---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-25-034216"
form_type: "8-K"
ticker: "CECO"
cik: "0000003197"
company_name: "CECO ENVIRONMENTAL CORP"
filed_at: "2025-03-06T23:59:59+00:00"
generated_at: "2026-05-25T07:56:54.938380+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# CECO Environmental dismisses BDO, appoints Deloitte as auditor for FY2025

## Summary
- BDO dismissed as independent auditor effective Feb 28, 2025; no adverse opinions or disagreements on financials for FY2023/2024.
- Deloitte engaged March 5, 2025 for fiscal year ending Dec 31, 2025; no prior consultations on accounting or audit matters.
- Prior material weaknesses in internal controls over revenue recognition and balance sheet reconciliations (reported in 2023 10-K) were remediated by Q2 2024 and Q1 2024 respectively.
- BDO provided a letter agreeing with the company's characterization of the dismissal and related events.

## SEC filing metadata
- accession: 0000950170-25-034216
- form_type: 8-K
- ticker: CECO
- cik: 0000003197
- company_name: CECO ENVIRONMENTAL CORP
- filed_at: 2025-03-06T23:59:59+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/3197/000095017025034216/0000950170-25-034216-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/3197/000095017025034216/ceco-20250228.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-25-034216
- JSON: https://secwatch.observer/filing/0000950170-25-034216.json
- Plain text: https://secwatch.observer/filing/0000950170-25-034216.txt

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