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Monolithic Power Systems, Inc. insider trading

In the last twelve months insiders at Monolithic Power Systems, Inc. filed 181 open-market sales worth $536.2 million and 0 open-market purchases, on Form 4 with the SEC. The latest: Dean Robert W Ii, Interim CFO, sold 32 shares at $1,297.72 on 24 August 2026, filed 26 August 2026.

TradedInsiderRoleTypeSharesPriceValueFiling
24 August 2026Dean Robert W IiInterim CFOSale32$1,297.72$41,527Form 4
24 August 2026Chang Kuo Wei HerbertDirectorSale50$1,281.57$64,078Form 4
17 August 2026Dean Robert W IiInterim CFOSale6$1,413.64$8,482Form 4
11 August 2026Chang Kuo Wei HerbertDirectorSale50$1,420.00$71,000Form 4
5 August 2026Dean Robert W IiInterim CFOSale105$1,344.27$141,148Form 4
3 August 2026Sciammas MauriceEVP, WW Sales & MarketingSale30$1,343.94$40,318Form 4
15 July 2026Sciammas MauriceEVP, WW Sales & MarketingSale527$1,314.03$692,494Form 4
15 July 2026Sciammas MauriceEVP, WW Sales & MarketingSale274$1,318.42$361,247Form 4
15 July 2026Sciammas MauriceEVP, WW Sales & MarketingSale409$1,323.93$541,487Form 4
15 July 2026Sciammas MauriceEVP, WW Sales & MarketingSale464$1,329.30$616,795Form 4
15 July 2026Sciammas MauriceEVP, WW Sales & MarketingSale776$1,334.59$1.0 millionForm 4
15 July 2026Sciammas MauriceEVP, WW Sales & MarketingSale1,460$1,339.59$2.0 millionForm 4
15 July 2026Sciammas MauriceEVP, WW Sales & MarketingSale1,864$1,344.16$2.5 millionForm 4
15 July 2026Sciammas MauriceEVP, WW Sales & MarketingSale1,506$1,348.91$2.0 millionForm 4
15 July 2026Sciammas MauriceEVP, WW Sales & MarketingSale5,640$1,352.95$7.6 millionForm 4
15 July 2026Sciammas MauriceEVP, WW Sales & MarketingSale50$1,359.36$67,968Form 4
15 July 2026Sciammas MauriceEVP, WW Sales & MarketingSale240$1,369.18$328,603Form 4
15 July 2026Sciammas MauriceEVP, WW Sales & MarketingSale472$1,375.47$649,222Form 4
15 July 2026Sciammas MauriceEVP, WW Sales & MarketingSale418$1,378.73$576,309Form 4
15 July 2026Sciammas MauriceEVP, WW Sales & MarketingSale410$1,384.11$567,485Form 4
15 July 2026Sciammas MauriceEVP, WW Sales & MarketingSale50$1,388.19$69,410Form 4
15 July 2026Sciammas MauriceEVP, WW Sales & MarketingSale213$1,396.16$297,382Form 4
15 July 2026Sciammas MauriceEVP, WW Sales & MarketingSale117$1,400.45$163,853Form 4
15 July 2026Sciammas MauriceEVP, WW Sales & MarketingSale110$1,405.71$154,628Form 4
1 July 2026Sciammas MauriceEVP, WW Sales & MarketingSale30$1,351.61$40,548Form 4
1 June 2026Sciammas MauriceEVP, WW Sales & MarketingSale30$1,533.95$46,018Form 4
27 May 2026Tseng SariaEVP & General CounselSale7,565$1,700.00$12.9 millionForm 4
26 May 2026Dean Robert W IiInterim CFOSale22$1,649.56$36,290Form 4
26 May 2026Zhou JeffDirectorSale486$1,680.00$816,480Form 4
22 May 2026Tseng SariaEVP & General CounselSale5,000$1,586.43$7.9 millionForm 4
18 May 2026Hsing MichaelCEOSale3,424$1,462.61$5.0 millionForm 4
18 May 2026Hsing MichaelCEOSale5,819$1,467.62$8.5 millionForm 4
18 May 2026Hsing MichaelCEOSale5,049$1,472.84$7.4 millionForm 4
18 May 2026Hsing MichaelCEOSale4,082$1,476.96$6.0 millionForm 4
18 May 2026Hsing MichaelCEOSale5,737$1,482.51$8.5 millionForm 4
18 May 2026Hsing MichaelCEOSale6,688$1,486.76$9.9 millionForm 4
18 May 2026Hsing MichaelCEOSale862$1,491.48$1.3 millionForm 4
18 May 2026Hsing MichaelCEOSale608$1,499.46$911,672Form 4
18 May 2026Hsing MichaelCEOSale2,929$1,503.05$4.4 millionForm 4
18 May 2026Hsing MichaelCEOSale3,769$1,507.70$5.7 millionForm 4
18 May 2026Hsing MichaelCEOSale551$1,513.11$833,724Form 4
18 May 2026Hsing MichaelCEOSale352$1,518.15$534,389Form 4
18 May 2026Hsing MichaelCEOSale130$1,521.43$197,786Form 4
18 May 2026Dean Robert W IiInterim CFOSale4$1,563.28$6,253Form 4
15 May 2026Sciammas MauriceEVP, WW Sales & MarketingSale3,741$1,550.36$5.8 millionForm 4
15 May 2026Sciammas MauriceEVP, WW Sales & MarketingSale1,717$1,557.48$2.7 millionForm 4
15 May 2026Sciammas MauriceEVP, WW Sales & MarketingSale2,010$1,562.01$3.1 millionForm 4
15 May 2026Sciammas MauriceEVP, WW Sales & MarketingSale2,020$1,567.15$3.2 millionForm 4
15 May 2026Sciammas MauriceEVP, WW Sales & MarketingSale1,312$1,571.49$2.1 millionForm 4
15 May 2026Sciammas MauriceEVP, WW Sales & MarketingSale703$1,577.75$1.1 millionForm 4
15 May 2026Sciammas MauriceEVP, WW Sales & MarketingSale447$1,582.21$707,248Form 4
15 May 2026Sciammas MauriceEVP, WW Sales & MarketingSale50$1,585.51$79,276Form 4
6 May 2026Elmiger Eugen JDirectorSale320$1,559.88$499,162Form 4
6 May 2026Elmiger Eugen JDirectorSale814$1,566.36$1.3 millionForm 4
6 May 2026Elmiger Eugen JDirectorSale1,078$1,571.58$1.7 millionForm 4
6 May 2026Elmiger Eugen JDirectorSale834$1,575.57$1.3 millionForm 4
6 May 2026Elmiger Eugen JDirectorSale1,879$1,581.81$3.0 millionForm 4
6 May 2026Elmiger Eugen JDirectorSale2,587$1,586.81$4.1 millionForm 4
6 May 2026Elmiger Eugen JDirectorSale1,355$1,591.38$2.2 millionForm 4
6 May 2026Elmiger Eugen JDirectorSale2,619$1,596.42$4.2 millionForm 4
6 May 2026Elmiger Eugen JDirectorSale514$1,600.14$822,472Form 4
6 May 2026Xiao DemingEVP, Global OperationsSale3,329$1,648.38$5.5 millionForm 4
6 May 2026Xiao DemingEVP, Global OperationsSale14,167$1,652.80$23.4 millionForm 4
6 May 2026Xiao DemingEVP, Global OperationsSale11,597$1,657.93$19.2 millionForm 4
6 May 2026Xiao DemingEVP, Global OperationsSale907$1,661.38$1.5 millionForm 4
6 May 2026Wynne EileenDirectorSale335$1,582.68$530,198Form 4
6 May 2026Zhou JeffDirectorSale500$1,650.00$825,000Form 4
5 May 2026Zhou JeffDirectorSale514$1,574.48$809,283Form 4
5 May 2026Zhou JeffDirectorSale500$1,600.00$800,000Form 4
5 May 2026Sciammas MauriceEVP, WW Sales & MarketingSale380$1,583.81$601,848Form 4
4 May 2026Sciammas MauriceEVP, WW Sales & MarketingSale30$1,588.73$47,662Form 4
8 April 2026Tseng SariaEVP & General CounselSale560$1,266.48$709,229Form 4
8 April 2026Tseng SariaEVP & General CounselSale360$1,270.29$457,304Form 4
8 April 2026Tseng SariaEVP & General CounselSale240$1,279.55$307,092Form 4
8 April 2026Tseng SariaEVP & General CounselSale120$1,287.12$154,454Form 4
8 April 2026Tseng SariaEVP & General CounselSale400$1,292.08$516,832Form 4
8 April 2026Tseng SariaEVP & General CounselSale800$1,302.52$1.0 millionForm 4
8 April 2026Tseng SariaEVP & General CounselSale1,279$1,308.30$1.7 millionForm 4
8 April 2026Tseng SariaEVP & General CounselSale4,244$1,312.82$5.6 millionForm 4
8 April 2026Tseng SariaEVP & General CounselSale840$1,319.25$1.1 millionForm 4

Open-market purchases (code P) and sales (code S) only. Option exercises, grants, tax withholding and gifts are not shown. A filing with several lines appears once per line.

Source

Form 4 filings on EDGAR for Monolithic Power Systems, Inc.: the company's filing index.

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