BlackRock Portfolio Management LLC 13D and 13G filings for Masimo Corporation:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Shares have been adjusted for stock splits.
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2026-01-21 12:26 pm Sale | 2025-12-31 | 13G | Masimo Corporation MASI | BlackRock Portfolio Management LLC | 4,386,302 8.200% | -1,150,472 (-20.78%) | Filing |
| 2025-03-04 12:39 pm Purchase | 2025-02-28 | 13G | Masimo Corporation MASI | BlackRock Portfolio Management LLC | 5,536,774 10.300% | 5,536,774 (New Position) | Filing |