SEC EDGARSEP 91 min read$WDC

Tregillis Cynthia L sold $195K of WDC

Tregillis Cynthia L (Chief Legal Officer & Corp Sec) sold 432 shares of WESTERN DIGITAL CORP (WDC) at $451.20 ($0.19M total) on 2026-09-04 under a Rule 10b5-1 trading plan.

Original reporting

SEC EDGAR · Tregillis Cynthia L

Published Sep 9, 2026, 12:13 AM UTC

Analysis

AlphAI AI DeskAI-generated

Added to AlphAI Sep 9, 2026, 12:34 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

Neutral

high confidence

Mentioned

$WDC

Relevance

3/10

AlphAI data visualization · based on SEC EDGAR

Decision brief

The 30-second read

$WDCNeutralLow

Why it matters

The disclosed sale is small relative to total holdings and unlikely to affect stock price.

Market read

Routine insider sale with minimal market relevance.

What to watch

Potential tax planning or diversification motives.

Relevance 3/10Novelty 3/10Timing: sale dated 2026-09-04

Background

SEC Form 4 filing discloses insider transactions for public companies.

Company-level read

Ticker impact

AI estimates · verify against primary disclosures

$WDCNeutralHigh confidence

Context

Chief Legal Officer sold 432 shares for $194,918 via a 10b5-1 plan.

Expected impact

No material price movement expected.

Evidence & confidence

The sale represents less than 0.2% of holdings and is a routine pre‑arranged transaction.

Market effects

Sector

No broader sector impact; insider sale is company‑specific.

Regional

None.

Global

None.

Counterpoint

What could challenge this read

The sale could be a routine liquidity move, not a bearish signal.

Key entities

Insider
Cynthia L. Tregillis
Chief Legal Officer & Corporate Secretary of Western Digital.
Company
Western Digital Corp
Manufacturer of data storage solutions.

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