<SEC-DOCUMENT>0000937556-18-000059-index.html : 20180420
<SEC-HEADER>0000937556-18-000059.hdr.sgml : 20180420
<ACCEPTANCE-DATETIME>20180419213543
ACCESSION NUMBER:		0000937556-18-000059
CONFORMED SUBMISSION TYPE:	DEF 14A
PUBLIC DOCUMENT COUNT:		27
CONFORMED PERIOD OF REPORT:	20171230
FILED AS OF DATE:		20180420
DATE AS OF CHANGE:		20180419
EFFECTIVENESS DATE:		20180420

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:		DEF 14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33642
		FILM NUMBER:		18764934

	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>DEF 14A
<SEQUENCE>1
<FILENAME>masi-20180419xdef14a.htm
<DESCRIPTION>DEF 14A
<TEXT>
Document 1 - file: masi-20180419xdef14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>annualmtginfoa03.jpg
<TEXT>
Document 2 - file: annualmtginfoa03.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>annualreport2018proxycover85.jpg
<TEXT>
Document 3 - file: annualreport2018proxycover85.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>barcodex2a03.jpg
<TEXT>
Document 4 - file: barcodex2a03.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>barcodex5a03.jpg
<TEXT>
Document 5 - file: barcodex5a03.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>calculatora03.jpg
<TEXT>
Document 6 - file: calculatora03.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>chart-0bd1b91db3db6eae135a24.jpg
<TEXT>
Document 7 - file: chart-0bd1b91db3db6eae135a24.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>chart-6f635af2dc40640a7e1a24.jpg
<TEXT>
Document 8 - file: chart-6f635af2dc40640a7e1a24.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>chart-08e2dd2c731205b7bbba24.jpg
<TEXT>
Document 9 - file: chart-08e2dd2c731205b7bbba24.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>chart-8d3c90cb691608f27aca18.jpg
<TEXT>
Document 10 - file: chart-8d3c90cb691608f27aca18.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>chart-20d8e119e7c09e0923ca24.jpg
<TEXT>
Document 11 - file: chart-20d8e119e7c09e0923ca24.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>chart-52eda2959946a8bf36ca18.jpg
<TEXT>
Document 12 - file: chart-52eda2959946a8bf36ca18.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>chart-91a6d649f1badab6348a18.jpg
<TEXT>
Document 13 - file: chart-91a6d649f1badab6348a18.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>14
<FILENAME>chart-761c2be3020511cbc0ea24.jpg
<TEXT>
Document 14 - file: chart-761c2be3020511cbc0ea24.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>15
<FILENAME>chart-8634be93c40fab336fea17.jpg
<TEXT>
Document 15 - file: chart-8634be93c40fab336fea17.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>16
<FILENAME>chart-0222237d585cba9a08aa18.jpg
<TEXT>
Document 16 - file: chart-0222237d585cba9a08aa18.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>17
<FILENAME>chart-a4ba342ba57c87aa8cba18.jpg
<TEXT>
Document 17 - file: chart-a4ba342ba57c87aa8cba18.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>18
<FILENAME>chart-f0423920a248e26032aa18.jpg
<TEXT>
Document 18 - file: chart-f0423920a248e26032aa18.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>19
<FILENAME>joekiani2018.jpg
<TEXT>
Document 19 - file: joekiani2018.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>20
<FILENAME>masimologo300x1a03.jpg
<TEXT>
Document 20 - file: masimologo300x1a03.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>21
<FILENAME>masimologoblkwhtx3a03.jpg
<TEXT>
Document 21 - file: masimologoblkwhtx3a03.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>22
<FILENAME>masimologoq22016eaa14.jpg
<TEXT>
Document 22 - file: masimologoq22016eaa14.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>23
<FILENAME>proxycardx1a03.jpg
<TEXT>
Document 23 - file: proxycardx1a03.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>24
<FILENAME>qrcodemasimox2a03.jpg
<TEXT>
Document 24 - file: qrcodemasimox2a03.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>25
<FILENAME>signaturex2a03.jpg
<TEXT>
Document 25 - file: signaturex2a03.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>26
<FILENAME>signaturex4a03.jpg
<TEXT>
Document 26 - file: signaturex4a03.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>27
<FILENAME>toplogowhtx1a03.jpg
<TEXT>
Document 27 - file: toplogowhtx1a03.jpg

</DOCUMENT>
</SEC-DOCUMENT>