Masimo Corporation
US ˙ NasdaqGS ˙ US5747951003

SecurityMASI / Masimo Corporation
InstitutionNeuberger Berman Group LLC
Latest Disclosed Ownership403,309 shares
Latest Disclosed Value $ 71,736,572
Neuberger Berman Group LLC reports 7,956.51% increase in ownership of MASI / Masimo Corporation

On May 14, 2026 - Neuberger Berman Group LLC filed a 13F-HR form disclosing ownership of 403,309 shares of Masimo Corporation (US:MASI) valued at $71,736,572 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 5,006 shares of Masimo Corporation. This represents a change in shares of 7,956.51% during the quarter. The current value of the position is $72,119,715 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)
2026-05-14 2026-03-31 13F MASIMO Common 574795100 403,309 398,303 7,956.51 71,737 10,919.35 0.0279
2026-02-13 2025-12-31 13F MASIMO Common 574795100 5,006 106 2.16 651 -9.83 0.0005
2025-11-12 2025-09-30 13F MASIMO Common 574795100 4,900 -169 -3.33 723 -15.26 0.0005
2025-08-25 2025-06-30 13F/A-1 MASIMO Common 574795100 5,069 -69,893 -93.24 853 -93.18 0.0007
2025-08-13 2025-06-30 13F MASIMO Common 574795100 5,069 -69,893 853 0.0003
2025-05-13 2025-03-31 13F MASIMO Common 574795100 74,962 -63,160 -45.73 12,489 -45.30 0.0105
2025-02-13 2024-12-31 13F MASIMO Common 574795100 138,122 133,825 3,114.38 22,832 3,891.43 0.0181
2024-11-14 2024-09-30 13F MASIMO Common 574795100 4,297 -118 -2.67 573 2.88 0.0004
2024-11-14 2024-06-30 13F/A-1 MASIMO Common 574795100 4,415 88 2.03 556 -12.44 0.0005
2024-08-13 2024-06-30 13F MASIMO Common 574795100 4,415 88 556 0.0005
2024-11-14 2024-03-31 13F/A-1 MASIMO Common 574795100 4,327 19 0.44 635 25.99 0.0005
2024-05-13 2024-03-31 13F MASIMO Common 574795100 4,327 19 635 0.0005
2024-11-14 2023-12-31 13F/A-2 MASIMO Common 574795100 4,308 4,308 505 0.0004
2024-02-09 2023-12-31 13F MASIMO Common 574795100 4,308 4,308 505 0.0004
2023-11-14 2023-09-30 13F MASIMO Common 574795100 0 -80,285 -100.00 0 -100.00
2023-08-11 2023-06-30 13F MASIMO Common 574795100 80,285 -45,347 -36.10 13,217 -43.00 0.0118
2023-05-12 2023-03-31 13F MASIMO Common 574795100 125,632 1,693 1.37 23,184 26.54 0.0215
2023-02-13 2022-12-31 13F MASIMO Common 574795100 123,939 -378,251 -75.32 18,322 -74.34 0.0180
2022-11-15 2022-09-30 13F MASIMO Common 574795100 502,190 -30,639 -5.75 71,411 -0.82 0.0746
2022-08-15 2022-06-30 13F MASIMO Common 574795100 532,829 -126,929 -19.24 71,999 -25.02 0.0724
2022-05-23 2022-03-31 13F/A-1 MASIMO Common 574795100 659,758 143,167 27.71 96,021 -36.30 0.0814
2022-05-13 2022-03-31 13F MASIMO Common 574795100 328,376 -188,215 47,751 0.0213
2022-02-11 2021-12-31 13F MASIMO Common 574795100 516,591 -11,114 -2.11 150,729 5.81 0.1183
2021-11-12 2021-09-30 13F MASIMO Common 574795100 527,705 -177,195 -25.14 142,449 -16.53 0.1245
2021-08-13 2021-06-30 13F MASIMO Common 574795100 704,900 -90,601 -11.39 170,651 -6.45 0.1489
2021-05-13 2021-03-31 13F MASIMO Common 574795100 795,501 130,230 19.58 182,418 2.29 0.1742
2021-02-10 2020-12-31 13F MASIMO Common 574795100 665,271 -53,143 -7.40 178,327 5.25 0.1849
2020-11-12 2020-09-30 13F MASIMO Common 574795100 718,414 90,936 14.49 169,426 18.46 0.2009
2020-08-13 2020-06-30 13F MASIMO Common 574795100 627,478 387,423 161.39 143,029 236.39 0.1778
2020-05-14 2020-03-31 13F MASIMO Common 574795100 240,055 -7,499 -3.03 42,519 8.67 0.0648
2020-02-12 2019-12-31 13F MASIMO Common 574795100 247,554 53,564 27.61 39,128 35.56 0.0457
2019-11-13 2019-09-30 13F MASIMO Common 574795100 193,990 3,424 1.80 28,864 1.78 0.0353
2019-08-13 2019-06-30 13F MASIMO Common 574795100 190,566 304 0.16 28,360 7.79 0.0339
2019-05-13 2019-03-31 13F MASIMO Common 574795100 190,262 72,872 62.08 26,310 108.74 0.0322
2019-02-12 2018-12-31 13F MASIMO Common 574795100 117,390 2,076 1.80 12,604 -12.23 0.0176
2018-11-16 2018-09-30 13F/A-1 MASIMO Common 574795100 115,314 113,006 4,896.27 14,361 6,282.67 0.0163
2018-11-13 2018-09-30 13F MASIMO Common 574795100 115,314 113,006 14,361
2018-08-13 2018-06-30 13F MASIMO Common 574795100 2,308 0 0.00 225 10.84 0.0002
2018-05-08 2018-03-31 13F MASIMO Common 574795100 2,308 2,308 203 0.0002
2018-02-14 2017-12-31 13F MASIMO COMMON STOCK 574795100 0 -11,403 -100.00 0 -100.00
2017-11-15 2017-09-30 13F MASIMO COMMON STOCK 574795100 11,403 196 1.75 987 -3.42 0.0012
2017-08-08 2017-06-30 13F MASIMO COMMON STOCK 574795100 11,207 8,999 407.56 1,022 396.12 0.0013
2017-05-10 2017-03-31 13F MASIMO COMMON STOCK 574795100 2,208 2,208 -99.56 206 -98.24 0.0003
2014-02-11 2013-12-31 13F MASIMO COMMON STOCK 574795100 0 -501,300 -100.00 0 -100.00
2013-10-29 2013-09-30 13F MASIMO COMMON STOCK 574795100 501,300 501,300 11,720 0.0152
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.