Cynthia L. Tregillis is CLO & Secretary at WESTERN DIGITAL CORP (WDC). They have made 6 open-market trades across 1 company since 2025, most recently 2026-09-04.
CIK 0002057088
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 6 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| WDC | 111,030 | $36.8M |
Shares reported on the most recent Form 4, priced at the 2026-09-08 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| WDC | SELL · 10b5-1 | 2026-09-04 | 2026-09-08 | $451.20 | $195K | -7.1% | -17.2% | — |
| WDC | SELL · 10b5-1 | 2026-08-26 | 2026-08-27 | $469.51 | $696K | +4.2% | -2.0% | — |
| WDC | SELL · 10b5-1 | 2026-08-21 | 2026-08-24 | $454.12 | $417K | -1.3% | +5.9% | — |
| WDC | SELL · 10b5-1 | 2026-07-21 | 2026-07-21 | $529.63 | $428K | +3.5% | -10.9% | — |
| WDC | SELL · 10b5-1 | 2026-06-05 | 2026-06-05 | $545.60 | $236K | +33.3% | +8.0% | -17.3% |
| WDC | SELL · 10b5-1 | 2026-05-22 | 2026-05-27 | $509.53 | $266K | -3.1% | +7.9% | -17.1% |
| WDC | SELL · 10b5-1 | 2026-05-21 | 2026-05-22 | $458.87 | $49K | +13.8% | +44.9% | -7.3% |
| WDC | SELL · 10b5-1 | 2026-04-21 | 2026-04-22 | $377.09 | $137K | +14.3% | +25.1% | +41.7% |
| WDC | SELL | 2026-03-04 | 2026-03-05 | $268.27 | $2.5M | +25.5% | +21.7% | +137.7% |
| WDC | SELL | 2026-02-26 | 2026-02-27 | $286.11 | $61K | -0.6% | -7.0% | +96.3% |
| WDC | SELL | 2026-02-23 | 2026-02-24 | $282.33 | $124K | -12.6% | -2.5% | +87.0% |
| WDC | SELL | 2026-02-06 | 2026-02-06 | $270.49 | $1.8M | +1.7% | -6.3% | +65.8% |
| WDC | SELL | 2026-01-21 | 2026-01-21 | $229.00 | $102K | +9.5% | +15.7% | +55.6% |
| WDC | SELL | 2025-12-02 | 2025-12-03 | $160.57 | $900K | +11.1% | +21.2% | +61.8% |
| WDC | SELL · 10b5-1 | 2025-08-22 | 2025-08-25 | $74.78 | $2.1M | +16.4% | +38.7% | +90.8% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.