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Who owns Ultragenyx Pharmaceutical (RARE) stock

287 funds reported Ultragenyx Pharmaceutical (RARE) shares in their latest 13F filings, worth $3.7B in all. The largest holder is BlackRock ($356M). Last quarter 155 funds added to their stakes and 132 cut them. Members of Congress and other officials disclosed 2 trades (2 buys, 0 sales).

Largest holders of RARE (13F)Largest holders of RARE (13F)BlackRock$356MRTW Investments, LP$260MVanguard Group$236MVanguard Portfolio Management LLC$227MAQR Capital Management LLC$214MState Street$206MVanguard Capital Management LLC$143MTwo Sigma Investments, LP$121MSands Capital Management, LLC$105MJacobs Levy Equity Management$98.2M

Largest holders (13F)

FundSharesValueChangeQuarter
BlackRock10,654,276$356Mincrease2026-06-30
RTW Investments, LP7,796,895$260Mincrease2026-06-30
Vanguard Group10,263,815$236Mincrease2025-12-31
Vanguard Portfolio Management LLC6,790,135$227Mincrease2026-06-30
AQR Capital Management LLC6,560,809$214Mincrease2026-06-30
State Street6,158,766$206Mincrease2026-06-30
Vanguard Capital Management LLC4,296,491$143Mincrease2026-06-30
Two Sigma Investments, LP3,621,200$121Mincrease2026-06-30
Sands Capital Management, LLC3,158,368$105Mdecrease2026-06-30
Jacobs Levy Equity Management2,939,719$98.2Mincrease2026-06-30
Frontier Capital Management Co LLC2,847,936$95.1Mincrease2026-06-30
Geode Capital Management, LLC2,578,828$86.1Mincrease2026-06-30
Bellevue Group AG1,982,775$66.2Mdecrease2026-06-30
D. E. Shaw1,730,193$57.8Mincrease2026-06-30
Sofinnova Investments1,717,505$57.3Mdecrease2026-06-30

Trades by Congress and other officials

DateWhoTradeAmount
2026-03-03Gilbert Cisnerospurchase$1K–$15K
2026-02-18Gilbert Cisnerospurchase$1K–$15K

Ultragenyx Pharmaceutical's latest quarter

Ultragenyx Pharmaceutical, Q3 2026: revenue $173M (+8% year over year), operating margin -63.6%, net loss $118M, operating cash flow −$43.0M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most RARE stock?

By the latest 13F filings: BlackRock ($356M); RTW Investments, LP ($260M); Vanguard Group ($236M); Vanguard Portfolio Management LLC ($227M); AQR Capital Management LLC ($214M).

Has Congress traded RARE stock?

Officials disclosed 2 trades on file: 2 buys and 0 sales. The latest: Gilbert Cisneros, purchase on 2026-03-03.

What is the short interest in RARE?

20,145,283 shares were sold short at the 2026-10-15 settlement, -1.01% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.