<SEC-DOCUMENT>0000937556-17-000226-index.html : 20171207
<SEC-HEADER>0000937556-17-000226.hdr.sgml : 20171207
<ACCEPTANCE-DATETIME>20171207193810
ACCESSION NUMBER:		0000937556-17-000226
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20171205
FILED AS OF DATE:		20171207
DATE AS OF CHANGE:		20171207

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Lee Yongsam
		CENTRAL INDEX KEY:			0001403400

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33642
		FILM NUMBER:		171245891

	MAIL ADDRESS:	
		STREET 1:		C/O MASIMO CORPORATION
		STREET 2:		40 PARKER
		CITY:			IRVINE
		STATE:			CA
		ZIP:			92618

ISSUER:		

	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

	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>4
<SEQUENCE>1
<FILENAME>wf-form4_151269347616843.xml
<DESCRIPTION>FORM 4
<TEXT>
Document 1 - file: wf-form4_151269347616843.html

Document 1 - RAW XML: wf-form4_151269347616843.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>ex-24.htm
<DESCRIPTION>EX 24 - YONGSAM LEE
<TEXT>
Document 2 - file: ex-24.htm

</DOCUMENT>
</SEC-DOCUMENT>