Nucor updates on May 2025 cyber incident; operations restored, no material impact

NUCOR CORP

Threat actor illegally accessed IT systems; limited data exfiltrated; access temporarily restricted to some applications.
Production at various facilities proactively halted as precaution; operations since restored.
Company believes incident not material to business, financial condition, or results; no material impact expected.
Remediation included incident response activation, system shutdown, backup restoration, external experts, and law enforcement notification.

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