Masimo Corporation
MX ˙ BMV ˙ US5747951003
SecurityMX:MASI / Masimo Corporation
InstitutionHsbc Holdings Plc
Latest Disclosed Ownership473,434 shares
Latest Disclosed Value $ 84,266,518
Hsbc Holdings Plc ownership in MASI / Masimo Corporation

On April 30, 2026 - Hsbc Holdings Plc filed a 13F-HR form disclosing ownership of 473,434 shares of Masimo Corporation (MX:MASI) valued at $84,266,518 USD as of March 31, 2026. The entity filed a previous 13F-HR on May 14, 2025 disclosing 0 shares of Masimo Corporation.

Hsbc Holdings Plc has a history of taking positions in derivatives of the underlying security (MASI) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:MASI / Masimo Corporation Historical Put/Call Ratio
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)
2026-04-30 2026-03-31 13F MASIMO COM 574795100 473,434 473,434 84,267 0.0059
2025-05-14 2025-03-31 13F MASIMO COM 574795100 0 -100.00 0
2025-02-14 2024-12-31 13F MASIMO COM 574795100 5,494 5,494 912 0.0005
2024-11-14 2024-09-30 13F MASIMO COM 574795100 0 -27,609 -100.00 0 -100.00
2024-08-12 2024-06-30 13F MASIMO COM 574795100 27,609 21,887 382.51 3,510 317.86 0.0021
2024-05-15 2024-03-31 13F MASIMO COM 574795100 5,722 1,590 38.48 840 73.55 0.0006
2024-02-12 2023-12-31 13F MASIMO COM 574795100 4,132 -6,816 -62.26 484 -49.79 0.0004
2023-11-13 2023-09-30 13F MASIMO COM 574795100 10,948 -13,037 -54.35 964 -75.58 0.0010
2023-08-11 2023-06-30 13F MASIMO COM 574795100 23,985 -8,609 -26.41 3,947 -34.33 0.0040
2023-05-15 2023-03-31 13F MASIMO COM 574795100 32,594 423 1.31 6,011 26.31 0.0072
2023-02-14 2022-12-31 13F MASIMO COM 574795100 32,171 -231,567 -87.80 4,759 -87.47 0.0055
2022-11-14 2022-09-30 13F MASIMO COM 574795100 263,738 210,896 399.11 37,967 446.21 0.0619
2022-08-11 2022-06-30 13F MASIMO COM 574795100 52,842 4,144 8.51 6,951 -3.03 0.0097
2022-05-16 2022-03-31 13F MASIMO COM 574795100 48,698 13,671 39.03 7,168 -30.41 0.0087
2022-02-11 2021-12-31 13F MASIMO COM 574795100 35,027 6,748 23.86 10,300 34.38 0.0095
2021-11-12 2021-09-30 13F MASIMO COM 574795100 28,279 -13,498 -32.31 7,665 -24.61 0.0077
2021-08-13 2021-06-30 13F MASIMO COM 574795100 41,777 22,651 118.43 10,167 131.91 0.0108
2021-05-14 2021-03-31 13F MASIMO COM 574795100 19,126 3,197 20.07 4,384 2.77 0.0052
2021-02-25 2020-12-31 13F/A-1 MASIMO COM 574795100 15,929 -6,366 -28.55 4,266 -18.91 0.0057
2021-02-12 2020-12-31 13F MASIMO COM 574795100 13,618 -8,677 3,646 865.6944
2020-11-12 2020-09-30 13F MASIMO COM 574795100 22,295 9,024 68.00 5,261 73.86 0.0084
2020-08-14 2020-06-30 13F MASIMO COM 574795100 13,271 4,560 52.35 3,026 96.75 0.0057
2020-05-15 2020-03-31 13F MASIMO COM 574795100 8,711 -20,051 -69.71 1,538 -66.30 0.0036
2020-02-14 2019-12-31 13F MASIMO COM 574795100 28,762 -42,114 -59.42 4,564 -56.72 0.0079
2019-11-14 2019-09-30 13F MASIMO COM 574795100 70,876 15,125 27.13 10,546 27.11 0.0197
2019-08-13 2019-06-30 13F MASIMO COM 574795100 55,751 25,406 83.72 8,297 97.74 0.0158
2019-05-15 2019-03-31 13F MASIMO COM 574795100 30,345 -48,402 -61.47 4,196 -50.34 0.0077
2019-02-13 2018-12-31 13F MASIMO COM 574795100 78,747 21,994 38.75 8,450 19.55 0.0156
2018-11-13 2018-09-30 13F MASIMO COM 574795100 56,753 -21,976 -27.91 7,068 -8.02 0.0114
2018-08-10 2018-06-30 13F MASIMO COM 574795100 78,729 38,592 96.15 7,684 117.68 0.0137
2018-05-11 2018-03-31 13F MASIMO COM 574795100 40,137 36,925 1,149.60 3,530 1,193.04 0.0053
2018-02-14 2017-12-31 13F MASIMO COM 574795100 3,212 632 24.50 273 21.88 0.0004
2017-11-14 2017-09-30 13F MASIMO COM 574795100 2,580 -89,394 -97.19 224 -97.33 0.0004
2017-08-14 2017-06-30 13F MASIMO COM 574795100 91,974 -103 -0.11 8,387 -2.33 0.0154
2017-05-15 2017-03-31 13F MASIMO COM 574795100 92,077 83,308 950.03 8,587 1,352.96 0.0180
2017-02-09 2016-12-31 13F MASIMO COM 574795100 8,769 8,769 591 0.0014
2013-10-11 2012-09-30 13F/A-2 MASIMO COM 574795100 0 -10,000 -100.00 0 -100.00
2013-10-11 2012-06-30 13F/A-1 MASIMO COM 574795100 10,000 0 0.00 224 -4.27 0.0010
2013-10-11 2012-03-31 13F/A-1 MASIMO COM 574795100 10,000 10,000 234 0.0010
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2024-02-12 2023-12-31 13F MASIMO COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-11-13 2023-09-30 13F MASIMO COM Call 8,000 707 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2021-05-14 2021-03-31 13F MASIMO COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-02-12 2020-12-31 13F MASIMO COM Put 2,311 620 n/a n/a n/a
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.