MetaCap

Monolithic Power Systems Insider Trades

NASDAQ: MPWRTechnologySemiconductorsUSD

1,369.80-56.18 (-3.94%)

At close: Oct 8, 4:00 PM ET · Delayed 15 min

After hours: 1,369.80 0.00%

Last 12 months

Purchases
0 · $0
Sales
89 · $244.72M
Shares bought / sold
0 / 163.63K
Net activity
Net selling $244.7 million

Monolithic Power Systems insider activity

Over the last 12 months, Monolithic Power Systems insiders reported 100 transactions on SEC Form 4: 0 open-market purchases and 89 sales. Insiders bought $0 and sold $244.7 million worth of stock, for net insider selling of $244.7 million. The largest seller was Hsing Michael, with $99.7 million in reported sales.

The most recent filing shows Hsing Michael (CEO) selling 596 shares at $1,323.31 on Sep 28, 2026. Insider sales are common for compensation, tax and diversification reasons, while open-market purchases are rarer; tracking both helps put MPWR's ownership changes in context.

Summary generated from market data by MetaCap's automated system. Methodology

MPWR insider transactions

Monolithic Power Systems insider transactions
DateInsiderTypeSharesValueFiling
Sep 28, 2026Hsing MichaelCEOSale130$176.40KForm 4
Sep 28, 2026Hsing MichaelCEOSale10,967$14.82MForm 4
Sep 28, 2026Hsing MichaelCEOSale6,343$8.54MForm 4
Sep 28, 2026Hsing MichaelCEOSale5,783$7.77MForm 4
Sep 28, 2026Hsing MichaelCEOSale2,949$3.95MForm 4
Sep 28, 2026Hsing MichaelCEOSale1,111$1.48MForm 4
Sep 28, 2026Hsing MichaelCEOSale2,121$2.82MForm 4
Sep 28, 2026Hsing MichaelCEOSale596$788.69KForm 4
Aug 31, 2026Tseng SariaEVP & General CounselGift2,000—Form 4
Aug 31, 2026Tseng SariaEVP & General CounselGift2,000—Form 4
Aug 24, 2026CHANG KUO WEI HERBERTDirectorSale50$64.08KForm 4
Aug 24, 2026DEAN ROBERT W IIInterim CFOother5—Form 4
Aug 24, 2026DEAN ROBERT W IIInterim CFOSale32$41.53KForm 4
Aug 17, 2026DEAN ROBERT W IIInterim CFOSale6$8.48KForm 4
Aug 11, 2026CHANG KUO WEI HERBERTDirectorSale50$71.00KForm 4
Aug 5, 2026DEAN ROBERT W IIInterim CFOSale105$141.15KForm 4
Aug 4, 2026Sciammas MauriceEVP, WW Sales & MarketingGift25,000—Form 4
Aug 4, 2026Sciammas MauriceEVP, WW Sales & MarketingGift25,000—Form 4
Aug 3, 2026Sciammas MauriceEVP, WW Sales & MarketingSale30$40.32KForm 4
Jul 25, 2026DEAN ROBERT W IIInterim CFOAward1,359—Form 4
Jul 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale110$154.63KForm 4
Jul 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale117$163.85KForm 4
Jul 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale213$297.38KForm 4
Jul 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale50$69.41KForm 4
Jul 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale410$567.49KForm 4
Jul 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale418$576.31KForm 4
Jul 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale472$649.22KForm 4
Jul 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale240$328.60KForm 4
Jul 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale50$67.97KForm 4
Jul 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale5,640$7.63MForm 4
Jul 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale1,506$2.03MForm 4
Jul 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale1,864$2.51MForm 4
Jul 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale1,460$1.96MForm 4
Jul 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale776$1.04MForm 4
Jul 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale464$616.80KForm 4
Jul 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale409$541.49KForm 4
Jul 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale274$361.25KForm 4
Jul 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale527$692.49KForm 4
Jul 1, 2026Sciammas MauriceEVP, WW Sales & MarketingSale30$40.55KForm 4
Jun 1, 2026Sciammas MauriceEVP, WW Sales & MarketingSale30$46.02KForm 4
May 29, 2026Sciammas MauriceEVP, WW Sales & MarketingGift12,472—Form 4
May 27, 2026Tseng SariaEVP & General CounselSale7,565$12.86MForm 4
May 26, 2026Zhou JeffDirectorSale486$816.48KForm 4
May 26, 2026DEAN ROBERT W IIInterim CFOSale22$36.29KForm 4
May 22, 2026Tseng SariaEVP & General CounselSale5,000$7.93MForm 4
May 22, 2026Tseng SariaEVP & General CounselGift200—Form 4
May 18, 2026Hsing MichaelCEOSale130$197.79KForm 4
May 18, 2026Hsing MichaelCEOSale352$534.39KForm 4
May 18, 2026Hsing MichaelCEOSale551$833.72KForm 4
May 18, 2026Hsing MichaelCEOSale3,769$5.68MForm 4
May 18, 2026Hsing MichaelCEOSale2,929$4.40MForm 4
May 18, 2026Hsing MichaelCEOSale608$911.67KForm 4
May 18, 2026Hsing MichaelCEOSale862$1.29MForm 4
May 18, 2026Hsing MichaelCEOSale6,688$9.94MForm 4
May 18, 2026Hsing MichaelCEOSale5,737$8.51MForm 4
May 18, 2026Hsing MichaelCEOSale4,082$6.03MForm 4
May 18, 2026Hsing MichaelCEOSale5,049$7.44MForm 4
May 18, 2026Hsing MichaelCEOSale5,819$8.54MForm 4
May 18, 2026Hsing MichaelCEOSale3,424$5.01MForm 4
May 18, 2026DEAN ROBERT W IIInterim CFOSale4$6.25KForm 4
May 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale50$79.28KForm 4
May 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale447$707.25KForm 4
May 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale703$1.11MForm 4
May 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale1,312$2.06MForm 4
May 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale2,020$3.17MForm 4
May 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale2,010$3.14MForm 4
May 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale1,717$2.67MForm 4
May 15, 2026Sciammas MauriceEVP, WW Sales & MarketingSale3,741$5.80MForm 4
May 13, 2026DEAN ROBERT W IIInterim CFOother2,156—Form 4
May 13, 2026Sciammas MauriceEVP, WW Sales & MarketingGift1,563—Form 4
May 13, 2026Sciammas MauriceEVP, WW Sales & MarketingGift1,563—Form 4
May 6, 2026Zhou JeffDirectorSale500$825.00KForm 4
May 6, 2026Wynne EileenDirectorSale335$530.20KForm 4
May 6, 2026Xiao DemingEVP, Global OperationsSale907$1.51MForm 4
May 6, 2026Xiao DemingEVP, Global OperationsSale11,597$19.23MForm 4
May 6, 2026Xiao DemingEVP, Global OperationsSale14,167$23.42MForm 4
May 6, 2026Xiao DemingEVP, Global OperationsSale3,329$5.49MForm 4
May 6, 2026Elmiger Eugen JDirectorSale514$822.47KForm 4
May 6, 2026Elmiger Eugen JDirectorSale2,619$4.18MForm 4
May 6, 2026Elmiger Eugen JDirectorSale1,355$2.16MForm 4
May 6, 2026Elmiger Eugen JDirectorSale2,587$4.11MForm 4
May 6, 2026Elmiger Eugen JDirectorSale1,879$2.97MForm 4
May 6, 2026Elmiger Eugen JDirectorSale834$1.31MForm 4
May 6, 2026Elmiger Eugen JDirectorSale1,078$1.69MForm 4
May 6, 2026Elmiger Eugen JDirectorSale814$1.28MForm 4
May 6, 2026Elmiger Eugen JDirectorSale320$499.16KForm 4
May 5, 2026Sciammas MauriceEVP, WW Sales & MarketingSale380$601.85KForm 4
May 5, 2026Zhou JeffDirectorSale500$800.00KForm 4
May 5, 2026Zhou JeffDirectorSale514$809.28KForm 4
May 4, 2026Sciammas MauriceEVP, WW Sales & MarketingSale30$47.66KForm 4
Apr 8, 2026Tseng SariaEVP & General CounselSale120$158.63KForm 4
Apr 8, 2026Tseng SariaEVP & General CounselSale840$1.11MForm 4
Apr 8, 2026Tseng SariaEVP & General CounselSale4,244$5.57MForm 4
Apr 8, 2026Tseng SariaEVP & General CounselSale1,279$1.67MForm 4
Apr 8, 2026Tseng SariaEVP & General CounselSale800$1.04MForm 4
Apr 8, 2026Tseng SariaEVP & General CounselSale400$516.83KForm 4
Apr 8, 2026Tseng SariaEVP & General CounselSale120$154.45KForm 4
Apr 8, 2026Tseng SariaEVP & General CounselSale240$307.09KForm 4
Apr 8, 2026Tseng SariaEVP & General CounselSale360$457.30KForm 4
Apr 8, 2026Tseng SariaEVP & General CounselSale560$709.23KForm 4

Transaction codes follow SEC Form 4: P = open-market purchase, S = open-market sale, A = grant or award, M = option exercise, F = shares withheld for taxes. About Form 4

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