NOS SGPS

Share Issue/Capital Change • Jun 30, 2025

NOS, SGPS, S.A. Registered Office: Rua Ator António Silva 9 Campo Grande 1600-404 Lisbon Registered in the Commercial Registry Office of Lisbon and Corporation no. 504 453 513 Share Capital: 257,580,690.00 Euros

Registration of New Share Capital

Lisbon, June 30, 2025 In accordance with the provisions of Article 29-K of the Securities

approved at the Annual General Meeting of Shareholders held on April 11, 2025. The nominal value of each shares, which remains at 515,171,380, and the voting rights of 5,151,713.

As a result, numbers 1 and 2 of Article 4 of the company's bylaws have been amended.

This information is also available on NOS www.nos.pt/ir.

Lisbon, 30 June 2025

Contacts Pedro Cota Dias Head of Investor Relations & Corporate Finance Email: ir@nos.pt Tel.: +351 21 782 4700 Fax: +351 21 782 4735