CUSIP 574795100COMMASIQ4 2025
51 filings · latest Mar 6, 2026
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Blackrock, Inc. | 8.86M | $1.15B |
| 2 | Fmr LLC | 7.86M | $1.02B |
| 3 | Politan Capital Management LP | 4.59M | $596.93M |
| 4 | Vanguard Group Inc | 4.35M | $565.60M |
| 5 | Massachusetts Financial Services Co /Ma/ | 2.66M | $346.46M |
| 6 | Naya Capital Management Uk Ltd | 1.56M | $202.98M |
| 7 | Westfield Capital Management Co LP | 1.52M | $197.96M |
| 8 | State Street Corp | 1.42M | $184.06M |
| 9 |
| 4 | Jan 21, 2026 | Blackrock Portfolio Management LLC | 13G/A | 8.2% | 4.39M | SEC |
| 5 | Nov 12, 2025 | Joe Kiani | 13G/A | 11.1% | 6.38M | SEC |
| 6 | Aug 12, 2025 | Joe Kiani | 13G/A | 11.4% | 6.58M | SEC |
| 7 | Apr 22, 2025 | Joe Kiani | 13G/A | 13.2% | 7.62M | SEC |
| 8 | Mar 4, 2025 | Blackrock Portfolio Management LLC | 13G | 10.3% | 5.54M | SEC |
| 9 | Feb 12, 2025 | Fmr LLC | 13G/A | 15.0% | 8.03M | SEC |
| 10 | Feb 7, 2025 | Blackrock, Inc. | 13G/A | 7.9% | 4.23M | SEC |
See the full Schedule 13D/13G history for Masimo Corp.
Unlock full history| Alyeska Investment Group, L.P. |
| 1.26M |
| $163.79M |
| 10 | Aqr Capital Management LLC | 1.09M | $141.94M |