Why Soleno Therapeutics stock is down today: investor alerts revive Vykat XR scrutiny
New York, Jan 9, 2026, 13:28 (EST) — Regular session Soleno Therapeutics shares slid on Friday, extending a choppy stretch for the rare-disease drugmaker. The stock was down 5.6% at $42.95, after touching a low of $42.73, while the SPDR S&P Biotech ETF was up about 1.1%. The move matters now because Soleno’s story still hinges on a young commercial launch and a single product, Vykat XR. Any shift in sentiment around safety, pricing, or patients staying on therapy can hit the stock hard, fast. A Zacks Equity Research industry outlook on Thursday highlighted Soleno alongside Nektar Therapeutics, Rigel Pharmaceuticals,