$STX

MOSLEY WILLIAM D sold $10.4M of STX

MOSLEY WILLIAM D (CEO) sold 12,920 shares of Seagate Technology Holdings plc (STX) at an average of $803.47 ($783.84–$818.32, $10.38M total) across 29 trades on 2026-08-03 under a Rule 10b5-1 trading plan.

Original reporting
SEC EDGAR · MOSLEY WILLIAM D
Published Aug 4, 2026, 10:09 PM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Aug 4, 2026, 10:54 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.
AlphAI market briefInsider activity
Primary signal
$STX
Neutral
medium confidence
Mentioned
$STX
Relevance
6/10
AlphAI data visualization · based on SEC EDGAR
Decision brief

The 30-second read

$STXNeutralLow
01

Why it matters

The newest disclosed fact is the CEO’s $10.38M sale details (shares, price range, and post-transaction holdings). The filing itself does not provide new company fundamentals, so the main tradable angle is sentiment/supply optics rather than a fundamental repricing catalyst.

02

Market read

A planned CEO insider sale is disclosed with transaction size and execution details, which may slightly pressure sentiment but is unlikely to drive a major fundamental move alone.

03

What to watch

Traders should check whether there were concurrent insider buys/sales by other executives and whether the sale size is unusual relative to prior Form 4 patterns for STX.

Relevance 6/10Novelty 3/10Timing: filed 2026-08-04 after-hours; sale executed 2026-08-03

Background

The article is an SEC Form 4 insider transaction disclosure for Seagate Technology Holdings plc (STX), filed 2026-08-04, covering a CEO open-market sale executed 2026-08-03 under a 10b5-1 plan.

Company-level read

Ticker impact

$STXNeutralMedium confidence
Context

Seagate CEO William D. Mosley sold about $10.38M of STX shares in an open-market transaction under a pre-arranged 10b5-1 plan on 2026-08-03.

Expected impact

Likely limited, short-lived impact unless accompanied by other company-specific catalysts.

Evidence & confidence

Form 4 details a planned open-market sale by the CEO; the filing does not include new guidance, deals, or regulatory actions, so fundamental read-through is typically modest.

Market effects

Insider-sale optics can marginally affect sentiment for storage/enterprise hardware names, but this filing is company-specific and not sector-wide.

No clear regional spillover; US-listed filing with no macro/regulatory trigger.

Limited global relevance because it is a planned insider transaction without new business developments.

Counterpoint

Because the sale is explicitly under a pre-arranged 10b5-1 plan, it may reflect diversification or liquidity needs rather than bearish expectations.

Key entities

  • Seagate Technology Holdings plc

    Subject of the Form 4 insider transaction disclosure (STX).

  • MOSLEY WILLIAM D

    CEO and reporting person who sold 12,920 shares under a pre-arranged 10b5-1 plan.

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.

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