HackingFinancial ServicesFinanceHacking OtherCustomer Data InvolvedIdentity (basic)Financial accountMediumResolved

THORNBURG INVESTMENT MANAGEMENT, INC.

bd_e6d0b2bb47409736 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Apr 13, 2021

Filed

Jan 7, 2022

To disclose

38 weeks

Affected · nationwide

3,2807 in this filing

Linked

6 filings

Confidence

50%

Full breach record for THORNBURG INVESTMENT MANAGEMENT, INC. →

Thornburg Investment Management reported an external system breach that occurred between March and April 2021. The breach was discovered in April 2021 and affected 7 Maine residents. The compromised information included names and financial account numbers. The company offered 12 months of identity and credit monitoring services to the affected individuals.

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Maine clockDiscovered Apr 13, 2021 → Filed with AG Jan 7, 2022269d ⏱ ME AG >30d38 weeks 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 · 15 days

discovery → filing · 38 weeks / 269 days

Mar 29, 2021

Begins

Apr 13, 2021

Discovered

Jan 7, 2022

Filed

vs. sector median

+30 wks slower

This filing is one of 6 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

Indiana State AGbd_69f5df6975be89742022-01-07Verified
Massachusetts State AGbd_a1ed418fcd6b26562022-01-07Verified
Montana State AGbd_b2e15db64b4a5c152022-01-07Verified
New Hampshire State AGbd_94c827c06515004b2022-01-12 · +5dVerified

Show 1 more filing ↓up to 27d gap

Maine State AGbd_ca2dc835fc9b5f492022-02-03 · +27dVerified

Name: THORNBURG INVESTMENT MANAGEMENT, INC.
norm: thornburg investment management

Name: THORNBURG INVESTMENT MANAGEMENT, INC.
norm: thornburg investment management
Industry: Financial Servicesllm

Discovered: Apr 13, 2021
Breach occurred: Mar 29, 2021 – Apr 30, 2021
Undetected for: 15 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jan 7, 2022
Affected individuals: 3,280state + nationwide
Data types: Identity (basic)Financial account
Data elements: Financial account number
Attack vector: Unauthorized Access

Changes made: Offered 12 months of identity and credit monitoring through Equifax
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 38 weeks(269 days from discovery to filing)
Compliance flags: ME AG >30d · 269dME resident >60d · 269d
Discovery-date grounding: 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.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Apr 13, 2021
→ Filed with AG: Jan 7, 2022
269d 30 days (soft) ME AG >30d
Maine
Discovered: Apr 13, 2021
→ Notified: Jan 7, 2022
269d 60 days (analyst band; statutory cap is 30 days) ME resident >60d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Apr 13, 2021 → Filed with AG: Jan 7, 2022	269d	30 days (soft)	ME AG >30d
Maine	Discovered: Apr 13, 2021 → Notified: Jan 7, 2022	269d	60 days (analyst band; statutory cap is 30 days)	ME resident >60d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 6 filings · 5 states

View merged incident ↗

Indiana State AGJan 7 · first

Massachusetts State AGJan 7 · first

Montana State AGJan 7 · first

Maine State AGJan 7 · first · this page

New Hampshire State AG+5d

Maine State AG+27d

Pattern: first filing Jan 7 (IN), last Feb 3 (ME) — a 27-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.

Source URL: https://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/7b17691e-5ce3-467d-9bdc-87b4333115c0.shtml
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jan 7, 2022
Raw hash: 0be13e1df2bb34f79d32c7742c9a2e2151678f4104cf5b429516bce847953873

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entityTHORNBURG INVESTMENT MANAGEMENT, INC.

Victim entityTHORNBURG INVESTMENT MANAGEMENT, INC.

Incidentdiscovered Apr 13, 2021

Stated responseOffered 12 months of identity and credit monitoring through Equifax

ComplianceME AG >30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov