Masimo Corporation
MX ˙ BMV ˙ US5747951003
SecurityMX:MASI / Masimo Corporation
InstitutionLegal & General Group Plc
Latest Disclosed Ownership62,545 shares
Latest Disclosed Value $ 11,124,875
Legal & General Group Plc reports 32.34% decrease in ownership of MASI / Masimo Corporation

On May 8, 2026 - Legal & General Group Plc filed a 13F-HR form disclosing ownership of 62,545 shares of Masimo Corporation (MX:MASI) valued at $11,124,875 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 92,436 shares of Masimo Corporation. This represents a change in shares of -32.34% 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)
2026-05-08 2026-03-31 13F MASIMO COM 574795100 62,545 -29,891 -32.34 11,125 -7.47 0.0026
2026-02-09 2025-12-31 13F MASIMO COM 574795100 92,436 -10,241 -9.97 12,022 -20.64 0.0027
2025-11-13 2025-09-30 13F MASIMO COM 574795100 102,677 -1,687 -1.62 15,150 -13.71 0.0034
2025-08-12 2025-06-30 13F MASIMO COM 574795100 104,364 4,822 4.84 17,556 5.87 0.0044
2025-05-15 2025-03-31 13F MASIMO COM 574795100 99,542 2,355 2.42 16,584 3.22 0.0045
2025-02-13 2024-12-31 13F MASIMO COM 574795100 97,187 3,122 3.32 16,065 28.10 0.0043
2025-02-28 2024-09-30 13F/A-2 MASIMO COM 574795100 94,065 962 1.03 12,542 6.96 0.0033
2024-11-14 2024-09-30 13F/A-1 MASIMO COM 574795100 98,870 962 13,182 0.0027
2024-11-14 2024-09-30 13F MASIMO COM 574795100 98,870 962 13,182 0.0014
2025-05-29 2024-06-30 13F/A-1 MASIMO COM 574795100 93,103 -6,670 -6.69 11,725 -19.97 0.0033
2024-08-14 2024-06-30 13F MASIMO COM 574795100 97,908 -1,865 12,331 0.0028
2025-05-29 2024-03-31 13F/A-2 MASIMO COM 574795100 99,773 -91,425 -47.82 14,652 -34.62 0.0042
2024-07-01 2024-03-31 13F/A-1 MASIMO COM 574795100 99,773 -91,425 14,652 0.0034
2024-05-14 2024-03-31 13F MASIMO COM 574795100 92,597 -98,601 13,598 0.0016
2025-05-29 2023-12-31 13F/A-1 MASIMO COM 574795100 191,198 -10,481 -5.20 22,410 26.73 0.0070
2024-02-15 2023-12-31 13F MASIMO COM 574795100 191,198 -10,481 22,410 0.0058
2023-11-14 2023-09-30 13F MASIMO COM 574795100 201,679 -100,917 -33.35 17,683 -64.49 0.0062
2023-08-14 2023-06-30 13F MASIMO COM 574795100 302,596 -26,380 -8.02 49,792 -17.98 0.0162
2023-05-15 2023-03-31 13F MASIMO COM 574795100 328,976 -1,199 -0.36 60,709 24.28 0.0217
2023-02-14 2022-12-31 13F MASIMO COM 574795100 330,175 -13,363 -3.89 48,849 0.73 0.0188
2022-11-14 2022-09-30 13F MASIMO COM 574795100 343,538 -15,700 -4.37 48,493 3.31 0.0189
2022-08-22 2022-06-30 13F MASIMO COM 574795100 359,238 -50,501 -12.33 46,941 -21.28 0.0166
2022-05-16 2022-03-31 13F MASIMO COM 574795100 409,739 9,852 2.46 59,633 -49.07 0.0181
2022-02-14 2021-12-31 13F MASIMO COM 574795100 399,887 -27,992 -6.54 117,077 1.08 0.0354
2021-11-15 2021-09-30 13F MASIMO COM 574795100 427,879 -10,703 -2.44 115,831 8.93 0.0377
2021-08-12 2021-06-30 13F MASIMO COM 574795100 438,582 -20,498 -4.47 106,334 0.86 0.0356
2021-05-17 2021-03-31 13F MASIMO COM 574795100 459,080 13,250 2.97 105,432 -11.88 0.0393
2021-02-12 2020-12-31 13F MASIMO COM 574795100 445,830 31,813 7.68 119,652 22.43 0.0469
2020-11-13 2020-09-30 13F MASIMO COM 574795100 414,017 118,105 39.91 97,732 45.01 0.0437
2020-08-14 2020-06-30 13F MASIMO COM 574795100 295,912 183,930 164.25 67,396 240.06 0.0326
2020-05-14 2020-03-31 13F MASIMO COM 574795100 111,982 9,036 8.78 19,819 21.80 0.0116
2020-02-13 2019-12-31 13F MASIMO COM 574795100 102,946 12,998 14.45 16,272 21.57 0.0078
2019-08-14 2019-06-30 13F MASIMO COM 574795100 89,948 29,225 48.13 13,385 59.42 0.0072
2019-05-15 2019-03-31 13F MASIMO COM 574795100 60,723 1,425 2.40 8,396 31.87 0.0048
2019-02-15 2018-12-31 13F MASIMO COM 574795100 59,298 5,265 9.74 6,367 -5.39 0.0049
2018-11-20 2018-09-30 13F MASIMO COM 574795100 54,033 1,480 2.82 6,730 31.14 0.0048
2018-08-10 2018-06-30 13F MASIMO COM 574795100 52,553 3,155 6.39 5,132 18.14 0.0040
2018-05-17 2018-03-31 13F MASIMO COM 574795100 49,398 6,654 15.57 4,344 19.74 0.0033
2018-02-13 2017-12-31 13F MASIMO COM 574795100 42,744 1,555 3.78 3,628 1.91 0.0026
2017-11-09 2017-09-30 13F MASIMO COM 574795100 41,189 5,566 15.62 3,560 9.54 0.0027
2017-08-03 2017-06-30 13F MASIMO COM 574795100 35,623 8,452 31.11 3,250 28.31 0.0026
2017-05-12 2017-03-31 13F MASIMO COM 574795100 27,171 -49,207 -64.43 2,533 -50.80 0.0021
2017-02-13 2016-12-31 13F MASIMO COM 574795100 76,378 35,984 89.08 5,148 114.68 0.0048
2016-10-12 2016-09-30 13F MASIMO COM 574795100 40,394 29,821 282.05 2,398 336.00 0.0024
2016-08-16 2016-06-30 13F MASIMO COM 574795100 10,573 1,335 14.45 550 45.12 0.0006
2016-05-16 2016-03-31 13F MASIMO COM 574795100 9,238 -476 -4.90 379 -6.65 0.0004
2016-02-16 2015-12-31 13F MASIMO COM 574795100 9,714 0 0.00 406 9.73 0.0005
2015-11-13 2015-09-30 13F MASIMO COM 574795100 9,714 0 0.00 370 -1.60 0.0005
2015-07-31 2015-06-30 13F MASIMO COM 574795100 9,714 1,008 11.58 376 32.39 0.0004
2015-05-14 2015-03-31 13F MASIMO COM 574795100 8,706 1,662 23.59 284 51.87 0.0003
2015-02-20 2014-12-31 13F/A-1 MASIMO COM 574795100 7,044 0 0.00 187 26.35 0.0002
2015-02-17 2014-12-31 13F MASIMO COM 574795100 7,044 0 187 0.0002
2014-11-14 2014-09-30 13F MASIMO COM 574795100 7,044 7,044 148 0.0002
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.