SEC EDGARAUG 281 min read$WDC

Tregillis Cynthia L sold $696K of WDC

Tregillis Cynthia L (Chief Legal Officer & Corp Sec) sold 1,483 shares of WESTERN DIGITAL CORP (WDC) at an average of $469.51 ($450.78–$478.36, $0.70M total) across 2 trades over 2026-08-26 to 2026-08-27 under a Rule 10b5-1 trading plan.

Original reporting

SEC EDGAR · Tregillis Cynthia L

Published Aug 28, 2026, 12:05 AM UTC

Analysis

alphai AI DeskAI-generated

Added to alphai Aug 28, 2026, 12:33 AM 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 Desk Scoring methodology Report an issue

alphai market briefInsider activity

Primary signal

$WDC

Bearish

medium confidence

Mentioned

$WDC

Relevance

4/10

alphai data visualization · based on SEC EDGAR

Decision brief

The 30-second read

$WDCBearishLow

Why it matters

The disclosed sale is modest relative to Western Digital's market cap, likely causing limited price movement.

Market read

Routine insider sale with low trading relevance; may be noted by short‑term traders but unlikely to drive significant moves.

What to watch

Potential tax‑loss harvesting or pre‑planned 10b5‑1 execution; not indicative of operational issues.

Relevance 4/10Novelty 4/10Timing: filed today (Aug 27)

Background

Form 4 filings disclose insider trades; a 10b5‑1 plan indicates pre‑arranged execution.

Company-level read

Ticker impact

AI estimates · verify against primary disclosures

$WDCBearishMedium confidence

Context

Chief Legal Officer Cynthia Tregillis sold 1,483 shares for $696K via a 10b5‑1 plan, reducing her stake to 112,155 shares.

Expected impact

Potential short‑term dip of 0.5‑1% if market interprets as lack of confidence.

Evidence & confidence

Sale size is modest relative to market cap; insider is a legal officer, not a founder, so impact is limited.

Market effects

Sector

No broader sector impact; data‑storage sector unchanged.

Regional

U.S. market only; no regional ripple.

Global

Minimal global relevance.

Counterpoint

What could challenge this read

Sale could be routine portfolio rebalancing, not a signal of weakness.

Key entities

Company
Western Digital Corp.
Global data‑storage solutions provider.
Insider
Cynthia L. Tregillis
Chief Legal Officer & Corporate Secretary.

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