Company Insider Tape

Monolithic Power Systems, Inc. insider transactions

Executive and director filing history, acquisition and disposal balance, executive concentration, cadence, and stored market context.

Symbol MPWR Latest filing 15 Jul 2026

Company Read

Net disposal

MPWR has 103 stored insider filings. Acquisitions account for 1.0% of classified filings and disposals account for 99.0%. The largest stored filing is $23.4M from XIAO, DEMING.

Latest filing 15 Jul 2026most recent stored row
Largest filing $23.4Mreported transaction value
Total filings 103stored transaction rows
Acquisition value $01 acquisitions
Disposal value $240.5M102 disposals
Net value $-240.5Macquisitions minus disposals

Filing cadence

Last 12 active months
Mar 2026 9
Apr 2026 24
May 2026 50
Jun 2026 1
Jul 2026 19

Acquisitions 1.0% · Disposals 99.0%

Mar 2026 $26.0M
Apr 2026 $22.2M
May 2026 $172.0M
Jun 2026 $46.0K
Jul 2026 $20.3M

Executive concentration

By filing count
SCIAMMAS, MAURICE EVP, WW Sales & Marketing · 35 filings
TSENG, SARIA EVP & General Counsel · 34 filings
HSING, MICHAEL Director, CEO · 13 filings
ELMIGER, EUGEN J Director · 9 filings
XIAO, DEMING EVP, Global Operations · 4 filings
ZHOU, JEFF Director · 4 filings
DEAN, ROBERT W II Interim CFO · 3 filings
WYNNE, EILEEN Director · 1 filings

Market Context

MPWR weekly market snapshot

Week 31 Jul 2026
Latest close 25105.00 MXNstored weekly close
1-week move +9.4%latest weekly bar
13-week move +8.4%medium-term context
Relative Strength 22.4Sharemaestro indicator
Fair value gap +68.5%price vs fair value
Trend signal 1smoothed trend state

Transaction History

Latest insider filings for MPWR

Showing 91-103 of 103
Date 1 Apr 2026
Insider TSENG, SARIAEVP & General Counsel
Side Disposal
Shares 188
Price 1135.91
Value 213551
Security Common Stock
Date 1 Apr 2026
Insider TSENG, SARIAEVP & General Counsel
Side Disposal
Shares 184
Price 1132.15
Value 208316
Security Common Stock
Date 1 Apr 2026
Insider TSENG, SARIAEVP & General Counsel
Side Disposal
Shares 160
Price 1134.14
Value 181462
Security Common Stock
Date 1 Apr 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 30
Price 1116.44
Value 33493
Security Common Stock
Date 30 Mar 2026
Insider TSENG, SARIAEVP & General Counsel
Side Disposal
Shares 9080
Price 1005.18
Value 9127034
Security Common Stock
Date 30 Mar 2026
Insider TSENG, SARIAEVP & General Counsel
Side Disposal
Shares 5154
Price 1000.81
Value 5158175
Security Common Stock
Date 30 Mar 2026
Insider TSENG, SARIAEVP & General Counsel
Side Disposal
Shares 3360
Price 1009.63
Value 3392357
Security Common Stock
Date 30 Mar 2026
Insider TSENG, SARIAEVP & General Counsel
Side Disposal
Shares 3194
Price 1017.22
Value 3249001
Security Common Stock
Date 30 Mar 2026
Insider TSENG, SARIAEVP & General Counsel
Side Disposal
Shares 2440
Price 1029.21
Value 2511272
Security Common Stock
Date 30 Mar 2026
Insider TSENG, SARIAEVP & General Counsel
Side Disposal
Shares 2200
Price 1023.00
Value 2250600
Security Common Stock
Date 30 Mar 2026
Insider TSENG, SARIAEVP & General Counsel
Side Disposal
Shares 166
Price 1035.60
Value 171910
Security Common Stock
Date 30 Mar 2026
Insider TSENG, SARIAEVP & General Counsel
Side Disposal
Shares 80
Price 1041.12
Value 83290
Security Common Stock
Date 20 Mar 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 30
Price 1095.07
Value 32852
Security Common Stock