    <SEC-DOCUMENT>0000937556-22-000074-index.html : 20220405
    <SEC-HEADER>0000937556-22-000074.hdr.sgml : 20220405
    <ACCEPTANCE-DATETIME>20220404210101
    ACCESSION NUMBER:		0000937556-22-000074
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		66
    CONFORMED PERIOD OF REPORT:	20220101
    FILED AS OF DATE:		20220405
    DATE AS OF CHANGE:		20220404

    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:			0101

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-33642
    		FILM NUMBER:		22804960

    	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-20220404xscheduledef1.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: masi-20220404xscheduledef1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>a2022proxystatementbackv3a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: a2022proxystatementbackv3a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>a2022proxystatementcoverv3a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: a2022proxystatementcoverv3a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>a5yeartotalreturna.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: a5yeartotalreturna.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>adammikkelson-biophotov2coa.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: adammikkelson-biophotov2coa.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>bmuhsin2018ba.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: bmuhsin2018ba.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>capture2a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: capture2a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>capture3a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: capture3a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>chart-0834940d681b4b85b69a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: chart-0834940d681b4b85b69a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>chart-1e41f7a248f8404b9dca.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: chart-1e41f7a248f8404b9dca.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>chart-1e68178503ea4e498e6a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: chart-1e68178503ea4e498e6a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>chart-1f88d65e9a974ebcbeda.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: chart-1f88d65e9a974ebcbeda.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>chart-4bf2bacadff74035adba.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 13 - file: chart-4bf2bacadff74035adba.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>chart-6d3dca985e6a47d0b3fa.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 14 - file: chart-6d3dca985e6a47d0b3fa.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>chart-88a216adef9249bd8daa.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 15 - file: chart-88a216adef9249bd8daa.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>chart-b8999363160b433fad9a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 16 - file: chart-b8999363160b433fad9a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>chart-c5dcef6bd1ce40aaaa9a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 17 - file: chart-c5dcef6bd1ce40aaaa9a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>chart-cd53e92d996a49f681da.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 18 - file: chart-cd53e92d996a49f681da.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>chart-cee29b479dcb48ff9f0a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 19 - file: chart-cee29b479dcb48ff9f0a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>chart-e7ee630e04b1485ead8a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 20 - file: chart-e7ee630e04b1485ead8a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>chart-e8ab6a4b50624bb6896a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 21 - file: chart-e8ab6a4b50624bb6896a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>chart-eafd6099e86a4d9eb65a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 22 - file: chart-eafd6099e86a4d9eb65a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>chart-eed15e9eb2e04229922a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 23 - file: chart-eed15e9eb2e04229922a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>chart-fdaf6d067f6b46b8968a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 24 - file: chart-fdaf6d067f6b46b8968a.jpg

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

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

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

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>28
    <FILENAME>craigreynolds-v31xbiophotoa.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 28 - file: craigreynolds-v31xbiophotoa.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>29
    <FILENAME>enviro-energya.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 29 - file: enviro-energya.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>30
    <FILENAME>equitypiea1a01a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 30 - file: equitypiea1a01a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>31
    <FILENAME>ft-854bgraphicsmasimo2021pa.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 31 - file: ft-854bgraphicsmasimo2021pa.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>32
    <FILENAME>globea.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 32 - file: globea.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>33
    <FILENAME>greencheckmarka.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 33 - file: greencheckmarka.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>34
    <FILENAME>hospitala.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 34 - file: hospitala.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>35
    <FILENAME>image123.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 35 - file: image123.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>36
    <FILENAME>image124a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 36 - file: image124a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>37
    <FILENAME>image25.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 37 - file: image25.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>38
    <FILENAME>independenta.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 38 - file: independenta.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>39
    <FILENAME>jkianida.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 39 - file: jkianida.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>40
    <FILENAME>joekiani-chairmanltr2a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 40 - file: joekiani-chairmanltr2a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>41
    <FILENAME>julieashimer-biophotocopya.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 41 - file: julieashimer-biophotocopya.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>42
    <FILENAME>location1a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 42 - file: location1a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>43
    <FILENAME>ltipiea.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 43 - file: ltipiea.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>44
    <FILENAME>march2022a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 44 - file: march2022a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>45
    <FILENAME>margina.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 45 - file: margina.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>46
    <FILENAME>masilogoblacka.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 46 - file: masilogoblacka.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>47
    <FILENAME>masimologo2019a01.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 47 - file: masimologo2019a01.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>48
    <FILENAME>may26a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 48 - file: may26a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>49
    <FILENAME>mmichaelcohen-biophotov2coa.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 49 - file: mmichaelcohen-biophotov2coa.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>50
    <FILENAME>myoungba.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 50 - file: myoungba.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>51
    <FILENAME>non-employeedircompchart3a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 51 - file: non-employeedircompchart3a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>52
    <FILENAME>patienta.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 52 - file: patienta.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>53
    <FILENAME>purchasea.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 53 - file: purchasea.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>54
    <FILENAME>redxmarka.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 54 - file: redxmarka.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>55
    <FILENAME>reinvesta.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 55 - file: reinvesta.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>56
    <FILENAME>revenuea.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 56 - file: revenuea.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>57
    <FILENAME>root-icona.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 57 - file: root-icona.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>58
    <FILENAME>scantoa.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 58 - file: scantoa.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>59
    <FILENAME>shareholderengagementv4141a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 59 - file: shareholderengagementv4141a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>60
    <FILENAME>shareholdersa.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 60 - file: shareholdersa.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>61
    <FILENAME>shippinga.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 61 - file: shippinga.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>62
    <FILENAME>supplychaina.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 62 - file: supplychaina.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>63
    <FILENAME>tlevyba.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 63 - file: tlevyba.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>64
    <FILENAME>tmcclenahanba.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 64 - file: tmcclenahanba.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>65
    <FILENAME>workforcea.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 65 - file: workforcea.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>66
    <FILENAME>yesa.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 66 - file: yesa.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>