MPWR Monolithic Power Systems
Nasdaq · SEC CIK 1280452 · EDGAR
- Bought, last 12 months
- $0 0 purchases by 0 insiders
- Sold, last 12 months
- $708.68M 57 sales by 11 insiders
- Filings on record
- 443 since 2021-07-06, latest 2026-09-02 17:26
BoughtSold
Most active insiders, 12 months
| Insider | Title | Bought | Sold |
|---|---|---|---|
| Hsing Michael | CEO, Dir | — | $314.44M |
| Tseng Saria | EVP, GC | — | $150.90M |
| Sciammas Maurice | EVP, WW Sales, Marketing | — | $101.39M |
| Xiao Deming | EVP, Gbl Ops | — | $76.43M |
| BLEGEN THEODORE | EVP, CFO | — | $40.19M |
| Elmiger Eugen J | Dir | — | $19.02M |
| Zhou Jeff | Dir | — | $3.25M |
| Lee Victor K | Dir | — | $2.00M |
| Wynne Eileen | Dir | — | $530.2K |
| CHANG KUO WEI HERBERT | Dir | — | $312.2K |
Transactions 480
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-09-02 17:26 | 2026-08-31 | MPWR | Tseng Saria | EVP, GC | G - Gift | $0.00 | -2,000 | 142.2K | -1% | $0 | |
| I | 2026-09-02 17:26 | 2026-08-31 | MPWR | Tseng Saria | EVP, GC | G - Gift | $0.00 | +2,000 | 2,000 | New | $0 |
| 2026-08-26 19:22 | 2026-08-24 | MPWR | DEAN ROBERT W II | Interim CFO | S - Sale | $1,297.72 | -32 | 7,094 | -0.4% | -$41.5K | |
| 2026-08-26 19:22 | 2026-08-24 | MPWR | DEAN ROBERT W II | Interim CFO | J - Other | $0.00 | -5 | 7,089 | -0.1% | $0 | |
| 2026-08-25 19:13 | 2026-08-24 | MPWR | CHANG KUO WEI HERBERT | Dir | S - Sale | $1,281.57 | -50 | 515 | -9% | -$64.1K | |
| 2026-08-19 20:44 | 2026-08-17 | MPWR | DEAN ROBERT W II | Interim CFO | S - Sale | $1,413.64 | -6 | 7,126 | -0.1% | -$8,482 | |
| 2026-08-13 17:23 | 2026-08-11 | MPWR | CHANG KUO WEI HERBERT | Dir | S - Sale | $1,420.00 | -50 | 565 | -8% | -$71.0K | |
| 2026-08-06 20:31 | 2026-08-04 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | G - Gift | $0.00 | -25.0K | 126.6K | -16% | $0 | |
| I | 2026-08-06 20:31 | 2026-08-04 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | G - Gift | $0.00 | +25.0K | 36.1K | +226% | $0 |
| 2026-08-06 18:20 | 2026-08-05 | MPWR | DEAN ROBERT W II | Interim CFO | S - Sale | $1,344.27 | -105 | 7,132 | -1% | -$141.1K | |
| TI | 2026-08-05 17:33 | 2026-08-03 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | S - Sale | $1,343.94 | -30 | 1,119 | -3% | -$40.3K |
| 2026-07-28 18:42 | 2026-07-25 | MPWR | DEAN ROBERT W II | Interim CFO | A - Grant | $0.00 | +1,359 | 7,237 | +23% | $0 | |
| MT | 2026-07-17 17:43 | 2026-07-15 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | S - Sale | $1,349.73 | -15.0K | 151.6K | -9% | -$20.25M |
| TI | 2026-07-06 17:51 | 2026-07-01 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | S - Sale | $1,351.61 | -30 | 1,149 | -3% | -$40.5K |
| TI | 2026-06-03 17:31 | 2026-06-01 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | S - Sale | $1,533.95 | -30 | 1,179 | -2% | -$46.0K |
| I | 2026-06-02 18:36 | 2026-05-29 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | G - Gift | $0.00 | -12.5K | 12.6K | -50% | $0 |
| 2026-05-29 18:43 | 2026-05-27 | MPWR | Tseng Saria | EVP, GC | S - Sale | $1,700.00 | -7,565 | 144.2K | -5% | -$12.86M | |
| 2026-05-28 19:46 | 2026-05-26 | MPWR | DEAN ROBERT W II | Interim CFO | S - Sale | $1,649.56 | -22 | 5,878 | -0.4% | -$36.3K | |
| 2026-05-27 19:28 | 2026-05-26 | MPWR | Zhou Jeff | Dir | S - Sale | $1,680.00 | -486 | 3,800 | -11% | -$816.5K | |
| 2026-05-27 17:07 | 2026-05-22 | MPWR | Tseng Saria | EVP, GC | G - Gift | $0.00 | -200 | 156.8K | -0.1% | $0 | |
| 2026-05-27 17:07 | 2026-05-22 | MPWR | Tseng Saria | EVP, GC | S - Sale | $1,586.43 | -5,000 | 151.8K | -3% | -$7.93M | |
| M | 2026-05-20 20:10 | 2026-05-18 | MPWR | Hsing Michael | CEO, Dir | S - Sale | $1,482.75 | -40.0K | 848.3K | -5% | -$59.31M |
| 2026-05-20 18:52 | 2026-05-18 | MPWR | DEAN ROBERT W II | Interim CFO | S - Sale | $1,563.28 | -4 | 5,900 | -0.1% | -$6,253 | |
| MT | 2026-05-19 19:09 | 2026-05-15 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | S - Sale | $1,561.40 | -12.0K | 166.6K | -7% | -$18.74M |
| MI | 2026-05-15 19:45 | 2026-05-13 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | G - Gift | $0.00 | 0 | 51.0K | New | $0 |
| 2026-05-15 16:15 | 2026-05-13 | MPWR | DEAN ROBERT W II | Interim CFO | J - Other | $0.00 | -2,156 | 5,904 | -27% | $0 | |
| M | 2026-05-08 19:37 | 2026-05-06 | MPWR | Elmiger Eugen J | Dir | S - Sale | $1,584.96 | -12.0K | 5,402 | -69% | -$19.02M |
| M | 2026-05-08 18:15 | 2026-05-06 | MPWR | Xiao Deming | EVP, Gbl Ops | S - Sale | $1,654.55 | -30.0K | 206.0K | -13% | -$49.64M |
| 2026-05-08 14:36 | 2026-05-06 | MPWR | Wynne Eileen | Dir | S - Sale | $1,582.68 | -335 | 1,007 | -25% | -$530.2K | |
| M | 2026-05-06 19:59 | 2026-05-05+ | MPWR | Zhou Jeff | Dir | S - Sale | $1,607.85 | -1,514 | 4,286 | -26% | -$2.43M |
| I | 2026-05-06 15:18 | 2026-05-05 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | S - Sale | $1,583.81 | -380 | 919 | -29% | -$601.8K |
| TI | 2026-05-06 12:55 | 2026-05-04 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | S - Sale | $1,588.73 | -30 | 1,209 | -2% | -$47.7K |
| MT | 2026-04-10 12:46 | 2026-04-08 | MPWR | Tseng Saria | EVP, GC | S - Sale | $1,305.22 | -8,963 | 157.0K | -5% | -$11.70M |
| MT | 2026-04-08 13:42 | 2026-04-06 | MPWR | Tseng Saria | EVP, GC | S - Sale | $1,167.95 | -7,636 | 165.9K | -4% | -$8.92M |
| MT | 2026-04-03 17:36 | 2026-04-01 | MPWR | Tseng Saria | EVP, GC | S - Sale | $1,133.52 | -1,400 | 173.6K | -0.8% | -$1.59M |
| TI | 2026-04-03 15:58 | 2026-04-01 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | S - Sale | $1,116.44 | -30 | 1,239 | -2% | -$33.5K |
| MT | 2026-04-01 18:41 | 2026-03-30 | MPWR | Tseng Saria | EVP, GC | S - Sale | $1,010.50 | -25.7K | 175.0K | -13% | -$25.94M |
| I | 2026-03-24 | 2026-03-20 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | S - Sale | $1,095.07 | -30 | 1,269 | -2% | -$32.9K |
| M | 2026-02-17 | 2026-02-12 | MPWR | Hsing Michael | CEO, Dir | S - Sale | $1,171.83 | -33.0K | 896.6K | -4% | -$38.67M |
| M | 2026-02-13 | 2026-02-11 | MPWR | Hsing Michael | CEO, Dir | S - Sale | $1,188.92 | -33.0K | 952.5K | -3% | -$39.23M |
| I | 2026-02-12 | 2026-02-11 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | S - Sale | $1,179.98 | -200 | 1,299 | -13% | -$236.0K |
| M | 2026-02-12 | 2026-02-10 | MPWR | Hsing Michael | CEO, Dir | S - Sale | $1,142.28 | -34.0K | 955.4K | -3% | -$38.84M |
| 2026-02-11 | 2026-02-09 | MPWR | Lee Victor K | Dir | S - Sale | $1,212.16 | -400 | 27.8K | -1% | -$484.9K | |
| 2026-02-10 | 2026-02-06 | MPWR | Tseng Saria | EVP, GC | S - Sale | $1,171.16 | -22.9K | 200.6K | -10% | -$26.79M | |
| 2026-02-10 | 2026-02-06 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | S - Sale | $1,171.16 | -22.9K | 178.6K | -11% | -$26.79M | |
| 2026-02-10 | 2026-02-06 | MPWR | Hsing Michael | CEO, Dir | S - Sale | $1,171.16 | -54.9K | 988.2K | -5% | -$64.32M | |
| 2026-02-10 | 2026-02-06 | MPWR | Xiao Deming | EVP, Gbl Ops | S - Sale | $1,171.16 | -22.9K | 235.9K | -9% | -$26.79M | |
| 2026-02-10 | 2026-02-06 | MPWR | BLEGEN THEODORE | EVP, CFO | S - Sale | $1,171.16 | -21.7K | 82.4K | -21% | -$25.44M | |
| 2026-02-05 | 2026-02-03 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | A - Grant | $0.00 | +57.2K | 201.5K | +40% | $0 | |
| 2026-02-05 | 2026-02-03 | MPWR | Tseng Saria | EVP, GC | A - Grant | $0.00 | +57.2K | 223.5K | +34% | $0 | |
| 2026-02-05 | 2026-02-03 | MPWR | Lee Victor K | Dir | A - Grant | $0.00 | +189 | 28.2K | +0.7% | $0 | |
| 2026-02-05 | 2026-02-03 | MPWR | Martinez Carintia | Dir | A - Grant | $0.00 | +189 | 1,067 | +22% | $0 | |
| 2026-02-05 | 2026-02-03 | MPWR | Hsing Michael | CEO, Dir | A - Grant | $0.00 | +136.8K | 1.04M | +15% | $0 | |
| 2026-02-05 | 2026-02-03 | MPWR | BLEGEN THEODORE | EVP, CFO | A - Grant | $0.00 | +38.7K | 104.1K | +59% | $0 | |
| 2026-02-05 | 2026-02-03 | MPWR | Xiao Deming | EVP, Gbl Ops | A - Grant | $0.00 | +57.2K | 258.8K | +28% | $0 | |
| 2026-02-05 | 2026-02-03 | MPWR | Elmiger Eugen J | Dir | A - Grant | $0.00 | +189 | 17.4K | +1% | $0 | |
| 2026-02-05 | 2026-02-03 | MPWR | CHANG KUO WEI HERBERT | Dir | A - Grant | $0.00 | +189 | 615 | +44% | $0 | |
| 2026-02-05 | 2026-02-03 | MPWR | Wynne Eileen | Dir | A - Grant | $0.00 | +189 | 1,342 | +16% | $0 | |
| 2026-02-05 | 2026-02-03 | MPWR | Zhou Jeff | Dir | A - Grant | $0.00 | +189 | 5,800 | +3% | $0 | |
| M | 2026-02-04 | 2026-02-02 | MPWR | BLEGEN THEODORE | EVP, CFO | S - Sale | $1,129.76 | -3,000 | 65.5K | -4% | -$3.39M |
| M | 2026-01-06 | 2026-01-02 | MPWR | BLEGEN THEODORE | EVP, CFO | S - Sale | $940.47 | -3,000 | 69.1K | -4% | -$2.82M |
| 2026-01-06 | 2026-01-02 | MPWR | Lee Victor K | Dir | S - Sale | $930.86 | -600 | 28.0K | -2% | -$558.5K | |
| 2025-12-30 | 2025-12-24 | MPWR | Tseng Saria | EVP, GC | G - Gift | $0.00 | -1,000 | 166.3K | -0.6% | $0 | |
| I | 2025-12-30 | 2025-12-24 | MPWR | Tseng Saria | EVP, GC | G - Gift | $0.00 | +1,000 | 1,000 | New | $0 |
| M | 2025-12-29 | 2025-12-24 | MPWR | Lee Victor K | Dir | S - Sale | $951.72 | -1,000 | 29.4K | -3% | -$951.7K |
| 2025-12-11 | 2025-12-09 | MPWR | Hsing Michael | CEO, Dir | G - Gift | $0.00 | -12.3K | 906.3K | -1% | $0 | |
| M | 2025-12-02 | 2025-12-01 | MPWR | BLEGEN THEODORE | EVP, CFO | S - Sale | $908.21 | -3,000 | 74.0K | -4% | -$2.72M |
| M | 2025-11-28 | 2025-11-25 | MPWR | Tseng Saria | EVP, GC | S - Sale | $904.18 | -20.0K | 189.7K | -10% | -$18.08M |
| M | 2025-11-28 | 2025-11-26 | MPWR | Tseng Saria | EVP, GC | S - Sale | $926.47 | -20.0K | 171.2K | -10% | -$18.53M |
| 2025-11-25 | 2025-11-25 | MPWR | CHANG KUO WEI HERBERT | Dir | S - Sale | $896.97 | -100 | 426 | -19% | -$89.7K | |
| 2025-11-25 | 2025-11-24 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | S - Sale | $895.23 | -3,976 | 144.3K | -3% | -$3.56M | |
| 2025-11-24 | 2025-11-21 | MPWR | CHANG KUO WEI HERBERT | Dir | S - Sale | $873.97 | -100 | 526 | -16% | -$87.4K | |
| M | 2025-11-20 | 2025-11-19 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | S - Sale | $870.21 | -7,034 | 178.7K | -4% | -$6.12M |
| M | 2025-11-20 | 2025-11-19 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | S - Sale | $881.66 | -28.0K | 165.3K | -14% | -$24.66M |
| MI | 2025-11-14 | 2025-11-13 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | G - Gift | $0.00 | 0 | 26.7K | New | $0 |
| M | 2025-11-13 | 2025-11-12 | MPWR | Hsing Michael | CEO, Dir | S - Sale | $965.52 | -37.0K | 949.7K | -4% | -$35.72M |
| M | 2025-11-13 | 2025-11-11 | MPWR | Hsing Michael | CEO, Dir | S - Sale | $958.39 | -40.0K | 958.1K | -4% | -$38.34M |
| I | 2025-11-06 | 2025-11-05 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | S - Sale | $986.81 | -200 | 1,299 | -13% | -$197.4K |
| M | 2025-11-04 | 2025-11-03 | MPWR | BLEGEN THEODORE | EVP, CFO | S - Sale | $1,024.43 | -3,000 | 74.3K | -4% | -$3.07M |
| 2025-10-31 | 2025-10-30 | MPWR | Xiao Deming | EVP, Gbl Ops | F - Tax | $1,096.63 | -54.5K | 201.6K | -21% | -$59.81M | |
| 2025-10-31 | 2025-10-30 | MPWR | BLEGEN THEODORE | EVP, CFO | F - Tax | $1,096.63 | -48.3K | 77.3K | -38% | -$52.97M | |
| 2025-10-31 | 2025-10-30 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | F - Tax | $1,096.63 | -54.5K | 183.3K | -23% | -$59.81M | |
| 2025-10-31 | 2025-10-30 | MPWR | Hsing Michael | CEO, Dir | F - Tax | $1,096.63 | -121.9K | 995.7K | -11% | -$133.70M | |
| 2025-10-31 | 2025-10-30 | MPWR | Tseng Saria | EVP, GC | F - Tax | $1,096.63 | -54.5K | 207.3K | -21% | -$59.81M | |
| 2025-10-28 | 2025-10-25 | MPWR | Hsing Michael | CEO, Dir | A - Grant | $0.00 | +302.9K | 1.12M | +37% | $0 | |
| 2025-10-28 | 2025-10-25 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | A - Grant | $0.00 | +135.5K | 237.8K | +132% | $0 | |
| 2025-10-28 | 2025-10-25 | MPWR | Xiao Deming | EVP, Gbl Ops | A - Grant | $0.00 | +135.5K | 256.2K | +112% | $0 | |
| 2025-10-28 | 2025-10-25 | MPWR | Tseng Saria | EVP, GC | A - Grant | $0.00 | +135.5K | 261.9K | +107% | $0 | |
| 2025-10-28 | 2025-10-25 | MPWR | BLEGEN THEODORE | EVP, CFO | A - Grant | $0.00 | +87.7K | 125.6K | +231% | $0 | |
| 2025-10-24 | 2025-10-24 | MPWR | Tseng Saria | EVP, GC | S - Sale | $1,087.62 | -1,300 | 126.4K | -1% | -$1.41M | |
| M | 2025-10-17 | 2025-10-15+ | MPWR | Tseng Saria | EVP, GC | S - Sale | $1,017.77 | -16.8K | 127.7K | -12% | -$17.14M |
| M | 2025-10-01 | 2025-10-01 | MPWR | BLEGEN THEODORE | EVP, CFO | S - Sale | $913.22 | -3,000 | 40.8K | -7% | -$2.74M |
| 2025-09-23 | 2025-09-18 | MPWR | Tseng Saria | EVP, GC | S - Sale | $914.45 | -14.5K | 144.5K | -9% | -$13.27M | |
| 2025-09-23 | 2025-09-18 | MPWR | Martinez Carintia | Dir | S - Sale | $900.00 | -1,400 | 878 | -61% | -$1.26M | |
| M | 2025-09-03 | 2025-09-02 | MPWR | BLEGEN THEODORE | EVP, CFO | S - Sale | $814.34 | -3,000 | 43.4K | -6% | -$2.44M |
| M | 2025-09-02 | 2025-08-29 | MPWR | Elmiger Eugen J | Dir | S - Sale | $846.71 | -4,000 | 18.1K | -18% | -$3.39M |
| 2025-08-28 | 2025-08-27 | MPWR | Zhou Jeff | Dir | S - Sale | $870.00 | -193 | 5,611 | -3% | -$167.9K | |
| MI | 2025-08-21 | 2025-08-19 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | G - Gift | $0.00 | -1,000 | 12.2K | -8% | $0 |
| M | 2025-08-18 | 2025-08-15 | MPWR | Hsing Michael | CEO, Dir | S - Sale | $829.10 | -20.2K | 819.3K | -2% | -$16.77M |
| 2025-08-15 | 2025-08-13 | MPWR | Zhou Jeff | Dir | S - Sale | $850.00 | -400 | 5,804 | -6% | -$340.0K |
Purchase Sale Sale after option exercise All abbreviations