Monolithic Power Systems, Inc.
US ˙ NasdaqGS ˙ US6098391054

SecurityMPWR / Monolithic Power Systems, Inc.
InstitutionValeo Financial Advisors, LLC
Latest Disclosed Ownership528 shares
Latest Disclosed Value $ 577,704
Valeo Financial Advisors, LLC reports 23.59% decrease in ownership of MPWR / Monolithic Power Systems, Inc.

On May 8, 2026 - Valeo Financial Advisors, LLC filed a 13F-HR form disclosing ownership of 528 shares of Monolithic Power Systems, Inc. (US:MPWR) valued at $577,289 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 691 shares of Monolithic Power Systems, Inc.. This represents a change in shares of -23.59% during the quarter. The current value of the position is $781,994 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)
2026-05-08 2026-03-31 13F MONOLITHIC PWR SYS INC COM Stock 609839105 528 -163 -23.59 578 -7.83 0.0138
2026-02-04 2025-12-31 13F MONOLITHIC PWR SYS INC COM Stock 609839105 691 20 2.98 627 1.29 0.0139
2025-11-03 2025-09-30 13F MONOLITHIC PWR SYS INC COM Stock 609839105 671 -68 -9.20 618 14.44 0.0141
2025-09-12 2025-06-30 13F/A-1 MONOLITHIC PWR SYS INC COM Stock 609839105 739 -54 -6.81 541 17.65 0.0133
2025-07-22 2025-06-30 13F MONOLITHIC PWR SYS INC COM Stock 609839105 579 -214 423 0.0102
2025-04-30 2025-03-31 13F MONOLITHIC PWR SYS INC COM Stock 609839105 793 254 47.12 460 44.34 0.0128
2025-01-30 2024-12-31 13F MONOLITHIC PWR SYS INC COM Stock 609839105 539 -86 -13.76 319 -44.89 0.0089
2024-10-10 2024-09-30 13F MONOLITHIC PWR SYS INC COM Stock 609839105 625 67 12.01 578 25.98 0.0165
2024-07-10 2024-06-30 13F MONOLITHIC PWR SYS INC COM Stock 609839105 558 15 2.76 458 31.61 0.0143
2024-04-25 2024-03-31 13F/A-1 MONOLITHIC PWR SYS INC COM Stock 609839105 543 -70 -11.42 349 -9.84 0.0125
2024-04-19 2024-03-31 13F MONOLITHIC PWR SYS INC COM Stock 609839105 542 -71 367 0.0126
2024-01-29 2023-12-31 13F MONOLITHIC PWR SYS INC COM Stock 609839105 613 26 4.43 387 42.44 0.0156
2023-10-20 2023-09-30 13F MONOLITHIC PWR SYS INC COM Stock 609839105 587 42 7.71 271 -7.82 0.0124
2023-07-14 2023-06-30 13F MONOLITHIC PWR SYS INC COM Stock 609839105 545 140 34.57 294 45.54 0.0135
2023-04-17 2023-03-31 13F MONOLITHIC PWR SYS INC COM Stock 609839105 405 405 203 0.0098
2021-07-22 2021-06-30 13F MONOLITHIC PWR SYS INC COM Stock 609839105 0 -175 -100.00 0 -100.00
2021-04-12 2021-03-31 13F MONOLITHIC PWR SYS INC COM Stock 609839105 175 175 62 0.0029
2020-10-28 2020-09-30 13F MONOLITHIC PWR SYS INC COM Stock 609839105 0 -367 -100.00 0 -100.00
2020-07-20 2020-06-30 13F MONOLITHIC PWR SYS INC COM Stock 609839105 367 0 0.00 87 38.10 0.0079
2020-04-13 2020-03-31 13F MONOLITHIC PWR SYS INC COM Stock 609839105 367 -32 -8.02 63 -11.27 0.0067
2020-01-24 2019-12-31 13F MONOLITHIC PWR SYS INC COM Stock 609839105 399 -10 -2.44 71 10.94 0.0069
2019-10-15 2019-09-30 13F MONOLITHIC PWR SYS INC COM Stock 609839105 409 -70 -14.61 64 -1.54 0.0071
2019-07-10 2019-06-30 13F MONOLITHIC PWR SYS INC COM Stock 609839105 479 -94 -16.40 65 -16.67 0.0074
2019-04-12 2019-03-31 13F MONOLITHIC PWR SYS INC COM Stock 609839105 573 57 11.05 78 30.00 0.0095
2019-01-30 2018-12-31 13F MONOLITHIC PWR SYS INC COM Stock 609839105 516 437 553.16 60 566.67 0.0084
2018-11-01 2018-09-30 13F MONOLITHIC PWR SYS INC COM Stock 609839105 79 36 83.72 9 50.00 0.0012
2018-08-14 2018-06-30 13F MONOLITHIC PWR SYS INC COM Stock 609839105 43 0 0.00 6 20.00 0.0008
2018-04-12 2018-03-31 13F MONOLITHIC PWR SYS INC COM Stock 609839105 43 0 0.00 5 0.00 0.0008
2018-02-09 2017-12-31 13F MONOLITHIC PWR SYS INC COM Stock 609839105 43 28 186.67 5 150.00 0.0008
2017-11-15 2017-09-30 13F/A-1 MONOLITHIC PWR SYS INC COM Stock 609839105 15 15 2 0.0005
2017-11-14 2017-09-30 13F MONOLITHIC PWR SYS INC COM Stock 609839105 15 2
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.