Ultragenyx to Host Conference Call for Fourth Quarter and Full-Year 2023 Financial Results and Corporate Update

Ultragenyx Pharmaceutical Inc. (NASDAQ: RARE), a biopharmaceutical company focused on the development and commercialization of novel products for serious rare and ultrarare genetic diseases, today announced that it will host a conference call at 5:00 p.m. ET on Thursday, February 15, 2024, to discuss its financial results and corporate update for the fourth quarter and the year ending December 31, 2023.

The live and replayed webcast of the call will be available through the company’s website at https://ir.ultragenyx.com/events-presentations. To participate in the live call, please register by clicking on the following link (registration link) and you will be provided with dial-in details. The replay of the call will be available for 3 months.

About Ultragenyx Pharmaceutical Inc.Ultragenyx is a biopharmaceutical company committed to bringing novel products to patients for the treatment of serious rare and ultrarare genetic diseases. The company has built a diverse portfolio of approved therapies and product candidates aimed at addressing diseases with high unmet medical need and clear biology for treatment, for which there are typically no approved therapies treating the underlying disease.

The company is led by a management team experienced in the development and commercialization of rare disease therapeutics. Ultragenyx’s strategy is predicated upon time- and cost-efficient drug development, with the goal of delivering safe and effective therapies to patients with the utmost urgency.

For more information on Ultragenyx, please visit the company's website at: www.ultragenyx.com.

Contact Ultragenyx

InvestorsJoshua Higa(415) 475-6370

MediaCarolyn Wang(415) 225-5050