<SEC-DOCUMENT>0002052113-25-000197-index.html : 20250304
<SEC-HEADER>0002052113-25-000197.hdr.sgml : 20250304
<ACCEPTANCE-DATETIME>20250304123914
ACCESSION NUMBER:		0002052113-25-000197
CONFORMED SUBMISSION TYPE:	SCHEDULE 13G
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20250304
DATE AS OF CHANGE:		20250304

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MASIMO CORP
		CENTRAL INDEX KEY:			0000937556
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS [3845]
		ORGANIZATION NAME:           	08 Industrial Applications and Services
		IRS NUMBER:				330368882
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1228

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-83497
		FILM NUMBER:		25702558

	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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BlackRock Portfolio Management LLC
		CENTRAL INDEX KEY:			0002052113
		ORGANIZATION NAME:           	
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G

	BUSINESS ADDRESS:	
		STREET 1:		50 HUDSON YARDS
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10001
		BUSINESS PHONE:		(212) 810-5800

	MAIL ADDRESS:	
		STREET 1:		50 HUDSON YARDS
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10001
</SEC-HEADER>
<DOCUMENT>
<TYPE>SCHEDULE 13G
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
Document 1 - file: primary_doc.html

Document 1 - RAW XML: primary_doc.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>PowerOfAttorney.txt
<TEXT>
Document 2 - file: PowerOfAttorney.txt

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99
<SEQUENCE>3
<FILENAME>Item_7.txt
<TEXT>
Document 3 - file: Item_7.txt

</DOCUMENT>
</SEC-DOCUMENT>