Monolithic Power Systems, Inc.
US ˙ NasdaqGS ˙ US6098391054

SecurityMPWR / Monolithic Power Systems, Inc.
InstitutionPacer Advisors, Inc.
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Pacer Advisors, Inc. closes position in MPWR / Monolithic Power Systems, Inc.

On May 6, 2026 - Pacer Advisors, Inc. filed a 13F-HR form disclosing ownership of 0 shares of Monolithic Power Systems, Inc. (US:MPWR) valued at $0 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on February 24, 2026 disclosing 50,654 shares of Monolithic Power Systems, Inc.. This represents a change in shares of -100.00% during the quarter. The current value of the position is $0 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)
2026-05-06 2026-03-31 13F Monolithic Power Systems Common Stock - Domestic 609839105 0 -50,654 -100.00 0 -100.00
2026-02-24 2025-12-31 13F/A-1 Monolithic Power Systems Common Stock - Domestic 609839105 50,654 -6,989 -12.12 45,911 -13.49 0.1173
2025-10-15 2025-09-30 13F Monolithic Power Systems Common Stock - Domestic 609839105 57,643 3,968 7.39 53,068 35.18 0.1336
2025-08-12 2025-06-30 13F Monolithic Power Systems Common Stock - Domestic 609839105 53,675 43,989 454.15 39,257 598.88 0.0976
2025-05-06 2025-03-31 13F Monolithic Power Systems Common Stock - Domestic 609839105 9,686 1,493 18.22 5,618 15.89 0.0131
2025-01-22 2024-12-31 13F Monolithic Power Systems Common Stock - Domestic 609839105 8,193 -340 -3.98 4,848 -38.55 0.0105
2024-11-12 2024-09-30 13F Monolithic Power Systems Common Stock - Domestic 609839105 8,533 663 8.42 7,889 21.99 0.0167
2024-08-13 2024-06-30 13F Monolithic Power Systems Common Stock - Domestic 609839105 7,870 684 9.52 6,467 32.85 0.0147
2024-05-10 2024-03-31 13F Monolithic Power Systems Common Stock - Domestic 609839105 7,186 1,062 17.34 4,868 26.02 0.0112
2024-01-16 2023-12-31 13F MONOLITHIC PWR SYS Common Stock - Domestic 609839105 6,124 -12,842 -67.71 3,863 -55.92 0.0109
2023-11-13 2023-09-30 13F MONOLITHIC PWR SYS Common Stock - Domestic 609839105 18,966 -4,878 -20.46 8,762 -31.98 0.0336
2023-07-12 2023-06-30 13F MONOLITHIC PWR SYS Common Stock - Domestic 609839105 23,844 -8,161 -25.50 12,881 -19.59 0.0519
2023-05-02 2023-03-31 13F MONOLITHIC PWR SYS Common Stock - Domestic 609839105 32,005 31,079 3,356.26 16,020 4,798.78 0.0684
2023-02-06 2022-12-31 13F MONOLITHIC PWR SYS Common Stock - Domestic 609839105 926 -25,338 -96.47 327 -96.57 0.0017
2022-10-18 2022-09-30 13F MONOLITHIC PWR SYS Common Stock - Domestic 609839105 26,264 26,061 12,837.93 9,544 12,135.90 0.0665
2022-08-12 2022-06-30 13F MONOLITHIC PWR SYS Common Stock - Domestic 609839105 203 -22,465 -99.10 78 -99.29 0.0006
2022-04-05 2022-03-31 13F MONOLITHIC PWR SYS Common Stock - Domestic 609839105 22,668 11,727 107.18 11,009 103.95 0.0902
2022-02-03 2021-12-31 13F MONOLITHIC PWR SYS Common Stock - Domestic 609839105 10,941 8,591 365.57 5,398 373.92 0.0554
2021-10-15 2021-09-30 13F MONOLITHIC PWR SYS Common Stock - Domestic 609839105 2,350 -22 -0.93 1,139 28.56 0.0144
2021-07-21 2021-06-30 13F MONOLITHIC PWR SYS Common Stock - Domestic 609839105 2,372 -85 -3.46 886 2.07 0.0127
2021-04-05 2021-03-31 13F MONOLITHIC PWR SYS Common Stock 609839105 2,457 -1,981 -44.64 868 -46.58 0.0151
2021-01-20 2020-12-31 13F MONOLITHIC PWR SYS Common Stock 609839105 4,438 -5,326 -54.55 1,625 -40.48 0.0305
2020-10-19 2020-09-30 13F MONOLITHIC PWR SYS Common Stock 609839105 9,764 9,702 15,648.39 2,730 18,100.00 0.0581
2020-07-29 2020-06-30 13F MONOLITHIC PWR SYS Common Stock 609839105 62 -4 -6.06 15 25.00 0.0003
2020-04-23 2020-03-31 13F MONOLITHIC PWR SYS Common Stock 609839105 66 -13,498 -99.51 12 -99.50 0.0002
2020-02-10 2019-12-31 13F MONOLITHIC PWR SYS Common Stock 609839105 13,564 -1,105 -7.53 2,415 5.78 0.1091
2019-10-10 2019-09-30 13F MONOLITHIC PWR SYS Common Stock 609839105 14,669 -1,137 -7.19 2,283 6.38 0.0513
2019-08-12 2019-06-30 13F MONOLITHIC PWR SYS Common Stock 609839105 15,806 15,716 17,462.22 2,146 17,783.33 0.0525
2019-04-10 2019-03-31 13F MONOLITHIC PWR SYS Common Stock 609839105 90 -93 -50.82 12 -42.86 0.0003
2019-02-13 2018-12-31 13F MONOLITHIC PWR SYS Common Stock 609839105 183 -14,071 -98.72 21 -98.83 0.0007
2018-11-14 2018-09-30 13F MONOLITHIC PWR SYS Common Stock 609839105 14,254 2,247 18.71 1,789 11.46 0.0673
2018-08-14 2018-06-30 13F MONOLITHIC PWR SYS Common Stock 609839105 12,007 1,282 11.95 1,605 29.23 0.0726
2018-05-14 2018-03-31 13F Monolithic Power Systems COM 609839105 10,725 1,538 16.74 1,242 20.35 0.0687
2018-02-14 2017-12-31 13F Monolithic Power Systems Com 609839105 9,187 2,933 46.90 1,032 54.95 0.0724
2017-11-08 2017-09-30 13F Monolithic Power Systems Com 609839105 6,254 650 11.60 666 23.33 0.0590
2017-08-08 2017-06-30 13F MONOLITHIC PWR SYS Com 609839105 5,604 830 17.39 540 22.73 0.0534
2017-05-09 2017-03-31 13F MONOLITHIC PWR SYS Com 609839105 4,774 633 15.29 440 29.79 0.0539
2017-02-08 2016-12-31 13F MONOLITHIC PWR SYS Com 609839105 4,141 390 10.40 339 12.25 0.0483
2016-11-10 2016-09-30 13F MONOLITHIC PWR SYS Com 609839105 3,751 3,751 302 0.0459
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.