Monolithic Power Systems Inc

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Monolithic Power Systems Inc
TickerMPWR
CIK #0001280452
CUSIP609839105
SectorManufacturing - Semiconductors & Related Devices
Address6409 Guadalupe Mines Road, San Jose, CA 95120
Source [EDGAR]
CIK Filing 2011 - 2026
[0001280452] 10-K
[0001280452] 10-Q
[0001280452] 3
[0001280452] 4
[0001280452] 5
[0001280452] 8-K
[0001280452] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
Invesco Ltd Monolithic Power Systems Inc [2026-07-15] 0.0
Vanguard Capital Management LLC Monolithic Power Systems Inc [2026-04-30] 0.0
Vanguard Portfolio Management LLC Monolithic Power Systems Inc [2026-04-29] 0.0
Price T Rowe Associates Inc /MD/ Monolithic Power Systems Inc [2024-02-14] 4.6
FMR LLC Monolithic Power Systems Inc [2024-02-09] 0.0
Price T Rowe Associates Inc /MD/ Monolithic Power Systems Inc [2023-02-14] 7.8
BlackRock Inc Monolithic Power Systems Inc [2023-01-20] 11.6
Franklin Resources Inc Monolithic Power Systems Inc [2019-01-28] 5.3
RS Investment Management Co LLC Monolithic Power Systems Inc [2016-02-12] 5.35
Earnest Partners LLC Monolithic Power Systems Inc [2014-02-14] 5.5
Citadel Advisors LLC Monolithic Power Systems Inc [2013-12-27] 5.0
[2013-04-08] None
FMR LLC Monolithic Power Systems Inc [2012-09-10] 0.0
Janus Capital Management LLC Monolithic Power Systems Inc [2012-02-14] 6.0
Vanguard Group Inc Monolithic Power Systems Inc [2012-02-10] 5.27
Columbia Wanger Asset Management LLC Monolithic Power Systems Inc [2012-02-10] 6.2
Massachusetts Financial Services Co /MA/ Monolithic Power Systems Inc [2012-01-31] 5.4
Form 3/4/5 Filer 2011 - 2026
Monolithic Power Systems Inc
Sciammas Maurice
Tseng Saria
Dean Robert W II
Zhou Jeff
Hsing Michael
Xiao Deming
Elmiger Eugen J
Wynne Eileen
Lee Victor K
Blegen Theodore
Chang KUO Wei Herbert
Martinez Carintia
Moyer James C
Smith-Bogart Karen A
Rao Meera
McBurnie Douglas M
Ueunten Paul
Insider Transaction (Form 3/4/5) Date Action Shares Price Value ($)
Sciammas Maurice
Common Stock
2026-03-20 Sell 30 $1,095.07 32,852
Hsing Michael
Common Stock
2026-02-12 Sell 160 $1,188.23 190,117
Hsing Michael
Common Stock
2026-02-12 Sell 4,001 $1,164.92 4,660,845
Hsing Michael
Common Stock
2026-02-12 Sell 2,076 $1,168.80 2,426,429
Hsing Michael
Common Stock
2026-02-12 Sell 4,992 $1,159.84 5,789,921
Hsing Michael
Common Stock
2026-02-12 Sell 1,440 $1,217.12 1,752,653
Hsing Michael
Common Stock
2026-02-12 Sell 1,240 $1,210.11 1,500,536
Hsing Michael
Common Stock
2026-02-12 Sell 3,640 $1,205.82 4,389,185
Hsing Michael
Common Stock
2026-02-12 Sell 12,731 $1,155.71 14,713,344
Hsing Michael
Common Stock
2026-02-12 Sell 480 $1,180.79 566,779
Hsing Michael
Common Stock
2026-02-12 Sell 1,440 $1,200.81 1,729,166
Hsing Michael
Common Stock
2026-02-12 Sell 200 $1,173.39 234,678
Hsing Michael
Common Stock
2026-02-12 Sell 600 $1,194.34 716,604
Hsing Michael
Common Stock
2026-02-11 Sell 363 $1,158.71 420,612
Hsing Michael
Common Stock
2026-02-11 Sell 6,079 $1,192.67 7,250,241
Hsing Michael
Common Stock
2026-02-11 Sell 1,987 $1,172.92 2,330,592
Hsing Michael
Common Stock
2026-02-11 Sell 2,104 $1,188.17 2,499,910
Hsing Michael
Common Stock
2026-02-11 Sell 1,366 $1,163.71 1,589,628
Hsing Michael
Common Stock
2026-02-11 Sell 2,799 $1,177.67 3,296,298
Hsing Michael
Common Stock
2026-02-11 Sell 649 $1,202.28 780,280
showing 20 of 200 most recent transactions
13F Ownership Over TimeHoldersShares Held
2026-03-31 1,127 44,288,386
2025-12-31 1,069 45,795,470
2025-09-30 988 44,564,347
2025-06-30 911 43,486,356
2025-03-31 869 43,370,193
2024-12-31 866 44,425,382
2024-09-30 888 44,642,276
2024-06-30 841 45,188,736
2024-03-31 812 44,860,412
2023-12-31 739 44,351,567
2023-09-30 655 44,002,998
2023-06-30 655 43,561,236
Form 13F Holdings
Firm Period DFND Voting Shares
Vaughan Nelson Investment Management LP [2026-06-30] DFND 117,068 144,974
Congress Asset Management Co [2026-06-30] SOLE 69,827 80,425
Zevenbergen Capital Investments LLC [2026-06-30] SOLE 28,884 39,714
Zevenbergen Capital Investments LLC [2026-06-30] OTR 38,890 38,890
Swedbank AB [2026-06-30] DFND 27,002 27,002
Sapient Capital LLC [2026-06-30] SOLE 21,974 21,974
Park National Corp /OH/ [2026-06-30] SOLE 21,502 21,563
Y-Intercept Hong Kong Ltd [2026-06-30] SOLE 18,074 18,074
Czech National Bank [2026-06-30] SOLE 13,984 13,984
Commonwealth of Pennsylvania Public School Empls Retrmt SYS [2026-06-30] SOLE 10,851 10,851
Carderock Capital Management Inc [2026-06-30] SOLE 0 10,301
NorthCrest Asset Manangement LLC [2026-06-30] SOLE 8 10,135
PensionDanmark Pensionsforsikringsaktieselskab [2026-06-30] SOLE 0 8,820
Burney CO/ [2026-06-30] SOLE 0 8,383
Prevail Innovative Wealth Advisors LLC [2026-06-30] SOLE 0 6,401
ASR Vermogensbeheer NV [2026-06-30] DFND 6,303 6,303
Global X Japan Co Ltd [2026-06-30] SOLE 6,273 6,273
Louisiana State Employees Retirement System [2026-06-30] SOLE 5,700 5,700
Counterpoint Mutual Funds LLC [2026-06-30] SOLE 5,491 5,491
Avanza Fonder AB [2026-06-30] SOLE 5,190 5,190
Empirical Financial Services LLC DBA Empirical Wealth Ma [2026-06-30] SOLE 4,668 4,859
Yousif Capital Management LLC [2026-06-30] SOLE 1,218 4,599
QRG Capital Management Inc [2026-06-30] SOLE 4,590 4,590
Hennion & Walsh Asset Management Inc [2026-06-30] SOLE 4,348 4,348
Trilogy Capital Inc [2026-06-30] SOLE 0 3,781
Argent Capital Management LLC [2026-06-30] SOLE 3,507 3,507
Merit Financial Group LLC [2026-06-30] SOLE 11 3,250
Wealth Enhancement Advisory Services LLC [2026-06-30] SOLE 75 3,152
PFG Advisors [2026-06-30] SOLE 0 3,110
Snider Financial Group [2026-06-30] SOLE 0 2,932
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