MPWR MONOLITHIC POWER SYSTEMS INC
Price Chart
Executive Summary
Four MPWR insiders sold a total of $7.34M in stock over a one-week window, led by EVP Xiao Deming ($5.49M). The sales represent ~0.009% of the $79.3B market cap, a trivial amount. No open-market purchases occurred; the only non-cash event was a $0 grant to the interim CFO. The cluster is routine in size and pattern, with no bearish signal.
Key Financial Metrics
Actionable Insight
The $7.34M insider selling cluster is trivial relative to MPWR's $79.3B market cap and consistent with routine diversification/vesting patterns. No bearish signal. Monitor for any material change in insider behavior (e.g., a C-suite cluster buy or a sudden increase in sale volume >0.5% of market cap) before adjusting position.
Key Facts
- Total insider sales of $7.34M represent ~0.009% of MPWR's $79.3B market cap
- EVP Xiao Deming sold $5.49M (3,300 shares at $1,648.38) — largest trade in the cluster
- Three directors sold smaller amounts: Zhou Jeff ($825K), Elmiger Eugen J ($499K), Wynne Eileen ($530K)
- Interim CFO Dean Robert W II received 2,156 shares via non-cash grant ($0 value)
- No open-market purchases in the cluster; net direction is selling
- Prior 30-day insider activity: 7 sells totaling $8.8M — consistent pattern of routine sales
Financial Impact
Total insider sales of $7.34M, or ~0.009% of market cap — immaterial relative to company size
Risk Factors
- Insider sales could accelerate if management sees headwinds, but current cluster is too small to indicate informed selling
- Historical calibration shows score-6+ reports on this segment have negative net alpha at T+20, but this filing's trivial size does not warrant an elevated score
Market Snapshot
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-MPWR-1778876534108 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
|
Jun 12, 2026
2d ago
|
Press Release
| $1,576.88 awaiting T+1 | awaiting T+1 | — | $1,577.32 (+0.03%) |
|
Jun 3, 2026
11d ago
|
Insider Cluster
| $1,650.98 $1,476.57 | ▼ −10.56% | ▼ −7.97% | $1,577.32 (−4.46%) |
|
May 29, 2026
16d ago
|
Insider Cluster
| $1,537.90 $1,625.47 | ▲ +5.69% | ▲ +5.55% | $1,577.32 (+2.56%) |
|
May 29, 2026
16d ago
|
Insider Cluster
| $1,537.90 $1,625.47 | ▲ +5.69% | ▲ +5.55% | $1,577.32 (+2.56%) |
|
May 28, 2026
17d ago
|
Insider Cluster
| $1,562.07 $1,537.90 | ▼ −1.55% | ▼ −1.81% | $1,577.32 (+0.98%) |
|
May 27, 2026
18d ago
|
Insider Cluster
| $1,632.36 $1,562.07 | ▼ −4.31% | ▼ −4.55% | $1,577.32 (−3.37%) |
|
May 27, 2026
18d ago
|
Insider Cluster
| $1,632.36 $1,562.07 | ▼ −4.31% | ▼ −4.55% | $1,577.32 (−3.37%) |
|
May 21, 2026
25d ago
|
Insider Cluster
| $1,553.55 $1,588.88 | ▲ +2.27% | ▲ +1.83% | $1,577.32 (+1.53%) |
|
May 20, 2026
25d ago
|
Insider Cluster
| $1,553.55 $1,588.88 | ▲ +2.27% | ▲ +1.83% | $1,577.32 (+1.53%) |
|
May 8, 2026
5w ago
|
Insider Cluster
| $1,653.69 $1,592.75 | ▼ −3.69% | ▼ −3.55% | $1,577.32 (−4.62%) |
US Market Status
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