Skip to content
Disclosery

MASI MASIMO CORP

Follow

Stock (common)

385 managers (394 13F filers) reported a position in MASI shares at 2025-03-31, 54,175,363 shares in all. 70 filers opened a position and 46 filers sold out during the quarter.

Managers
385
13F filers
394
New
70
Added
136
Reduced
118
Sold out
46
Shares held by filers
54,175,363

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, Q1 2025

Filers in the available 13F reports with a share position at 2025-03-31, 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.9,871,428$1.64B0.03%+1,173,21513F-HRTimelineGroup
FMR LLCin group FMR LLC8,178,763$1.36B0.09%+81,30913F-HRTimelineGroup
Politan Capital Management LP4,714,746$785M53.37%013F-HRTimeline
VANGUARD GROUP INCgroup of 2 filers holding4,588,991$765M-3,403Timeline
Capital Research Global Investorsin group Capital Research Global Inves…2,056,095$343M0.07%-398,88013F-HRTimelineGroup
MASSACHUSETTS FINANCIAL SERVICES CO /MA/in group MASSACHUSETTS FINANCIAL SERVI…1,967,838$328M0.11%+232,67113F-HRTimelineGroup
T. Rowe Price Investment Management, In…1,673,252$279M0.18%+10,87613F-HRTimeline
STATE STREET CORPin group STATE STREET CORP1,475,991$246M0.01%+12,52513F-HRTimelineGroup
Holocene Advisors, LP1,333,296$222M0.66%+497,63613F-HRTimeline
Durable Capital Partners LP1,125,619$188M1.68%new13F-HRTimeline
ALLIANCEBERNSTEIN L.P.865,870$144M0.05%-81,52113F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC844,318$141M0.01%+43,19313F-HRTimelineGroup
Liontrust Investment Partners LLP747,498$125M1.94%-45,43713F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY735,782$123M0.01%-2,05913F-HRTimelineGroup
Alyeska Investment Group, L.P.in group Alyeska Investment Group, L.P.722,534$120M0.48%+143,89913F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP703,378$117M0.03%+55,65813F-HRTimelineGroup
RTW INVESTMENTS, LP683,294$114M1.74%013F-HRTimeline
WESTFIELD CAPITAL MANAGEMENT CO LP671,479$112M0.54%-97,37913F-HRTimeline
SCHRODER INVESTMENT MANAGEMENT GROUP435,548$71.2M0.07%-130,92113F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP383,356$63.9M0.01%-51313F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co377,070$62.8M0.01%-76613F-HR/ATimelineGroup
Sumitomo Mitsui Trust Group, Inc.in group Sumitomo Mitsui Trust Group, …372,978$62.1M0.04%-72713F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding359,307$59.9M+9,033Timeline
Corient Private Wealth LPgroup of 2 filers holding349,538$58.2M+1,855Timeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp332,108$55.3M0.01%-5,11313F-HRTimelineGroup
BAMCO INC /NY/in group Baron Capital317,282$52.9M0.16%+10,13813F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/316,643$52.8M<0.01%+209,34013F-HRTimelineGroup
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.315,422$52.5M0.15%+66,92313F-HR/ATimelineGroup
Artisan Partners Limited Partnership299,023$49.8M0.08%new13F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/282,637$47.1M0.01%+31,85113F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC280,255$46.7M0.01%+78,00313F-HR/ATimelineGroup
Invesco Ltd.in group Invesco Ltd.261,358$43.5M0.01%-16,60213F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO246,489$41.1M<0.01%+117,85013F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC211,786$35.3M0.01%-4,16013F-HRTimelineGroup
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC206,116$34.3M0.01%+2,14513F-HRTimelineGroup
FIL Ltdin group FIL Ltd169,788$28.3M0.03%+59,45613F-HRTimelineGroup
Nuveen, LLCin group TIAA155,045$25.8M0.01%13F-HRTimelineGroup
CRAMER ROSENTHAL MCGLYNN LLC151,664$25.3M1.82%-71,15313F-HRTimeline
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP145,164$24.2M0.02%+97,83613F-HRTimelineGroup
Gotham Asset Management, LLC144,590$24.1M0.2%+16,81013F-HRTimeline
Verition Fund Management LLC143,759$24M0.14%+136,27813F-HRTimeline
COMERICA BANK137,855$23M0.1%-3,52313F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC134,806$22.5M0.02%-273,25213F-HRTimelineGroup
Woodline Partners LP132,969$22.2M0.14%+81,78413F-HRTimeline
RHUMBLINE ADVISERS122,811$20.5M0.02%-1,56213F-HR/ATimeline
GAMCO Investors (Gabelli)group of 2 filers holding117,500$19.6M0Timeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…117,326$19.5M0.05%+26,42513F-HRTimelineGroup
Tidal Investments LLCin group Tidal Investments LLC110,486$18.4M0.16%+23,75513F-HRTimelineGroup
PRINCIPAL FINANCIAL GROUP INCgroup of 2 filers holding102,719$17.1M+1Timeline
Legal & General Group Plcin group Legal & General Group Plc99,542$16.6M<0.01%+2,35513F-HRTimelineGroup
BLI - Banque de Luxembourg Investments101,200$16.5M0.5%013F-HRTimeline
BANK OF NOVA SCOTIAin group BANK OF NOVA SCOTIA93,203$15.5M0.03%new13F-HR/ATimelineGroup
GREAT LAKES ADVISORS, LLC92,872$15.5M0.14%-2,85813F-HRTimeline
Erste Asset Management GmbHin group Erste Asset Management GmbH92,000$15.3M0.2%+9,34813F-HRTimelineGroup
TD Asset Management Inc88,668$14.8M0.01%+4,02813F-HRTimeline
Swiss National Bank88,200$14.7M0.01%-1,20013F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC79,176$13.2M0.01%+66,51713F-HRTimelineGroup
Walleye Capital LLCin group Walleye Capital LLC76,370$12.7M0.14%+21,43213F-HRTimelineGroup
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC74,962$12.5M0.01%-63,16013F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS70,723$11.8M0.01%+63,70313F-HRTimelineGroup
California Public Employees Retirement …69,875$11.6M0.01%-35413F-HRTimeline
Bellevue Group AGin group Bellevue Group AG69,808$11.6M0.26%+45,64213F-HRTimelineGroup
Quantinno Capital Management LP63,739$10.6M0.07%+59,74913F-HRTimeline
ExodusPoint Capital Management, LP59,792$9.96M0.13%+34,36613F-HRTimeline
Retirement Systems of Alabama54,087$9.01M0.04%+5213F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …53,900$8.98M0.01%+2,44313F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC52,158$8.69M0.01%-39,53313F-HRTimelineGroup
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.51,002$8.5M0.02%-1,73213F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC49,482$8.24M0.01%-391,54313F-HRTimelineGroup
SEI INVESTMENTS COin group SEI INVESTMENTS CO49,365$8.22M0.01%+22,76413F-HR/ATimelineGroup
Corebridge Financial, Inc.in group Corebridge Financial, Inc.49,327$8.22M0.05%-1,20913F-HRTimelineGroup
Baird Financial Group, Inc.in group Baird Financial Group, Inc.45,120$7.52M0.01%+10,92213F-HRTimelineGroup
Integral Health Asset Management, LLC45,000$7.5M0.83%new13F-HRTimeline
PICTON MAHONEY ASSET MANAGEMENT44,152$7.36M0.25%+1,54213F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA43,884$7.31M<0.01%+13,51313F-HR/ATimelineGroup
NS Partners Ltd43,555$7.26M0.32%+90613F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…43,252$7.21M0.01%+86913F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…42,771$7.13M0.01%-9013F-HRTimeline
LOGAN CAPITAL MANAGEMENT INC42,395$7.06M0.32%-5,39213F-HRTimeline
Point72 (DIFC) Ltd41,639$6.94M0.67%-16,77813F-HRTimeline
STRS OHIO40,135$6.69M0.03%+24,73513F-HRTimeline
NEW YORK STATE TEACHERS RETIREMENT SYST…40,048$6.67M0.02%-5,20013F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC39,853$6.64M<0.01%-13,36613F-HR/ATimelineGroup
NORGES BANK39,414$6.57M<0.01%+6,02013F-HR/ATimeline
BRIDGER MANAGEMENT, LLC39,300$6.55M3.25%new13F-HRTimeline
Allspring Global Investments Holdings, …in group Allspring Global Investments …38,302$6.42M0.01%-10,46213F-HRTimelineGroup
Amundiin group Amundi41,167$6.27M<0.01%-70,31413F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…34,747$5.79M0.01%+15,04413F-HRTimelineGroup
INTECH INVESTMENT MANAGEMENT LLC32,494$5.41M0.06%+6,87213F-HRTimeline
Montanaro Asset Management Ltd32,300$5.38M1.58%-14,20013F-HRTimeline
ENVESTNET ASSET MANAGEMENT INCgroup of 2 filers holding31,788$5.3M-824Timeline
Lisanti Capital Growth, LLC30,485$5.08M1.51%new13F-HRTimeline
Perpetual Ltdin group Perpetual Ltd30,209$5.03M0.06%new13F-HRTimelineGroup
4D Advisors, LLC30,000$5M3.88%new13F-HRTimeline
ZACKS INVESTMENT MANAGEMENT27,807$4.63M0.04%+57813F-HRTimeline
Advisors Asset Management, Inc.27,288$4.55M0.09%+4,31413F-HR/ATimeline
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co26,612$4.43M0.01%-10,94813F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC26,367$4.39M<0.01%+17,36313F-HRTimeline
Redmile Group, LLCin group Redmile Group, LLC26,062$4.34M0.41%new13F-HRTimelineGroup
Westmount Partners, LLC25,991$4.33M1.32%013F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…25,640$4.27M0.02%-38613F-HRTimelineGroup
NORDEA INVESTMENT MANAGEMENT ABin group NORDEA INVESTMENT MANAGEMENT …26,209$4.22M<0.01%+7,02713F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding25,165$4.19M-19,224Timeline
South Dakota Investment Council24,768$4.13M0.08%-5,84313F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND24,160$4.03M0.01%-313F-HR/ATimeline
Calamos Advisors LLCin group Calamos Advisors LLC23,449$3.91M0.02%+7,16913F-HRTimelineGroup
Informed Momentum Co LLC22,952$3.82M0.66%new13F-HRTimeline
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLCin group MUTUAL OF AMERICA CAPITAL MAN…22,871$3.81M0.04%-60313F-HR/ATimelineGroup
AMALGAMATED BANK20,662$3.44M0.03%-64213F-HRTimeline
Sterling Capital Management LLC20,606$3.43M0.05%-5,61513F-HRTimeline
Cardinal Capital Management19,868$3.31M0.51%+1,14813F-HRTimeline
Treasurer of the State of North Carolina19,855$3.31M0.01%+77013F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson20,000$3.27M<0.01%-1,00013F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN18,517$3.08M<0.01%-1,22613F-HRTimelineGroup
State of Tennessee, Department of Treas…18,170$3.03M0.01%+2,87013F-HRTimeline
STOREBRAND ASSET MANAGEMENT AS17,732$2.95M0.01%013F-HRTimeline
Onex Canada Asset Management Inc.17,455$2.91M0.37%-19,60613F-HRTimeline
Aquatic Capital Management LLC17,388$2.9M0.07%new13F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC16,668$2.78M0.01%new13F-HR/ATimelineGroup
STATE OF WISCONSIN INVESTMENT BOARD16,534$2.75M0.01%-40413F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…16,019$2.67M0.07%new13F-HRTimelineGroup
State of New Jersey Common Pension Fund…in group State of New Jersey Common Pe…15,867$2.64M0.01%-86913F-HRTimelineGroup
CANADA PENSION PLAN INVESTMENT BOARD15,800$2.63M<0.01%-30013F-HRTimeline
YOUSIF CAPITAL MANAGEMENT, LLC15,786$2.63M0.03%-36913F-HRTimeline
Police & Firemen's Retirement System of…15,728$2.62M0.03%+15513F-HRTimeline
BROWN ADVISORY INCin group BROWN ADVISORY INC15,488$2.58M<0.01%-3313F-HRTimelineGroup
Ensign Peak Advisors, Inc15,133$2.52M<0.01%+25713F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC15,000$2.5M<0.01%new13F-HRTimeline
TEACHERS RETIREMENT SYSTEM OF THE STATE…14,771$2.46M0.02%013F-HRTimeline
Empower Advisory Group, LLC14,060$2.34M0.01%013F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…13,734$2.29M0.01%-1,55013F-HRTimeline
Aster Capital Management (DIFC) Ltd11,912$2.25M0.42%new13F-HRTimeline
TEACHER RETIREMENT SYSTEM OF TEXAS13,263$2.21M0.01%-3,67113F-HRTimeline
LOCKERMAN FINANCIAL GROUP, INC.13,100$2.18M3.3%-50013F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM13,028$2.17M0.01%-15513F-HRTimeline
Handelsbanken Fonder AB12,930$2.15M0.01%013F-HRTimeline
Louisiana State Employees Retirement Sy…12,400$2.07M0.04%+10013F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources12,286$2.05M<0.01%+9,36113F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC12,274$2.04M<0.01%-28513F-HR/ATimelineGroup
Mitsubishi UFJ Trust & Banking Corpgroup of 2 filers holding12,039$2.01M+8,115Timeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…11,371$1.89M<0.01%+6613F-HRTimelineGroup
PARADIGM CAPITAL MANAGEMENT INC/NY11,353$1.89M0.11%013F-HRTimeline
Birchview Capital, LP11,280$1.88M1.63%-4,00013F-HRTimeline
Wilmington Savings Fund Society, FSB11,240$1.87M0.03%-2,47713F-HRTimeline
Creative Planningin group Creative Planning11,218$1.87M<0.01%-2,97913F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP10,974$1.83M<0.01%-2,31513F-HRTimelineGroup
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…10,623$1.77M0.01%+80813F-HRTimeline
STATE OF MICHIGAN RETIREMENT SYSTEM10,596$1.77M0.01%+10013F-HRTimeline
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…10,419$1.74M<0.01%-3713F-HR/ATimelineGroup
Schonfeld Strategic Advisors LLC10,270$1.71M0.01%+6,29013F-HRTimeline
Neo Ivy Capital Management10,248$1.71M0.54%new13F-HRTimeline
VIRGINIA RETIREMENT SYSTEMS ET Al10,197$1.7M0.01%13F-HRTimeline
NORTHWESTERN MUTUAL INVESTMENT MANAGEME…group of 2 filers holding10,033$1.67M+5Timeline
NEW MEXICO EDUCATIONAL RETIREMENT BOARD9,900$1.65M0.06%013F-HRTimeline
TOWNSQUARE CAPITAL LLC9,870$1.64M0.02%+1,74413F-HRTimeline
Illinois Municipal Retirement Fund9,309$1.55M0.02%013F-HRTimeline
OREGON PUBLIC EMPLOYEES RETIREMENT FUND9,019$1.5M0.03%-6013F-HRTimeline
KLP KAPITALFORVALTNING AS8,900$1.48M0.01%-50013F-HRTimeline
FRED ALGER MANAGEMENT, LLCin group FRED ALGER MANAGEMENT, LLC8,772$1.46M0.01%-11,65813F-HRTimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…8,744$1.46M0.05%-15713F-HRTimelineGroup
Fieldview Capital Management, LLC8,675$1.45M0.2%new13F-HRTimeline
DE BURLO GROUP INC8,402$1.4M0.21%-15013F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…8,195$1.37M<0.01%013F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC8,142$1.3M<0.01%+4,70013F-HRTimelineGroup
Engineers Gate Manager LP7,754$1.29M0.02%new13F-HRTimeline
Centiva Capital, LP7,530$1.25M0.07%new13F-HRTimeline
ALGERT GLOBAL LLC7,310$1.22M0.03%new13F-HR/ATimeline
XPONANCE LLC7,101$1.18M0.01%+7613F-HRTimeline
Versor Investments LP6,978$1.16M0.19%new13F-HRTimeline
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…6,791$1.13M<0.01%+39913F-HRTimelineGroup
RFG Advisory, LLC6,780$1.13M0.03%+2,87513F-HRTimeline
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …6,405$1.07M<0.01%new13F-HRTimelineGroup
Sigma Planning Corp6,365$1.06M0.03%+3,00013F-HRTimeline
GUGGENHEIM CAPITAL LLCin group GUGGENHEIM CAPITAL LLC6,356$1.06M0.01%-66513F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\6,309$1.05M<0.01%+9213F-HRTimelineGroup
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/6,128$1.02M<0.01%+1713F-HRTimelineGroup
Polar Capital Holdings Plcin group Polar Capital Holdings Plc6,023$1M0.01%013F-HRTimelineGroup
Bayesian Capital Management, LP6,000$1000K0.17%new13F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…5,684$947K<0.01%+99913F-HRTimelineGroup
PRELUDE CAPITAL MANAGEMENT, LLC5,659$943K0.1%new13F-HRTimeline
Pathstone Holdings, LLCin group Pathstone Holdings, LLC5,495$915K<0.01%-2513F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…5,426$904K<0.01%new13F-HRTimelineGroup
EntryPoint Capital, LLC5,368$894K0.41%new13F-HRTimeline
B.O.S.S. Retirement Advisors, LLC5,332$888K0.26%013F-HRTimeline
Legato Capital Management LLC5,245$874K0.12%new13F-HRTimeline
State of Alaska, Department of Revenue5,204$866K0.01%+13513F-HRTimeline
Eukles Asset Management5,116$852K0.37%-55413F-HRTimeline
LPL Financial LLC5,056$842K<0.01%+74613F-HRTimeline
COMMERCE BANKin group COMMERCE BANK5,024$837K0.01%+12413F-HRTimelineGroup
LANDSCAPE CAPITAL MANAGEMENT, L.L.C.in group LANDSCAPE CAPITAL MANAGEMENT,…4,998$833K0.07%-58813F-HRTimelineGroup
Caprock Group, LLC4,913$819K0.02%new13F-HRTimeline
Point72 Hong Kong Ltd4,852$808K0.06%new13F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…4,841$807K<0.01%013F-HRTimeline
Orion Porfolio Solutions, LLC4,767$794K0.01%-1113F-HRTimeline
Orion Portfolio Solutions, LLC4,767$794K0.01%-1113F-HR/ATimeline
HighTower Advisors, LLC4,550$758K<0.01%-2,26313F-HRTimeline
NEOS Investment Management LLC4,543$757K0.01%-5,03713F-HRTimeline
Tema ETFs LLC4,543$757K0.23%-5,03713F-HRTimeline
Quantitative Investment Management, LLC4,462$743K0.07%-48013F-HRTimeline
Assenagon Asset Management S.A.4,379$730K<0.01%-211,67213F-HRTimeline