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Insider Cluster (2 insiders) ·Filed Aug 18, 2026

ATEX

Anterix Inc.
BEARISH
Impact 5/10
Horizondays Processed2mo ago
Insider cluster: 2 insiders, $4.3M total
Actionable Insight ▼ Bearish

Monitor for any forthcoming 8-K or press release that may explain the timing of these sales. If the CEO continues selling in the coming weeks without a 10b5-1 plan, it would amplify the bearish signal. Conversely, if the company announces a major contract or partnership, the sales may be opportunistic profit-taking rather than a negative signal.

DirectionBearish
Confidencemedium
Horizondays
Latest settled — T+20d ⚠ clustered
ATEX ▼ -12.70% at T+20d
SHORT call ✓ call won +12.70% · α vs SPY +11.86% · entry $88.68 → $77.42
Next anchor: T+60d in 15d
Latest observation: T+46 +21.77% FF3 residual α
Entry = T+0 close
Aug 18, 2026
via day close
T+1d
-3.80%
call +3.80% · α +2.96%
$85.31
settled 2mo ago
T+5d
+6.18%
call -6.18% · α -6.57%
$94.16
settled 2mo ago
T+20d
-12.70%
call +12.70% · α +11.86%
$77.42
settled 6w ago
T+60d
Pending
in 15d

Price Chart

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Executive Summary

CEO Scott Lang and Director William Heard sold a combined $4.25M in open-market transactions on August 14, 2026. The CEO's sales ($3.16M) represent a significant cluster, while the Director's $4.18M sale is the largest single trade. This insider selling cluster is notable given the stock's recent strong performance, but the dollar amount is modest relative to the $1.8B market cap (~0.24%). The cluster is amplified by the presence of a press release context (cross-filing amplifier), suggesting the sales may be timed around a corporate announcement, but the lack of a 10b5-1 plan disclosure in the data reduces the likelihood of routine liquidity sales.

Key Financial Metrics

Direction
selling
Total Value
$4.3M
Insiders
2

Key Facts

  • CEO Scott Lang sold $3.16M in open-market sales on August 14, 2026 across four trades at prices between $88.96 and $91.69.
  • Director William Heard sold $4.18M in a single open-market transaction at $90.11 on the same day.
  • Total insider selling of $4.25M represents approximately 0.24% of ATEX's $1.8B market cap.
  • The cluster includes only open-market sales (code S) with no buys, no 10b5-1 plan disclosure, and no non-cash transactions.

Financial Impact

Total insider sales of $4.25M, or 0.24% of market cap, concentrated in a single day by the CEO and a Director.

insider ownershipmarket sentiment

Risk Factors

  • CEO and Director selling simultaneously may indicate private information about upcoming negative news or a peak in valuation.
  • The absence of any insider buying in the cluster suggests a lack of confidence at the top.

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-1787120223940
19 reports for ATEX
Performance horizon
100% Hit rate @ T+20 7 of 7 directional calls Went positive at some point 7 of 7 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 1h 12m

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Report published Aug 19, 2026