Level 3 Parent, LLC

Lumen Technologies' Item 1C cybersecurity disclosure in its annual report describes its cybersecurity risk management program, governance (Board Risk and Security Committee, CSO, CIRT/CSWAT teams), third-party vendor risk management, and incident response playbook. The filing acknowledges that some prior attacks have resulted in security incidents but states none has had or is reasonably likely to have a material adverse effect. No specific incident, threat actor, affected count, or data types are disclosed.