Monolithic Power Systems, Inc.
MX ˙ BMV ˙ US6098391054
SecurityMX:MPWR / Monolithic Power Systems, Inc.
InstitutionPnc Financial Services Group, Inc.
Latest Disclosed Ownership14,172 shares
Latest Disclosed Value $ 15,495,205
Pnc Financial Services Group, Inc. reports 6.52% increase in ownership of MPWR / Monolithic Power Systems, Inc.

On May 8, 2026 - Pnc Financial Services Group, Inc. filed a 13F-HR form disclosing ownership of 14,172 shares of Monolithic Power Systems, Inc. (MX:MPWR) valued at $15,495,205 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 13,304 shares of Monolithic Power Systems, Inc.. This represents a change in shares of 6.52% 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)
2026-05-08 2026-03-31 13F MONOLITHIC PWR SYS COM 609839105 14,172 868 6.52 15,495 28.50 0.0015
2026-02-06 2025-12-31 13F MONOLITHIC PWR SYS COM 609839105 13,304 116 0.88 12,058 -0.68 0.0066
2025-11-07 2025-09-30 13F MONOLITHIC PWR SYS COM 609839105 13,188 -142 -1.07 12,141 24.54 0.0074
2025-08-08 2025-06-30 13F MONOLITHIC PWR SYS COM 609839105 13,330 2,874 27.49 9,749 60.77 0.0063
2025-05-09 2025-03-31 13F MONOLITHIC PWR SYS COM 609839105 10,456 1,012 10.72 6,064 8.52 0.0032
2025-02-07 2024-12-31 13F MONOLITHIC PWR SYS COM 609839105 9,444 -695 -6.85 5,588 -40.38 0.0037
2024-11-08 2024-09-30 13F MONOLITHIC PWR SYS COM 609839105 10,139 1,167 13.01 9,374 27.16 0.0060
2024-08-09 2024-06-30 13F MONOLITHIC PWR SYS COM 609839105 8,972 396 4.62 7,372 26.89 0.0049
2024-05-10 2024-03-31 13F MONOLITHIC PWR SYS COM 609839105 8,576 302 3.65 5,810 11.30 0.0040
2024-03-22 2023-12-31 13F/A-1 MONOLITHIC PWR SYS COM 609839105 8,274 988 13.56 5,219 55.10 0.0041
2024-02-09 2023-12-31 13F MONOLITHIC PWR SYS COM 609839105 8,274 988 5,219 0.0008
2023-11-13 2023-09-30 13F MONOLITHIC PWR SYS COM 609839105 7,286 519 7.67 3,366 -7.93 0.0029
2023-08-11 2023-06-30 13F MONOLITHIC PWR SYS COM 609839105 6,767 377 5.90 3,656 14.29 0.0031
2023-05-15 2023-03-31 13F MONOLITHIC PWR SYS COM 609839105 6,390 -1,125 -14.97 3,198 20.36 0.0028
2023-02-10 2022-12-31 13F MONOLITHIC PWR SYS COM 609839105 7,515 752 11.12 2,657 8.05 0.0026
2022-11-10 2022-09-30 13F MONOLITHIC PWR SYS COM 609839105 6,763 3,233 91.59 2,459 81.48 0.0026
2022-08-12 2022-06-30 13F MONOLITHIC PWR SYS COM 609839105 3,530 571 19.30 1,355 -5.71 0.0013
2022-05-12 2022-03-31 13F MONOLITHIC PWR SYS COM 609839105 2,959 1,128 61.61 1,437 59.14 0.0013
2022-02-11 2021-12-31 13F MONOLITHIC Common Stock 609839105 1,831 180 10.90 903 13.02 0.0007
2021-11-05 2021-09-30 13F MONOLITHIC Common Stock 609839105 1,651 58 3.64 799 34.51 0.0007
2021-08-06 2021-06-30 13F MONOLITHIC Common Stock 609839105 1,593 48 3.11 594 8.79 0.0005
2021-05-07 2021-03-31 13F MONOLITHIC Common Stock 609839105 1,545 -768 -33.20 546 -35.54 0.0005
2021-02-12 2020-12-31 13F MONOLITHIC Common Stock 609839105 2,313 -22 -0.94 847 29.51 0.0009
2020-11-06 2020-09-30 13F MONOLITHIC Common Stock 609839105 2,335 -473 -16.84 654 -1.65 0.0008
2020-08-28 2020-06-30 13F/A-1 MONOLITHIC Common Stock 609839105 2,808 -10 -0.35 665 40.89 0.0009
2020-08-07 2020-06-30 13F MONOLITHIC Common Stock 609839105 2,808 -10 665 138.0795
2020-05-08 2020-03-31 13F MONOLITHIC Common Stock 609839105 2,818 -16 -0.56 472 -6.53 0.0006
2020-02-07 2019-12-31 13F MONOLITHIC Common Stock 609839105 2,834 -171 -5.69 505 7.91 0.0005
2019-11-08 2019-09-30 13F MONOLITHIC Common Stock 609839105 3,005 57 1.93 468 17.00 0.0005
2019-08-09 2019-06-30 13F MONOLITHIC Common Stock 609839105 2,948 -1,127 -27.66 400 -27.54 0.0004
2019-05-10 2019-03-31 13F MONOLITHIC Common Stock 609839105 4,075 -2,537 -38.37 552 -28.22 0.0006
2019-02-08 2018-12-31 13F MONOLITHIC Common Stock 609839105 6,612 3,596 119.23 769 102.90 0.0009
2018-11-09 2018-09-30 13F MONOLITHIC Common Stock 609839105 3,016 -1,840 -37.89 379 -41.69 0.0004
2018-08-10 2018-06-30 13F MONOLITHIC Common Stock 609839105 4,856 204 4.39 650 20.59 0.0006
2018-05-11 2018-03-31 13F MONOLITHIC Common Stock 609839105 4,652 -370 -7.37 539 -4.43 0.0005
2018-02-09 2017-12-31 13F MONOLITHIC Common Stock 609839105 5,022 -1,344 -21.11 564 -16.69 0.0005
2017-11-13 2017-09-30 13F MONOLITHIC Common Stock 609839105 6,366 -104 -1.61 677 8.49 0.0007
2017-08-11 2017-06-30 13F MONOLITHIC 609839105 6,470 -1,584 -19.67 624 -15.90 0.0007
2017-05-12 2017-03-31 13F MONOLITHIC Common Stock 609839105 8,054 34 0.42 742 13.11 0.0008
2017-02-10 2016-12-31 13F MONOLITHIC Common Stock 609839105 8,020 -3 -0.04 656 1.55 0.0007
2016-11-04 2016-09-30 13F MONOLITHIC Common Stock 609839105 8,023 -335 -4.01 646 13.13 0.0008
2016-08-05 2016-06-30 13F MONOLITHIC Common Stock 609839105 8,358 1,984 31.13 571 40.64 0.0007
2016-05-06 2016-03-31 13F MONOLITHIC Common Stock 609839105 6,374 -642 -9.15 406 -8.97 0.0005
2016-02-05 2015-12-31 13F MONOLITHIC Common Stock 609839105 7,016 -94 -1.32 446 22.53 0.0005
2015-11-06 2015-09-30 13F MONOLITHIC Common Stock 609839105 7,110 -608 -7.88 364 -6.67 0.0004
2015-08-05 2015-06-30 13F MONOLITHIC Common Stock 609839105 7,718 1,267 19.64 390 14.37 0.0004
2015-05-08 2015-03-31 13F MONOLITHIC Common Stock 609839105 6,451 2,664 70.35 341 80.42 0.0004
2015-02-06 2014-12-31 13F/A-1 MONOLITHIC PWR SYS COM 609839105 3,787 2,392 171.47 189 209.84 0.0002
2015-02-06 2014-12-31 13F MONOLITHIC PWR SYS COM 609839105 3,787 189
2014-11-07 2014-09-30 13F MONOLITHIC PWR SYS COM 609839105 1,395 -80 -5.42 61 -1.61 0.0001
2014-08-08 2014-06-30 13F MONOLITHIC PWR SYS COM 609839105 1,475 83 5.96 62 14.81 0.0001
2014-05-09 2014-03-31 13F MONOLITHIC PWR SYS COM 609839105 1,392 126 9.95 54 22.73 0.0001
2014-02-07 2013-12-31 13F MONOLITHIC PWR SYS COM 609839105 1,266 1,119 761.22 44 1,000.00 0.0001
2013-11-01 2013-09-30 13F MONOLITHIC PWR SYS COM 609839105 147 -2,940 -95.24 4 -94.59 0.0000
2013-08-02 2013-06-30 13F MONOLITHIC PWR SYS COM 609839105 3,087 3,087 74 0.0001
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.