Insider Cluster (2 insiders) ·Filed Mar 30, 2026

MPWR

MONOLITHIC POWER SYSTEMS INC
NEUTRAL
Impact 3/10
Horizondays Processed6mo ago
Insider cluster: 2 insiders, $5.2M total
Actionable Insight • Neutral

The selling is minimal relative to company size and likely reflects personal portfolio management rather than negative sentiment. No immediate trading signal; monitor for larger or more concentrated selling patterns.

DirectionNeutral
Confidencehigh
Horizondays
Final — all horizons settled through T+60d
MPWR ▲ +43.19% at T+60d
NEUTRAL call ✓ call won +43.19% · α vs SPY +27.17% · entry $1,002.12 → $1,434.95
Entry anchored
Mar 27, 03:59 PM ET
via exchange tick
T+1d
+8.92%
call +8.92% · α +6.02%
$1,091.46
settled 6mo ago
T+5d
+18.41%
call +18.41% · α +14.11%
$1,186.58
settled 6mo ago
T+20d
+49.96%
call +49.96% · α +37.37%
$1,502.80
settled 5mo ago
T+60d
+43.19%
call +43.19% · α +27.17%
$1,434.95
settled 3mo ago

Price Chart

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Executive Summary

Two Monolithic Power executives sold shares in late March 2026, with General Counsel Saria Tseng selling $5.16M worth and EVP Maurice Sciammas selling $33K. The total insider selling of $5.19M represents less than 0.01% of the company's $54.9B market cap, indicating routine, non-material divestment.

Key Financial Metrics

Direction
selling
Total Value
$5.2M
Insiders
2

Key Facts

  • EVP & General Counsel Saria Tseng sold 5,154 shares for $5.16M on March 30, 2026.
  • EVP Maurice Sciammas sold 30 shares for $33,493 on April 1, 2026.
  • Both transactions were open-market sales (Form 4 codes: S).
  • Total cluster value: $5.19M, representing ~0.01% of MPWR's $54.9B market cap.

Financial Impact

$5.19M in total open-market sales over 7 days

insider ownershipshare count

Risk Factors

  • Large individual sales by insiders could signal reduced confidence, though this level is not statistically significant.
  • Concentration of sales among C-suite executives, even small, may attract market attention despite low dollar impact.

Market Snapshot

Exchange
Nasdaq
Sector
Semiconductors & Related Devices

Investment Themes

Semiconductors

Documents Analyzed

This report is based on 1 SEC document filed with EDGAR.

DocumentAccession Number
CLUSTER Data (Synthetic)cluster-MPWR-1775246311576
30 reports for MPWR
Performance horizon
80% Hit rate 4 of 5 directional calls best @ T+20▲ +21.20%Apr 13, 2026
Filters
Rows
Reports for MPWR — sortable, filterable
TypeNow
Sep 10, 2026
21d ago
Press Release
NEUTRAL ★ 2/10
$1,234.46 $1,217.80▼ −1.35%▼ −1.13%$1,452.76 (+17.68%)
Aug 26, 2026
5w ago
Insider Cluster
NEUTRAL ★ 2/10
$1,311.08 $1,213.65▼ −7.43%▼ −7.70%$1,452.76 (+10.81%)
Aug 26, 2026
5w ago
Insider Cluster
NEUTRAL ★ 2/10
$1,311.08 $1,219.36▼ −7.00%▼ −6.23%$1,452.76 (+10.81%)
Aug 24, 2026
5w ago
Court Ruling
BULLISH ★ 6/10
$1,285.03 $1,261.99▼ −1.79%▼ −2.26%$1,452.76 (+13.05%)
Aug 13, 2026
7w ago
Insider Cluster
NEUTRAL ★ 2/10
$1,362.55 $1,310.60▼ −3.81%▼ −1.85%$1,452.76 (+6.62%)
Aug 6, 2026
8w ago
Insider Cluster
NEUTRAL ★ 3/10
$1,350.21 $1,358.05▲ +0.58%▼ −0.63%$1,452.76 (+7.60%)
Jul 30, 2026
9w ago
8-K
BULLISH ★ 8/10
$1,426.03 $1,391.91▼ −2.39%▼ −5.90%$1,452.76 (+1.87%)
Jun 12, 2026
15w ago
Press Release
NEUTRAL ★ 2/10
$1,652.29 $1,537.88▼ −6.92%▼ −5.54%$1,452.76 (−12.08%)
Jun 3, 2026
17w ago
Insider Cluster
NEUTRAL ★ 2/10
$1,650.98 $1,589.55▼ −3.72%▼ −1.17%$1,452.76 (−12.01%)
May 29, 2026
17w ago
Insider Cluster
NEUTRAL ★ 2/10
$1,537.90 $1,481.05▼ −3.70%▼ −0.95%$1,452.76 (−5.54%)
Showing 10 of 30

US Market Status

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Report published Apr 3, 2026