NasdaqGM - Nasdaq Real Time Price • USD Sionna Therapeutics, Inc. (SION) Follow Compare 20.05 +0.19 +(0.96%) As of 2:47:56 PM EST. Market Open. All News Press Releases SEC Filings All SEC Filings Corporate Changes & Voting Matters Periodic Financial Reports Proxy Statements Tender Offer/Acquisition Reports Offering Registrations Sionna Therapeutics Announces Closing of $219.2 million Upsized Initial Public Offering, Including Full Exercise of Underwriters’ Option to Purchase Additional Shares BOSTON, Feb. 10, 2025 (GLOBE NEWSWIRE) -- Sionna Therapeutics, Inc. (Nasdaq: SION), a clinical-stage biopharmaceutical company on a mission to revolutionize the current treatment paradigm for cystic fibrosis (CF) by developing novel medicines that normalize the function of the cystic fibrosis transmembrane conductance regulator (CFTR) protein, today announced the closing of its upsized initial public offering of 12,176,467 shares of its common stock at a public offering price of $18.00 per share Sionna Therapeutics Prices Upsized Initial Public Offering BOSTON, Feb. 06, 2025 (GLOBE NEWSWIRE) -- Sionna Therapeutics Inc. (Nasdaq: SION), a clinical-stage biopharmaceutical company on a mission to revolutionize the current treatment paradigm for cystic fibrosis (CF) by developing novel medicines that normalize the function of the cystic fibrosis transmembrane conductance regulator (CFTR) protein, today announced the pricing of its upsized initial public offering of 10,588,233 shares of its common stock at a public offering price of $18.00 per share. Vertex challenger Sionna prices $191M IPO The biotech is evaluating several cystic fibrosis medicines that could either work alongside Vertex’s top-selling Trikafta or be used in new, multi-drug combinations. Performance Overview Trailing total returns as of 2/13/2025, which may include dividends or other distributions. Benchmark is S&P 500 Return SION S&P 500 YTD -19.80% +3.86% 1-Year -19.80% +23.33% 3-Year -19.80% +38.24%