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Lyon Management Group Data Breach

Posted on behalf of Arnold Law Firm on April 3, 2025 in Data Breach

NOTICE: If you received a NOTICE OF DATA BREACH letter from Lyon Living, contact the Arnold Law Firm at (916) 777-7777 to discuss your legal options, or submit a confidential Case Evaluation form here.

​On March 28, 2025, Lyon Management Group, Inc., doing business as Lyon Living (“Lyon Living”), reported a significant cybersecurity incident to the Attorney General of California. According to its report, Lyon Living detected suspicious activity within its IT network and, upon investigation, confirmed that an unauthorized third party had accessed and potentially acquired private and confidential personal information from its systems between March 14 and March 15, 2024 (the “Data Breach”). 

Recently, Lyon Living began sending notification letters to those affected by the Data Breach. Included in these letters is an offer of complimentary credit monitoring and identity theft protection services for impacted individuals. As of now, Lyon Living has not publicly disclosed the exact number of individuals impacted by the Data Breach. If you received a data breach notification letter from Lyon Living, it indicates that your information was affected by the Data Breach.

Founded in 1989, Lyon Living is a privately held real estate development and property management company headquartered in Newport Beach, California. The company specializes in the development and management of mixed-use developments, multi-family communities, hotels, resorts, and single-family homes across several states, including California, Nevada, Colorado, and Florida. With approximately 271 employees, Lyon Living generates an estimated annual revenue of $194 million. 

WHAT INFORMATION IS INVOLVED IN THE LYON MANAGEMENT GROUP DATA BREACH?

The type of compromised information varied among individuals and potentially included: 

  • Names,
  • Driver’s license number or other government-issued identification,
  • Social Security numbers,
  • Financial account information,
  • Medical information,
  • Health insurance information,
  • Biometric data. 

This information is called your Personally Identifiable Information (“PII”). It tells others about you and is considered part of your identity. Businesses are required to secure this information or risk facing statutory penalties, among other legal penalties. Stolen PII can be used by identity thieves to engage in fraudulent activity using your identity. 

Personal medical information (a specific type of PII) is referred to as Protected Health Information (“PHI”). It is protected under both state and federal law. Healthcare providers and other businesses who handle PHI are required to protect that information. Like stolen PII, stolen PHI can be used by identity thieves to engage in fraudulent activity using your identity. Quite often, PII and PHI are used in conjunction by hackers.

The best way to protect yourself after a data breach is to sign up for credit and identity protection services as soon as possible. 

California offers extra protections and legal rights to its residents through the California Consumer Privacy Act (“CCPA”).

NOTICE: If you received a NOTICE OF DATA BREACH letter from Lyon Living, contact the Arnold Law Firm at (916) 777-7777 to discuss your legal options, or submit a confidential Case Evaluation form here.