---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-25-095847"
form_type: "8-K"
ticker: "ONCO"
cik: "0001782107"
company_name: "Onconetix, Inc."
filed_at: "2025-10-03T23:59:59+00:00"
generated_at: "2026-05-17T04:48:24.977130+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Onconetix secures $6.25M through PIPE of Series E convertible preferred and warrants

## Summary
- Sold 7,813 shares of Series E convertible preferred stock at $1,000 stated value per share.
- Series E convertible at $3.8576 per share; warrants to purchase 2,025,223 common shares included.
- Total gross proceeds of approximately $6.25 million from institutional investors.
- Ownership limitation set at 4.99%; registration rights agreement granted for underlying shares.

## SEC filing metadata
- accession: 0001213900-25-095847
- form_type: 8-K
- ticker: ONCO
- cik: 0001782107
- company_name: Onconetix, Inc.
- filed_at: 2025-10-03T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 1.01, 3.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1782107/000121390025095847/0001213900-25-095847-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1782107/000121390025095847/ea0259860-8k_onconetix.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-25-095847
- JSON: https://secwatch.observer/filing/0001213900-25-095847.json
- Plain text: https://secwatch.observer/filing/0001213900-25-095847.txt

## Key facts
- Equity Issuances
  Onconetix, Inc. issued warrants to purchase 2,025,223 shares of Common Stock of warrant to institutional investors for aggregate purchase price of approximately $6.25 million.
  - Security: warrant
  - Shares: warrants to purchase 2,025,223 shares of Common Stock
  - Purchaser: institutional investors
  - Consideration: aggregate purchase price of approximately $6.25 million
  source text: On October 1, 2025, Onconetix, Inc., a Delaware corporation (the “ Company ”), entered into, and sold to institutional investor(s) (collectively, the “ PIPE Investors ”), pursuant to a securities purchase agreement (the “ Securities Purchase Agreement ”) an aggregate of 7,813 shares of Series E convertible preferred stock, par value $0.00001 per share (“ Series E Preferred Stock ”), which are convertible into common stock of the Company, $0.00001 par value per share (the “ Common Stock ”) and warrants to purchase 2,025,223 shares of Common Stock (the “ Warrants ” and, together with the Series E Preferred Stock, the “ PIPE Securities ”), for an aggregate purchase price of approximately $6.25 million.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1782107/000121390025095847/0001213900-25-095847-index.htm
- Equity Issuances
  Onconetix, Inc. issued 7,813 shares of Series E convertible preferred stock of preferred stock to institutional investors for aggregate purchase price of approximately $6.25 million.
  - Security: preferred stock
  - Shares: 7,813 shares of Series E convertible preferred stock
  - Purchaser: institutional investors
  - Consideration: aggregate purchase price of approximately $6.25 million
  source text: On October 1, 2025, Onconetix, Inc., a Delaware corporation (the “ Company ”), entered into, and sold to institutional investor(s) (collectively, the “ PIPE Investors ”), pursuant to a securities purchase agreement (the “ Securities Purchase Agreement ”) an aggregate of 7,813 shares of Series E convertible preferred stock, par value $0.00001 per share (“ Series E Preferred Stock ”), which are convertible into common stock of the Company, $0.00001 par value per share (the “ Common Stock ”) and warrants to purchase 2,025,223 shares of Common Stock (the “ Warrants ” and, together with the Series E Preferred Stock, the “ PIPE Securities ”), for an aggregate purchase price of approximately $6.25 million.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1782107/000121390025095847/0001213900-25-095847-index.htm

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