Insider Transactions in Q4 2025 at Monolithic Power Systems Inc (MPWR)
Insider Transaction List (Q4 2025)
| Date | Insider | Transaction | Ownership Type | Shares Traded | Value / Price |
|---|---|---|---|---|---|
|
Dec 24
2025
|
Victor K Lee |
SELL
Open market or private sale
|
Direct |
1,000
-0.57%
|
$952,000
$952.18 P/Share
|
|
Dec 09
2025
|
Michael Hsing CEO |
SELL
Bona fide gift
|
Direct |
12,337
-1.34%
|
-
|
|
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
|