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Disclosery

MASI MASIMO CORP

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Stock (common)

372 managers (380 13F filers) reported a position in MASI shares at 2025-06-30, 57,514,596 shares in all. 41 filers opened a position and 57 filers sold out during the quarter.

Managers
372
13F filers
380
New
41
Added
126
Reduced
137
Sold out
57
Shares held by filers
57,514,596

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q2 2025

Filers in the available 13F reports with a share position at 2025-06-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
BlackRock, Inc.in group BlackRock, Inc.10,507,326$1.77B0.03%+635,89813F-HRTimelineGroup
FMR LLCin group FMR LLC8,181,372$1.38B0.08%+2,60913F-HRTimelineGroup
Politan Capital Management LP4,716,536$793M56.98%+1,79013F-HRTimeline
VANGUARD GROUP INCgroup of 2 filers holding4,644,576$781M+55,585Timeline
T. Rowe Price Investment Management, In…2,500,144$421M0.27%+826,89213F-HRTimeline
MASSACHUSETTS FINANCIAL SERVICES CO /MA/in group MASSACHUSETTS FINANCIAL SERVI…2,470,393$416M0.13%+502,55513F-HRTimelineGroup
Capital Research Global Investorsin group Capital Research Global Inves…1,855,670$312M0.06%-200,42513F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP1,486,394$250M0.01%+10,40313F-HRTimelineGroup
Holocene Advisors, LP1,243,607$209M0.52%-89,68913F-HRTimeline
WESTFIELD CAPITAL MANAGEMENT CO LP1,181,203$199M0.83%+509,72413F-HRTimeline
Durable Capital Partners LP1,163,898$196M1.48%+38,27913F-HRTimeline
Alyeska Investment Group, L.P.in group Alyeska Investment Group, L.P.1,134,490$191M0.68%+411,95613F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC896,418$151M0.01%+52,10013F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.844,067$142M0.05%-21,80313F-HRTimeline
VIKING GLOBAL INVESTORS LPin group VIKING GLOBAL INVESTORS LP767,426$129M0.37%new13F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY767,375$129M0.01%+31,59313F-HRTimelineGroup
Liontrust Investment Partners LLP708,300$119M1.71%-39,19813F-HRTimeline
RTW INVESTMENTS, LP683,294$115M1.64%013F-HRTimeline
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP523,226$88M0.02%-180,15213F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC471,525$79.3M0.01%+191,27013F-HRTimelineGroup
Sumitomo Mitsui Trust Group, Inc.in group Sumitomo Mitsui Trust Group, …471,041$79.2M0.05%+98,06313F-HRTimelineGroup
SCHRODER INVESTMENT MANAGEMENT GROUP448,501$75.4M0.06%+12,95313F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/405,460$68.2M0.01%+122,82313F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC394,487$66.4M0.02%+182,70113F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP388,542$65.4M0.01%+5,18613F-HRTimelineGroup
BAMCO INC /NY/in group Baron Capital384,589$64.7M0.18%+67,30713F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co370,734$62.4M0.01%-6,33613F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding351,727$59.2M-7,580Timeline
Corient Private Wealth LPgroup of 2 filers holding331,914$55.8M-17,624Timeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp317,593$53.4M0.01%-14,51513F-HRTimelineGroup
Grantham, Mayo, Van Otterloo & Co. LLC240,563$40.5M0.12%new13F-HRTimeline
Invesco Ltd.in group Invesco Ltd.237,303$39.9M0.01%-24,05513F-HRTimelineGroup
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC200,229$33.7M0.01%-5,88713F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/190,176$32M<0.01%-126,46713F-HRTimelineGroup
COMERICA BANK189,822$31.9M0.12%+51,96713F-HRTimeline
Woodline Partners LP182,709$30.7M0.16%+49,74013F-HRTimeline
TD Asset Management Inc167,176$28.1M0.02%+78,50813F-HRTimeline
Gotham Asset Management, LLC165,356$27.8M0.17%+20,76613F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC152,228$25.6M0.01%+73,05213F-HRTimelineGroup
Nuveen, LLCin group TIAA149,658$25.2M0.01%-5,38713F-HRTimelineGroup
HAWK RIDGE CAPITAL MANAGEMENT LP148,685$25M1.04%new13F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO138,090$23.2M<0.01%-108,39913F-HRTimelineGroup
RHUMBLINE ADVISERS127,496$21.4M0.02%+4,68513F-HRTimeline
Quantinno Capital Management LP120,383$20.3M0.09%+56,64413F-HRTimeline
GAMCO Investors (Gabelli)group of 2 filers holding117,200$19.7M-300Timeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…115,626$19.5M0.04%-1,70013F-HR/ATimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA109,690$18.5M<0.01%+65,80613F-HR/ATimelineGroup
Tidal Investments LLCin group Tidal Investments LLC106,198$17.9M0.12%-4,28813F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc104,364$17.6M<0.01%+4,82213F-HRTimelineGroup
PRINCIPAL FINANCIAL GROUP INCgroup of 2 filers holding102,471$17.2M-248Timeline
Alpha Wave Global, LP102,068$17.2M1.85%new13F-HRTimeline
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP99,612$16.8M0.01%-45,55213F-HRTimelineGroup
CRAMER ROSENTHAL MCGLYNN LLC94,939$16M1.1%-56,72513F-HRTimeline
PFM Health Sciences, LP94,451$15.9M1.38%new13F-HRTimeline
Erste Asset Management GmbHin group Erste Asset Management GmbH92,000$15.5M0.13%013F-HRTimelineGroup
Bellevue Group AGin group Bellevue Group AG89,673$15.1M0.33%+19,86513F-HRTimelineGroup
Swiss National Bank87,700$14.8M0.01%-50013F-HRTimeline
BLI - Banque de Luxembourg Investments86,700$14.6M0.42%-14,50013F-HRTimeline
GREAT LAKES ADVISORS, LLC82,348$13.9M0.12%-10,52413F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC74,027$12.5M0.03%+57,35913F-HR/ATimelineGroup
Swedbank ABin group Swedbank AB73,800$12.4M0.01%13F-HRTimelineGroup
California Public Employees Retirement …72,807$12.2M0.01%+2,93213F-HRTimeline
Point72 (DIFC) Ltd68,700$11.6M0.92%+27,06113F-HRTimeline
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …65,821$11.1M0.03%new13F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …58,714$9.88M0.01%+4,81413F-HRTimelineGroup
FIL Ltdin group FIL Ltd56,326$9.48M0.01%-113,46213F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC56,114$9.44M<0.01%+16,26113F-HR/ATimelineGroup
STRS OHIO55,983$9.42M0.04%+15,84813F-HRTimeline
Retirement Systems of Alabama55,003$9.25M0.03%+91613F-HRTimeline
BANK OF NOVA SCOTIAin group BANK OF NOVA SCOTIA53,108$8.93M0.02%-40,09513F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC50,256$8.45M0.01%+42,11413F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC49,962$8.4M0.01%-2,19613F-HRTimelineGroup
Cinctive Capital Management LP46,787$7.87M0.44%new13F-HRTimeline
NATIXISin group Natixis Investment Managers45,648$7.68M0.04%new13F-HRTimelineGroup
4D Advisors, LLC45,000$7.57M4.07%+15,00013F-HRTimeline
PICTON MAHONEY ASSET MANAGEMENT44,557$7.49M0.11%+40513F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…43,353$7.29M0.01%+10113F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…43,319$7.29M0.01%+54813F-HRTimeline
Walleye Capital LLCin group Walleye Capital LLC43,232$7.27M0.07%-33,13813F-HRTimelineGroup
NS Partners Ltd42,566$7.16M0.29%-98913F-HRTimeline
Amundiin group Amundi41,583$7.12M<0.01%+41613F-HRTimelineGroup
Baird Financial Group, Inc.in group Baird Financial Group, Inc.40,720$6.85M0.01%-4,40013F-HRTimelineGroup
NEW YORK STATE TEACHERS RETIREMENT SYST…40,048$6.74M0.01%013F-HRTimeline
NORGES BANK39,053$6.57M<0.01%-36113F-HRTimeline
BRIDGER MANAGEMENT, LLC33,641$5.66M3.34%-5,65913F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC31,750$5.34M0.05%-74413F-HRTimeline
NORDEA INVESTMENT MANAGEMENT ABin group NORDEA INVESTMENT MANAGEMENT …31,868$5.33M<0.01%+5,65913F-HRTimelineGroup
LOGAN CAPITAL MANAGEMENT INC31,352$5.27M0.25%-11,04313F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO30,506$5.13M0.01%-18,85913F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC29,368$4.94M<0.01%+3,00113F-HRTimeline
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC27,234$4.58M<0.01%-4,55413F-HRTimelineGroup
WILSON ASSET MANAGEMENT (INTERNATIONAL)…27,234$4.58M1.13%new13F-HRTimeline
HARBOR CAPITAL ADVISORS, INC.26,412$4.44M0.19%new13F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…26,285$4.42M0.03%+64513F-HRTimelineGroup
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co26,120$4.39M0.01%-49213F-HRTimelineGroup
Westmount Partners, LLC25,866$4.35M1.19%-12513F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC25,377$4.27M0.01%+10,37713F-HRTimeline
South Dakota Investment Council24,768$4.17M0.08%013F-HRTimeline
Advisors Asset Management, Inc.24,383$4.1M0.07%-2,90513F-HR/ATimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC24,277$4.08M<0.01%-25,20513F-HRTimelineGroup
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.24,219$4.07M0.01%-291,20313F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND24,160$4.06M0.01%013F-HR/ATimeline
Sterling Capital Management LLC23,267$3.91M0.06%+2,66113F-HR/ATimeline
Montanaro Asset Management Ltd22,860$3.85M0.99%-9,44013F-HRTimeline
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLCin group MUTUAL OF AMERICA CAPITAL MAN…22,379$3.76M0.04%-49213F-HRTimelineGroup
AMALGAMATED BANK21,743$3.66M0.03%+1,08113F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD21,644$3.64M0.01%+5,11013F-HRTimeline
Perpetual Ltdin group Perpetual Ltd21,172$3.56M0.04%-9,03713F-HRTimelineGroup
Treasurer of the State of North Carolina21,053$3.54M0.01%+1,19813F-HRTimeline
Allspring Global Investments Holdings, …in group Allspring Global Investments …20,897$3.53M0.01%-17,40513F-HRTimelineGroup
Cardinal Capital Management20,237$3.4M0.5%+36913F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson20,000$3.36M<0.01%013F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC19,581$3.29M<0.01%+7,30713F-HRTimelineGroup
COMMERCE BANKin group COMMERCE BANK19,430$3.27M0.02%+14,40613F-HRTimelineGroup
Verition Fund Management LLC18,313$3.08M0.02%-125,44613F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN18,189$3.06M<0.01%-32813F-HRTimelineGroup
State of Tennessee, Department of Treas…18,170$3.06M0.01%013F-HRTimeline
STOREBRAND ASSET MANAGEMENT AS17,732$2.98M0.01%013F-HRTimeline
Police & Firemen's Retirement System of…16,943$2.85M0.03%+1,21513F-HRTimeline
Ensign Peak Advisors, Inc15,976$2.69M<0.01%+84313F-HRTimeline
State of New Jersey Common Pension Fund…in group State of New Jersey Common Pe…15,867$2.67M0.01%013F-HRTimelineGroup
CANADA PENSION PLAN INVESTMENT BOARD15,800$2.66M<0.01%013F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…15,677$2.64M<0.01%+10,25113F-HRTimelineGroup
YOUSIF CAPITAL MANAGEMENT, LLC15,641$2.63M0.03%-14513F-HRTimeline
BROWN ADVISORY INCin group BROWN ADVISORY INC15,532$2.61M<0.01%+4413F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP15,465$2.6M<0.01%-9,70013F-HRTimelineGroup
TEACHERS RETIREMENT SYSTEM OF THE STATE…14,771$2.48M0.02%013F-HRTimeline
SG Americas Securities, LLC14,766$2.48M0.01%+13,14313F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…14,332$2.41M0.01%+59813F-HRTimeline
Schonfeld Strategic Advisors LLC14,239$2.4M0.02%+3,96913F-HRTimeline
Empower Advisory Group, LLC14,060$2.37M0.01%013F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM13,385$2.25M0.01%+35713F-HRTimeline
LOCKERMAN FINANCIAL GROUP, INC.13,100$2.2M2.97%013F-HRTimeline
Louisiana State Employees Retirement Sy…12,700$2.14M0.04%+30013F-HRTimeline
Illinois Municipal Retirement Fund12,420$2.09M0.03%+3,11113F-HRTimeline
Handelsbanken Fonder AB12,330$2.07M0.01%-60013F-HRTimeline
Mitsubishi UFJ Trust & Banking Corpgroup of 2 filers holding12,319$2.07M+280Timeline
FRED ALGER MANAGEMENT, LLCin group FRED ALGER MANAGEMENT, LLC12,185$2.05M0.01%+3,41313F-HRTimelineGroup
TEACHER RETIREMENT SYSTEM OF TEXAS11,671$1.96M0.01%-1,59213F-HRTimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…11,562$1.94M0.01%+93913F-HRTimeline
PARADIGM CAPITAL MANAGEMENT INC/NY11,353$1.91M0.09%013F-HRTimeline
Creative Planningin group Creative Planning11,170$1.88M<0.01%-4813F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…11,062$1.86M<0.01%-30913F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…10,935$1.84M<0.01%-23,81213F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd10,837$1.82M0.08%new13F-HRTimelineGroup
STATE OF MICHIGAN RETIREMENT SYSTEM10,796$1.82M0.01%+20013F-HRTimeline
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…10,596$1.78M<0.01%+17713F-HR/ATimelineGroup
Graham Capital Management, L.P.10,480$1.76M0.05%new13F-HRTimeline
NORTHWESTERN MUTUAL INVESTMENT MANAGEME…group of 2 filers holding10,199$1.72M+166Timeline
Wilmington Savings Fund Society, FSB9,950$1.67M0.03%-1,29013F-HRTimeline
NEW MEXICO EDUCATIONAL RETIREMENT BOARD9,900$1.67M0.05%013F-HRTimeline
KLP KAPITALFORVALTNING AS9,400$1.58M0.01%+50013F-HRTimeline
OREGON PUBLIC EMPLOYEES RETIREMENT FUND9,219$1.55M0.03%+20013F-HRTimeline
XPONANCE LLC9,206$1.55M0.01%+2,10513F-HRTimeline
TOWNSQUARE CAPITAL LLC9,014$1.52M0.15%-85613F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…8,857$1.49M<0.01%+66213F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…8,744$1.47M0.05%013F-HRTimelineGroup
Birchview Capital, LP8,280$1.39M1.38%-3,00013F-HRTimeline
Onex Canada Asset Management Inc.8,224$1.38M0.17%-9,23113F-HRTimeline
DE BURLO GROUP INC8,102$1.36M0.18%-30013F-HRTimeline
Entropy Technologies, LP8,000$1.35M0.11%+6,19713F-HRTimeline
LPL Financial LLC7,304$1.23M<0.01%+2,24813F-HRTimeline
MARSHALL WACE, LLPin group MARSHALL WACE, LLP7,208$1.21M<0.01%-3,76613F-HRTimelineGroup
Summit Trail Advisors, LLC7,160$1.2M0.02%new13F-HRTimeline
Pathstone Holdings, LLCin group Pathstone Holdings, LLC7,099$1.19M<0.01%+1,60413F-HRTimelineGroup
LANDSCAPE CAPITAL MANAGEMENT, L.L.C.in group LANDSCAPE CAPITAL MANAGEMENT,…7,029$1.18M0.09%+2,03113F-HRTimelineGroup
Engineers Gate Manager LP6,873$1.16M0.01%-88113F-HRTimeline
Bayforest Capital Ltd6,705$1.13M0.49%new13F-HRTimeline
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…6,679$1.12M<0.01%-11213F-HRTimelineGroup
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …6,640$1.12M<0.01%+23513F-HRTimelineGroup
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…6,398$1.08M<0.01%+71413F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\6,312$1.06M<0.01%+313F-HRTimelineGroup
GUGGENHEIM CAPITAL LLCin group GUGGENHEIM CAPITAL LLC5,673$954K0.01%-68313F-HRTimelineGroup
Calamos Advisors LLCin group Calamos Advisors LLC5,617$945K<0.01%-17,83213F-HRTimelineGroup
WINTON GROUP Ltdin group WINTON GROUP Ltd5,617$945K0.05%new13F-HRTimelineGroup
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/5,563$936K<0.01%-56513F-HRTimelineGroup
B.O.S.S. Retirement Advisors, LLC5,332$897K0.23%013F-HRTimeline
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC5,069$853K<0.01%-69,89313F-HR/ATimelineGroup
State of Alaska, Department of Revenue5,054$850K0.01%-15013F-HRTimeline
QUADRANT CAPITAL GROUP LLC4,981$838K0.03%+93313F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources4,902$825K<0.01%-7,38413F-HRTimelineGroup
Bryce Point Capital, LLC4,885$822K0.7%new13F-HRTimeline
Orion Porfolio Solutions, LLC4,871$819K0.01%+10413F-HR/ATimeline
Eukles Asset Management4,853$816K0.33%-26313F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…4,685$788K<0.01%-15613F-HRTimeline
Laird Norton Wetherby Wealth Management…4,557$767K0.03%13F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS4,483$754K<0.01%-66,24013F-HRTimelineGroup
NorthCoast Asset Management LLC4,396$739K<0.01%+48013F-HRTimeline
Vestmark Advisory Solutions, Inc.4,250$715K0.01%+97613F-HRTimeline
Private Advisor Group, LLC4,244$714K<0.01%-1113F-HRTimeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.4,201$707K<0.01%-46,80113F-HRTimelineGroup
US BANCORP \DE\in group US BANCORP \DE\4,170$701K<0.01%-15613F-HRTimelineGroup
SteelPeak Wealth, LLC4,067$684K0.03%-313F-HRTimeline
NEOS Investment Management LLC3,949$664K0.01%-59413F-HRTimeline
Tema ETFs LLC3,949$664K0.18%-59413F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC3,907$657K<0.01%-130,89913F-HRTimelineGroup
HighTower Advisors, LLC3,889$654K<0.01%-66113F-HRTimeline
RFG Advisory, LLC3,887$654K0.02%-2,89313F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC3,872$651K<0.01%+68213F-HRTimelineGroup
Vestcor Inc3,825$643K0.02%013F-HRTimeline