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 |
|---|---|---|---|---|---|---|
| 2026-02-06 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −22,875 | $1,171.16 | $26.8M | 178,625 |
| 2026-02-06 | BLEGEN THEODORE EVP and CFO | Sale | −21,725 | $1,171.16 | $25.4M | 82,353 |
| 2026-02-06 | Hsing Michael CEO | Sale | −54,923 | $1,171.16 | $64.3M | 988,234 |
| 2026-02-03 | Wynne Eileen Director | Grant or award | +189 | 1,342 | ||
| 2026-02-03 | Zhou Jeff Director | Grant or award | +189 | 5,800 | ||
| 2026-02-03 | CHANG KUO WEI HERBERT Director | Grant or award | +189 | 615 | ||
| 2026-02-03 | Elmiger Eugen J Director | Grant or award | +189 | 17,402 | ||
| 2026-02-03 | Lee Victor K Director | Grant or award | +189 | 28,156 | ||
| 2026-02-03 | Martinez Carintia Director | Grant or award | +189 | 1,067 | ||
| 2026-02-03 | Xiao Deming EVP, Global Operations | Grant or award | +57,170 | 258,807 | ||
| 2026-02-03 | BLEGEN THEODORE EVP and CFO | Grant or award | +38,745 | 104,078 | ||
| 2026-02-03 | Tseng Saria EVP & General Counsel | Grant or award | +57,170 | 223,501 | ||
| 2026-02-03 | Hsing Michael CEO | Grant or award | +136,825 | 1,043,157 | ||
| 2026-02-03 | Sciammas Maurice EVP, WW Sales & Marketing | Grant or award | +57,170 | 201,500 | ||
| 2026-02-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −220 | $1,110.58 | $244K | 68,112 |
| 2026-02-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −40 | $1,117.11 | $45K | 68,072 |
| 2026-02-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −80 | $1,120.77 | $90K | 67,992 |
| 2026-02-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −40 | $1,122.56 | $45K | 67,952 |
| 2026-02-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −200 | $1,126.58 | $225K | 67,752 |
| 2026-02-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −80 | $1,127.39 | $90K | 67,672 |
Page 9 of 59 · 1,177 trades