937556-18-000157.hdr.sgml : 20181031
<ACCEPTANCE-DATETIME>20181031160819
ACCESSION NUMBER:		0000937556-18-000157
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		19
CONFORMED PERIOD OF REPORT:	20181031
ITEM INFORMATION:		Results of Operations and Financial Condition
ITEM INFORMATION:		Regulation FD Disclosure
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20181031
DATE AS OF CHANGE:		20181031

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:			1229

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33642
		FILM NUMBER:		181150389

	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>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>masi-20181031x8k.htm
<DESCRIPTION>8-K
<TEXT>
Document 1 - file: masi-20181031x8k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>masi-20181031xex991.htm
<DESCRIPTION>EXHIBIT 99.1
<TEXT>
Document 2 - file: masi-20181031xex991.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.2
<SEQUENCE>3
<FILENAME>q32018supplementalearnin.htm
<DESCRIPTION>EXHIBIT 99.2
<TEXT>
Document 3 - file: q32018supplementalearnin.htm

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

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>investorrelationsnongaap001.jpg
<TEXT>
Document 5 - file: investorrelationsnongaap001.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>masimologoq32018c.jpg
<TEXT>
Document 6 - file: masimologoq32018c.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>masimologoq32018d.jpg
<TEXT>
Document 7 - file: masimologoq32018d.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>q32018supplementalearnin001.jpg
<TEXT>
Document 8 - file: q32018supplementalearnin001.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>q32018supplementalearnin002.jpg
<TEXT>
Document 9 - file: q32018supplementalearnin002.jpg

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<SEQUENCE>10
<FILENAME>q32018supplementalearnin003.jpg
<TEXT>
Document 10 - file: q32018supplementalearnin003.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>q32018supplementalearnin004.jpg
<TEXT>
Document 11 - file: q32018supplementalearnin004.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>q32018supplementalearnin005.jpg
<TEXT>
Document 12 - file: q32018supplementalearnin005.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>q32018supplementalearnin006.jpg
<TEXT>
Document 13 - file: q32018supplementalearnin006.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>14
<FILENAME>q32018supplementalearnin007.jpg
<TEXT>
Document 14 - file: q32018supplementalearnin007.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>15
<FILENAME>q32018supplementalearnin008.jpg
<TEXT>
Document 15 - file: q32018supplementalearnin008.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>16
<FILENAME>q32018supplementalearnin009.jpg
<TEXT>
Document 16 - file: q32018supplementalearnin009.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>17
<FILENAME>q32018supplementalearnin010.jpg
<TEXT>
Document 17 - file: q32018supplementalearnin010.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>18
<FILENAME>q32018supplementalearnin011.jpg
<TEXT>
Document 18 - file: q32018supplementalearnin011.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>19
<FILENAME>q32018supplementalearnin012.jpg
<TEXT>
Document 19 - file: q32018supplementalearnin012.jpg

</DOCUMENT>
</SEC-DOCUMENT>