馬西莫公司
MX ˙ BMV ˙ US5747951003
SecurityMX:MASI / Masimo Corporation
InstitutionStrs Ohio
Latest Disclosed Ownership37,213 shares
Latest Disclosed Value $ 6,619,076
Strs Ohio reports 0.81% increase in ownership of MASI / Masimo Corporation

On April 24, 2026 - Strs Ohio filed a 13F-HR form disclosing ownership of 37,213 shares of Masimo Corporation (MX:MASI) valued at $6,619,076 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 36,915 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)
2026-04-24 2026-03-31 13F MASIMO COM_STK 574795100 37,213 298 0.81 6,619 37.87 0.0263
2026-02-02 2025-12-31 13F MASIMO COM_STK 574795100 36,915 2 0.01 4,801 -11.84 0.0179
2025-10-30 2025-09-30 13F MASIMO COM_STK 574795100 36,913 -19,070 -34.06 5,447 -42.17 0.0200
2025-08-04 2025-06-30 13F MASIMO COM_STK 574795100 55,983 15,848 39.49 9,417 40.85 0.0352
2025-05-28 2025-03-31 13F MASIMO COM_STK 574795100 40,135 24,735 160.62 6,686 162.71 0.0280
2025-05-28 2024-12-31 13F MASIMO COM_STK 574795100 15,400 2,612 20.43 2,546 49.27 0.0101
2024-11-01 2024-09-30 13F MASIMO COM_STK 574795100 12,788 12,788 1,705 0.0066
2023-10-26 2023-09-30 13F/A-1 MASIMO COM 574795100 0 -6,068 -100.00 0 0.0000
2023-10-26 2023-09-30 13F MASIMO COM 574795100 0 0
2023-07-31 2023-06-30 13F MASIMO COM 574795100 6,068 -230 -3.65 1 -100.00 0.0042
2023-08-02 2023-03-31 13F/A-2 MASIMO COM 574795100 6,298 6,298 1 0.0050
2023-08-02 2023-03-31 13F/A-1 MASIMO COM 574795100 6,298 6,298 1 0.0050
2023-04-27 2023-03-31 13F MASIMO COM 574795100 6,298 6,298 1 0.0060
2022-07-25 2022-06-30 13F MASIMO COM 574795100 0 -14,094 -100.00 0 -100.00
2022-04-21 2022-03-31 13F MASIMO COM 574795100 14,094 11,788 511.19 2,051 203.85 0.0075
2022-01-24 2021-12-31 13F MASIMO COM 574795100 2,306 -36 -1.54 675 6.47 0.0023
2021-10-22 2021-09-30 13F MASIMO COM 574795100 2,342 -578 -19.79 634 -10.33 0.0024
2021-07-26 2021-06-30 13F MASIMO COM 574795100 2,920 -1,567 -34.92 707 -31.36 0.0025
2021-04-23 2021-03-31 13F MASIMO COM 574795100 4,487 -33,984 -88.34 1,030 -90.02 0.0039
2021-01-25 2020-12-31 13F MASIMO COM 574795100 38,471 -28,665 -42.70 10,324 -34.86 0.0398
2020-12-14 2020-09-30 13F MASIMO COM 574795100 67,136 -101,225 -60.12 15,848 -58.71 0.0664
2020-07-23 2020-06-30 13F MASIMO COM 574795100 168,361 -2,825 -1.65 38,384 26.60 0.1678
2020-04-23 2020-03-31 13F MASIMO COM 574795100 171,186 166,396 3,473.82 30,320 3,905.28 0.1596
2020-01-24 2019-12-31 13F MASIMO COM 574795100 4,790 1,888 65.06 757 75.64 0.0032
2019-10-21 2019-09-30 13F/A-1 MASIMO COM 574795100 2,902 183 6.73 431 6.68 0.0019
2019-10-21 2019-09-30 13F MASIMO COM 574795100 2,902 -1,888 431 1,907.6299
2019-07-25 2019-06-30 13F MASIMO COM 574795100 2,719 -33 -1.20 404 6.32 0.0018
2019-04-19 2019-03-31 13F MASIMO COM 574795100 2,752 -791 -22.33 380 0.00 0.0017
2019-01-23 2018-12-31 13F MASIMO COM 574795100 3,543 337 10.51 380 -4.76 0.0019
2018-10-19 2018-09-30 13F MASIMO COM 574795100 3,206 -361 -10.12 399 14.66 0.0017
2018-08-06 2018-06-30 13F MASIMO COM 574795100 3,567 -2,233 -38.50 348 -31.76 0.0015
2018-04-20 2018-03-31 13F MASIMO COM 574795100 5,800 -13,900 -70.56 510 -69.46 0.0023
2018-01-23 2017-12-31 13F MASIMO COM 574795100 19,700 0 0.00 1,670 -2.05 0.0071
2017-10-23 2017-09-30 13F MASIMO COM 574795100 19,700 700 3.68 1,705 -1.56 0.0073
2017-07-26 2017-06-30 13F MASIMO COM 574795100 19,000 1,100 6.15 1,732 3.77 0.0077
2017-04-26 2017-03-31 13F MASIMO COM 574795100 17,900 -3,400 -15.96 1,669 16.31 0.0072
2017-01-24 2016-12-31 13F MASIMO COM 574795100 21,300 -800 -3.62 1,435 9.21 0.0063
2016-10-27 2016-09-30 13F MASIMO COM 574795100 22,100 -2,000 -8.30 1,314 3.87 0.0059
2016-07-26 2016-06-30 13F MASIMO COM 574795100 24,100 -3,100 -11.40 1,265 11.16 0.0056
2016-04-25 2016-03-31 13F/A-1 MASIMO COM 574795100 27,200 -400 -1.45 1,138 -0.61 0.0051
2016-01-28 2015-12-31 13F MASIMO COM 574795100 27,600 -300 -1.08 1,145 6.51 0.0051
2015-10-21 2015-09-30 13F MASIMO COM 574795100 27,900 -1,800 -6.06 1,075 -6.52 0.0051
2015-08-04 2015-06-30 13F MASIMO COM 574795100 29,700 10,800 57.14 1,150 84.59 0.0050
2015-04-27 2015-03-31 13F/A-1 MASIMO COM 574795100 18,900 18,900 15.24 623 60.98 0.0027
2015-04-21 2015-03-31 13F MASIMO COM 574795100 18,900 623
2014-10-20 2014-09-30 13F MASIMO COM 574795100 0 -16,400 -100.00 0 -100.00
2014-07-24 2014-06-30 13F MASIMO COM 574795100 16,400 -22,800 -58.16 387 -63.87 0.0017
2014-04-28 2014-03-31 13F MASIMO COM 574795100 39,200 -1,200 -2.97 1,071 -9.31 0.0048
2014-01-30 2013-12-31 13F MASIMO COM 574795100 40,400 -8,300 -17.04 1,181 -8.94 0.0053
2013-10-24 2013-09-30 13F MASIMO COM 574795100 48,700 -4,200 -7.94 1,297 15.70 0.0057
2013-08-12 2013-06-30 13F MASIMO COM 574795100 52,900 52,900 1,121 0.0048
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.