---
schema_version: "secwatch.filing_event.v1"
accession: "0001641172-25-003400"
form_type: "8-K"
ticker: "ACFN"
cik: "0000880984"
company_name: "ACORN ENERGY, INC."
filed_at: "2025-04-09T23:59:59+00:00"
generated_at: "2026-05-23T18:43:14.595305+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.45
calibrated_materiality_score: 0.45
confidence: "high"
source: SEC EDGAR
---

# Acorn Energy replaces Marcum with CBIZ CPAs as independent auditor

## Summary
- Marcum LLP resigned as auditor on April 7, 2025; Acorn engaged CBIZ CPAs P.C. same day.
- No adverse opinions or disagreements with Marcum for fiscal years 2023 and 2024.
- Previously reported material weaknesses in internal controls (ITGC, segregation of duties, deferred tax analysis) cited.
- Marcum provided a letter (Exhibit 16) regarding the resignation, filed with the SEC.

## SEC filing metadata
- accession: 0001641172-25-003400
- form_type: 8-K
- ticker: ACFN
- cik: 0000880984
- company_name: ACORN ENERGY, INC.
- filed_at: 2025-04-09T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.45
- calibrated_materiality_score: 0.45
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/880984/000164117225003400/0001641172-25-003400-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/880984/000164117225003400/form8-k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001641172-25-003400
- JSON: https://secwatch.observer/filing/0001641172-25-003400.json
- Plain text: https://secwatch.observer/filing/0001641172-25-003400.txt

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