AccidentalMisdeliveryCustomer Data InvolvedIDENTITY_BASICIDENTITY_GOVERNMENTFINANCIAL_ACCOUNTMediumResolved
American Stock Transfer & Trust Company, LLC
bd_c3bf1b4d8432d124 · schema v1 · pii pii-v1
Full breach record for American Stock Transfer & Trust Company, LLC →American Stock Transfer & Trust Company, LLC disclosed that an employee mistakenly sent a file containing shareholder information (names, addresses, SSNs, and financial account details) to 34 financial advisors. The file allowed advisors to potentially access data for non-clients. The company suspended access, investigated, and confirmed deletion of the files by recipients. Complimentary identity protection was offered.
California clockDiscovered Feb 1, 2018 → Notified Feb 2, 20181d ✓ CA 60-day OK15 days discovery → filing
Tracked as a single-filing incident — the only disclosure on record for this event so far.ConfirmedView incident
Source provenance
- Source URL
- https://oag.ca.gov/ecrime/databreach/reports/sb24-133853
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
- Filed at
- Feb 16, 2018
- Raw hash
- acf31e8d11e63dfd2ccde820fab135678fbeb0a65441e8ab6923d9c382d100a9
Reporting entity
- Name
- American Stock Transfer & Trust Company, LLCnorm: american stock transfer
Victim entity
- Name
- American Stock Transfer & Trust Company, LLCnorm: american stock transfer
Incident
- Discovered
- Feb 1, 2018
- Materiality determined
- —
- Notification sent
- Feb 2, 2018
- Affected individuals
- Not disclosed
- Data types
- IDENTITY_BASICIDENTITY_GOVERNMENTFINANCIAL_ACCOUNT
- Attack vector
- Unknown
- Threat actor
- Internal
Compliance
- Time to disclose
- 15 days(15 days from discovery to filing)
- Compliance flags
- CA 60-day OK · 1d
- Discovery-date grounding
- letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.
- Clock breakdown
Statute Window Elapsed Threshold Status California Discovered: Feb 1, 2018→ Notified: Feb 2, 20181d 60 days (analyst band, pre-2026 discoveries) CA 60-day OK
Extraction provenance
- Status
- No extraction artifact recorded for this disclosure.