NOS SGPS

M&A Activity • Mar 6, 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)

Pursuant to the announcement made on the 27th of January of 2025, NOS, SGPS, S.A. hereby informs of the notice of clearance from the Portuguese Competition Authority for the acquisition of 100% of the share capital of Claranet Portugal, S.A. (process Ccent/2025/10 - NOS Tech / Claranet).

The closing of the transaction will take place after the material acts necessary to complete the acquisition have been carried out and will be communicated to the market in due course.

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

Lisbon, 6th March 2025

Fax: +351 21 782 4735

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