Steelmaker Nucor restores operations, confirms limited data breach

Nucor, the leading steel manufacturer in the U.S., said it has restored operations following a hack in May that compromised a limited amount of information.

The company — which produces roughly a quarter of America’s raw steel — believes it has evicted the hackers from its systems and does not expect the incident to have a material impact on its financial performance or operations, it said in a filing with the Securities and Exchange Commission. 

Nucor said the incident temporarily limited its ability to access certain functions and some of its facilities. The manufacturer worked with external forensic experts to investigate and recover from the attack. 

During the response process, the company temporarily took its systems offline and restored certain data from backup files, according to the filing. The company has worked with outside experts to reinforce its IT systems to prevent a future attack. 

The Charlotte, N.C.-based company said last week that it expected to report earnings of between $2.55 and $2.65 per share in the second fiscal quarter, which ends July 5. The company expects earnings to increase across all three of its operating segments, with the biggest rise in the steel-mills business due to higher average selling prices across its sheet and plate mills. 

Nucor did not disclose any specific information about the financial impact of the May cyberattack. The company expects to report earnings July 28 and hold a conference call the following day