Monolithic Power Systems, Inc.
MX ˙ BMV ˙ US6098391054
SecurityMX:MPWR / Monolithic Power Systems, Inc.
InstitutionMeeder Asset Management Inc
Latest Disclosed Ownership86 shares
Latest Disclosed Value $ 94,028
Meeder Asset Management Inc reports 99.41% decrease in ownership of MPWR / Monolithic Power Systems, Inc.

On May 7, 2026 - Meeder Asset Management Inc filed a 13F-HR form disclosing ownership of 86 shares of Monolithic Power Systems, Inc. (MX:MPWR) valued at $94,028 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 14,681 shares of Monolithic Power Systems, Inc.. This represents a change in shares of -99.41% 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)
2026-05-07 2026-03-31 13F MONOLITHIC PWR SYS COM 609839105 86 -14,595 -99.41 94 -99.29 0.0026
2026-02-11 2025-12-31 13F MONOLITHIC PWR SYS COM 609839105 14,681 98 0.67 13,306 -0.89 0.7171
2025-10-24 2025-09-30 13F MONOLITHIC PWR SYS COM 609839105 14,583 7 0.05 13,426 25.94 0.7654
2025-08-07 2025-06-30 13F MONOLITHIC PWR SYS COM 609839105 14,576 14,507 21,024.64 10,661 26,550.00 0.6547
2025-05-07 2025-03-31 13F MONOLITHIC PWR SYS COM 609839105 69 41 146.43 40 150.00 0.0027
2025-02-12 2024-12-31 13F MONOLITHIC PWR SYS COM 609839105 28 -10 -26.32 17 -54.29 0.0011
2024-11-07 2024-09-30 13F MONOLITHIC PWR SYS COM 609839105 38 8 26.67 35 45.83 0.0023
2024-08-08 2024-06-30 13F MONOLITHIC PWR SYS COM 609839105 30 -2,659 -98.88 25 -98.68 0.0017
2024-05-07 2024-03-31 13F MONOLITHIC PWR SYS COM 609839105 2,689 25 0.94 1,822 8.39 0.1150
2024-01-25 2023-12-31 13F MONOLITHIC POWER SYS COM 609839105 2,664 2,664 1,680 0.1309
2023-05-15 2023-03-31 13F MONOLITHIC PWR SYS COM 609839105 0 -1,287 -100.00 0 -100.00
2023-02-14 2022-12-31 13F MONOLITHIC PWR SYS COM 609839105 1,287 -7,981 -86.11 455 -86.49 0.0398
2022-11-14 2022-09-30 13F MONOLITHIC PWR SYS COM 609839105 9,268 8,445 1,026.12 3,368 962.46 0.1942
2022-08-08 2022-06-30 13F MONOLITHIC PWR SYS COM 609839105 823 481 140.64 317 90.96 0.0184
2022-05-10 2022-03-31 13F MONOLITHIC PWR SYS COM 609839105 342 176 106.02 166 104.94 0.0061
2022-02-11 2021-12-31 13F MONOLITHIC PWR SYS COMMON STOCKS 609839105 166 -921 -84.73 81 -84.66 0.0081
2021-11-08 2021-09-30 13F MONOLITHIC PWR SYS COM 609839105 1,087 946 670.92 528 896.23 0.0277
2021-08-09 2021-06-30 13F MONOLITHIC PWR SYS COM 609839105 141 -761 -84.37 53 -83.33 0.0025
2021-04-28 2021-03-31 13F MONOLITHIC PWR SYS COM 609839105 902 819 986.75 318 960.00 0.0163
2021-02-09 2020-12-31 13F MONOLITHIC PWR SYS COM 609839105 83 -1,465 -94.64 30 -93.07 0.0066
2020-11-02 2020-09-30 13F MONOLITHIC PWR SYS COM 609839105 1,548 1,490 2,568.97 433 2,992.86 0.0280
2020-08-11 2020-06-30 13F MONOLITHIC PWR SYS COM 609839105 58 -398 -87.28 14 -81.58 0.0009
2020-05-15 2020-03-31 13F Monolithic Power Systems Common Stock 609839105 456 153 50.50 76 40.74 0.0059
2020-02-13 2019-12-31 13F Monolithic Power Systems Common Stock 609839105 303 257 558.70 54 671.43 0.0033
2019-10-17 2019-09-30 13F Monolithic Power Systems Common Stock 609839105 46 0 0.00 7 16.67 0.0005
2019-08-05 2019-06-30 13F Monolithic Power Systems Common Stock 609839105 46 -82 -64.06 6 -64.71 0.0004
2019-04-16 2019-03-31 13F Monolithic Power Systems Common Stock 609839105 128 -182 -58.71 17 -52.78 0.0013
2019-01-17 2018-12-31 13F Monolithic Power Systems Common Stock 609839105 310 139 81.29 36 71.43 0.0032
2018-11-02 2018-09-30 13F Monolithic Power Systems Common Stock 609839105 171 171 21 0.0016
2017-07-13 2017-06-30 13F Monolithic Power Systems Common Stock 609839105 0 -84 -100.00 0 -100.00
2017-05-12 2017-03-31 13F Monolithic Power Systems Common Stock 609839105 84 84 8 0.0007
2016-10-19 2016-09-30 13F Monolithic Power Systems Common Stock 609839105 0 -3,511 -100.00 0 -100.00
2016-07-22 2016-06-30 13F Monolithic Power Systems Common Stock 609839105 3,511 0 0.00 240 7.62 0.0225
2016-05-12 2016-03-31 13F Monolithic Power Systems Common Stock 609839105 3,511 -968 -21.61 223 -22.03 0.0210
2016-01-15 2015-12-31 13F Monolithic Power Systems Common Stock 609839105 4,479 968 27.57 286 58.89 0.0258
2015-10-15 2015-09-30 13F Monolithic Power Systems Common Stock 609839105 3,511 3,511 180 0.0176
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.