Ultragenyx Pharmaceutical Inc. (RARE) ownership: Top institutional holder: VANGUARD GROUP INC ($236.07M). Insider activity: Net Seller (0 buys, 20 sells). 4 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 10263815.00 | $236.07M | 2025-12-31 |
| BlackRock, Inc. | 7299598.00 | $152.93M | 2026-03-31 |
| BlackRock Fund Advisors | 1679460.00 | $118.08M | 2016-12-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5385992.00 | $112.84M | 2026-03-31 |
| STATE STREET CORP | 5021441.00 | $105.20M | 2026-03-31 |
| AQR CAPITAL MANAGEMENT LLC | 4578024.00 | $95.91M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4189831.00 | $87.78M | 2026-03-31 |
| RTW INVESTMENTS, LP | 3648795.00 | $76.44M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-01 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-14 | |
| Sell | null | 2026-05-14 | |
| Sell | null | 2026-05-14 | |
| Sell | null | 2026-05-14 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.