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 24 Jul 2026
Latest close 22950.00 MXNstored weekly close
1-week move +0.0%latest weekly bar
13-week move -2.9%medium-term context
Relative Strength 13.7Sharemaestro indicator
Fair value gap +55.1%price vs fair value
Trend signal 1smoothed trend state

Transaction History

Latest insider filings for MPWR

Showing 31-60 of 103
Date 18 May 2026
Insider HSING, MICHAELDirector, CEO
Side Disposal
Shares 4082
Price 1476.96
Value 6028951
Security Common Stock
Date 18 May 2026
Insider HSING, MICHAELDirector, CEO
Side Disposal
Shares 3769
Price 1507.70
Value 5682521
Security Common Stock
Date 18 May 2026
Insider HSING, MICHAELDirector, CEO
Side Disposal
Shares 3424
Price 1462.61
Value 5007977
Security Common Stock
Date 18 May 2026
Insider HSING, MICHAELDirector, CEO
Side Disposal
Shares 2929
Price 1503.05
Value 4402433
Security Common Stock
Date 18 May 2026
Insider HSING, MICHAELDirector, CEO
Side Disposal
Shares 862
Price 1491.48
Value 1285656
Security Common Stock
Date 18 May 2026
Insider HSING, MICHAELDirector, CEO
Side Disposal
Shares 608
Price 1499.46
Value 911672
Security Common Stock
Date 18 May 2026
Insider HSING, MICHAELDirector, CEO
Side Disposal
Shares 551
Price 1513.11
Value 833724
Security Common Stock
Date 18 May 2026
Insider HSING, MICHAELDirector, CEO
Side Disposal
Shares 352
Price 1518.15
Value 534389
Security Common Stock
Date 18 May 2026
Insider HSING, MICHAELDirector, CEO
Side Disposal
Shares 130
Price 1521.43
Value 197786
Security Common Stock
Date 18 May 2026
Insider DEAN, ROBERT W IIInterim CFO
Side Disposal
Shares 4
Price 1563.28
Value 6253
Security Common Stock
Date 15 May 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 3741
Price 1550.36
Value 5799897
Security Common Stock
Date 15 May 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 2020
Price 1567.15
Value 3165643
Security Common Stock
Date 15 May 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 2010
Price 1562.01
Value 3139640
Security Common Stock
Date 15 May 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 1717
Price 1557.48
Value 2674193
Security Common Stock
Date 15 May 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 1312
Price 1571.49
Value 2061795
Security Common Stock
Date 15 May 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 703
Price 1577.75
Value 1109158
Security Common Stock
Date 15 May 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 447
Price 1582.21
Value 707248
Security Common Stock
Date 15 May 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 50
Price 1585.51
Value 79276
Security Common Stock
Date 13 May 2026
Insider DEAN, ROBERT W IIInterim CFO
Side Disposal
Shares 2156
Price 0.00
Value 0
Security Common Stock
Date 13 May 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Acquisition
Shares 1563
Price 0.00
Value 0
Security Common Stock
Date 13 May 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 1563
Price 0.00
Value 0
Security Common Stock
Date 6 May 2026
Insider XIAO, DEMINGEVP, Global Operations
Side Disposal
Shares 14167
Price 1652.80
Value 23415218
Security Common Stock
Date 6 May 2026
Insider XIAO, DEMINGEVP, Global Operations
Side Disposal
Shares 11597
Price 1657.93
Value 19227014
Security Common Stock
Date 6 May 2026
Insider XIAO, DEMINGEVP, Global Operations
Side Disposal
Shares 3329
Price 1648.38
Value 5487457
Security Common Stock
Date 6 May 2026
Insider ELMIGER, EUGEN JDirector
Side Disposal
Shares 2619
Price 1596.42
Value 4181024
Security Common Stock
Date 6 May 2026
Insider ELMIGER, EUGEN JDirector
Side Disposal
Shares 2587
Price 1586.81
Value 4105077
Security Common Stock
Date 6 May 2026
Insider ELMIGER, EUGEN JDirector
Side Disposal
Shares 1879
Price 1581.81
Value 2972221
Security Common Stock
Date 6 May 2026
Insider ELMIGER, EUGEN JDirector
Side Disposal
Shares 1355
Price 1591.38
Value 2156320
Security Common Stock
Date 6 May 2026
Insider ELMIGER, EUGEN JDirector
Side Disposal
Shares 1078
Price 1571.58
Value 1694163
Security Common Stock
Date 6 May 2026
Insider XIAO, DEMINGEVP, Global Operations
Side Disposal
Shares 907
Price 1661.38
Value 1506872
Security Common Stock