---
schema_version: "secwatch.filing_event.v1"
accession: "0001171843-25-005800"
form_type: "8-K"
ticker: "EDSA"
cik: "0001540159"
company_name: "Edesa Biotech, Inc."
filed_at: "2025-09-09T23:59:59+00:00"
generated_at: "2026-05-17T07:17:49.644806+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Edesa Biotech files prospectus supplement for up to $4.0M ATM offering through H.C. Wainwright

## Summary
- ATM offering for up to $4,006,544 of common shares through H.C. Wainwright.
- Previously sold $837,134 under existing ATM agreement from October 2024.
- New shelf registration statement (S-3, File No. 333-288966) declared effective September 9, 2025.
- Legal opinion from Fasken Martineau DuMoulin LLP on share validity included as exhibit.

## SEC filing metadata
- accession: 0001171843-25-005800
- form_type: 8-K
- ticker: EDSA
- cik: 0001540159
- company_name: Edesa Biotech, Inc.
- filed_at: 2025-09-09T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1540159/000117184325005800/0001171843-25-005800-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1540159/000117184325005800/f8k_090925.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001171843-25-005800
- JSON: https://secwatch.observer/filing/0001171843-25-005800.json
- Plain text: https://secwatch.observer/filing/0001171843-25-005800.txt

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