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sellNotable cluster of 6

Maurice Sciammas sold $27M of MPWR

EVP, WW Sales & Marketing at MONOLITHIC POWER SYSTEMS INC. 22,875 shares at an average of $1,171.16, traded Feb 6, 2026, filed Feb 10, 2026.

Warning score
60
Value
$27M
22,875 shares
Holdings after
178,625
-11% from before
From 52-week low
+172%
low $450.40, close $1,223.69
From 52-week high
0%
high $1,223.69, as of Feb 6, 2026

Score components

  • Role
    Officer
    +15
  • Trade size
    $26.8M at market
    +25
  • Share of holdings sold
    Sold 11% of holdings
    +5
  • Cluster
    6 insiders selling within 14 days
    +15

What happened after comparable sells

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

This signal so far: 1m -9.5%, 3m +40.3%, 6m +23.2%.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

MPWROct 13, 2026 · close 1,320
Since filing Feb 10, 2026: +16.1%SPY +13.3% · excess +2.8%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0001214659-26-001449, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Feb 6, 2026SOpen-market sale
Common Stock
-22,875$1,171.16$27M178,625Feb 10, 2026

Related signals

Other insiders at MONOLITHIC POWER SYSTEMS INC and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
30Weak
MPWRsell10b5-1
MONOLITHIC POWER SYSTEMS INC
Michael Hsing
CEO
$40M
30,000 shares
-4%
36Weak
MPWRsell 2
MONOLITHIC POWER SYSTEMS INC
Robert W Dean II
Interim CFO
$42k
32 shares
-0%
31Weak
MPWRsell 2
MONOLITHIC POWER SYSTEMS INC
Kuo Wei Herbert Chang
director
$64k
50 shares
-9%
37Weak
MPWRsell 3
MONOLITHIC POWER SYSTEMS INC
Robert W Dean II
Interim CFO
$8,482
6 shares
-0%
38Weak
MPWRsell 3
MONOLITHIC POWER SYSTEMS INC
Kuo Wei Herbert Chang
director
$71k
50 shares
-8%
48Moderate
MPWRsell 3
MONOLITHIC POWER SYSTEMS INC
Robert W Dean II
Interim CFO
$141k
105 shares
-1%
16Weak
MPWRsell 310b5-1
MONOLITHIC POWER SYSTEMS INC
Maurice Sciammas
EVP, WW Sales & Marketing
$40k
30 shares
-3%
20Weak
MPWRsell10b5-1
MONOLITHIC POWER SYSTEMS INC
Maurice Sciammas
EVP, WW Sales & Marketing
$20M
15,000 shares
-9%
1Weak
MPWRsell10b5-1
MONOLITHIC POWER SYSTEMS INC
Maurice Sciammas
EVP, WW Sales & Marketing
$41k
30 shares
-3%
16Weak
MPWRsell 510b5-1
MONOLITHIC POWER SYSTEMS INC
Maurice Sciammas
EVP, WW Sales & Marketing
$46k
30 shares
-2%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

Maurice Sciammas sold $27M of MPWR | InsiderTell