Monolithic Power Systems, Inc.
MX ˙ BMV ˙ US6098391054
SecurityMX:MPWR / Monolithic Power Systems, Inc.
InstitutionVictory Capital Management Inc
Latest Disclosed Ownership111,992 shares
Latest Disclosed Value $ 122,446,454
Victory Capital Management Inc reports 2.59% decrease in ownership of MPWR / Monolithic Power Systems, Inc.

On May 15, 2026 - Victory Capital Management Inc filed a 13F-HR form disclosing ownership of 111,992 shares of Monolithic Power Systems, Inc. (MX:MPWR) valued at $122,446,454 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 114,968 shares of Monolithic Power Systems, Inc.. This represents a change in shares of -2.59% 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)
2026-05-15 2026-03-31 13F MONOLITHIC PWR SYS COM 609839105 111,992 -2,976 -2.59 122,446 17.51 0.0588
2026-02-13 2025-12-31 13F MONOLITHIC PWR SYS COM 609839105 114,968 26,762 30.34 104,202 28.32 0.0588
2025-11-12 2025-09-30 13F MONOLITHIC PWR SYS COM 609839105 88,206 -3,651 -3.97 81,206 20.87 0.0475
2025-08-13 2025-06-30 13F MONOLITHIC PWR SYS COM 609839105 91,857 -325 -0.35 67,182 25.66 0.0433
2025-05-02 2025-03-31 13F MONOLITHIC PWR SYS COM 609839105 92,182 -44,745 -32.68 53,464 -34.01 0.0547
2025-02-06 2024-12-31 13F MONOLITHIC PWR SYS COM 609839105 136,927 36,934 36.94 81,020 -12.36 0.0796
2024-11-05 2024-09-30 13F MONOLITHIC PWR SYS COM 609839105 99,993 21,240 26.97 92,444 42.86 0.0891
2024-08-05 2024-06-30 13F MONOLITHIC PWR SYS COM 609839105 78,753 -1,641 -2.04 64,710 18.82 0.0649
2024-05-03 2024-03-31 13F MONOLITHIC PWR SYS COM 609839105 80,394 -42,541 -34.60 54,461 -29.77 0.0532
2024-02-05 2023-12-31 13F MONOLITHIC PWR SYS COM 609839105 122,935 -3,494 -2.76 77,545 32.76 0.0816
2023-11-06 2023-09-30 13F MONOLITHIC PWR SYS COM 609839105 126,429 18,648 17.30 58,410 0.32 0.0671
2023-07-27 2023-06-30 13F MONOLITHIC PWR SYS COM 609839105 107,781 -2,522 -2.29 58,227 5.46 0.0640
2023-05-02 2023-03-31 13F MONOLITHIC PWR SYS COM 609839105 110,303 -24,785 -18.35 55,211 15.58 0.0620
2023-04-25 2022-12-31 13F/A-3 MONOLITHIC PWR SYS COM 609839105 135,088 7,508 5.88 47,768 3.03 0.0550
2023-03-10 2022-12-31 13F/A-2 MONOLITHIC PWR SYS COM 609839105 135,088 7,508 47,768 0.0522
2023-02-10 2022-12-31 13F/A-1 MONOLITHIC PWR SYS COM 609839105 135,088 7,508 47,768 0.0329
2023-02-09 2022-12-31 13F MONOLITHIC PWR SYS COM 609839105 133,631 6,051 50,038 0.0340
2022-11-02 2022-09-30 13F MONOLITHIC PWR SYS COM 609839105 127,580 -28,842 -18.44 46,363 -22.82 0.0541
2022-08-01 2022-06-30 13F MONOLITHIC PWR SYS COM 609839105 156,422 -40,500 -20.57 60,072 -34.32 0.0684
2022-05-04 2022-03-31 13F MONOLITHIC PWR SYS COM 609839105 196,922 37,870 23.81 91,464 16.57 0.0915
2022-02-07 2021-12-31 13F MONOLITHIC PWR SYS COM 609839105 159,052 -38,828 -19.62 78,465 -18.19 0.0722
2021-11-02 2021-09-30 13F MONOLITHIC PWR SYS COM 609839105 197,880 -5,625 -2.76 95,909 26.20 0.0939
2021-08-03 2021-06-30 13F MONOLITHIC PWR SYS COM 609839105 203,505 29,956 17.26 75,998 23.98 0.0730
2021-05-04 2021-03-31 13F MONOLITHIC PWR SYS COM 609839105 173,549 -7,571 -4.18 61,300 -7.59 0.0628
2021-02-01 2020-12-31 13F MONOLITHIC PWR SYS COM 609839105 181,120 -50,266 -21.72 66,332 2.53 0.0739
2020-11-09 2020-09-30 13F MONOLITHIC PWR SYS COM 609839105 231,386 -10,446 -4.32 64,698 12.88 0.0830
2020-08-07 2020-06-30 13F MONOLITHIC PWR SYS COM 609839105 241,832 -315,194 -56.59 57,314 -38.56 0.0776
2020-05-12 2020-03-31 13F/A-1 MONOLITHIC PWR SYS COM 609839105 557,026 -37,311 -6.28 93,280 -11.84 0.1564
2020-05-04 2020-03-31 13F MONOLITHIC PWR SYS COM 609839105 557,026 -37,311 93,280 102,085.4812
2020-02-06 2019-12-31 13F/A-1 MONOLITHIC PWR SYS COM 609839105 594,337 -113,198 -16.00 105,804 -3.91 0.1284
2020-02-04 2019-12-31 13F MONOLITHIC PWR SYS COM 609839105 588,281 -119,254 100,697 120,704.5520
2019-11-12 2019-09-30 13F MONOLITHIC PWR SYS COM 609839105 707,535 -78,999 -10.04 110,113 3.11 0.1417
2019-08-15 2019-06-30 13F MONOLITHIC PWR SYS COM 609839105 786,534 233,860 42.31 106,795 42.62 0.2154
2019-05-03 2019-03-31 13F MONOLITHIC PWR SYS COM 609839105 552,674 170,806 44.73 74,882 68.68 0.1704
2019-05-02 2018-12-31 13F/A-1 MONOLITHIC PWR SYS COM 609839105 381,868 -1,271 -0.33 44,393 -7.70 0.1114
2019-02-05 2018-12-31 13F MONOLITHIC PWR SYS COM 609839105 381,868 -1,271 44,393
2018-11-01 2018-09-30 13F MONOLITHIC PWR SYS COM 609839105 383,139 -78,575 -17.02 48,095 -22.07 0.0992
2018-08-02 2018-06-30 13F MONOLITHIC PWR SYS COM 609839105 461,714 -124,535 -21.24 61,717 -9.07 0.1313
2018-05-04 2018-03-31 13F MONOLITHIC PWR SYS COM 609839105 586,249 -519 -0.09 67,870 2.94 0.1480
2018-02-01 2017-12-31 13F MONOLITHIC PWR SYS COM 609839105 586,768 -147,730 -20.11 65,930 -15.76 0.1388
2017-10-27 2017-09-30 13F MONOLITHIC PWR SYS COM 609839105 734,498 -90,990 -11.02 78,260 -1.66 0.1758
2017-08-07 2017-06-30 13F MONOLITHIC PWR SYS COM 609839105 825,488 15,645 1.93 79,577 6.69 0.1863
2017-05-10 2017-03-31 13F MONOLITHIC PWR SYS COM 609839105 809,843 -63,055 -7.22 74,587 4.29 0.1776
2017-02-09 2016-12-31 13F MONOLITHIC PWR SYS INC COM COM 609839105 872,898 -32,253 -3.56 71,516 -1.85 0.1804
2016-11-02 2016-09-30 13F MONOLITHIC PWR SYS INC COM COM 609839105 905,151 903,659 60,566.96 72,865 71,336.27 0.2041
2016-08-09 2016-06-30 13F MONOLITHIC PWR SYS COM 609839105 1,492 650 77.20 102 88.89 0.0004
2016-05-17 2016-03-31 13F/A-2 MONOLITHIC PWR SYS COM 609839105 842 -987 -53.96 54 -53.85 0.0002
2016-05-12 2016-03-31 13F/A-1 MONOLITHIC PWR SYS COM 609839105 842 0 54 0.0002
2016-05-12 2016-03-31 13F MONOLITHIC PWR SYS COM 609839105 842 54
2016-02-10 2015-12-31 13F MONOLITHIC PWR SYS COM 609839105 1,829 -60 -3.18 117 20.62 0.0005
2015-11-06 2015-09-30 13F MONOLITHIC PWR SYS COM 609839105 1,889 630 50.04 97 51.56 0.0004
2015-08-14 2015-06-30 13F/A-01 Monolithic Power Systems COM 609839105 1,259 1,259 64 0.0002
2015-08-07 2015-06-30 13F Monolithic Power Systems COM 609839105 1,259 64
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.