Security record
MASI
Masimo Corporation · Healthcare · Medical - Devices
117Tracked holders
-8Δ holders
31.18MShares held
$5.52BReported value
+10New positions
−19Exits
Momentum inputs (comparable managers):
holder breadth -6.4% ·
share flow -18.9% ·
net new positions -7.7%
— formula
Broad distribution — falling shares and fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2026
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 · Q1 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 4.64M | -47.5% | $826.13M | 0.0% | ▼ Trim | 4 | SEC ↗ ×17 |
| 2 | Barclays Plc | 2.74M | +4602.0% | $488.07M | 0.2% | ▲ Add | 2 | SEC ↗ ×4 |
| 3 | Massachusetts Financial Services Co… | 2.34M | -12.1% | $416.69M | 0.1% | ▼ Trim | 2 | SEC ↗ ×6 |
| 4 | Vanguard Capital Management Llc | 2.05M | — | $364.64M | 0.0% | n/c | 1 | SEC ↗ |
| 5 | Fidelity (FMR) ✦ | 1.45M | -81.5% | $258.06M | 0.0% | ▼ Trim | 4 | SEC ↗ ×6 |
| 6 | State Street Global Advisors ✦ (passive) | 1.44M | +1.6% | $255.73M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 7 | Millennium Management ✦ | 988.85K | +426.1% | $175.89M | 0.1% | ▲ Add | 8 | SEC ↗ |
| 8 | Goldman Sachs Group ✦ | 984.19K | +54.6% | $175.06M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 9 | Geode Capital Management ✦ (passive) | 956.74K | +0.3% | $170.21M | 0.0% | ▲ Add | 8 | SEC ↗ ×2 |
| 10 | AQR Capital Management ✦ | 831.97K | -23.8% | $147.40M | 0.1% | ▼ Trim | 7 | SEC ↗ ×7 |
| 11 | Balyasny Asset Management L.P. | 770.99K | New | $137.14M | 0.3% | New | 1 | SEC ↗ |
| 12 | Morgan Stanley ✦ | 752.42K | -18.3% | $133.83M | 0.0% | ▼ Trim | 3 | SEC ↗ ×15 |
| 13 | JPMorgan Chase ✦ | 572.64K | +386.1% | $101.54M | 0.0% | ▲ Add | 3 | SEC ↗ ×9 |
| 14 | Citigroup Inc | 533.39K | +340.0% | $94.87M | 0.1% | ▲ Add | 2 | SEC ↗ ×2 |
| 15 | FIL Ltd | 482.00K | New | $85.73M | 0.1% | New | 1 | SEC ↗ |
| 16 | Hsbc Holdings Plc | 473.43K | New | $84.27M | 0.1% | New | 1 | SEC ↗ |
| 17 | UBS Group AG | 468.26K | -21.9% | $83.29M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 18 | Neuberger Berman Group LLC | 403.31K | +7956.5% | $71.74M | 0.1% | ▲ Add | 2 | SEC ↗ ×2 |
| 19 | Northern Trust Corp | 390.44K | +2.6% | $69.45M | 0.0% | ▲ Add | 2 | SEC ↗ ×6 |
| 20 | Squarepoint Ops LLC | 389.36K | -33.3% | $69.26M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 21 | Charles Schwab Investment… | 386.90K | +6.9% | $68.82M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 22 | Capital Research Global Investors | 359.06K | -43.7% | $63.87M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 23 | Gotham Asset Management ✦ | 341.47K | -0.2% | $60.74M | 0.2% | ▼ Trim | 8 | SEC ↗ |
| 24 | Alliancebernstein L.P. | 455.35K | +739.8% | $59.22M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 25 | Corient Private Wealth LP | 321.60K | -52.8% | $57.20M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 26 | Bank of New York Mellon Corp | 306.40K | -0.7% | $54.50M | 0.0% | ▼ Trim | 2 | SEC ↗ ×13 |
| 27 | Qube Research & Technologies Ltd | 291.48K | -0.7% | $51.85M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 28 | Citadel Advisors ✦ | 281.37K | +553.5% | $50.05M | 0.0% | ▲ Add | 8 | SEC ↗ ×2 |
| 29 | Hrt Financial Lp | 264.84K | +185.5% | $47.11M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 30 | Amundi | 243.14K | +454.4% | $43.25M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 31 | Renaissance Technologies ✦ | 239.50K | +299.8% | $42.60M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 32 | Bank Of America Corp /De/ | 232.00K | -18.5% | $41.27M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 33 | Canada Pension Plan Investment Board | 209.50K | +444.2% | $37.26M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 34 | American Century Companies Inc | 188.07K | +5.2% | $33.45M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 35 | Arrowstreet Capital ✦ | 172.59K | New | $30.70M | 0.0% | New | 1 | SEC ↗ |
| 36 | Raymond James Financial Inc | 170.53K | -8.6% | $30.33M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 37 | Man Group plc | 166.24K | +12.8% | $29.57M | 0.1% | ▲ Add | 2 | SEC ↗ ×2 |
| 38 | Dimensional Fund Advisors Lp | 164.40K | -5.5% | $29.24M | 0.0% | ▼ Trim | 2 | SEC ↗ ×4 |
| 39 | Bank Of Nova Scotia | 152.58K | +2808.0% | $27.14M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 40 | Tudor Investment Corp Et Al | 143.88K | +785.9% | $25.59M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 41 | Grantham, Mayo, Van Otterloo & Co.… | 137.62K | -4.3% | $24.48M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 42 | UBS AM, a distinct business unit of… | 133.69K | +12.4% | $23.78M | 0.0% | ▲ Add | 2 | SEC ↗ ×9 |
| 43 | Rhumbline Advisers | 129.62K | +4.1% | $23.06M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 44 | Nuveen, LLC | 111.54K | -50.2% | $19.84M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 45 | Nomura Holdings Inc | 109.39K | New | $19.46M | 0.2% | New | 1 | SEC ↗ ×2 |
| 46 | Principal Financial Group Inc | 102.72K | +5.0% | $18.27M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 47 | Soros Fund Management ✦ | 100.84K | New | $17.94M | 0.3% | New | 1 | SEC ↗ |
| 48 | Schroder Investment Management Group | 96.18K | — | $17.05M | 0.0% | n/c | 1 | SEC ↗ |
| 49 | GAMCO Investors ✦ | 92.00K | +10.8% | $16.36M | 0.2% | ▲ Add | 8 | SEC ↗ |
| 50 | Marshall Wace ✦ | 90.66K | -58.7% | $16.13M | 0.0% | ▼ Trim | 6 | SEC ↗ ×3 |
| 51 | Swiss National Bank | 90.30K | -0.9% | $16.06M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 52 | Deutsche Bank Ag\ | 89.39K | +1227.0% | $15.90M | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 53 | California Public Employees… | 77.40K | +22.2% | $13.77M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 54 | Invesco Ltd. | 69.14K | -78.3% | $12.30M | 0.0% | ▼ Trim | 2 | SEC ↗ ×5 |
| 55 | Healthcare Of Ontario Pension Plan… | 67.60K | New | $12.02M | 0.0% | New | 1 | SEC ↗ |
| 56 | Ameriprise Financial Inc | 65.20K | -86.1% | $11.60M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 57 | Legal & General Group Plc | 62.55K | -32.3% | $11.12M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 58 | Mariner, LLC | 61.27K | +185.6% | $10.90M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 59 | California State Teachers… | 53.29K | +21.6% | $9.48M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 60 | Tidal Investments LLC | 49.72K | -41.7% | $8.84M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 61 | T. Rowe Price ✦ | 45.83K | -78.5% | $8.15M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 62 | State Board Of Administration Of… | 39.65K | -0.2% | $7.05M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 63 | Cerity Partners LLC | 38.82K | +63.3% | $6.90M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 64 | Cwm, Llc | 34.69K | +87.2% | $6.17M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 65 | Storebrand Asset Management As | 27.71K | 0.0% | $4.93M | 0.0% | Held | 2 | SEC ↗ |
| 66 | New York State Common Retirement… | 24.16K | 0.0% | $4.30M | 0.0% | Held | 2 | SEC ↗ |
| 67 | Manufacturers Life Insurance… | 23.64K | -28.8% | $4.20M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 68 | Creative Planning | 22.92K | +34.0% | $4.08M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 69 | Quantinno Capital Management LP | 22.50K | +69.8% | $4.00M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 70 | Janus Henderson Group Plc | 20.00K | 0.0% | $3.56M | 0.0% | Held | 2 | SEC ↗ |
| 71 | D. E. Shaw & Co. ✦ | 19.79K | -70.0% | $3.52M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 72 | Mercer Global Advisors Inc /Adv | 18.14K | +67.0% | $3.23M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 73 | LMR Partners LLP | 16.30K | New | $2.90M | 0.0% | New | 1 | SEC ↗ |
| 74 | Brown Advisory Inc | 14.73K | -0.8% | $2.62M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 75 | Wealth Enhancement Advisory… | 16.84K | +48.1% | $2.56M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 76 | Baird Financial Group, Inc. | 14.19K | -53.7% | $2.52M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 77 | Empower Advisory Group, LLC | 14.11K | +7.6% | $2.51M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 78 | Sei Investments Co | 13.20K | +71.0% | $2.35M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 79 | Envestnet Asset Management Inc | 12.60K | -25.8% | $2.24M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 80 | Zurcher Kantonalbank (Zurich… | 12.14K | +25.2% | $2.16M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 81 | Fifth Third Bancorp | 11.74K | +1934.0% | $2.09M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 82 | Wells Fargo & Company/Mn | 11.34K | -39.4% | $2.02M | 0.0% | ▼ Trim | 2 | SEC ↗ ×4 |
| 83 | Bnp Paribas Financial Markets | 10.99K | +46.0% | $1.96M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 84 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 10.19K | -24.8% | $1.81M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 85 | LPL Financial LLC | 8.36K | +11.2% | $1.49M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 86 | Rockefeller Capital Management L.P. | 7.97K | -90.8% | $1.42M | 0.0% | ▼ Trim | 2 | SEC ↗ ×5 |
| 87 | Victory Capital Management Inc | 7.71K | -21.6% | $1.37M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 88 | Pacer Advisors, Inc. | 7.62K | +3.5% | $1.35M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 89 | Focus Partners Wealth | 7.25K | +32.4% | $1.29M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 90 | Connor, Clark & Lunn Investment… | 7.20K | +347.0% | $1.28M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 91 | State Of Wisconsin Investment Board | 7.19K | -63.1% | $1.28M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 92 | Pictet Asset Management Holding SA | 7.02K | +7.3% | $1.25M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 93 | Captrust Financial Advisors | 6.11K | +58.5% | $1.09M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 94 | Universal- Beteiligungs- und… | 5.70K | -2.0% | $1.01M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 95 | Bank Of Montreal /Can/ | 5.63K | +13.1% | $1.00M | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 96 | Pnc Financial Services Group, Inc. | 5.11K | -29.9% | $908,383 | 0.0% | ▼ Trim | 2 | SEC ↗ ×7 |
| 97 | HighTower Advisors, LLC | 5.02K | +34.1% | $893,619 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 98 | Franklin Resources Inc | 4.44K | +1.2% | $789,031 | 0.0% | ▲ Add | 2 | SEC ↗ ×7 |
| 99 | Voya Investment Management Llc | 4.40K | -0.3% | $782,450 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 100 | Russell Investments Group, Ltd. | 4.36K | -5.8% | $776,046 | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Balyasny Asset Management L.P. | $137.14M | 0.3% |
| FIL Ltd | $85.73M | 0.1% |
| Hsbc Holdings Plc | $84.27M | 0.1% |
| Arrowstreet Capital | $30.70M | 0.0% |
| Nomura Holdings Inc | $19.46M | 0.2% |
| Soros Fund Management | $17.94M | 0.3% |
| Healthcare Of Ontario Pension… | $12.02M | 0.0% |
| LMR Partners LLP | $2.90M | 0.0% |
Exited
| Alyeska Investment Group, L.P. | $163.79M | was 0.5% |
| Viking Global Investors | $66.90M | was 0.2% |
| Norges Bank | $49.09M | was 0.0% |
| Bamco Inc /Ny/ | $48.63M | was 0.1% |
| Td Asset Management Inc | $14.89M | was 0.0% |
| Swedbank AB | $7.74M | was 0.0% |
| Assenagon Asset Management… | $6.96M | was 0.0% |
| Nordea Investment Management… | $3.69M | was 0.0% |
| Susquehanna International… | $2.19M | was 0.0% |
| Kayne Anderson Rudnick… | $2.07M | was 0.0% |
| Sumitomo Mitsui Trust Group… | $1.90M | was 0.0% |
| Wellington Management | $1.02M | 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: Q1 2026 ·
Methodology ·
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