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MONOLITHIC POWER SYSTEMS, INC. insider trading

MPWRNASDAQ
$1,439.73+78.76 (+5.79%)as of Oct 2, 2026

“Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise.” — Peter Lynch

Insider Trading vs Stock Price

Insider Trading vs Stock Price data

Showing the 1Y range: Oct 2, 2025 to Oct 2, 2026. Price (+54.7%). 0 insider transactions plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
DateCategoryPersonRoleActionAmountChange in holding
Open market purchase
Open market sell
Marker size reflects transaction size.

Net dollar flow · Buy / Sell balance

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Q2 '25Q3 '25Q4 '25Q1 '26Q2 '26Q3 '26
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Key players

  • MHMichael HsingCEO1.9619%of company
  • MSMaurice SciammasEVP, WW Sales & Marketing0.4771%of company
  • DXDeming XiaoEVP, Global Operations0.4695%of company
  • STSaria TsengEVP & General Counsel0.2955%of company
  • TBTheodore BlegenEVP and CFO0.1893%of company
  • VKVictor K. LeeDirector0.0565%of company
  • RWRobert W. Dean IIInterim CFO0.0146%of company
  • EJEugen J. ElmigerDirector0.011%of company
  • JZJeff ZhouDirector0.0077%of company
  • CMCarintia MartinezDirector0.0022%of company

AI Activity Analysis

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Insider activity

Fromto
CompanyInsider / roleActionΔOwnAvg priceAmount
MPWRMichael HsingCEOOpen market sell$176K0.0%$1,356.94$176KSep 28, 2026Sep 30, 2026
MPWRMichael HsingCEOOpen market sell$14.8M-1.1%$1,351.43$14.8MSep 28, 2026Sep 30, 2026
MPWRMichael HsingCEOOpen market sell$8.54M-0.7%$1,347.15$8.54MSep 28, 2026Sep 30, 2026
MPWRMichael HsingCEOOpen market sell$7.77M-0.6%$1,343.76$7.77MSep 28, 2026Sep 30, 2026
MPWRMichael HsingCEOOpen market sell$3.95M-0.3%$1,338.66$3.95MSep 28, 2026Sep 30, 2026
MPWRMichael HsingCEOOpen market sell$1.48M-0.1%$1,333.34$1.48MSep 28, 2026Sep 30, 2026
MPWRMichael HsingCEOOpen market sell$2.82M-0.2%$1,328.54$2.82MSep 28, 2026Sep 30, 2026
MPWRMichael HsingCEOOpen market sell$789K-0.1%$1,323.31$789KSep 28, 2026Sep 30, 2026
MPWRRobert W. Dean IIInterim CFOOpen market sell$41.5K-0.5%$1,297.72$41.5KAug 24, 2026Aug 26, 2026
MPWRKuo Wei Herbert ChangDirectorOpen market sell$64.1K-8.9%$1,281.57$64.1KAug 24, 2026Aug 25, 2026
MPWRRobert W. Dean IIInterim CFOOpen market sell$8.48K-0.1%$1,413.64$8.48KAug 17, 2026Aug 19, 2026
MPWRKuo Wei Herbert ChangDirectorOpen market sell$71K-8.1%$1,420.00$71KAug 11, 2026Aug 13, 2026
MPWRRobert W. Dean IIInterim CFOOpen market sell$141K-1.4%$1,344.27$141KAug 5, 2026Aug 6, 2026
MPWRMaurice SciammasEVP, WW Sales & MarketingOpen market sell$40.3K0.0%$1,343.94$40.3KAug 3, 2026Aug 5, 2026
MPWRMaurice SciammasEVP, WW Sales & MarketingOpen market sell$155K-0.1%$1,405.71$155KJul 15, 2026Jul 17, 2026
MPWRMaurice SciammasEVP, WW Sales & MarketingOpen market sell$164K-0.1%$1,400.45$164KJul 15, 2026Jul 17, 2026
MPWRMaurice SciammasEVP, WW Sales & MarketingOpen market sell$297K-0.1%$1,396.16$297KJul 15, 2026Jul 17, 2026
MPWRMaurice SciammasEVP, WW Sales & MarketingOpen market sell$69.4K0.0%$1,388.19$69.4KJul 15, 2026Jul 17, 2026
MPWRMaurice SciammasEVP, WW Sales & MarketingOpen market sell$567K-0.2%$1,384.11$567KJul 15, 2026Jul 17, 2026
MPWRMaurice SciammasEVP, WW Sales & MarketingOpen market sell$576K-0.2%$1,378.73$576KJul 15, 2026Jul 17, 2026
MPWRMaurice SciammasEVP, WW Sales & MarketingOpen market sell$649K-0.2%$1,375.47$649KJul 15, 2026Jul 17, 2026
MPWRMaurice SciammasEVP, WW Sales & MarketingOpen market sell$329K-0.1%$1,369.18$329KJul 15, 2026Jul 17, 2026
MPWRMaurice SciammasEVP, WW Sales & MarketingOpen market sell$68K0.0%$1,359.36$68KJul 15, 2026Jul 17, 2026
MPWRMaurice SciammasEVP, WW Sales & MarketingOpen market sell$7.63M-2.3%$1,352.95$7.63MJul 15, 2026Jul 17, 2026
MPWRMaurice SciammasEVP, WW Sales & MarketingOpen market sell$2.03M-0.6%$1,348.91$2.03MJul 15, 2026Jul 17, 2026
MPWRMaurice SciammasEVP, WW Sales & MarketingOpen market sell$2.51M-0.8%$1,344.16$2.51MJul 15, 2026Jul 17, 2026
MPWRMaurice SciammasEVP, WW Sales & MarketingOpen market sell$1.96M-0.6%$1,339.59$1.96MJul 15, 2026Jul 17, 2026
MPWRMaurice SciammasEVP, WW Sales & MarketingOpen market sell$1.04M-0.3%$1,334.59$1.04MJul 15, 2026Jul 17, 2026
MPWRMaurice SciammasEVP, WW Sales & MarketingOpen market sell$617K-0.2%$1,329.30$617KJul 15, 2026Jul 17, 2026
MPWRMaurice SciammasEVP, WW Sales & MarketingOpen market sell$541K-0.2%$1,323.93$541KJul 15, 2026Jul 17, 2026
MPWRMaurice SciammasEVP, WW Sales & MarketingOpen market sell$361K-0.1%$1,318.42$361KJul 15, 2026Jul 17, 2026
MPWRMaurice SciammasEVP, WW Sales & MarketingOpen market sell$692K-0.2%$1,314.03$692KJul 15, 2026Jul 17, 2026
MPWRMaurice SciammasEVP, WW Sales & MarketingOpen market sell$40.5K0.0%$1,351.61$40.5KJul 1, 2026Jul 6, 2026
MPWRMaurice SciammasEVP, WW Sales & MarketingOpen market sell$46K0.0%$1,533.95$46KJun 1, 2026Jun 3, 2026
MPWRSaria TsengEVP & General CounselOpen market sell$12.9M-5.0%$1,700.00$12.9MMay 27, 2026May 29, 2026
MPWRRobert W. Dean IIInterim CFOOpen market sell$36.3K-0.4%$1,649.56$36.3KMay 26, 2026May 28, 2026
MPWRJeff ZhouDirectorOpen market sell$816K-11.3%$1,680.00$816KMay 26, 2026May 27, 2026
MPWRSaria TsengEVP & General CounselOpen market sell$7.93M-3.2%$1,586.43$7.93MMay 22, 2026May 27, 2026
MPWRMichael HsingCEOOpen market sell$198K0.0%$1,521.43$198KMay 18, 2026May 20, 2026
MPWRMichael HsingCEOOpen market sell$534K0.0%$1,518.15$534KMay 18, 2026May 20, 2026
MPWRMichael HsingCEOOpen market sell$834K-0.1%$1,513.11$834KMay 18, 2026May 20, 2026
MPWRMichael HsingCEOOpen market sell$5.68M-0.4%$1,507.70$5.68MMay 18, 2026May 20, 2026
MPWRMichael HsingCEOOpen market sell$4.4M-0.3%$1,503.05$4.4MMay 18, 2026May 20, 2026
MPWRMichael HsingCEOOpen market sell$912K-0.1%$1,499.46$912KMay 18, 2026May 20, 2026
MPWRMichael HsingCEOOpen market sell$1.29M-0.1%$1,491.48$1.29MMay 18, 2026May 20, 2026
MPWRMichael HsingCEOOpen market sell$9.94M-0.7%$1,486.76$9.94MMay 18, 2026May 20, 2026
MPWRMichael HsingCEOOpen market sell$8.51M-0.6%$1,482.51$8.51MMay 18, 2026May 20, 2026
MPWRMichael HsingCEOOpen market sell$6.03M-0.4%$1,476.96$6.03MMay 18, 2026May 20, 2026
MPWRMichael HsingCEOOpen market sell$7.44M-0.5%$1,472.84$7.44MMay 18, 2026May 20, 2026
MPWRMichael HsingCEOOpen market sell$8.54M-0.6%$1,467.62$8.54MMay 18, 2026May 20, 2026
50 of 317 transactions
SpoorBase

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