Oi S A : Material Fact - Monocratic order in the context of an Interlocutory Appeal - The granting of suspensive effect to object to the effects of the decision that lead the judicial reorganization of the Grupo Oi into bankruptcy with the prosecution of judicial reorganization

Oi S.A. - In Judicial Reorganization CNPJ/MF No. 76.535.764/0001-43 NIRE 33.3.0029520-8

Publicly Traded Company

MATERIAL FACT

Monocratic order in the context of an Interlocutory Appeal

The granting of suspensive effect to object to the effects of the decision that lead the judicial reorganization of the Grupo Oi into bankruptcy with the prosecution of judicial reorganization

Oi S.A. - In Judicial Reorganization ("Oi" or "Company"), in compliance with the provisions set on Article 157, Paragraph 4, of Law No. 6,404/76 and CVM Resolution No. 44/2021 and in continuation of the Material Facts disclosed on 09/30/2025, 10/02/202, 10/31/2025, 11/07/2025 and 11/10/2025, informs its shareholders and the market in general that, on 11/14/2025, a monocratic order was rendered by the Reporting Judge of the 1st Chamber of Private Law of the Court of Justice of the State of Rio de Janeiro ("Monocratic Order"), in the Interlocutory Appeal proceedings no. 0096877-26.2025.8.19.0000, filed by Itaú Unibanco

S.A and no. 0096871-19.2025.8.19.0000, filed by Banco Bradesco S.A., both filed against the order that turned the judicial reorganization of the Company and its subsidiaries Portugal Telecom International Finance B.V. - In Judicial Reorganization and Oi Brasil Holdings Coöperatief U.A. - In Judicial Reorganization (together, "Oi Group") into bankruptcy, with provisional continuation of activities ("Judicial Order"), issued by the 7thBusiness Court of the Capital of the State of Rio de Janeiro ("Judicial Reorganization Court").

A Monocratic Order, in a preliminary analysis, granted the request for suspensive effect to the interlocutory appeal in order to halt the effects of the Judicial Order, determining that the Judicial Reorganization Court proceeds with the necessary legal formalities destined for the processing of the judicial reorganization of the Oi Group through the fulfillment of the reorganization plan approved by creditors and judicially confirmed.

The Monocratic Order determined, among others, the following measures:

1. the reinstatement of the Judicial Administrators WALD Administração de Falências e Empresas em Recuperação Judicial Ltda. and PRESERVA-AÇÃO Administração Judicial, the latter in the person of Dr. Bruno Galvão Souza Pinto de Rezende for the continuity in the role of Judicial Manager;

2. to be verified, in ancillary, the responsibility in terms of shareholding and directives of the company PIMCO; and

3. renew the determinations, at this procedural moment, of items 3.1, 3.2, 3.3, of the decision of fls.230429628, as follows:

"3.1) SUSPENSION of the enforceability of the post petition claims (obrigações extraconcursais), both past due and future, for a period of 30 (thirty) days;

3.2) REMOVAL of the member of the board and the Administrative Council of the management of companies, Oi Group and subsidiaries Serede e Tahto;

3.3) DETERMINE that no business is carried out through the company INTEGRA"

The entire Monocratic Order is available to shareholders and creditors on the Company's websites (https://www.oi.com.br/ri and https://recjud.com.br) and on the Empresas.NET System of the CVM (https://www.cvm.gov.br).

The Company will keep its shareholders and the market informed about the progress of the judicial reorganization proceedings, in terms of applicable legislation and regulations.

Rio de Janeiro, November 14, 2025

Oi S.A. - In Judicial Reorganization

p. Bruno Galvão Souza Pinto de Rezende