Gerson Lehrman Group
Disclosed Mar 12, 20242 years agoConfirmed
What is known
| People affected | Not stated in the sources we have |
|---|---|
| Disclosed | Mar 12, 2024 |
| Discovered | Nov 12, 2023 |
| Happened | Nov 12, 2023 |
| Attack | Ransomware |
| Data exposed | Not stated |
| Sector | Other · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| California Attorney General breach notice: Gerson Lehrman Groupoag.ca.gov · Official notice | Official notice |
| Washington Attorney General breach notice: Gerson Lehrman Groupatg.wa.gov · Official notice | Official notice |
| Oregon DOJ breach notice: Gerson Lehrman Groupjustice.oregon.gov · Official notice | Official notice |
| Vermont Attorney General: 2024-03-12 Gerson Lehrman Group Data Breach Notice to Consumersago.vermont.gov · Official notice | Official notice |
| Indiana Attorney General 2024 data breach report: Gerson Lehrman Groupin.gov · Official notice | Official notice |
Notices filed
| Where | Filed | People |
|---|---|---|
| California AGresidents of CA | Mar 12, 2024 | |
| Washington AGresidents of WA | Mar 12, 2024 | 3,734 |
| Oregon DOJresidents of OR | Mar 12, 2024 | |
| Vermont AGresidents of VT | Mar 12, 2024 | |
| Indiana AGresidents of IN | Mar 12, 2024 | 1,833 |
History of this record
- 2026-09-25 · source: empty to https://www.in.gov/attorneygeneral/consumer-protection-division/id-theft-prevention/files/DB-Year-to-Date-Reportdec-2024.pdf · backfill source
- 2026-09-25 · source: empty to https://ago.vermont.gov/document/2024-03-12-gerson-lehrman-group-data-breach-notice-consumers · backfill source
- 2026-09-25 · attack: unknown to ransomware · backfill source
- 2026-09-25 · discovered: empty to 2023-11-12 · backfill source
- 2026-09-25 · added · backfill source
First seen 2026-09-25 (California AG), confirmed by California AG. Record counts are as reported. Not legal advice.