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 | −731 | $874.50 | $639K | 176,272 |
| 2025-11-13 | Sciammas Maurice EVP, WW Sales & Marketing | Gift | −4,530 | 26,660 | ||
| 2025-11-13 | Sciammas Maurice EVP, WW Sales & Marketing | Gift | +4,530 | 49,460 | ||
| 2025-11-12 | Hsing Michael CEO | Sale | −403 | $957.58 | $386K | 955,266 |
| 2025-11-12 | Hsing Michael CEO | Sale | −2,799 | $958.34 | $2.7M | 952,467 |
| 2025-11-12 | Hsing Michael CEO | Sale | −440 | $959.36 | $422K | 952,027 |
| 2025-11-12 | Hsing Michael CEO | Sale | −403 | $960.45 | $387K | 951,624 |
| 2025-11-12 | Hsing Michael CEO | Sale | −1,904 | $961.63 | $1.8M | 949,720 |
| 2025-11-12 | Hsing Michael CEO | Sale | −2,817 | $962.61 | $2.7M | 946,903 |
| 2025-11-12 | Hsing Michael CEO | Sale | −3,552 | $963.47 | $3.4M | 943,351 |
| 2025-11-12 | Hsing Michael CEO | Sale | −3,264 | $964.47 | $3.1M | 940,087 |
| 2025-11-12 | Hsing Michael CEO | Sale | −5,619 | $965.50 | $5.4M | 934,468 |
| 2025-11-12 | Hsing Michael CEO | Sale | −6,562 | $966.45 | $6.3M | 927,906 |
| 2025-11-12 | Hsing Michael CEO | Sale | −3,024 | $967.41 | $2.9M | 924,882 |
| 2025-11-12 | Hsing Michael CEO | Sale | −2,072 | $968.37 | $2.0M | 922,810 |
| 2025-11-12 | Hsing Michael CEO | Sale | −975 | $969.62 | $945K | 921,835 |
| 2025-11-12 | Hsing Michael CEO | Sale | −728 | $970.29 | $706K | 921,107 |
| 2025-11-12 | Hsing Michael CEO | Sale | −59 | $971.81 | $57K | 921,048 |
| 2025-11-12 | Hsing Michael CEO | Sale | −461 | $972.78 | $448K | 920,587 |
| 2025-11-12 | Hsing Michael CEO | Sale | −298 | $973.73 | $290K | 920,289 |
Page 15 of 59 · 1,177 trades