The CEO's $12.55M open-market purchase is a strong conviction signal at a stock price well below his entry. Monitor for any upcoming earnings or strategic announcements that could validate the insider buying.
How the stock moved after the report
BULLISH VIEWSTOCK ABOVE ENTRY AT T+5- T+0 · Sep 14 $2.68entry
- T+1 · 7w ago +3.73%α +4.17% · $2.78
- T+5 · 7w ago +2.61%α +0.48% · $2.75
- T+20 · due 25d ago Pending
- T+38 · todayOpen
- T+60 · in 5w Pending
Price Chart
REPLAYWatch the reaction play outHow similar events traded
Executive Summary
Cosan S.A. (CSAN) insider cluster shows a mixed pattern: CEO Marcelo Martins made a large $12.55M open-market purchase at $5.14/share, while Director Rubens Ometto sold $267K worth. The net direction is mixed, but the CEO's conviction buy dominates in dollar terms and seniority, suggesting insider confidence in the company's value at current depressed levels.
Key Financial Metrics
Key Facts
- CEO Marcelo Martins bought 2.44M shares for $12.55M at $5.14/share on 2026-05-19
- Director Rubens Ometto sold 77.6K shares for $267K at $3.44/share on 2026-05-22
- Director Cordes Burkhard Otto bought 10K shares for $43K at $4.27/share on 2026-05-26
- Total cluster value: $12.86M, representing ~0.48% of $2.7B market cap
- CEO's buy alone is ~0.46% of market cap, a significant insider purchase
Financial Impact
CEO purchase of $12.55M represents ~0.46% of market cap, a material insider buy signal
Risk Factors
- Director Ometto's sale at $3.44, below CEO's buy price, creates conflicting signals
- Stock has declined ~24% since CEO's May 19 purchase, suggesting market disagrees with his valuation
- Brazilian macro and sector headwinds could further pressure the stock
Market Snapshot
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-CSAN-1789539428707 |
Track record builds as more directional reports settle.
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 28, 2026 8d ago | 6-K | $1.77 $1.84 | ▲ +3.95% | ▲ +8.68% | $1.94 (+9.60%) |
Oct 20, 2026 16d ago | 6-K | $3.95 $2.00 | ▼ −49.37% | ▼ −49.27% | $1.94 (−50.89%) |
Sep 15, 2026 7w ago | Insider Cluster | $2.68 $2.75 | ▲ +2.61% | ▲ +0.48% | $1.94 (−27.61%) |
May 26, 2026 23w ago | Insider Cluster | $3.18 $2.85 | ▼ −10.38% | ▼ −10.85% | $1.94 (−38.99%) |
US Market Status
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