sellNotable cluster of 7

Eugen J Elmiger sold $19M of MPWR

director at MONOLITHIC POWER SYSTEMS INC. 12,000 shares at an average of $1,584.96, traded May 6, 2026, filed May 8, 2026.

Warning score

Value

$19M

12,000 shares

Holdings after

5,402

-69% from before

From 52-week low

+167%

low $616.44, close $1,647.40

From 52-week high

high $1,647.40, as of May 6, 2026

Score components

Role
Director
+15
Trade size
$19.0M at market
+25
Share of holdings sold
Sold 69% of holdings
+20
Cluster
7 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 -7.5%, 3m -12.3%, 6m -.

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 9, 2026 · close 1,386

Since filing May 8, 2026: -13.1%SPY +6.0% · excess -19.2%

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 0001214659-26-005860, as filed. Open on EDGAR

Date	Transaction	Shares	Price	Value	Holdings after	Filed
May 6, 2026	SOpen-market sale Common Stock	-320	$1,559.88	$499k	17,082	May 8, 2026
May 6, 2026	SOpen-market sale Common Stock	-814	$1,566.36	$1.3M	16,268	May 8, 2026
May 6, 2026	SOpen-market sale Common Stock	-1,078	$1,571.58	$1.7M	15,190	May 8, 2026
May 6, 2026	SOpen-market sale Common Stock	-834	$1,575.57	$1.3M	14,356	May 8, 2026
May 6, 2026	SOpen-market sale Common Stock	-1,879	$1,581.81	$3.0M	12,477	May 8, 2026
May 6, 2026	SOpen-market sale Common Stock	-2,587	$1,586.81	$4.1M	9,890	May 8, 2026
May 6, 2026	SOpen-market sale Common Stock	-1,355	$1,591.38	$2.2M	8,535	May 8, 2026
May 6, 2026	SOpen-market sale Common Stock	-2,619	$1,596.42	$4.2M	5,916	May 8, 2026
May 6, 2026	SOpen-market sale Common Stock	-514	$1,600.14	$822k	5,402	May 8, 2026

Related signals

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

Score	Company	Insider	Value	Holdings	Filed
30Weak	MPWRsell10b5-1 MONOLITHIC POWER SYSTEMS INC	Michael Hsing CEO	$40M 30,000 shares	-4%	13 d ago
36Weak	MPWRsell 2 MONOLITHIC POWER SYSTEMS INC	Robert W Dean II Interim CFO	$42k 32 shares	-0%	Aug 26, 2026
31Weak	MPWRsell 2 MONOLITHIC POWER SYSTEMS INC	Kuo Wei Herbert Chang director	$64k 50 shares	-9%	Aug 25, 2026
37Weak	MPWRsell 3 MONOLITHIC POWER SYSTEMS INC	Robert W Dean II Interim CFO	$8,482 6 shares	-0%	Aug 19, 2026
38Weak	MPWRsell 3 MONOLITHIC POWER SYSTEMS INC	Kuo Wei Herbert Chang director	$71k 50 shares	-8%	Aug 13, 2026
48Moderate	MPWRsell 3 MONOLITHIC POWER SYSTEMS INC	Robert W Dean II Interim CFO	$141k 105 shares	-1%	Aug 6, 2026
16Weak	MPWRsell 310b5-1 MONOLITHIC POWER SYSTEMS INC	Maurice Sciammas EVP, WW Sales & Marketing	$40k 30 shares	-3%	Aug 5, 2026
20Weak	MPWRsell10b5-1 MONOLITHIC POWER SYSTEMS INC	Maurice Sciammas EVP, WW Sales & Marketing	$20M 15,000 shares	-9%	Jul 17, 2026
1Weak	MPWRsell10b5-1 MONOLITHIC POWER SYSTEMS INC	Maurice Sciammas EVP, WW Sales & Marketing	$41k 30 shares	-3%	Jul 6, 2026
16Weak	MPWRsell 510b5-1 MONOLITHIC POWER SYSTEMS INC	Maurice Sciammas EVP, WW Sales & Marketing	$46k 30 shares	-2%	Jun 3, 2026

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.