| 日期 | 代碼 | 券商 | 原評等→升級後評等 | 新目標價 |
| 2011/11/21 | WDC | Barclays Capital | Equal Weight >> Overweight | $27 >> $35 |
| 2011/6/15 | WDC | Standpoint Research | Hold >> Buy | 42 |
| 2011/1/19 | WDC | Rodman & Renshaw | Mkt Perform >> Mkt Outperform | 38 |
| 2010/10/28 | WDC | Barclays Capital | Equal Weight >> Overweight | $31 >> $39 |
| 2010/7/23 | WDC | Standpoint Research | Hold >> Buy | 35 |