Latest Insider Transactions at Monolithic Power Systems Inc (MPWR)
This section provides a real-time view of insider transactions for Monolithic Power Systems Inc (MPWR). The data is sourced from Form 4 filings with the SEC, which are filed by insiders of MONOLITHIC POWER SYSTEMS INC to disclose their transactions in the company's securities. By reviewing this information, investors can gain insights into the trading activity of MONOLITHIC POWER SYSTEMS INC's insiders and make more informed investment decisions.
Insider Transaction List
| Date | Insider | Transaction | Ownership Type | Shares Traded | Value / Price |
|---|---|---|---|---|---|
|
Dec 01
2025
|
Theodore Blegen EVP and CFO |
SELL
Open market or private sale
|
Direct |
3,000
-0.41%
|
$2,715,000
$905.29 P/Share
|
|
Nov 26
2025
|
Saria Tseng EVP & General Counsel |
SELL
Open market or private sale
|
Direct |
20,000
-1.23%
|
$18,520,000
$926.44 P/Share
|
|
Nov 25
2025
|
Saria Tseng EVP & General Counsel |
SELL
Open market or private sale
|
Direct |
20,000
-0.53%
|
$18,060,000
$903.43 P/Share
|
|
Nov 25
2025
|
Kuo Wei Herbert Chang |
SELL
Open market or private sale
|
Direct |
100
-19.01%
|
$89,600
$896.97 P/Share
|
|
Nov 24
2025
|
Maurice Sciammas EVP, WW Sales & Marketing |
SELL
Open market or private sale
|
Direct |
3,976
-2.68%
|
$3,558,520
$895.23 P/Share
|
|
Nov 21
2025
|
Kuo Wei Herbert Chang |
SELL
Open market or private sale
|
Direct |
100
-15.97%
|
$87,300
$873.97 P/Share
|
|
Nov 19
2025
|
Maurice Sciammas EVP, WW Sales & Marketing |
SELL
Open market or private sale
|
Direct |
35,000
-0.87%
|
$30,590,000
$874.91 P/Share
|
|
Nov 13
2025
|
Maurice Sciammas EVP, WW Sales & Marketing |
BUY
Bona fide gift
|
Indirect |
4,530
+8.39%
|
-
|
|
Nov 13
2025
|
Maurice Sciammas EVP, WW Sales & Marketing |
SELL
Bona fide gift
|
Indirect |
4,530
-14.52%
|
-
|
|
Nov 12
2025
|
Michael Hsing CEO |
SELL
Open market or private sale
|
Direct |
37,000
-0.21%
|
$35,779,000
$967.03 P/Share
|
|
Nov 11
2025
|
Michael Hsing CEO |
SELL
Open market or private sale
|
Direct |
40,000
-0.24%
|
$38,360,000
$959.5 P/Share
|
|
Nov 05
2025
|
Maurice Sciammas EVP, WW Sales & Marketing |
SELL
Open market or private sale
|
Indirect |
200
-13.34%
|
$197,200
$986.81 P/Share
|
|
Nov 03
2025
|
Theodore Blegen EVP and CFO |
SELL
Open market or private sale
|
Direct |
3,000
-0.18%
|
$3,075,000
$1025.4 P/Share
|
|
Oct 30
2025
|
Michael Hsing CEO |
SELL
Payment of exercise price or tax liability
|
Direct |
121,918
-10.91%
|
$133,622,128
$1096.63 P/Share
|
|
Oct 30
2025
|
Saria Tseng EVP & General Counsel |
SELL
Payment of exercise price or tax liability
|
Direct |
54,543
-20.83%
|
$59,779,128
$1096.63 P/Share
|
|
Oct 30
2025
|
Theodore Blegen EVP and CFO |
SELL
Payment of exercise price or tax liability
|
Direct |
48,298
-38.44%
|
$52,934,608
$1096.63 P/Share
|
|
Oct 30
2025
|
Deming Xiao EVP, Global Operations |
SELL
Payment of exercise price or tax liability
|
Direct |
54,543
-21.29%
|
$59,779,128
$1096.63 P/Share
|
|
Oct 30
2025
|
Maurice Sciammas EVP, WW Sales & Marketing |
SELL
Payment of exercise price or tax liability
|
Direct |
54,543
-22.93%
|
$59,779,128
$1096.63 P/Share
|
|
Oct 25
2025
|
Maurice Sciammas EVP, WW Sales & Marketing |
BUY
Grant, award, or other acquisition
|
Direct |
135,520
+36.3%
|
-
|
|
Oct 25
2025
|
Deming Xiao EVP, Global Operations |
BUY
Grant, award, or other acquisition
|
Direct |
135,520
+34.6%
|
-
|
|
Oct 25
2025
|
Michael Hsing CEO |
BUY
Grant, award, or other acquisition
|
Direct |
302,920
+21.32%
|
-
|
|
Oct 25
2025
|
Theodore Blegen EVP and CFO |
BUY
Grant, award, or other acquisition
|
Direct |
87,690
+41.11%
|
-
|
|
Oct 25
2025
|
Saria Tseng EVP & General Counsel |
BUY
Grant, award, or other acquisition
|
Direct |
135,520
+34.1%
|
-
|
|
Oct 24
2025
|
Saria Tseng EVP & General Counsel |
SELL
Open market or private sale
|
Direct |
1,300
-1.02%
|
$1,413,100
$1087.62 P/Share
|
|
Oct 16
2025
|
Saria Tseng EVP & General Counsel |
SELL
Open market or private sale
|
Direct |
2,812
-1.08%
|
$2,885,112
$1026.04 P/Share
|
|
Oct 15
2025
|
Saria Tseng EVP & General Counsel |
SELL
Open market or private sale
|
Direct |
14,028
-9.71%
|
$14,252,448
$1016.18 P/Share
|
|
Oct 01
2025
|
Theodore Blegen EVP and CFO |
SELL
Open market or private sale
|
Direct |
3,000
-0.58%
|
$2,730,000
$910.33 P/Share
|
|
Sep 18
2025
|
Carintia Martinez |
SELL
Open market or private sale
|
Direct |
1,400
-61.46%
|
$1,260,000
$900.0 P/Share
|
|
Sep 18
2025
|
Saria Tseng EVP & General Counsel |
SELL
Open market or private sale
|
Direct |
14,510
-9.13%
|
$13,262,140
$914.45 P/Share
|
|
Sep 02
2025
|
Theodore Blegen EVP and CFO |
SELL
Open market or private sale
|
Direct |
3,000
-0.5%
|
$2,439,000
$813.62 P/Share
|
|
Aug 29
2025
|
Eugen J Elmiger |
SELL
Open market or private sale
|
Direct |
4,000
-3.41%
|
$3,384,000
$846.86 P/Share
|
|
Aug 27
2025
|
Jeff Zhou |
SELL
Open market or private sale
|
Direct |
193
-3.33%
|
$167,910
$870.0 P/Share
|
|
Aug 19
2025
|
Maurice Sciammas EVP, WW Sales & Marketing |
BUY
Bona fide gift
|
Indirect |
1,499
+50.0%
|
-
|
|
Aug 19
2025
|
Maurice Sciammas EVP, WW Sales & Marketing |
SELL
Bona fide gift
|
Indirect |
2,499
-30.46%
|
-
|
|
Aug 15
2025
|
Michael Hsing CEO |
SELL
Open market or private sale
|
Direct |
20,231
-0.22%
|
$16,791,730
$830.68 P/Share
|
|
Aug 13
2025
|
Jeff Zhou |
SELL
Open market or private sale
|
Direct |
400
-6.45%
|
$340,000
$850.0 P/Share
|
|
Aug 12
2025
|
Jeff Zhou |
SELL
Open market or private sale
|
Direct |
200
-3.12%
|
$166,000
$830.0 P/Share
|
|
Aug 11
2025
|
Deming Xiao EVP, Global Operations |
SELL
Bona fide gift
|
Direct |
945
-0.78%
|
-
|
|
Aug 11
2025
|
Deming Xiao EVP, Global Operations |
BUY
Bona fide gift
|
Indirect |
945
+17.89%
|
-
|
|
Aug 06
2025
|
Maurice Sciammas EVP, WW Sales & Marketing |
SELL
Bona fide gift
|
Indirect |
4,836
-12.91%
|
-
|
|
Aug 06
2025
|
Maurice Sciammas EVP, WW Sales & Marketing |
BUY
Bona fide gift
|
Indirect |
4,836
+9.72%
|
-
|
|
Aug 01
2025
|
Deming Xiao EVP, Global Operations |
SELL
Open market or private sale
|
Direct |
39,999
-24.75%
|
$31,199,220
$780.0 P/Share
|
|
Aug 01
2025
|
Theodore Blegen EVP and CFO |
SELL
Open market or private sale
|
Direct |
3,000
-6.39%
|
$2,250,000
$750.0 P/Share
|
|
Jul 01
2025
|
Theodore Blegen EVP and CFO |
SELL
Open market or private sale
|
Direct |
6,000
-11.33%
|
$4,500,000
$750.0 P/Share
|
|
May 28
2025
|
Maurice Sciammas EVP, WW Sales & Marketing |
BUY
Bona fide gift
|
Indirect |
1,499
+50.0%
|
-
|
|
May 28
2025
|
Maurice Sciammas EVP, WW Sales & Marketing |
SELL
Bona fide gift
|
Indirect |
1,499
-8.7%
|
-
|
|
May 13
2025
|
Kuo Wei Herbert Chang |
SELL
Open market or private sale
|
Direct |
50
-7.4%
|
$36,900
$738.0 P/Share
|
|
May 12
2025
|
Kuo Wei Herbert Chang |
SELL
Open market or private sale
|
Direct |
100
-12.89%
|
$69,800
$698.0 P/Share
|
|
May 12
2025
|
Maurice Sciammas EVP, WW Sales & Marketing |
SELL
Open market or private sale
|
Indirect |
12,000
-74.93%
|
$8,412,000
$701.0 P/Share
|
|
May 09
2025
|
Maurice Sciammas EVP, WW Sales & Marketing |
BUY
Bona fide gift
|
Indirect |
1,878
+4.47%
|
-
|