Michael D. Cordano is President & COO at WESTERN DIGITAL CORP (WDC). They have made 24 open-market trades across 2 companies since 2013, most recently 2026-10-13.
CIK 0001201490
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 24 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| WDC | 227,381 | $75.5M |
| MU | 43,683 | $38.4M |
| Total | $113.8M |
Shares reported on the most recent Form 4, priced at the 2026-10-15 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 |
|---|---|---|---|---|---|---|---|---|
| MU | SELL | 2026-04-14 | 2026-04-16 | $435.00 | $1.5M | +8.0% | +46.0% | +93.6% |
| MU | SELL | 2026-04-09 | 2026-04-13 | $420.81 | $1.4M | +10.9% | +84.9% | +115.7% |
| WDC | SELL | 2020-02-12 | 2020-02-14 | $70.50 | $1.4M | -18.5% | -50.9% | -40.4% |
| WDC | SELL · 10b5-1 | 2020-02-05 | 2020-02-07 | $70.16 | $14K | +4.0% | -28.6% | -37.0% |
| WDC | SELL | 2020-01-31 | 2020-02-04 | $66.05 | $1.1M | -0.3% | -16.9% | -42.9% |
| WDC | SELL | 2020-01-23 | 2020-01-23 | $70.80 | $2.1M | -4.6% | -11.4% | -44.3% |
| WDC | SELL | 2020-01-14 | 2020-01-16 | $70.15 | $285K | -4.3% | -2.1% | -38.9% |
| WDC | SELL | 2019-12-13 | 2019-12-17 | $56.74 | $872K | +9.1% | +20.1% | -41.8% |
| WDC | SELL · 10b5-1 | 2019-11-05 | 2019-11-07 | $55.09 | $17K | -10.4% | -9.3% | +28.5% |
| WDC | SELL | 2019-10-31 | 2019-11-04 | $55.31 | $1.1M | -8.4% | -13.8% | +22.2% |
| WDC | SELL | 2017-12-19 | 2017-12-21 | $85.00 | $119K | +1.6% | +6.6% | +27.2% |
| WDC | SELL | 2017-11-13 | 2017-11-13 | $88.13 | $246K | +3.4% | -6.8% | -8.3% |
| WDC | SELL | 2017-09-18 | 2017-09-20 | $88.70 | $1.7M | -3.2% | +0.3% | -2.2% |
| WDC | SELL | 2017-08-14 | 2017-08-16 | $82.63 | $560K | +5.9% | +3.6% | +7.1% |
| WDC | SELL | 2017-07-20 | 2017-07-20 | $94.96 | $915K | -9.5% | -11.4% | -9.7% |
| WDC | SELL | 2017-06-12 | 2017-06-13 | $85.00 | $962K | +3.4% | +2.8% | -3.2% |
| WDC | SELL | 2017-05-08 | 2017-05-08 | $90.34 | $896K | -3.2% | +1.1% | -9.0% |
| WDC | SELL | 2017-04-07 | 2017-04-11 | $85.07 | $2.3M | -0.6% | +4.0% | +3.5% |
| WDC | SELL | 2017-02-06 | 2017-02-07 | $79.00 | $466K | -3.8% | -4.7% | +15.4% |
| WDC | SELL | 2017-01-09 | 2017-01-11 | $70.90 | $836K | +7.2% | +9.1% | +21.3% |
| WDC | SELL | 2016-12-21 | 2017-01-03 | $71.25 | $121K | +2.0% | +13.9% | +18.1% |
| WDC | SELL | 2016-12-05 | 2016-12-07 | $66.91 | $1.0M | -1.2% | +1.8% | +11.0% |
| WDC | SELL | 2016-12-01 | 2016-12-05 | $65.00 | $383K | +9.4% | +13.6% | +23.7% |
| WDC | SELL | 2016-11-07 | 2016-11-08 | $56.41 | $100K | +9.2% | +22.3% | +41.4% |
| WDC | SELL | 2016-10-03 | 2016-10-04 | $59.15 | $1.1M | -6.2% | -5.7% | +18.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.