The $372K insider sell cluster is too small relative to ATNI's $481M market cap to warrant a bearish read-through. Monitor the next 10-Q for any fundamental deterioration, but this cluster alone does not signal material negative information. The 10% owner's gift of 12,000 shares on the same day suggests estate planning rather than a coordinated bearish view.
Price Chart
Executive Summary
Two ATNI insiders — a 10% owner and the SVP/General Counsel — sold a combined $372K in open-market sales over a 7-day window, with the bulk ($211K) executed by the 10% owner at $32.49 on August 10. The cluster is entirely sells, no buys, and the $372K total represents ~0.08% of ATNI's $481M market cap, falling below the 0.1% materiality threshold. Per the asymmetric buy/sell calibration, insider sells are weak predictors on average, and this cluster lacks the dollar magnitude to signal material negative information — treat as routine portfolio diversification and tax planning, not a bearish read-through on fundamentals.
Key Financial Metrics
Key Facts
- Two ATNI insiders sold a combined $372K in open-market transactions over a 7-day window (Aug 3–10, 2026).
- 10% owner Cornelius B. Prior Jr. sold 6,500 shares at $32.49 for $211K on Aug 10, plus 500 shares at $33.25 for $16.6K on the same day.
- SVP and General Counsel Mary Mabey sold 5,000 shares at $32.13 for $161K on Aug 10.
- Total cluster value of $372K represents ~0.08% of ATNI's $481M market cap — below the 0.1% materiality threshold.
- No insider purchases were made during the cluster window; the net direction is entirely selling.
- Prior also gifted 12,000 shares on Aug 10 (non-cash, $0 value), which does not affect the economic signal.
Financial Impact
Total insider sales of $372K represent ~0.08% of ATNI's $481M market cap — immaterial relative to company size.
Risk Factors
- Insider selling could accelerate if the stock appreciates further, but the current cluster is too small to indicate informed selling.
- No insider buying to offset the selling pattern — lack of bullish conviction from management.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-ATNI-1786576914287 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 22, 2026 3d ago | Press Release | $26.23 | awaiting T+20 | — | $26.06 (−0.67%) |
Sep 23, 2026 4w ago | Press Release | $29.14 $26.23 | ▼ −9.99% | ▼ −9.57% | $26.06 (−10.59%) |
Sep 18, 2026 5w ago | Insider Cluster | $29.36 $25.25 | ▼ −14.01% | ▼ −13.10% | $26.06 (−11.27%) |
Sep 18, 2026 5w ago | SC 13D/A | $28.43 $25.75 | ▼ −9.44% | ▼ −9.64% | $26.06 (−8.36%) |
Sep 4, 2026 7w ago | Insider Cluster | $30.93 $28.10 | ▼ −9.15% | ▼ −9.75% | $26.06 (−15.76%) |
Sep 2, 2026 7w ago | Insider Cluster | $30.91 $28.04 | ▼ −9.29% | ▼ −9.13% | $26.06 (−15.71%) |
Aug 26, 2026 8w ago | Insider Cluster | $29.69 $29.14 | ▼ −1.85% | ▼ −1.34% | $26.06 (−12.24%) |
Aug 19, 2026 9w ago | Insider Cluster | $31.14 $28.73 | ▼ −7.74% | ▼ −7.62% | $26.06 (−16.33%) |
Aug 17, 2026 9w ago | Insider Cluster | $31.10 $29.45 | ▼ −5.28% | ▼ −3.54% | $26.06 (−16.21%) |
Aug 12, 2026 10w ago | Insider Cluster | $31.87 $30.32 | ▼ −4.86% | ▼ −3.12% | $26.06 (−18.25%) |
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.
Create a free account Live analysis, Telegram alerts, watchlists and the MCP server for subscribers