Great Northern Corporation
bd_012fcfcd4fcb7b34 · schema v1 · pii pii-v1
Full breach record for Great Northern Corporation →Great Northern Corporation, a commercial entity based in Appleton, WI, reported a ransomware incident on September 5, 2020, discovered on December 21, 2020. The breach affected 5,097 individuals, including one Maine resident. Personal information, specifically Social Security Numbers, was compromised. The company provided 12 months of credit monitoring through TransUnion.
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Incident timeline
Sep 5, 2020
Begins
Dec 21, 2020
Discovered
Feb 9, 2021
Filed
vs. sector median
+1 wks slower
Linked disclosures
Why this link?Regulatory filings (4) · sorted by filing gap
- Massachusetts State AGbd_24c25d4bf466e54f2021-02-09Verified
- Indiana State AGbd_afed8c1c3000916d2021-02-09Verified
- New Hampshire State AGbd_6006a1a18b3c17ba2021-02-18 · +9dVerified by operator
- Illinois State AGbd_b8212f372559ecc12021-01-01 · +39dVerified by operator
Filing propagation · 5 filings · 5 states
View merged incident ↗Pattern: first filing Jan 1 (IL), last Feb 18 (NH) — a 48-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?
Evidence ladder
Attacker assertion only. Establishes: claim date, group, alleged victim.
Unlocks: incident narrative, operational impact. Still no compliance clock.
Unlocks: discovery date, data types, affected count, compliance clock.
Unlocks: materiality, stated response, full audit trail. Ceiling removed.