---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-306934"
form_type: "8-K"
ticker: "CMBMF"
cik: "0001738177"
company_name: "Cambium Networks Corp"
filed_at: "2025-12-03T23:59:59+00:00"
generated_at: "2026-05-16T15:17:44.639718+00:00"
event_type: "regulatory"
sentiment: "negative"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Cambium Networks dismisses Grant Thornton, hires BDO amid restatements and material weaknesses

## Summary
- Dismissed Grant Thornton as auditor on Nov 26, 2025; Grant Thornton had not issued any audit report.
- Engaged BDO USA as successor to audit restated 2023 financials and 2024/2025 periods.
- Company disclosed multiple material weaknesses including inventory obsolescence, deferred tax assets, IT controls, and complex accounting issues.
- Previously issued financial statements for 2022-2023 annual and six interim periods require restatement due to revenue recognition errors.
- Non-reliance periods from fiscal 2022 through Q3 2024; restated statements not yet filed.

## SEC filing metadata
- accession: 0001193125-25-306934
- form_type: 8-K
- ticker: CMBMF
- cik: 0001738177
- company_name: Cambium Networks Corp
- filed_at: 2025-12-03T23:59:59+00:00
- event_type: regulatory
- sentiment: negative
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1738177/000119312525306934/0001193125-25-306934-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1738177/000119312525306934/cmbm-20251126.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-306934
- JSON: https://secwatch.observer/filing/0001193125-25-306934.json
- Plain text: https://secwatch.observer/filing/0001193125-25-306934.txt

## Source-grounded claims
- claim_id: 0524b362f6e3851e8f9a8965ae9a4911537de48f
  claim: Cambium Networks Corp dismissed Grant Thornton LLP as its auditor.
  evidence_excerpt: On November 26, 2025, the Audit Committee (the “Committee”) of the Board of Directors of Cambium Networks Corporation (the “Company”) dismissed Grant Thornton LLP (“Grant Thornton”) as the Company’s independent registered public accounting firm.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1738177/000119312525306934/0001193125-25-306934-index.htm
- claim_id: 09d343502b9ccbc370603afda7ee489e123d06cb
  claim: Cambium Networks Corp engaged BDO USA, PC as its auditor.
  evidence_excerpt: On November 26, 2025, the Committee approved the engagement of BDO, as the Company's independent registered public accounting firm, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1738177/000119312525306934/0001193125-25-306934-index.htm
- claim_id: e810f88b1f9332b08299a71536b88ae3eec0186e
  claim: Cambium Networks Corp reported that prior financial statements should not be relied upon.
  evidence_excerpt: the Company determined that the Company’s previously issued financial statements and related disclosures for (i) the fiscal years ended December 31, 2022, and December 31, 2023, included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2023 (the “Audited Financial Statements”), and (ii) the interim periods (the “Unaudited Financial Statements”) included in the Company’s Quarterly Reports on Form 10-Q for the periods ended March 31, 2023, June 30, 2023, September 30, 2023, March 31, 2024, June 30, 2024, and September 30, 2024 (collectively the “Non-Reliance Periods”), should be restated and should no longer be relied upon
  evidence_url: https://www.sec.gov/Archives/edgar/data/1738177/000119312525306934/0001193125-25-306934-index.htm

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