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Insider Cluster (5 insiders) ·Filed Apr 8, 2026

MIAX

MIAMI INTERNATIONAL HOLDINGS, INC.
BEARISH
Impact 7/10
Horizondays Processed6mo ago
Insider cluster: 3 insiders, $2.3M total
Actionable Insight ▼ Bearish

Coordinated selling by C-suite executives, especially the CEO, following option exercises suggests profit-taking at elevated levels. Traders should watch for downward pressure on the stock and any upcoming earnings or guidance changes that may have prompted the timing.

DirectionBearish
Confidencehigh
Horizondays
Final — all horizons settled through T+60d
MIAX ▼ -3.27% at T+60d
SHORT call ✓ call won +3.27% · α vs SPY +13.73% · entry $42.22 → $40.84
Entry = T+0 close
Apr 7, 2026
via day close
T+1d
-2.06%
call +2.06% · α +2.63%
$41.35
settled 7mo ago
T+5d
+4.74%
call -4.74% · α -1.22%
$44.22
settled 7mo ago
T+20d
+13.00%
call -13.00% · α -4.46%
$47.71
settled 6mo ago
T+60d
-3.27%
call +3.27% · α +13.73%
$40.84
settled 4mo ago

Price Chart

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Executive Summary

Three executives at MIAX sold a combined $2.3 million in shares over a 7-day period, including CEO Thomas Gallagher selling $3.04 million on April 15. The cluster reflects coordinated open-market selling by top leadership, with total insider sales reaching $4.3 million in 30 days, signaling potential lack of confidence despite recent option exercises.

Key Financial Metrics

Direction
selling
Total Value
$4.3M
Insiders
5

Key Facts

  • CEO Thomas P. Gallagher sold 70,001 shares for $3.04 million on April 15, following option exercise.
  • EVP Barbara Comly sold 29,667 shares for $1.29 million on April 15, also after exercising options.
  • Two additional EVPs sold $1.01 million combined on April 8.
  • Total open-market sales in the past 7 days: $4.3 million across 3 executives.
  • Total insider sales represent ~0.1% of MIAX's $4.1B market cap — significant for insider activity level.

Financial Impact

$4.3 million in insider selling over 30 days, with $2.3 million in one week

insider sentimentshareholder confidencepotential dilution from option exercises

Risk Factors

  • Perception of insider pessimism could erode investor confidence.
  • Further selling from insiders or institutions if business momentum slows.

Market Snapshot

Exchange
NYSE
Sector
Security Brokers, Dealers & Flotation Companies

Investment Themes

Traditional Finance

Documents Analyzed

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

DocumentAccession Number
CLUSTER Data (Synthetic)cluster-MIAX-1776456999255
42 reports for MIAX
Performance horizon
63% Hit rate @ T+1 5 of 8 directional calls Went positive at some point 8 of 8 best @ T+5▲ +10.93%May 6, 2026
Filters
Rows
Reports for MIAX — sortable, filterable
TypeNow
Oct 26, 2026
today
Insider Cluster
NEUTRAL ★ 2/10
—awaiting T+1——
Oct 1, 2026
25d ago
Press Release
NEUTRAL ★ 1/10
$33.75 $33.01▼ −2.19%▼ −2.93%$33.98 (+0.68%)
Sep 4, 2026
7w ago
Insider Cluster
NEUTRAL ★ 3/10
$43.46 $42.89▼ −1.31%▼ −0.85%$33.98 (−21.81%)
Sep 4, 2026
7w ago
Insider Cluster
NEUTRAL ★ 2/10
$43.46 $42.89▼ −1.31%▼ −0.85%$33.98 (−21.81%)
Aug 19, 2026
9w ago
Insider Cluster
MIXED ★ 5/10
$41.32 $42.59▲ +3.07%▲ +2.66%$33.98 (−17.76%)
Aug 19, 2026
9w ago
Insider Cluster
BEARISH ★ 5/10
$41.32 $42.59▼ −3.07%▼ −2.66%$33.98 (+17.76%)
Aug 6, 2026
11w ago
Insider Cluster
BEARISH ★ 6/10
$44.23 $43.59▲ +1.45%▲ +1.42%$33.98 (+23.17%)
Jul 16, 2026
14w ago
Insider Cluster
NEUTRAL ★ 5/10
$42.33 $42.04▼ −0.69%▼ −0.52%$33.98 (−19.73%)
Jul 14, 2026
14w ago
Insider Cluster
NEUTRAL ★ 3/10
$42.43 $42.89▲ +1.08%▲ +1.63%$33.98 (−19.92%)
Jul 7, 2026
15w ago
Insider Cluster
MIXED ★ 5/10
$41.86 $42.99▲ +2.70%▲ +1.85%$33.98 (−18.82%)
Showing 10 of 42

US Market Status

Market Closed — Opens Wed (12h 36m)

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Report published Apr 17, 2026