Monolithic Power Systems, Inc.
MX ˙ BMV ˙ US6098391054
SecurityMX:MPWR / Monolithic Power Systems, Inc.
InstitutionCIBC Asset Management Inc
Latest Disclosed Ownership20,386 shares
Latest Disclosed Value $ 22,289,033
CIBC Asset Management Inc reports 1.72% increase in ownership of MPWR / Monolithic Power Systems, Inc.

On May 12, 2026 - CIBC Asset Management Inc filed a 13F-HR form disclosing ownership of 20,386 shares of Monolithic Power Systems, Inc. (MX:MPWR) valued at $22,289,033 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 20,041 shares of Monolithic Power Systems, Inc.. This represents a change in shares of 1.72% 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)
2026-05-12 2026-03-31 13F MONOLITHIC PWR SYS COM 609839105 20,386 345 1.72 22,289 22.71 0.0545
2026-02-10 2025-12-31 13F MONOLITHIC PWR SYS COM 609839105 20,041 13,423 202.83 18,164 198.16 0.0438
2025-10-31 2025-09-30 13F MONOLITHIC PWR SYS COM 609839105 6,618 13 0.20 6,093 26.13 0.0176
2025-08-14 2025-06-30 13F MONOLITHIC PWR SYS COM 609839105 6,605 -594 -8.25 4,831 15.69 0.0149
2025-05-13 2025-03-31 13F MONOLITHIC PWR SYS COM 609839105 7,199 -191 -2.58 4,175 -4.51 0.0139
2025-01-31 2024-12-31 13F MONOLITHIC PWR SYS COM 609839105 7,390 315 4.45 4,373 -33.15 0.0143
2024-11-06 2024-09-30 13F MONOLITHIC PWR SYS COM 609839105 7,075 555 8.51 6,541 22.08 0.0212
2024-08-01 2024-06-30 13F MONOLITHIC PWR SYS COM 609839105 6,520 -172 -2.57 5,357 18.18 0.0191
2024-05-09 2024-03-31 13F MONOLITHIC PWR SYS COM 609839105 6,692 218 3.37 4,533 11.02 0.0157
2024-02-13 2023-12-31 13F MONOLITHIC PWR SYS COM 609839105 6,474 -282 -4.17 4,084 30.82 0.0153
2023-10-30 2023-09-30 13F MONOLITHIC PWR SYS COM 609839105 6,756 297 4.60 3,121 -10.55 0.0129
2023-08-14 2023-06-30 13F MONOLITHIC PWR SYS COM 609839105 6,459 -57 -0.87 3,489 6.99 0.0134
2023-05-12 2023-03-31 13F MONOLITHIC PWR SYS COM 609839105 6,516 81 1.26 3,262 43.34 0.0129
2023-02-13 2022-12-31 13F MONOLITHIC PWR SYS COM 609839105 6,435 471 7.90 2,275 4.98 0.0096
2022-11-03 2022-09-30 13F MONOLITHIC PWR SYS COM 609839105 5,964 576 10.69 2,167 4.74 0.0095
2022-08-09 2022-06-30 13F MONOLITHIC PWR SYS COM 609839105 5,388 1,139 26.81 2,069 0.24 0.0084
2022-05-06 2022-03-31 13F MONOLITHIC PWR SYS COM 609839105 4,249 38 0.90 2,064 -0.63 0.0072
2022-02-08 2021-12-31 13F MONOLITHIC PWR SYS COM 609839105 4,211 276 7.01 2,077 8.91 0.0076
2021-11-09 2021-09-30 13F MONOLITHIC PWR SYS COM 609839105 3,935 149 3.94 1,907 34.87 0.0077
2021-08-16 2021-06-30 13F MONOLITHIC PWR SYS COM 609839105 3,786 68 1.83 1,414 7.69 0.0057
2021-05-14 2021-03-31 13F MONOLITHIC PWR SYS COM 609839105 3,718 2,080 126.98 1,313 118.83 0.0056
2021-02-03 2020-12-31 13F MONOLITHIC PWR SYS COM 609839105 1,638 0 0.00 600 31.00 0.0028
2020-11-05 2020-09-30 13F MONOLITHIC PWR SYS COM 609839105 1,638 41 2.57 458 21.16 0.0023
2020-07-28 2020-06-30 13F MONOLITHIC PWR SYS COM 609839105 1,597 0 0.00 378 41.57 0.0022
2020-04-30 2020-03-31 13F MONOLITHIC PWR SYS COM 609839105 1,597 0 0.00 267 -5.99 0.0019
2020-02-14 2019-12-31 13F MONOLITHIC PWR SYS COM 609839105 1,597 139 9.53 284 25.11 0.0016
2019-10-30 2019-09-30 13F MONOLITHIC PWR SYS COM 609839105 1,458 1,458 227 0.0013
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.