NOS, SGPS, S.A.

Public Company

Registered Office: Rua Ator António Silva 9 Campo Grande 1600-404 Lisbon

Share Capital: 5,151,613.80 Euros

Registered in the Commercial Registry Office of Lisbon

and Corporation no. 504 453 513

ANNOUNCEMENT

S&P Global Ratings affirms BBB- long term issuer credit rating and stable Outlook

Lisbon, 23 April 2021 Securities code and hereby informs:

Pursuant to the terms and for the purposes of article 248-A of the Portuguese , NOS, SGPS, S.A. (NOS)

-

Outlook.

S&P highlights NOSresilience to the Covid-19 pandemic, which did not materially affect its operation and credit metrics. Also highlighted are the solid competitive position, the quality and capillarity of the fixed and mobile networks and the solid balance sheet, which position the company comfortably at our BBB- rating level .

Maintaining its investment grade long term issuer credit rating with S&P enables NOS to reinforce the conditions to further diversify its sources of funding, extend average debt maturity and continue to reduce the already low average cost of debt.

This information is also available on NOS

www.nos.pt/ir.

Lisbon, 23 April 2021

Contacts

Maria João Carrapato

Head of Investor Relations

Email:ir@nos.pt

Tel.: +351 21 782 4725

Fax: +351 21 782 4735

Attachments

Disclaimer

Nos SGPS SA published this content on 23 April 2021 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 23 April 2021 16:39:00 UTC.