Monolithic Power Systems, Inc.
MX ˙ BMV ˙ US6098391054
SecurityMX:MPWR / Monolithic Power Systems, Inc.
InstitutionCIBC Private Wealth Group, LLC
Latest Disclosed Ownership58,914 shares
Latest Disclosed Value $ 53,397,595
CIBC Private Wealth Group, LLC reports 5.53% decrease in ownership of MPWR / Monolithic Power Systems, Inc.

On February 12, 2026 - CIBC Private Wealth Group, LLC filed a 13F-HR form disclosing ownership of 58,914 shares of Monolithic Power Systems, Inc. (MX:MPWR) valued at $53,397,595 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 24, 2025 disclosing 62,363 shares of Monolithic Power Systems, Inc.. This represents a change in shares of -5.53% 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)
2026-02-12 2025-12-31 13F MONOLITHIC PWR SYS COM 609839105 58,914 -3,449 -5.53 53,398 -7.00 0.0903
2025-11-24 2025-09-30 13F MONOLITHIC PWR SYS COM 609839105 62,363 -1,277 -2.01 57,414 23.35 0.0983
2025-08-12 2025-06-30 13F MONOLITHIC PWR SYS COM 609839105 63,640 -3,214 -4.81 46,545 52.95 0.0831
2025-05-14 2025-03-31 13F MONOLITHIC PWR SYS COM 609839105 66,854 -104,291 -60.94 30,431 -71.37 0.0643
2025-02-12 2024-12-31 13F Monolithic Power Systems COM 609839105 171,145 -123,470 -41.91 106,274 -60.98 0.1927
2024-11-13 2024-09-30 13F Monolithic Power Systems COM 609839105 294,615 51,002 20.94 272,372 31.25 0.4881
2024-08-09 2024-06-30 13F Monolithic Power Systems COM 609839105 243,613 97,129 66.31 207,514 111.92 0.3892
2024-05-10 2024-03-31 13F Monolithic Power Systems COM 609839105 146,484 30,297 26.08 97,921 33.61 0.1918
2024-02-13 2023-12-31 13F MONOLITHIC PWR SYS INC COM COM 609839105 116,187 -31,035 -21.08 73,288 7.75 0.1552
2023-11-13 2023-09-30 13F MONOLITHIC PWR SYS INC COM COM 609839105 147,222 -8,459 -5.43 68,017 -19.13 0.1610
2023-11-21 2023-06-30 13F/A-1 MONOLITHIC PWR SYS INC COM COM 609839105 155,681 12,274 8.56 84,104 17.17 0.1839
2023-08-10 2023-06-30 13F MONOLITHIC PWR SYS INC COM COM 609839105 155,663 12,256 84,094 0.1839
2023-11-21 2023-03-31 13F/A-1 MONOLITHIC POWER SYSTEMS COM 609839105 143,407 36,573 34.23 71,781 193,900.00 0.1589
2023-05-12 2023-03-31 13F MONOLITHIC POWER SYSTEMS COM 609839105 143,407 36,573 71,781 0.1560
2023-06-01 2022-12-31 13F/A-2 Monolithic Power Systems COM 609839105 106,834 53,709 101.10 38 -99.81 0.0001
2023-02-14 2022-12-31 13F/A-1 MONOLITHIC PWR SYS INC COM COM 609839105 106,619 53,494 37,702 0.0789
2023-02-13 2022-12-31 13F MONOLITHIC PWR SYS INC COM COM 609839105 106,619 53,494 37,702 0.0000
2022-11-15 2022-09-30 13F MONOLITHIC PWR SYS INC COM COM 609839105 53,125 48,073 951.56 19,305 895.10 0.0520
2022-08-03 2022-06-30 13F MONOLITHIC PWR SYS COM 609839105 5,052 -632 -11.12 1,940 -29.74 0.0050
2022-05-16 2022-03-31 13F MONOLITHIC PWR SYS COM 609839105 5,684 -117,491 -95.39 2,761 -95.46 0.0060
2022-04-04 2021-12-31 13F/A-1 MONOLITHIC PWR SYS COM 609839105 123,175 -1,222 -0.98 60,766 0.79 0.1260
2022-02-08 2021-12-31 13F MONOLITHIC PWR SYS COM 609839105 123,175 -1,222 60,766 0.0985
2021-11-12 2021-09-30 13F MONOLITHIC PWR SYS COM 609839105 124,397 -1,126 -0.90 60,292 28.62 0.1403
2021-08-16 2021-06-30 13F MONOLITHIC PWR SYS COM 609839105 125,523 -153,565 -55.02 46,876 -52.45 0.1077
2021-05-12 2021-03-31 13F MONOLITHIC PWR SYS COM 609839105 279,088 -86,469 -23.65 98,577 -26.37 0.2482
2021-02-12 2020-12-31 13F MONOLITHIC PWR SYS COM 609839105 365,557 16,424 4.70 133,878 37.14 0.3539
2020-11-03 2020-09-30 13F/A-1 MONOLITHIC PWR SYS COM 609839105 349,133 349,133 97,621 0.2990
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.