AssetMark Trust Data Breach Exposes Social Security Numbers

AssetMark Trust Company, a financial services firm that provides custodial and recordkeeping services for financial advisors and their clients, disclosed a data breach.

AssetMark Trust Company operates as a specialized division of AssetMark Inc. The company was founded in 1996, is headquartered in Concord, California, and employs over 1,000 people.

The breach resulted in the exposure of consumers' personally identifiable information (PII). The specific types of data compromised in the incident included names and Social Security numbers.

The breach was reported to the Texas Attorney General on May 8, 2026, with 359 Texas residents identified as affected.

AssetMark Trust Company's response to the breach

AssetMark Trust Company is notifying affected individuals by U.S. Mail. Consumers who believe they may have been impacted by this breach should watch their mailboxes for official correspondence from the company in the coming weeks.

Affected individuals should treat any notification they receive with urgency and take prompt action to safeguard their personal information.

Notification letters from companies that have experienced data breaches typically contain important details, including a description of what happened, an explanation of what types of information were involved and a summary of what steps the company is taking in response.

Steps to take if your information was exposed

• Place a fraud alert or credit freeze with all three major credit bureaus: Equifax (1-800-525-6285), Experian (1-888-397-3742) and TransUnion (1-800-680-7289).
• Request free credit reports at AnnualCreditReport.com and review them carefully for unfamiliar accounts, hard credit inquiries or other suspicious changes.
• Monitor bank and financial account statements closely for any unauthorized transactions, and report suspicious activity to the relevant financial institution right away.
• Consider requesting an IRS Identity Protection PIN at IRS.gov to help prevent the filing of fraudulent tax returns.
• Be cautious of phishing attempts that reference AssetMark Trust Company or this breach by name, as scammers often exploit real data breach events to trick people into sharing additional personal information.
• Report any signs of identity theft to the Federal Trade Commission at IdentityTheft.gov for guidance on next steps and recovery.