Clustered 3 filings across 3 jurisdictions · filing window May 3, 2016 → May 4, 2016. View entity profile → Other incidents for this victim →
incident inc_84b0f696c066458c · merge_method deterministic · confidence 100%
Discovered → first regulatory filing
Time between earliest and latest filing
Not recorded for this incident
CA MT NH
all State AG
Earliest sighting first · deep chronology in Litigation Timeline
Mar 25, 2016
When the intrusion reportedly occurred, per the linked filings
Mar 25, 2016
Reported by NEW HAMPSHIRE AG filing
Charles Schwab & Co., Inc. notified clients of unusual login activity beginning on or after March 25, 2016. The incident involved credential stuffing, where attackers used usernames and passwords obtained from non-Schwab sites to access Schwab accounts. Affected data included names, account numbers, positions, and transaction history. Schwab restricted access and monitored accounts.
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.
Charles Schwab & Co., Inc. notified customers of unusual login activity beginning on or after March 25, 2016. The company believes attackers obtained usernames and passwords from non-Schwab accounts and used automated programs to test them against Schwab accounts (credential stuffing). Affected data includes names, account numbers, positions, and transaction history. Schwab restricted online access for affected accounts and is contacting clients to re-establish access. No indication that holdings were impacted.
Charles Schwab & Co. reported a data breach to the Montana Attorney General. The breach was reported on 2016-05-04. The breach occurred on 3/25/2016. 6 Montana residents were affected.
Affected (this filing): 6