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sellWeak cluster of 310b5-1 plan

Cynthia L Tregillis sold $696k of WDC

Chief Legal Officer & Corp Sec at WESTERN DIGITAL CORP. 1,483 shares at an average of $469.51, traded Aug 26, 2026, filed Aug 27, 2026.

Warning score
16
Value
$696k
1,483 shares
Holdings after
112,155
-1% from before
From 52-week low
+490%
low $79.47, close $468.73
From 52-week high
-37%
high $745.99, as of Aug 26, 2026

Score components

  • Role
    Officer
    +15
  • Trade size
    $696k at market
    +21
  • Share of holdings sold
    Sold 1.3% of holdings
    0
  • Cluster
    3 insiders selling within 14 days
    +15
  • Exercise and sell
    Shares came from an option exercise in the same filing
    -15
  • 10b5-1 plan
    Pre-scheduled under a 10b5-1 plan
    -20

What happened after comparable sells

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

WDCOct 13, 2026 · close 380.71
Since filing Aug 27, 2026: -17.6%SPY +1.1% · excess -18.7%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0001266824-26-000188, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Aug 25, 2026MOption exercise
Common Stock10b5-1
+7$0.00$0112,153Aug 27, 2026
Aug 25, 2026FTax withholding
Common Stock10b5-1
-771$450.75$348k111,382Aug 27, 2026
Aug 25, 2026AGrant or award
Common Stock10b5-1
+3,878$0.00$0115,260Aug 27, 2026
Aug 26, 2026SOpen-market sale
Common Stock10b5-1
-476$450.78$215k114,784Aug 27, 2026
Aug 26, 2026MOption exercise
Common Stock10b5-1
+9$0.00$0114,793Aug 27, 2026
Aug 26, 2026FTax withholding
Common Stock10b5-1
-1,631$468.88$765k113,162Aug 27, 2026
Aug 27, 2026SOpen-market sale
Common Stock10b5-1
-1,007$478.36$482k112,155Aug 27, 2026
Aug 25, 2026MOption exercise
Dividend Equivalent Rightsderivative10b5-1
-8$0.00$0287Aug 27, 2026
Aug 26, 2026MOption exercise
Dividend Equivalent Rightsderivative10b5-1
-9$0.00$0278Aug 27, 2026

Related signals

Other insiders at WESTERN DIGITAL CORP and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
38Weak
WDCsell 3
WESTERN DIGITAL CORP
Vidyadhara K Gubbi
Chief of Global Operations
$825k
1,795 shares
-2%
7Weak
WDCsell 310b5-1
WESTERN DIGITAL CORP
Cynthia L Tregillis
Chief Legal Officer & Corp Sec
$195k
432 shares
-0%
60Notable
WDCsell 3
WESTERN DIGITAL CORP
Stephanie A Streeter
director
$2.5M
5,600 shares
-14%
11Weak
WDCsell 410b5-1
WESTERN DIGITAL CORP
Cynthia L Tregillis
Chief Legal Officer & Corp Sec
$417k
919 shares
-1%
45Moderate
WDCsell 310b5-1
WESTERN DIGITAL CORP
Irving Tan
Chief Executive Officer
$8.9M
20,000 shares
-3%
40Moderate
WDCsell 310b5-1
WESTERN DIGITAL CORP
Martin I Cole
director
$1.7M
3,808 shares
-15%
19Weak
WDCsell 310b5-1
WESTERN DIGITAL CORP
Martin I Cole
director
$89k
192 shares
-1%
5Weak
WDCsell 210b5-1
WESTERN DIGITAL CORP
Cynthia L Tregillis
Chief Legal Officer & Corp Sec
$428k
808 shares
-1%
40Moderate
WDCsell 410b5-1
WESTERN DIGITAL CORP
Martin I Cole
director
$1.7M
3,280 shares
-11%
26Weak
WDCsell 410b5-1
WESTERN DIGITAL CORP
Martin I Cole
director
$386k
720 shares
-3%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.