---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-25-084500"
form_type: "8-K"
ticker: "ONCO"
cik: "0001782107"
company_name: "Onconetix, Inc."
filed_at: "2025-09-04T23:59:59+00:00"
generated_at: "2026-05-17T08:20:26.931454+00:00"
event_type: "debt"
sentiment: "negative"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Onconetix issues $117.6K in promissory notes; amends Veru note to $5.2M, extended to Sept 19

## Summary
- Issued $58,823.53 principal note to Keystone Capital and $58,823.53 to KCP Fund I, each with $8,823.53 OID, netting $100K total.
- Both notes due upon earlier of ELOC proceeds or May 28, 2026, subordinate to existing Veru debt.
- Amended Veru note: principal increased by $100K to $5.2M; maturity extended to September 19, 2025.
- Veru waived April Veru Note maturity to September 19, 2025 under August 28 waiver agreement.
- Notes require mandatory prepayment from subsequent equity offerings (excluding senior lender and Series C preferred proceeds).

## SEC filing metadata
- accession: 0001213900-25-084500
- form_type: 8-K
- ticker: ONCO
- cik: 0001782107
- company_name: Onconetix, Inc.
- filed_at: 2025-09-04T23:59:59+00:00
- event_type: debt
- sentiment: negative
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 1.01, 2.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1782107/000121390025084500/0001213900-25-084500-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1782107/000121390025084500/ea0255958-8k_onconetix.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-25-084500
- JSON: https://secwatch.observer/filing/0001213900-25-084500.json
- Plain text: https://secwatch.observer/filing/0001213900-25-084500.txt

## Key facts
- Debt Financings
  Onconetix, Inc. incurred loan of principal amount of $58,823.53 with KCP Fund I, LLC maturing upon the earlier of (i) the Company's receipt of sufficient proceeds from its equity line of credit with Keystone ... and (ii) May 28, 2026.
  - Instrument: loan
  - Principal: principal amount of $58,823.53
  - Counterparty: KCP Fund I, LLC
  - Maturity: upon the earlier of (i) the Company's receipt of sufficient proceeds from its equity line of credit with Keystone ... and (ii) May 28, 2026
  - Event: incurrence
  source text: (ii) KCP Fund I, LLC, an affiliate of Keystone (the “ KCP Note ”, and together with the Keystone Note, the “ Notes ”) each with original issue discount of $8,823.53 and a principal amount of $58,823.53
  evidence_url: https://www.sec.gov/Archives/edgar/data/1782107/000121390025084500/0001213900-25-084500-index.htm
- Debt Financings
  Onconetix, Inc. incurred loan of principal amount of $58,823.53 with Keystone Capital Partners, LLC maturing upon the earlier of (i) the Company's receipt of sufficient proceeds from its equity line of credit with Keystone ... and (ii) May 28, 2026.
  - Instrument: loan
  - Principal: principal amount of $58,823.53
  - Counterparty: Keystone Capital Partners, LLC
  - Maturity: upon the earlier of (i) the Company's receipt of sufficient proceeds from its equity line of credit with Keystone ... and (ii) May 28, 2026
  - Event: incurrence
  source text: I, LLC, an affiliate of Keystone (the “ KCP Note ”, and together with the Keystone Note, the “ Notes ”) each with original issue discount of $8,823.53 and a principal amount of $58,823.53. The Notes are due and payable upon the earlier of (i) the Company’s receipt of sufficient proceeds from its equity line of credit with Keystone (the “ ELOC ”) and (ii) May 28,
  evidence_url: https://www.sec.gov/Archives/edgar/data/1782107/000121390025084500/0001213900-25-084500-index.htm
- Debt Financings
  Onconetix, Inc. amended loan of aggregate principal amount of $5.2 million with Veru Inc. maturing September 19, 2025.
  - Instrument: loan
  - Principal: aggregate principal amount of $5.2 million
  - Counterparty: Veru Inc.
  - Maturity: September 19, 2025
  - Event: amendment
  source text: On August 28, 2025, Veru and the Company agreed to amend and restate the September Veru Note (as amended and restated, the “ Second A&R September Veru Note ”). Pursuant to the Second A&R September Veru Note, the principal amount owed to Veru was increased by $100,000 to an aggregate principal amount of $5.2 million, and the maturity date was amended to September 19, 2025.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1782107/000121390025084500/0001213900-25-084500-index.htm

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