NOS SGPS

M&A Activity • Mar 17, 2025

NOS, SGPS, S.A. Registered Offices: Rua Actor António Silva 9 - Campo Grande, 1600-404 Lisbon Registration number before the Companies Registry and taxpayer number 504 453 513 Registered Share Capital: EUR 855,167,890.80

Announcement

Translation of the Portuguese Original (In the event of any discrepancy, Portuguese Original shall prevail)

Following the communications issued on January 27 and on March 6, NOS, SGPS, S.A. announces that, as of today, it has successfully completed the acquisition of 100% of the share capital of Claranet Portugal, S.A., after fulfilling all necessary requirements for the closing of the transaction

This information is also available on NOS' Investor Relations website in www.nos.pt/ir.

Lisbon, 17th March 2025

Contacts Maria João Carrapato Head of Investor Relations & Sustainability Email: ir@nos.pt Tel.: +351 21 782 4725 Fax: +351 21 782 4735