There have been 50 recent insider transactions recorded for Monolithic Power Systems, Inc. (MPWR), including 15 buys and 29 sells. Total insider buying was valued at RSU Award and total insider selling at $199.34M.
Notable insiders with recent activity include Tseng Saria, Sciammas Maurice, Dean Robert W Ii. Insider transactions can provide insights into how company leadership views the stock's valuation and future prospects.
Insider Transactions — MPWR
| Date |
Name |
Role |
Transaction |
Shares |
Avg. Price |
Value |
Shares Owned |
| 2026-04-01 |
Tseng Saria |
EVP & General Counsel |
Informative Sell |
292 |
$1,136.99 |
$332K |
173,582 |
| 2026-04-01 |
Sciammas Maurice |
EVP, Ww Sales & Marketing |
Informative Sell |
30 |
$1,116.44 |
$33.49K |
1,239 |
| 2026-03-30 |
Tseng Saria |
EVP & General Counsel |
Informative Sell |
80 |
$1,041.12 |
$83.29K |
174,982 |
| 2026-03-20 |
Sciammas Maurice |
EVP, Ww Sales & Marketing |
Informative Sell |
30 |
$1,095.07 |
$32.85K |
1,269 |
| 2026-02-27 |
Dean Robert W Ii |
Interim CFO |
Unknown |
- |
- |
- |
65 |
| 2026-02-12 |
Hsing Michael |
CEO |
Informative Sell |
1,440 |
$1,217.12 |
$1.75M |
888,234 |
| 2026-02-11 |
Sciammas Maurice |
EVP, Ww Sales & Marketing |
Informative Sell |
200 |
$1,179.97 |
$235.99K |
1,299 |
| 2026-02-11 |
Hsing Michael |
CEO |
Informative Sell |
649 |
$1,202.28 |
$780.28K |
921,234 |
| 2026-02-10 |
Hsing Michael |
CEO |
Informative Sell |
280 |
$1,197.26 |
$335.23K |
954,234 |
| 2026-02-09 |
Lee Victor K |
Director |
Informative Sell |
400 |
$1,212.16 |
$484.86K |
27,756 |
| 2026-02-06 |
Xiao Deming |
EVP, Global Operations |
Informative Sell |
22,875 |
$1,171.16 |
$26.79M |
235,932 |
| 2026-02-06 |
Hsing Michael |
CEO |
Informative Sell |
54,923 |
$1,171.16 |
$64.32M |
988,234 |
| 2026-02-06 |
Tseng Saria |
EVP & General Counsel |
Informative Sell |
22,875 |
$1,171.16 |
$26.79M |
200,626 |
| 2026-02-06 |
Sciammas Maurice |
EVP, Ww Sales & Marketing |
Informative Sell |
22,875 |
$1,171.16 |
$26.79M |
178,625 |
| 2026-02-06 |
Blegen Theodore |
EVP and CFO |
Informative Sell |
21,725 |
$1,171.16 |
$25.44M |
82,353 |
| 2026-02-03 |
Chang Kuo Wei Herbert |
Director |
RSU Award |
189 |
- |
- |
615 |
| 2026-02-03 |
Lee Victor K |
Director |
RSU Award |
189 |
- |
- |
28,156 |
| 2026-02-03 |
Xiao Deming |
EVP, Global Operations |
RSU Award |
57,170 |
- |
- |
258,807 |
| 2026-02-03 |
Hsing Michael |
CEO |
RSU Award |
136,825 |
- |
- |
1,043,157 |
| 2026-02-03 |
Tseng Saria |
EVP & General Counsel |
RSU Award |
57,170 |
- |
- |
223,501 |
| 2026-02-03 |
Sciammas Maurice |
EVP, Ww Sales & Marketing |
RSU Award |
57,170 |
- |
- |
201,500 |
| 2026-02-03 |
Blegen Theodore |
EVP and CFO |
RSU Award |
38,745 |
- |
- |
104,078 |
| 2026-02-03 |
Zhou Jeff |
Director |
RSU Award |
189 |
- |
- |
5,800 |
| 2026-02-03 |
Elmiger Eugen J |
Director |
RSU Award |
189 |
- |
- |
17,402 |
| 2026-02-03 |
Wynne Eileen |
Director |
RSU Award |
189 |
- |
- |
1,342 |
| 2026-02-03 |
Martinez Carintia |
Director |
RSU Award |
189 |
- |
- |
1,067 |
| 2026-02-02 |
Blegen Theodore |
EVP and CFO |
Informative Sell |
80 |
$1,139.49 |
$91.16K |
65,333 |
| 2026-01-02 |
Lee Victor K |
Director |
Informative Sell |
600 |
$930.86 |
$558.52K |
27,967 |
| 2026-01-02 |
Blegen Theodore |
EVP and CFO |
Informative Sell |
80 |
$946.62 |
$75.73K |
68,332 |
| 2025-12-24 |
Tseng Saria |
EVP & General Counsel |
Gift (Given) |
1,000 |
- |
- |
166,331 |
| 2025-05-28 |
Sciammas Maurice |
EVP, Ww Sales & Marketing |
Gift (Received) |
1,499 |
- |
- |
1,499 |
| 2025-05-13 |
Chang Kuo Wei Herbert |
Director |
Informative Sell |
50 |
$738.00 |
$36.9K |
626 |
| 2025-05-12 |
Chang Kuo Wei Herbert |
Director |
Informative Sell |
100 |
$698.00 |
$69.8K |
676 |
| 2025-05-12 |
Sciammas Maurice |
EVP, Ww Sales & Marketing |
Informative Sell |
12,000 |
$701.00 |
$8.41M |
4,015 |
| 2025-05-09 |
Sciammas Maurice |
EVP, Ww Sales & Marketing |
Gift (Given) |
1,878 |
- |
- |
17,226 |
| 2025-05-08 |
Chang Kuo Wei Herbert |
Director |
Informative Sell |
100 |
$650.00 |
$65K |
776 |
| 2025-02-18 |
Hsing Michael |
CEO |
Informative Sell |
5,200 |
$700.00 |
$3.64M |
834,898 |
| 2025-02-18 |
Sciammas Maurice |
EVP, Ww Sales & Marketing |
Gift (Given) |
1,102 |
- |
- |
19,104 |
| 2025-02-11 |
Sciammas Maurice |
EVP, Ww Sales & Marketing |
Gift (Given) |
2,525 |
- |
- |
10,899 |
| 2025-02-10 |
Xiao Deming |
EVP, Global Operations |
Informative Sell |
662 |
$717.10 |
$474.72K |
161,577 |
| 2025-02-10 |
Hsing Michael |
CEO |
Informative Sell |
2,594 |
$717.10 |
$1.86M |
840,071 |
| 2025-02-10 |
Tseng Saria |
EVP & General Counsel |
Informative Sell |
663 |
$717.10 |
$475.44K |
158,977 |
| 2025-02-10 |
Sciammas Maurice |
EVP, Ww Sales & Marketing |
Informative Sell |
662 |
$717.10 |
$474.72K |
102,301 |
| 2025-02-10 |
Blegen Theodore |
EVP and CFO |
Informative Sell |
532 |
$717.10 |
$381.5K |
52,912 |
| 2025-02-07 |
Hsing Michael |
CEO |
Informative Sell |
11,964 |
$700.00 |
$8.37M |
842,665 |
| 2025-02-07 |
Sciammas Maurice |
EVP, Ww Sales & Marketing |
Informative Sell |
200 |
$704.92 |
$140.98K |
16,015 |
| 2025-02-04 |
Chang Kuo Wei Herbert |
Director |
RSU Award |
335 |
- |
- |
876 |
| 2025-02-04 |
Lee Victor K |
Director |
RSU Award |
335 |
- |
- |
29,567 |
| 2025-02-04 |
Zhou Jeff |
Director |
RSU Award |
335 |
- |
- |
6,404 |
| 2025-02-04 |
Elmiger Eugen J |
Director |
RSU Award |
335 |
- |
- |
21,213 |
■ Informative Buy/Sell — open market transaction (most significant)
■ Uninformative Buy — award, option exercise, conversion
■ Uninformative Sell — tax withholding, award vest sale
■ Neutral — gift, trust, expiry
