SIONNA THERAPEUTICS (SION) 8-K Summary

Filing Date: November 5, 2025

Sionna Therapeutics filed a Form 8-K primarily to disclose financial results and business highlights for the quarter ended September 30, 2025.

• Key Action: Furnished press release (Exhibit 99.1) containing Q3 2025 operational and financial data.
• Investor Note: The substantive financial details are contained within Exhibit 99.1, not the 8-K body itself.
• The company is classified as an Emerging Growth Company.
• Securities are traded on The Nasdaq Global Market under ticker SION.

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