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 |
|---|---|---|---|---|---|---|
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −1,854 | $878.55 | $1.6M | 171,071 |
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −1,966 | $879.54 | $1.7M | 169,105 |
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −3,776 | $880.58 | $3.3M | 165,329 |
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −2,469 | $881.42 | $2.2M | 162,860 |
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −3,344 | $882.51 | $3.0M | 159,516 |
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −6,513 | $883.50 | $5.8M | 153,003 |
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −2,149 | $884.44 | $1.9M | 150,854 |
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −1,738 | $885.10 | $1.5M | 149,116 |
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −810 | $886.01 | $718K | 148,306 |
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −240 | $862.58 | $207K | 183,066 |
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −160 | $863.86 | $138K | 182,906 |
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −40 | $865.89 | $35K | 182,866 |
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −339 | $866.19 | $294K | 182,527 |
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −699 | $867.57 | $606K | 181,828 |
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −723 | $868.42 | $628K | 181,105 |
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −1,842 | $869.39 | $1.6M | 179,263 |
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −320 | $870.36 | $279K | 178,943 |
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −220 | $871.45 | $192K | 178,723 |
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −574 | $872.80 | $501K | 178,149 |
| 2025-11-19 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −1,146 | $873.78 | $1.0M | 177,003 |
Page 14 of 59 · 1,177 trades