---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-25-043941"
form_type: "8-K"
ticker: "ACU"
cik: "0000002098"
company_name: "ACME UNITED CORP"
filed_at: "2025-03-24T23:59:59+00:00"
generated_at: "2026-05-24T07:05:08.234518+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "high"
source: SEC EDGAR
---

# Acme United replaces auditor Marcum with CBIZ after Marcum's resignation due to acquisition

## Summary
- Marcum LLP resigned as independent auditor on March 24, 2025, following acquisition of its attest business by CBIZ.
- No disagreements or reportable events existed with Marcum for fiscal years 2024 and 2023 or through March 24, 2025.
- Audit Committee engaged CBIZ CPAs P.C. as new independent registered public accounting firm on March 24, 2025.
- Company did not consult CBIZ on accounting matters prior to appointment.

## SEC filing metadata
- accession: 0000950170-25-043941
- form_type: 8-K
- ticker: ACU
- cik: 0000002098
- company_name: ACME UNITED CORP
- filed_at: 2025-03-24T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2098/000095017025043941/0000950170-25-043941-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2098/000095017025043941/acu-20250324.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-25-043941
- JSON: https://secwatch.observer/filing/0000950170-25-043941.json
- Plain text: https://secwatch.observer/filing/0000950170-25-043941.txt

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