MPWR
Monolithic Power Systems, Inc.$1118.55-2.08 (-0.19%)Prev Close$1119.51·MCap$49.23B·P/E87.05·Vol229.9K·Yield0.01%
▲
Buys (12M)
0
$0.00
▼
Sells (12M)
45
$824.59M
◆
Net Activity
Net Seller
$824.59M
●
Active Insiders
10
last 12 mo
Over the past 12 months, insider activity at Monolithic Power Systems, Inc. (MPWR) has been exclusively selling, with 0 insider purchases totaling $0.00 and 45 insider sales totaling $824.59M. The most recent insider transaction was by Tseng Saria (officer: EVP & General Counsel), who sold $25.94M worth of shares on Apr 1, 2026. Monolithic Power Systems, Inc. operates in the Technology sector, within the Semiconductors industry, with a market cap of $49.23B.
MPWR Insider Trading Activity
| Date | Insider | Role | Type | Shares | Avg Price | Value | Shares After |
|---|---|---|---|---|---|---|---|
| Apr 1, 2026 | Tseng Saria | officer: EVP & General Counsel | Sell | 25,674 | $1010.50 | $25.94M | 195,502 |
| Mar 24, 2026 | Sciammas Maurice | officer: EVP, WW Sales & Marketing | Sell | 30 | $1095.07 | $32.9K | 1,269 |
| Feb 13, 2026 | Hsing Michael | director, officer: CEO | Sell | 33,000 | $1188.92 | $39.23M | 953,871 |
| Feb 12, 2026 | Hsing Michael | director, officer: CEO | Sell | 67,000 | $1156.83 | $77.51M | 983,932 |
| Feb 12, 2026 | Sciammas Maurice | officer: EVP, WW Sales & Marketing | Sell | 200 | $1179.98 | $236.0K | 1,299 |
| Feb 11, 2026 | Lee Victor K | director | Sell | 400 | $1212.16 | $484.9K | 27,756 |
| Feb 10, 2026 | BLEGEN THEODORE | officer: EVP and CFO | Sell | 21,725 | $1171.16 | $25.44M | 82,353 |
| Feb 10, 2026 | Hsing Michael | director, officer: CEO | Sell | 54,923 | $1171.16 | $64.32M | 988,234 |
| Feb 10, 2026 | Sciammas Maurice | officer: EVP, WW Sales & Marketing | Sell | 22,875 | $1171.17 | $26.79M | 178,625 |
| Feb 10, 2026 | Tseng Saria | officer: EVP & General Counsel | Sell | 22,875 | $1171.17 | $26.79M | 200,626 |
| Feb 10, 2026 | Xiao Deming | officer: EVP, Global Operations | Sell | 22,875 | $1171.17 | $26.79M | 235,932 |
| Feb 4, 2026 | BLEGEN THEODORE | EVP and CFO | Sell | 3,000 | $1129.76 | $3.39M | 0 |
| Jan 6, 2026 | BLEGEN THEODORE | EVP and CFO | Sell | 3,000 | $940.47 | $2.82M | 0 |
| Jan 6, 2026 | Lee Victor K | Director | Sell | 600 | $930.86 | $558.5K | 0 |
| Dec 29, 2025 | Lee Victor K | Director | Sell | 1,000 | $951.72 | $951.7K | 0 |
| Dec 2, 2025 | BLEGEN THEODORE | EVP and CFO | Sell | 3,000 | $908.21 | $2.72M | 0 |
| Nov 28, 2025 | Tseng Saria | EVP & General Counsel | Sell | 40,000 | $915.33 | $36.61M | 0 |
| Nov 25, 2025 | CHANG KUO WEI HERBERT | Director | Sell | 100 | $896.97 | $89.7K | 0 |
| Nov 25, 2025 | Sciammas Maurice | EVP, WW Sales & Marketing | Sell | 3,976 | $895.23 | $3.56M | 0 |
| Nov 24, 2025 | CHANG KUO WEI HERBERT | Director | Sell | 100 | $873.97 | $87.4K | 0 |
| Nov 20, 2025 | Sciammas Maurice | EVP, WW Sales & Marketing | Sell | 35,000 | $879.35 | $30.78M | 0 |
| Nov 13, 2025 | Hsing Michael | CEO | Sell | 77,000 | $961.82 | $74.06M | 0 |
| Nov 6, 2025 | Sciammas Maurice | EVP, WW Sales & Marketing | Sell | 200 | $986.81 | $197.4K | 0 |
| Nov 4, 2025 | BLEGEN THEODORE | EVP and CFO | Sell | 3,000 | $1024.43 | $3.07M | 0 |
| Oct 31, 2025 | BLEGEN THEODORE | EVP and CFO | Sell | 48,298 | $1096.63 | $52.97M | 0 |
| Oct 31, 2025 | Hsing Michael | CEO | Sell | 121,918 | $1096.63 | $133.70M | 0 |
| Oct 31, 2025 | Tseng Saria | EVP & General Counsel | Sell | 54,543 | $1096.63 | $59.81M | 0 |
| Oct 24, 2025 | Tseng Saria | EVP & General Counsel | Sell | 1,300 | $1087.62 | $1.41M | 0 |
| Oct 17, 2025 | Tseng Saria | EVP & General Counsel | Sell | 16,840 | $1017.77 | $17.14M | 0 |
| Oct 1, 2025 | BLEGEN THEODORE | EVP and CFO | Sell | 3,000 | $913.22 | $2.74M | 0 |
| Sep 23, 2025 | Martinez Carintia | Director | Sell | 1,400 | $900.00 | $1.26M | 0 |
| Sep 23, 2025 | Tseng Saria | EVP & General Counsel | Sell | 14,510 | $914.45 | $13.27M | 0 |
| Sep 3, 2025 | BLEGEN THEODORE | EVP and CFO | Sell | 3,000 | $814.34 | $2.44M | 0 |
| Sep 2, 2025 | Elmiger Eugen J | Director | Sell | 4,000 | $846.71 | $3.39M | 0 |
| Aug 28, 2025 | Zhou Jeff | Director | Sell | 193 | $870.00 | $167.9K | 0 |
| Aug 18, 2025 | Hsing Michael | CEO | Sell | 20,231 | $829.10 | $16.77M | 0 |
| Aug 15, 2025 | Zhou Jeff | Director | Sell | 400 | $850.00 | $340.0K | 0 |
| Aug 13, 2025 | Zhou Jeff | Director | Sell | 200 | $830.00 | $166.0K | 0 |
| Aug 4, 2025 | BLEGEN THEODORE | EVP and CFO | Sell | 3,000 | $750.00 | $2.25M | 0 |
| Aug 4, 2025 | Xiao Deming | EVP, Global Operations | Sell | 39,999 | $780.00 | $31.20M | 0 |
| Jul 2, 2025 | BLEGEN THEODORE | EVP and CFO | Sell | 6,000 | $750.00 | $4.50M | 0 |
| May 13, 2025 | CHANG KUO WEI HERBERT | Director | Sell | 50 | $738.00 | $36.9K | 0 |
| May 12, 2025 | CHANG KUO WEI HERBERT | Director | Sell | 100 | $698.00 | $69.8K | 0 |
| May 12, 2025 | Sciammas Maurice | EVP, WW Sales & Marketing | Sell | 12,000 | $701.00 | $8.41M | 0 |
| May 9, 2025 | CHANG KUO WEI HERBERT | Director | Sell | 100 | $650.00 | $65.0K | 0 |
| Feb 20, 2025 | Hsing Michael | CEO | Sell | 5,200 | $700.00 | $3.64M | 0 |
| Feb 12, 2025 | BLEGEN THEODORE | EVP and CFO | Sell | 532 | $717.10 | $381.5K | 0 |
| Feb 12, 2025 | Hsing Michael | CEO | Sell | 2,594 | $717.10 | $1.86M | 0 |
| Feb 12, 2025 | Tseng Saria | EVP & General Counsel | Sell | 663 | $717.10 | $475.4K | 0 |
| Feb 12, 2025 | Xiao Deming | EVP, Global Operations | Sell | 662 | $717.10 | $474.7K | 0 |
Showing 1–50 of 355
1 / 8
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MPWR Insider Buying Activity
The following table shows recent insider purchases of Monolithic Power Systems, Inc. (MPWR) stock reported via SEC Form 4 filings.
No insider buying activity found for MPWR in the last 12 months.
MPWR Insider Selling Activity
The following table shows recent insider sales of Monolithic Power Systems, Inc. (MPWR) stock reported via SEC Form 4 filings.
| Date | Insider | Role | Type | Shares | Avg Price | Value | Shares After |
|---|---|---|---|---|---|---|---|
| Apr 1, 2026 | Tseng Saria | officer: EVP & General Counsel | Sell | 25,674 | $1010.50 | $25.94M | 195,502 |
| Mar 24, 2026 | Sciammas Maurice | officer: EVP, WW Sales & Marketing | Sell | 30 | $1095.07 | $32.9K | 1,269 |
| Feb 13, 2026 | Hsing Michael | director, officer: CEO | Sell | 33,000 | $1188.92 | $39.23M | 953,871 |
| Feb 12, 2026 | Hsing Michael | director, officer: CEO | Sell | 67,000 | $1156.83 | $77.51M | 983,932 |
| Feb 12, 2026 | Sciammas Maurice | officer: EVP, WW Sales & Marketing | Sell | 200 | $1179.98 | $236.0K | 1,299 |
| Feb 11, 2026 | Lee Victor K | director | Sell | 400 | $1212.16 | $484.9K | 27,756 |
| Feb 10, 2026 | BLEGEN THEODORE | officer: EVP and CFO | Sell | 21,725 | $1171.16 | $25.44M | 82,353 |
| Feb 10, 2026 | Hsing Michael | director, officer: CEO | Sell | 54,923 | $1171.16 | $64.32M | 988,234 |
| Feb 10, 2026 | Sciammas Maurice | officer: EVP, WW Sales & Marketing | Sell | 22,875 | $1171.17 | $26.79M | 178,625 |
| Feb 10, 2026 | Tseng Saria | officer: EVP & General Counsel | Sell | 22,875 | $1171.17 | $26.79M | 200,626 |
| Feb 10, 2026 | Xiao Deming | officer: EVP, Global Operations | Sell | 22,875 | $1171.17 | $26.79M | 235,932 |
| Feb 4, 2026 | BLEGEN THEODORE | EVP and CFO | Sell | 3,000 | $1129.76 | $3.39M | 0 |
| Jan 6, 2026 | BLEGEN THEODORE | EVP and CFO | Sell | 3,000 | $940.47 | $2.82M | 0 |
| Jan 6, 2026 | Lee Victor K | Director | Sell | 600 | $930.86 | $558.5K | 0 |
| Dec 29, 2025 | Lee Victor K | Director | Sell | 1,000 | $951.72 | $951.7K | 0 |
| Dec 2, 2025 | BLEGEN THEODORE | EVP and CFO | Sell | 3,000 | $908.21 | $2.72M | 0 |
| Nov 28, 2025 | Tseng Saria | EVP & General Counsel | Sell | 40,000 | $915.33 | $36.61M | 0 |
| Nov 25, 2025 | CHANG KUO WEI HERBERT | Director | Sell | 100 | $896.97 | $89.7K | 0 |
| Nov 25, 2025 | Sciammas Maurice | EVP, WW Sales & Marketing | Sell | 3,976 | $895.23 | $3.56M | 0 |
| Nov 24, 2025 | CHANG KUO WEI HERBERT | Director | Sell | 100 | $873.97 | $87.4K | 0 |
| Nov 20, 2025 | Sciammas Maurice | EVP, WW Sales & Marketing | Sell | 35,000 | $879.35 | $30.78M | 0 |
| Nov 13, 2025 | Hsing Michael | CEO | Sell | 77,000 | $961.82 | $74.06M | 0 |
| Nov 6, 2025 | Sciammas Maurice | EVP, WW Sales & Marketing | Sell | 200 | $986.81 | $197.4K | 0 |
| Nov 4, 2025 | BLEGEN THEODORE | EVP and CFO | Sell | 3,000 | $1024.43 | $3.07M | 0 |
| Oct 31, 2025 | BLEGEN THEODORE | EVP and CFO | Sell | 48,298 | $1096.63 | $52.97M | 0 |
| Oct 31, 2025 | Hsing Michael | CEO | Sell | 121,918 | $1096.63 | $133.70M | 0 |
| Oct 31, 2025 | Tseng Saria | EVP & General Counsel | Sell | 54,543 | $1096.63 | $59.81M | 0 |
| Oct 24, 2025 | Tseng Saria | EVP & General Counsel | Sell | 1,300 | $1087.62 | $1.41M | 0 |
| Oct 17, 2025 | Tseng Saria | EVP & General Counsel | Sell | 16,840 | $1017.77 | $17.14M | 0 |
| Oct 1, 2025 | BLEGEN THEODORE | EVP and CFO | Sell | 3,000 | $913.22 | $2.74M | 0 |
| Sep 23, 2025 | Martinez Carintia | Director | Sell | 1,400 | $900.00 | $1.26M | 0 |
| Sep 23, 2025 | Tseng Saria | EVP & General Counsel | Sell | 14,510 | $914.45 | $13.27M | 0 |
| Sep 3, 2025 | BLEGEN THEODORE | EVP and CFO | Sell | 3,000 | $814.34 | $2.44M | 0 |
| Sep 2, 2025 | Elmiger Eugen J | Director | Sell | 4,000 | $846.71 | $3.39M | 0 |
| Aug 28, 2025 | Zhou Jeff | Director | Sell | 193 | $870.00 | $167.9K | 0 |
| Aug 18, 2025 | Hsing Michael | CEO | Sell | 20,231 | $829.10 | $16.77M | 0 |
| Aug 15, 2025 | Zhou Jeff | Director | Sell | 400 | $850.00 | $340.0K | 0 |
| Aug 13, 2025 | Zhou Jeff | Director | Sell | 200 | $830.00 | $166.0K | 0 |
| Aug 4, 2025 | BLEGEN THEODORE | EVP and CFO | Sell | 3,000 | $750.00 | $2.25M | 0 |
| Aug 4, 2025 | Xiao Deming | EVP, Global Operations | Sell | 39,999 | $780.00 | $31.20M | 0 |
| Jul 2, 2025 | BLEGEN THEODORE | EVP and CFO | Sell | 6,000 | $750.00 | $4.50M | 0 |
| May 13, 2025 | CHANG KUO WEI HERBERT | Director | Sell | 50 | $738.00 | $36.9K | 0 |
| May 12, 2025 | CHANG KUO WEI HERBERT | Director | Sell | 100 | $698.00 | $69.8K | 0 |
| May 12, 2025 | Sciammas Maurice | EVP, WW Sales & Marketing | Sell | 12,000 | $701.00 | $8.41M | 0 |
| May 9, 2025 | CHANG KUO WEI HERBERT | Director | Sell | 100 | $650.00 | $65.0K | 0 |
| Feb 20, 2025 | Hsing Michael | CEO | Sell | 5,200 | $700.00 | $3.64M | 0 |
| Feb 12, 2025 | BLEGEN THEODORE | EVP and CFO | Sell | 532 | $717.10 | $381.5K | 0 |
| Feb 12, 2025 | Hsing Michael | CEO | Sell | 2,594 | $717.10 | $1.86M | 0 |
| Feb 12, 2025 | Tseng Saria | EVP & General Counsel | Sell | 663 | $717.10 | $475.4K | 0 |
| Feb 12, 2025 | Xiao Deming | EVP, Global Operations | Sell | 662 | $717.10 | $474.7K | 0 |
MPWR Insiders
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