---
schema_version: "secwatch.filing_event.v1"
accession: "0000883902-24-000015"
form_type: "8-K/A"
ticker: null
cik: "0000883902"
company_name: "Cornerstone Building Brands, Inc."
filed_at: "2024-02-23T23:59:59+00:00"
generated_at: "2026-06-05T17:55:50.906974+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Cornerstone Building Brands dismisses Grant Thornton, appoints Deloitte as auditor

## Summary
- Grant Thornton completed audit of FY2023 financials; dismissal effective February 23, 2024.
- No adverse opinions, disagreements, or reportable events occurred in FY2022 or FY2023.
- Deloitte engaged as independent auditor for FY2024, effective January 15, 2024.
- No prior consultations with Deloitte on accounting matters before engagement.

## SEC filing metadata
- accession: 0000883902-24-000015
- form_type: 8-K/A
- cik: 0000883902
- company_name: Cornerstone Building Brands, Inc.
- filed_at: 2024-02-23T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/883902/000088390224000015/0000883902-24-000015-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/883902/000088390224000015/cnr-20240115.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000883902-24-000015
- JSON: https://secwatch.observer/filing/0000883902-24-000015.json
- Plain text: https://secwatch.observer/filing/0000883902-24-000015.txt

## Key facts
- Auditor Changes
  Cornerstone Building Brands, Inc. engaged Deloitte & Touche LLP as its auditor.
  - Action: engagement
  - Auditor: Deloitte & Touche LLP
  source text: on January 15, 2024, the Audit Committee selected Deloitte as the Company’s independent registered public accounting firm
  evidence_url: https://www.sec.gov/Archives/edgar/data/883902/000088390224000015/0000883902-24-000015-index.htm
- Auditor Changes
  Cornerstone Building Brands, Inc. dismissed Grant Thornton LLP as its auditor.
  - Action: dismissal
  - Auditor: Grant Thornton LLP
  source text: of the Company’s consolidated financial statements as of and for the fiscal year ended December 31, 2023 by Grant Thornton LLP (“Grant Thornton”) and the issuance of Grant Thornton’s reports thereon.
  evidence_url: https://www.sec.gov/Archives/edgar/data/883902/000088390224000015/0000883902-24-000015-index.htm

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