Cleveland-Cliffs Inc.'s FY2023 Form 10-K Item 1C cybersecurity disclosure describes its information security program, governance (Audit Committee oversight, CIO-led team), risk management practices, and use of third-party security providers. The filing states that in 2023 the company did not identify any material cybersecurity events that have materially affected or are reasonably likely to materially affect its business. No specific breach incident is disclosed.