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Insider Trading

Monolithic Power Systems

Information Technology / Semiconductors

Recent Insider Transactions

Source: SEC Form 4 filings. Updated daily. Transaction codes: P = Open-Market Purchase, S = Open-Market Sale, F = Tax Withholding, A = Award, M = Option Exercise.

DateReporterTypeSharesPriceTotal Value
May 28, 2026
DEAN ROBERT W II
Interim CFO
SOpen-Market Sale
22$2K$36K
May 27, 2026
Zhou Jeff
SOpen-Market Sale
486$2K$816K
May 27, 2026
Tseng Saria
EVP & General Counsel
GG
200$0.00$0.00
May 20, 2026
DEAN ROBERT W II
Interim CFO
SOpen-Market Sale
4$2K$6K
May 20, 2026
Hsing Michael
CEO
SOpen-Market Sale
40,000$1K$59.3M
May 19, 2026
Sciammas Maurice
EVP, WW Sales & Marketing
SOpen-Market Sale10b5-1
12,000$2K$18.7M
May 15, 2026
DEAN ROBERT W II
Interim CFO
JJ
2,156$0.00$0.00
May 15, 2026
Sciammas Maurice
EVP, WW Sales & Marketing
GG
3,126$0.00$0.00
May 8, 2026
Elmiger Eugen J
SOpen-Market Sale
12,000$2K$19.0M
May 8, 2026
Wynne Eileen
SOpen-Market Sale
335$2K$530K
May 8, 2026
Xiao Deming
EVP, Global Operations
SOpen-Market Sale
30,000$2K$49.6M
May 6, 2026
Zhou Jeff
SOpen-Market Sale
1,514$2K$2.4M
May 6, 2026
Sciammas Maurice
EVP, WW Sales & Marketing
SOpen-Market Sale10b5-1
30$2K$48K
May 6, 2026
Sciammas Maurice
EVP, WW Sales & Marketing
SOpen-Market Sale
380$2K$602K
Apr 10, 2026
Tseng Saria
EVP & General Counsel
SOpen-Market Sale10b5-1
8,963$1K$11.7M
Apr 8, 2026
Tseng Saria
EVP & General Counsel
SOpen-Market Sale10b5-1
7,636$1K$8.9M
Apr 1, 2026
Tseng Saria
EVP & General Counsel
SOpen-Market Sale10b5-1
25,674$1K$25.9M
Mar 24, 2026
Sciammas Maurice
EVP, WW Sales & Marketing
SOpen-Market Sale10b5-1
30$1K$33K

Planned Sales (Form 144)

Form 144 filings signal an insider's intent to sell restricted or control securities. These are plans, not completed transactions.

FiledFilerShares to SellMarket ValueApprox. Sale DateBroker
May 28, 2026SARIA TSENG7,565$12.9MMay 27, 2026Morgan Stanley Smith Barney LLC Executive Financial Services
May 26, 2026JEFF ZHOU486$816KMay 26, 2026Morgan Stanley Smith Barney LLC Executive Financial Services
May 26, 2026DEAN ROBERT W II22$36KMay 26, 2026Morgan Stanley Smith Barney LLC Executive Financial Services
May 22, 2026SARIA TSENG5,000$7.9MMay 22, 2026Morgan Stanley Smith Barney LLC Executive Financial Services

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