High SeverityFinancial Services·March 2026

Marquis

Financial services firm Marquis disclosed that a ransomware attack led to the theft of personal data for approximately 672,000 individuals.

Records Affected

Approximately 672,000

Sector

Financial Services

Data types exposed

NamesSocial Security NumbersFinancial Account InformationPersonal Information

Financial services firm Marquis disclosed a ransomware attack that resulted in the theft of personal data for approximately 672,000 individuals.

The compromised data reportedly includes personally identifiable information associated with the firm’s financial services operations. Marquis has begun notifying affected individuals in accordance with regulatory requirements.

Financial services firms continue to be high-value targets for ransomware groups due to the sensitivity of the data they hold and the regulatory pressure to resolve incidents quickly.

Sources

Sources

This alert is based on publicly available breach notification data and reporting. If you are a representative of the affected organisation and believe any information is inaccurate, please contact us at [email protected] and we will review and update this alert promptly.

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