MASI
Masimo Corporation · Healthcare · Medical - Devices
Momentum inputs (comparable managers):
holder breadth +8.3% ·
share flow +14.5% ·
net new positions +7.7%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q4 2024
| 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 | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | State Street Global Advisors ✦ (passive) | 1.46M | — | $241.91M | 0.0% | n/c | 1 | SEC ↗ |
| 2 | Geode Capital Management ✦ (passive) | 801.12K | +1.0% | $132.47M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 3 | Geode Capital Management ✦ (passive) | 801.12K | +1.0% | $132.47M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 4 | Citadel Advisors ✦ | 441.02K | +132.7% | $72.90M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 5 | Citadel Advisors ✦ | 441.02K | +132.7% | $72.90M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 6 | Millennium Management ✦ | 408.06K | +1294.9% | $67.45M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 7 | T. Rowe Price ✦ | 250.79K | +259.7% | $41.46M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 8 | T. Rowe Price ✦ | 250.79K | +259.7% | $41.46M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 9 | Point72 Asset Management ✦ | 248.50K | New | $41.08M | 0.1% | New | 1 | SEC ↗ |
| 10 | Gotham Asset Management ✦ | 127.78K | -16.8% | $21.12M | 0.2% | ▼ Trim | 3 | SEC ↗ |
| 11 | GAMCO Investors ✦ | 84.50K | 0.0% | $13.97M | 0.1% | Held | 3 | SEC ↗ |
| 12 | Two Sigma Investments ✦ | 39.89K | -88.4% | $6.59M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 13 | Norges Bank ✦ (passive) | 33.39K | -86.9% | $5.52M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 14 | Marshall Wace ✦ | 13.29K | New | $2.20M | 0.0% | New | 1 | SEC ↗ |
| 15 | Bridgewater Associates ✦ | 11.39K | +49.5% | $1.88M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 16 | AQR Capital Management ✦ | 3.44K | -78.8% | $568,963 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 17 | AQR Capital Management ✦ | 3.44K | -78.8% | $568,963 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 18 | AQR Capital Management ✦ | 3.44K | -78.8% | $568,963 | 0.0% | ▼ Trim | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Point72 Asset Management | $41.08M | 0.1% |
| Marshall Wace | $2.20M | 0.0% |
Exited
| D. E. Shaw & Co. | $3.25M | 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.
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.