Monolithic Power Systems, Inc.
MX ˙ BMV ˙ US6098391054
SecurityMX:MPWR / Monolithic Power Systems, Inc.
InstitutionSheets Smith Wealth Management
Latest Disclosed Ownership301 shares
Latest Disclosed Value $ 329,098
Sheets Smith Wealth Management ownership in MPWR / Monolithic Power Systems, Inc.

On April 16, 2026 - Sheets Smith Wealth Management filed a 13F-HR form disclosing ownership of 301 shares of Monolithic Power Systems, Inc. (MX:MPWR) valued at $329,098 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 20, 2026 disclosing 301 shares of Monolithic Power Systems, Inc.. This represents a change in shares of 0.00% 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)
2026-04-16 2026-03-31 13F MONOLITHIC PWR SYS COM 609839105 301 0 0.00 329 20.96 0.0370
2026-01-20 2025-12-31 13F MONOLITHIC PWR SYS COM 609839105 301 -720 -70.52 273 -71.03 0.0299
2025-10-16 2025-09-30 13F MONOLITHIC PWR SYS COM 609839105 1,021 621 155.25 940 221.58 0.1064
2025-07-15 2025-06-30 13F MONOLITHIC PWR SYS COM 609839105 400 0 0.00 293 26.41 0.0342
2025-04-23 2025-03-31 13F MONOLITHIC PWR SYS COM 609839105 400 0 0.00 232 -2.12 0.0288
2025-01-17 2024-12-31 13F MONOLITHIC PWR SYS COM 609839105 400 0 0.00 237 -36.04 0.0289
2024-11-01 2024-09-30 13F MONOLITHIC PWR SYS COM 609839105 400 0 0.00 370 12.50 0.0452
2024-07-30 2024-06-30 13F MONOLITHIC PWR SYS COM 609839105 400 0 0.00 329 21.48 0.0393
2024-05-08 2024-03-31 13F MONOLITHIC PWR SYS COM 609839105 400 0 0.00 271 7.14 0.0303
2024-02-06 2023-12-31 13F MONOLITHIC PWR SYS COM 609839105 400 400 252 0.0359
2023-10-23 2023-09-30 13F MONOLITHIC PWR SYS COM 609839105 0 -400 -100.00 0 -100.00
2023-08-09 2023-06-30 13F MONOLITHIC PWR SYS COM 609839105 400 0 0.00 216 8.00 0.0316
2023-05-26 2023-03-31 13F/A-1 MONOLITHIC PWR SYS COM 609839105 400 400 200 0.0306
2023-05-12 2023-03-31 13F MONOLITHIC PWR SYS COM 609839105 501 501 200 0.0307
2019-01-11 2018-12-31 13F MONOLITHIC PWR SYS COM 609839105 0 -8,657 -100.00 0 -100.00
2018-10-15 2018-09-30 13F MONOLITHIC PWR SYS COM 609839105 8,657 -2,969 -25.54 1,087 -30.05 0.2249
2018-07-26 2018-06-30 13F MONOLITHIC PWR SYS COM 609839105 11,626 316 2.79 1,554 18.72 0.3637
2018-04-09 2018-03-31 13F MONOLITHIC PWR SYS COM 609839105 11,310 -218 -1.89 1,309 1.08 0.3145
2018-01-12 2017-12-31 13F MONOLITHIC PWR SYS COM 609839105 11,528 131 1.15 1,295 6.67 0.3053
2017-10-12 2017-09-30 13F MONOLITHIC PWR SYS COM 609839105 11,397 -163 -1.41 1,214 8.98 0.3062
2017-07-19 2017-06-30 13F MONOLITHIC PWR SYS COM 609839105 11,560 -464 -3.86 1,114 0.63 0.2944
2017-04-10 2017-03-31 13F MONOLITHIC PWR SYS COM 609839105 12,024 9 0.07 1,107 12.50 0.2939
2017-02-03 2016-12-31 13F MONOLITHIC PWR SYS COM 609839105 12,015 -717 -5.63 984 -4.00 0.2762
2016-11-18 2016-09-30 13F MONOLITHIC PWR SYS COM 609839105 12,732 -600 -4.50 1,025 12.51 0.2890
2016-08-15 2016-06-30 13F MONOLITHIC POWER SYSTEMS COM 609839105 13,332 -319 -2.34 911 4.83 0.2647
2016-05-13 2016-03-31 13F MONOLITHIC POWER SYSTEMS COM 609839105 13,651 13,651 0.00 869 0.2672
2016-02-01 2015-12-31 13F MONOLITHIC POWER SYSTEMS COM 609839105 0 0 0 0.0000
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.