Exhibit 99.1 Contacts Ultragenyx Pharmaceutical Inc. Investors Joshua Higa ir@ultragenyx.com Ultragenyx Reports First Quarter 2024 Financial Results and Corporate Update First quarter total revenue of $109 million, Crysvita® revenue of $83 million and Dojolvi® revenue of $16 million Reaffirmed 2024 expected total revenue guidance between $500 million to $530 million, Crysvita revenue of $375 million to $400 million, and Dojolvi revenue of $75 million to $80 million Presented positive interim Phase 1/2 data ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K ☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 001-36276 Ultragenyx Pharmaceutical Inc. (Exact name of registrant as specified in its charter) Delaware 27-2546083 (State or other jurisdiction of inc ...

Call End: Ultragenyx Pharmaceutical, Inc. (NASDAQ:RARE) Q4 2023 Earnings Conference Call February 15, 2024, 05:00 PM ET Company Participants Joshua Higa - Vice President of Investor Relations Emil Kakkis - Chief Executive Officer & President Erik Harris - Chief Commercial Officer Howard Horn - Chief Financial Officer Eric Crombez - Chief Medical Officer Conference Call Participants Gena Wang - Barclays Maurice Raycroft - Jefferies Anupam Rama - JPMorgan Tazeen Ahmad - Bank of America Dae Gon Ha - Stifel Me ...

Ultragenyx Pharmaceutical, Inc. (NASDAQ:RARE) Q3 2023 Earnings Conference Call November 2, 2023 5:00 PM ET Company Participants Joshua Higa - Vice President of Investor Relations Emil Kakkis - Chief Executive Officer & President Erik Harris - Chief Commercial Officer Howard Horn - Chief Financial Officer Eric Crombez - Chief Medical Officer Conference Call Participants Anupam Rama - JPMorgan Dae Gon Ha - Stifel Michael Riad - Morgan Stanley Tazeen Ahmad - Bank of America Kristen Kluska - Cantor Fitzgerald M ...

ultrageny% Cautionary note regarding forward-looking statements: This presentation contains forward-looking statements, including, but not limited to, statements regarding our expectations and projections regarding our future operating results and financial performance, anticipated cost or expense reductions, plans with respect to commercializing our product and product candidates, our translational research program, expectations regarding our manufacturing capabilities, the expected timing of release of ad ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934. For the quarterly period ended September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934. For the transition period from to . Commission File No. 001-36276 ULTRAGENYX PHARMACEUTICAL INC. (Exact name of registrant as specified in its charter) (State or other jurisdiction of i ...

Ultragenyx Pharmaceutical, Inc. (NASDAQ:RARE) Q2 2023 Earnings Conference Call August 3, 2023 5:00 PM ET Company Participants Joshua Higa - Director, IR & Corporate Communications Emil Kakkis - Founder, President, CEO & Director Eric Crombez - Chief Medical Officer & EVP Aaron Olsen - SVP, Corporate Strategy & Finance Erik Harris - EVP & Chief Commercial Officer Conference Call Participants Gena Wang - Barclays Bank Liisa Bayko - Evercore ISI Maurice Raycroft - Jefferies Tommie Reerink - Goldman Sachs Group ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934. For the quarterly period ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934. For the transition period from to . Commission File No. 001-36276 ULTRAGENYX PHARMACEUTICAL INC. (Exact name of registrant as specified in its charter) Delaware 27-2546083 (State or other ju ...

Ultragenyx Pharmaceutical Inc. (NASDAQ:RARE) Q1 2023 Earnings Conference Call May 4, 2023 5:00 PM ET Company Participants Joshua Higa - Vice President and Head of Investor Relations Emil Kakkis - Founder, President and Chief Executive Officer Erik Harris - Chief Commercial Officer and Executive Vice President Eric Crombez - Chief Medical Officer and Executive Vice President Aaron Olsen - Senior Vice President of Corporate Strategy and Finance Ted Huizenga - Chief Accounting Officer Conference Call Participa ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934. For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934. For the transition period from to . Commission File No. 001-36276 ULTRAGENYX PHARMACEUTICAL INC. (Exact name of registrant as specified in its charter) Delaware 27-2546083 (State or other j ...