The cluster is small relative to market cap and entirely sells, which historically carry weak predictive power. No material bearish signal here. Monitor next quarterly earnings for any fundamental deterioration that might explain the selling, but the pattern appears liquidity-driven.
Price Chart
Executive Summary
Two ATNI insiders — SVP & General Counsel Mary Mabey and 10% owner Cornelius B. Prior Jr. — sold a combined $343K in open-market sales over a one-week window. The sales are modest relative to ATNI's $484M market cap (~0.07%), and the cluster is entirely sells, which per academic literature are weak predictors of future returns. The prior 30-day insider activity also shows a net selling bias ($714K in 9 sells), reinforcing a routine liquidity-driven pattern rather than a material bearish signal.
Key Financial Metrics
Key Facts
- Two insiders sold a total of $343K in open-market transactions over 7 days
- Mary Mabey (SVP & General Counsel) sold 5,000 shares at $32.13 for $161K on 2026-08-10
- Cornelius B. Prior Jr. (10% Owner) sold 5,745 shares at $31.79 for $183K on 2026-08-17
- Total cluster value of $343K represents ~0.07% of ATNI's $484M market cap
- Prior 30-day insider activity shows 9 sells totaling $714K, consistent with routine selling pattern
Financial Impact
Total insider sales of $343K, or ~0.07% of market cap — immaterial
Risk Factors
- Insider selling could accelerate if fundamentals deteriorate
- The 10% owner's continued selling may signal reduced conviction
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-1787199595656 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 22, 2026 4d ago | Press Release | $25.91 | awaiting T+20 | — | $26.30 (+1.51%) |
Sep 23, 2026 4w ago | Press Release | $29.14 $26.23 | ▼ −9.99% | ▼ −9.57% | $26.30 (−9.75%) |
Sep 18, 2026 5w ago | Insider Cluster | $29.36 $25.25 | ▼ −14.01% | ▼ −13.10% | $26.30 (−10.43%) |
Sep 18, 2026 5w ago | SC 13D/A | $28.43 $25.75 | ▼ −9.44% | ▼ −9.64% | $26.30 (−7.50%) |
Sep 4, 2026 7w ago | Insider Cluster | $30.93 $28.10 | ▼ −9.15% | ▼ −9.75% | $26.30 (−14.97%) |
Sep 2, 2026 7w ago | Insider Cluster | $30.91 $28.04 | ▼ −9.29% | ▼ −9.13% | $26.30 (−14.91%) |
Aug 26, 2026 8w ago | Insider Cluster | $29.69 $29.14 | ▼ −1.85% | ▼ −1.34% | $26.30 (−11.42%) |
Aug 19, 2026 9w ago | Insider Cluster | $31.14 $28.73 | ▼ −7.74% | ▼ −7.62% | $26.30 (−15.54%) |
Aug 17, 2026 10w ago | Insider Cluster | $31.10 $29.45 | ▼ −5.28% | ▼ −3.54% | $26.30 (−15.42%) |
Aug 12, 2026 10w ago | Insider Cluster | $31.87 $30.32 | ▼ −4.86% | ▼ −3.12% | $26.30 (−17.48%) |
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