---
schema_version: "secwatch.filing_event.v1"
accession: "0001802457-23-000024"
form_type: "8-K"
ticker: "ORGN"
cik: "0001802457"
company_name: "Origin Materials, Inc."
filed_at: "2023-03-09T23:59:59+00:00"
generated_at: "2026-06-18T07:29:20.138320+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Origin Materials dismisses Grant Thornton, appoints Deloitte as auditor for FY2023

## Summary
- Audit Committee dismissed Grant Thornton as independent auditor on March 6, 2023; no disagreements in FY2022 or FY2021.
- Deloitte & Touche appointed as new independent registered public accounting firm for fiscal year ending December 31, 2023.
- Previously reported material weakness in internal control over financial reporting for 2021 has been remediated.
- Grant Thornton furnished a letter agreeing with the Company's statements, filed as Exhibit 16.1.

## SEC filing metadata
- accession: 0001802457-23-000024
- form_type: 8-K
- ticker: ORGN
- cik: 0001802457
- company_name: Origin Materials, Inc.
- filed_at: 2023-03-09T23:59:59+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/1802457/000180245723000024/0001802457-23-000024-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1802457/000180245723000024/orgn-20230306.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001802457-23-000024
- JSON: https://secwatch.observer/filing/0001802457-23-000024.json
- Plain text: https://secwatch.observer/filing/0001802457-23-000024.txt

## Key facts
- Auditor Changes
  Origin Materials, Inc. engaged Deloitte & Touche LLP as its auditor.
  - Action: engagement
  - Auditor: Deloitte & Touche LLP
  source text: On March 6, 2023, the Audit Committee approved the appointment of Deloitte & Touche LLP ("Deloitte") as the Company's independent registered public accounting firm for the fiscal year ending December 31, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1802457/000180245723000024/0001802457-23-000024-index.htm
- Auditor Changes
  Origin Materials, Inc. dismissed Grant Thornton LLP as its auditor.
  - Action: dismissal
  - Auditor: Grant Thornton LLP
  - Successor: Deloitte & Touche LLP
  source text: On March 6, 2023, the Audit Committee approved the dismissal of the Grant Thornton LLP ("GT") as the Company's independent registered public accounting firm.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1802457/000180245723000024/0001802457-23-000024-index.htm

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