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MONOLITHIC POWER SYSTEMS INC (MPWR) Stock Ownership and Short Interest

USA - NASDAQ:MPWR - US6098391054 - Common Stock

1086.36 USD
-18.69 (-1.69%)
Last: 10/28/2025, 5:46:37 PM
1089.99 USD
+3.63 (+0.33%)
After Hours: 10/28/2025, 5:46:37 PM
MPWR Ownership Chart.MPWR Ownership Chart: showing Insider, Institutional ownership and shares available to the public.MPWR Ownership.InsiderInstitutional



Shares Outstanding47.89M
Float46.32M
Float Short Interest Percentage4.06%
Owners (insider)3.03%
Owners (institutional)101.47%
Owners (insider) change-7.56%
Owners (institutional) change0.32%
MPWR Institutional Ownership HistoryMPWR Institutional Ownership HistoryMPWR Institutional Ownership History Sep 2021 Mar 2022 Sep 2022 Mar 2023 Sep 2023 Mar 2024 Sep 2024 Mar 2025 Sep 2025 10M 20M 30M 40M
MPWR Historical Insider Transactions ChartMPWR Historical Insider Buy and Sell Transactions ChartMPWR Historical Insider Transactions Nov 2024 Dec 2024 Jan 2025 Feb 2025 Mar 2025 Apr 2025 May 2025 Jun 2025 Jul 2025 Aug 2025 Sep 2025 Oct 2025 0 -10K -20K -30K -40K
Date Name Type Shares Price Amount
Oct 24, 2025 Tseng Saria Open Market Sale 1300 1,087.62 $ 1,413,906.00
Oct 15, 2025 Tseng Saria Open Market Sale 16840 1,017.77 $ 17,139,295.31
Oct 1, 2025 Blegen Theodore Open Market Sale 3000 913.22 $ 2,739,647.60
Sep 18, 2025 Tseng Saria Open Market Sale 14510 914.45 $ 13,268,669.50
Sep 18, 2025 Martinez Carintia Open Market Sale 1400 900.00 $ 1,260,000.00
Sep 2, 2025 Blegen Theodore Open Market Sale 3000 814.34 $ 2,443,032.12
Aug 29, 2025 Elmiger Eugen J Open Market Sale 4000 846.71 $ 3,386,841.00
Aug 27, 2025 Zhou Jeff Open Market Sale 193 870.00 $ 167,910.00
Aug 19, 2025 Sciammas Maurice Other Disposition 3998 0.00 $ 0.00
Aug 15, 2025 Hsing Michael Open Market Sale 20231 829.10 $ 16,773,550.18
Aug 13, 2025 Zhou Jeff Open Market Sale 400 850.00 $ 340,000.00
Aug 12, 2025 Zhou Jeff Open Market Sale 200 830.00 $ 166,000.00
Aug 11, 2025 Xiao Deming Other Aquisition 1890 0.00 $ 0.00
Aug 6, 2025 Sciammas Maurice Other Aquisition 9672 0.00 $ 0.00
Aug 1, 2025 Blegen Theodore Open Market Sale 3000 750.00 $ 2,250,000.00
Aug 1, 2025 Xiao Deming Open Market Sale 39999 780.00 $ 31,199,220.00
Jul 1, 2025 Blegen Theodore Open Market Sale 6000 750.00 $ 4,500,000.00
May 28, 2025 Sciammas Maurice Other Disposition 2998 0.00 $ 0.00
May 13, 2025 CHANG KUO WEI HERBERT Open Market Sale 50 738.00 $ 36,900.00
May 12, 2025 Sciammas Maurice Open Market Sale 12000 701.00 $ 8,412,000.00
May 12, 2025 CHANG KUO WEI HERBERT Open Market Sale 100 698.00 $ 69,800.00
May 8, 2025 CHANG KUO WEI HERBERT Open Market Sale 100 650.00 $ 65,000.00
Feb 18, 2025 Sciammas Maurice Other Disposition 2204 0.00 $ 0.00
Feb 18, 2025 Hsing Michael Open Market Sale 5200 700.00 $ 3,640,000.00
Feb 11, 2025 Sciammas Maurice Other Disposition 10100 0.00 $ 0.00
Feb 10, 2025 Sciammas Maurice Open Market Sale 662 717.10 $ 474,720.60
Feb 10, 2025 Hsing Michael Open Market Sale 2594 717.10 $ 1,860,157.40
Feb 10, 2025 Blegen Theodore Open Market Sale 532 717.10 $ 381,497.57
Feb 10, 2025 Xiao Deming Open Market Sale 662 717.10 $ 474,720.60
Feb 10, 2025 Tseng Saria Open Market Sale 663 717.10 $ 475,437.57
Feb 7, 2025 Hsing Michael Open Market Sale 11964 700.00 $ 8,374,800.00
Feb 7, 2025 Sciammas Maurice Open Market Sale 7000 701.98 $ 4,913,851.67
Feb 4, 2025 Lee Victor K Grant 335 0.00 $ 0.00
Feb 4, 2025 Elmiger Eugen J Grant 335 0.00 $ 0.00
Feb 4, 2025 CHANG KUO WEI HERBERT Grant 335 0.00 $ 0.00
Feb 4, 2025 Martinez Carintia Grant 335 0.00 $ 0.00
Feb 4, 2025 Zhou Jeff Grant 335 0.00 $ 0.00
Feb 4, 2025 Wynne Eileen Grant 335 0.00 $ 0.00
Jan 24, 2025 Hsing Michael Open Market Sale 3636 700.00 $ 2,545,200.00
Dec 9, 2024 Blegen Theodore Open Market Sale 2500 600.00 $ 1,500,000.00
Nov 8, 2024 Xiao Deming Open Market Sale 866 765.14 $ 662,611.24
Nov 8, 2024 Tseng Saria Open Market Sale 866 765.14 $ 662,611.24
Nov 8, 2024 Sciammas Maurice Open Market Sale 866 765.14 $ 662,611.24
Nov 8, 2024 Hsing Michael Open Market Sale 2812 765.15 $ 2,151,601.80
Nov 8, 2024 Blegen Theodore Open Market Sale 734 765.15 $ 561,620.10
Nov 1, 2024 Blegen Theodore Open Market Sale 2500 772.96 $ 1,932,404.67