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 |
|---|---|---|---|---|---|---|
| 2026-02-11 | Hsing Michael CEO | Sale 10b5-1 | −1,987 | $1,172.92 | $2.3M | 948,985 |
| 2026-02-11 | Hsing Michael CEO | Sale 10b5-1 | −2,799 | $1,177.67 | $3.3M | 946,186 |
| 2026-02-11 | Hsing Michael CEO | Sale 10b5-1 | −1,542 | $1,182.82 | $1.8M | 944,644 |
| 2026-02-11 | Hsing Michael CEO | Sale 10b5-1 | −2,104 | $1,188.17 | $2.5M | 942,540 |
| 2026-02-11 | Hsing Michael CEO | Sale 10b5-1 | −6,079 | $1,192.67 | $7.3M | 936,461 |
| 2026-02-11 | Hsing Michael CEO | Sale 10b5-1 | −14,578 | $1,197.20 | $17.5M | 921,883 |
| 2026-02-11 | Hsing Michael CEO | Sale 10b5-1 | −649 | $1,202.28 | $780K | 921,234 |
| 2026-02-11 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −200 | $1,179.98 | $236K | 1,299 |
| 2026-02-10 | Hsing Michael CEO | Sale 10b5-1 | −4,302 | $1,132.01 | $4.9M | 983,932 |
| 2026-02-10 | Hsing Michael CEO | Sale 10b5-1 | −6,325 | $1,136.75 | $7.2M | 977,607 |
| 2026-02-10 | Hsing Michael CEO | Sale 10b5-1 | −16,080 | $1,141.88 | $18.4M | 961,527 |
| 2026-02-10 | Hsing Michael CEO | Sale 10b5-1 | −3,864 | $1,145.90 | $4.4M | 957,663 |
| 2026-02-10 | Hsing Michael CEO | Sale 10b5-1 | −1,215 | $1,151.11 | $1.4M | 956,448 |
| 2026-02-10 | Hsing Michael CEO | Sale 10b5-1 | −694 | $1,154.96 | $802K | 955,754 |
| 2026-02-10 | Hsing Michael CEO | Sale 10b5-1 | −360 | $1,161.41 | $418K | 955,394 |
| 2026-02-10 | Hsing Michael CEO | Sale 10b5-1 | −880 | $1,176.04 | $1.0M | 954,514 |
| 2026-02-10 | Hsing Michael CEO | Sale 10b5-1 | −280 | $1,197.26 | $335K | 954,234 |
| 2026-02-09 | Lee Victor K Director | Sale 10b5-1 | −400 | $1,212.16 | $485K | 27,756 |
| 2026-02-06 | Xiao Deming EVP, Global Operations | Sale | −22,875 | $1,171.16 | $26.8M | 235,932 |
| 2026-02-06 | Tseng Saria EVP & General Counsel | Sale | −22,875 | $1,171.16 | $26.8M | 200,626 |
Page 8 of 59 · 1,177 trades