Ultragenyx Pharmaceutical Inc.: which funds bought and sold
Institutions that bought and sold Ultragenyx Pharmaceutical shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.
Between March 31, 2026 and June 30, 2026, 171 institutions that filed 13F reports for both quarters added to or opened positions in Ultragenyx Pharmaceutical, and 141 cut or closed them. Together they added a net 8.7M shares, +8.9% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 6.1M shares (+16.5%); index fund managers were net buyers of 7.4M shares (+28.6%). 55 opened a new position and 43 sold out entirely.
Bought, Q2 2026 171 institutions, 55 of them new holders Sold, Q2 2026 141 institutions, 43 of them sold out
Net change, all compared +8.7M shares (+8.9%)
Net change, active managers +6.1M shares (+16.5%), 26 bought, 30 sold
Buyers versus sellers
171 bought 36 141 sold
Active managers and hedge funds 26 bought · 30 sold · +6.1M
Index fund managers 10 bought · 1 sold · +7.4M
Other institutions 135 bought · 110 sold · −4.7M
Biggest buyers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| RTW Investments, LP Hedge fund | +4.1M +113.7% | 7.8M | $260M |
| Blackrock, Inc. Index funds | +3.4M +46.0% | 10.7M | $356M |
| AQR Capital Management LLC Hedge fund | +2.0M +43.3% | 6.6M | $214M |
| Jacobs Levy Equity Management, Inc Active manager | +1.5M +105.4% | 2.9M | $98.2M |
| Mpm Bioimpact LLC | +1.4M New position | 1.4M | $47.4M |
| Two Sigma Investments, LP Hedge fund | +1.4M +64.2% | 3.6M | $121M |
| Vanguard Portfolio Management LLC Index funds | +1.4M +26.1% | 6.8M | $227M |
| State Street Corp Index funds | +1.1M +22.6% | 6.2M | $206M |
| Adage Capital Partners Gp, L.L.C. Hedge fund | +1.1M +229.2% | 1.6M | $52.8M |
| Jefferies Financial Group Inc. | +914K +5902.2% | 930K | $31M |
| Geode Capital Management, LLC Index funds | +729K +39.4% | 2.6M | $86.1M |
| Frontier Capital Management Co LLC Active manager | +657K +30.0% | 2.8M | $95.1M |
| Panagora Asset Management Inc Active manager | +586K New position | 586K | $19.6M |
| Price T Rowe Associates Inc Active manager | +552K +68.7% | 1.4M | $45.3M |
| D. E. Shaw & Co., Inc. Hedge fund | +469K +37.2% | 1.7M | $57.8M |
| Toronto Dominion Bank | +415K +256072.8% | 415K | $13.9M |
| Northern Trust Corp Index funds | +385K +71.8% | 920K | $30.7M |
| Russell Investments Group, Ltd. | +381K +94.6% | 784K | $26.2M |
| FMR LLC Active manager | +290K +100.8% | 577K | $19.3M |
| Ensign Peak Advisors, Inc | +284K +4227.0% | 291K | $9.7M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| RTW Investments, LP Hedge fund | +4.1M +113.7% | 7.8M | $260M |
| AQR Capital Management LLC Hedge fund | +2.0M +43.3% | 6.6M | $214M |
| Jacobs Levy Equity Management, Inc Active manager | +1.5M +105.4% | 2.9M | $98.2M |
| Two Sigma Investments, LP Hedge fund | +1.4M +64.2% | 3.6M | $121M |
| Adage Capital Partners Gp, L.L.C. Hedge fund | +1.1M +229.2% | 1.6M | $52.8M |
| Frontier Capital Management Co LLC Active manager | +657K +30.0% | 2.8M | $95.1M |
| Panagora Asset Management Inc Active manager | +586K New position | 586K | $19.6M |
| Price T Rowe Associates Inc Active manager | +552K +68.7% | 1.4M | $45.3M |
| D. E. Shaw & Co., Inc. Hedge fund | +469K +37.2% | 1.7M | $57.8M |
| FMR LLC Active manager | +290K +100.8% | 577K | $19.3M |
Biggest sellers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Assenagon Asset Management S.A. | −2.0M −89.3% | 242K | $8.1M |
| Citadel Advisors LLC Hedge fund | −1.9M −90.0% | 211K | $7M |
| Sofinnova Investments, Inc. | −1.4M −45.4% | 1.7M | $57.3M |
| Wellington Management Group LLP Active manager | −1.4M −52.6% | 1.3M | $41.8M |
| Jones Hill Capital LP | −1.2M Sold out | 0 | — |
| Millennium Management LLC Hedge fund | −1.0M −57.1% | 761K | $25.4M |
| Point72 Asset Management, L.P. Hedge fund | −893K Sold out | 0 | — |
| HRT Financial LP | −613K Sold out | 0 | — |
| Catalio Capital Management, LP | −535K −62.8% | 316K | $10.6M |
| Schonfeld Strategic Advisors LLC Hedge fund | −442K −89.3% | 53K | $1.8M |
| Newtyn Management, LLC | −400K Sold out | 0 | — |
| Bellevue Group AG | −397K −16.7% | 2.0M | $66.2M |
| Balyasny Asset Management L.P. Hedge fund | −384K Sold out | 0 | — |
| Susquehanna International Group, LLP | −344K −65.5% | 181K | $6M |
| Ikarian Capital, LLC | −317K −65.7% | 166K | $5.5M |
| Connor, Clark & Lunn Investment Management Ltd. | −309K −61.8% | 192K | $6.4M |
| Rock Springs Capital Management LP Hedge fund | −251K −20.6% | 968K | $32.3M |
| Parkman Healthcare Partners LLC | −235K Sold out | 0 | — |
| Motley Fool Wealth Management, LLC | −223K Sold out | 0 | — |
| Sphera Funds Management Ltd. | −221K −27.3% | 588K | $19.6M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Citadel Advisors LLC Hedge fund | −1.9M −90.0% | 211K | $7M |
| Wellington Management Group LLP Active manager | −1.4M −52.6% | 1.3M | $41.8M |
| Millennium Management LLC Hedge fund | −1.0M −57.1% | 761K | $25.4M |
| Point72 Asset Management, L.P. Hedge fund | −893K Sold out | 0 | — |
| Schonfeld Strategic Advisors LLC Hedge fund | −442K −89.3% | 53K | $1.8M |
| Balyasny Asset Management L.P. Hedge fund | −384K Sold out | 0 | — |
| Rock Springs Capital Management LP Hedge fund | −251K −20.6% | 968K | $32.3M |
| Voloridge Investment Management, LLC Hedge fund | −185K −13.0% | 1.2M | $41.5M |
| Fred Alger Management, LLC Active manager | −155K −52.0% | 143K | $4.8M |
| Renaissance Technologies LLC Hedge fund | −148K −26.3% | 414K | $13.8M |
New positions
| Institution | Shares | Value June 30, 2026 |
|---|---|---|
| Mpm Bioimpact LLC | 1.4M | $47.4M |
| Panagora Asset Management IncActive manager | 586K | $19.6M |
| Ghisallo Capital Management LLCHedge fund | 150K | $5M |
| Apollon Wealth Management, LLC | 123K | $4.1M |
| Diversified Trust Co | 42K | $1.4M |
| Focus Partners Wealth | 25K | $839,993 |
| Stonepine Capital Management, LLC | 25K | $834,750 |
| Voya Investment Management LLC | 18K | $616,179 |
| Intech Investment Management LLCActive manager | 17K | $578,181 |
| Prudential Financial Inc | 16K | $537,579 |
Sold out
| Institution | Shares | Value March 31, 2026 |
|---|---|---|
| Jones Hill Capital LP | 1.2M | $24.4M |
| Point72 Asset Management, L.P.Hedge fund | 893K | $18.7M |
| HRT Financial LP | 613K | $12.8M |
| Newtyn Management, LLC | 400K | $8.4M |
| Balyasny Asset Management L.P.Hedge fund | 384K | $8.1M |
| Parkman Healthcare Partners LLC | 235K | $4.9M |
| Motley Fool Wealth Management, LLC | 223K | $4.7M |
| Jane Street Group, LLC | 174K | $3.6M |
| Natixis | 82K | $1.7M |
| Neo Ivy Capital Management | 74K | $1.5M |
Who holds the shares
- Institutions reporting
- 309
- Ten largest holders
- 51.3% of 13F-reported shares
- Index fund managers
- 31.0% of 13F-reported shares
- Active managers and hedge funds
- 40.4% of 13F-reported shares
| Type | Bought | Sold | New | Sold out | Net change in shares | Net % |
|---|---|---|---|---|---|---|
| Active managers and hedge funds | 26 | 30 | 5 | 7 | +6.1M | +16.5% |
| Index fund managers | 10 | 1 | 1 | 0 | +7.4M | +28.6% |
| Other institutions | 135 | 110 | 49 | 36 | −4.7M | −13.4% |
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