Insider Cluster (4 insiders) ·Filed Jun 3, 2026

MPWR

MONOLITHIC POWER SYSTEMS INC
NEUTRAL
Impact 2/10
Horizondays Processed4mo ago
Insider cluster: 4 insiders, $13.8M total
Actionable Insight • Neutral

This cluster is routine and non-informative. The $12.86M sale by EVP Tseng is large in absolute terms but negligible relative to the $79.8B market cap. No bearish signal — treat as noise. Monitor next 10-Q for any fundamental changes, but no action warranted.

DirectionNeutral
Confidencehigh
Horizondays
Final — all horizons settled through T+60d
MPWR ▼ -24.19% at T+60d
NEUTRAL call ✗ call lost -24.19% · α vs SPY -25.81% · entry $1,650.98 → $1,251.58
Entry anchored
Jun 3, 2026
via day open
T+1d
-10.56%
call -10.56% · α -7.97%
$1,476.57
settled 4mo ago
T+5d
-3.72%
call -3.72% · α -1.17%
$1,589.55
settled 4mo ago
T+20d
-21.98%
call -21.98% · α -20.35%
$1,288.16
settled 3mo ago
T+60d
-24.19%
call -24.19% · α -25.81%
$1,251.58
settled 5w ago

Price Chart

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Executive Summary

Four MPWR insiders sold a total of $13.76M in open-market sales over a 7-day window, led by EVP & General Counsel Tseng Saria ($12.86M). The cluster is dominated by a single large sale from a senior executive, with three smaller sales from other insiders. At 0.017% of the $79.8B market cap, the total value is trivial and does not indicate material insider concern.

Key Financial Metrics

Direction
selling
Total Value
$13.8M
Insiders
4

Key Facts

  • Four insiders sold shares totaling $13.76M in a 7-day window (May 25–June 1, 2026)
  • EVP & General Counsel Tseng Saria sold $12.86M (7.6K shares at $1,700), representing 93% of the cluster value
  • Three other insiders sold small amounts: EVP Sciammas $46K, Interim CFO Dean $36K, Director Zhou $816K
  • Total cluster value is 0.017% of MPWR's $79.8B market cap — well below the 0.1% materiality threshold
  • All trades are open-market sales (code S); no purchases in the cluster
  • Prior 30-day insider activity: 8 sells totaling $32.5M, consistent with routine selling pattern

Financial Impact

Total insider sales of $13.76M represent 0.017% of market cap — immaterial

insider ownershipfloat

Risk Factors

  • Insider selling at elevated levels could indicate personal diversification, not fundamental concern
  • No purchases in the cluster — consistent with typical executive selling patterns

Market Snapshot

Exchange
Nasdaq
Sector
Semiconductors & Related Devices
Analyst Consensus
88% bullish (25 analysts)

Investment Themes

Semiconductors

Documents Analyzed

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

DocumentAccession Number
CLUSTER Data (Synthetic)cluster-MPWR-1780522337889
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

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Report published Jun 3, 2026