Clustered 2 filings across 2 jurisdictions · filed May 31, 2017. View entity profile → Other incidents for this victim →
incident inc_48f27a5419e34e4f · merge_method deterministic · confidence 100%
Discovered → first regulatory filing
Time between earliest and latest filing
Not recorded for this incident
Discovery variance · Leak precedence · Materiality delta · SEC filing delay — no leak-site claim in this cluster; no SEC 8-K in this cluster; needs two dated filings.
CA OR
all State AG
Earliest sighting first · deep chronology in Litigation Timeline
May 15, 2017
When the intrusion reportedly occurred, per the linked filings
May 17, 2017
Reported by OREGON AG filing
BMO Harris Bank N.A. reported a data breach to the Oregon Attorney General. The breach was reported on 2017-05-31. The breach occurred during 5/15/2017 - 5/15/2017. The breach was discovered on 5/17/2017. 38,391 individuals were affected. Notice was sent on 5/25/2017.
Affected (this filing): 38,391
BMO Harris Bank N.A. notified customers of a misdelivery error during the production of 2016 IRS Form 5498. Some customers received their own form along with another customer's form, while others did not receive their form. The exposed data included name, address, last four digits of SSN, account number, IRA contributions, and Fair Market Value. The bank is mailing replacement forms and offering 12 months of credit monitoring.
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.