Masimo Corporation
MX ˙ BMV ˙ US5747951003
SecurityMX:MASI / Masimo Corporation
InstitutionInvesco Ltd.
Latest Disclosed Ownership69,144 shares
Latest Disclosed Value $ 12,298,643
Invesco Ltd. reports 78.35% decrease in ownership of MASI / Masimo Corporation

On May 12, 2026 - Invesco Ltd. filed a 13F-HR form disclosing ownership of 69,144 shares of Masimo Corporation (MX:MASI) valued at $12,298,643 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 19, 2026 disclosing 319,308 shares of Masimo Corporation. This represents a change in shares of -78.35% 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)
2026-05-12 2026-03-31 13F MASIMO COM 574795100 69,144 -250,164 -78.35 12,299 -70.39 0.0002
2026-02-19 2025-12-31 13F MASIMO COM 574795100 319,308 -2,055 -0.64 41,529 -12.42 0.0064
2025-11-13 2025-09-30 13F MASIMO COM 574795100 321,363 84,060 35.42 47,417 18.78 0.0075
2025-08-13 2025-06-30 13F MASIMO COM 574795100 237,303 -24,055 -9.20 39,919 -8.32 0.0068
2025-05-12 2025-03-31 13F MASIMO COM 574795100 261,358 -16,602 -5.97 43,542 -5.23 0.0082
2025-02-13 2024-12-31 13F MASIMO COM 574795100 277,960 192,802 226.41 45,947 304.67 0.0085
2024-11-12 2024-09-30 13F MASIMO COM 574795100 85,158 2,107 2.54 11,354 8.56 0.0022
2024-08-13 2024-06-30 13F MASIMO COM 574795100 83,051 4,011 5.07 10,459 -9.89 0.0022
2024-05-14 2024-03-31 13F MASIMO COM 574795100 79,040 937 1.20 11,607 26.80 0.0025
2024-02-13 2023-12-31 13F MASIMO COM 574795100 78,103 -21,859 -21.87 9,154 4.45 0.0022
2023-11-13 2023-09-30 13F MASIMO COM 574795100 99,962 6,922 7.44 8,765 -42.75 0.0024
2023-08-11 2023-06-30 13F MASIMO COM 574795100 93,040 -22,780 -19.67 15,310 -28.37 0.0040
2023-05-12 2023-03-31 13F MASIMO COM 574795100 115,820 14,543 14.36 21,373 42.65 0.0060
2023-02-13 2022-12-31 13F MASIMO COM 574795100 101,277 -29,664 -22.65 14,984 -18.94 0.0044
2022-11-14 2022-09-30 13F MASIMO COM 574795100 130,941 -5,771 -4.22 18,484 3.46 0.0059
2022-08-15 2022-06-30 13F MASIMO COM 574795100 136,712 -3,679 -2.62 17,865 -12.56 0.0054
2022-05-16 2022-03-31 13F MASIMO COM 574795100 140,391 -1,167,215 -89.26 20,431 -94.66 0.0052
2022-02-14 2021-12-31 13F MASIMO COM 574795100 1,307,606 149,083 12.87 382,840 22.07 0.0923
2021-11-15 2021-09-30 13F MASIMO COM 574795100 1,158,523 8,613 0.75 313,622 12.49 0.0795
2021-08-17 2021-06-30 13F MASIMO COM 574795100 1,149,910 -338,875 -22.76 278,796 -18.46 0.0686
2021-05-17 2021-03-31 13F MASIMO COM 574795100 1,488,785 -4,615 -0.31 341,915 -14.69 0.0912
2021-02-16 2020-12-31 13F MASIMO COM 574795100 1,493,400 88,919 6.33 400,799 20.89 0.1167
2020-11-16 2020-09-30 13F MASIMO COM 574795100 1,404,481 -4,906 -0.35 331,542 3.18 0.1121
2020-08-14 2020-06-30 13F MASIMO COM 574795100 1,409,387 -72,369 -4.88 321,325 22.43 0.1149
2020-05-15 2020-03-31 13F MASIMO COM 574795100 1,481,756 77,080 5.49 262,449 18.21 0.1105
2020-02-14 2019-12-31 13F MASIMO COM 574795100 1,404,676 46,598 3.43 222,023 9.88 0.0689
2019-11-14 2019-09-30 13F MASIMO COM 574795100 1,358,078 122,570 9.92 202,068 9.90 0.0528
2019-08-14 2019-06-30 13F/A-1 MASIMO COM 574795100 1,235,508 689,534 126.29 183,868 143.54 0.0473
2019-08-14 2019-06-30 13F MASIMO COM 574795100 1,235,508 459,976 183,868
2019-05-15 2019-03-31 13F MASIMO COM 574795100 545,974 354,616 185.32 75,497 267.45 0.0255
2019-02-14 2018-12-31 13F MASIMO COM 574795100 191,358 73,681 62.61 20,546 40.20 0.0079
2018-11-14 2018-09-30 13F MASIMO COM 574795100 117,677 -2,624 -2.18 14,655 24.76 0.0046
2018-08-14 2018-06-30 13F MASIMO COM 574795100 120,301 96,806 412.03 11,747 468.59 0.0039
2018-05-15 2018-03-31 13F MASIMO COM 574795100 23,495 11,500 95.87 2,066 103.15 0.0008
2018-02-14 2017-12-31 13F MASIMO COM 574795100 11,995 -89,205 -88.15 1,017 -88.39 0.0004
2017-11-14 2017-09-30 13F MASIMO COM 574795100 101,200 -40,572 -28.62 8,760 -32.23 0.0032
2017-08-14 2017-06-30 13F MASIMO COM 574795100 141,772 79,643 128.19 12,926 123.09 0.0040
2017-05-15 2017-03-31 13F MASIMO COM 574795100 62,129 -111,820 -64.28 5,794 -50.58 0.0019
2017-02-14 2016-12-31 13F MASIMO COM 574795100 173,949 -31,701 -15.42 11,725 -4.16 0.0039
2016-11-14 2016-09-30 13F MASIMO COM 574795100 205,650 10,790 5.54 12,234 19.55 0.0042
2016-08-15 2016-06-30 13F MASIMO COM 574795100 194,860 -16,456 -7.79 10,233 15.73 0.0038
2016-05-16 2016-03-31 13F MASIMO COM 574795100 211,316 -34,317 -13.97 8,842 -13.28 0.0036
2016-02-16 2015-12-31 13F MASIMO COM 574795100 245,633 4,349 1.80 10,196 9.59 0.0041
2015-11-16 2015-09-30 13F MASIMO COM 574795100 241,284 16,195 7.19 9,304 6.70 0.0039
2015-08-14 2015-06-30 13F MASIMO COMMON 574795100 225,089 17,563 8.46 8,720 27.41 0.0034
2015-05-15 2015-03-31 13F MASIMO COMMON 574795100 207,526 74,635 56.16 6,844 95.54 0.0026
2015-02-13 2014-12-31 13F MASIMO COMMON 574795100 132,891 -9,551 -6.71 3,500 15.47 0.0014
2014-11-14 2014-09-30 13F MASIMO COMMON 574795100 142,442 -60,875 -29.94 3,031 -36.84 0.0012
2014-08-14 2014-06-30 13F MASIMO COMMON 574795100 203,317 -1,074,846 -84.09 4,799 -86.25 0.0019
2014-05-15 2014-03-31 13F MASIMO COMMON 574795100 1,278,163 2,518 0.20 34,906 -6.39 0.0142
2014-02-13 2013-12-31 13F MASIMO COMMON 574795100 1,275,645 12,744 1.01 37,287 10.83 0.0148
2013-11-13 2013-09-30 13F MASIMO COMMON 574795100 1,262,901 24,898 2.01 33,644 28.19 0.0146
2013-08-14 2013-06-30 13F MASIMO COMMON 574795100 1,238,003 1,238,003 26,245 0.0122
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.