Monolithic Power Systems (MPWR) Insider Trading & Ownership $731.84 +25.56 (+3.62%) Closing price 04:00 PM EasternExtended Trading$731.00 -0.84 (-0.11%) As of 07:57 PM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more. Add Compare Share Share Insider Trades Stock AnalysisAnalyst ForecastsChartCompetitorsDividendEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Monolithic Power Systems (NASDAQ:MPWR) Insider Buying and Selling ActivityCurrentInsider OwnershipPercentage3.40%Number OfInsiders Buying(Last 12 Months)0Number OfInsiders Selling(Last 12 Months)7Amount OfInsider Selling(Last 12 Months)$113.75M Get MPWR Insider Trade Alerts Want to know when executives and insiders are buying or selling Monolithic Power Systems stock? 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Email Address MPWR Insider Buying and Selling by Quarter Monolithic Power Systems Insider and Congressional Trades History Insiders and Members of Congress Insiders Only Members of Congress Only Transaction Type Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 2 Years 3 Years Time Frame * Start Date * End Date Export to Excel Transaction DateNameTitleBuy/SellNumber of SharesAverage Share PriceTotal TransactionDetails5/12/2025Kuo Wei Herbert ChangDirectorSell100$698.00$69,800.00 5/12/2025Maurice SciammasEVPSell12,000$701.00$8,412,000.00 5/8/2025Kuo Wei Herbert ChangDirectorSell100$650.00$65,000.00 4/23/2025Ro KhannaU.S. Congress Member (D-CA)Sell$536.97$1,001 - $15,0004/8/2025Robert Bresnahan, Jr.U.S. Congress Member (R-PA)Buy$455.19$1,001 - $15,0002/7/2025Maurice SciammasEVPSell7,000$701.98$4,913,860.00 1/13/2025Robert Bresnahan, Jr.U.S. Congress Member (R-PA)Sell$587.35$1,001 - $15,00012/9/2024Theodore BlegenCFOSell2,500$600.00$1,500,000.00 11/8/2024Deming XiaoEVPSell866$765.14$662,611.24 11/8/2024Theodore BlegenCFOSell734$765.15$561,620.10 11/1/2024Theodore BlegenCFOSell2,500$772.96$1,932,400.00 10/7/2024Maurice SciammasEVPSell11,000$929.59$10,225,490.00 10/1/2024Theodore BlegenCFOSell2,500$908.36$2,270,900.00 Get Insider Trades Delivered To Your InboxEnter your email address below to receive a concise daily summary of insider buying activity, insider selling activity and changes in hedge fund holdings. 9/3/2024Theodore BlegenCFOSell2,500$904.20$2,260,500.00 8/27/2024Deming XiaoEVPSell9,259$950.00$8,796,050.00 8/22/2024Deming XiaoEVPSell10,000$950.00$9,500,000.00 8/8/2024Deming XiaoEVPSell859$778.39$668,637.01 8/8/2024Michael HsingCEOSell2,790$778.39$2,171,708.10 8/8/2024Theodore BlegenCFOSell728$778.39$566,667.92 8/1/2024Theodore BlegenCFOSell2,500$852.51$2,131,275.00 7/22/2024Deming XiaoEVPSell3,205$831.58$2,665,213.90 7/22/2024Michael HsingCEOSell9,614$831.58$7,994,810.12 7/22/2024Theodore BlegenCFOSell2,580$831.58$2,145,476.40 7/8/2024Maurice SciammasEVPSell10,999$843.83$9,281,286.17 7/1/2024Michael HsingCEOSell2,672$804.57$2,149,811.04 7/1/2024Saria TsengEVPSell37,093$808.20$29,978,562.60 7/1/2024Theodore BlegenCFOSell2,500$804.19$2,010,475.00 6/28/2024Victor K LeeDirectorSell1,000$820.46$820,460.00 (Data available from 1/1/2013 forward) MPWR Insider Trading Activity - Frequently Asked Questions Who is on Monolithic Power Systems's Insider Roster? The list of insiders at Monolithic Power Systems includes Deming Xiao, James C Moyer, Jeff Zhou, Kuo Wei Herbert Chang, Maurice Sciammas, Michael Hsing, Saria Tseng, Theodore Blegen, and Victor K Lee. Learn more on insiders at MPWR. What percentage of Monolithic Power Systems stock is owned by insiders? 3.40% of Monolithic Power Systems stock is owned by insiders. Learn more on MPWR's insider holdings. Which Monolithic Power Systems insiders have been selling company stock? The following insiders have sold MPWR shares in the last 24 months: Deming Xiao ($38,599,072.24), James C Moyer ($2,047,972.00), Jeff Zhou ($300,114.00), Kuo Wei Herbert Chang ($946,885.00), Maurice Sciammas ($54,852,075.81), Michael Hsing ($110,629,195.93), Saria Tseng ($57,859,997.70), Theodore Blegen ($48,898,131.76), and Victor K Lee ($820,460.00). How much insider selling is happening at Monolithic Power Systems? Insiders have sold a total of 481,505 Monolithic Power Systems shares in the last 24 months for a total of $314,953,904.44 sold. Which members of congress are trading Monolithic Power Systems? Robert Bresnahan, Jr. (R-PA) has bought shares of Monolithic Power Systems in the last year totaling $8,000. Ro Khanna (D-CA) and Robert Bresnahan, Jr. (R-PA) have sold shares totaling $16,000. Monolithic Power Systems Key ExecutivesMr. Michael R. Hsing (Age 64)Founder, Chairman, President & CEO Compensation: $2.33MMr. Theodore Bernie Blegen (Age 66)Executive VP & CFO Compensation: $1.13MMr. Deming Xiao (Age 61)Executive Vice President of Global Operations Compensation: $1.23MMs. Saria Tseng (Age 53)EVP of Strategic Corporate Development, General Counsel & Corporate Secretary Compensation: $1.23MMr. Maurice Sciammas (Age 64)Executive Vice President of Worldwide Sales & Marketing Compensation: $1.23M2 recent tradesMs. Genevieve CunninghamSenior Manager of Marketing Communications More Insider Trading Tools from MarketBeat Related Companies MU Insider Trading ADI Insider Trading INTC Insider Trading MRVL Insider Trading MCHP Insider Trading FSLR Insider Trading SWKS Insider Trading ALTR Insider Trading MTSI Insider Trading LSCC Insider Trading Insider Tracking Tools CEO Purchases/Sales CFO Purchases/Sales Top Insider Buying Stocks Top Insider Selling Stocks Insider Trades Screener Insider Trades Newsletter Congressional Stock Trades Insider Trading By Country U.S. Insider Trading Activity Canadian Insider Trading Activity U.K. Insider Trading Activity Australia Insider Trading Activity Latest Articles 3 Tightly-Held Growth Stocks Set Up for Short SqueezesTankers, Takedowns & Air Taxis: Insiders Are Buying These 3 Names3 Tech Stocks Insiders Are Buying: Speculative Plays for JuneDividend Investors Looking for an Edge? 3 Stocks Insiders BoughtMeta's Institutional & Insider Data Fuels Bulls Despite Disparity This page (NASDAQ:MPWR) was last updated on 6/10/2025 by MarketBeat.com Staff From Our PartnersBanks aren’t ready for this altcoin—are you?While everyone's distracted by Bitcoin's moves, a stealth revolution is underway. 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