DisclosureLens
UnknownFinanceMedium

BMO Bank N.A.

bd_5a4bffd812ee1754 · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 17, 2017

Filed

May 31, 2017

To disclose

14 days

Affected

38,391

Linked

5 filings

Confidence

95%
Full breach record for BMO Bank N.A. →4 incidents on file

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.

Oregon clock✓ OR AG ≤45d14 days discovery → filing
⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 2 days
discovery → filing · 14 days

May 15, 2017

Begins

May 17, 2017

Discovered

May 31, 2017

Filed

This filing is one of 5 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Filing propagation · 5 filings · 5 states

View merged incident ↗
Montana State AGMay 24 · first
Massachusetts State AG+7d
California State AG+7d
Washington State AG+7d
Oregon State AG+7d · this page

Pattern: first filing May 24 (MT), last May 31 (OR) — a 7-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.