Monolithic Power Systems, Inc.
MX ˙ BMV ˙ US6098391054
SecurityMX:MPWR / Monolithic Power Systems, Inc.
InstitutionTownsquare Capital Llc
Latest Disclosed Ownership215 shares
Latest Disclosed Value $ 235,071
Townsquare Capital Llc ownership in MPWR / Monolithic Power Systems, Inc.

On May 13, 2026 - Townsquare Capital Llc filed a 13F-HR form disclosing ownership of 215 shares of Monolithic Power Systems, Inc. (MX:MPWR) valued at $235,071 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 0 shares of Monolithic Power Systems, Inc..

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 215 215 235 0.0224
2026-02-11 2025-12-31 13F MONOLITHIC PWR SYS COM 609839105 0 -938 -100.00 0 -100.00
2025-11-03 2025-09-30 13F MONOLITHIC PWR SYS COM 609839105 938 -1,001 -51.62 864 -39.14 0.1306
2025-08-13 2025-06-30 13F MONOLITHIC PWR SYS COM 609839105 1,939 -15,112 -88.63 1,418 -85.66 0.1381
2025-05-12 2025-03-31 13F MONOLITHIC PWR SYS COM 609839105 17,051 667 4.07 9,889 2.01 0.1053
2025-02-13 2024-12-31 13F MONOLITHIC PWR SYS COM 609839105 16,384 7,315 80.66 9,695 15.63 0.1094
2024-11-13 2024-09-30 13F MONOLITHIC PWR SYS COM 609839105 9,069 -558 -5.80 8,385 5.99 0.1004
2024-08-14 2024-06-30 13F MONOLITHIC PWR SYS COM 609839105 9,627 375 4.05 7,911 26.22 0.1079
2024-05-15 2024-03-31 13F MONOLITHIC PWR SYS COM 609839105 9,252 -123 -1.31 6,267 5.99 0.0918
2024-02-15 2023-12-31 13F MONOLITHIC PWR SYS COM 609839105 9,375 506 5.71 5,914 44.33 0.1013
2023-11-15 2023-09-30 13F MONOLITHIC PWR SYS COM 609839105 8,869 -3,540 -28.53 4,098 -38.88 0.0748
2023-11-13 2023-06-30 13F MONOLITHIC PWR SYS COM 609839105 12,409 1,253 11.23 6,704 20.04 0.1221
2023-05-11 2023-03-31 13F MONOLITHIC PWR SYS COM 609839105 11,156 378 3.51 5,584 46.52 0.1230
2023-02-13 2022-12-31 13F MONOLITHIC PWR SYS COM 609839105 10,778 2,971 38.06 3,811 34.33 0.0943
2022-11-14 2022-09-30 13F MONOLITHIC PWR SYS COM 609839105 7,807 -334 -4.10 2,837 -9.27 0.0812
2022-08-08 2022-06-30 13F MONOLITHIC PWR SYS COM 609839105 8,141 -732 -8.25 3,127 -27.43 0.0888
2022-04-28 2022-03-31 13F MONOLITHIC PWR SYS COM 609839105 8,873 280 3.26 4,309 1.68 0.0797
2022-04-28 2022-03-31 13F MONOLITHIC PWR SYS COM 609839105 8,873 4,309
2022-02-11 2021-12-31 13F MONOLITHIC PWR SYS COM 609839105 8,593 542 6.73 4,238 8.58 0.1063
2021-11-15 2021-09-30 13F MONOLITHIC PWR SYS COM 609839105 8,051 1,232 18.07 3,903 49.25 0.1124
2021-08-16 2021-06-30 13F MONOLITHIC PWR SYS COM 609839105 6,819 1,665 32.31 2,615 43.60 0.0845
2021-05-17 2021-03-31 13F MONOLITHIC PWR SYS COM 609839105 5,154 231 4.69 1,821 1.00 0.0708
2021-02-16 2020-12-31 13F MONOLITHIC PWR SYS COM 609839105 4,923 603 13.96 1,803 45.64 0.0802
2020-12-01 2020-09-30 13F/A-2 MONOLITHIC PWR SYS COM 609839105 4,320 422 10.83 1,238 31.01 0.0722
2020-11-16 2020-09-30 13F MONOLITHIC PWR SYS COM 609839105 3,898 0 945 24,034.2003
2020-08-17 2020-06-30 13F MONOLITHIC PWR SYS COM 609839105 3,898 -163 -4.01 945 23.05 0.0642
2020-05-18 2020-03-31 13F MONOLITHIC PWR SYS COM 609839105 4,061 -122 -2.92 768 3.09 0.0621
2020-05-18 2019-12-31 13F MONOLITHIC PWR SYS COM 609839105 4,183 223 5.63 745 15.15 0.0605
2019-11-14 2019-09-30 13F MONOLITHIC PWR SYS COM 609839105 3,960 158 4.16 647 16.16 0.0535
2019-08-15 2019-06-30 13F MONOLITHIC PWR SYS COM 609839105 3,802 -808 -17.53 557 -10.88 0.0530
2019-05-15 2019-03-31 13F MONOLITHIC PWR SYS COM 609839105 4,610 1,448 45.79 625 49.16 0.0482
2019-02-12 2018-12-31 13F MONOLITHIC PWR SYS COM 609839105 3,162 3,162 419 0.0545
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.