---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-23-055199"
form_type: "8-K"
ticker: "ONCO"
cik: "0001782107"
company_name: "Onconetix, Inc."
filed_at: "2023-07-06T23:59:59+00:00"
generated_at: "2026-06-13T12:02:23.212495+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Blue Water Biotech auditor resigns; EisnerAmper appointed as new independent auditor

## Summary
- Mayer Hoffman McCann (MHM) resigned as independent auditor effective June 29, 2023.
- No disagreements with MHM on accounting principles or audit scope during fiscal years 2021-2022 or interim period.
- Previously disclosed material weakness in internal controls (lack of staff for segregation of duties) noted.
- Audit committee appointed EisnerAmper LLP as new independent auditor for FY 2023 on July 6, 2023.

## SEC filing metadata
- accession: 0001213900-23-055199
- form_type: 8-K
- ticker: ONCO
- cik: 0001782107
- company_name: Onconetix, Inc.
- filed_at: 2023-07-06T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1782107/000121390023055199/0001213900-23-055199-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1782107/000121390023055199/ea181441-8k_bluewater.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-23-055199
- JSON: https://secwatch.observer/filing/0001213900-23-055199.json
- Plain text: https://secwatch.observer/filing/0001213900-23-055199.txt

## Key facts
- Auditor Changes
  Onconetix, Inc. engaged EisnerAmper LLP as its auditor.
  - Action: engagement
  - Auditor: EisnerAmper LLP
  source text: On July 6, 2023, the Audit Committee appointed EisnerAmper LLP (“EA”) to serve as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2023 and related interim periods.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1782107/000121390023055199/0001213900-23-055199-index.htm
- Auditor Changes
  Mayer Hoffman McCann P.C. resigned as auditor of Onconetix, Inc..
  - Action: resignation
  - Auditor: Mayer Hoffman McCann P.C.
  source text: On June 29, 2023, Mayer Hoffman McCann P.C. (“MHM”), Blue Water Biotech, Inc.’s (the “Company”) independent registered public accounting firm, informed the Company that it resigned, effective June 29, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1782107/000121390023055199/0001213900-23-055199-index.htm

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