MPWR
Monolithic Power Systems, Inc.$1351.33-26.38 (-1.92%)Prev Close$1376.41·MCap$64.63B·P/E99.32·Vol392.4K·Yield0.01%
▲
Buys (12M)
0
$0.00
▼
Sells (12M)
56
$1.00B
◆
Net Activity
Net Seller
$1.00B
●
Active Insiders
12
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 56 insider sales totaling $1.00B. The most recent insider transaction was by Sciammas Maurice (officer: EVP, WW Sales & Marketing), who sold $40.5K worth of shares on Jul 6, 2026. Monolithic Power Systems, Inc. operates in the Technology sector, within the Semiconductors industry, with a market cap of $64.63B.
MPWR Insider Trading Activity
| Date | Insider | Role | Type | Shares | Avg Price | Value | Shares After |
|---|---|---|---|---|---|---|---|
| Jul 6, 2026 | Sciammas Maurice | officer: EVP, WW Sales & Marketing | Sell | 30 | $1351.61 | $40.5K | 1,149 |
| Jun 3, 2026 | Sciammas Maurice | officer: EVP, WW Sales & Marketing | Sell | 30 | $1533.95 | $46.0K | 1,179 |
| May 29, 2026 | Tseng Saria | officer: EVP & General Counsel | Sell | 7,565 | $1700.00 | $12.86M | 144,218 |
| May 28, 2026 | DEAN ROBERT W II | officer: Interim CFO | Sell | 22 | $1649.56 | $36.3K | 5,878 |
| May 27, 2026 | Zhou Jeff | director | Sell | 486 | $1680.00 | $816.5K | 3,800 |
| May 27, 2026 | Tseng Saria | officer: EVP & General Counsel | Sell | 5,000 | $1586.43 | $7.93M | 151,783 |
| May 20, 2026 | DEAN ROBERT W II | officer: Interim CFO | Sell | 4 | $1563.28 | $6.3K | 5,900 |
| May 20, 2026 | Hsing Michael | director, officer: CEO | Sell | 40,000 | $1482.75 | $59.31M | 884,839 |
| May 19, 2026 | Sciammas Maurice | officer: EVP, WW Sales & Marketing | Sell | 12,000 | $1561.40 | $18.74M | 174,903 |
| May 8, 2026 | Wynne Eileen | director | Sell | 335 | $1582.68 | $530.2K | 1,007 |
| May 8, 2026 | Xiao Deming | officer: EVP, Global Operations | Sell | 30,000 | $1654.55 | $49.64M | 232,630 |
| May 8, 2026 | Elmiger Eugen J | director | Sell | 12,000 | $1584.96 | $19.02M | 17,082-41% |
| May 6, 2026 | Sciammas Maurice | officer: EVP, WW Sales & Marketing | Sell | 410 | $1584.17 | $649.5K | 1,209-25% |
| May 6, 2026 | Zhou Jeff | director | Sell | 1,514 | $1607.85 | $2.43M | 5,286 |
| Apr 10, 2026 | Tseng Saria | officer: EVP & General Counsel | Sell | 8,843 | $1305.46 | $11.54M | 165,386 |
| Apr 8, 2026 | Tseng Saria | officer: EVP & General Counsel | Sell | 7,636 | $1167.95 | $8.92M | 173,338 |
| 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 |
Showing 1–50 of 371
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 |
|---|---|---|---|---|---|---|---|
| Jul 6, 2026 | Sciammas Maurice | officer: EVP, WW Sales & Marketing | Sell | 30 | $1351.61 | $40.5K | 1,149 |
| Jun 3, 2026 | Sciammas Maurice | officer: EVP, WW Sales & Marketing | Sell | 30 | $1533.95 | $46.0K | 1,179 |
| May 29, 2026 | Tseng Saria | officer: EVP & General Counsel | Sell | 7,565 | $1700.00 | $12.86M | 144,218 |
| May 28, 2026 | DEAN ROBERT W II | officer: Interim CFO | Sell | 22 | $1649.56 | $36.3K | 5,878 |
| May 27, 2026 | Zhou Jeff | director | Sell | 486 | $1680.00 | $816.5K | 3,800 |
| May 27, 2026 | Tseng Saria | officer: EVP & General Counsel | Sell | 5,000 | $1586.43 | $7.93M | 151,783 |
| May 20, 2026 | DEAN ROBERT W II | officer: Interim CFO | Sell | 4 | $1563.28 | $6.3K | 5,900 |
| May 20, 2026 | Hsing Michael | director, officer: CEO | Sell | 40,000 | $1482.75 | $59.31M | 884,839 |
| May 19, 2026 | Sciammas Maurice | officer: EVP, WW Sales & Marketing | Sell | 12,000 | $1561.40 | $18.74M | 174,903 |
| May 8, 2026 | Wynne Eileen | director | Sell | 335 | $1582.68 | $530.2K | 1,007 |
| May 8, 2026 | Xiao Deming | officer: EVP, Global Operations | Sell | 30,000 | $1654.55 | $49.64M | 232,630 |
| May 8, 2026 | Elmiger Eugen J | director | Sell | 12,000 | $1584.96 | $19.02M | 17,082-41% |
| May 6, 2026 | Sciammas Maurice | officer: EVP, WW Sales & Marketing | Sell | 410 | $1584.17 | $649.5K | 1,209-25% |
| May 6, 2026 | Zhou Jeff | director | Sell | 1,514 | $1607.85 | $2.43M | 5,286 |
| Apr 10, 2026 | Tseng Saria | officer: EVP & General Counsel | Sell | 8,843 | $1305.46 | $11.54M | 165,386 |
| Apr 8, 2026 | Tseng Saria | officer: EVP & General Counsel | Sell | 7,636 | $1167.95 | $8.92M | 173,338 |
| 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 |
MPWR Insiders
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