---
schema_version: "secwatch.filing_event.v1"
accession: "0002036042-25-000018"
form_type: "8-K"
ticker: "SION"
cik: "0002036042"
company_name: "Sionna Therapeutics, Inc."
filed_at: "2025-06-13T23:59:59+00:00"
generated_at: "2026-05-19T09:25:19.354143+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.15
confidence: "high"
source: SEC EDGAR
---

# Sionna Therapeutics annual meeting elects three Class I directors, ratifies auditor

## Summary
- Shareholders elected Joshua Resnick, Bruce Booth, and Lucian Iancovici as Class I directors, each with over 42 million votes for.
- Ratification of Deloitte & Touche as independent auditor for FY2025 passed with 43,189,421 votes for, none against.
- Record date April 15, 2025; 44,124,394 shares outstanding; broker non-votes of 496,255 on director elections.

## SEC filing metadata
- accession: 0002036042-25-000018
- form_type: 8-K
- ticker: SION
- cik: 0002036042
- company_name: Sionna Therapeutics, Inc.
- filed_at: 2025-06-13T23:59:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.15
- confidence: high
- sec_items: 5.07
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2036042/000203604225000018/0002036042-25-000018-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2036042/000203604225000018/sion-20250612.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0002036042-25-000018
- JSON: https://secwatch.observer/filing/0002036042-25-000018.json
- Plain text: https://secwatch.observer/filing/0002036042-25-000018.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.