Masimo Corporation
US ˙ NasdaqGS ˙ US5747951003

SecurityMASI / Masimo Corporation
InstitutionSignaturefd, Llc
Latest Disclosed Ownership346 shares
Latest Disclosed Value $ 61,543
Signaturefd, Llc reports 15.20% decrease in ownership of MASI / Masimo Corporation

On April 7, 2026 - Signaturefd, Llc filed a 13F-HR form disclosing ownership of 346 shares of Masimo Corporation (US:MASI) valued at $61,543 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 20, 2026 disclosing 408 shares of Masimo Corporation. This represents a change in shares of -15.20% during the quarter. The current value of the position is $61,872 USD.

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)
2026-04-07 2026-03-31 13F MASIMO COM 574795100 346 -62 -15.20 62 15.09 0.0009
2026-01-20 2025-12-31 13F MASIMO COM 574795100 408 26 6.81 53 -5.36 0.0008
2025-10-21 2025-09-30 13F MASIMO COM 574795100 382 -2 -0.52 56 -12.50 0.0009
2025-07-16 2025-06-30 13F MASIMO COM 574795100 384 -34 -8.13 65 -7.25 0.0011
2025-05-02 2025-03-31 13F MASIMO COM 574795100 418 -5 -1.18 70 0.00 0.0013
2025-02-10 2024-12-31 13F MASIMO COM 574795100 423 20 4.96 70 30.19 0.0013
2024-10-21 2024-09-30 13F MASIMO COM 574795100 403 -20 -4.73 54 0.00 0.0010
2024-07-29 2024-06-30 13F MASIMO COM 574795100 423 -21 -4.73 53 -18.46 0.0011
2024-05-03 2024-03-31 13F MASIMO COM 574795100 444 43 10.72 65 38.30 0.0014
2024-02-01 2023-12-31 13F MASIMO COM 574795100 401 -23 -5.42 47 27.03 0.0011
2023-11-03 2023-09-30 13F MASIMO COM 574795100 424 -540 -56.02 37 -76.58 0.0010
2023-08-01 2023-06-30 13F MASIMO COM 574795100 964 -65 -6.32 159 -16.40 0.0041
2023-04-28 2023-03-31 13F MASIMO COM 574795100 1,029 -8 -0.77 190 23.53 0.0052
2023-01-30 2022-12-31 13F MASIMO COM 574795100 1,037 -484 -31.82 153 -28.84 0.0045
2022-11-08 2022-09-30 13F MASIMO COM 574795100 1,521 -54 -3.43 215 4.37 0.0074
2022-08-10 2022-06-30 13F MASIMO COM 574795100 1,575 -96 -5.75 206 -15.23 0.0070
2022-05-02 2022-03-31 13F MASIMO COM 574795100 1,671 918 121.91 243 10.45 0.0073
2022-01-25 2021-12-31 13F MASIMO COM 574795100 753 43 6.06 220 14.58 0.0068
2021-10-28 2021-09-30 13F MASIMO COM 574795100 710 202 39.76 192 56.10 0.0066
2021-07-26 2021-06-30 13F MASIMO COM 574795100 508 -37 -6.79 123 -1.60 0.0049
2021-04-30 2021-03-31 13F MASIMO COM 574795100 545 43 8.57 125 -7.41 0.0055
2021-02-11 2020-12-31 13F MASIMO COM 574795100 502 65 14.87 135 31.07 0.0064
2020-11-03 2020-09-30 13F MASIMO COM 574795100 437 -84 -16.12 103 -13.45 0.0055
2020-07-30 2020-06-30 13F MASIMO COM 574795100 521 65 14.25 119 46.91 0.0072
2020-04-23 2020-03-31 13F MASIMO COM 574795100 456 121 36.12 81 52.83 0.0070
2020-02-05 2019-12-31 13F MASIMO COM 574795100 335 -7 -2.05 53 3.92 0.0039
2019-10-16 2019-09-30 13F MASIMO COM 574795100 342 15 4.59 51 4.08 0.0042
2019-07-31 2019-06-30 13F MASIMO COM 574795100 327 47 16.79 49 25.64 0.0042
2019-05-09 2019-03-31 13F MASIMO COM 574795100 280 27 10.67 39 44.44 0.0033
2019-02-13 2018-12-31 13F MASIMO COM 574795100 253 43 20.48 27 3.85 0.0025
2018-11-14 2018-09-30 13F MASIMO COM 574795100 210 0 0.00 26 23.81 0.0026
2018-08-14 2018-06-30 13F MASIMO COM 574795100 210 41 24.26 21 40.00 0.0023
2018-05-08 2018-03-31 13F MASIMO COM 574795100 169 169 15 0.0018
2016-05-12 2016-03-31 13F MASIMO COM 574795100 0 0 0 0.0000
2015-10-23 2015-09-30 13F MASIMO COM 574795100 0 -909 -100.00 0 -100.00
2015-07-15 2015-06-30 13F MASIMO COM 574795100 909 909 35 0.0076
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.