Monolithic Power Systems, Inc.
US ˙ NasdaqGS ˙ US6098391054

SecurityMPWR / Monolithic Power Systems, Inc.
InstitutionPanagora Asset Management Inc
Latest Disclosed Ownership42,075 shares
Latest Disclosed Value $ 46,002,701
Panagora Asset Management Inc reports 24.99% decrease in ownership of MPWR / Monolithic Power Systems, Inc.

On May 14, 2026 - Panagora Asset Management Inc filed a 13F-HR form disclosing ownership of 42,075 shares of Monolithic Power Systems, Inc. (US:MPWR) valued at $46,002,701 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 56,092 shares of Monolithic Power Systems, Inc.. This represents a change in shares of -24.99% during the quarter. The current value of the position is $62,315,179 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)
2026-05-14 2026-03-31 13F MONOLITHIC PWR SYS COM 609839105 42,075 -14,017 -24.99 46,003 -9.51 0.1723
2026-02-13 2025-12-31 13F MONOLITHIC PWR SYS COM 609839105 56,092 -6,515 -10.41 50,840 -11.80 0.1802
2025-11-13 2025-09-30 13F MONOLITHIC PWR SYS COM 609839105 62,607 224 0.36 57,639 26.33 0.2322
2025-08-13 2025-06-30 13F MONOLITHIC PWR SYS COM 609839105 62,383 -32,096 -33.97 45,626 -16.74 0.2056
2025-05-15 2025-03-31 13F MONOLITHIC PWR SYS COM 609839105 94,479 25,533 37.03 54,796 34.32 0.2737
2025-02-13 2024-12-31 13F MONOLITHIC PWR SYS COM 609839105 68,946 67,803 5,932.02 40,795 3,763.16 0.1885
2024-11-13 2024-09-30 13F MONOLITHIC PWR SYS COM 609839105 1,143 -27,192 -95.97 1,057 -95.46 0.0050
2024-07-29 2024-06-30 13F MONOLITHIC PWR SYS COM 609839105 28,335 26,775 1,716.35 23,282 2,104.73 0.1171
2024-05-07 2024-03-31 13F MONOLITHIC PWR SYS COM 609839105 1,560 -26 -1.64 1,057 5.60 0.0055
2024-02-08 2023-12-31 13F MONOLITHIC PWR SYS COM 609839105 1,586 0 0.00 1,000 36.61 0.0056
2023-10-31 2023-09-30 13F MONOLITHIC PWR SYS COM 609839105 1,586 0 0.00 733 -14.49 0.0046
2023-08-11 2023-06-30 13F MONOLITHIC PWR SYS COM 609839105 1,586 -23 -1.43 857 6.34 0.0050
2023-05-12 2023-03-31 13F MONOLITHIC PWR SYS COM 609839105 1,609 -1,034 -39.12 805 -13.81 0.0051
2023-02-13 2022-12-31 13F MONOLITHIC PWR SYS COM 609839105 2,643 -363 -12.08 935 -14.47 0.0061
2022-11-14 2022-09-30 13F MONOLITHIC PWR SYS COM 609839105 3,006 -28,704 -90.52 1,092 -91.03 0.0076
2022-08-15 2022-06-30 13F MONOLITHIC PWR SYS COM 609839105 31,710 -4,715 -12.94 12,178 -31.16 0.0798
2022-05-12 2022-03-31 13F MONOLITHIC PWR SYS COM 609839105 36,425 -71,838 -66.36 17,691 -66.88 0.0963
2022-02-10 2021-12-31 13F MONOLITHIC PWR SYS COM 609839105 108,263 35,581 48.95 53,409 51.61 0.2828
2021-11-10 2021-09-30 13F MONOLITHIC PWR SYS COM 609839105 72,682 23,037 46.40 35,228 90.01 0.1883
2021-08-11 2021-06-30 13F MONOLITHIC PWR SYS COM 609839105 49,645 47,500 2,214.45 18,540 2,345.91 0.0993
2021-05-12 2021-03-31 13F MONOLITHIC POWER SYSTEMS COMMON 609839105 2,145 1,586 283.72 758 269.76 0.0043
2021-02-10 2020-12-31 13F MONOLITHIC POWER SYSTEMS COMMON 609839105 559 0 0.00 205 31.41 0.0012
2020-11-13 2020-09-30 13F MONOLITHIC POWER SYSTEMS COMMON 609839105 559 0 0.00 156 18.18 0.0010
2020-08-12 2020-06-30 13F MONOLITHIC POWER SYSTEMS COMMON 609839105 559 0 0.00 132 40.43 0.0008
2020-05-14 2020-03-31 13F MONOLITHIC POWER SYSTEMS COMMON 609839105 559 559 94 0.0007
2017-11-14 2017-09-30 13F MONOLITHIC POWER SYSTEMS COMMON 609839105 0 -3,373 -100.00 0 -100.00
2017-08-14 2017-06-30 13F MONOLITHIC POWER SYSTEMS COMMON 609839105 3,373 2,299 214.06 325 228.28 0.0013
2017-05-15 2017-03-31 13F MONOLITHIC POWER SYSTEMS COMMON 609839105 1,074 -32,243 -96.78 99 -96.37 0.0004
2017-02-14 2016-12-31 13F MONOLITHIC POWER SYSTEMS COMMON 609839105 33,317 -29,777 -47.19 2,730 -46.25 0.0125
2016-11-14 2016-09-30 13F MONOLITHIC POWER SYSTEMS COMMON 609839105 63,094 0 0.00 5,079 17.81 0.0242
2016-08-15 2016-06-30 13F MONOLITHIC POWER SYSTEMS COMMON 609839105 63,094 -53,977 -46.11 4,311 -42.13 0.0214
2016-05-16 2016-03-31 13F MONOLITHIC POWER SYSTEMS COMMON 609839105 117,071 -4,119 -3.40 7,450 -3.51 0.0370
2016-02-12 2015-12-31 13F MONOLITHIC POWER SYSTEMS COMMON 609839105 121,190 6,341 5.52 7,721 31.31 0.0380
2015-11-13 2015-09-30 13F MONOLITHIC POWER SYSTEMS COMMON 609839105 114,849 1,664 1.47 5,880 2.44 0.0310
2015-08-14 2015-06-30 13F MONOLITHIC POWER SYSTEMS COMMON 609839105 113,185 36,884 48.34 5,740 42.89 0.0288
2015-05-15 2015-03-31 13F MONOLITHIC POWER SYSTEMS COMMON 609839105 76,301 6,208 8.86 4,017 15.23 0.0204
2015-02-13 2014-12-31 13F MONOLITHIC POWER SYSTEMS COMMON 609839105 70,093 -7,122 -9.22 3,486 2.50 0.0178
2014-11-12 2014-09-30 13F MONOLITHIC POWER SYSTEMS COMMON 609839105 77,215 -10,288 -11.76 3,401 -8.23 0.0165
2014-08-14 2014-06-30 13F MONOLITHIC POWER SYSTEMS COMMON 609839105 87,503 87,503 8,249.52 3,706 14,724.00 0.0180
2013-11-14 2013-09-30 13F MONOLITHIC POWER SYSTEMS COMMON 609839105 0 -1,048 -100.00 0 -100.00
2013-08-14 2013-06-30 13F MONOLITHIC POWER SYSTEMS COMMON 609839105 1,048 1,048 25 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.