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Insider Cluster (2 insiders) ·Filed Aug 27, 2026

ATEX

Anterix Inc.
NEUTRAL
Impact 2/10
Horizondays Processed2mo ago
Insider cluster: 2 insiders, $890K total
Actionable Insight • Neutral

This insider cluster is routine and non-informative — the sales follow option exercises and are small relative to market cap. No trading signal. Monitor for any material corporate development (spectrum license catalyst, earnings, or partnership) that would drive the stock independently of this insider activity.

DirectionNeutral
Confidencehigh
Horizondays
Latest settled — T+20d ⚠ clustered
ATEX ▼ -11.46% at T+20d
NEUTRAL call -11.46% · α vs SPY -11.22% · entry $92.33 → $81.75
Next anchor: T+60d in 24d
Latest observation: T+40 -21.41% FF3 residual α
Entry = T+0 close
Aug 27, 2026
via day close
T+1d
-1.56%
call -1.56% · α -1.26%
$90.89
settled 2mo ago
T+5d
-6.56%
call -6.56% · α -6.67%
$86.27
settled 8w ago
T+20d
-11.46%
call -11.46% · α -11.22%
$81.75
settled 5w ago
T+60d
Pending
in 24d

Price Chart

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Executive Summary

Two Anterix insiders — the Chief Regulatory & Communications Officer and a Director — sold a combined $890K in open-market shares over a 2-day window. The C-suite officer's sales follow a derivative exercise pattern (cashless exercise-and-sell), which is a routine liquidity event, not a bearish signal. The Director's sales are smaller and also follow option exercises. At $1.9B market cap, the total open-market sales represent ~0.05% of market cap, well below the 0.1% materiality threshold, making this cluster trivial in economic terms.

Key Financial Metrics

Direction
selling
Total Value
$890.0K
Insiders
2

Key Facts

  • Two insiders sold a combined $890K in open-market shares over 2 days
  • Chief Regulatory & Communications Officer sold $503K after exercising 40,000 options at $34.72
  • Director sold $387K after exercising 10,000 options at $33.62
  • Total open-market sales represent ~0.05% of $1.9B market cap — below materiality threshold
  • Tax withholding of 16,561 shares ($1.5M) is a non-cash event, not a directional sale
  • No C-suite cluster buy signal — the officer's sales are liquidity-driven from option exercises

Financial Impact

Total open-market sales of $890K represent ~0.05% of $1.9B market cap — economically trivial

dilution

Risk Factors

  • Insider sales could accelerate if the stock continues to rise near $90-$94 range
  • No C-suite open-market buying to offset the selling pattern

Market Snapshot

Exchange
Nasdaq
Sector
Telephone Communications (No Radiotelephone)
Analyst Consensus
80% bullish (10 analysts)

Investment Themes

Media & Telecom

Documents Analyzed

This report is based on 1 SEC document filed with EDGAR.

DocumentAccession Number
CLUSTER Data (Synthetic)cluster-ATEX-1787900730145
19 reports for ATEX
Performance horizon
100% Hit rate @ T+20 8 of 8 directional calls Went positive at some point 8 of 8 best @ T+60▲ +168.03%Apr 6, 2026
Filters
Rows
Reports for ATEX — sortable, filterable
TypeNow
Oct 9, 2026
17d ago
144
NEUTRAL ★ 3/10
$84.96awaiting T+20—$79.64 (−6.26%)
Sep 18, 2026
5w ago
8-K
NEUTRAL ★ 3/10
$83.62 $77.87▼ −6.88%▼ −5.97%$79.64 (−4.76%)
Sep 11, 2026
6w ago
Insider Cluster
NEUTRAL ★ 2/10
$77.59 $84.96▲ +9.50%▲ +6.98%$79.64 (+2.64%)
Aug 27, 2026
8w ago
Insider Cluster
NEUTRAL ★ 2/10
$92.33 $81.75▼ −11.46%▼ −11.22%$79.64 (−13.74%)
Aug 26, 2026
8w ago
Insider Cluster
BEARISH ★ 5/10
$94.67 $81.42▲ +14.00%▲ +14.28%$79.64 (+15.88%)
Aug 18, 2026
9w ago
Insider Cluster
BEARISH ★ 5/10
$88.68 $77.42▲ +12.70%▲ +11.86%$79.64 (+10.19%)
Aug 18, 2026
9w ago
Insider Cluster
BEARISH ★ 5/10
$88.68 $77.42▲ +12.70%▲ +11.86%$79.64 (+10.19%)
Aug 14, 2026
10w ago
Insider Cluster
NEUTRAL ★ 3/10
$91.53 $77.59▼ −15.23%▼ −13.24%$79.64 (−12.99%)
Jul 29, 2026
12w ago
Press Release
NEUTRAL ★ 1/10
$93.58awaiting T+20—$79.64 (−14.90%)
Jul 17, 2026
14w ago
DEFA14A
NEUTRAL ★ 3/10
$100.35 $91.53▼ −8.79%▼ −13.24%$79.64 (−20.64%)
Showing 10 of 19

US Market Status

Market Closed — Opens in 3h 23m

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Report published Aug 28, 2026