| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G | 2015-02-03 | BlackRock Inc. | Ultragenyx Pharmaceutical Inc. | 1,627,062 | 5.1% | EDGAR |
| SC 13G | 2014-09-10 | Capital Research Global Investors | Ultragenyx Pharmaceutical Inc. | 3,778,676 | 11.9% | EDGAR |
| SC 13G/A | 2014-09-09 | FMR LLC | Ultragenyx Pharmaceutical Inc. | 3,328,532 | 10.5% | EDGAR |
| SC 13G | 2014-08-11 | FIL Ltd | Ultragenyx Pharmaceutical Inc. | 1,654,028 | 5.2% | EDGAR |
| SC 13G | 2014-02-14 | FMR LLC | Ultragenyx Pharmaceutical Inc. | 3,260,240 | 10.9% | EDGAR |