Monolithic Power Systems, Inc.
US ˙ NasdaqGS ˙ US6098391054

SecurityMPWR / Monolithic Power Systems, Inc.
InstitutionRenaissance Technologies Llc
ManagerJames Simons
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Renaissance Technologies Llc closes position in MPWR / Monolithic Power Systems, Inc.

On February 12, 2026 - Renaissance Technologies Llc filed a 13F-HR form disclosing ownership of 0 shares of Monolithic Power Systems, Inc. (US:MPWR) valued at $0 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 8,086 shares of Monolithic Power Systems, Inc.. 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-02-12 2025-12-31 13F MONOLITHIC PWR SYS COM 609839105 0 -100.00 0
2025-11-13 2025-09-30 13F MONOLITHIC PWR SYS COM 609839105 8,086 8,086 7,444 0.0098
2024-11-13 2024-09-30 13F MONOLITHIC PWR SYS COM 609839105 0 -686 -100.00 0 -100.00
2024-08-09 2024-06-30 13F MONOLITHIC PWR SYS COM 609839105 686 -19,400 -96.58 564 4,230.77 0.0010
2024-05-13 2024-03-31 13F MONOLITHIC PWR SYS COM 609839105 20,086 20,086 14 0.0214
2024-02-13 2023-12-31 13F MONOLITHIC PWR SYS COM 609839105 0 -188,386 -100.00 0 -100.00
2023-11-14 2023-09-30 13F MONOLITHIC PWR SYS COM 609839105 188,386 74,400 65.27 87 42.62 0.1484
2023-08-11 2023-06-30 13F MONOLITHIC PWR SYS COM 609839105 113,986 -80,400 -41.36 62 -37.11 0.0887
2023-05-12 2023-03-31 13F MONOLITHIC PWR SYS COM 609839105 194,386 102,200 110.86 97 203.13 0.1291
2023-02-13 2022-12-31 13F MONOLITHIC PWR SYS COM 609839105 92,186 -331,155 -78.22 33 -99.98 0.0446
2022-11-14 2022-09-30 13F MONOLITHIC PWR SYS COM 609839105 423,341 327,755 342.89 153,842 319.09 0.2176
2022-08-12 2022-06-30 13F MONOLITHIC PWR SYS COM 609839105 95,586 -57,940 -37.74 36,709 -50.77 0.0435
2022-05-13 2022-03-31 13F MONOLITHIC PWR SYS COM 609839105 153,526 -27,660 -15.27 74,565 -16.58 0.0875
2022-02-11 2021-12-31 13F MONOLITHIC PWR SYS COM 609839105 181,186 100,879 125.62 89,384 129.64 0.1112
2021-11-12 2021-09-30 13F MONOLITHIC PWR SYS COM 609839105 80,307 -22,479 -21.87 38,923 1.40 0.0503
2021-08-13 2021-06-30 13F MONOLITHIC PWR SYS COM 609839105 102,786 102,786 38,385 0.0479
2021-02-10 2020-12-31 13F MONOLITHIC PWR SYS COM 609839105 0 -164,286 -100.00 0 -100.00
2020-11-13 2020-09-30 13F MONOLITHIC PWR SYS COM 609839105 164,286 47,500 40.67 45,936 65.97 0.0459
2020-08-13 2020-06-30 13F MONOLITHIC PWR SYS COM 609839105 116,786 90,300 340.93 27,678 524.08 0.0239
2020-05-14 2020-03-31 13F MONOLITHIC PWR SYS COM 609839105 26,486 26,486 -77.32 4,435 -83.98 0.0043
2020-02-12 2019-12-31 13F MONOLITHIC PWR SYS COM 609839105 0 -3,586 -100.00 0 -100.00
2019-11-13 2019-09-30 13F MONOLITHIC PWR SYS COM 609839105 3,586 -65,500 -94.81 558 -94.05 0.0005
2019-08-12 2019-06-30 13F MONOLITHIC PWR SYS COM 609839105 69,086 69,086 9,380 0.0083
2019-05-14 2019-03-31 13F MONOLITHIC PWR SYS COM 609839105 0 -17,642 -100.00 0 -100.00
2019-02-12 2018-12-31 13F MONOLITHIC PWR SYS COM 609839105 17,642 17,642 2,051 0.0022
2018-11-13 2018-09-30 13F MONOLITHIC PWR SYS COM 609839105 0 -3,586 -100.00 0 -100.00
2018-08-13 2018-06-30 13F MONOLITHIC PWR SYS COM 609839105 3,586 0 0.00 415 0.00 0.0005
2018-05-14 2018-03-31 13F MONOLITHIC PWR SYS COM 609839105 3,586 3,586 0.00 415 0.00 0.0005
2017-11-13 2017-09-30 13F MONOLITHIC PWR SYS COM 609839105 0 -4,000 -100.00 0 -100.00
2017-08-11 2017-06-30 13F MONOLITHIC PWR SYS COM 609839105 4,000 -300 -6.98 386 -2.53 0.0005
2017-05-12 2017-03-31 13F MONOLITHIC PWR SYS COM 609839105 4,300 -52,800 -92.47 396 -91.53 0.0006
2017-02-13 2016-12-31 13F MONOLITHIC PWR SYS COM 609839105 57,100 -114,200 -66.67 4,678 -66.08 0.0074
2016-11-14 2016-09-30 13F MONOLITHIC PWR SYS COM 609839105 171,300 -177,586 -50.90 13,790 -42.15 0.0244
2016-08-12 2016-06-30 13F MONOLITHIC PWR SYS COM 609839105 348,886 -344,400 -49.68 23,836 -45.98 0.0454
2016-05-13 2016-03-31 13F MONOLITHIC PWR SYS COM 609839105 693,286 252,200 57.18 44,121 57.00 0.0839
2016-02-11 2015-12-31 13F MONOLITHIC PWR SYS COM 609839105 441,086 -8,314 -1.85 28,102 22.13 0.0612
2015-11-12 2015-09-30 13F MONOLITHIC PWR SYS COM 609839105 449,400 -3,100 -0.69 23,009 0.27 0.0549
2015-08-14 2015-06-30 13F MONOLITHIC PWR SYS COM 609839105 452,500 2,514 0.56 22,946 -3.15 0.0523
2015-05-13 2015-03-31 13F MONOLITHIC PWR SYS COM 609839105 449,986 16,900 3.90 23,692 9.98 0.0505
2015-02-13 2014-12-31 13F MONOLITHIC PWR SYS COM 609839105 433,086 30,100 7.47 21,542 21.35 0.0520
2014-11-12 2014-09-30 13F MONOLITHIC PWR SYS COM 609839105 402,986 -75,300 -15.74 17,752 -12.36 0.0486
2014-08-13 2014-06-30 13F MONOLITHIC PWR SYS COM 609839105 478,286 -43,200 -8.28 20,255 0.18 0.0472
2014-05-14 2014-03-31 13F MONOLITHIC PWR SYS COM 609839105 521,486 296,600 131.89 20,218 159.37 0.0485
2014-02-14 2013-12-31 13F MONOLITHIC PWR SYS COM 609839105 224,886 200,586 825.46 7,795 959.10 0.0187
2013-11-13 2013-09-30 13F MONOLITHIC PWR SYS COM 609839105 24,300 -3,700 -13.21 736 9.04 0.0018
2013-08-12 2013-06-30 13F MONOLITHIC PWR SYS COM 609839105 28,000 28,000 675 0.0018
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.