Clustered 5 filings across 3 jurisdictions · filing window Jan 22, 2021 → Jan 26, 2021. View entity profile → Other incidents for this victim →
incident inc_846884e439d74aaf · merge_method deterministic · confidence 100%
Discovered → first regulatory filing
Range of discovered_at dates across filings
Government ID · Identity (basic)
Time between earliest and latest filing
Not recorded for this incident
Leak precedence · Materiality delta · SEC filing delay — no leak-site claim in this cluster; no SEC 8-K in this cluster.
CA ME WA
all State AG
per-filing reported counts
State AGs report only their own residents; bars show per-filing counts.
Earliest sighting first · deep chronology in Litigation Timeline
Dec 28, 2020
When the intrusion reportedly occurred, per the linked filings
Dec 28, 2020
Reported by MAINE AG, WASHINGTON AG filings
About this clustering
DisclosureLens links filings into incidents through layered matchers: deterministic rules (same source document, multistate filings of one breach, tight-window same-victim pairs), a weighted-similarity scorer for cross-source candidates, and an operator review queue for everything uncertain. Each link records its own method and confidence — shown per filing in the timeline below. The system defaults to NOT merging when uncertain, because a false merge (collapsing two unrelated breaches) is more harmful than a false split (showing related filings separately); uncertain pairs route to human review instead of auto-merging. Filing summaries shown in the timeline are AI-generated extracts — verify each against its linked source.
thyssenkrupp Materials reported an external system breach (hacking) that occurred and was discovered on December 28, 2020. The incident affected 9,207 individuals, compromising names and Social Security numbers. The company began notifying affected individuals on January 19, 2021, and offered 24 months of credit monitoring and identity theft restoration services through TransUnion.
Affected (this filing): 9,207
On December 28, 2020, thyssenkrupp Materials (US and Canada) suffered a ransomware attack that encrypted servers and workstations. The threat actor had access to HR data including employee names, addresses, SSNs, birthdates, direct deposit/payroll information, health information, and contact details. The company isolated the attack, hardened systems, and offered 24-month credit monitoring to affected current and former employees.
thyssenkrupp Materials experienced an external system breach on December 28, 2020, which was discovered the same day. The breach resulted in the compromise of Social Security numbers. The company provided written notification to affected individuals on January 19, 2021, and offered 24 months of credit monitoring and identity theft restoration services through TransUnion. The incident affected one resident of Maine.
Affected (this filing): 1
thyssenkrupp Materials reported an external system breach (hacking) on 12/28/2020, affecting 10,462 individuals, including 1 Maine resident. The breach involved the acquisition of names and Social Security Numbers. Written notification was sent on 01/19/2021, offering 24 months of credit monitoring and identity theft restoration services via TransUnion.
Affected (this filing): 10,462
thyssenkrupp Materials, a business sector entity reported a ransomware incident to the Washington Attorney General. The organization became aware of the incident on 2020-12-28 and filed notice on 2021-01-26. 1,250 Washington residents were affected. 29 days elapsed between awareness and notification. 0 days to identify the breach. 0 days to contain the breach.
Affected (this filing): 1,250