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 1-30 of 103
Date 15 Jul 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 5640
Price 1352.95
Value 7630638
Security Common Stock
Date 15 Jul 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 1864
Price 1344.16
Value 2505514
Security Common Stock
Date 15 Jul 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 1506
Price 1348.91
Value 2031458
Security Common Stock
Date 15 Jul 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 1460
Price 1339.59
Value 1955801
Security Common Stock
Date 15 Jul 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 776
Price 1334.59
Value 1035642
Security Common Stock
Date 15 Jul 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 527
Price 1314.03
Value 692494
Security Common Stock
Date 15 Jul 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 472
Price 1375.47
Value 649222
Security Common Stock
Date 15 Jul 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 464
Price 1329.30
Value 616795
Security Common Stock
Date 15 Jul 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 418
Price 1378.73
Value 576309
Security Common Stock
Date 15 Jul 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 410
Price 1384.11
Value 567485
Security Common Stock
Date 15 Jul 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 409
Price 1323.93
Value 541487
Security Common Stock
Date 15 Jul 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 274
Price 1318.42
Value 361247
Security Common Stock
Date 15 Jul 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 240
Price 1369.18
Value 328603
Security Common Stock
Date 15 Jul 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 213
Price 1396.16
Value 297382
Security Common Stock
Date 15 Jul 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 117
Price 1400.45
Value 163853
Security Common Stock
Date 15 Jul 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 110
Price 1405.71
Value 154628
Security Common Stock
Date 15 Jul 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 50
Price 1388.19
Value 69410
Security Common Stock
Date 15 Jul 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 50
Price 1359.36
Value 67968
Security Common Stock
Date 1 Jul 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 30
Price 1351.61
Value 40548
Security Common Stock
Date 1 Jun 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 30
Price 1533.95
Value 46019
Security Common Stock
Date 29 May 2026
Insider SCIAMMAS, MAURICEEVP, WW Sales & Marketing
Side Disposal
Shares 12472
Price 0.00
Value 0
Security Common Stock
Date 27 May 2026
Insider TSENG, SARIAEVP & General Counsel
Side Disposal
Shares 7565
Price 1700.00
Value 12860500
Security Common Stock
Date 26 May 2026
Insider ZHOU, JEFFDirector
Side Disposal
Shares 486
Price 1680.00
Value 816480
Security Common Stock
Date 26 May 2026
Insider DEAN, ROBERT W IIInterim CFO
Side Disposal
Shares 22
Price 1649.56
Value 36290
Security Common Stock
Date 22 May 2026
Insider TSENG, SARIAEVP & General Counsel
Side Disposal
Shares 5000
Price 1586.43
Value 7932150
Security Common Stock
Date 22 May 2026
Insider TSENG, SARIAEVP & General Counsel
Side Disposal
Shares 200
Price 0.00
Value 0
Security Common Stock
Date 18 May 2026
Insider HSING, MICHAELDirector, CEO
Side Disposal
Shares 6688
Price 1486.76
Value 9943451
Security Common Stock
Date 18 May 2026
Insider HSING, MICHAELDirector, CEO
Side Disposal
Shares 5819
Price 1467.62
Value 8540081
Security Common Stock
Date 18 May 2026
Insider HSING, MICHAELDirector, CEO
Side Disposal
Shares 5737
Price 1482.51
Value 8505160
Security Common Stock
Date 18 May 2026
Insider HSING, MICHAELDirector, CEO
Side Disposal
Shares 5049
Price 1472.84
Value 7436369
Security Common Stock