The CEO's $6.68M open-market sale is the dominant signal in this cluster. While insider sales are typically liquidity-driven, the concentration of 5 out of 6 trades on Aug 6 suggests a coordinated window opening rather than independent bearish views. Monitor for any upcoming 8-K or earnings pre-announcement that could explain the timing. The historical calibration shows cluster sells at MGNI have not been reliable directional signals, so avoid over-interpreting this as a strong sell signal.
Price Chart
Executive Summary
Six Magnite insiders, including CEO Michael Barrett and CTO David Buonasera, sold a combined $9.35M in shares over a one-week window. The CEO's $6.68M sale dominates the cluster, representing ~0.19% of the $3.5B market cap. While insider sales are generally weak predictive signals, the CEO's large open-market sale at a price near the stock's recent range warrants attention, especially given the cluster's concentration around a single date (Aug 6). The historical calibration shows cluster sells at this company have not been reliable directional signals, but the CEO's participation elevates the signal modestly above a routine liquidity event.
Key Financial Metrics
Key Facts
- CEO Michael Barrett sold 294,000 shares for $6.68M on Aug 6, 2026
- Total insider selling cluster: $9.35M across 6 insiders over 8 days
- Sales represent ~0.27% of MGNI's $3.5B market cap
- Director Paul Caine sold 5,000 shares at $24.35 on Aug 10, the highest price in the cluster
- CTO David Buonasera sold a small 871-share position for $22K
Financial Impact
Total insider sales of $9.35M, or ~0.27% of market cap
Risk Factors
- CEO sale could signal peak valuation concerns or upcoming negative news
- Cluster timing around a single date suggests coordinated window opening, not independent bearish views
- Insider sales are generally weak predictors; this cluster may be routine diversification
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-MGNI-1786611775593 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 11, 2026 22d ago | Insider Cluster | $23.77 $23.84 | ▲ +0.29% | ▲ +0.74% | $25.44 (+7.03%) |
Sep 10, 2026 22d ago | Press Release | $23.55 $23.77 | ▲ +0.93% | ▲ +0.08% | $25.44 (+8.03%) |
Sep 10, 2026 23d ago | Insider Cluster | $23.55 $23.77 | ▲ +0.93% | ▲ +0.08% | $25.44 (+8.03%) |
Sep 3, 2026 4w ago | Insider Cluster | $24.63 $24.14 | ▼ −1.99% | ▼ −1.60% | $25.44 (+3.29%) |
Aug 12, 2026 7w ago | Insider Cluster | $24.34 $24.58 | ▲ +0.99% | ▲ +0.29% | $25.44 (+4.52%) |
Aug 12, 2026 7w ago | Insider Cluster | $24.34 $24.58 | ▼ −0.99% | ▼ −0.29% | $25.44 (−4.52%) |
Aug 12, 2026 7w ago | Insider Cluster | $24.34 $24.58 | ▼ −0.99% | ▼ −0.29% | $25.44 (−4.52%) |
Aug 10, 2026 7w ago | 144 | $24.30 $24.34 | ▲ +0.16% | ▼ −0.09% | $25.44 (+4.69%) |
Aug 7, 2026 8w ago | Insider Cluster | $24.21 $24.30 | ▼ −0.37% | ▼ −0.69% | $25.44 (−5.08%) |
Aug 7, 2026 8w ago | Insider Cluster | $24.21 $24.30 | ▲ +0.37% | ▲ +0.69% | $25.44 (+5.08%) |
US Market Status
Subscribe to SecBot
Get Real-Time SEC Filing Intelligence
Comprehensive SEC filing analysis delivered the moment filings hit EDGAR. Sentiment scoring, impact analysis, and actionable insights for every material event.
Try SecBot Free Coming soon: SecBot Pro with alerts, watchlists, and API access