$STX

MOSLEY WILLIAM D sold $14.1M of STX

MOSLEY WILLIAM D (CEO) sold 17,080 shares of Seagate Technology Holdings plc (STX) at an average of $827.30 ($819.41–$837.98, $14.13M total) across 19 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 open-market sale details (shares, price range, total value) and post-transaction holdings, executed under a 10b5-1 plan.

02

Market read

Traders may monitor insider activity for sentiment, but this filing alone does not provide new operational or financial information.

03

What to watch

The sale is explicitly under a pre-arranged 10b5-1 plan, and the filing does not state the CEO’s rationale or whether other insiders are buying/selling concurrently.

Relevance 6/10Novelty 4/10Timing: filed 2026-08-04 after trades on 2026-08-03

Background

The article is an SEC Form 4 insider transaction disclosure for Seagate Technology Holdings plc (STX).

Company-level read

Ticker impact

$STXNeutralMedium confidence
Context

Seagate CEO William D. Mosley sold about 17,080 shares in an open-market transaction worth $14.13M, under a pre-arranged 10b5-1 plan.

Expected impact

Limited near-term impact; any reaction is likely sentiment-driven and short-lived.

Evidence & confidence

The filing discloses transaction size and timing, but it does not include new company fundamentals, guidance, or regulatory/legal developments. 10b5-1 pre-arrangement typically reduces interpretive weight.

Market effects

No clear sector read-through; insider sales are generally idiosyncratic unless tied to broader corporate events.

None indicated.

None indicated.

Counterpoint

Large insider sales can still coincide with private information, even when executed under a 10b5-1 plan, so some traders may treat it as a mild caution signal.

Key entities

  • Seagate Technology Holdings plc

    Subject of the Form 4 insider transaction disclosure.

  • MOSLEY WILLIAM D

    CEO and reporting person who sold shares.

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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