Monolithic Power Systems, Inc.
US ˙ NasdaqGS ˙ US6098391054

SecurityMPWR / Monolithic Power Systems, Inc.
InstitutionAllianz Asset Management GmbH
Latest Disclosed Ownership96,474 shares
Latest Disclosed Value $ 105,479,848
Allianz Asset Management GmbH reports 33.76% decrease in ownership of MPWR / Monolithic Power Systems, Inc.

On May 11, 2026 - Allianz Asset Management GmbH filed a 13F-HR form disclosing ownership of 96,474 shares of Monolithic Power Systems, Inc. (US:MPWR) valued at $105,479,848 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 145,633 shares of Monolithic Power Systems, Inc.. This represents a change in shares of -33.76% during the quarter. The current value of the position is $142,882,818 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)
2026-05-11 2026-03-31 13F MONOLITHIC PWR SYS COM 609839105 96,474 -49,159 -33.76 105,480 -20.09 0.1106
2026-02-11 2025-12-31 13F MONOLITHIC PWR SYS COM 609839105 145,633 65,356 81.41 131,996 78.60 0.1335
2025-11-04 2025-09-30 13F MONOLITHIC PWR SYS COM 609839105 80,277 -30,275 -27.39 73,906 -8.59 0.0825
2025-07-28 2025-06-30 13F MONOLITHIC PWR SYS COM 609839105 110,552 27,589 33.25 80,856 68.03 0.0968
2025-05-05 2025-03-31 13F MONOLITHIC PWR SYS COM 609839105 82,963 -80,102 -49.12 48,119 -50.13 0.0630
2025-02-03 2024-12-31 13F MONOLITHIC PWR SYS COM 609839105 163,065 60,130 58.42 96,487 1.39 0.1288
2024-11-13 2024-09-30 13F MONOLITHIC PWR SYS COM 609839105 102,935 56,609 122.20 95,163 150.00 0.1331
2024-08-13 2024-06-30 13F MONOLITHIC PWR SYS COM 609839105 46,326 39,679 596.95 38,065 745.51 0.0564
2024-05-14 2024-03-31 13F MONOLITHIC PWR SYS COM 609839105 6,647 -2,561 -27.81 4,503 -22.49 0.0069
2024-02-12 2023-12-31 13F MONOLITHIC PWR SYS COM 609839105 9,208 -1,391 -13.12 5,808 18.63 0.0095
2023-11-13 2023-09-30 13F MONOLITHIC PWR SYS COM 609839105 10,599 -43,119 -80.27 4,897 -83.13 0.0083
2023-08-14 2023-06-30 13F MONOLITHIC PWR SYS COM 609839105 53,718 -38,463 -41.73 29,020 -37.10 0.0520
2023-05-11 2023-03-31 13F MONOLITHIC PWR SYS COM 609839105 92,181 -6,996 -7.05 46,140 31.57 0.0818
2023-02-13 2022-12-31 13F MONOLITHIC PWR SYS COM 609839105 99,177 1,398 1.43 35,070 -1.31 0.0681
2022-11-08 2022-09-30 13F MONOLITHIC PWR SYS COM 609839105 97,779 -95,516 -49.41 35,533 -52.13 0.0723
2022-08-12 2022-06-30 13F MONOLITHIC PWR SYS COM 609839105 193,295 40,252 26.30 74,233 -0.13 0.0705
2022-05-13 2022-03-31 13F MONOLITHIC PWR SYS COM 609839105 153,043 25,277 19.78 74,330 17.93 0.0554
2022-02-11 2021-12-31 13F MONOLITHIC PWR SYS COM 609839105 127,766 -13,583 -9.61 63,031 -8.00 0.0441
2021-11-10 2021-09-30 13F MONOLITHIC PWR SYS COM 609839105 141,349 4,873 3.57 68,510 34.42 0.0533
2021-08-16 2021-06-30 13F MONOLITHIC PWR SYS COM 609839105 136,476 75,533 123.94 50,967 136.77 0.0434
2021-05-13 2021-03-31 13F MONOLITHIC PWR SYS COM 609839105 60,943 -13,098 -17.69 21,526 -20.62 0.0209
2021-02-16 2020-12-31 13F MONOLITHIC PWR SYS COM 609839105 74,041 -7,311 -8.99 27,116 19.21 0.0268
2020-11-13 2020-09-30 13F MONOLITHIC PWR SYS COM 609839105 81,352 -2,188 -2.62 22,747 14.89 0.0264
2020-08-14 2020-06-30 13F MONOLITHIC PWR SYS COM 609839105 83,540 -8,556 -9.29 19,799 28.38 0.0229
2020-05-14 2020-03-31 13F MONOLITHIC PWR SYS COM 609839105 92,096 9,757 11.85 15,422 5.21 0.0207
2020-02-13 2019-12-31 13F MONOLITHIC PWR SYS COM 609839105 82,339 -91,757 -52.70 14,658 -45.90 0.0134
2019-11-13 2019-09-30 13F MONOLITHIC PWR SYS COM 609839105 174,096 -59,548 -25.49 27,095 -14.59 0.0266
2019-08-08 2019-06-30 13F MONOLITHIC PWR SYS COM 609839105 233,644 158,961 212.85 31,724 213.51 0.0295
2019-05-13 2019-03-31 13F MONOLITHIC PWR SYS COM 609839105 74,683 -33,171 -30.76 10,119 -19.29 0.0100
2019-04-02 2018-12-31 13F/A-1 MONOLITHIC PWR SYS COM 609839105 107,854 -29,435 -21.44 12,538 -27.25 0.0137
2019-02-13 2018-12-31 13F MONOLITHIC PWR SYS COM 609839105 107,854 -29,435 12,538
2019-04-09 2018-09-30 13F/A-1 MONOLITHIC PWR SYS COM 609839105 137,289 15,573 12.79 17,234 5.93 0.0156
2018-11-13 2018-09-30 13F MONOLITHIC PWR SYS COM 609839105 137,289 15,573 17,234
2019-04-09 2018-06-30 13F/A-1 MONOLITHIC PWR SYS COM 609839105 121,716 60,557 99.02 16,269 129.76 0.0158
2018-08-13 2018-06-30 13F MONOLITHIC PWR SYS COM 609839105 121,716 60,557 16,269
2019-04-09 2018-03-31 13F/A-2 MONOLITHIC PWR SYS COM 609839105 61,159 -4,540 -6.91 7,081 -4.08 0.0068
2018-05-23 2018-03-31 13F/A-1 MONOLITHIC PWR SYS COM 609839105 61,159 0 7,081 0.0068
2018-05-14 2018-03-31 13F MONOLITHIC PWR SYS COM 609839105 61,159 -4,540 7,081
2019-04-17 2017-12-31 13F/A-1 MONOLITHIC PWR SYS COM 609839105 65,699 -15,165 -18.75 7,382 -14.32 0.0058
2018-02-13 2017-12-31 13F MONOLITHIC PWR SYS COM 609839105 65,699 -15,165 7,382
2019-04-17 2017-09-30 13F/A-1 MONOLITHIC PWR SYS COM 609839105 80,864 3,169 4.08 8,616 14.88 0.0075
2017-11-13 2017-09-30 13F MONOLITHIC PWR SYS COM 609839105 80,864 3,169 8,616
2019-04-17 2017-06-30 13F/A-1 MONOLITHIC PWR SYS COM 609839105 77,695 -4,116 -5.03 7,500 -0.45 0.0073
2017-08-14 2017-06-30 13F MONOLITHIC PWR SYS COM 609839105 77,695 -4,116 7,500
2019-04-17 2017-03-31 13F/A-1 MONOLITHIC PWR SYS COM 609839105 81,811 -6,190 -7.03 7,534 4.49 0.0074
2017-05-15 2017-03-31 13F MONOLITHIC PWR SYS COM 609839105 81,811 -6,190 7,534
2019-04-17 2016-12-31 13F/A-2 MONOLITHIC PWR SYS COM 609839105 88,001 5,825 7.09 7,210 8.99 0.0065
2017-03-14 2016-12-31 13F/A-1 MONOLITHIC PWR SYS COM 609839105 88,001 0 7,210 0.0065
2017-02-13 2016-12-31 13F MONOLITHIC PWR SYS COM 609839105 88,001 7,210
2019-04-17 2016-09-30 13F/A-1 MONOLITHIC PWR SYS COM 609839105 82,176 -5,975 -6.78 6,615 9.85 0.0065
2016-11-14 2016-09-30 13F MONOLITHIC PWR SYS COM 609839105 82,176 -5,975 6,615
2017-01-24 2016-06-30 13F/A-1 MONOLITHIC PWR SYS COM 609839105 88,151 -6,390 -6.76 6,022 0.08 0.0064
2016-08-12 2016-06-30 13F MONOLITHIC PWR SYS COM 609839105 88,151 6,022
2016-05-13 2016-03-31 13F MONOLITHIC PWR SYS COM 609839105 94,541 -3,214 -3.29 6,017 -3.39 0.0069
2017-01-24 2015-12-31 13F/A-1 MONOLITHIC PWR SYS COM 609839105 97,755 -16,725 -14.61 6,228 6.26 0.0070
2016-02-16 2015-12-31 13F MONOLITHIC PWR SYS COM 609839105 97,755 6,228
2017-01-24 2015-09-30 13F/A-2 MONOLITHIC PWR SYS COM 609839105 114,480 114,480 5,861 0.0070
2015-11-20 2015-09-30 13F/A-1 MONOLITHIC PWR SYS COM 609839105 114,480 0 5,861 0.0061
2015-11-13 2015-09-30 13F MONOLITHIC PWR SYS COM 609839105 114,480 5,861 0.0061
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.