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Who

Robert W. Dean II

Interim CFO

Company insider

Files Form 4 as: Interim CFO, Monolithic Power Systems; Controller, Varian.

In numbers

Trades disclosed
31
Buys
0
Sells
5
Bought
$0
Sold
$467K
Companies
2
Companies where not an officer
0
First trade
15 Sep 2008
Last trade
24 Aug 2026
Last filed
26 Aug 2026

Companies traded

Where they are an officer
MPWR Monolithic Power SystemsOfficer · Semiconductors · last 24 Aug 20260 buys · 5 sells
VarianOfficer · last 14 May 20100 buys · 0 sells

Activity over time

1 May – 1 Oct
30May 26Jun 26Aug 26Sep 26Oct 26

Buys above the line, sells below, each month.

Every trade

TradedCompanyWhatAmount
24 Aug 2026filed 26 Aug 2026MPWR Monolithic Power SystemsSemiconductorsSEC FORM 4 Sold$42K32 at $1,297.72filing
24 Aug 2026filed 26 Aug 2026MPWR Monolithic Power SystemsSemiconductorsSEC FORM 4 Code J—5 at $0.00filing
24 Aug 2026filed 26 Aug 2026MPWR Monolithic Power SystemsSemiconductorsSEC FORM 4 Sold$42K32 at $1,297.72filing
24 Aug 2026filed 26 Aug 2026MPWR Monolithic Power SystemsSemiconductorsSEC FORM 4 Code J—5 at $0.00filing
17 Aug 2026filed 19 Aug 2026MPWR Monolithic Power SystemsSemiconductorsSEC FORM 4 Sold$8,4826 at $1,413.64filing
17 Aug 2026filed 19 Aug 2026MPWR Monolithic Power SystemsSemiconductorsSEC FORM 4 Sold$8,4826 at $1,413.64filing
5 Aug 2026filed 6 Aug 2026MPWR Monolithic Power SystemsSemiconductorsSEC FORM 4 Sold$141K105 at $1,344.27filing
5 Aug 2026filed 6 Aug 2026MPWR Monolithic Power SystemsSemiconductorsSEC FORM 4 Sold$141K105 at $1,344.27filing
25 Jul 2026filed 28 Jul 2026MPWR Monolithic Power SystemsSemiconductorsSEC FORM 4 Code A—1,359 at $0.00filing
25 Jul 2026filed 28 Jul 2026MPWR Monolithic Power SystemsSemiconductorsSEC FORM 4 Code A—1,359 at $0.00filing
26 May 2026filed 28 May 2026MPWR Monolithic Power SystemsSemiconductorsSEC FORM 4 Sold$36K22 at $1,649.56filing
26 May 2026filed 28 May 2026MPWR Monolithic Power SystemsSemiconductorsSEC FORM 4 Sold$36K22 at $1,649.56filing
18 May 2026filed 20 May 2026MPWR Monolithic Power SystemsSemiconductorsSEC FORM 4 Sold$6,2534 at $1,563.28filing
18 May 2026filed 20 May 2026MPWR Monolithic Power SystemsSemiconductorsSEC FORM 4 Sold$6,2534 at $1,563.28filing
13 May 2026filed 15 May 2026MPWR Monolithic Power SystemsSemiconductorsSEC FORM 4 Code J—2,156 at $0.00filing
13 May 2026filed 15 May 2026MPWR Monolithic Power SystemsSemiconductorsSEC FORM 4 Code J—2,156 at $0.00filing
14 May 2010filed 14 May 2010Varianoption or derivativeSEC FORM 4 Code D—3,000 at $0.00filing
14 May 2010filed 14 May 2010Varianoption or derivativeSEC FORM 4 Code D—5,500 at $0.00filing
14 May 2010filed 14 May 2010Varianoption or derivativeSEC FORM 4 Code D—1,800 at $0.00filing
14 May 2010filed 14 May 2010VarianSEC FORM 4 Code D$104K1,999 at $52.00filing

Sectors

Technology5

Buys in green, sells in red, by the company’s sector.

Related people

Michael HsingCEO · CEO at Monolithic Power Systems, filing Form 4 there in the last year
Saria TsengEVP & General Counsel · EVP & General Counsel at Monolithic Power Systems, filing Form 4 there in the last year
Kuo Wei Herbert ChangDirector · Director at Monolithic Power Systems, filing Form 4 there in the last year
Maurice SciammasEVP, WW Sales & Marketing · EVP, WW Sales & Marketing at Monolithic Power Systems, filing Form 4 there in the last year
Jeff ZhouDirector · Director at Monolithic Power Systems, filing Form 4 there in the last year
Ro KhannaRepresentative, CA-17 · Also traded MPWR in the last 90 days