Masimo Corp (NASDAQ:MASI) has 380 institutional investors with active 13F positions as of December 2025.
| Owner Name | Date | Shares Held | Change (QoQ) | Change (%) | Value (USD) |
|---|---|---|---|---|---|
| BlackRock, Inc. | 31 Mar, 2026 | 4,644,578 | -4,211,041 | -47.55% | $826,131,120.00 |
| Politan Capital Management LP | 31 Mar, 2026 | 4,589,648 | 0 | 0.00% | $816,360,690.00 |
| Pentwater Capital Management LP | 31 Mar, 2026 | 3,176,000 | 3,176,000 | 0.00% | $564,915,120.00 |
| Barclays Plc | 31 Mar, 2026 | 2,743,985 | 2,685,627 | 4,601.99% | $488,072,611.00 |
| HBK INVESTMENTS L P | 31 Mar, 2026 | 2,576,109 | 2,576,109 | 0.00% | $458,212,508.00 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 31 Mar, 2026 | 2,342,790 | -321,085 | -12.05% | $416,692,672.00 |
| VANGUARD CAPITAL MANAGEMENT LLC | 31 Mar, 2026 | 2,050,045 | 2,050,045 | 0.00% | $364,641,504.00 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 31 Mar, 2026 | 2,006,861 | 2,006,861 | 0.00% | $356,960,366.00 |
| FMR LLC | 31 Mar, 2026 | 1,450,823 | -6,413,341 | -81.55% | $258,057,947.00 |
| State Street Corp | 31 Mar, 2026 | 1,437,724 | 22,528 | 1.59% | $255,727,968.00 |
| MILLENNIUM MANAGEMENT LLC | 31 Mar, 2026 | 988,853 | 800,888 | 426.08% | $175,887,283.00 |
| Goldman Sachs Group Inc | 31 Mar, 2026 | 984,192 | -289,204 | -22.71% | $175,058,231.00 |
| GEODE CAPITAL MANAGEMENT, LLC | 31 Mar, 2026 | 956,736 | 2,760 | 0.29% | $170,210,661.00 |
| AQR CAPITAL MANAGEMENT LLC | 31 Mar, 2026 | 831,966 | -259,360 | -23.77% | $147,399,452.00 |
| BALYASNY ASSET MANAGEMENT L.P. | 31 Mar, 2026 | 770,986 | 770,986 | 0.00% | $137,135,280.00 |
| Morgan Stanley | 31 Mar, 2026 | 752,417 | -168,318 | -18.28% | $133,832,703.00 |
| Liontrust Investment Partners LLP | 31 Mar, 2026 | 627,796 | 0 | 0.00% | $81,651,148.00 |
| Jpmorgan Chase & Co | 31 Mar, 2026 | 572,645 | 454,847 | 386.12% | $101,541,410.00 |
| Citigroup Inc | 31 Mar, 2026 | 533,388 | 412,157 | 339.98% | $94,873,724.00 |
| SG Americas Securities, LLC | 31 Mar, 2026 | 522,824 | 506,395 | 3,082.32% | $92,995.00 |