Gene M. Zamiska sold $376k of WDC
SVP, Global Accounting & Chief at WESTERN DIGITAL CORP. 4,988 shares at an average of $75.35, traded Aug 21, 2025, filed Aug 25, 2025.
Score components
- +15RoleOfficer
- +16Trade size$376k at market
- +5Share of holdings soldSold 14% of holdings
- +15Cluster4 insiders selling within 14 days
- -15Exercise and sellShares came from an option exercise in the same filing
- -2010b5-1 planPre-scheduled under a 10b5-1 plan
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.
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 0001266824-25-000156, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Aug 21, 2025 | MOption exercise Common Stock10b5-1 | +6 | $0.00 | $0 | 36,517 | Aug 25, 2025 |
| Aug 21, 2025 | FTax withholding Common Stock10b5-1 | -1,797 | $74.66 | $134k | 34,720 | Aug 25, 2025 |
| Aug 21, 2025 | SOpen-market sale Common Stock10b5-1 | -3,160 | $75.68 | $239k | 31,560 | Aug 25, 2025 |
| Aug 22, 2025 | SOpen-market sale Common Stock10b5-1 | -1,828 | $74.78 | $137k | 29,732 | Aug 25, 2025 |
| Aug 21, 2025 | MOption exercise Dividend Equivalent Rightsderivative10b5-1 | -6 | $0.00 | $0 | 50 | Aug 25, 2025 |
Related signals
Other insiders at WESTERN DIGITAL CORP and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 38Weak | WESTERN DIGITAL CORP | Vidyadhara K Gubbi Chief of Global Operations | $825k 1,795 shares | -2% | |
| 7Weak | WESTERN DIGITAL CORP | Cynthia L Tregillis Chief Legal Officer & Corp Sec | $195k 432 shares | -0% | |
| 60Notable | WESTERN DIGITAL CORP | Stephanie A Streeter director | $2.5M 5,600 shares | -14% | |
| 64Notable | WESTERN DIGITAL CORP | Kimberly Alexy director | $320k 2,000 shares | -56% | |
| 60Notable | WESTERN DIGITAL CORP | Vidyadhara K Gubbi Chief of Global Operations | $3.7M 22,820 shares | -15% | |
| 40Moderate | WESTERN DIGITAL CORP | Martin I Cole director | $976k 6,000 shares | -14% | |
| 47Moderate | WESTERN DIGITAL CORP | Cynthia L Tregillis Chief Legal Officer & Corp Sec | $450k 2,801 shares | -2% | |
| 53Moderate | WESTERN DIGITAL CORP | Kimberly Alexy director | $272k 1,768 shares | -33% | |
| 54Moderate | WESTERN DIGITAL CORP | Roxanne Oulman director | $278k 1,800 shares | -32% | |
| 33Weak | WESTERN DIGITAL CORP | Martin I Cole director | $1.6M 10,000 shares | -20% |
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.