Mattel, Inc. (CIK 0000711710) filed its 10-K Item 1C disclosing no known cybersecurity threats or incidents that have materially affected its business or financial condition. The filing details robust cybersecurity governance, including a dedicated Head of Cybersecurity, an IT steering committee, and an Audit Committee oversight. Mattel employs third-party assessors and maintains incident response plans, but explicitly states it is not aware of any material breaches to date.