MPWR
Insider TradingMonolithic Power Systems
Information Technology / Semiconductors
Recent Insider Transactions
Source: SEC Form 4 filings. Updated daily. Transaction codes: P = Open-Market Purchase, S = Open-Market Sale, F = Tax Withholding, A = Award, M = Option Exercise.
| Date | Reporter | Type | Shares | Price | Total Value |
|---|---|---|---|---|---|
| May 28, 2026 | DEAN ROBERT W II Interim CFO | SOpen-Market Sale | 22 | $2K | $36K |
| May 27, 2026 | Zhou Jeff | SOpen-Market Sale | 486 | $2K | $816K |
| May 27, 2026 | Tseng Saria EVP & General Counsel | GG | 200 | $0.00 | $0.00 |
| May 20, 2026 | DEAN ROBERT W II Interim CFO | SOpen-Market Sale | 4 | $2K | $6K |
| May 20, 2026 | Hsing Michael CEO | SOpen-Market Sale | 40,000 | $1K | $59.3M |
| May 19, 2026 | Sciammas Maurice EVP, WW Sales & Marketing | SOpen-Market Sale10b5-1 | 12,000 | $2K | $18.7M |
| May 15, 2026 | DEAN ROBERT W II Interim CFO | JJ | 2,156 | $0.00 | $0.00 |
| May 15, 2026 | Sciammas Maurice EVP, WW Sales & Marketing | GG | 3,126 | $0.00 | $0.00 |
| May 8, 2026 | Elmiger Eugen J | SOpen-Market Sale | 12,000 | $2K | $19.0M |
| May 8, 2026 | Wynne Eileen | SOpen-Market Sale | 335 | $2K | $530K |
| May 8, 2026 | Xiao Deming EVP, Global Operations | SOpen-Market Sale | 30,000 | $2K | $49.6M |
| May 6, 2026 | Zhou Jeff | SOpen-Market Sale | 1,514 | $2K | $2.4M |
| May 6, 2026 | Sciammas Maurice EVP, WW Sales & Marketing | SOpen-Market Sale10b5-1 | 30 | $2K | $48K |
| May 6, 2026 | Sciammas Maurice EVP, WW Sales & Marketing | SOpen-Market Sale | 380 | $2K | $602K |
| Apr 10, 2026 | Tseng Saria EVP & General Counsel | SOpen-Market Sale10b5-1 | 8,963 | $1K | $11.7M |
| Apr 8, 2026 | Tseng Saria EVP & General Counsel | SOpen-Market Sale10b5-1 | 7,636 | $1K | $8.9M |
| Apr 1, 2026 | Tseng Saria EVP & General Counsel | SOpen-Market Sale10b5-1 | 25,674 | $1K | $25.9M |
| Mar 24, 2026 | Sciammas Maurice EVP, WW Sales & Marketing | SOpen-Market Sale10b5-1 | 30 | $1K | $33K |
Planned Sales (Form 144)
Form 144 filings signal an insider's intent to sell restricted or control securities. These are plans, not completed transactions.
| Filed | Filer | Shares to Sell | Market Value | Approx. Sale Date | Broker |
|---|---|---|---|---|---|
| May 28, 2026 | SARIA TSENG | 7,565 | $12.9M | May 27, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| May 26, 2026 | JEFF ZHOU | 486 | $816K | May 26, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| May 26, 2026 | DEAN ROBERT W II | 22 | $36K | May 26, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| May 22, 2026 | SARIA TSENG | 5,000 | $7.9M | May 22, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services |
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