Lockton (Southeast Series) data breach impacts over 1.1 million individuals
A cybersecurity incident occurred on November 20, 2024, where an unauthorized party gained access to a single individual account and computer within the Lockton environment, specifically the Southeast Series of Lockton…
Key points
- Cybersecurity incident occurred on November 20, 2024.
- Unauthorized access to a single account and computer within Lockton's Southeast Series.
- Over 1.1 million individuals affected.
Connected intelligence
Signal brief
Follow the organization, likely method and potential impact to explore connected Shadow Tier intelligence.
Organization
- Published
- Nov 20, 2024
- Updated
- Jul 2, 2026
- Confidence
- High
- Evidence
- 3 sources
Structured assessment
Signal analysis
This analysis groups the signal by industry, likely incident action and impacted security area. It helps compare this signal with other published signals without treating the labels as final determinations.
Threat source
Watch exposure paths that could affect data, operations or third-party trust.
Business impact
- Impact area
- Confidentiality
- Likely asset
- User or customer data
Mentioned entities
Quick context
Questions about this signal
What happened in this signal?
A cybersecurity incident occurred on November 20, 2024, where an unauthorized party gained access to a single individual account and computer within the Lockton environment, specifically the Southeast Series of Lockton Companies. This breach resulted in the unauthorized acquisition of files containing sensitive personal and protected health information for more than 1.1 million individuals. The compromised data includes names, addresses, phone numbers, email addresses, dates of birth, Social Security numbers, and financial information. Notification letters to affected individuals were sent in March 2025.
When was this signal reported?
Shadow Tier lists Nov 20, 2024 as the signal date.
Which organization is connected to this signal?
Lockton is the organization connected to this public signal.
Explore LocktonRelated signals
Compare shared topics, actors and incident patterns before opening the full signal.
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