CIK 0001280452 · Large accelerated filer
MONOLITHIC POWER SYSTEMS, INC.
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- MPWR
- Exchange
- Nasdaq
- Industry
- Semiconductors & Related Devices
- FY end
- Dec 31
- Incorporated
- DE
- Entity type
- operating
- EIN
- 770466789
- Phone
- 561-839-3999
- Business address
- 1555 PALM BEACH LAKES BLVD., WEST PALM BEACH, FL, 33401
- Former names
- MONOLITHIC POWER SYSTEMS INC
- Open-market buys, last 90 days
- $0
- in 0 filings
- Open-market sales, last 90 days
- $40,463,134
- in 4 filings, $40.3M under 10b5-1 plans
Net −$40,463,134. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.
Who's trading
90 days
Reading 100 more Form 4s from the SEC; this list fills in as they're read.
| Date | Insider | Transaction | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2025-11-25 | Tseng Saria EVP & General Counsel | Sale | −320 | $899.37 | $288K | 202,036 |
| 2025-11-25 | Tseng Saria EVP & General Counsel | Sale | −346 | $900.41 | $312K | 201,690 |
| 2025-11-25 | Tseng Saria EVP & General Counsel | Sale | −880 | $901.58 | $793K | 200,810 |
| 2025-11-25 | Tseng Saria EVP & General Counsel | Sale | −120 | $902.07 | $108K | 200,690 |
| 2025-11-25 | Tseng Saria EVP & General Counsel | Sale | −160 | $903.54 | $145K | 200,530 |
| 2025-11-25 | Tseng Saria EVP & General Counsel | Sale | −200 | $904.39 | $181K | 200,330 |
| 2025-11-25 | Tseng Saria EVP & General Counsel | Sale | −160 | $905.32 | $145K | 200,170 |
| 2025-11-25 | Tseng Saria EVP & General Counsel | Sale | −272 | $906.33 | $247K | 199,898 |
| 2025-11-25 | Tseng Saria EVP & General Counsel | Sale | −10,200 | $907.21 | $9.3M | 189,698 |
| 2025-11-25 | Tseng Saria EVP & General Counsel | Sale | −888 | $908.49 | $807K | 188,810 |
| 2025-11-25 | Tseng Saria EVP & General Counsel | Sale | −556 | $909.35 | $506K | 188,254 |
| 2025-11-25 | Tseng Saria EVP & General Counsel | Sale | −359 | $910.42 | $327K | 187,895 |
| 2025-11-25 | Tseng Saria EVP & General Counsel | Sale | −324 | $911.92 | $295K | 187,571 |
| 2025-11-25 | Tseng Saria EVP & General Counsel | Sale | −240 | $912.30 | $219K | 187,331 |
| 2025-11-25 | CHANG KUO WEI HERBERT Director | Sale | −100 | $896.97 | $90K | 426 |
| 2025-11-24 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −3,976 | $895.23 | $3.6M | 144,330 |
| 2025-11-21 | CHANG KUO WEI HERBERT Director | Sale | −100 | $873.97 | $87K | 526 |
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −431 | $875.26 | $377K | 175,841 |
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −940 | $876.62 | $824K | 174,901 |
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −1,976 | $877.45 | $1.7M | 172,925 |
Page 13 of 59 · 1,177 trades