Security record · archived quarter
MASI
Masimo Corporation · Healthcare · Medical - Devices
125Tracked holders
+1Δ holders
41.01MShares held
$5.33BReported value
+3New positions
−1Exits
Momentum inputs (comparable managers):
holder breadth +0.8% ·
share flow -4.1% ·
net new positions +1.6%
— formula
Ownership fragmentation — more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q4 2025
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q1 2026 | 117 | -8 | 31.18M | $5.52B | +10 | −19 |
| Q4 2025 | 125 | +1 | 41.01M | $5.33B | +3 | −1 |
| Q3 2025 | 19 | -2 | 29.69M | $4.38B | +1 | −4 |
| Q2 2025 | 19 | +1 | 27.33M | $4.60B | +1 | — |
| Q1 2025 | 15 | +2 | 3.43M | $572.07M | +2 | — |
| Q4 2024 | 13 | +1 | 3.93M | $649.11M | +2 | −1 |
| Q3 2024 | 11 | 0 | 1.97M | $262.13M | +2 | −2 |
| Q2 2024 | 11 | — | 3.08M | $387.70M | — | — |
Who holds it · Q4 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 8.86M | -14.5% | $1.15B | 0.0% | ▼ Trim | 3 | SEC ↗ ×16 |
| 2 | Fidelity (FMR) ✦ | 7.86M | -4.3% | $1.02B | 0.1% | ▼ Trim | 3 | SEC ↗ ×7 |
| 3 | The Vanguard Group ✦ (passive) | 4.35M | -9.6% | $565.60M | 0.0% | ▼ Trim | 3 | SEC ↗ ×6 |
| 4 | Massachusetts Financial Services Co… | 2.66M | — | $346.46M | 0.1% | n/c | 1 | SEC ↗ ×6 |
| 5 | State Street Global Advisors ✦ (passive) | 1.42M | -4.7% | $184.06M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 6 | Alyeska Investment Group, L.P. | 1.26M | — | $163.79M | 0.5% | n/c | 1 | SEC ↗ |
| 7 | AQR Capital Management ✦ | 1.09M | +3416.6% | $141.94M | 0.1% | ▲ Add | 6 | SEC ↗ ×6 |
| 8 | Geode Capital Management ✦ (passive) | 953.98K | +1.2% | $124.10M | 0.0% | ▲ Add | 7 | SEC ↗ ×2 |
| 9 | Morgan Stanley ✦ | 920.74K | +33.3% | $119.75M | 0.0% | ▲ Add | 2 | SEC ↗ ×10 |
| 10 | Corient Private Wealth LP | 681.96K | — | $88.70M | 0.1% | n/c | 1 | SEC ↗ ×3 |
| 11 | Capital Research Global Investors | 637.89K | — | $82.96M | 0.0% | n/c | 1 | SEC ↗ |
| 12 | Goldman Sachs Group ✦ | 636.70K | -14.5% | $82.81M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 13 | UBS Group AG | 599.27K | — | $77.94M | 0.0% | n/c | 1 | SEC ↗ ×4 |
| 14 | Squarepoint Ops LLC | 583.75K | — | $75.92M | 0.2% | n/c | 1 | SEC ↗ |
| 15 | Viking Global Investors ✦ | 514.34K | -52.1% | $66.90M | 0.2% | ▼ Trim | 3 | SEC ↗ |
| 16 | Ameriprise Financial Inc | 468.41K | — | $60.92M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 17 | Northern Trust Corp | 380.46K | — | $49.48M | 0.0% | n/c | 1 | SEC ↗ ×6 |
| 18 | Norges Bank ✦ (passive) | 377.42K | New | $49.09M | 0.0% | New | 1 | SEC ↗ |
| 19 | Bamco Inc /Ny/ | 373.90K | — | $48.63M | 0.1% | n/c | 1 | SEC ↗ |
| 20 | Charles Schwab Investment… | 361.90K | — | $47.07M | 0.0% | n/c | 1 | SEC ↗ |
| 21 | Gotham Asset Management ✦ | 342.19K | +165.2% | $44.51M | 0.2% | ▲ Add | 7 | SEC ↗ |
| 22 | Invesco Ltd. | 319.31K | — | $41.53M | 0.0% | n/c | 1 | SEC ↗ ×6 |
| 23 | Bank of New York Mellon Corp | 308.49K | — | $40.12M | 0.0% | n/c | 1 | SEC ↗ ×13 |
| 24 | Qube Research & Technologies Ltd | 293.54K | — | $38.18M | 0.1% | n/c | 1 | SEC ↗ |
| 25 | Bank Of America Corp /De/ | 284.70K | — | $37.03M | 0.0% | n/c | 1 | SEC ↗ ×8 |
| 26 | BNP Paribas Asset Management… | 232.56K | — | $30.25M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 27 | Nuveen, LLC | 224.07K | — | $29.14M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 28 | Marshall Wace ✦ | 219.31K | +63.5% | $28.52M | 0.0% | ▲ Add | 5 | SEC ↗ ×4 |
| 29 | T. Rowe Price ✦ | 213.59K | -58.5% | $27.78M | 0.0% | ▼ Trim | 7 | SEC ↗ ×2 |
| 30 | Millennium Management ✦ | 187.97K | +1065.2% | $24.45M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 31 | Raymond James Financial Inc | 186.51K | — | $24.26M | 0.0% | n/c | 1 | SEC ↗ ×4 |
| 32 | American Century Companies Inc | 178.76K | — | $23.25M | 0.0% | n/c | 1 | SEC ↗ |
| 33 | Dimensional Fund Advisors Lp | 173.95K | — | $22.62M | 0.0% | n/c | 1 | SEC ↗ ×4 |
| 34 | Man Group plc | 147.42K | — | $19.17M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 35 | Grantham, Mayo, Van Otterloo & Co.… | 143.82K | — | $18.71M | 0.0% | n/c | 1 | SEC ↗ |
| 36 | Rhumbline Advisers | 124.56K | — | $16.20M | 0.0% | n/c | 1 | SEC ↗ |
| 37 | Citigroup Inc | 121.23K | — | $15.77M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 38 | UBS AM, a distinct business unit of… | 118.96K | — | $15.47M | 0.0% | n/c | 1 | SEC ↗ ×9 |
| 39 | JPMorgan Chase ✦ | 117.80K | -45.4% | $15.32M | 0.0% | ▼ Trim | 2 | SEC ↗ ×7 |
| 40 | Td Asset Management Inc | 114.51K | — | $14.89M | 0.0% | n/c | 1 | SEC ↗ |
| 41 | Jane Street Group, Llc | 102.88K | — | $13.38M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 42 | Principal Financial Group Inc | 97.86K | — | $12.73M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 43 | Hrt Financial Lp | 92.78K | — | $12.07M | 0.0% | n/c | 1 | SEC ↗ |
| 44 | Legal & General Group Plc | 92.44K | — | $12.02M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 45 | Swiss National Bank | 91.10K | — | $11.85M | 0.0% | n/c | 1 | SEC ↗ |
| 46 | Rockefeller Capital Management L.P. | 86.41K | — | $11.24M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 47 | Tidal Investments LLC | 85.29K | — | $11.09M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 48 | GAMCO Investors ✦ | 83.00K | -0.9% | $10.79M | 0.1% | ▼ Trim | 7 | SEC ↗ |
| 49 | D. E. Shaw & Co. ✦ | 66.02K | New | $8.59M | 0.0% | New | 1 | SEC ↗ |
| 50 | California Public Employees… | 63.36K | — | $8.24M | 0.0% | n/c | 1 | SEC ↗ |
| 51 | Renaissance Technologies ✦ | 59.90K | New | $7.79M | 0.0% | New | 1 | SEC ↗ |
| 52 | Swedbank AB | 59.50K | — | $7.74M | 0.0% | n/c | 1 | SEC ↗ |
| 53 | Barclays Plc | 58.36K | — | $7.59M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 54 | Alliancebernstein L.P. | 54.22K | — | $7.05M | 0.0% | n/c | 1 | SEC ↗ |
| 55 | Assenagon Asset Management S.A. | 53.52K | — | $6.96M | 0.0% | n/c | 1 | SEC ↗ |
| 56 | Amundi | 43.86K | — | $5.70M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 57 | California State Teachers… | 43.82K | — | $5.70M | 0.0% | n/c | 1 | SEC ↗ |
| 58 | Citadel Advisors ✦ | 43.05K | -50.9% | $5.60M | 0.0% | ▼ Trim | 7 | SEC ↗ ×2 |
| 59 | State Board Of Administration Of… | 39.75K | — | $5.17M | 0.0% | n/c | 1 | SEC ↗ |
| 60 | Canada Pension Plan Investment Board | 38.50K | — | $5.01M | 0.0% | n/c | 1 | SEC ↗ |
| 61 | Manufacturers Life Insurance… | 33.18K | — | $4.32M | 0.0% | n/c | 1 | SEC ↗ |
| 62 | Baird Financial Group, Inc. | 30.68K | — | $3.99M | 0.0% | n/c | 1 | SEC ↗ |
| 63 | Nordea Investment Management Ab | 28.32K | — | $3.69M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 64 | Storebrand Asset Management As | 27.71K | — | $3.60M | 0.0% | n/c | 1 | SEC ↗ |
| 65 | New York State Common Retirement… | 24.16K | — | $3.14M | 0.0% | n/c | 1 | SEC ↗ |
| 66 | Cerity Partners LLC | 23.77K | — | $3.09M | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 67 | Mariner, LLC | 21.45K | — | $2.79M | 0.0% | n/c | 1 | SEC ↗ |
| 68 | Janus Henderson Group Plc | 20.00K | — | $2.60M | 0.0% | n/c | 1 | SEC ↗ |
| 69 | State Of Wisconsin Investment Board | 19.49K | — | $2.53M | 0.0% | n/c | 1 | SEC ↗ |
| 70 | Wells Fargo & Company/Mn | 18.70K | — | $2.43M | 0.0% | n/c | 1 | SEC ↗ ×4 |
| 71 | Cwm, Llc | 18.54K | — | $2.41M | 0.0% | n/c | 1 | SEC ↗ |
| 72 | Creative Planning | 17.11K | — | $2.23M | 0.0% | n/c | 1 | SEC ↗ |
| 73 | Envestnet Asset Management Inc | 16.98K | — | $2.21M | 0.0% | n/c | 1 | SEC ↗ |
| 74 | Susquehanna International Group, Llp | 16.85K | — | $2.19M | 0.0% | n/c | 1 | SEC ↗ |
| 75 | Tudor Investment Corp Et Al | 16.24K | — | $2.11M | 0.0% | n/c | 1 | SEC ↗ |
| 76 | Kayne Anderson Rudnick Investment… | 15.93K | — | $2.07M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 77 | Brown Advisory Inc | 14.85K | — | $1.93M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 78 | Sumitomo Mitsui Trust Group, Inc. | 14.57K | — | $1.90M | 0.0% | n/c | 1 | SEC ↗ |
| 79 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 13.54K | — | $1.76M | 0.0% | n/c | 1 | SEC ↗ |
| 80 | Quantinno Capital Management LP | 13.25K | — | $1.72M | 0.0% | n/c | 1 | SEC ↗ |
| 81 | Empower Advisory Group, LLC | 13.11K | — | $1.70M | 0.0% | n/c | 1 | SEC ↗ |
| 82 | Wealth Enhancement Advisory… | 11.37K | — | $1.56M | 0.0% | n/c | 1 | SEC ↗ |
| 83 | Royal Bank Of Canada | 11.34K | — | $1.47M | 0.0% | n/c | 1 | SEC ↗ ×8 |
| 84 | Mercer Global Advisors Inc /Adv | 10.86K | — | $1.41M | 0.0% | n/c | 1 | SEC ↗ |
| 85 | Victory Capital Management Inc | 9.84K | — | $1.28M | 0.0% | n/c | 1 | SEC ↗ |
| 86 | Zurcher Kantonalbank (Zurich… | 9.70K | — | $1.26M | 0.0% | n/c | 1 | SEC ↗ |
| 87 | Wellington Management ✦ | 7.83K | +257.0% | $1.02M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 88 | Sei Investments Co | 7.71K | — | $1.00M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 89 | Bnp Paribas Financial Markets | 7.53K | — | $979,222 | 0.0% | n/c | 1 | SEC ↗ |
| 90 | LPL Financial LLC | 7.51K | — | $976,966 | 0.0% | n/c | 1 | SEC ↗ |
| 91 | Pacer Advisors, Inc. | 7.36K | — | $957,242 | 0.0% | n/c | 1 | SEC ↗ |
| 92 | Pnc Financial Services Group, Inc. | 7.29K | — | $947,748 | 0.0% | n/c | 1 | SEC ↗ ×7 |
| 93 | Deutsche Bank Ag\ | 6.74K | — | $876,084 | 0.0% | n/c | 1 | SEC ↗ ×4 |
| 94 | Pictet Asset Management Holding SA | 6.54K | — | $850,592 | 0.0% | n/c | 1 | SEC ↗ |
| 95 | Universal- Beteiligungs- und… | 5.81K | — | $755,908 | 0.0% | n/c | 1 | SEC ↗ |
| 96 | Focus Partners Wealth | 5.47K | — | $711,949 | 0.0% | n/c | 1 | SEC ↗ |
| 97 | Bank Of Nova Scotia | 5.25K | — | $682,425 | 0.0% | n/c | 1 | SEC ↗ |
| 98 | Neuberger Berman Group LLC | 5.01K | — | $651,080 | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 99 | Bank Of Montreal /Can/ | 4.98K | — | $647,179 | 0.0% | n/c | 1 | SEC ↗ ×3 |
| 100 | Capstone Investment Advisors, Llc | 4.72K | — | $613,623 | 0.0% | n/c | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Norges Bank | $49.09M | 0.0% |
| D. E. Shaw & Co. | $8.59M | 0.0% |
| Renaissance Technologies | $7.79M | 0.0% |
Exited
| Adage Capital Partners | $22.13M | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 440 holders, 53.43M shares, $9.20B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q4 2025 ·
Methodology ·
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