Masimo Corporation
MX ˙ BMV ˙ US5747951003
SecurityMX:MASI / Masimo Corporation
InstitutionPrincipal Financial Group Inc
Latest Disclosed Ownership102,718 shares
Latest Disclosed Value $ 18,270,450
Principal Financial Group Inc reports 4.97% increase in ownership of MASI / Masimo Corporation

On May 4, 2026 - Principal Financial Group Inc filed a 13F-HR form disclosing ownership of 102,718 shares of Masimo Corporation (MX:MASI) valued at $18,270,450 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 97,858 shares of Masimo Corporation. This represents a change in shares of 4.97% 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)
2026-05-04 2026-03-31 13F MASIMO COM 574795100 102,718 4,860 4.97 18,270 43.55 0.0098
2026-02-02 2025-12-31 13F MASIMO COM 574795100 97,858 -4,326 -4.23 12,727 -15.59 0.0065
2025-11-04 2025-09-30 13F MASIMO COM 574795100 102,184 -283 -0.28 15,077 -12.53 0.0076
2025-08-08 2025-06-30 13F MASIMO COM 574795100 102,467 -194 -0.19 17,237 0.78 0.0091
2025-04-28 2025-03-31 13F MASIMO COM 574795100 102,661 1 0.00 17,103 0.79 0.0096
2025-01-31 2024-12-31 13F MASIMO COM 574795100 102,660 153 0.15 16,970 24.16 0.0093
2024-10-31 2024-09-30 13F MASIMO COM 574795100 102,507 -46,144 -31.04 13,667 -27.00 0.0075
2024-07-29 2024-06-30 13F MASIMO COM 574795100 148,651 -19,097 -11.38 18,721 -24.00 0.0111
2024-04-29 2024-03-31 13F MASIMO COM 574795100 167,748 3,121 1.90 24,634 27.67 0.0145
2024-02-07 2023-12-31 13F MASIMO COM 574795100 164,627 -1,160 -0.70 19,296 32.74 0.0123
2023-11-02 2023-09-30 13F MASIMO COM 574795100 165,787 -18,604 -10.09 14,536 -52.09 0.0104
2023-08-07 2023-06-30 13F MASIMO COM 574795100 184,391 -10,657 -5.46 30,342 -15.71 0.0207
2023-05-09 2023-03-31 13F MASIMO COM 574795100 195,048 808 0.42 35,994 25.25 0.0257
2023-02-09 2022-12-31 13F MASIMO COM 574795100 194,240 2,001 1.04 28,738 5.90 0.0216
2022-11-09 2022-09-30 13F MASIMO COM 574795100 192,239 -11,215 -5.51 27,137 2.08 0.0216
2022-08-10 2022-06-30 13F MASIMO COM 574795100 203,454 29,210 16.76 26,585 4.83 0.0197
2022-05-09 2022-03-31 13F MASIMO COM 574795100 174,244 -2,244 -1.27 25,360 -50.92 0.0101
2022-05-09 2022-03-31 13F MASIMO COM 574795100 169,334 24,645
2022-02-09 2021-12-31 13F MASIMO COM 574795100 176,488 -1,995 -1.12 51,672 6.94 0.0308
2021-11-09 2021-09-30 13F MASIMO COM 574795100 178,483 -634 -0.35 48,317 11.26 0.0315
2021-08-10 2021-06-30 13F MASIMO COM 574795100 179,117 1,140 0.64 43,426 6.24 0.0281
2021-05-10 2021-03-31 13F MASIMO COM 574795100 177,977 24,784 16.18 40,875 -0.58 0.0288
2021-02-23 2020-12-31 13F/A-1 MASIMO COM 574795100 153,193 376 0.25 41,114 13.97 0.0305
2021-02-08 2020-12-31 13F MASIMO COM 574795100 153,193 376 41,114 16,174.8812
2020-11-06 2020-09-30 13F MASIMO COM 574795100 152,817 -3,359 -2.15 36,074 1.31 0.0304
2020-08-05 2020-06-30 13F MASIMO COM 574795100 156,176 5,250 3.48 35,607 33.20 0.0316
2020-05-12 2020-03-31 13F MASIMO COM 574795100 150,926 -64,252 -29.86 26,732 -21.40 0.0296
2020-02-05 2019-12-31 13F MASIMO COM 574795100 215,178 -185 -0.09 34,011 6.14 0.0283
2019-11-13 2019-09-30 13F MASIMO COM 574795100 215,363 -4,484 -2.04 32,044 -2.06 0.0283
2019-08-12 2019-06-30 13F MASIMO COM 574795100 219,847 1,391 0.64 32,717 8.30 0.0294
2019-05-10 2019-03-31 13F MASIMO COM 574795100 218,456 2,379 1.10 30,209 30.21 0.0281
2019-02-14 2018-12-31 13F MASIMO COM 574795100 216,077 -1,455 -0.67 23,200 -14.36 0.0247
2018-11-14 2018-09-30 13F MASIMO COM 574795100 217,532 3,827 1.79 27,091 29.81 0.0239
2018-08-13 2018-06-30 13F MASIMO COM 574795100 213,705 3,888 1.85 20,869 13.09 0.0192
2018-05-14 2018-03-31 13F MASIMO COM 574795100 209,817 4,809 2.35 18,454 6.15 0.0177
2018-02-12 2017-12-31 13F MASIMO COM 574795100 205,008 -1,167 -0.57 17,385 -2.59 0.0160
2017-11-02 2017-09-30 13F MASIMO COM 574795100 206,175 9,617 4.89 17,847 -0.42 0.0173
2017-08-08 2017-06-30 13F MASIMO COM 574795100 196,558 -5,321 -2.64 17,922 -4.81 0.0180
2017-05-11 2017-03-31 13F MASIMO COM 574795100 201,879 -148,164 -42.33 18,827 -20.20 0.0227
2017-02-13 2016-12-31 13F MASIMO COM 574795100 350,043 19,289 5.83 23,593 19.91 0.0299
2016-11-10 2016-09-30 13F MASIMO COM 574795100 330,754 11,314 3.54 19,676 17.29 0.0260
2016-08-09 2016-06-30 13F MASIMO COM 574795100 319,440 4,158 1.32 16,776 27.18 0.0234
2016-05-10 2016-03-31 13F MASIMO COM 574795100 315,282 7,358 2.39 13,191 3.20 0.0192
2016-02-09 2015-12-31 13F MASIMO COM 574795100 307,924 8,534 2.85 12,782 10.71 0.0190
2015-11-12 2015-09-30 13F/A-1 MASIMO COM 574795100 299,390 2,178 0.73 11,545 0.27 0.0181
2015-11-09 2015-09-30 13F MASIMO COM 574795100 299,390 11,545
2015-08-10 2015-06-30 13F MASIMO COM 574795100 297,212 -7,568 -2.48 11,514 14.54 0.0172
2015-05-14 2015-03-31 13F/A-1 MASIMO COM 574795100 304,780 6,866 2.30 10,052 28.10 0.0150
2015-05-12 2015-03-31 13F MASIMO COM 574795100 304,780 10,052
2015-02-12 2014-12-31 13F MASIMO COM 574795100 297,914 -12,188 -3.93 7,847 18.91 0.0122
2014-11-13 2014-09-30 13F MASIMO COM 574795100 310,102 -14,458 -4.45 6,599 -13.85 0.0112
2014-08-12 2014-06-30 13F MASIMO COM 574795100 324,560 186,942 135.84 7,660 103.78 0.0129
2014-05-13 2014-03-31 13F MASIMO COM 574795100 137,618 6,550 5.00 3,759 -1.88 0.0067
2014-02-12 2013-12-31 13F MASIMO COM 574795100 131,068 1,649 1.27 3,831 11.14 0.0072
2013-11-05 2013-09-30 13F MASIMO COM 574795100 129,419 2,296 1.81 3,447 27.90 0.0071
2013-08-12 2013-06-30 13F MASIMO COM 574795100 127,123 127,123 2,695 0.0060
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.