마시모 코퍼레이션
MX ˙ BMV ˙ US5747951003
SecurityMX:MASI / Masimo Corporation
InstitutionNS Partners Ltd
Latest Disclosed Ownership42,004 shares
Latest Disclosed Value $ 7,471,251
NS Partners Ltd reports 0.81% decrease in ownership of MASI / Masimo Corporation

On May 11, 2026 - NS Partners Ltd filed a 13F-HR form disclosing ownership of 42,004 shares of Masimo Corporation (MX:MASI) valued at $7,471,251 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 42,348 shares of Masimo Corporation. This represents a change in shares of -0.81% 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)
2026-05-11 2026-03-31 13F MASIMO COM 574795100 42,004 -344 -0.81 7,471 35.66 0.3345
2026-02-10 2025-12-31 13F MASIMO COM 574795100 42,348 -46 -0.11 5,508 -11.96 0.2158
2025-11-13 2025-09-30 13F MASIMO COM 574795100 42,394 -172 -0.40 6,255 -12.64 0.2420
2025-08-07 2025-06-30 13F MASIMO COM 574795100 42,566 -989 -2.27 7,160 -1.32 0.2923
2025-05-12 2025-03-31 13F MASIMO COM 574795100 43,555 906 2.12 7,256 2.94 0.3189
2025-02-07 2024-12-31 13F MASIMO COM 574795100 42,649 -388 -0.90 7,050 22.85 0.2915
2024-11-08 2024-09-30 13F MASIMO COM 574795100 43,037 986 2.34 5,738 8.37 0.2420
2024-08-08 2024-06-30 13F MASIMO COM 574795100 42,051 166 0.40 5,296 -13.90 0.2402
2024-05-09 2024-03-31 13F MASIMO COM 574795100 41,885 6,267 17.60 6,151 47.34 0.2832
2024-02-09 2023-12-31 13F MASIMO COM 574795100 35,618 -5,899 -14.21 4,175 14.67 0.2029
2023-11-13 2023-09-30 13F MASIMO COM 574795100 41,517 -104 -0.25 3,640 -46.85 0.1958
2023-08-10 2023-06-30 13F MASIMO COM 574795100 41,621 -453 -1.08 6,849 -11.80 0.3607
2023-05-10 2023-03-31 13F MASIMO COM 574795100 42,074 75 0.18 7,764 24.96 0.4366
2023-02-10 2022-12-31 13F MASIMO COM 574795100 41,999 53 0.13 6,214 4.93 0.3747
2022-11-10 2022-09-30 13F MASIMO COM 574795100 41,946 1,440 3.56 5,921 11.86 0.3841
2022-08-05 2022-06-30 13F MASIMO COM 574795100 40,506 511 1.28 5,293 -9.07 0.3213
2022-05-12 2022-03-31 13F MASIMO COM 574795100 39,995 -987 -2.41 5,821 -51.49 0.3101
2022-02-10 2021-12-31 13F MASIMO COM 574795100 40,982 6,925 20.33 11,999 30.14 0.5623
2021-11-12 2021-09-30 13F MASIMO COM 574795100 34,057 189 0.56 9,220 12.29 0.4698
2021-08-02 2021-06-30 13F MASIMO COM 574795100 33,868 -4,073 -10.74 8,211 -5.77 0.4324
2021-04-30 2021-03-31 13F MASIMO COM 574795100 37,941 235 0.62 8,714 -13.89 0.5046
2021-02-10 2020-12-31 13F MASIMO COM 574795100 37,706 331 0.89 10,120 14.70 0.5910
2020-11-12 2020-09-30 13F MASIMO COM 574795100 37,375 1,738 4.88 8,823 8.59 0.5812
2020-08-13 2020-06-30 13F MASIMO COM 574795100 35,637 34 0.10 8,125 28.85 0.6010
2020-05-13 2020-03-31 13F MASIMO COM 574795100 35,603 1,069 3.10 6,306 15.54 0.5861
2020-02-12 2019-12-31 13F Masimo COM 574795100 34,534 -60 -0.17 5,458 6.04 0.4345
2019-11-12 2019-09-30 13F Masimo COM 574795100 34,594 400 1.17 5,147 1.14 0.4639
2019-08-07 2019-06-30 13F Masimo COM 574795100 34,194 190 0.56 5,089 8.23 0.4678
2019-05-08 2019-03-31 13F Masimo COM 574795100 34,004 506 1.51 4,702 30.72 0.4357
2019-02-12 2018-12-31 13F Masimo COM 574795100 33,498 33,498 3,597 0.3851
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.