CIK 0001280452 · Large accelerated filer
MONOLITHIC POWER SYSTEMS, INC.
Sign in to watch- Ticker
- 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 |
|---|---|---|---|---|---|---|
| 2025-05-12 | CHANG KUO WEI HERBERT Director | Sale | −100 | $698.00 | $70K | 676 |
| 2025-05-12 | Sciammas Maurice EVP, WW Sales & Marketing | Sale 10b5-1 | −12,000 | $701.00 | $8.4M | 4,015 |
| 2025-05-09 | Sciammas Maurice EVP, WW Sales & Marketing | Gift | −1,878 | 17,226 | ||
| 2025-05-09 | Sciammas Maurice EVP, WW Sales & Marketing | Gift | +1,878 | 40,094 | ||
| 2025-05-08 | CHANG KUO WEI HERBERT Director | Sale | −100 | $650.00 | $65K | 776 |
| 2025-02-18 | Sciammas Maurice EVP, WW Sales & Marketing | Gift | −1,102 | 19,104 | ||
| 2025-02-18 | Sciammas Maurice EVP, WW Sales & Marketing | Gift | +1,102 | 38,216 | ||
| 2025-02-18 | Hsing Michael CEO | Sale 10b5-1 | −5,200 | $700.00 | $3.6M | 834,898 |
| 2025-02-11 | Sciammas Maurice EVP, WW Sales & Marketing | Gift | −2,525 | 10,899 | ||
| 2025-02-11 | Sciammas Maurice EVP, WW Sales & Marketing | Gift | −2,525 | 10,899 | ||
| 2025-02-11 | Sciammas Maurice EVP, WW Sales & Marketing | Gift | +5,050 | 37,114 | ||
| 2025-02-10 | Xiao Deming EVP, Global Operations | Sale | −662 | $717.10 | $475K | 161,577 |
| 2025-02-10 | Tseng Saria EVP & General Counsel | Sale | −663 | $717.10 | $475K | 158,977 |
| 2025-02-10 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −662 | $717.10 | $475K | 102,301 |
| 2025-02-10 | Hsing Michael CEO | Sale | −2,594 | $717.10 | $1.9M | 840,071 |
| 2025-02-10 | BLEGEN THEODORE EVP and CFO | Sale | −532 | $717.10 | $381K | 52,912 |
| 2025-02-07 | Hsing Michael CEO | Sale 10b5-1 | −11,964 | $700.00 | $8.4M | 842,665 |
| 2025-02-07 | Sciammas Maurice EVP, WW Sales & Marketing | Sale 10b5-1 | −3,941 | $701.03 | $2.8M | 19,074 |
| 2025-02-07 | Sciammas Maurice EVP, WW Sales & Marketing | Sale 10b5-1 | −1,600 | $702.46 | $1.1M | 17,474 |
| 2025-02-07 | Sciammas Maurice EVP, WW Sales & Marketing | Sale 10b5-1 | −1,259 | $703.88 | $886K | 16,215 |
Page 22 of 59 · 1,177 trades