IBSRELA generates $40.6 million in net product sales revenue; Company expects full year 2024 IBSRELA net sales revenue to be between $145 and $150 million XPHOZAH generates $51.5 million in net product sales revenue Company ends Q3 with approximately $190 million in cash, cash equivalents and investments Conference call scheduled for 4:30 PM Eastern Time WALTHAM, Mass., Oct. 31, 2024 (GLOBE NEWSWIRE) — Ardelyx, Inc. (Nasdaq: ARDX), a biopharmaceutical company founded with a mission to discover, develop and commercialize innovative, first-in-class medicines that meet significant unmet medical needs, today reported financial results for the third quarter ended September 30, 2024 and provided a business update. “The continued strong performance of Ardelyx reported during the third quarter demonstrates our ability to execute and deliver on our goals, to focus on serving the patient and to build towards the future,” said Mike Raab, president and chief executive officer of Ardelyx. “IBSRELA continues to deliver consistent quarter-over-quarter growth driven by strong fundamentals: an attractive safety and efficacy profile, expanding awareness among healthcare prescribers, a streamlined path to access and, importantly, positive experiences among treated patients. In addition, the unmet need among dialysis patients for another option to help achieve and maintain target phosphorus levels is clear, demonstrated by the continued strong demand and growth for XPHOZAH. We remain committed to ensuring that this well-tolerated, effective and differentiated medicine remains available to patients, despite CMS’ planned change in Medicare Part D reimbursement in early-January 2025, and we are confident that we have made decisions that will best support our efforts to protect patient access to XPHOZAH. Finally, we continue to thoughtfully strengthen our balance sheet, providing us with capital to invest as we look to expand our business.” IBSRELA® (tenapanor) records $40.6 million in net product sales revenue in Q3 2024U.S. net product sales revenue for IBSRELA during the third quarter of 2024 was $40.6 million, showing approximately 15% quarter-over-quarter growth compared to the second quarter of 2024, and significant growth compared to the $22.3 million in net product sales revenue the company reported during the third quarter of 2023. The strong Q3 2024 performance reflects the continued growing demand for IBSRELA, demonstrated by increases in new and refill prescriptions as well as growth in new and repeat writing healthcare providers. Ardelyx currently expects full-year 2024 U.S. net product sales revenue for IBSRELA to be between $145.0 and $150.0 million. XPHOZAH® (tenapanor) launch progresses, records $51.5 million net product sales revenue during Q3 2024A strong XPHOZAH launch continues, with the company reporting $51.5 million in net product sales revenue during the third quarter of 2024, approximately 39% quarter-over-quarter growth compared to the second quarter of 2024. The Q3 2024 performance reinforces the significant unmet need among dialysis patients with hyperphosphatemia. Other Corporate Developments Today, the company announced that it amended its February 2022 loan agreement with investment affiliates managed by SLR Capital Partners (SLR). The company drew $50 million at SOFR plus 4.02% in October 2024, added the opportunity to draw an additional $50 million at the same interest rate, and extended the interest-only period for existing and new tranches funded under the instrument to July 1, 2028.The company had a significant presence at the 2024 Annual Scientific Meeting for the American College of Gastroenterology (ACG 2024) in Philadelphia from October 25-30, 2024. The company presented two posters featuring data from the 2024 IBS in America supplemental survey, sponsored by the company in collaboration with Health Union, which was conducted to better understand the symptoms and impact of IBS-C on the overall health and quality of life among patients.The company had a significant presence at the 2024 Annual American Society of Nephrology Kidney Week in San Diego from October 23-27, 2024. The company presented two posters covering additional data for XPHOZAH.In October, the company announced the publication of a review article exploring the patient burden and therapeutic landscape of IBS-C in the U.S. in Clinical and Experimental Gastroenterology. The article is available online and can be found here.In August, the company announced the appointment of experienced biopharma executive, Eric Foster, as Chief Commercial Officer.In July, the company announced the publication of two plain language summaries from XPHOZAH clinical trials in Current Medical Research and Opinion. Third Quarter 2024 Financial Results Cash Position: As of September 30, 2024, the company had total cash, cash equivalents and short-term investments of $190.4 million, as compared to total cash, cash equivalents and short-term investments of $184.3 million as of December 31, 2023. In October, the company drew $49.7 million in net proceeds under its term loan with SLR Investment Corp.Revenue: Total revenue for the quarter ended September 30, 2024 was $98.2 million, compared to $56.4 million in total revenue during the quarter ended September 30, 2023, driven by increases in net product sales. IBSRELA U.S. net product sales revenue was $40.6 million, compared to $22.3 million during the same period of 2023.XPHOZAH U.S. net product sales revenue was $51.5 million, with no comparable revenue during the same period of 2023.Product supply revenue was $5.3 million, compared to $2.1 million during the same period of 2023.Licensing revenue was $20 thousand, compared to $32 million during the same period of 2023 related to $30 million milestone and license agreement amendment payments from Kyowa Kirin following the approval of tenapanor for hyperphosphatemia in Japan, as well as a $2.0 million milestone payment from Fosun Pharma following the acceptance of the NDA for tenapanor for hyperphosphatemia in China.Non-cash royalty revenue related to the sale of future royalties was $0.8 million, with no comparable revenue during the same period of 2023. R&D Expenses: Research and development expenses were $15.3 million for the quarter ended September 30, 2024, compared to $8.6 million for the quarter ended September 30, 2023, primarily related to increased medical engagement with the scientific communities in the areas of gastroenterology and nephrology and pediatric clinical trials.SG&A Expenses: Selling, general and administrative expenses were $65.0 million for the quarter ended September 30, 2024, an increase of $32.3 million compared to $32.7 million for the quarter ended September 30, 2023. The increase in selling, general and administrative expenses was related to increased costs associated with the ongoing commercialization of IBSRELA and XPHOZAH, primarily the expansion of the IBSRELA field-based team which was completed during the third quarter of 2024.Net Loss: Net loss for the quarter ended September 30, 2024 was $0.8 million, or $(0.00) per share, compared to net income of $6.6 million, or $0.03 per share, for the quarter ended September 30, 2023. The $0.8 million net loss for the third quarter of 2024 included share-based compensation expense of $9.1 million and non-cash interest expense related to the sale of future royalties of $1.9 million. Conference Call DetailsThe company will host a conference call today, October 31, 2024, at 4:30 PM ET to discuss today’s announcement. To participate in the conference call, please dial (877) 346-6112 (domestic) or (848) 280-6350 (international) and ask to be joined into the Ardelyx call. A webcast of the call can also be accessed by visiting the Investor page of the company’s website, https://ir.ardelyx.com/ and will be available on the website for 30 days following the call. IMPORTANT SAFETY INFORMATION (IBSRELA) WARNING: RISK OF SERIOUS DEHYDRATION IN PEDIATRIC PATIENTS IBSRELA is contraindicated in patients less than 6 years of age; in nonclinical studies in young juvenile rats administration of tenapanor caused deaths presumed to be due to dehydration. Avoid use of IBSRELA in patients 6 years to less than 12 years of age. The safety and effectiveness of IBSRELA have not been established in patients less than 18 years of age. CONTRAINDICATIONS IBSRELA is contraindicated in patients less than 6 years of age due to the risk of serious dehydration.IBSRELA is contraindicated in patients with known or suspected mechanical gastrointestinal obstruction. WARNINGS AND PRECAUTIONSRisk of Serious Dehydration in Pediatric Patients IBSRELA is contraindicated in patients below 6 years of age. The safety and effectiveness of IBSRELA in patients less than 18 years of age have not been established. In young juvenile rats (less than 1 week old; approximate human age equivalent of less than 2 years of age), decreased body weight and deaths occurred, presumed to be due to dehydration, following oral administration of tenapanor. There are no data available in older juvenile rats (human age equivalent 2 years to less than 12 years).Avoid the use of IBSRELA in patients 6 years to less than 12 years of age. Although there are no data in older juvenile rats, given the deaths in younger rats and the lack of clinical safety and efficacy data in pediatric patients, avoid the use of IBSRELA in patients 6 years to less than 12 years of age. Diarrhea Diarrhea was the most common adverse reaction in two randomized, double-blind, placebo-controlled trials of IBS-C. Severe diarrhea was reported in 2.5% of IBSRELA-treated patients. If severe diarrhea occurs, suspend dosing and rehydrate patient. MOST COMMON ADVERSE REACTIONS The most common adverse reactions in IBSRELA-treated patients (incidence ≥2% and greater than placebo) were: diarrhea (16% vs 4% placebo), abdominal distension (3% vs <1%), flatulence (3% vs 1%) and dizziness (2% vs <1%). INDICATION IBSRELA (tenapanor) is indicated for the treatment of Irritable Bowel Syndrome with Constipation (IBS-C) in adults. Please see full Prescribing Information, including Boxed Warning, for additional risk information. IMPORTANT SAFETY INFORMATION (XPHOZAH) CONTRAINDICATIONSXPHOZAH is contraindicated in: Pediatric patients under 6 years of agePatients with known or suspected mechanical gastrointestinal obstruction WARNINGS AND PRECAUTIONSDiarrhea Patients may experience severe diarrhea. Treatment with XPHOZAH should be discontinued in patients who develop severe diarrhea. MOST COMMON ADVERSE REACTIONS Diarrhea, which occurred in 43-53% of patients, was the only adverse reaction reported in at least 5% of XPHOZAH-treated patients with CKD on dialysis across trials. The majority of diarrhea events in the XPHOZAH-treated patients were reported to be mild-to-moderate in severity and resolved over time, or with dose reduction. Diarrhea was typically reported soon after initiation but could occur at any time during treatment with XPHOZAH. Severe diarrhea was reported in 5% of XPHOZAH-treated patients in these trials. INDICATION XPHOZAH (tenapanor), 30 mg BID, is indicated to reduce serum phosphorus in adults with chronic kidney disease (CKD) on dialysis as add-on therapy in patients who have an inadequate response to phosphate binders or who are intolerant of any dose of phosphate binder therapy. For additional safety information, please see full Prescribing Information. About ArdelyxArdelyx was founded with a mission to discover, develop and commercialize innovative, first-in-class medicines that meet significant unmet medical needs. Ardelyx has two commercial products approved in the United States, IBSRELA® (tenapanor) and XPHOZAH® (tenapanor). Ardelyx has agreements for the development and commercialization of tenapanor outside of the U.S. Kyowa Kirin commercializes PHOZEVEL® (tenapanor) for hyperphosphatemia in Japan. A New Drug Application for tenapanor for hyperphosphatemia has been submitted in China with Fosun Pharma. Knight Therapeutics commercializes IBSRELA in Canada. For more information, please visit https://ardelyx.com/ and connect with us on X (formerly known as Twitter), LinkedIn and Facebook. Forward Looking StatementsTo the extent that statements contained in this press release are not descriptions of historical facts regarding Ardelyx, they are forward-looking statements reflecting the current beliefs and expectations of management made pursuant to the safe harbor of the Private Securities Reform Act of 1995, including Ardelyx’s current expectation regarding opportunities for continued IBSRELA and XPHOZAH adoption; projected U.S. net product sales revenue for IBSRELA for full year 2024; the company’s ability to execute and deliver on its goals and expand its business; and the company’s ability to protect patient access to XPHOZAH. Such forward-looking statements involve substantial risks and uncertainties that could cause Ardelyx’s 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, uncertainties associated with the development of, regulatory process for, and commercialization of drugs in the U.S. and internationally. Ardelyx 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 Ardelyx’s business in general, please refer to Ardelyx’s Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on October 31, 2024, and its future current and periodic reports to be filed with the Securities and Exchange Commission. Investor and Media Contacts: Caitlin Lowieclowie@ardelyx.com Ardelyx, Inc.Condensed Balance Sheets(In thousands) September 30, 2024 December 31, 2023 (Unaudited) (1) Assets Cash and cash equivalents$47,429 $21,470 Investments 142,973 162,829 Accounts receivable 53,195 22,031 Prepaid commercial manufacturing 16,663 18,925 Prepaid commercial manufacturing, non-current — 4,235 Inventory, current 11,378 12,448 Inventory, non-current 73,780 37,039 Property and equipment, net 1,028 1,009 Right-of-use assets 3,625 5,589 Prepaid and other assets 17,792 12,004 Total assets$367,863 $297,579 Liabilities and stockholders’ equity Accounts payable$15,824 $11,138 Accrued compensation and benefits 11,541 12,597 Current portion of operating lease liability 2,567 4,435 Deferred revenue 20,042 15,826 Accrued expenses and other liabilities 33,295 15,041 Operating lease liability, net of current portion 1,218 1,725 Long-term debt 100,707 49,822 Deferred royalty obligation related to the sale of future royalties 24,372 20,179 Stockholders’ equity 158,297 166,816 Total liabilities and stockholders’ equity$367,863 $297,579 (1) Derived from the audited financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023. Ardelyx, Inc.Condensed Statements of Operations(Unaudited)(In thousands, except share and per share amounts) Three Months Ended September 30, Nine Months Ended September 30, 2024 2023 2024 2023 Revenues: Product sales, net: IBSRELA$40,638 $22,285 $104,444 $51,949 XPHOZAH 51,452 — 103,749 — Total product sales, net 92,090 22,285 208,193 51,949 Product supply revenue 5,322 2,092 7,461 5,354 Licensing revenue 20 32,014 56 32,790 Non-cash royalty revenue related to the sale of future royalties 809 — 1,776 — Total revenues 98,241 56,391 217,486 90,093 Cost of goods sold: Cost of product sales 1,715 644 4,133 1,508 Other cost of revenue 14,013 7,048 28,159 11,210 Total cost of goods sold 15,728 7,692 32,292 12,718 Operating expenses: Research and development 15,310 8,637 38,651 26,012 Selling, general and administrative 64,970 32,664 182,618 86,653 Total operating expenses 80,280 41,301 221,269 112,665 Income (loss) from operations 2,233 7,398 (36,075) (35,290)Interest expense (3,357) (1,107) (9,039) (3,210)Non-cash interest expense related to the sale of future royalties (1,924) (922) (5,202) (2,859)Other income, net 2,282 1,460 6,766 4,308 Income (loss) before provision for income taxes (766) 6,829 (43,550) (37,051)Provision for income taxes 43 200 231 214 Net income (loss)$(809) $6,629 $(43,781) $(37,265)Net income (loss) per share of common stock – basic and diluted$(0.00) $0.03 $(0.19) $(0.17)Shares used in computing net income (loss) per share – basic 235,911,399 222,782,229 234,516,305 214,976,555 Shares used in computing net (loss) income per share – diluted 235,911,399 227,894,335 234,516,305 214,976,555