This document is a Certificate of Corporate Disclosure filed by the petitioner, Telefónica, S.A., pursuant to Local Civil Rule 26.1 of the United States District Court for the District of Columbia. The filing was submitted in the context of proceedings against the respondent, the Republic of Colombia.

The primary procedural purpose of this certificate is to identify any parent companies, subsidiaries, affiliates, or entities holding at least a ten percent ownership interest in the petitioner's stock that have outstanding securities in the hands of the public. Such disclosures are mandated to enable the presiding judicial officers to evaluate potential conflicts of interest and determine the necessity for recusal.

In this submission, counsel for the petitioner formally certified that Telefônica Brasil SA is the sole affiliated entity meeting the statutory disclosure criteria. The document contains no substantive legal arguments or requests for judicial relief, serving strictly as a mandatory administrative compliance filing within the broader procedural framework of the dispute.