Cyber Incident Victim: AssetMark, Inc.
Date:
May 2026
Location:
United States of America
Summary
AssetMark, Inc. discovered suspicious activity associated with login information and learned that an unauthorized user accessed and obtained certain files containing customer information. The exposed data may include names, Social Security numbers, financial account details, and government identification numbers, affecting approximately 570,000 individuals. Those who received a breach notification face an increased risk of identity theft and fraud. In response, Edelson Lechtzin LLP has launched an investigation into potential class action claims on behalf of affected individuals.
| CIA Posture | Motives | Tactics, Techniques & Procedures |
|---|---|---|
| Available to members | 0 motives | 0 techniques |
| Threat Actors | Type | Location |
|---|---|---|
| 0 actors | Available to members | Available to members |
Description
On or about May 15, 2026, AssetMark, Inc. discovered suspicious activity associated with login information on its systems. An unauthorized user subsequently accessed and obtained certain files containing customer information. The exposed data included names, Social Security numbers, financial account information, and government identification numbers. Approximately 570,000 individuals were identified as potentially affected by the breach. AssetMark, Inc. provides technology, investment solutions, and professional support services to independent financial advisors. The company’s headquarters are located in Concord, California.
Individuals who received a data breach notification from AssetMark, Inc. were informed that they may face an increased risk of identity theft and fraud. In response to the incident, Edelson Lechtzin LLP, a national class action law firm with offices in Pennsylvania and California, launched an investigation into the breach. The firm is evaluating whether to pursue a class action on behalf of those whose sensitive personal data may have been compromised. Edelson Lechtzin LLP also handles matters such as securities and investment fraud, federal antitrust violations, ERISA employee benefit plans, wage theft, and consumer fraud. The investigation aims to determine the legal remedies available to affected individuals. No further details about the attacker’s identity or the specific vulnerability exploited have been disclosed in the source material.