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 |
|---|---|---|---|---|---|---|
| 2025-09-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −574 | $816.47 | $469K | 41,565 |
| 2025-09-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −100 | $818.44 | $82K | 41,465 |
| 2025-09-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −200 | $820.70 | $164K | 41,265 |
| 2025-09-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −200 | $821.75 | $164K | 41,065 |
| 2025-09-02 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −126 | $822.59 | $104K | 40,939 |
| 2025-08-29 | Elmiger Eugen J Director | Sale | −800 | $844.25 | $675K | 20,413 |
| 2025-08-29 | Elmiger Eugen J Director | Sale | −700 | $845.54 | $592K | 19,713 |
| 2025-08-29 | Elmiger Eugen J Director | Sale | −700 | $846.66 | $593K | 19,013 |
| 2025-08-29 | Elmiger Eugen J Director | Sale | −900 | $847.30 | $763K | 18,113 |
| 2025-08-29 | Elmiger Eugen J Director | Sale | −100 | $848.03 | $85K | 18,013 |
| 2025-08-29 | Elmiger Eugen J Director | Sale | −800 | $849.41 | $680K | 17,213 |
| 2025-08-27 | Zhou Jeff Director | Sale | −193 | $870.00 | $168K | 5,611 |
| 2025-08-19 | Sciammas Maurice EVP, WW Sales & Marketing | Gift | −1,000 | 1,000 | ||
| 2025-08-19 | Sciammas Maurice EVP, WW Sales & Marketing | Gift | −1,499 | 12,228 | ||
| 2025-08-19 | Sciammas Maurice EVP, WW Sales & Marketing | Gift | +1,499 | 1,499 | ||
| 2025-08-15 | Hsing Michael CEO | Sale | −2,603 | $825.69 | $2.1M | 832,295 |
| 2025-08-15 | Hsing Michael CEO | Sale | −2,555 | $826.64 | $2.1M | 829,740 |
| 2025-08-15 | Hsing Michael CEO | Sale | −3,878 | $827.72 | $3.2M | 825,862 |
| 2025-08-15 | Hsing Michael CEO | Sale | −396 | $828.64 | $328K | 825,466 |
| 2025-08-15 | Hsing Michael CEO | Sale | −4,101 | $829.45 | $3.4M | 821,365 |
Page 20 of 59 · 1,177 trades