Insider selling is routine and tiny relative to market cap — no directional signal. Monitor for any change in selling velocity or emergence of open-market insider buying, which would be a more informative signal per academic literature.
Price Chart
Executive Summary
Four MPWR insiders, including CEO Michael Hsing and EVP Saria Tseng, sold a total of $18.75M in open-market transactions over the past week. The sales represent ~0.023% of the company's $81.7B market cap, well below the 0.1% threshold for materiality. This cluster is likely driven by routine portfolio diversification or 10b5-1 plans, especially given the existing pattern of insider selling (7 sells totaling $20.6M in the past 30 days). No bearish signal is warranted.
Key Financial Metrics
Key Facts
- CEO Michael Hsing sold 3,400 shares for $5.01M on 2026-05-18 at ~$1,462.61/share.
- EVP & General Counsel Saria Tseng sold 5,000 shares for $7.93M on 2026-05-22 at ~$1,586.43/share.
- EVP WW Sales & Marketing Maurice Sciammas sold 3,700 shares for $5.80M on 2026-05-15.
- Interim CFO Robert W. Dean II sold 4 shares for $6K on 2026-05-18.
- Total cluster value ($18.75M) is ~0.023% of MPWR's $81.7B market cap — well below the 0.1% materiality threshold.
- Prior 30-day insider activity showed 7 sells totaling $20.6M, consistent with routine selling patterns.
Financial Impact
$18.75M in total insider sales, negligible relative to $81.7B market cap
Risk Factors
- Insider selling could accelerate if fundamental headwinds emerge, but current activity is noise.
- No evidence of 10b5-1 plan disclosures, but the pattern is consistent with scheduled selling.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-MPWR-1779916061038 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 10, 2026 21d ago | Press Release | $1,234.46 $1,217.80 | ▼ −1.35% | ▼ −1.13% | $1,427.84 (+15.67%) |
Aug 26, 2026 5w ago | Insider Cluster | $1,311.08 $1,213.65 | ▼ −7.43% | ▼ −7.70% | $1,427.84 (+8.91%) |
Aug 26, 2026 5w ago | Insider Cluster | $1,311.08 $1,219.36 | ▼ −7.00% | ▼ −6.23% | $1,427.84 (+8.91%) |
Aug 24, 2026 5w ago | Court Ruling | $1,285.03 $1,261.99 | ▼ −1.79% | ▼ −2.26% | $1,427.84 (+11.11%) |
Aug 13, 2026 7w ago | Insider Cluster | $1,362.55 $1,310.60 | ▼ −3.81% | ▼ −1.85% | $1,427.84 (+4.79%) |
Aug 6, 2026 8w ago | Insider Cluster | $1,350.21 $1,358.05 | ▲ +0.58% | ▼ −0.63% | $1,427.84 (+5.75%) |
Jul 30, 2026 9w ago | 8-K | $1,426.03 $1,391.91 | ▼ −2.39% | ▼ −5.90% | $1,427.84 (+0.13%) |
Jun 12, 2026 15w ago | Press Release | $1,652.29 $1,537.88 | ▼ −6.92% | ▼ −5.54% | $1,427.84 (−13.58%) |
Jun 3, 2026 17w ago | Insider Cluster | $1,650.98 $1,589.55 | ▼ −3.72% | ▼ −1.17% | $1,427.84 (−13.52%) |
May 29, 2026 17w ago | Insider Cluster | $1,537.90 $1,481.05 | ▼ −3.70% | ▼ −0.95% | $1,427.84 (−7.16%) |
US Market Status
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