Masimo Corporation
MX ˙ BMV ˙ US5747951003
SecurityMX:MASI / Masimo Corporation
InstitutionVerition Fund Management LLC
Latest Disclosed Ownership66,853 shares
Latest Disclosed Value $ 11,891,143
Verition Fund Management LLC reports 26.09% increase in ownership of MASI / Masimo Corporation

On May 15, 2026 - Verition Fund Management LLC filed a 13F-HR form disclosing ownership of 66,853 shares of Masimo Corporation (MX:MASI) valued at $11,891,143 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 53,020 shares of Masimo Corporation. This represents a change in shares of 26.09% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F MASIMO COM 574795100 66,853 13,833 26.09 11,891 72.46 0.0771
2026-02-13 2025-12-31 13F MASIMO COM 574795100 53,020 43,617 463.86 6,896 397.12 0.0271
2025-11-14 2025-09-30 13F MASIMO COM 574795100 9,403 -8,910 -48.65 1,387 -54.97 0.0057
2025-08-14 2025-06-30 13F MASIMO COM 574795100 18,313 -125,446 -87.26 3,081 -87.14 0.0137
2025-05-15 2025-03-31 13F MASIMO COM 574795100 143,759 136,278 1,821.65 23,950 1,837.70 0.1116
2025-02-14 2024-12-31 13F MASIMO COM 574795100 7,481 5,641 306.58 1,237 404.49 0.0049
2024-11-14 2024-09-30 13F MASIMO COM 574795100 1,840 1,840 245 0.0012
2024-08-14 2024-06-30 13F MASIMO COM 574795100 0 -2,578 -100.00 0 -100.00
2024-05-14 2024-03-31 13F MASIMO COM 574795100 2,578 2,578 379 0.0026
2023-02-14 2022-12-31 13F MASIMO COM 574795100 0 -2,169 -100.00 0 -100.00
2023-01-18 2022-09-30 13F/A-1 MASIMO COM 574795100 2,169 2,169 306 0.0034
2022-11-14 2022-09-30 13F MASIMO COM 574795100 2,169 2,169 306 0.0029
2022-06-02 2022-03-31 13F/A-1 MASIMO COM 574795100 0 -2,130 -100.00 0 -100.00
2022-05-13 2022-03-31 13F MASIMO COM 574795100 0 -2,130 0
2022-05-03 2021-12-31 13F/A-1 MASIMO COM 574795100 2,130 2,130 624 0.0043
2022-02-14 2021-12-31 13F MASIMO COM 574795100 2,130 2,130 624 0.0040
2021-08-16 2021-06-30 13F MASIMO COM 574795100 0 -1,041 -100.00 0 -100.00
2021-05-18 2021-03-31 13F MASIMO COM 574795100 1,041 1,041 239 0.0027
2020-11-16 2020-09-30 13F MASIMO COM 574795100 0 -1,907 -100.00 0 -100.00
2020-08-14 2020-06-30 13F MASIMO COM 574795100 1,907 1,907 435 0.0143
2020-05-15 2020-03-31 13F MASIMO COM 574795100 0 -1,386 -100.00 0 -100.00
2020-02-14 2019-12-31 13F MASIMO COM 574795100 1,386 1,386 219 0.0040
2019-08-14 2019-06-30 13F MASIMO COM 574795100 0 -2,669 -100.00 0 -100.00
2019-05-15 2019-03-31 13F MASIMO COM 574795100 2,669 2,669 369 0.0144
2019-02-14 2018-12-31 13F MASIMO COM 574795100 0 -3,651 -100.00 0 -100.00
2018-11-14 2018-09-30 13F MASIMO COM 574795100 3,651 -5,811 -61.41 455 -50.76 0.0163
2018-08-15 2018-06-30 13F MASIMO COM 574795100 9,462 9,462 924 0.0564
2017-11-14 2017-09-30 13F MASIMO COM 574795100 0 -2,727 -100.00 0 -100.00
2017-08-15 2017-06-30 13F MASIMO COM 574795100 2,727 -728 -21.07 249 -22.67 0.0242
2017-05-12 2017-03-31 13F MASIMO COM 574795100 3,455 -828 -19.33 322 11.42 0.0300
2017-02-14 2016-12-31 13F MASIMO COM 574795100 4,283 604 16.42 289 31.96 0.0249
2016-11-15 2016-09-30 13F MASIMO COM 574795100 3,679 -1,724 -31.91 219 -22.89 0.0235
2016-08-15 2016-06-30 13F MASIMO COM 574795100 5,403 5,403 284 0.0362
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.