| SC 13G | 2018-01-10 | Capital International Investors | Ultragenyx Pharmaceutical Inc. | 4,411,165 | 10.3% | EDGAR |
| SC 13G/A | 2017-07-10 | FMR LLC | Ultragenyx Pharmaceutical Inc. | 3,806,612 | 9.0% | EDGAR |
| SC 13G/A | 2017-02-14 | FMR LLC | Ultragenyx Pharmaceutical Inc. | 5,885,088 | 14.4% | EDGAR |
| SC 13G/A | 2017-02-13 | VANGUARD GROUP INC | Ultragenyx Pharmaceutical Inc. | 2,833,316 | 6.9% | EDGAR |
| SC 13G/A | 2017-02-13 | Capital Research Global Investors | Ultragenyx Pharmaceutical Inc. | 5,004,859 | 12.2% | EDGAR |
| SC 13G/A | 2017-02-09 | WELLINGTON MANAGEMENT GROUP LLP | Ultragenyx Pharmaceutical Inc. | 5,255,191 | 12.9% | EDGAR |
| SC 13G/A | 2017-01-27 | BlackRock Inc. | Ultragenyx Pharmaceutical Inc. | 2,942,718 | 7.2% | EDGAR |
| SC 13G/A | 2016-03-10 | WELLINGTON MANAGEMENT GROUP LLP | Ultragenyx Pharmaceutical Inc. | 4,050,477 | 10.4% | EDGAR |
| SC 13G/A | 2016-02-16 | SMALLCAP WORLD FUND INC | Ultragenyx Pharmaceutical Inc. | 905,807 | 2.3% | EDGAR |
| SC 13G/A | 2016-02-16 | Capital Research Global Investors | Ultragenyx Pharmaceutical Inc. | 4,756,473 | 12.2% | EDGAR |
| SC 13G/A | 2016-02-12 | FMR LLC | Ultragenyx Pharmaceutical Inc. | 5,825,205 | 15.0% | EDGAR |
| SC 13G | 2016-02-11 | WELLINGTON MANAGEMENT GROUP LLP | Ultragenyx Pharmaceutical Inc. | 2,297,234 | 5.9% | EDGAR |
| SC 13G | 2016-02-11 | VANGUARD GROUP INC | Ultragenyx Pharmaceutical Inc. | 2,393,587 | 6.2% | EDGAR |
| SC 13G | 2016-01-28 | BlackRock Inc. | Ultragenyx Pharmaceutical Inc. | 3,294,747 | 8.5% | EDGAR |
| SC 13G/A | 2015-03-10 | BlackRock Inc. | Ultragenyx Pharmaceutical Inc. | 1,690,600 | 4.8% | EDGAR |
| SC 13G/A | 2015-02-13 | FMR LLC | Ultragenyx Pharmaceutical Inc. | 4,788,087 | 15.0% | EDGAR |
| SC 13G/A | 2015-02-13 | FIL Ltd | Ultragenyx Pharmaceutical Inc. | 517,014 | 1.6% | EDGAR |
| SC 13G/A | 2015-02-13 | Capital Research Global Investors | Ultragenyx Pharmaceutical Inc. | 3,907,586 | 12.2% | EDGAR |
| SC 13G | 2015-02-13 | SMALLCAP WORLD FUND INC | Ultragenyx Pharmaceutical Inc. | 1,628,457 | 5.1% | EDGAR |
| SC 13G | 2015-02-13 | TPG Group Holdings (SBS) Advisors, Inc. | Ultragenyx Pharmaceutical Inc. | 1,596,420 | 4.6% | EDGAR |