Nucor Corporation data breach
Nucor Corporation appears in 6 breach notices filed with New Hampshire DOJ, SEC 8-K, SC Consumer Affairs and Maryland AG, most recently reported on June 30, 2025.
Also listed as: Nucor; Nucor Corp
Breach notices filed with regulators
| Reported | Filed with | Breach date(s) | People affected | Data involved | Source |
|---|---|---|---|---|---|
| Jun 30, 2025 | New Hampshire DOJ | Not listed | Not listed | Not listed | Notice ↗ |
| Jun 27, 2025 | New Hampshire DOJ | Not listed | Not listed | Not listed | Notice ↗ |
| Jun 20, 2025 | SEC 8-K | May 13, 2025 | Not listed | Not listed | Notice ↗ |
| May 14, 2025 | SEC 8-K | May 13, 2025 | Not listed | Not listed | Notice ↗ |
| Jul 3, 2023 | SC Consumer Affairs | Not listed | 1,330 South Carolina residents | Not listed | Notice ↗ |
| Jun 28, 2023 | Maryland AG | Not listed | 4 Maryland residents | NameFinancial account information | Notice ↗ |
Each row is a notice as published by the agency. For state lists, the number affected counts only that state's residents; HHS lists the total reported. SEC rows are Form 8-K Item 1.05 filings, which usually don't give a count. A notice does not mean a settlement exists, and a settlement may cover a different incident than a given notice.
Is there a settlement?
We don't track an open class-action settlement for Nucor Corporation right now. Settlements usually come months or years after a breach. Get an email when new settlements are announced.
What you can do now
- Read the notice letter if you got one. It says what data was involved and may offer free credit monitoring with an enrollment deadline.
- Consider a free credit freeze at Equifax, Experian and TransUnion, especially if your Social Security number was involved.
- Change reused passwords and turn on two-factor authentication.
- Watch your bank, card and insurance statements for activity you don't recognize.
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