AlphAIAlphAI — Financial news for AI agents
SEC EDGARJUL 221 min read$WDC

Tregillis Cynthia L sold $428K of WDC

Tregillis Cynthia L (Chief Legal Officer & Corp Sec) sold 808 shares of WESTERN DIGITAL CORP (WDC) at $529.63 ($0.43M total) on 2026-07-21 under a Rule 10b5-1 trading plan.

Original reporting
SEC EDGAR · Tregillis Cynthia L
Published Jul 22, 2026, 12:56 AM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Jul 22, 2026, 1:03 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 DeskScoring methodologyReport 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
01

Why it matters

The disclosure updates the record of insider activity but does not introduce new company fundamentals, legal outcomes, or guidance.

02

Market read

Traders may note insider selling activity, but the 10b5-1 framing and lack of new fundamentals suggest low immediate trading value.

03

What to watch

The article does not state motivations, tax considerations, or whether other insiders sold/bought around the same window.

Relevance 3/10Novelty 3/10Timing: Filed 2026-07-21 after-hours, reflecting the 2026-07-21 sale execution.

Background

This is an SEC Form 4 insider transaction by Cynthia L Tregillis, Chief Legal Officer and corporate secretary at Western Digital.

Company-level read

Ticker impact

$WDCNeutralHigh confidence
Context

Western Digital COO and corporate secretary Cynthia L Tregillis sold 808 shares on 2026-07-21 under a pre-arranged 10b5-1 plan.

Expected impact

Likely limited near-term impact; treat as compliance-driven rather than a fundamental signal.

Evidence & confidence

The filing is a Form 4 insider transaction, explicitly tied to a pre-arranged 10b5-1 plan, and provides no accompanying company news or guidance changes.

Market effects

Sector

No direct read-across to the storage/semis sector from a single routine insider sale.

Regional

None indicated.

Global

None indicated.

Counterpoint

What could challenge this read

Even with 10b5-1, repeated insider selling can coincide with internal caution; monitor for clustering of sales or changes in plan behavior.

Key entities

  • issuer
    Western Digital Corp

    Subject of the Form 4 insider sale disclosure.

  • insider
    Cynthia L Tregillis

    Chief Legal Officer and corporate secretary who sold shares under a 10b5-1 plan.

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.

WDC insider trading history →

Related articles

SEP 19
$SWKSMed

Skyworks Jumped, Coinbase and Bitcoin Dropped

Bitcoin (BTC) fell 3% to $75,600 after the Senate failed to pass the CLARITY bill, leading to a sell-off in crypto-related stocks including Coinbase (COIN) and Robinhood (HOOD). Skyworks Solutions (SWKS) rose 13.55% as it and Qorvo (QRVO) await final merger approval from China.

baystreet.ca2 min
SEP 18
$WDCMedAI 8/10

Western Digital vs. Sandisk: Which Storage Stock is the Better Bet?

Western Digital (WDC) and Sandisk (SNDK) are now separate entities post-spinoff, focusing on HDDs and flash storage, respectively. Both benefit from AI-driven data growth, with WDC reporting $12.92B revenue (up 36% YoY) and SNDK $20.25B (up 175% YoY). WDC trades at a forward P/S of 7.11, SNDK at 4.61. Analysts revised earnings estimates upward for both.

tradingview.com3 min
SEP 14
$WDCMed

Why Western Digital (WDC) Stock Is Trading Lower Today

Western Digital (WDC) shares fell 4.8% after announcing the redemption of $109.5M in convertible notes, amid broader sector weakness. The stock later recovered slightly to $427.89, down 4.2%. The company's shares have seen high volatility, with a 128% gain YTD but still 42.7% below its 52-week high.

financialcontent.com2 min
SEP 14
$STXMedAI 8/10

Seagate Vs. Western Digital: One Moved First on AI Storage Demand. The Other Is Playing It Safe.

Seagate (STX) and Western Digital (WDC) both reported strong fiscal 2026 earnings, with Seagate's Q4 revenue at $3.63B (up 48.5% YoY) and WDC's at $3.75B (up 43.8% YoY). Seagate's 44TB HAMR drives are already shipping to 75% of top cloud customers, while WDC's competing drive is expected in 2027. Seagate's gross margin expanded to 52% from 37% YoY, and WDC's P/E is 17, attracting value-focused investors.

yahoo.com3 min
SEP 14
$WDCLow

WESTERN DIGITAL CORP (WDC): Regulation FD Disclosure

WESTERN DIGITAL CORP (WDC) filed an SEC Form 8-K — Regulation FD Disclosure. Exhibit 99.1 WESTERN DIGITAL ANNOUNCES REDEMPTION OF 3.00% CONVERTIBLE SENIOR NOTES DUE 2028 SAN JOSE, Calif. — Sept. 14, 2026 — Western Digital Corporation (Nasdaq: WDC) (“Western Digital”) announced today that it will redeem all of the $109,505,000 aggregate principal amount ou

SEC EDGAR 8-K1 min
SEP 8
$WDCMedAI 8/10

Here's the One Storage Stock I'd Buy With $2,000

Western Digital (WDC) and Seagate (STX) report strong demand and long-term contracts for storage products due to AI data center growth. WDC's Q4 revenue rose 44% YoY to $3.75B, with guidance for 42-49% growth. STX's Q4 revenue jumped 48% YoY to $3.63B, with contracts securing pricing through 2027. Sandisk (SNDK) has price floors for over half of fiscal 2027 shipments.

yahoo.com3 min