Monolithic Power Systems, Inc.
US ˙ NasdaqGS ˙ US6098391054

SecurityMPWR / Monolithic Power Systems, Inc.
InstitutionPrudential Financial Inc
Latest Disclosed Ownership22,814 shares
Latest Disclosed Value $ 24,943,687
Prudential Financial Inc reports 2.82% decrease in ownership of MPWR / Monolithic Power Systems, Inc.

On May 13, 2026 - Prudential Financial Inc filed a 13F-HR form disclosing ownership of 22,814 shares of Monolithic Power Systems, Inc. (US:MPWR) valued at $24,943,687 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 23,476 shares of Monolithic Power Systems, Inc.. This represents a change in shares of -2.82% during the quarter. The current value of the position is $38,553,150 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)
2026-05-13 2026-03-31 13F MONOLITHIC PWR SYS COM 609839105 22,814 -662 -2.82 24,944 17.23 0.0173
2026-02-13 2025-12-31 13F MONOLITHIC PWR SYS COM 609839105 23,476 -2,697 -10.30 21,278 -11.70 0.0257
2025-11-13 2025-09-30 13F MONOLITHIC PWR SYS COM 609839105 26,173 -1,719 -6.16 24,096 18.12 0.0286
2025-08-12 2025-06-30 13F MONOLITHIC PWR SYS COM 609839105 27,892 2,776 11.05 20,400 40.05 0.0264
2025-05-13 2025-03-31 13F MONOLITHIC PWR SYS COM 609839105 25,116 -124 -0.49 14,567 -2.46 0.0208
2025-02-11 2024-12-31 13F MONOLITHIC PWR SYS COM 609839105 25,240 -49,197 -66.09 14,935 -78.30 0.0205
2024-11-14 2024-09-30 13F MONOLITHIC PWR SYS COM 609839105 74,437 565 0.76 68,817 13.37 0.0970
2024-08-13 2024-06-30 13F MONOLITHIC PWR SYS COM 609839105 73,872 40,862 123.79 60,699 171.45 0.0911
2024-05-14 2024-03-31 13F MONOLITHIC PWR SYS COM 609839105 33,010 -1,143 -3.35 22,362 7.31 0.0315
2024-02-13 2023-12-31 13F MONOLITHIC PWR SYS COM 609839105 34,153 -6,702 -16.40 20,838 10.40 0.0315
2023-11-13 2023-09-30 13F MONOLITHIC PWR SYS COM 609839105 40,855 1,395 3.54 18,875 -11.46 0.0296
2023-08-11 2023-06-30 13F MONOLITHIC PWR SYS COM 609839105 39,460 -454 -1.14 21,318 29.24 0.0310
2023-05-12 2023-03-31 13F MONOLITHIC PWR SYS COM 609839105 39,914 273 0.69 16,495 17.67 0.0258
2023-02-14 2022-12-31 13F MONOLITHIC PWR SYS COM 609839105 39,641 -4,256 -9.70 14,017 -12.45 0.0236
2022-11-04 2022-09-30 13F MONOLITHIC PWR SYS COM 609839105 43,897 5,544 14.46 16,011 7.22 0.0271
2022-08-15 2022-06-30 13F MONOLITHIC PWR SYS COM 609839105 38,353 -1,893 -4.70 14,933 -23.60 0.0237
2022-05-13 2022-03-31 13F MONOLITHIC PWR SYS COM 609839105 40,246 -26,039 -39.28 19,547 -43.96 0.0260
2022-02-14 2021-12-31 13F MONOLITHIC PWR SYS COM 609839105 66,285 -2,585 -3.75 34,881 2.36 0.0433
2021-11-15 2021-09-30 13F MONOLITHIC PWR SYS COM 609839105 68,870 31,321 83.41 34,076 143.00 0.0476
2021-08-16 2021-06-30 13F MONOLITHIC PWR SYS COM 609839105 37,549 -27,592 -42.36 14,023 -39.05 0.0193
2021-05-12 2021-03-31 13F MONOLITHIC PWR SYS COM 609839105 65,141 -5,648 -7.98 23,008 -11.26 0.0345
2021-08-16 2020-12-31 13F/A-1 MONOLITHIC PWR SYS COM 0366 609839105 70,789 70,384 17,378.77 25,927 22,844.25 0.0436
2021-02-16 2020-12-31 13F MONOLITHIC PWR SYS COM 609839105 70,789 70,384 25,925 0.0436
2021-08-05 2020-09-30 13F/A-1 MONOLITHIC PWR SYS COM 609839105 405 19 4.92 113 24.18 0.0163
2020-11-16 2020-09-30 13F MONOLITHIC PWR SYS COM 609839105 89,949 89,563 25,151 0.0474
2021-08-05 2020-06-30 13F/A-1 MONOLITHIC PWR SYS COM 0237 609839105 386 -78 -16.81 91 16.67 0.0168
2020-08-12 2020-06-30 13F MONOLITHIC PWR SYS COM 609839105 78,518 78,054 18,608 0.0358
2021-08-05 2020-03-31 13F/A-1 MONOLITHIC PWR SYS COM 0167 609839105 464 -50 -9.73 78 -15.22 0.0203
2020-05-12 2020-03-31 13F MONOLITHIC PWR SYS COM 609839105 94,637 94,123 15,847 0.0351
2021-08-05 2019-12-31 13F/A-1 MONOLITHIC PWR SYS COM 0178 609839105 514 73 16.55 92 33.33 0.0240
2020-02-11 2019-12-31 13F MONOLITHIC PWR SYS COM 609839105 102,540 102,099 18,254 0.0270
2021-08-05 2019-09-30 13F/A-1 MONOLITHIC PWR SYS COM 0155 609839105 441 52 13.37 69 30.19 0.0225
2019-11-13 2019-09-30 13F MONOLITHIC PWR SYS COM 609839105 56,855 56,466 8,848 0.0140
2021-08-05 2019-06-30 13F/A-1 MONOLITHIC PWR SYS COM 609839105 389 36 10.20 53 10.42 0.0184
2019-08-08 2019-06-30 13F MONOLITHIC PWR SYS COM 609839105 26,585 26,232 3,609 0.0056
2021-08-05 2019-03-31 13F/A-1 MONOLITHIC PWR SYS COM 609839105 353 72 25.62 48 45.45 0.0204
2019-05-15 2019-03-31 13F MONOLITHIC PWR SYS COM 609839105 24,675 24,394 3,343 0.0056
2021-08-05 2018-12-31 13F/A-1 MONOLITHIC PWR SYS COM 609839105 281 243 639.47 33 560.00 0.0267
2019-02-07 2018-12-31 13F MONOLITHIC PWR SYS COM 609839105 24,880 -340 2,891 0.0051
2021-09-01 2018-09-30 13F/A-1 MONOLITHIC PWR SYS COM 0125 609839105 38 27 245.45 5 400.00 0.0080
2018-11-07 2018-09-30 13F MONOLITHIC PWR SYS COM 609839105 25,220 25,209 3,166 0.0047
2021-09-01 2018-06-30 13F/A-1 MONOLITHIC PWR SYS COM 609839105 11 0 0.00 1 0.00 0.0036
2018-08-13 2018-06-30 13F MONOLITHIC PWR SYS COM 609839105 25,145 25,134 3,361 0.0050
2021-09-01 2018-03-31 13F/A-1 MONOLITHIC PWR SYS COM 609839105 11 -26,678 -99.96 1 -99.97 0.0130
2018-05-04 2018-03-31 13F MONOLITHIC PWR SYS COM 609839105 26,954 265 3,120 0.0048
2018-02-13 2017-12-31 13F MONOLITHIC PWR SYS COM 609839105 26,689 -20 -0.07 2,999 5.38 0.0041
2017-11-02 2017-09-30 13F MONOLITHIC PWR SYS COM 609839105 26,709 -80,980 -75.20 2,846 -72.58 0.0047
2017-08-07 2017-06-30 13F MONOLITHIC PWR SYS COM 609839105 107,689 -79,040 -42.33 10,381 -39.63 0.0154
2017-05-10 2017-03-31 13F MONOLITHIC PWR SYS COM 609839105 186,729 -57,635 -23.59 17,197 -14.11 0.0268
2017-02-07 2016-12-31 13F MONOLITHIC PWR SYS COM 609839105 244,364 164,955 207.73 20,021 213.17 0.0322
2016-11-04 2016-09-30 13F MONOLITHIC PWR SYS COM 609839105 79,409 -15,725 -16.53 6,393 -1.63 0.0106
2016-08-09 2016-06-30 13F MONOLITHIC PWR SYS COM 609839105 95,134 1,280 1.36 6,499 8.81 0.0109
2016-05-09 2016-03-31 13F MONOLITHIC PWR SYS COM 609839105 93,854 8,897 10.47 5,973 10.35 0.0107
2016-02-12 2015-12-31 13F MONOLITHIC PWR SYS COM 609839105 84,957 500 0.59 5,413 25.19 0.0098
2015-11-10 2015-09-30 13F MONOLITHIC PWR SYS COM 609839105 84,457 -60,700 -41.82 4,324 -41.26 0.0085
2015-08-06 2015-06-30 13F MONOLITHIC PWR SYS COM 609839105 145,157 -10,900 -6.98 7,361 -10.41 0.0131
2015-05-01 2015-03-31 13F MONOLITHIC PWR SYS COM 609839105 156,057 5,400 3.58 8,216 9.63 0.0142
2015-02-06 2014-12-31 13F MONOLITHIC PWR SYS COM 609839105 150,657 -7,800 -4.92 7,494 7.36 0.0136
2014-11-12 2014-09-30 13F MONOLITHIC PWR SYS COM 609839105 158,457 34,302 27.63 6,980 32.75 0.0131
2014-08-13 2014-06-30 13F MONOLITHIC PWR SYS COM 609839105 124,155 43,548 54.03 5,258 68.26 0.0093
2014-05-14 2014-03-31 13F MONOLITHIC PWR SYS COM 609839105 80,607 1,800 2.28 3,125 14.43 0.0058
2014-02-11 2013-12-31 13F MONOLITHIC PWR SYS COM 609839105 78,807 1,260 1.62 2,731 16.31 0.0054
2013-11-07 2013-09-30 13F MONOLITHIC PWR SYS COM 609839105 77,547 5,200 7.19 2,348 34.63 0.0050
2013-08-07 2013-06-30 13F MONOLITHIC PWR SYS COM 609839105 72,347 72,347 1,744 0.0039
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.