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 |
|---|---|---|---|---|---|---|
| 2025-08-15 | Hsing Michael CEO | Sale | −2,100 | $830.46 | $1.7M | 819,265 |
| 2025-08-15 | Hsing Michael CEO | Sale | −1,953 | $831.57 | $1.6M | 817,312 |
| 2025-08-15 | Hsing Michael CEO | Sale | −1,510 | $832.57 | $1.3M | 815,802 |
| 2025-08-15 | Hsing Michael CEO | Sale | −535 | $833.37 | $446K | 815,267 |
| 2025-08-15 | Hsing Michael CEO | Sale | −200 | $834.92 | $167K | 815,067 |
| 2025-08-15 | Hsing Michael CEO | Sale | −400 | $836.40 | $335K | 814,667 |
| 2025-08-13 | Zhou Jeff Director | Sale | −400 | $850.00 | $340K | 5,804 |
| 2025-08-12 | Zhou Jeff Director | Sale | −200 | $830.00 | $166K | 6,204 |
| 2025-08-11 | Xiao Deming EVP, Global Operations | Gift | +945 | 4,336 | ||
| 2025-08-11 | Xiao Deming EVP, Global Operations | Gift | −945 | 120,660 | ||
| 2025-08-06 | Sciammas Maurice EVP, WW Sales & Marketing | Gift | +4,836 | 44,930 | ||
| 2025-08-06 | Sciammas Maurice EVP, WW Sales & Marketing | Gift | −2,000 | 13,727 | ||
| 2025-08-06 | Sciammas Maurice EVP, WW Sales & Marketing | Gift | −1,418 | 9,481 | ||
| 2025-08-06 | Sciammas Maurice EVP, WW Sales & Marketing | Gift | −1,418 | 9,481 | ||
| 2025-08-01 | Xiao Deming EVP, Global Operations | Sale 10b5-1 | −39,999 | $780.00 | $31.2M | 121,605 |
| 2025-08-01 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −3,000 | $750.00 | $2.3M | 43,939 |
| 2025-07-01 | BLEGEN THEODORE EVP and CFO | Sale 10b5-1 | −6,000 | $750.00 | $4.5M | 46,939 |
| 2025-05-28 | Sciammas Maurice EVP, WW Sales & Marketing | Gift | −1,499 | 15,727 | ||
| 2025-05-28 | Sciammas Maurice EVP, WW Sales & Marketing | Gift | +1,499 | 1,499 | ||
| 2025-05-13 | CHANG KUO WEI HERBERT Director | Sale | −50 | $738.00 | $37K | 626 |
Page 21 of 59 · 1,177 trades