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Western Digital stock timeline
A year of the price with every insider trade, planned sale, earnings report and material 8-K marked
252 sessions+61.6% to $263.78
Western Digital (WDC) stock rose 62% over the last 252 sessions, to $263.78. On the way it reported 0 quarters, its insiders filed no open-market trades (10b5-1 plan sales aside) and 11 Form 144 notices of planned sales, and the company filed 2 material 8-Ks. Each is marked on the price and listed with what the stock did next.
Each mark, and what followed
| Date | Kind | What | Next session | 5 sessions | 21 sessions |
|---|---|---|---|---|---|
| Oct 29, 2026 | Form 144 | Form 144: Martin I Cole plans to sell $1.6M | −0.3% (+0.1% vs SPY) | −20.2% (−19.5% vs SPY) | — |
| Oct 21, 2026 | Form 144 | Form 144: Cynthia Lock Tregillis plans to sell $307K | +3.8% (+3.3% vs SPY) | +4.4% (+4.4% vs SPY) | — |
| Sep 4, 2026 | Form 144 | Form 144: Cynthia Lock Tregillis plans to sell $195K | +5.7% (+6.1% vs SPY) | +1.3% (+2.5% vs SPY) | +0.1% (−0.4% vs SPY) |
| Sep 4, 2026 | Form 144 | Form 144: Vidyadhara K Gubbi plans to sell $825K | +5.7% (+6.1% vs SPY) | +1.3% (+2.5% vs SPY) | +0.1% (−0.4% vs SPY) |
| Aug 31, 2026 | Form 144 | Form 144: Stephanie A Streeter plans to sell $4.5M | −2.0% (−1.7% vs SPY) | +1.7% (+1.6% vs SPY) | −1.3% (−0.8% vs SPY) |
| Aug 27, 2026 | Form 144 | Form 144: Cynthia Lock Tregillis plans to sell $482K | −1.5% (−2.1% vs SPY) | −4.3% (−4.2% vs SPY) | −2.6% (−3.5% vs SPY) |
| Aug 26, 2026 | Form 144 | Form 144: Cynthia Lock Tregillis plans to sell $215K | +3.9% (+3.9% vs SPY) | −0.1% (+0.5% vs SPY) | −0.1% (−0.5% vs SPY) |
| Aug 24, 2026 | Form 144 | Form 144: Cynthia Lock Tregillis plans to sell $305K | −5.4% (−5.1% vs SPY) | 0.0% (−0.5% vs SPY) | +1.1% (−0.1% vs SPY) |
| Aug 21, 2026 | Form 144 | Form 144: Cynthia Lock Tregillis plans to sell $112K | −2.1% (−2.5% vs SPY) | −1.5% (−2.6% vs SPY) | −4.5% (−6.2% vs SPY) |
| Aug 11, 2026 | Form 144 | Form 144: Irving Tan plans to sell $8.9M | −0.1% (+0.2% vs SPY) | +20.1% (+20.2% vs SPY) | +9.6% (+11.0% vs SPY) |
| Jul 21, 2026 | Form 144 | Form 144: Cynthia Lock Tregillis plans to sell $428K | +11.8% (+11.0% vs SPY) | +2.1% (+2.5% vs SPY) | +1.8% (−1.6% vs SPY) |
| May 28, 2026 | 8-K | Directors and officers: departures, appointments, pay | +0.1% (−0.4% vs SPY) | +11.3% (+10.8% vs SPY) | +10.1% (+12.7% vs SPY) |
| Nov 24, 2025 | 8-K | Directors and officers: departures, appointments, pay | +2.9% (+2.0% vs SPY) | +5.8% (+3.9% vs SPY) | +17.5% (+14.0% vs SPY) |
What this kind of 8-K usually did
| Item | 8-Ks | Next session, median | Up next session | 21 sessions, median | Typical size |
|---|---|---|---|---|---|
| 5.02 Directors and officers: departures, appointments, pay | 39,174 | −0.1% | 48% | +0.7% | ±1.4% |
Across every company in the move-odds universe, measured from the close before the filing. Every 8-K item ranked →
Western Digital: every quarter → Live insider trades →
Prices are daily closes; filings and trades are as filed with the SEC (Form 4 within two business days of the trade, 8-K within four of the event). Moves after a mark are the stock's close-to-close change and the same for SPY; they describe the record, not what the next one will do. Not investment advice.