2025-05-14 NUCOR CORP Cybersecurity Incident

Page last updated on May 26, 2025

NUCOR CORP initially disclosed a cybersecurity incident in an SEC 8-K filing on 2025-05-14 06:05:37 EDT.

Company Summary

Nucor Corporation steel production company that provides a diverse range of steel and steel products.

Incident Details

Material: Unknown
Is Breach: Unknown
Records Compromised: Unknown
Data Types Impacted: No Data Types Tracked (yet)

Compromised Date:
Detected Date: 2025-05-14
Disclosure Date: 2025-05-14
Contained Date:
Recovered Date:

Attack Goal: Unknown

Costs: No Costs Tracked (yet)

Filings

8-K filed on 2025-05-14

NUCOR CORP filed an 8-K at 2025-05-14 06:05:37 EDT
Accession Number: 0001193125-25-119311

Item 1.05 Material Cybersecurity Incidents.

Nucor Corporation (the “Company”) recently identified a cybersecurity incident involving unauthorized third party access to certain information technology systems used by the Company. Upon detecting the incident, the Company began promptly taking steps to contain and respond to the incident, including activating its incident response plan, proactively taking potentially affected systems offline and implementing other containment, remediation, or recovery measures. The Company is actively investigating the incident with the assistance of leading external cybersecurity experts and has notified federal law enforcement authorities. As of the date of this filing and in an abundance of caution, the Company temporarily and proactively halted certain production operations at various locations. However, the Company is currently in the process of restarting the affected operations.

As the investigation of the incident is ongoing, the Company will continue to monitor the timing and materiality of the incident.

Company Information