Financial Data and Key Metrics Changes - In Q3 2025, the company generated U.S. net product sales of $113.2 million, with FILSPARI contributing approximately $90.9 million, representing an increase of more than 155% year-over-year [22][23] - Net income for Q3 2025 was $25.7 million, or $0.29 per basic share, compared to a net loss of $54.8 million, or $0.70 per basic share for the same period in 2024 [25] - As of September 30, 2025, cash, cash equivalents, and marketable securities totaled approximately $254.5 million [26] Business Line Data and Key Metrics Changes - FILSPARI's net sales reached approximately $91 million in Q3 2025, driven by consistent demand and engagement among prescribers [16] - The company saw 731 new patient start forms during the quarter, with September recording the highest daily patient start form rate since launch [16][18] - Thiola and Thiola EC contributed $22.3 million in U.S. net product sales [23] Market Data and Key Metrics Changes - The FDA approved a modification to the FILSPARI REMS program, which simplifies care for physicians and patients, reinforcing FILSPARI's long-term safety profile [5][14] - The KDIGO guidelines included FILSPARI as a first-line option for patients at risk of IgA nephropathy progression, validating its role as foundational treatment [9][10] Company Strategy and Development Direction - The company is preparing for a potential FDA approval in FSGS, aiming to launch FILSPARI as the first approved medication for this condition [7][19] - The focus on expanding FILSPARI's global footprint and addressing urgent needs in rare kidney diseases is central to the company's mission [6][28] - The company plans to advance the manufacturing scale-up of pegtibatinase to support the pivotal HARMONY study restart in 2026 [4][8] Management's Comments on Operating Environment and Future Outlook - Management expressed confidence in sustaining FILSPARI's growth in IgA nephropathy and executing a successful launch in FSGS if approved [27][28] - The company is well-positioned financially, with no near-term need for additional capital, allowing it to focus on core objectives [26][27] Other Important Information - The company repaid its remaining 2025 convertible notes, strengthening its financial foundation [22] - The recent acquisition of Renalys by Chugai Pharmaceutical is expected to create value and validate FILSPARI's potential globally [22][23] Q&A Session Summary Question: Impact of REMS adjustment and competitive dynamics - Management noted consistent demand since full approval last year, with the REMS modification positively received by the nephrology community, leading to a continuation of new prescribers [31][32][35] Question: Typical baseline proteinuria level at start of prescribing - The company indicated that about 65% of the patient population has proteinuria levels below 1.5 grams per gram, with a trend towards lower levels at initiation [37][39] Question: Communication leading up to FSGS PDUFA date - Management stated that they will enter a quiet period as they approach the PDUFA date and will provide updates on January 13 [47] Question: Awareness of REMS and KDIGO changes among practitioners - The company is actively communicating the REMS modification to physicians, while key opinion leaders are already familiar with the KDIGO guidelines [49][51] Question: Off-label use in FSGS setting - Limited prescribing and use in FSGS have been observed, but the company does not promote this [38] Question: Future R&D expenses and timelines for sparsentan development - Management expects additional investments for pegtibatinase as clinical operations ramp up, with no change in timelines for sparsentan development in Japan and other regions [78]