MONOLITHIC POWER SYSTEMS INC (MPWR) Stock Ownership

NASDAQ:MPWR • US6098391054

1142.74 USD
-37.39 (-3.17%)
At close: Feb 27, 2026
1137.97 USD
-4.77 (-0.42%)
After Hours: 2/27/2026, 10:21:05 PM
Overview Stock Chart Technical Analysis Fundamental Analysis Analyst Ratings Earnings Estimates Financials Ownership News
MPWR Ownership Chart.MPWR Ownership Chart: showing Insider, Institutional ownership and shares available to the public.MPWR Ownership.InsiderInstitutional



Shares Outstanding48.71M
Float46.51M
Float Short Interest Percentage4.95%
Owners (insider)3.53%
Owners (institutional)101.59%
Owners (insider) change17.75%
Owners (institutional) change3.27%
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 Apr 2025 May 2025 Jun 2025 Jul 2025 Aug 2025 Sep 2025 Oct 2025 Nov 2025 Dec 2025 Jan 2026 Feb 2026 Mar 2026 0 200K -200K 400K
Date Name Type Shares Price Amount
Feb 12, 2026 Hsing Michael Open Market Sale 33000 1,171.83 $ 38,670,257.41
Feb 11, 2026 Hsing Michael Open Market Sale 33000 1,188.92 $ 39,234,211.79
Feb 11, 2026 Sciammas Maurice Open Market Sale 200 1,179.98 $ 235,995.00
Feb 10, 2026 Hsing Michael Open Market Sale 34000 1,142.28 $ 38,837,435.26
Feb 9, 2026 Lee Victor K Open Market Sale 400 1,212.16 $ 484,864.00
Feb 6, 2026 Xiao Deming Open Market Sale 22875 1,171.16 $ 26,790,369.64
Feb 6, 2026 Tseng Saria Open Market Sale 22875 1,171.16 $ 26,790,369.64
Feb 6, 2026 Sciammas Maurice Open Market Sale 22875 1,171.16 $ 26,790,369.64
Feb 6, 2026 Blegen Theodore Open Market Sale 21725 1,171.16 $ 25,443,531.38
Feb 6, 2026 Hsing Michael Open Market Sale 54923 1,171.16 $ 64,323,823.90
Feb 3, 2026 Hsing Michael Grant 136825 0.00 $ 0.00
Feb 3, 2026 Sciammas Maurice Grant 57170 0.00 $ 0.00
Feb 3, 2026 Tseng Saria Grant 57170 0.00 $ 0.00
Feb 3, 2026 Martinez Carintia Grant 189 0.00 $ 0.00
Feb 3, 2026 Xiao Deming Grant 57170 0.00 $ 0.00
Feb 3, 2026 Blegen Theodore Grant 38745 0.00 $ 0.00
Feb 3, 2026 Wynne Eileen Grant 189 0.00 $ 0.00
Feb 3, 2026 Zhou Jeff Grant 189 0.00 $ 0.00
Feb 3, 2026 CHANG KUO WEI HERBERT Grant 189 0.00 $ 0.00
Feb 3, 2026 Elmiger Eugen J Grant 189 0.00 $ 0.00
Feb 3, 2026 Lee Victor K Grant 189 0.00 $ 0.00
Feb 2, 2026 Blegen Theodore Open Market Sale 3000 1,129.76 $ 3,389,266.28
Jan 2, 2026 Blegen Theodore Open Market Sale 3000 940.47 $ 2,821,399.46
Jan 2, 2026 Lee Victor K Open Market Sale 600 930.86 $ 558,516.00
Dec 24, 2025 Lee Victor K Open Market Sale 1000 951.72 $ 951,719.21
Dec 24, 2025 Tseng Saria Other Disposition 2000 0.00 $ 0.00
Dec 9, 2025 Hsing Michael Other Disposition 12337 0.00 $ 0.00
Dec 1, 2025 Blegen Theodore Open Market Sale 3000 908.21 $ 2,724,623.44
Nov 26, 2025 Tseng Saria Open Market Sale 20000 926.47 $ 18,529,315.61
Nov 25, 2025 CHANG KUO WEI HERBERT Open Market Sale 100 896.97 $ 89,697.00
Nov 25, 2025 Tseng Saria Open Market Sale 20000 904.18 $ 18,083,638.33
Nov 24, 2025 Sciammas Maurice Open Market Sale 3976 895.23 $ 3,559,434.48
Nov 21, 2025 CHANG KUO WEI HERBERT Open Market Sale 100 873.97 $ 87,397.00
Nov 19, 2025 Sciammas Maurice Open Market Sale 27966 881.66 $ 24,656,386.86
Nov 19, 2025 Sciammas Maurice Open Market Sale 7034 870.21 $ 6,121,059.06
Nov 12, 2025 Hsing Michael Open Market Sale 37000 965.52 $ 35,724,379.66
Nov 11, 2025 Hsing Michael Open Market Sale 40000 958.39 $ 38,335,721.29
Nov 5, 2025 Sciammas Maurice Open Market Sale 200 986.81 $ 197,362.00
Nov 3, 2025 Blegen Theodore Open Market Sale 3000 1,024.43 $ 3,073,277.54
Oct 30, 2025 Blegen Theodore Option Excercise 48298 1,096.63 $ 52,965,035.74
Oct 30, 2025 Tseng Saria Option Excercise 54543 1,096.63 $ 59,813,490.09
Oct 30, 2025 Sciammas Maurice Option Excercise 54543 1,096.63 $ 59,813,490.09
Oct 30, 2025 Xiao Deming Option Excercise 54543 1,096.63 $ 59,813,490.09
Oct 30, 2025 Hsing Michael Option Excercise 121918 1,096.63 $ 133,698,936.34
Oct 25, 2025 Sciammas Maurice Grant 135520 0.00 $ 0.00
Oct 25, 2025 Tseng Saria Grant 135520 0.00 $ 0.00
Oct 25, 2025 Blegen Theodore Grant 87690 0.00 $ 0.00
Oct 25, 2025 Hsing Michael Grant 302920 0.00 $ 0.00
Oct 25, 2025 Xiao Deming Grant 135520 0.00 $ 0.00
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