Monolithic Power Systems, Inc.
US ˙ NasdaqGS ˙ US6098391054

SecurityMPWR / Monolithic Power Systems, Inc.
InstitutionONEQ - Fidelity Nasdaq Composite Index Tracking Stock
Latest Disclosed Ownership11,600 shares
Latest Disclosed Value $ 7,678,040
ONEQ - Fidelity Nasdaq Composite Index Tracking Stock reports 0.43% increase in ownership of MPWR / Monolithic Power Systems, Inc.

On July 24, 2025 - ONEQ - Fidelity Nasdaq Composite Index Tracking Stock filed a NPORT-P form disclosing ownership of 11,600 shares of Monolithic Power Systems, Inc. (US:MPWR) valued at $7,678,040 USD as of May 31, 2025. The entity filed a previous NPORT-P on April 25, 2025 disclosing 11,550 shares of Monolithic Power Systems, Inc.. This represents a change in shares of 0.43% during the quarter. The current value of the position is $17,180,180 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)
2025-07-24 2025-05-31 NP MONOLITHIC POWER SYS EC US6098391054 11,600 50 0.43 7,678 8.80 0.1015
2025-04-25 2025-02-28 NP MONOLITHIC POWER SYS EC US6098391054 11,550 270 2.39 7,057 10.23 0.0951
2025-01-27 2024-11-30 NP MONOLITHIC POWER SYS EC US6098391054 11,280 70 0.62 6,403 -38.89 0.0868
2024-10-29 2024-08-31 NP MONOLITHIC POWER SYS EC US6098391054 11,210 95 0.85 10,478 28.14 0.1552
2024-07-26 2024-05-31 NP MONOLITHIC POWER SYS EC US6098391054 11,115 464 4.36 8,177 6.61 0.1296
2024-04-24 2024-02-29 NP MONOLITHIC POWER SYS EC US6098391054 10,651 155 1.48 7,669 33.17 0.1280
2024-01-24 2023-11-30 NP MONOLITHIC POWER SYS EC US6098391054 10,496 15 0.14 5,759 5.44 0.1105
2023-10-27 2023-08-31 NP MONOLITHIC POWER SYS EC US6098391054 10,481 150 1.45 5,463 7.92 0.1067
2023-07-26 2023-05-31 NP MONOLITHIC POWER SYS EC US6098391054 10,331 30 0.29 5,061 1.46 0.1092
2023-04-27 2023-02-28 NP MONOLITHIC POWER SYS EC US6098391054 10,301 225 2.23 4,989 29.63 0.1220
2023-01-26 2022-11-30 NP MONOLITHIC POWER SYS EC US6098391054 10,076 235 2.39 3,849 -13.70 0.0962
2022-10-26 2022-08-31 NP MONOLITHIC POWER SYS EC US6098391054 9,841 335 3.52 4,460 4.16 0.1115
2022-07-29 2022-05-31 NP MONOLITHIC POWER SYS EC US6098391054 9,506 260 2.81 4,281 0.94 0.1091
2022-04-28 2022-02-28 NP MONOLITHIC POWER SYS EC US6098391054 9,246 130 1.43 4,241 -15.94 0.0983
2022-01-25 2021-11-30 NP MONOLITHIC POWER SYS EC US6098391054 9,116 215 2.42 5,045 14.53 0.1054
2021-10-26 2021-08-31 NP MONOLITHIC POWER SYS EC US6098391054 8,901 165 1.89 4,405 46.98 0.0965
2021-07-22 2021-05-31 NP MONOLITHIC POWER SYS EC US6098391054 8,736 -124 -1.40 2,997 -9.67 0.0745
2021-04-23 2021-02-28 NP MONOLITHIC POWER SYS EC US6098391054 8,860 495 5.92 3,318 23.99 0.0864
2021-01-20 2020-11-30 NP MONOLITHIC POWER SYS EC US6098391054 8,365 -186 -2.18 2,676 17.16 0.0800
2020-10-16 2020-08-31 NP MONOLITHIC POWER SYS EC US6098391054 8,551 156 1.86 2,284 29.77 0.0705
2020-07-20 2020-05-31 NP MONOLITHIC POWER SYS EC US6098391054 8,395 1,373 19.55 1,761 58.13 0.0687
2020-04-24 2020-02-29 NP MONOLITHIC POWER SYS EC US6098391054 7,022 549 8.48 1,114 7.02 0.0497
2020-01-16 2019-11-30 NP MONOLITHIC POWER SYS EC US6098391054 6,473 6,473 1,040 0.0472
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.