---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-24-037602"
form_type: "8-K"
ticker: "HNNA"
cik: "0001145255"
company_name: "HENNESSY ADVISORS INC"
filed_at: "2024-12-16T23:59:59+00:00"
generated_at: "2026-05-29T02:46:28.564034+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Hennessy Advisors replaces Marcum with CBIZ as auditor after Marcum declines reelection

## Summary
- Marcum LLP notified Hennessy on Dec 10, 2024 it would not stand for reelection as auditor.
- Marcum resigned Dec 11, 2024; Audit Committee approved CBIZ CPAs P.C. as successor for FY2025.
- No disagreements or reportable events occurred during fiscal years 2024 and 2023 or through Dec 11, 2024.
- CBIZ acquired Marcum's attest business on Nov 1, 2024, prompting the transition.
- Marcum's letter agreeing with the company's statements is filed as Exhibit 16.1.

## SEC filing metadata
- accession: 0001437749-24-037602
- form_type: 8-K
- ticker: HNNA
- cik: 0001145255
- company_name: HENNESSY ADVISORS INC
- filed_at: 2024-12-16T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1145255/000143774924037602/0001437749-24-037602-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1145255/000143774924037602/hnna20241216_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-24-037602
- JSON: https://secwatch.observer/filing/0001437749-24-037602.json
- Plain text: https://secwatch.observer/filing/0001437749-24-037602.txt

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