Irving Tan is CEO at WESTERN DIGITAL CORP (WDC). They have made 12 open-market trades across 2 companies since 2018, most recently 2026-09-20.
CIK 0001729518
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 12 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| WDC | 265,612 | $88.1M |
| CSCO | 167,538 | $18.0M |
| SWK | 6,033 | $558K |
| Total | $106.7M |
Shares reported on the most recent Form 4, priced at the 2026-09-21 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 | 2026-08-11 | 2026-08-12 | $444.97 | $8.9M | -3.9% | -1.3% | — |
| WDC | SELL · 10b5-1 | 2026-05-01 | 2026-05-05 | $411.84 | $8.2M | +2.1% | +21.9% | +11.8% |
| WDC | SELL | 2026-02-02 | 2026-02-04 | $255.44 | $5.1M | +11.0% | -4.2% | +81.7% |
| WDC | SELL · 10b5-1 | 2025-11-03 | 2025-11-05 | $150.52 | $5.5M | +1.5% | +5.6% | +81.4% |
| WDC | SELL · 10b5-1 | 2025-08-19 | 2025-08-21 | $75.90 | $1.3M | +15.0% | +50.3% | +105.9% |
| WDC | SELL · 10b5-1 | 2025-05-13 | 2025-05-14 | $48.19 | $1.1M | +5.4% | +13.3% | +54.4% |
| CSCO | SELL | 2020-11-24 | 2020-11-24 | $42.37 | $325K | +3.7% | +4.1% | +6.2% |
| CSCO | SELL | 2020-11-17 | 2020-11-19 | $42.09 | $4.0M | +6.9% | +9.3% | +12.7% |
| CSCO | SELL | 2020-09-15 | 2020-09-15 | $40.68 | $289K | -5.6% | -1.8% | +8.6% |
| CSCO | SELL | 2020-08-17 | 2020-08-19 | $42.08 | $349K | +0.8% | -4.9% | +0.0% |
| CSCO | SELL | 2020-05-18 | 2020-05-20 | $44.99 | $373K | +3.2% | -0.3% | -7.6% |
| CSCO | SELL | 2020-02-18 | 2020-02-20 | $46.52 | $380K | -14.3% | -26.0% | -2.8% |
| CSCO | SELL | 2019-11-25 | 2019-11-26 | $45.36 | $2.5M | -3.2% | +5.5% | -3.0% |
| CSCO | SELL | 2019-11-18 | 2019-11-20 | $44.81 | $962K | -1.9% | +5.1% | +3.2% |
| CSCO | SELL | 2019-09-17 | 2019-09-19 | $49.42 | $2.3M | -3.1% | -3.9% | -5.4% |
| CSCO | SELL | 2018-12-03 | 2018-12-06 | $48.43 | $1.4M | -8.5% | -10.3% | +7.3% |
| CSCO | SELL | 2018-09-14 | 2018-09-14 | $47.38 | $6.5M | +2.5% | -5.4% | +0.5% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.