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sellWeak cluster of 310b5-1 plan

Cynthia L Tregillis sold $195k of WDC

Chief Legal Officer & Corp Sec at WESTERN DIGITAL CORP. 432 shares at an average of $451.20, traded Sep 4, 2026, filed Sep 8, 2026.

Warning score
7
Value
$195k
432 shares
Holdings after
111,030
-0% from before
From 52-week low
+417%
low $90.32, close $467.31
From 52-week high
-37%
high $745.99, as of Sep 4, 2026

Score components

  • Role
    Officer
    +15
  • Trade size
    $195k at market
    +12
  • Share of holdings sold
    Sold 0.4% 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 9, 2026 · close 397.28
Since filing Sep 8, 2026: -16.8%SPY +1.9% · 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 0001266824-26-000199, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Sep 3, 2026MOption exercise
Common Stock10b5-1
+7$0.00$0112,16234 d ago
Sep 3, 2026FTax withholding
Common Stock10b5-1
-700$441.57$309k111,46234 d ago
Sep 4, 2026SOpen-market sale
Common Stock10b5-1
-432$451.20$195k111,03034 d ago
Sep 3, 2026MOption exercise
Dividend Equivalent Rightsderivative10b5-1
-7$0.00$027034 d ago

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%
60Notable
WDCsell 3
WESTERN DIGITAL CORP
Stephanie A Streeter
director
$2.5M
5,600 shares
-14%
0Weak
WDCsell10b5-1
WESTERN DIGITAL CORP
Gene M. Zamiska
SVP & Princ. Acctg Officer
$23k
313 shares
-1%
1Weak
WDCsell10b5-1
WESTERN DIGITAL CORP
Gene M. Zamiska
SVP & Princ. Acctg Officer
$46k
658 shares
-2%
0Weak
WDCsell10b5-1
WESTERN DIGITAL CORP
Gene M. Zamiska
SVP & Princ. Acctg Officer
$24k
376 shares
-1%
60Notable
WDCsell 3
WESTERN DIGITAL CORP
Robert Soderbery
EVP & GM, Flash Business
$2.1M
30,767 shares
-19%
45Moderate
WDCsell 310b5-1
WESTERN DIGITAL CORP
David Goeckeler
Chief Executive Officer
$5.4M
75,000 shares
-8%
41Moderate
WDCsell 3
WESTERN DIGITAL CORP
Gene M. Zamiska
SVP & Princ. Acctg Officer
$139k
1,993 shares
-6%

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.

Cynthia L Tregillis sold $195k of WDC | InsiderTell