Nucor Corp Faces Investigation Over Data Breach

Nucor Corp faces investigation over a data breach involving unauthorized access to sensitive personal information. The breach was detected on May 13, 2025, but the company had not notified affected individuals by June 20, 2025. Nucor has launched an investigation with cybersecurity experts and disclosed the breach to the SEC. The breach may impact investor confidence and prompt other companies to reassess their cybersecurity strategies.

Nucor Corporation (NYSE: NUE), a leading producer of steel and steel products, is currently under investigation for a data breach involving unauthorized access to sensitive personal information. The breach was detected on May 13, 2025, but the company had not yet begun notifying individuals whose data may have been impacted by the incident when it disclosed the breach to the U.S. Securities and Exchange Commission (SEC) on June 20, 2025 [1].

The breach was discovered by Nucor following an unauthorized third-party access to its IT systems between May 3 and May 13, 2025. The company has not publicly disclosed what specific information was stolen, but it has stated that personal information was among the data accessed [1]. This delay in notification has raised concerns about the company's handling of the breach and its potential impact on investor confidence.

The investigation into the data breach is being conducted by Schubert Jonckheer & Kolbe LLP, a law firm based in San Francisco. The firm represents shareholders, employees, and consumers in class actions against corporate defendants and shareholders in derivative actions against their officers and directors [2].

The data breach at Nucor comes amidst a wave of cyber incidents affecting various industries in June 2025, including major retailers, healthcare providers, and government agencies. These incidents underscore the growing threat of cyber attacks and the importance of robust cybersecurity practices [3].

Investors and financial professionals should closely monitor Nucor's response to the data breach and its potential impact on the company's operations and financial performance. The company's cybersecurity measures and practices will be under scrutiny, and any further disclosures or developments in the investigation will be important to follow.

References:

[1] Schubert Jonckheer & Kolbe LLP. "Privacy Alert: Nucor Corporation Under Investigation for Data Breach of Records." PRNewswire. July 8, 2025. https://www.prnewswire.com/news-releases/privacy-alert-nucor-corporation-under-investigation-for-data-breach-of-records-302499663.html

[2] Schubert Jonckheer & Kolbe LLP. "About Schubert Jonckheer & Kolbe LLP." PRNewswire. July 8, 2025. https://www.prnewswire.com/news-releases/privacy-alert-nucor-corporation-under-investigation-for-data-breach-of-records-302499663.html

[3] CM-Alliance. "Major Cyber Attacks, Ransomware Attacks and Data Breaches of June 2025." CM-Alliance. June 2025. https://www.cm-alliance.com/cybersecurity-blog/major-cyber-attacks-ransomware-attacks-and-data-breaches-of-june-2025