TVTX Stock Soars as FDA Waives Advisory Committee for Filspari sNDA

Core Insights - Travere Therapeutics (TVTX) received an encouraging update from the FDA regarding its supplemental new drug application (sNDA) for Filspari (sparsentan) in treating focal segmental glomerulosclerosis (FSGS), with a final decision expected on January 13, 2026, leading to a 26.2% increase in TVTX's shares [1][6] Company Overview - FSGS is a rare kidney disorder affecting over 40,000 patients in the U.S. and a similar number in the EU, characterized by kidney scarring and proteinuria, which can lead to kidney failure [2] - Filspari, if approved, would be the first treatment specifically indicated for FSGS, designed to address podocyte injury, a key factor in the disease's progression [3] Clinical Evidence - The sNDA for Filspari is supported by robust clinical data from the phase III DUPLEX and phase II DUET studies, showing significant reductions in proteinuria compared to Sanofi's Avapro [4][9] - The DUPLEX study demonstrated a 67% to 77% lower risk of kidney failure for patients achieving remission, although it did not meet the primary efficacy endpoint for eGFR slope [8][9] Market Performance - Year-to-date, TVTX stock has increased by 56.8%, significantly outperforming the industry average growth of 4.9% [5] Regulatory Developments - Filspari was previously granted full approval for IgA nephropathy (IgAN), making it the only non-immunosuppressive medication in that space [10] - The FDA recently streamlined the Risk Evaluation and Mitigation Strategies (REMS) for Filspari, reducing monitoring burdens and potentially accelerating physician adoption [13]