| SC 13G/A | 2016-02-12 | FMR LLC | Xencor Inc | 6,071,550 | 15.0% | EDGAR |
| SC 13G/A | 2016-02-04 | PRIMECAP MANAGEMENT CO/CA/ | Xencor Inc | 3,616,914 | 8.9% | EDGAR |
| SC 13G/A | 2016-02-04 | PRIMECAP MANAGEMENT CO/CA/ | Xencor Inc | 4,301,837 | 10.6% | EDGAR |
| SC 13D/A | 2015-12-01 | STAFFORD JOHN S III | Xencor Inc | 7,294,740 | 18.0% | EDGAR |
| SC 13G | 2015-07-10 | FMR LLC | Xencor Inc | 4,693,014 | 11.6% | EDGAR |
| SC 13G | 2015-05-14 | RA CAPITAL MANAGEMENT, LLC | Xencor Inc | 3,156,844 | 7.8% | EDGAR |
| SC 13G/A | 2015-02-17 | PERCEPTIVE ADVISORS LLC | Xencor Inc | 1,927,171 | 6.1% | EDGAR |
| SC 13G/A | 2015-02-13 | FMR LLC | Xencor Inc | 1,440,419 | 4.6% | EDGAR |
| SC 13G/A | 2015-02-13 | PRIMECAP MANAGEMENT CO/CA/ | Xencor Inc | 1,582,600 | 5.0% | EDGAR |
| SC 13G/A | 2015-02-10 | STAFFORD JOHN S JR | Xencor Inc | 1,642,741 | 5.2% | EDGAR |
| SC 13G | 2015-02-05 | ADAGE CAPITAL PARTNERS GP LLC | Xencor Inc | 1,600,000 | 5.1% | EDGAR |
| SC 13D/A | 2014-06-20 | STAFFORD JOHN S III | Xencor Inc | 7,732,878 | 24.7% | EDGAR |
| SC 13G | 2014-02-14 | FMR LLC | Xencor Inc | 1,700,000 | 5.4% | EDGAR |
| SC 13G | 2014-02-14 | PERCEPTIVE ADVISORS LLC | Xencor Inc | 1,568,672 | 5.3% | EDGAR |
| SC 13G | 2014-01-13 | PRIMECAP MANAGEMENT CO/CA/ | Xencor Inc | 1,743,850 | 5.9% | EDGAR |
| SC 13D | 2013-12-16 | STAFFORD JOHN S III | Xencor Inc | 7,841,203 | 25.0% | EDGAR |
| SC 13G | 2013-12-16 | STAFFORD JOHN S JR | Xencor Inc | 1,642,741 | 5.2% | EDGAR |
| SC 13G | 2013-12-10 | RA CAPITAL MANAGEMENT, LLC | Xencor Inc | 2,725,000 | 8.7% | EDGAR |