On June 19, 2024, Group 1 Automotive, Inc. was informed of a cybersecurity incident at CDK Global LLC, its SaaS dealer management system provider. The CDK incident caused service outages disrupting Group 1's U.S. dealership business applications. U.K. dealerships were unaffected. Group 1 activated cyber incident response procedures and isolated its systems from CDK's platform. U.S. dealerships continued operating using alternative processes. Filed as Item 8.01 (Other Events).