Sonic Automotive, Inc. filed an 8-K/A (Amendment No. 1) on August 5, 2024, providing supplemental information about a cybersecurity incident affecting CDK Global on June 19, 2024. The incident disrupted Sonic Automotive's access to its DMS and CRM systems. Systems were restored, but operational disruptions continued through July. The incident materially impacted Q2 2024 results, adversely affecting GAAP EPS by approximately $0.64.