| 日期 | 代碼 | 券商 | 原評等→升級後評等 | 新目標價 |
| 2011/10/6 | PLCM | Argus | Hold >> Buy | 28 |
| 2011/10/4 | PLCM | Barclays Capital | Equal Weight >> Overweight | $25 >> $28 |
| 2011/1/19 | PLCM | Wedbush | Neutral >> Outperform | $38 >> $48 |
| 2011/1/11 | PLCM | RBC Capital Mkts | Sector Perform >> Outperform | $45 >> $45 |
| 2010/3/24 | PLCM | William Blair | Mkt Perform >> Outperform | |