<SEC-DOCUMENT>0000937556-19-000042-index.html : 20190226
<SEC-HEADER>0000937556-19-000042.hdr.sgml : 20190226
<ACCEPTANCE-DATETIME>20190226173044
ACCESSION NUMBER:		0000937556-19-000042
CONFORMED SUBMISSION TYPE:	S-3ASR
PUBLIC DOCUMENT COUNT:		8
FILED AS OF DATE:		20190226
DATE AS OF CHANGE:		20190226
EFFECTIVENESS DATE:		20190226

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:		S-3ASR
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-229892
		FILM NUMBER:		19634672

	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>S-3ASR
<SEQUENCE>1
<FILENAME>masi-20190226xsx3.htm
<DESCRIPTION>S-3ASR
<TEXT>
Document 1 - file: masi-20190226xsx3.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-4.3
<SEQUENCE>2
<FILENAME>masi-20190226xex43.htm
<DESCRIPTION>EXHIBIT 4.3
<TEXT>
Document 2 - file: masi-20190226xex43.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>3
<FILENAME>masi-20190226xex51.htm
<DESCRIPTION>EXHIBIT 5.1
<TEXT>
Document 3 - file: masi-20190226xex51.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.2
<SEQUENCE>4
<FILENAME>masi-20190226xex232.htm
<DESCRIPTION>EXHIBIT 23.2
<TEXT>
Document 4 - file: masi-20190226xex232.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>masimologo300pr.jpg
<TEXT>
Document 5 - file: masimologo300pr.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>phfooter2.jpg
<TEXT>
Document 6 - file: phfooter2.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>phheader1.jpg
<TEXT>
Document 7 - file: phheader1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>phheader1a01.jpg
<TEXT>
Document 8 - file: phheader1a01.jpg

</DOCUMENT>
</SEC-DOCUMENT>