The cluster is routine and non-informative — selling is small relative to market cap and tied to option exercises. No bearish read-through. Monitor next earnings for any guidance changes, but this filing alone does not warrant action.
Price Chart
Executive Summary
Magnite insider cluster shows net selling of $789K over a 7-day window, driven primarily by a director (Evans Katie Seitz) selling $763K in open-market sales alongside derivative exercises. CTO David Buonasera sold a small $26K position. The total value is ~0.02% of Magnite's $3.4B market cap, making this a trivial cluster in absolute terms. The selling is likely liquidity-driven from option exercises rather than a bearish signal, especially given the company's strong analyst consensus (86% bullish) and positive institutional accumulation.
Key Financial Metrics
Key Facts
- Insider cluster over 7 days: 2 insiders, net selling $789K
- Evans Katie Seitz sold $763K in open-market sales alongside derivative exercises (non-cash)
- CTO David Buonasera sold $26K in a single transaction
- Total cluster value is ~0.02% of Magnite's $3.4B market cap — trivial
- Recent 30-day insider activity: 8 sells totaling $2.6M, consistent with routine pattern
- Analyst consensus: 86% bullish (5 Strong Buy, 14 Buy, 3 Hold)
- Institutional 13F: top holders BlackRock, Vanguard, Fidelity; recent moves show accumulation (8 add, 2 new, 6 doubled)
Financial Impact
Total insider selling of $789K represents ~0.02% of market cap — immaterial
Risk Factors
- Insider selling could accelerate if the stock continues to rise, but current levels are trivial
- No material risk from this filing
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-1789107050651 |
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
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