| 日期 | 代碼 | 券商 | 原評等→升級後評等 | 新目標價 |
| 2009/9/22 | NKTR | BMO Capital Markets | Market Perform >> Outperform | |
| 2006/9/28 | NKTR | Miller Johnson | Market Perform Outperform | 18 |
| 2006/8/18 | NKTR | Morgan Stanley | Underweight Equal-weight | |
| 2005/1/27 | NKTR | Pacific Growth Equities | Equal Weight->Over Weight | |
| 2004/12/1 | NKTR | Sun Trust Rbsn Humphrey | Neutral->Buy | 26 |