On March 28, 2025, Lyon Management Group, Inc. d/b/a Lyon Living (“Lyon”) filed a notice of data breach with the Attorney General of California after discovering that an unauthorized party was able to access the company’s IT network. In this notice, Lyon explains that the incident resulted in an unauthorized party being able to access consumers’ sensitive information. Upon completing its investigation, Lyon began sending out data breach notification letters to all individuals whose information was affected by the recent data security incident.
If you received a data breach notification from Lyon Management Group, Inc., it is essential you understand what is at risk and what you can do about it. A data breach lawyer can help you learn more about how to protect yourself from becoming a victim of fraud or identity theft, as well as discuss your legal options following the Lyon Living data breach. For more information, please see our recent piece on the topic here.
What Caused the Lyon Living Data Breach?
The Lyon Living data breach was only recently announced, and more information is expected in the near future. However, Lyon Living’s filing with the Attorney General of California provides some important information on what led up to the breach. According to this source, Lyon recently became aware of suspicious activity within its computer network. In response, Lyon secured its systems, notified law enforcement, and then launched an investigation to learn more about the incident.
Through this investigation, Lyon confirmed that an unknown and unauthorized party was able to access part of the company’s network between March 14, 2024 and March 15, 2024, including files containing confidential consumer information.
After learning that sensitive consumer data was accessible to an unauthorized party, Lyon Living reviewed the compromised files to determine what information was leaked and which consumers were impacted.
While the publicly available data breach letter on the California Attorney General’s website does not mention what data types were leaked, on March 28, 2025, Lyon Management Group sent out personalized data breach letters to anyone who was affected by the recent data security incident. These personalized letters should provide victims with a list of what information belonging to them was compromised.
More Information About Lyon Management Group, Inc.
Lyon Management Group, Inc. is a privately held real estate company specializing in the development, construction, and management of multifamily and mixed-use communities, hotels, resorts, retail spaces, corporate housing, custom homes, and golf course developments. Headquartered in Newport Beach, California, the company operates properties across several states, including California, Nevada, Colorado, and Florida. Founded in 1989, Lyon Living employs approximately 271 people and generates an estimated annual revenue of $194 million.