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SEC EDGARAUG 241 min read$STX

MOSLEY WILLIAM D sold $15.4M of STX

MOSLEY WILLIAM D (CEO) sold 18,138 shares of Seagate Technology Holdings plc (STX) at $849.35 ($15.41M total) across 3 trades on 2026-08-21.

Original reporting
SEC EDGAR · MOSLEY WILLIAM D
Published Aug 24, 2026, 9:10 PM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Aug 24, 2026, 9:15 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
$STX
Bearish
medium confidence
Mentioned
$STX
Relevance
7/10
AlphAI data visualization · based on SEC EDGAR
Decision brief

The 30-second read

$STXBearishLow
01

Why it matters

The transaction introduces new information about insider sentiment, which may affect short‑term trading decisions.

02

Market read

Insider sell by a top executive is a material event for investors monitoring corporate governance and stock valuation.

03

What to watch

No disclosed reason for the sale; could be tax planning or personal liquidity needs.

Relevance 7/10Novelty 7/10Timing: post‑market 2026-08-21

Background

Form 4 filing provides the first public disclosure of the insider transaction.

Company-level read

Ticker impact

$STXBearishMedium confidence
Context

CEO William D. Mosley sold 18,138 shares for $15.4M via open-market transactions on 2026-08-21.

Expected impact

Potential short-term dip of 1‑2% as market digests the sale.

Evidence & confidence

The sale size is material for a mid‑cap and the insider is the CEO; however, no accompanying corporate news suggests a limited immediate impact.

Market effects

Sector

May raise concerns for the data storage sector if other executives follow suit.

Regional

Limited to U.S. investors; no broader regional effect.

Global

Minimal global impact beyond Seagate shareholders.

Counterpoint

What could challenge this read

The sale could be a routine diversification rather than a negative signal.

Key entities

  • person
    William D. Mosley

    CEO of Seagate Technology Holdings plc

  • company
    Seagate Technology Holdings plc

    Data storage solutions provider listed as STX

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.

STX insider trading history →

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