NOS SGPS

Capital/Financing Update • Jun 25, 2025

NOS, SGPS, S.A. Registered Office: Rua Actor António Silva, 9, Campo Grande, 1600-404 Lisbon Share Capital: 855,167,890.80 Euros Lisbon Commercial Registry and Legal Entity Number 504 453 513

NOS SECURES 100 MILLION IN BANK FINANCING

N term and a maturity date set for 2029. This new credit facility is intended to refinance another line which was scheduled to mature in June 2025.

This new credit line helps to maintain a very competitive average funding cost compared to its national and European peers and extends the company´s average debt maturity.

As of 31 March 2025, NOS's Net Financial Debt to EBITDA After Leases ratio stood at 1.5x (below the reference defined in its financial policy of approximately 2x), reflecting the company's prudent financial management and the strength of its balance sheet.

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

Lisbon, 25 June 2025

Contacts Pedro Cota Dias Director of Investor Relations and Corporate Finance Email: ir@nos.pt Tel.: +351 21 782 4725 Fax: +351 21 782 4735