---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-25-091966"
form_type: "8-K"
ticker: "ONCO"
cik: "0001782107"
company_name: "Onconetix, Inc."
filed_at: "2025-09-26T23:59:59+00:00"
generated_at: "2026-05-17T05:35:23.302616+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.9
calibrated_materiality_score: 0.9
confidence: "high"
source: SEC EDGAR
---

# Onconetix raises $12.9M via Series D convertible preferred stock and warrants in PIPE financing

## Summary
- Company sold 16,099 shares of Series D convertible preferred stock and warrants to purchase 4,362,827 shares of common stock to eleven institutional investors.
- Aggregate purchase price of approximately $12.9 million, with about $9.3 million in cash and the balance offsetting amounts owed to Veru Inc. and others.
- Series D preferred stock has a stated value of $1,000 per share, convertible into common stock at an initial conversion price of $3.6896 per share.
- Company entered into a registration rights agreement with the PIPE investors for resale of underlying common shares.

## SEC filing metadata
- accession: 0001213900-25-091966
- form_type: 8-K
- ticker: ONCO
- cik: 0001782107
- company_name: Onconetix, Inc.
- filed_at: 2025-09-26T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.9
- calibrated_materiality_score: 0.9
- confidence: high
- sec_items: 1.01, 1.02, 3.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1782107/000121390025091966/0001213900-25-091966-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1782107/000121390025091966/ea0258830-8k_onconetix.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-25-091966
- JSON: https://secwatch.observer/filing/0001213900-25-091966.json
- Plain text: https://secwatch.observer/filing/0001213900-25-091966.txt

## Key facts
- Equity Issuances
  Onconetix, Inc. issued warrants to purchase 4,362,827 shares of Common Stock of warrant to eleven institutional investors for included in aggregate purchase price of approximately $12.9 million.
  - Security: warrant
  - Shares: warrants to purchase 4,362,827 shares of Common Stock
  - Purchaser: eleven institutional investors
  - Consideration: included in aggregate purchase price of approximately $12.9 million
  source text: On September 22, 2025, Onconetix, Inc., a Delaware corporation (the “ Company ”), entered into, and sold to eleven institutional investor(s) (collectively, the “ PIPE Investors ”), pursuant to a securities purchase agreement (the “ Securities Purchase Agreement ”) an aggregate of 16,099 shares of Series D convertible preferred stock, par value $0.00001 per share (“ Series D Preferred Stock ”), which are convertible into common stock of the Company, $0.00001 par value per share (the “ Common Stock ”), which includes an issuance of 500 shares of Series D Preferred Stock to a certain investor as consideration for the PIPE Investors’ irrevocable commitment to purchase shares of the Series D Preferred Stock, and warrants to purchase 4,362,827 shares of Common Stock (the “ Warrants ” and, together with the Series D Preferred Stock, the “ PIPE Securities ”), for an aggregate purchase price of approximately $12.9 million.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1782107/000121390025091966/0001213900-25-091966-index.htm
- Equity Issuances
  Onconetix, Inc. issued 16,099 shares of Series D convertible preferred stock of preferred stock to eleven institutional investors for aggregate purchase price of approximately $12.9 million of which approximately $9.3 million was paid in cash and the balance was used to offset certain amounts.
  - Security: preferred stock
  - Shares: 16,099 shares of Series D convertible preferred stock
  - Purchaser: eleven institutional investors
  - Consideration: aggregate purchase price of approximately $12.9 million of which approximately $9.3 million was paid in cash and the balance was used to offset certain amounts
  source text: On September 22, 2025, Onconetix, Inc., a Delaware corporation (the “ Company ”), entered into, and sold to eleven institutional investor(s) (collectively, the “ PIPE Investors ”), pursuant to a securities purchase agreement (the “ Securities Purchase Agreement ”) an aggregate of 16,099 shares of Series D convertible preferred stock, par value $0.00001 per share (“ Series D Preferred Stock ”), which are convertible into common stock of the Company, $0.00001 par value per share (the “ Common Stock ”), which includes an issuance of 500 shares of Series D Preferred Stock to a certain investor as consideration for the PIPE Investors’ irrevocable commitment to purchase shares of the Series D Preferred Stock, and warrants to purchase 4,362,827 shares of Common Stock (the “ Warrants ” and, together with the Series D Preferred Stock, the “ PIPE Securities ”), for an aggregate purchase price of approximately $12.9 million.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1782107/000121390025091966/0001213900-25-091966-index.htm

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