Triheptanoin

Preliminary 2025 total revenue of $672 million to $674 million, exceeding top end of guidance Preliminary cash and investments of approximately $735 million as of December 31, 2025 Anticipated 2026 catalysts include two potential approvals and pivotal Phase 3 data from the GTX-102 Phase 3 Aspire study for Angelman syndrome NOVATO, Calif., Jan. 12, 2026 (GLOBE NEWSWIRE) -- Ultragenyx Pharmaceutical Inc. (NASDAQ: RARE), a biopharmaceutical company focused on the development and commercialization of novel therapies for serious rare and ultra-rare genetic diseases, today reported preliminary unaudited 2025 revenue results, cash and investments at year end 2025, and provided a corporate update. “In 2025, we delivered another year of significant revenue growth, with preliminary revenue exceeding the top end of guidance," said Emil Kakkis, chief executive officer and president of Ultragenyx. "The year ahead will be transformational for our company and the rare disease communities we serve, with two potential gene therapy approvals of first-ever treatments, and a pivotal data readout from our Phase 3 program in Angelman syndrome, setting the stage for our next phase of growth." Financial Update 2025 Preliminary Revenue (unaudited) Total revenue for 2025 is estimated to be $672 million to $674 million, which exceeds the top end of the guidance range, and represents approximately 20% growth versus 2024. Crysvita ® revenue for 2025 is estimated to be $480 million to $482 million, which exceeds the top end of the guidance range, and represents approximately 17% growth versus 2024. Dojolvi ® revenue for 2025 is estimated to be $95 million to $97 million, at the midpoint of the guidance range, and represents approximately 9% growth versus 2024. 2025 Ending Cash Position (unaudited) Cash and investments were approximately $735 million as of December 31, 2025. The 2025 revenues and cash position included in this release are preliminary and are therefore subject to adjustment. The preliminary revenue results are based on management’s initial analysis of operations for the year ended December 31, 2025. The Company expects to issue financial guidance for fiscal year 2026, including details on previously announced planned expense reductions, and full financial results for the fourth quarter and fiscal year 2025, in February 2026. 2026 Clinical and Regulatory Catalysts DTX401 (pariglasgene brecaparvovec) AAV gene therapy for glycogen storage disease type Ia (GSDIa): Biologics License Application (BLA) rolling submission completed in December 2025, with an anticipated PDUFA date in the third quarter of 2026. UX111 (rebisufligene etisparvovec) AAV gene therapy for Sanfilippo syndrome type A (MPS IIIA): Resubmission of the BLA is on track for early in 2026 and will be followed by an up to 6-month review per FDA regulations. GTX-102 (apazunersen) antisense oligonucleotide (ASO) for the treatment of Angelman syndrome (AS): Data from the fully enrolled, pivotal, Phase 3 Aspire study in patients with a genetically confirmed diagnosis of UBE3A deletion is expected in the second half of 2026. The Phase 2/3 Aurora study is also underway in other genotypes and ages, with first patient dosed in October 2025. UX701 (rivunatpagene miziparvovec) AAV gene therapy for Wilson disease: Enrollment is complete for the fourth cohort in the ongoing, dose-finding stage of the pivotal Cyprus2+ study. Data are expected in the first half of 2026. Data from the Phase 3 Orbit and Cosmic studies of UX143 (setrusumab) in osteogenesis imperfecta, including data on bone mineral density, vertebral fractures, and patient reported outcomes on pain and physical function, will be presented at the J.P. Morgan Healthcare Conference. The company presentation is scheduled for Monday, January 12, 2026 at 10:30 AM PT. The live and archived webcast of the presentation will be accessible from the company’s website at . About Ultragenyx Ultragenyx is a biopharmaceutical company committed to bringing novel therapies to patients for the treatment of serious rare and ultra-rare genetic diseases. The company has built a diverse portfolio of approved medicines and treatment candidates aimed at addressing diseases with high unmet medical need and clear biology, 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: . Forward-Looking Statements and Use of Digital Media Except for the historical information contained herein, the matters set forth in this press release, including statements related to Ultragenyx's expectations and projections regarding its future operating results and financial performance, anticipated cost or expense reductions, the timing, progress and plans for its clinical programs and clinical studies, future regulatory interactions, the components and timing of regulatory submissions and the timing of results from ongoing clinical studies are forward-looking statements within the meaning of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995. Such forward-looking statements involve substantial risks and uncertainties that could cause the company’s clinical development programs, commercial success of its products and product candidates, continued collaboration with third parties, future results, performance or achievements to differ significantly from those expressed or implied by the forward-looking statements. Such risks and uncertainties include, among others, the uncertainty of clinical drug development and unpredictability and lengthy process for obtaining regulatory approvals, risks related to serious or undesirable side effects of our product candidates, the company’s ability to achieve its projected development goals in its expected timeframes, risks related to reliance on third party partners to conduct certain activities on the company’s behalf, our limited experience in generating revenue from product sales, risks related to product liability lawsuits, our dependence on Kyowa Kirin for the commercialization of Crysvita in certain major markets, including the U.S. and Canada, and for our commercial supply of Crysvita in those markets, fluctuations in buying or distribution patterns from distributors and specialty pharmacies, , smaller than anticipated market opportunities for the company’s products and product candidates, manufacturing risks, our ability to successfully manage the expansion of our company, competition from other therapies or products, regulatory scrutiny of the company’s products and product candidates, the company’s limited experience as a company in operating its own manufacturing facility, market acceptance of our products, uncertainty related to insurance coverage and reimbursement, and other matters that could affect sufficiency of existing cash, cash equivalents and short-term investments to fund operations, the company’s future operating results and financial performance, the timing of clinical trial activities and reporting results from same, and the availability or commercial potential of Ultragenyx’s products and drug candidate. Ultragenyx undertakes no obligation to update or revise any forward-looking statements. For a further description of the risks and uncertainties that could cause actual results to differ from those expressed in these forward-looking statements, as well as risks relating to the business of Ultragenyx in general, see Ultragenyx's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission (SEC) on November 4, 2025, and its subsequent periodic reports filed with the SEC. In addition to its SEC filings, press releases and public conference calls, Ultragenyx uses its investor relations website and social media outlets to publish important information about the company, including information that may be deemed material to investors, and to comply with its disclosure obligations under Regulation FD. Financial and other information about Ultragenyx is routinely posted and is accessible on Ultragenyx’s Investor Relations website ( ) and LinkedIn website ( ). Contacts Ultragenyx Pharmaceutical Inc. Investors Joshua Higa ir@ultragenyx.com Media Jess Rowlands media@ultragenyx.com

Second quarter total revenue of $147 million, Crysvita® revenue of $114 million and Dojolvi® revenue of $19 million Increased 2024 expected total revenue guidance to $530 million to $550 million NOVATO, Calif., Aug. 01, 2024 (GLOBE NEWSWIRE) -- Ultragenyx Pharmaceutical Inc. (NASDAQ: RARE), a biopharmaceutical company focused on the development and commercialization of novel therapies for serious rare and ultrarare genetic diseases, today reported its financial results for the quarter ended June 30, 2024. “Our strong financial performance in the second quarter was driven by growing revenue across our commercial therapies from increasing global demand, leading us to raise our total revenue guidance for this year,” said Emil D. Kakkis, M.D., Ph.D., chief executive officer and president of Ultragenyx. “In the quarter, we also reported positive data from our Phase 1/2 study in Angelman syndrome, our Phase 2/3 study in osteogenesis imperfecta, and our Phase 3 study in GSDIa. We are in an excellent position to achieve additional key milestones in the second half of the year including initiating our Phase 3 Angelman study and filing for accelerated approval for UX111 in Sanfilippo syndrome type A.” Second Quarter 2024 Selected Financial Data Tables and Financial Results Revenues (dollars in thousands), (unaudited) Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Crysvita Product sales$40,449 $16,884 $76,690 $38,118 Revenue in Profit-Share Territory 67,045 61,314 107,447 111,220 Royalty revenue in European Territory 6,176 4,816 12,118 9,698 Total Crysvita Revenue 113,670 83,014 196,255 159,036 Dojolvi 19,355 16,491 35,717 30,794 Mepsevii 6,145 8,439 12,756 16,919 Evkeeza 7,856 365 11,131 577 Daiichi Sankyo — — — 1,479 Total revenues$147,026 $108,309 $255,859 $208,805 Total RevenuesUltragenyx reported $147 million in total revenue for the second quarter of 2024, which represents 36% growth compared to the same period in 2023. Second quarter 2024 Crysvita revenue was $114 million, which represents 37% growth compared to the same period in 2023. This includes product sales of $40 million from Latin America and Turkey, which represents 140% growth compared to the same period in 2023. Dojolvi revenue in the second quarter 2024 was $19 million, which represents 17% growth compared to the same period in 2023. Evkeeza revenue in the second quarter 2024 was $8 million, as demand continues to build in the company’s territories outside of the United States. Selected Financial Data (dollars in thousands, except per share amounts), (unaudited) Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Total revenues$147,026 $108,309 $255,859 $208,805 Operating expenses: Cost of sales 21,280 9,914 38,813 22,171 Research and development 161,503 164,949 339,990 330,647 Selling, general and administrative 80,604 81,403 158,764 158,049 Total operating expenses 263,387 256,266 537,567 510,867 Net loss$(131,598) $(159,828) $(302,282) $(323,800)Net loss per share, basic and diluted$(1.52) $(2.25) $(3.54) $(4.58) Operating Expenses Total operating expenses for the second quarter of 2024 were $263 million, including non-cash stock-based compensation of $39 million. In 2024, annual operating expenses are expected to be stable or to decrease as the company continues to manage its costs and focus its investment on advancing multiple Phase 3 programs and executing on commercial product launches. Net Loss For the second quarter of 2024, Ultragenyx reported net loss of $132 million, or $1.52 per share basic and diluted, compared with a net loss for the second quarter of 2023 of $160 million, or $2.25 per share basic and diluted. Net Cash Used in Operations and Cash BalanceFor the three months ended June 30, 2024, net cash used in operations was $77 million and for the six months ended June 30, 2024 it was $268 million. Cash, cash equivalents, and marketable debt securities were $874 million as of June 30, 2024, which includes $381 million of net proceeds from issuance of common stock and pre-funded warrants in connection with an underwritten public offering in June 2024. 2024 Full Year Financial Guidance Total revenue guidance increased to be in the range of $530 million to $550 million (previously $500 million to $530 million)Crysvita revenue expected to be towards the upper end of the range of $375 million to $400 million. This includes all regions where Ultragenyx will recognize revenue: product sales in Latin America and Turkey, royalties in Europe, which have been ongoing, and royalties in North America, which began in April 2023.Dojolvi revenue in the range of $75 million to $80 millionNet Cash Used in Operations less than $400 million Recent Updates and Clinical Milestones UX143 (setrusumab) monoclonal antibody for Osteogenesis Imperfecta (OI): 14-month data resulted in a large, sustained 67% reduction in annualized fracture rate and persistent median annualized fracture rate of 0.00 (p=0.0014)Positive 14-month results from the Phase 2 portion of the ongoing Phase 2/3 Orbit study demonstrated that, as of the May 24, 2024 data cut-off date, treatment with setrusumab continued to significantly reduce incidence of fractures in patients with OI. Treatment with setrusumab also resulted in ongoing and meaningful improvements in lumbar spine bone mineral density (BMD) at month 12 without evidence of plateau. The median annualized rate of radiologically confirmed fractures across all 24 patients in the 2 years prior to treatment was 0.72. Following a mean treatment duration period of 16 months, the median annualized fracture rate was reduced 67% to 0.00 (p=0.0014; n=24). The reduction in annualized fracture rates was associated with continued, clinically meaningful increases in BMD. Treatment with setrusumab at 12-month demonstrated a mean increase in lumbar spine BMD from baseline of 22% (p<0.0001, n=19) and an improvement of mean baseline lumbar spine BMD Z-score from -1.73 to -0.49 at 12 months. The improvements in BMD and Z-scores were significant and consistent across all OI sub-types studied. As of the data cut-off, there were no treatment-related serious adverse events observed in the study and there were no reported hypersensitivity reactions related to setrusumab. More detailed 14-month data will be presented at a future scientific meeting. GTX-102 antisense oligonucleotide for Angelman syndrome: Successful End-of-Phase 2 (EOP2) meeting with Food and Drug Administration (FDA); on track to initiate Phase 3 by the end of the yearIn July 2024, Ultragenyx completed a successful EOP2 meeting with the FDA supporting the pivotal Phase 3 Aspire study design, which will be a global, randomized, double-blind, sham-controlled trial and will include a 48-week primary efficacy analysis period enrolling approximately 120 patients with Angelman syndrome with a genetically confirmed diagnosis of full maternal UBE3A gene deletion. The primary endpoint will be improvement in cognition assessed by Bayley-4 cognitive raw score. The key secondary endpoint will be the Multi-domain Responder Index (MDRI) across all five domains of cognition, receptive communication, behavior, gross motor function, and sleep. Individual secondary endpoints were also discussed and aligned on with the FDA for the domains of communication, behavior, motor function and sleep. Additionally, the company plans to initiate Aurora, an open-label clinical study, to evaluate the safety and efficacy of GTX-102 for the treatment of patients with other Angelman syndrome genotypes and in other age groups. The company has also participated in a PRIME meeting with the European Medicines Agency, receiving acceptance of the overall Phase 3 study design, dosing and evaluations and has met with Japan’s Pharmaceuticals and Medical Devices Agency to inform and discuss its Phase 3 study design. The company expects the pivotal Phase 3 Aspire study to start by the end of 2024 and the Aurora study to start in 2025. UX701 AAV gene therapy for Wilson disease: Last patient in Cohort 3 dosed; expect interim Stage 1 data in the second half of 2024All patients in the three dose-escalation cohorts of Stage 1 have been dosed. During Stage 1, the safety and efficacy of UX701 will be evaluated and a dose will be selected for further evaluation in Stage 2, which is the pivotal, randomized, placebo-controlled stage of the study. Data from Stage 1 are expected in the second half of 2024, which will be followed by dose selection and initiation of Stage 2. UX111 AAV gene therapy for Sanfilippo syndrome type A (MPS IIIA): Agreement reached with FDA that cerebral spinal fluid (CSF) heparan sulfate (HS) can be used as a reasonable surrogate endpoint for accelerated approvalIn June 2024, Ultragenyx announced a successful meeting with the FDA during which the company reached agreement with the FDA that CSF HS is a reasonable surrogate endpoint that could support submission of a biologics license application, or BLA, seeking accelerated approval for UX111. As discussed with the FDA, the BLA filing will be based on the available data including from the ongoing pivotal Transpher A study evaluating the safety and efficacy of UX111 in children with MPS IIIA. The details of a BLA will be finalized with the FDA in a pre-BLA meeting that is expected to happen in the second half of 2024, with the intent to file the application late this year or early next year. DTX401 AAV gene therapy for Glycogen Storage Disease Type Ia (GSDIa): Positive top-line results from Phase 3 Study resulted in a statistically significant reduction in daily cornstarch intake at Week 48 (p<0.0001) with maintenance of glucose control In May 2024, Ultragenyx announced positive topline results from the Phase 3 GlucoGene study for the treatment of patients aged eight years and older. The study achieved its primary endpoint, demonstrating that treatment with DTX401 resulted in a statistically significant and clinically meaningful reduction in daily cornstarch intake compared with placebo at Week 48. The mean percent reduction was 41.3% in the DTX401 group (n=20) compared with 10.3% in the placebo group (n=24) at Week 48 (p<0.0001). Across patients treated with DTX401, the mean reduction in cornstarch continued to decline over the 48-week period. In the treatment group, all patients achieved a reduction in cornstarch, with 68% achieving ≥30% reduction and 37% achieving ≥50% reduction compared to the placebo group, which achieved the same reductions in 13% and 4% of patients, respectively, at Week 48. The study also successfully met key secondary endpoints of reduction in the number of cornstarch doses per day and maintenance of glucose control at Week 48. Full 48 Week data from the Phase 3 study will be presented at a scientific conference later this year. These results will be discussed with regulatory authorities to support a marketing application in 2025. DTX301 AAV gene therapy for Ornithine Transcarbamylase (OTC) Deficiency: Phase 3 study dosing patients; expect enrollment to be completed in the second half of 2024Ultragenyx is randomizing and dosing patients in the ongoing Phase 3 study. The pivotal, 64-week study will include approximately 50 patients, randomized 1:1 to DTX301 or placebo. The primary endpoints are response as measured by removal of ammonia-scavenger medications and protein-restricted diet and change in 24-hour ammonia levels. Enrollment is currently expected to be completed in the second half of 2024. Conference Call and Webcast Information Ultragenyx will host a conference call today, Thursday, August 1, 2024, at 2 p.m. PT/5 p.m. ET to discuss the second quarter 2024 financial results and provide a corporate update. The live and replayed webcast of the call will be available through the company’s website at https://ir.ultragenyx.com/events-presentations. The replay of the call will be available for one year. About Ultragenyx Ultragenyx is a biopharmaceutical company committed to bringing novel therapies to patients for the treatment of serious rare and ultrarare genetic diseases. The company has built a diverse portfolio of approved medicines and treatment candidates aimed at addressing diseases with high unmet medical need and clear biology, 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. Forward-Looking Statements and Use of Digital Media Except for the historical information contained herein, the matters set forth in this press release, including statements related to Ultragenyx's expectations and projections regarding its future operating results and financial performance, anticipated cost or expense reductions, the timing, progress and plans for its clinical programs and clinical studies, future regulatory interactions, and the components and timing of regulatory submissions are forward-looking statements within the meaning of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995. Such forward-looking statements involve substantial risks and uncertainties that could cause our clinical development programs, collaboration with third parties, future results, performance or achievements to differ significantly from those expressed or implied by the forward-looking statements. Such risks and uncertainties include, among others, the uncertainty of clinical drug development and unpredictability and lengthy process for obtaining regulatory approvals, risks related to serious or undesirable side effects of our product candidates, the company’s ability to achieve its projected development goals in its expected timeframes, risks related to reliance on third party partners to conduct certain activities on the company’s behalf, our limited experience in generating revenue from product sales, risks related to product liability lawsuits, our dependence on Kyowa Kirin for the commercial supply of Crysvita, fluctuations in buying or distribution patterns from distributors and specialty pharmacies, the transition back to Kyowa Kirin of our exclusive rights to promote Crysvita in the United States and Canada and unexpected costs, delays, difficulties or adverse impact to revenue related to such transition, smaller than anticipated market opportunities for the company’s products and product candidates, manufacturing risks, competition from other therapies or products, and other matters that could affect sufficiency of existing cash, cash equivalents and short-term investments to fund operations, the company’s future operating results and financial performance, the timing of clinical trial activities and reporting results from same, and the availability or commercial potential of Ultragenyx’s products and drug candidates. Ultragenyx undertakes no obligation to update or revise any forward-looking statements. For a further description of the risks and uncertainties that could cause actual results to differ from those expressed in these forward-looking statements, as well as risks relating to the business of Ultragenyx in general, see Ultragenyx's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission (SEC) on May 3, 2024, and its subsequent periodic reports filed with the SEC. In addition to its SEC filings, press releases and public conference calls, Ultragenyx uses its investor relations website and social media outlets to publish important information about the company, including information that may be deemed material to investors, and to comply with its disclosure obligations under Regulation FD. Financial and other information about Ultragenyx is routinely posted and is accessible on Ultragenyx’s Investor Relations website (https://ir.ultragenyx.com/) and LinkedIn website (https://www.linkedin.com/company/ultragenyx-pharmaceutical-inc-/mycompany/). Contacts Ultragenyx Pharmaceutical Inc.InvestorsJoshua Higair@ultragenyx.com Ultragenyx Pharmaceutical Inc.Selected Statement of Operations Financial Data(in thousands, except share and per share amounts)(unaudited) Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Statement of Operations Data: Revenues: Product sales$73,805 $42,179 $136,294 $86,408 Royalty revenue 73,221 46,331 119,565 51,213 Collaboration and license — 19,799 — 71,184 Total revenues 147,026 108,309 255,859 208,805 Operating expenses: Cost of sales 21,280 9,914 38,813 22,171 Research and development 161,503 164,949 339,990 330,647 Selling, general and administrative 80,604 81,403 158,764 158,049 Total operating expenses 263,387 256,266 537,567 510,867 Loss from operations (116,361) (147,957) (281,708) (302,062)Change in fair value of equity investments (3,991) 261 (245) (73)Non-cash interest expense on liabilities for sales of future royalties (15,960) (15,375) (31,807) (31,011)Other income, net 5,572 3,975 12,791 10,573 Loss before income taxes (130,740) (159,096) (300,969) (322,573)Provision for income taxes (858) (732) (1,313) (1,227)Net loss$(131,598) $(159,828) $(302,282) $(323,800)Net loss per share, basic and diluted$(1.52) $(2.25) $(3.54) $(4.58)Shares used in computing net loss per share, basic and diluted 86,580,516 70,897,991 85,433,443 70,639,015 Ultragenyx Pharmaceutical Inc.Selected Activity included in Operating Expenses(in thousands)(unaudited) Three Months Ended June 30, Six Months Ended June 30, 2024 2023 2024 2023 Non-cash stock-based compensation$39,363 $34,653 $76,297 $66,592 UX143 clinical milestone — $9,000 — $9,000 Ultragenyx Pharmaceutical Inc.Selected Balance Sheet Financial Data(in thousands)(unaudited) June 30, December 31, 2024 2023 Balance Sheet Data: Cash, cash equivalents, and marketable debt securities $874,490 $777,110 Working capital 691,774 451,747 Total assets 1,618,437 1,491,013 Total stockholders' equity 432,418 275,414