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SEC EDGAROCT 61 min read$MIAX

Schafer Douglas M. JR sold $1.3M of MIAX

Schafer Douglas M. JR (EVP and CIO) sold 40,000 shares of MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) at $33.34 ($1.33M total) on 2026-10-02 under a Rule 10b5-1 trading plan.

Original reporting
SEC EDGAR · Schafer Douglas M. JR
Published Oct 6, 2026, 9:28 PM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Oct 6, 2026, 9:31 PM UTC. Informational, not investment advice.
How this was made
AlphAI summarizes source reporting and applies a structured AI analysis for relevance, timing, sentiment and ticker impact. Always verify material claims with the original publisher.
About AlphAI AI DeskScoring methodologyReport an issue
AlphAI market briefInsider activity
Primary signal
$MIAX
Bearish
medium confidence
Mentioned
$MIAX
Relevance
5/10
AlphAI data visualization · based on SEC EDGAR
Decision brief

The 30-second read

$MIAXBearishLow
01

Why it matters

The disclosed sale may prompt short‑term traders to watch MIAX for potential price weakness.

02

Market read

A C‑suite insider sold $1.33 M of MIAX stock, which could modestly pressure the share price.

03

What to watch

The 10b5‑1 plan indicates the sale was pre‑planned, reducing the informational value of the transaction.

Relevance 5/10Novelty 4/10Timing: post‑market filing

Background

SEC Form 4 filing discloses insider transactions; such filings are primary sources for insider activity.

Company-level read

Ticker impact

$MIAXBearishMedium confidence
Context

EVP and CIO Schafer sold 40,000 MIAX shares for $1.33M via a 10b5‑1 plan on Oct 2, reducing his holding to 387,414 shares.

Expected impact

likely slight downward pressure as the market prices in the insider sell

Evidence & confidence

C‑suite insider sold a sizable block ($1.3M) under a pre‑arranged plan, which traders often view as a bearish signal.

Market effects

Sector

Minimal impact on the broader exchange‑trading services sector.

Regional

Limited to U.S. markets where MIAX trades.

Global

Low; the filing does not affect global markets.

Counterpoint

What could challenge this read

The sale could be routine portfolio rebalancing, not a negative signal.

Key entities

  • person
    Schafer Douglas M. JR

    EVP and CIO of Miami International Holdings, Inc.

Read at source← All news

Full insider trading history

This story covers one filing. See everything behind it: every insider buy and sell on record, 10b5-1 plans, late filings, and which officers and directors are trading.

MIAX insider trading history →

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