Masimo Corporation
MX ˙ BMV ˙ US5747951003
SecurityMX:MASI / Masimo Corporation
InstitutionGeode Capital Management, Llc
Latest Disclosed Ownership956,736 shares
Latest Disclosed Value $ 170,210,661
Geode Capital Management, Llc reports 0.29% increase in ownership of MASI / Masimo Corporation

On May 15, 2026 - Geode Capital Management, Llc filed a 13F-HR form disclosing ownership of 956,736 shares of Masimo Corporation (MX:MASI) valued at $170,210,661 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 953,976 shares of Masimo Corporation. This represents a change in shares of 0.29% 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 956,736 2,760 0.29 170,211 37.16 0.0057
2026-02-09 2025-12-31 13F MASIMO COM 574795100 953,976 11,537 1.22 124,096 -10.77 0.0077
2025-11-12 2025-09-30 13F MASIMO COM 574795100 942,439 46,021 5.13 139,080 -7.78 0.0089
2025-08-08 2025-06-30 13F MASIMO COM 574795100 896,418 52,100 6.17 150,817 7.19 0.0106
2025-05-13 2025-03-31 13F MASIMO COM 574795100 844,318 43,193 5.39 140,703 6.22 0.0111
2025-02-12 2024-12-31 13F MASIMO COM 574795100 801,125 8,239 1.04 132,465 25.27 0.0103
2024-11-12 2024-09-30 13F MASIMO COM 574795100 792,886 11,984 1.53 105,741 7.49 0.0086
2024-08-09 2024-06-30 13F MASIMO COM 574795100 780,902 26,742 3.55 98,372 -11.19 0.0086
2024-05-13 2024-03-31 13F MASIMO COM 574795100 754,160 30,224 4.17 110,770 30.52 0.0102
2024-02-13 2023-12-31 13F MASIMO COM 574795100 723,936 24,183 3.46 84,866 38.30 0.0089
2023-11-13 2023-09-30 13F MASIMO COM 574795100 699,753 -58,853 -7.76 61,364 -50.77 0.0073
2023-08-11 2023-06-30 13F MASIMO COM 574795100 758,606 32,588 4.49 124,642 -6.84 0.0146
2023-05-15 2023-03-31 13F MASIMO COM 574795100 726,018 22,822 3.25 133,789 129,792.23 0.0174
2023-02-13 2022-12-31 13F MASIMO COM 574795100 703,196 31,667 4.72 104 -99.89 0.0146
2022-11-14 2022-09-30 13F MASIMO COM 574795100 671,529 -23,481 -3.38 94,719 4.42 0.0144
2022-08-12 2022-06-30 13F MASIMO COM 574795100 695,010 8,626 1.26 90,707 -9.07 0.0133
2022-05-13 2022-03-31 13F MASIMO COM 574795100 686,384 23,610 3.56 99,750 -48.52 0.0125
2022-02-11 2021-12-31 13F MASIMO COM 574795100 662,774 13,952 2.15 193,760 10.48 0.0233
2021-11-12 2021-09-30 13F MASIMO COM 574795100 648,822 -313 -0.05 175,374 11.60 0.0236
2021-08-13 2021-06-30 13F MASIMO COM 574795100 649,135 37,507 6.13 157,148 12.03 0.0217
2021-05-12 2021-03-31 13F MASIMO COM 574795100 611,628 29,170 5.01 140,276 -10.15 0.0215
2021-02-12 2020-12-31 13F MASIMO COM 574795100 582,458 24,667 4.42 156,115 18.68 0.0262
2020-11-13 2020-09-30 13F MASIMO COM 574795100 557,791 -7,465 -1.32 131,540 2.16 0.0258
2020-08-13 2020-06-30 13F MASIMO COM 574795100 565,256 -7,258 -1.27 128,762 26.98 0.0275
2020-05-14 2020-03-31 13F MASIMO COM 574795100 572,514 18,062 3.26 101,403 15.71 0.0264
2020-02-20 2019-12-31 13F/A-1 MASIMO COM 574795100 554,452 -44,507 -7.43 87,636 -1.66 0.0183
2020-02-13 2019-12-31 13F MASIMO COM 574795100 554,452 -44,507 87,636 11,168.4398
2019-11-12 2019-09-30 13F MASIMO COM 574795100 598,959 8,003 1.35 89,119 1.33 0.0208
2019-08-14 2019-06-30 13F MASIMO COM 574795100 590,956 15,178 2.64 87,946 10.46 0.0213
2019-05-14 2019-03-31 13F MASIMO COM 574795100 575,778 28,751 5.26 79,618 35.56 0.0206
2019-03-06 2018-12-31 13F/A-1 MASIMO COM 574795100 547,027 69,627 14.58 58,734 -1.21 0.0182
2019-02-13 2018-12-31 13F MASIMO COM 574795100 547,027 69,627 58,734
2018-11-13 2018-09-30 13F MASIMO COM 574795100 477,400 -2,534 -0.53 59,455 26.86 0.0168
2018-08-14 2018-06-30 13F MASIMO COM 574795100 479,934 -15,652 -3.16 46,865 7.52 0.0144
2018-05-15 2018-03-31 13F MASIMO COM 574795100 495,586 -122,533 -19.82 43,586 -16.85 0.0142
2018-02-13 2017-12-31 13F MASIMO COM 574795100 618,119 -36,067 -5.51 52,416 -7.43 0.0178
2017-11-14 2017-09-30 13F MASIMO COM 574795100 654,186 5,531 0.85 56,625 -4.26 0.0209
2017-08-14 2017-06-30 13F MASIMO COM 574795100 648,655 3,401 0.53 59,144 -1.71 0.0233
2017-06-21 2017-03-31 13F/A-1 MASIMO CORP -REDH COM 574795100 645,254 173,931 36.90 60,175 89.43 0.0247
2017-05-12 2017-03-31 13F MASIMO CORP -REDH COM 574795100 645,254 60,175
2017-02-14 2016-12-31 13F MASIMO CORP -REDH COM 574795100 471,323 42,319 9.86 31,766 24.47 0.0148
2016-11-10 2016-09-30 13F MASIMO CORP -REDH COM 574795100 429,004 3,877 0.91 25,521 14.32 0.0129
2016-08-12 2016-06-30 13F MASIMO CORP -REDH COM 574795100 425,127 -1,235 -0.29 22,325 25.15 0.0121
2016-05-13 2016-03-31 13F MASIMO CORP -REDH COM 574795100 426,362 3,002 0.71 17,838 1.51 0.0095
2016-02-12 2015-12-31 13F MASIMO CORP -REDH COM 574795100 423,360 6,410 1.54 17,572 9.30 0.0100
2015-11-13 2015-09-30 13F MASIMO CORP -REDH COM 574795100 416,950 -10,363 -2.43 16,077 -2.88 0.0098
2015-08-14 2015-06-30 13F MASIMO CORP -REDH COM 574795100 427,313 11,565 2.78 16,554 20.74 0.0095
2015-05-14 2015-03-31 13F MASIMO CORP -REDH COM 574795100 415,748 -20,927 -4.79 13,711 19.21 0.0078
2015-02-12 2014-12-31 13F MASIMO CORP -REDH COM 574795100 436,675 -2,047 -0.47 11,502 23.20 0.0068
2014-11-14 2014-09-30 13F MASIMO CORP -REDH COM 574795100 438,722 -34,290 -7.25 9,336 -16.36 0.0061
2014-08-13 2014-06-30 13F MASIMO CORP -REDH COM 574795100 473,012 150,498 46.66 11,162 26.74 0.0072
2014-05-14 2014-03-31 13F MASIMO CORP -REDH COM 574795100 322,514 52,782 19.57 8,807 11.71 0.0059
2014-02-14 2013-12-31 13F MASIMO CORP -REDH COM 574795100 269,732 15,733 6.19 7,884 16.51 0.0055
2013-11-14 2013-09-30 13F MASIMO CORP -REDH COM 574795100 253,999 20,189 8.63 6,767 36.51 0.0054
2013-08-14 2013-06-30 13F MASIMO CORP -REDH COM 574795100 233,810 233,810 4,957 0.0044
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.