SEC Form 4Coverage since May 22, 2026
$MPWR insider trading
Over the last 12 months, Monolithic Power Systems insiders reported no purchases and 9 sales totaling $42.2M across SEC Form 4 filings. 44% of the activity was filed under pre-arranged 10b5-1 trading plans.
- Bought · 12m
- — 0 events
- Sold · 12m
- $42.2M 9 events
- Events · 12m
- 9 Form 4 filings, grouped
- Insiders · 12m
- 4 distinct reporters
- 10b5-1 share
- 44% pre-arranged plans
Side
Price · $MPWR · 12Mvia TradingView
Top insiders · 12m
Sciammas MauriceEVP, WW Sales & Marketing4× · $20.4M
DEAN ROBERT W IIInterim CFO2× · $177K
Tseng SariaEVP & General Counsel2× · $20.8M
Zhou Jeff—1× · $816K
All insider trades
9 events
| Date | Insider | Type | Shares | Avg price | Value | Δ stake | Marks |
|---|---|---|---|---|---|---|---|
| Aug 5, 2026 | DEAN ROBERT W IIInterim CFO · O | ▼ Sale | 105 | $1344.27 | $141K | -1.5% | — |
| Aug 3, 2026 | Sciammas MauriceEVP, WW Sales & Marketing · O | ▼ Sale | 30 | $1343.94 | $40K | -2.6% | plan · indirect |
| Jul 15, 2026 | Sciammas MauriceEVP, WW Sales & Marketing · O | ▼ Sale | 15,000 | $1349.73 | $20.2M | -9% | plan · 18 tranches |
| Jul 1, 2026 | Sciammas MauriceEVP, WW Sales & Marketing · O | ▼ Sale | 30 | $1351.61 | $41K | -2.5% | plan · indirect |
| Jun 1, 2026 | Sciammas MauriceEVP, WW Sales & Marketing · O | ▼ Sale | 30 | $1533.95 | $46K | -2.5% | plan · indirect |
| May 27, 2026 | Tseng SariaEVP & General Counsel · O | ▼ Sale | 7,565 | $1700 | $12.9M | -5% | — |
| May 26, 2026 | DEAN ROBERT W IIInterim CFO · O | ▼ Sale | 22 | $1649.56 | $36K | -0.4% | — |
| May 26, 2026 | Zhou JeffD | ▼ Sale | 486 | $1680 | $816K | -11.3% | — |
| May 22, 2026 | Tseng SariaEVP & General Counsel · O | ▼ Sale | 5,000 | $1586.43 | $7.9M | -3.2% | — |
About Form 4
Corporate insiders — officers, directors and 10%+ owners — must report their trades to the SEC on Form 4 within two business days. We group each filing's transactions into one economic event (a laddered 10b5-1 sale is one event, not 25 rows), flag pre-arranged plans and late filings, and link every event to its AI-scored article in the $MPWR feed.