Monolithic Power Systems, Inc.
MX ˙ BMV ˙ US6098391054
SecurityMX:MPWR / Monolithic Power Systems, Inc.
InstitutionLPL Financial LLC
Latest Disclosed Ownership67,944 shares
Latest Disclosed Value $ 74,287,043
LPL Financial LLC reports 6.02% increase in ownership of MPWR / Monolithic Power Systems, Inc.

On May 6, 2026 - LPL Financial LLC filed a 13F-HR form disclosing ownership of 67,944 shares of Monolithic Power Systems, Inc. (MX:MPWR) valued at $74,287,043 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 64,085 shares of Monolithic Power Systems, Inc.. This represents a change in shares of 6.02% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-06 2026-03-31 13F MONOLITHIC PWR SYS COM 609839105 67,944 3,859 6.02 74,287 27.90 0.0197
2026-02-11 2025-12-31 13F MONOLITHIC PWR SYS COM 609839105 64,085 6,002 10.33 58,084 8.63 0.0159
2025-11-12 2025-09-30 13F MONOLITHIC PWR SYS COM 609839105 58,083 -1,172 -1.98 53,473 23.39 0.0156
2025-08-12 2025-06-30 13F MONOLITHIC PWR SYS COM 609839105 59,255 -52,867 -47.15 43,338 -33.36 0.0145
2025-05-07 2025-03-31 13F MONOLITHIC PWR SYS COM 609839105 112,122 3,379 3.11 65,028 1.06 0.0253
2025-02-11 2024-12-31 13F MONOLITHIC PWR SYS COM 609839105 108,743 10,233 10.39 64,343 -29.35 0.0262
2024-11-08 2024-09-30 13F MONOLITHIC PWR SYS COM 609839105 98,510 8,238 9.13 91,073 22.78 0.0406
2024-08-07 2024-06-30 13F MONOLITHIC PWR SYS COM 609839105 90,272 4,049 4.70 74,175 26.99 0.0369
2024-05-10 2024-03-31 13F MONOLITHIC PWR SYS COM 609839105 86,223 4,885 6.01 58,409 13.84 0.0314
2024-02-14 2023-12-31 13F MONOLITHIC PWR SYS COM 609839105 81,338 28,007 52.52 51,307 108.24 0.0311
2023-11-13 2023-09-30 13F MONOLITHIC PWR SYS COM 609839105 53,331 -4,961 -8.51 24,639 -21.76 0.0172
2023-07-31 2023-06-30 13F MONOLITHIC PWR SYS COM 609839105 58,292 -8,452 -12.66 31,491 -5.74 0.0225
2023-05-10 2023-03-31 13F MONOLITHIC PWR SYS COM 609839105 66,744 -1,271 -1.87 33,408 38.91 0.0260
2023-02-07 2022-12-31 13F MONOLITHIC PWR SYS COM 609839105 68,015 13,747 25.33 24,051 21.95 0.0206
2022-11-14 2022-09-30 13F MONOLITHIC PWR SYS COM 609839105 54,268 14,962 38.07 19,721 30.65 0.0190
2022-08-12 2022-06-30 13F MONOLITHIC PWR SYS COM 609839105 39,306 1,006 2.63 15,095 -18.85 0.0143
2022-05-16 2022-03-31 13F MONOLITHIC PWR SYS COM 609839105 38,300 3,230 9.21 18,601 7.51 0.0160
2022-02-14 2021-12-31 13F MONOLITHIC PWR SYS COM 609839105 35,070 3,598 11.43 17,301 13.42 0.0145
2021-11-15 2021-09-30 13F MONOLITHIC PWR SYS COM 609839105 31,472 3,322 11.80 15,254 45.10 0.0143
2021-08-13 2021-06-30 13F MONOLITHIC PWR SYS COM 609839105 28,150 6,653 30.95 10,513 38.46 0.0106
2021-05-14 2021-03-31 13F MONOLITHIC PWR SYS COM 609839105 21,497 1,952 9.99 7,593 6.08 0.0087
2021-02-12 2020-12-31 13F MONOLITHIC PWR SYS COM 609839105 19,545 354 1.84 7,158 33.40 0.0093
2020-11-09 2020-09-30 13F MONOLITHIC PWR SYS COM 609839105 19,191 3,506 22.35 5,366 44.36 0.0084
2020-08-13 2020-06-30 13F MONOLITHIC PWR SYS COM 609839105 15,685 2,853 22.23 3,717 72.96 0.0065
2020-05-14 2020-03-31 13F MONOLITHIC PWR SYS COM 609839105 12,832 -962 -6.97 2,149 -12.46 0.0046
2020-02-14 2019-12-31 13F MONOLITHIC PWR SYS COM 609839105 13,794 1,061 8.33 2,455 23.86 0.0045
2019-11-13 2019-09-30 13F MONOLITHIC PWR SYS COM 609839105 12,733 -499 -3.77 1,982 10.29 0.0040
2019-08-09 2019-06-30 13F MONOLITHIC PWR SYS COM 609839105 13,232 68 0.52 1,797 0.73 0.0038
2019-05-08 2019-03-31 13F MONOLITHIC PWR SYS COM 609839105 13,164 -1,337 -9.22 1,784 5.81 0.0041
2019-02-07 2018-12-31 13F MONOLITHIC PWR SYS COM 609839105 14,501 -386 -2.59 1,686 -9.79 0.0045
2018-11-14 2018-09-30 13F MONOLITHIC PWR SYS COM 609839105 14,887 2,278 18.07 1,869 10.92 0.0045
2018-08-14 2018-06-30 13F MONOLITHIC PWR SYS COM 609839105 12,609 -1,303 -9.37 1,685 4.59 0.0044
2018-05-15 2018-03-31 13F MONOLITHIC PWR SYS COM 609839105 13,912 -8,290 -37.34 1,611 -35.43 0.0044
2018-02-14 2017-12-31 13F MONOLITHIC PWR SYS COM 609839105 22,202 5,771 35.12 2,495 42.49 0.0076
2017-11-14 2017-09-30 13F MONOLITHIC PWR SYS COM 609839105 16,431 2,417 17.25 1,751 29.61 0.0062
2017-08-14 2017-06-30 13F MONOLITHIC PWR SYS COM 609839105 14,014 5,735 69.27 1,351 78.00 0.0051
2017-05-15 2017-03-31 13F MONOLITHIC POWER COM 609839105 8,279 3,224 63.78 759 81.15 0.0052
2017-02-13 2016-12-31 13F MONOLITHIC POWER COM 609839105 5,055 5,055 0.00 419 0.0032
2015-05-14 2015-03-31 13F MONOLITHIC POWER COM 609839105 0 -40,328 -100.00 0 -100.00
2015-02-13 2014-12-31 13F MONOLITHIC POWER COM 609839105 40,328 40,328 2,006 0.0110
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.