Masimo Corporation
MX ˙ BMV ˙ US5747951003
SecurityMX:MASI / Masimo Corporation
InstitutionGotham Asset Management, LLC
ManagerJoel Greenblatt
Latest Disclosed Ownership341,468 shares
Latest Disclosed Value $ 60,736,913
Gotham Asset Management, LLC reports 0.21% decrease in ownership of MASI / Masimo Corporation

On May 15, 2026 - Gotham Asset Management, LLC filed a 13F-HR form disclosing ownership of 341,468 shares of Masimo Corporation (MX:MASI) valued at $60,736,913 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 342,194 shares of Masimo Corporation. This represents a change in shares of -0.21% 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)
2026-05-15 2026-03-31 13F MASIMO COM 574795100 341,468 -726 -0.21 60,737 36.47 0.1860
2026-02-17 2025-12-31 13F MASIMO COM 574795100 342,194 213,168 165.21 44,506 133.78 0.1625
2025-11-14 2025-09-30 13F MASIMO COM 574795100 129,026 -36,330 -21.97 19,038 -31.56 0.0829
2025-08-14 2025-06-30 13F MASIMO COM 574795100 165,356 20,766 14.36 27,816 15.48 0.1664
2025-05-15 2025-03-31 13F MASIMO COM 574795100 144,590 16,810 13.16 24,089 14.04 0.2010
2025-02-14 2024-12-31 13F MASIMO COM 574795100 127,780 -25,706 -16.75 21,122 3.22 0.2003
2024-11-14 2024-09-30 13F MASIMO COM 574795100 153,486 72,727 90.05 20,464 101.22 0.2117
2024-08-14 2024-06-30 13F MASIMO COM 574795100 80,759 3,661 4.75 10,171 -10.17 0.1317
2024-05-15 2024-03-31 13F MASIMO COM 574795100 77,098 -2,958 -3.69 11,322 20.65 0.1710
2024-02-14 2023-12-31 13F MASIMO COM 574795100 80,056 74,803 1,424.01 9,383 1,939.78 0.1741
2023-11-14 2023-09-30 13F MASIMO COM 574795100 5,253 -1,709 -24.55 461 -59.83 0.0095
2023-08-14 2023-06-30 13F MASIMO COM 574795100 6,962 1,180 20.41 1,146 7.31 0.0249
2023-05-15 2023-03-31 13F MASIMO COM 574795100 5,782 881 17.98 1,067 47.17 0.0259
2023-02-14 2022-12-31 13F MASIMO COM 574795100 4,901 586 13.58 725 19.05 0.0204
2022-11-14 2022-09-30 13F MASIMO COM 574795100 4,315 -2,193 -33.70 609 -28.35 0.0182
2022-08-15 2022-06-30 13F MASIMO COM 574795100 6,508 -6,812 -51.14 850 -56.16 0.0273
2022-05-16 2022-03-31 13F MASIMO COM 574795100 13,320 11,329 569.01 1,939 232.59 0.0600
2022-02-14 2021-12-31 13F MASIMO COM 574795100 1,991 700 54.22 583 67.05 0.0188
2021-11-15 2021-09-30 13F MASIMO COM 574795100 1,291 -534 -29.26 349 -21.04 0.0142
2021-08-16 2021-06-30 13F MASIMO COM 574795100 1,825 12 0.66 442 6.25 0.0187
2021-05-17 2021-03-31 13F MASIMO COM 574795100 1,813 -5 -0.28 416 -14.75 0.0186
2021-02-16 2020-12-31 13F MASIMO COM 574795100 1,818 -9 -0.49 488 13.23 0.0161
2020-11-16 2020-09-30 13F MASIMO COM 574795100 1,827 -60 -3.18 431 0.23 0.0138
2020-08-13 2020-06-30 13F MASIMO COM 574795100 1,887 42 2.28 430 31.50 0.0129
2020-05-15 2020-03-31 13F MASIMO COM 574795100 1,845 -10 -0.54 327 11.60 0.0091
2020-02-14 2019-12-31 13F MASIMO COM 574795100 1,855 -6,621 -78.11 293 -76.76 0.0054
2019-11-14 2019-09-30 13F MASIMO COM 574795100 8,476 -399 -4.50 1,261 -4.54 0.0223
2019-08-14 2019-06-30 13F MASIMO COM 574795100 8,875 -9,129 -50.71 1,321 -46.95 0.0211
2019-05-15 2019-03-31 13F MASIMO COM 574795100 18,004 -28,212 -61.04 2,490 -49.82 0.0365
2019-02-14 2018-12-31 13F MASIMO COM 574795100 46,216 35,977 351.37 4,962 289.18 0.0771
2018-11-14 2018-09-30 13F MASIMO COM 574795100 10,239 -34,532 -77.13 1,275 -70.84 0.0176
2018-08-14 2018-06-30 13F MASIMO COM 574795100 44,771 11,487 34.51 4,372 49.37 0.0632
2018-05-15 2018-03-31 13F MASIMO COM 574795100 33,284 33,284 2,927 0.0409
2018-02-14 2017-12-31 13F MASIMO COM 574795100 0 -62,657 -100.00 0 -100.00
2017-11-14 2017-09-30 13F MASIMO COM 574795100 62,657 50,913 433.52 5,424 406.44 0.0796
2017-08-14 2017-06-30 13F MASIMO COM 574795100 11,744 -37 -0.31 1,071 -2.55 0.0150
2017-05-15 2017-03-31 13F MASIMO COM 574795100 11,781 -27,652 -70.12 1,099 -58.65 0.0140
2017-02-14 2016-12-31 13F MASIMO COM 574795100 39,433 11,465 40.99 2,658 59.74 0.0342
2016-11-14 2016-09-30 13F MASIMO COM 574795100 27,968 13,951 99.53 1,664 126.09 0.0217
2016-08-15 2016-06-30 13F MASIMO COM 574795100 14,017 213 1.54 736 27.34 0.0088
2016-05-16 2016-03-31 13F MASIMO COM 574795100 13,804 13,804 0.00 578 0.0065
2015-08-14 2015-06-30 13F MASIMO COM 574795100 0 -42,408 -100.00 0 -100.00
2015-05-15 2015-03-31 13F MASIMO COM 574795100 42,408 42,408 0.00 1,399 0.0107
2015-02-17 2014-12-31 13F MASIMO COM 574795100 0 -55,059 -100.00 0 -100.00
2014-11-14 2014-09-30 13F MASIMO COM 574795100 55,059 -18,897 -25.55 1,172 -32.84 0.0117
2014-08-14 2014-06-30 13F MASIMO COM 574795100 73,956 35,280 91.22 1,745 65.25 0.0218
2014-05-15 2014-03-31 13F MASIMO COM 574795100 38,676 -48,212 -55.49 1,056 -58.43 0.0159
2014-02-14 2013-12-31 13F MASIMO COM 574795100 86,888 -7,657 -8.10 2,540 0.83 0.0605
2013-11-14 2013-09-30 13F MASIMO COM 574795100 94,545 -42,293 -30.91 2,519 -13.17 0.0818
2013-08-15 2013-06-30 13F/A-1 MASIMO COM 574795100 136,838 136,838 2,901 0.1244
2013-08-14 2013-06-30 13F MASIMO COM 574795100 136,838 2,901 0.1237
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.