---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-25-053367"
form_type: "8-K"
ticker: "ONCO"
cik: "0001782107"
company_name: "Onconetix, Inc."
filed_at: "2025-06-11T23:59:59+00:00"
generated_at: "2026-05-19T13:41:03.482359+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Onconetix announces 1-for-85 reverse stock split effective June 13 to regain Nasdaq compliance

## Summary
- Reverse split 1-for-85 effective June 13, 2025; outstanding shares reduced from ~44.4M to ~521,863.
- Split intended to regain Nasdaq minimum $1.00 bid price compliance; no change to authorized shares.
- New CUSIP 68237Q203; trading symbol ONCO unchanged.
- Promissory note of $147,058.82 issued to Keystone Capital Partners with $22,059 OID, subordinated to Veru debt, due by March 5, 2026.

## SEC filing metadata
- accession: 0001213900-25-053367
- form_type: 8-K
- ticker: ONCO
- cik: 0001782107
- company_name: Onconetix, Inc.
- filed_at: 2025-06-11T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 1.01, 2.03, 3.03, 5.03, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1782107/000121390025053367/0001213900-25-053367-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1782107/000121390025053367/ea0245387-8k_onconetix.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-25-053367
- JSON: https://secwatch.observer/filing/0001213900-25-053367.json
- Plain text: https://secwatch.observer/filing/0001213900-25-053367.txt

## Key facts
- Debt Financings
  Onconetix, Inc. incurred loan of aggregate principal amount of $147,058.82 with Keystone Capital Partners, LLC at does not initially bear interest maturing March 5, 2026.
  - Instrument: loan
  - Principal: aggregate principal amount of $147,058.82
  - Counterparty: Keystone Capital Partners, LLC
  - Rate: does not initially bear interest
  - Maturity: March 5, 2026
  - Event: incurrence
  source text: issued a promissory note to Keystone Capital Partners, LLC with original issue discount of $22,058.82, in an aggregate principal amount of $147,058.82. The note is due and payable upon the earlier of (i) the Company’s receipt of sufficient proceeds from the ELOC and (ii) March 5, 2026
  evidence_url: https://www.sec.gov/Archives/edgar/data/1782107/000121390025053367/0001213900-25-053367-index.htm
- Governance Changes
  Onconetix, Inc.: Amendment to Amended and Restated Certificate of Incorporation to effect a 1-for-85 reverse stock split (effective 2025-06-13).
  - Change: charter amendment
  - Effective: 2025-06-13
  source text: On June 11, 2025, the Company expects to file the Amendment to its Charter with the Secretary of State of the State of Delaware to effect a reverse stock split of its Common Stock at a ratio of 1-to-85 (the "Reverse Stock Split"). The Reverse Stock Split will become effective in accordance with the terms of the Amendment at 12:01 a.m. Eastern Time on June 13, 2025 (the "Effective Time").
  evidence_url: https://www.sec.gov/Archives/edgar/data/1782107/000121390025053367/0001213900-25-053367-index.htm

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