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Disclosery

MASI MASIMO CORP

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Stock (common)

433 managers (451 13F filers) reported a position in MASI shares at 2026-03-31, 54,617,693 shares in all. 125 filers opened a position and 72 filers sold out during the quarter.

Managers
433
13F filers
451
New
125
Added
140
Reduced
107
Sold out
72
Shares held by filers
54,617,693

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 2026

Filers in the available 13F reports with a share position at 2026-03-31, 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
Illinois Municipal Retirement Fund7,626$1.36M0.02%-3,73313F-HRTimeline
Pacer Advisors, Inc.7,618$1.35M<0.01%+25813F-HR/ATimeline
Pathstone Holdings, LLCin group Pathstone Holdings, LLC7,386$1.31M0.01%+27913F-HRTimelineGroup
Connor, Clark & Lunn Investment Managem…7,201$1.28M<0.01%+5,59013F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD7,189$1.28M<0.01%-12,30113F-HRTimeline
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…7,020$1.25M<0.01%+48013F-HRTimelineGroup
SummitTX Capital, L.P.7,000$1.25M0.04%+5,39713F-HRTimeline
Headlands Technologies LLC6,600$1.17M0.13%+4,25013F-HRTimeline
NAVELLIER & ASSOCIATES INC6,310$1.12M0.12%013F-HRTimeline
CAPTRUST FINANCIAL ADVISORS6,106$1.09M<0.01%+2,25413F-HRTimeline
Merit Financial Group, LLC6,097$1.08M0.01%+3,11613F-HRTimeline
Versor Investments LP6,058$1.08M2.64%+2,49413F-HRTimeline
TEACHER RETIREMENT SYSTEM OF TEXAS5,921$1.05M<0.01%new13F-HRTimeline
Redwood Investment Management, LLCin group Redwood Investment Management…5,835$1.04M0.13%-2,60013F-HR/ATimelineGroup
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …5,695$1.01M<0.01%-11713F-HRTimelineGroup
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/5,629$1M<0.01%+65313F-HRTimelineGroup
Wilmington Savings Fund Society, FSB5,370$955K0.02%-2,65413F-HRTimeline
B.O.S.S. Retirement Advisors, LLC5,337$949K0.29%013F-HRTimeline
BRIGHTON JONES LLC5,281$939K0.02%new13F-HR/ATimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…5,107$908K<0.01%-2,18013F-HRTimelineGroup
HighTower Advisors, LLC5,024$894K<0.01%+1,27713F-HRTimeline
Fieldview Capital Management, LLC4,784$851K0.25%new13F-HRTimeline
PRELUDE CAPITAL MANAGEMENT, LLC4,732$842K0.06%new13F-HRTimeline
COMMERCE BANKin group COMMERCE BANK4,731$842K<0.01%-13,14513F-HRTimelineGroup
DIVERSIFIED TRUST CO4,685$833K0.02%new13F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…4,685$833K<0.01%013F-HRTimeline
State of Alaska, Department of Revenue4,602$818K0.01%013F-HRTimeline
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC4,549$809K0.01%new13F-HRTimelineGroup
MIRABELLA FINANCIAL SERVICES LLP4,458$793K0.08%+2,90713F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources4,436$789K<0.01%+5213F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC4,399$782K<0.01%-1413F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…4,363$776K<0.01%-27013F-HRTimelineGroup
Private Advisor Group, LLC4,211$749K<0.01%-1413F-HRTimeline
EVERGREEN CAPITAL MANAGEMENT LLC4,149$738K0.02%new13F-HRTimeline
New Age Alpha Advisors, LLC4,135$735K0.03%-10313F-HRTimeline
QUADRANT CAPITAL GROUP LLC4,122$733K0.02%+37613F-HR/ATimeline
Neo Ivy Capital Management4,045$719K0.19%new13F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\3,933$700K<0.01%+16913F-HRTimelineGroup
ProShare Advisors LLC3,917$697K<0.01%+2,08713F-HRTimeline
Eukles Asset Management3,722$662K0.3%-62813F-HRTimeline
COLDSTREAM CAPITAL MANAGEMENT INC3,683$655K0.01%+72013F-HRTimeline
VERUS CAPITAL PARTNERS, LLC3,651$649K0.04%013F-HRTimeline
M&T Bank Corpin group M&T Bank Corp3,581$637K<0.01%+25713F-HR/ATimelineGroup
Curi Capital, LLC3,542$630K0.01%+39913F-HRTimeline
OXFORD FINANCIAL GROUP, LTD. LLC3,430$610K0.03%013F-HRTimeline
SECURIAN ASSET MANAGEMENT, INC3,333$593K0.02%013F-HRTimeline
Canvas Wealth Advisors, LLC3,191$568K0.1%new13F-HRTimeline
Diametric Capital, LP3,100$551K0.14%new13F-HRTimeline
Integrated Wealth Concepts LLC3,077$547K<0.01%new13F-HRTimeline
Calamos Advisors LLCgroup of 2 filers holding3,022$538KnewTimeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.2,921$520K<0.01%-75113F-HRTimelineGroup
Swiss Life Asset Management Ltdin group Swiss Life Asset Management L…2,812$500K<0.01%+63913F-HRTimelineGroup
Machina Capital S.A.S.2,761$491K0.1%new13F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA2,748$489K<0.01%-8,59213F-HRTimelineGroup
Federation des caisses Desjardins du Qu…2,739$487K<0.01%-91813F-HRTimeline
180 WEALTH ADVISORS, LLC2,728$485K0.06%+6613F-HRTimeline
HB Wealth Management, LLC2,704$481K<0.01%+36713F-HRTimeline
O'SHAUGHNESSY ASSET MANAGEMENT, LLC2,691$479K<0.01%+92913F-HRTimeline
Blueshift Asset Management, LLC2,665$474K0.14%+69913F-HRTimeline
BUCKHEAD CAPITAL MANAGEMENT LLC2,650$471K0.18%013F-HRTimeline
Crossmark Global Holdings, Inc.2,647$471K0.01%+713F-HRTimeline
Allworth Financial LP2,594$461K<0.01%+89913F-HRTimeline
Summit Trail Advisors, LLC2,551$454K0.01%-9,14513F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP2,545$451K<0.01%+2,24013F-HRTimelineGroup
NorthCrest Asset Manangement, LLC2,516$449K0.01%-61713F-HRTimeline
KCM INVESTMENT ADVISORS LLC2,515$447K0.01%013F-HRTimeline
Inspire Investing, LLCin group Inspire Investing, LLC2,497$444K0.03%+2,45913F-HRTimelineGroup
DNB Asset Management ASin group DNB Asset Management AS2,411$429K<0.01%new13F-HRTimelineGroup
Polymer Capital Management (US) LLC2,398$427K0.06%-7,12513F-HRTimeline
Utah Retirement Systems2,382$424K<0.01%013F-HRTimeline
Hardy Reed LLC2,381$424K0.03%+20913F-HRTimeline
BEESE FULMER INVESTMENT MANAGEMENT, INC.2,360$420K0.03%+35813F-HRTimeline
Fiduciary Trust Coin group Fiduciary Trust Co2,339$416K<0.01%013F-HRTimelineGroup
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK2,251$400K<0.01%+2,17113F-HRTimelineGroup
Rothschild Wealth LLC2,250$400K0.04%+50313F-HRTimeline
AlphaGrep UK Ltd2,199$391K0.12%-1,45813F-HRTimeline
Bull Harbor Capital LLC2,151$383K0.1%13F-HRTimeline
Farther Finance Advisors, LLC2,118$377K<0.01%-2613F-HRTimeline
Vident Advisory, LLCin group Vident Advisory, LLC2,103$374K<0.01%+35513F-HRTimelineGroup
ASSETMARK, INCin group ASSETMARK, INC2,068$368K<0.01%+21813F-HRTimelineGroup
Maryland State Retirement & Pension Sys…2,028$361K0.01%013F-HRTimeline
Brooklyn Investment Group2,015$358K0.01%new13F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC1,955$348K<0.01%-313F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…1,919$341K0.01%+71713F-HRTimelineGroup
MISSION WEALTH MANAGEMENT, LP1,905$339K0.01%+2013F-HRTimeline
Bridgewater Associates, LP1,899$338K<0.01%+28013F-HRTimeline
Krilogy Financial LLC1,879$335K0.01%-1,48313F-HRTimeline
TWO SIGMA SECURITIES, LLC1,875$334K0.04%-83613F-HRTimeline
BESSEMER GROUP INCin group BESSEMER GROUP INC1,857$331K<0.01%+1,71613F-HRTimelineGroup
NewEdge Advisors, LLC1,827$325K<0.01%+1,71513F-HR/ATimeline
PINNACLE ASSOCIATES LTD1,824$324K<0.01%+15713F-HRTimeline
Chicago Partners Investment Group LLC1,802$322K0.01%+613F-HRTimeline
PRAXIS INVESTMENT MANAGEMENT INC1,773$315K0.02%new13F-HRTimeline
Caprock Group, LLC1,761$313K0.01%new13F-HRTimeline
HANTZ FINANCIAL SERVICES, INC.1,762$313K<0.01%+1,10713F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
SILVER OAK SECURITIES, INCORPORATED1,755$312K0.02%-20013F-HRTimeline
Wesleyan Assurance Society1,750$311K0.02%-80013F-HRTimeline
Inscription Capital, LLC1,713$305K0.03%+14313F-HRTimeline
EVOLVE PRIVATE WEALTH, LLC1,713$305K0.02%new13F-HRTimeline
Sanctuary Advisors, LLC1,689$300K<0.01%+1713F-HRTimeline
CIBC Asset Management Inc1,669$297K<0.01%013F-HRTimeline
ARMISTICE CAPITAL, LLC1,642$292K0.01%new13F-HRTimeline
TOWNSQUARE CAPITAL LLC1,638$291K0.07%-80613F-HRTimeline
M&G PLCin group M&G PLC1,623$289K<0.01%013F-HRTimelineGroup
Caerus Investment Advisors, LLC1,526$271K0.11%new13F-HRTimeline
MML INVESTORS SERVICES, LLC1,524$271K<0.01%new13F-HRTimeline
SHELTON CAPITAL MANAGEMENT1,478$263K0.01%-11413F-HRTimeline
Andina Capital Management, LLC1,420$253K0.22%new13F-HRTimeline
Waverly Advisors, LLC1,415$252K<0.01%new13F-HRTimeline
Avior Wealth Management, LLC1,410$251K0.01%-2,38713F-HRTimeline
GUGGENHEIM CAPITAL LLCin group GUGGENHEIM CAPITAL LLC1,407$250K<0.01%new13F-HRTimelineGroup
Empowered Funds, LLC1,376$245K<0.01%new13F-HR/ATimeline
Wick Capital Partners, LLC1,326$236K0.04%new13F-HRTimeline
Pinnacle Wealth Management Advisory Gro…1,324$236K0.02%new13F-HRTimeline
Ground Swell Capital, LLC1,319$235K0.46%new13F-HRTimeline
North Dakota State Investment Board1,318$234K0.01%-28413F-HRTimeline
GenTrust, LLC1,304$232K0.01%new13F-HRTimeline
Parcion Private Wealth LLC1,291$230K0.01%new13F-HRTimeline
R Squared Ltd1,289$229K0.13%new13F-HRTimeline
UNITED CAPITAL FINANCIAL ADVISORS, LLCin group UNITED CAPITAL FINANCIAL ADVI…1,281$228K<0.01%new13F-HRTimelineGroup
FORA Capital, LLC1,280$228K0.02%-3,89413F-HRTimeline
WORLDQUANT MILLENNIUM ADVISORS LLC1,270$226K<0.01%-17,28813F-HRTimeline
KBC Group NVin group KBC Group NV1,258$224K<0.01%013F-HRTimelineGroup
Keel Point, LLC1,228$218K0.01%new13F-HRTimeline
Oak Thistle LLC1,217$216K0.02%new13F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC1,215$216K<0.01%-101,66613F-HRTimelineGroup
Essential Partners LLC1,183$210K0.07%+29613F-HRTimeline
Ballentine Partners, LLC1,177$209K<0.01%new13F-HRTimeline
Net Worth Advisory Group1,177$209K0.04%new13F-HRTimeline
Frec Markets, Inc.in group Frec Markets, Inc.1,143$203K0.03%new13F-HRTimelineGroup
WHITTIER TRUST CO1,134$202K<0.01%013F-HRTimeline
Knollwood Investment Advisory, LLC1,137$202K0.02%new13F-HRTimeline
Walleye Capital LLCgroup of 2 filers holding1,100$196K-40,949Timeline
Arax Advisory Partners1,076$191K0.01%+99813F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…1,064$189K0.01%+8813F-HR/ATimelineGroup
MAI Capital Management913$162K<0.01%+77413F-HRTimeline
Eurizon Capital SGR S.p.A.845$151K<0.01%+6113F-HRTimeline
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …782$139K<0.01%-231,78313F-HRTimelineGroup
IFP Advisors, Inc717$128K<0.01%+20813F-HRTimeline
Parallel Advisors, LLC624$111K<0.01%+34013F-HR/ATimeline
ROTHSCHILD INVESTMENT LLC606$108K0.01%+34513F-HRTimeline
GAMMA Investing LLC586$104K<0.01%+30313F-HRTimeline
Bayforest Capital Ltd521$92.7K0.1%+5713F-HRTimeline
Root Financial Partners, LLC457$81.3K<0.01%+45113F-HRTimeline
UMB Bank, n.a.444$79K<0.01%-2113F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
LONGFELLOW INVESTMENT MANAGEMENT CO LLC429$76.3K0.02%new13F-HRTimeline
DHJJ Financial Advisors, Ltd.360$64K0.02%013F-HRTimeline
Smartleaf Asset Management LLC356$63.1K<0.01%+4213F-HRTimeline
SIGNATUREFD, LLC346$61.5K<0.01%-6213F-HRTimeline
Sterling Capital Management LLC322$57.3K<0.01%-10,56313F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.317$56.5K<0.01%-16013F-HRTimelineGroup
Advisory Services Network, LLC278$49.4K<0.01%new13F-HRTimeline
Aster Capital Management (DIFC) Ltd293$48.8K0.02%+7713F-HRTimeline
SBI Securities Co., Ltd.270$48K<0.01%+413F-HRTimeline
Wealth Preservation Advisors, LLC248$44.1K0.04%new13F-HRTimeline
Blue Trust, Inc.232$41.3K<0.01%-7413F-HRTimeline
MassMutual Private Wealth & Trust, FSB220$39.1K<0.01%-313F-HRTimeline
LOS ANGELES CAPITAL MANAGEMENT LLC220$39.1K<0.01%013F-HRTimeline
Hilltop National Bank218$38.8K0.01%013F-HRTimeline
True Wealth Design, LLC172$30.6K0.01%+8813F-HRTimeline
SJS Investment Consulting Inc.162$28.8K<0.01%-1413F-HRTimeline
Activest Wealth Management158$28.1K<0.01%-2913F-HRTimeline
JPL Wealth Management, LLC156$27.7K0.01%new13F-HR/ATimeline
LANARK FINANCIAL, INC.146$26K<0.01%-5013F-HRTimeline
Strive Financial Group ,LLC120$21K0.01%013F-HRTimeline
HARBOR INVESTMENT ADVISORY, LLC100$17.8K<0.01%-52413F-HRTimeline
Fourth Dimension Wealth, LLC100$17.8K0.01%013F-HRTimeline
Steward Partners Investment Advisory, L…88$15.7K<0.01%+5313F-HRTimeline
Bell Investment Advisors, Inc81$14.4K<0.01%+6013F-HRTimeline
CENTRAL TRUST Co79$14.1K<0.01%013F-HRTimeline
Boreal Capital Management LLC75$13.3K0.01%013F-HRTimeline
Holos Integrated Wealth LLC68$12.2K0.01%013F-HRTimeline
Smithfield Trust Co65$11K<0.01%013F-HRTimeline
Investors Research Corp50$8.89K<0.01%013F-HRTimeline
Clean Yield Group49$8.72K<0.01%013F-HRTimeline
Torren Management, LLC46$8.18K<0.01%-22313F-HRTimeline
Covestor Ltd45$8K0.01%-3613F-HRTimeline
Quarry LP44$7.83K<0.01%+313F-HRTimeline
FARMERS & MERCHANTS INVESTMENTS INCin group FARMERS & MERCHANTS INVESTMEN…42$7.47K<0.01%013F-HRTimelineGroup
NISA INVESTMENT ADVISORS, LLC41$7.29K<0.01%+1113F-HRTimeline
Spire Wealth Managementin group Spire Wealth Management39$6.94K<0.01%013F-HRTimelineGroup
Basecamp Wealth Advisors LLC38$6.76K<0.01%-2413F-HRTimeline
Quent Capital, LLC37$6.58K<0.01%+213F-HRTimeline
Clearstead Advisors, LLC35$6.23K<0.01%-1,35413F-HRTimeline
HARBOUR INVESTMENTS, INC.31$5.51K<0.01%+2213F-HRTimeline
Ancora Advisors LLCin group Ancora Advisors LLC29$5.16K<0.01%013F-HRTimelineGroup
Versant Capital Management, Inc27$4.8K<0.01%013F-HRTimeline
Pinnacle Wealth Planning Services, Inc.25$4.45K<0.01%013F-HRTimeline
Sachetta, LLC23$4.09K<0.01%013F-HRTimeline
High Note Wealth, LLC21$3.73K<0.01%+1213F-HRTimeline
WealthCollab, LLC20$3.56K<0.01%013F-HRTimeline
AMERIFLEX GROUP, INC.20$3.56K<0.01%013F-HRTimeline
FIRST HORIZON CORP19$3.38K<0.01%013F-HRTimeline
ELEVATION WEALTH PARTNERS, LLC19$3.38K<0.01%+1313F-HRTimeline
Parkside Financial Bank & Trust18$3.2K<0.01%-9113F-HRTimeline
BROWN BROTHERS HARRIMAN & COin group BROWN BROTHERS HARRIMAN & CO17$3.02K<0.01%013F-HRTimelineGroup
JFS WEALTH ADVISORS, LLC17$3.02K<0.01%-113F-HRTimeline
Sunrise Financial Services, LLC17$3.02K<0.01%013F-HRTimeline
Private Wealth Management Group, LLC15$2.67K<0.01%013F-HRTimeline
TWIN PEAKS WEALTH ADVISORS, LLC15$2.67K<0.01%new13F-HRTimeline