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 |
|---|---|---|---|---|---|---|
| 2025-11-12 | Hsing Michael CEO | Sale | −633 | $979.59 | $620K | 919,656 |
| 2025-11-12 | Hsing Michael CEO | Sale | −987 | $980.06 | $967K | 918,669 |
| 2025-11-11 | Hsing Michael CEO | Sale | −80 | $951.69 | $76K | 995,589 |
| 2025-11-11 | Hsing Michael CEO | Sale | −1,516 | $952.62 | $1.4M | 994,073 |
| 2025-11-11 | Hsing Michael CEO | Sale | −2,927 | $953.69 | $2.8M | 991,146 |
| 2025-11-11 | Hsing Michael CEO | Sale | −7,934 | $954.61 | $7.6M | 983,212 |
| 2025-11-11 | Hsing Michael CEO | Sale | −4,056 | $955.46 | $3.9M | 979,156 |
| 2025-11-11 | Hsing Michael CEO | Sale | −797 | $956.50 | $762K | 978,359 |
| 2025-11-11 | Hsing Michael CEO | Sale | −1,020 | $957.71 | $977K | 977,339 |
| 2025-11-11 | Hsing Michael CEO | Sale | −2,500 | $958.59 | $2.4M | 974,839 |
| 2025-11-11 | Hsing Michael CEO | Sale | −4,010 | $959.45 | $3.8M | 970,829 |
| 2025-11-11 | Hsing Michael CEO | Sale | −2,734 | $960.45 | $2.6M | 968,095 |
| 2025-11-11 | Hsing Michael CEO | Sale | −3,900 | $961.47 | $3.7M | 964,195 |
| 2025-11-11 | Hsing Michael CEO | Sale | −4,172 | $962.57 | $4.0M | 960,023 |
| 2025-11-11 | Hsing Michael CEO | Sale | −1,894 | $963.41 | $1.8M | 958,129 |
| 2025-11-11 | Hsing Michael CEO | Sale | −739 | $964.38 | $713K | 957,390 |
| 2025-11-11 | Hsing Michael CEO | Sale | −321 | $965.44 | $310K | 957,069 |
| 2025-11-11 | Hsing Michael CEO | Sale | −1,246 | $966.30 | $1.2M | 955,823 |
| 2025-11-11 | Hsing Michael CEO | Sale | −154 | $967.15 | $149K | 955,669 |
| 2025-11-05 | Sciammas Maurice EVP, WW Sales & Marketing | Sale | −200 | $986.81 | $197K | 1,299 |
Page 16 of 59 · 1,177 trades