Masimo Corporation
US ˙ NasdaqGS ˙ US5747951003

SecurityMASI / Masimo Corporation
InstitutionTd Asset Management Inc
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Td Asset Management Inc closes position in MASI / Masimo Corporation

On May 11, 2026 - Td Asset Management Inc filed a 13F-HR form disclosing ownership of 0 shares of Masimo Corporation (US:MASI) valued at $0 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 114,514 shares of Masimo Corporation. The current value of the position is $0 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)
2026-05-11 2026-03-31 13F MASIMO COM 574795100 0 -100.00 0
2026-02-10 2025-12-31 13F MASIMO COM 574795100 114,514 6,656 6.17 14,894 -6.42 0.0120
2025-11-10 2025-09-30 13F MASIMO COM 574795100 107,858 -59,318 -35.48 15,914 -43.41 0.0129
2025-07-28 2025-06-30 13F MASIMO COM 574795100 167,176 78,508 88.54 28,122 90.37 0.0240
2025-05-07 2025-03-31 13F MASIMO COM 574795100 88,668 4,028 4.76 14,772 5.59 0.0136
2025-02-11 2024-12-31 13F MASIMO COM 574795100 84,640 38,332 82.78 13,991 126.82 0.0124
2024-11-01 2024-09-30 13F MASIMO COM 574795100 46,308 12,444 36.75 6,168 44.65 0.0054
2024-08-02 2024-06-30 13F MASIMO COM 574795100 33,864 -366 -1.07 4,265 -15.16 0.0040
2024-05-08 2024-03-31 13F MASIMO COM 574795100 34,230 -45,200 -56.91 5,027 -46.01 0.0047
2024-02-12 2023-12-31 13F MASIMO COM 574795100 79,430 8,000 11.20 9,310 48.66 0.0092
2023-10-27 2023-09-30 13F MASIMO COM 574795100 71,430 53,676 302.33 6,263 114.38 0.0076
2023-08-09 2023-06-30 13F MASIMO COM 574795100 17,754 -6,070 -25.48 2,921 -33.55 0.0033
2023-05-10 2023-03-31 13F MASIMO COM 574795100 23,824 5,570 30.51 4,396 62.81 0.0053
2023-02-07 2022-12-31 13F MASIMO COM 574795100 18,254 11,348 164.32 2,701 174.67 0.0033
2022-11-07 2022-09-30 13F MASIMO COM 574795100 6,906 -5,919 -46.15 983 -41.31 0.0012
2022-08-04 2022-06-30 13F MASIMO COM 574795100 12,825 5,589 77.24 1,675 58.92 0.0019
2022-05-10 2022-03-31 13F MASIMO COM 574795100 7,236 -192,149 -96.37 1,054 -98.19 0.0006
2022-05-10 2022-03-31 13F MASIMO COM 574795100 16,105 2,344
2022-02-10 2021-12-31 13F MASIMO COM 574795100 199,385 -1,961 -0.97 58,376 7.10 0.0489
2021-11-09 2021-09-30 13F MASIMO COM 574795100 201,346 -532 -0.26 54,506 -0.88 0.0566
2021-08-11 2021-06-30 13F MASIMO COM 574795100 201,878 9,214 4.78 54,990 24.28 0.0558
2021-05-14 2021-03-31 13F MASIMO COM 574795100 192,664 -1,302 -0.67 44,247 -15.00 0.0495
2021-02-16 2020-12-31 13F MASIMO COM 574795100 193,966 11,237 6.15 52,057 20.68 0.0632
2020-11-10 2020-09-30 13F MASIMO COM 574795100 182,729 -3,240 -1.74 43,135 1.74 0.0598
2020-08-13 2020-06-30 13F MASIMO COM 574795100 185,969 -51,850 -21.80 42,399 0.66 0.0603
2020-05-15 2020-03-31 13F MASIMO COM 574795100 237,819 102,484 75.73 42,123 96.92 0.0713
2020-02-11 2019-12-31 13F MASIMO COM 574795100 135,335 56,463 71.59 21,391 82.28 0.0311
2019-11-07 2019-09-30 13F MASIMO COM 574795100 78,872 5,900 8.09 11,735 8.06 0.0179
2019-08-01 2019-06-30 13F MASIMO COM 574795100 72,972 -9,257 -11.26 10,860 -4.49 0.0163
2019-05-08 2019-03-31 13F MASIMO COM 574795100 82,229 2,288 2.86 11,371 32.48 0.0174
2019-02-01 2018-12-31 13F MASIMO COM 574795100 79,941 -17,580 -18.03 8,583 -29.33 0.0149
2018-11-01 2018-09-30 13F MASIMO COM 574795100 97,521 69,726 250.86 12,145 347.49 0.0180
2018-07-31 2018-06-30 13F MASIMO COM 574795100 27,795 27,795 2,714 0.0041
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.