TEGNA Inc. (ticker: TNA) discloses in its 10-K Item 1C that it has experienced threats to information systems and data from time-to-time, but states these have not materially affected its business, results of operations, or financial condition. The filing details robust cybersecurity governance, including NIST framework adoption, Board oversight, and third-party risk management, but does not describe any specific incident, breach, or material impact.