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, 2025 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 ...

Financial Data and Key Metrics Changes - In Q1 2025, Ultragenyx reported revenue of $139 million, representing a 28% increase compared to Q1 2024 [18] - The net loss for the quarter was $151 million, or $1.57 per share, with total operating expenses of $282 million [20] - Cash, cash equivalents, and marketable securities stood at $563 million as of March 31, 2025 [20] Business Line Data and Key Metrics Changes - Crysvita generated $103 million in revenue, with contributions of $41 million from North America, $55 million from Latin America and Turkey, and $7 million from Europe, marking a 25% growth over 2024 [18] - DeJolvi contributed $17 million, consistent with its expected growth trajectory, while EVKYSA generated $11 million as demand builds [19] - Mepsevii contributed $8 million as the company continues to treat patients in this ultra-rare indication [19] Market Data and Key Metrics Changes - In Latin America and Turkey, Crysvita revenue grew by 52% over 2024, driven by successful reimbursement negotiations [18] - The U.S. market for Crysvita is expected to continue growing as the company identifies new pediatric and adult patients [11] - The EMEA region saw over 260 patients treated with DERJOVY under named patient sales, with strong demand noted particularly in France [13] Company Strategy and Development Direction - The company is focused on expanding its commercial operations globally while preparing for new product launches in the U.S. and worldwide [5] - Ultragenyx is advancing multiple late-stage programs, including UX143 for osteogenesis imperfecta and GTX-102 for Angelman syndrome, with data expected in 2026 [7][26] - The company is on track to submit two Biologics License Applications (BLAs) in 2025, with one currently under review and another expected mid-year [8][9] Management's Comments on Operating Environment and Future Outlook - Management expressed confidence that 2025 will be a transformational year, with expectations of significant revenue growth and multiple clinical data readouts [32] - The company is optimistic about the demand for its products, particularly in Latin America and the pediatric and adult XLH markets in the U.S. [21] - Management acknowledged the evolving tariff landscape but does not expect material exposure for any products, including Crysvita [23] Other Important Information - The company is actively monitoring regulatory interactions and has scheduled inspections of manufacturing facilities and clinical sites [9] - The company expects net cash used in operations to decrease in the remaining quarters of 2025, aiming for full-year GAAP profitability by 2027 [21] Q&A Session Summary Question: Insights on setrusumab and the second interim analysis - Management discussed the variability in fracture rates among patients and the statistical methods used to analyze data, emphasizing confidence in achieving significant results [35][39] Question: Likelihood of success if the study moves to a third interim read - Management expressed confidence in hitting the p-value threshold based on observed data trends and the size of the study [46][49] Question: Impact of recent CBER nomination on the rare disease space - Management noted concerns about the nomination but emphasized the importance of maintaining accelerated approval pathways for rare diseases [51][54] Question: Enrollment status for the Angelman program - Management confirmed that all global sites for the Angelman program are active and screening patients [66][68] Question: Clarification on the timing of interim data release - Management indicated that data cleaning and analysis for the interim results would take approximately eight weeks, with a commitment to timely communication of results [90][92]

Financial Data and Key Metrics Changes - In Q1 2025, the company reported revenue of $139 million, representing a 28% increase compared to Q1 2024 [15] - The net loss for the quarter was $151 million, or $1.57 per share, with total operating expenses of $282 million [18] - Cash, cash equivalents, and marketable securities stood at $563 million as of March 31, 2025 [18] - The company reaffirmed its 2025 revenue guidance of $640 million to $670 million, indicating a growth of 14% to 20% over 2024 [19] Business Line Data and Key Metrics Changes - Crysvita generated $103 million in revenue, with significant contributions from North America ($41 million), Latin America and Turkey ($55 million), and Europe ($7 million), marking a 25% growth over 2024 [16] - DeJolvi contributed $17 million, while EVKYSA and Mepsevii contributed $11 million and $8 million, respectively [17] - In Latin America and Turkey, Crysvita saw a remarkable 52% growth over 2024 [16] Market Data and Key Metrics Changes - The commercial team in Latin America reported approximately 775 patients on reimbursed therapy for Crysvita, with expectations for continued growth following successful reimbursement negotiations [8] - In the U.S., the adult patient population for Crysvita has exceeded initial expectations, contributing to revenue growth [9] - The EMEA region showed strong demand for DERJOVY, with over 260 patients treated under named patient sales [11] Company Strategy and Development Direction - The company is focused on expanding its commercial operations outside the U.S. and preparing for new product launches [3] - The development pipeline includes multiple late-stage programs, with significant progress in Phase III studies for various treatments [5] - The company is working on two separate Biologics License Applications (BLAs), with one under review and another expected to be submitted mid-2025 [6] Management's Comments on Operating Environment and Future Outlook - Management expressed confidence in 2025 being a transformational year, with expectations for substantial revenue growth and successful clinical data readouts [29] - The company is actively monitoring regulatory changes and does not anticipate material exposure from tariffs affecting its products [21] - Management highlighted the importance of continued demand for products in Latin America and the U.S. pediatric and adult markets [19] Other Important Information - The company is on track for a PDUFA action date of August 18 for the UX-111 BLA under review by the FDA [7] - The company expects net cash used in operations to decrease in the remaining quarters of 2025, aiming for full-year GAAP profitability by 2027 [19] Q&A Session Summary Question: Discussion on setrusumab and fracture reduction - Management explained the concept of variation in fracture rates among patients and its impact on study outcomes, emphasizing confidence in achieving significant results [34][36] Question: Likelihood of success in the third interim read for OI - Management expressed optimism about meeting the p-value threshold based on the study's design and patient data [44][46] Question: Impact of recent FDA appointments on the rare disease space - Management indicated that while there are concerns, they remain confident in their clinical data supporting their programs [50][52] Question: Growth drivers for Crysvita in Latin America - Management noted that patient experiences and physician engagement are key factors driving growth in the region [116]

Exhibit 99.1 Contacts Ultragenyx Pharmaceutical Inc. Investors Joshua Higa ir@ultragenyx.com Ultragenyx Reports First Quarter 2025 Financial Results and Corporate Update First quarter total revenue of $139 million, Crysvita® revenue of $103 million and Dojolvi® revenue of $17 million Reaffirm 2025 Financial Guidance: Total revenue between $640 million to $670 million, Crysvita revenue of $460 million to $480 million, and Dojolvi revenue of $90 million to $100 million UX111, an investigational treatment for ...

Pipeline & Approvals - Ultragenyx expects a PDUFA date of August 18, 2025, for UX111 in Sanfilippo syndrome (MPS IIIA) and a potential commercial launch in the second half of 2025[67, 98] - The company anticipates BLA submission for DTX401 in Glycogen Storage Disease Type Ia (GSDIa) in mid-2025, with a potential launch in 2026[78, 80, 98] - Phase 3 enrollment for GTX-102 in Angelman Syndrome (AS) is expected to be completed in the second half of 2025, with a Phase 2/3 Aurora study initiation planned for 2025[46, 49, 61, 98] - Ultragenyx plans to complete Stage 1, Cohort 4 enrollment for UX701 in Wilson Disease (WD) in the second half of 2025[88, 90, 98] - Phase 3 data readout for UX143 in Osteogenesis Imperfecta (OI) is expected in 2025[21, 28, 32] Financial Performance & Projections - Ultragenyx projects total revenue between $640 million and $670 million in 2025, representing a 14-20% annual revenue growth[94, 95] - Crysvita revenue is projected to be between $460 million and $480 million in 2025, a 12-17% increase[95] - Dojolvi revenue is expected to be between $90 million and $100 million in 2025, a 2-13% increase[95] - The company aims to achieve full-year GAAP profitability in 2027, driven by revenue growth, expense management, and monetization of Priority Review Vouchers (PRVs)[2, 96, 97, 99] - Ultragenyx reported $563 million in cash, cash equivalents, and marketable debt securities as of March 31, 2025[97]

Core Insights - Ultragenyx Pharmaceutical Inc. reported total revenue of $139 million for Q1 2025, reflecting a 28% increase compared to Q1 2024, with Crysvita revenue at $103 million, a 25% increase year-over-year [4][8] - The company reaffirmed its 2025 financial guidance, projecting total revenue between $640 million to $670 million, with Crysvita revenue expected to be between $460 million to $480 million, and Dojolvi revenue between $90 million to $100 million [10][12] - The investigational treatment UX111 for Sanfilippo syndrome is on track for a Biologics License Application (BLA) action date set for August 18, 2025 [14] Financial Performance - Total revenues for Q1 2025 were $139 million, up from $108.8 million in Q1 2024, with significant contributions from Crysvita and Dojolvi [3][4] - Crysvita's product sales in Latin America and Türkiye reached $55 million, marking a 52% increase compared to the previous year [4][5] - Operating expenses totaled $282 million in Q1 2025, with research and development costs at $165.8 million [6][7] Net Loss and Cash Position - The net loss for Q1 2025 was $151 million, or $1.57 per share, an improvement from a net loss of $171 million, or $2.03 per share, in Q1 2024 [8][9] - As of March 31, 2025, the company had cash, cash equivalents, and marketable securities totaling $563 million, down from $745 million at the end of 2024 [9][29] Clinical Developments - The company is progressing with multiple clinical trials, including UX143 for osteogenesis imperfecta and GTX-102 for Angelman syndrome, with key interim analyses expected in mid-2025 [10][11] - The Phase 3 study for DTX401 is anticipated to submit a BLA in mid-2025, following positive results from the GlucoGene study [15][16] Strategic Focus - Ultragenyx aims to manage expenses while prioritizing investments in upcoming commercial launches and advancing multiple Phase 3 programs, which is expected to reduce net cash used in operations in 2025 compared to 2024 [10][12]

Core Insights - The Medical sector is experiencing a robust first-quarter earnings season, with several drugmakers reporting results, and large caps like J&J, Merck, and Amgen exceeding earnings and sales estimates [1][2] - Overall, first-quarter earnings for the Medical sector are projected to rise by 40%, with revenues expected to increase by 8.3% [3] Earnings Performance - As of April 30, 45% of Medical sector companies, representing approximately 57.9% of the sector's market capitalization, have reported earnings, with 66.7% beating both earnings and revenue estimates [2] - Year-over-year earnings growth for the sector is reported at 60.5%, while revenues have increased by 7.8% [2] Company Highlights - **Novo Nordisk**: Expected to report earnings of 92 cents per share and revenues of $11.33 billion, with strong sales anticipated from diabetes and obesity care products [6][7] - **Pacira BioSciences**: Projected earnings of 57 cents per share and revenues of $174.96 million, driven by sales of its pain-management product Exparel [8][9] - **Ultragenyx Pharmaceuticals**: Expected to report a loss of $1.54 per share and revenues of $141.99 million, with growth driven by its lead drug Crysvita [10][11] - **Acadia Pharmaceuticals**: Anticipated earnings of 6 cents per share and revenues of $241.74 million, primarily from sales of Nuplazid for Parkinson's disease psychosis [12][13] - **Denali Therapeutics**: Expected loss of 71 cents per share and revenues of $8.3 million, with updates on pipeline programs anticipated during the earnings report [17][18] Earnings Surprise Potential - The Earnings ESP methodology indicates that stocks with a positive Earnings ESP and a Zacks Rank of 1, 2, or 3 have a high chance of delivering earnings surprises, with a success rate of up to 70% [4][5]

NOVATO, Calif., April 30, 2025 (GLOBE NEWSWIRE) -- Ultragenyx Pharmaceutical Inc. (NASDAQ: RARE), a biopharmaceutical company focused on the development and commercialization of novel products for serious rare and ultra-rare genetic diseases, today announced that it will host a conference call at 5:00 p.m. ET on Tuesday, May 6, 2025, to discuss its financial results and corporate update for the quarter ending March 31, 2025. The live and replayed webcast of the call will be available through the company’s w ...

Group 1 - Ultragenyx Pharmaceutical is transitioning from a development-stage biotech to a commercial entity with a promising pipeline for significant expansion in the rare disease sector [1] - The company is positioned in a high-growth industry, focusing on disruptive technologies and innovative solutions [1] Group 2 - The article emphasizes the importance of fundamental analysis and future trend prediction in evaluating investment opportunities within the biotech sector [1]

Company Overview - Ultragenyx shares increased by 9.2% to $33.91, following a significant trading volume, contrasting with a 19% decline over the past four weeks [1] - The company is expected to report a quarterly loss of $1.58 per share, reflecting a year-over-year increase of 22.2%, with revenues projected at $142.49 million, a 30.9% rise from the previous year [2] - The consensus EPS estimate for Ultragenyx has remained stable over the last 30 days, indicating that stock price movements may not sustain without earnings estimate revisions [3] Industry Insights - Ultragenyx operates within the Zacks Medical - Biomedical and Genetics industry, where Entrada Therapeutics also resides, having seen a 9.5% increase in its stock price to $8.27, despite a 29.1% decline over the past month [3] - Entrada Therapeutics has experienced a -2.9% change in its EPS estimate over the past month, now projected at -$0.78, which is a significant decline of 214.7% compared to the previous year [4] - Both Ultragenyx and Entrada Therapeutics currently hold a Zacks Rank of 3 (Hold), indicating a neutral outlook for investors [3][4]