Novabase Sgps SaEURONEXT: NBA

- SGPS, S.A. informs about interim report on the transactions conducted under the share buy-back programme

· Issued by Novabase Sgps Sa
‌Announcement pursuant to articles 5(1) (b) of Regulation (EU) 596/2014 and 2(3) of Commission Delegated Regulation (EU) 2016/1052: Interim report on the transactions conducted under the share buy-back programme

Lisbon, 14 May 2026

As disclosed to the market in due time, on 19 December 2024, the company Novabase -Sociedade Gestora de Participações Sociais, S.A. ("Novabase" or the "Company") started trading in the context of the own shares buy-back programme (the "Buy-Back Programme") approved on the Board of Directors' meeting held in 19 December 2024, under the authorisation granted in Item Nine of the Agenda of the General Meeting of shareholders of Novabase that took place on 22 June 2024, and in the terms and conditions of the announcement regarding the start of trading under the Buy-Back Programme, disclosed by the Company on the 19 December 2024.

In this context, Novabase informs that, pursuant to articles 5(1)(b) of Regulation (EU) 596/2014 of the European Parliament and of the Council of 16 April 2014 and 2(3) of Commission Delegated Regulation (EU) 2016/1052 of 8 March 2016, as well as pursuant to the CMVM Regulation no. 1/2023, in the period from the 7 May 2026 and 14 May 2026 (inclusively), Caixa - Banco de Investimento, S.A., has acquired shares representing Novabase's share capital, under the Buy-Back Programme and as the financial intermediary in charge of the execution of the programme in Euronext Lisbon's regulated market, as detailed in the table below (aggregated information):

María Gil Marín

Chief Investors Officer Tel: +351 21 3836300

Fax.: +351 21 3836301

investor.relations@novabase.com

Novabase - Sociedade Gestora de Participações Sociais, SA Company issuing shares admitted to trading on a regulated market

Registered Office: Av. D. João II, nº 34, Parque das Nações, 1998-031 Lisboa Share Capital: € 1,152,569.19

Lisbon Commercial Registry Office registration and legal person number 502.280.182

Date of the Transaction

Aggregated Volume (shares)

Weighted Average Price (EUR)

% Share Capital

07/05/2026

200

8.760

0.001

08/05/2026

-

-

-

11/05/2026

-

-

-

12/05/2026

1,345

8.880

0.004

13/05/2026

-

-

-

14/05/2026

650

8.825

0.002

On the 14 May 2026, Novabase held, as a result of the transactions indicated herein, an aggregated total of 734,404 own shares, representing 1.91% of the Company's share capital.

Further detailed information on all transactions carried out, under the Buy-Back Programme, in the period from the 7 May 2026 and the 14 May 2026 (inclusively), may be found in the in the documents annexed hereto.

María Gil Marín

Chief Investors Officer Tel: +351 21 3836300

Fax.: +351 21 3836301

investor.relations@novabase.com

Novabase - Sociedade Gestora de Participações Sociais, SA Company issuing shares admitted to trading on a regulated market

Registered Office: Av. D. João II, nº 34, Parque das Nações, 1998-031 Lisboa Share Capital: € 1,152,569.19

Lisbon Commercial Registry Office registration and legal person number 502.280.182

‌C/V Contrata Título Tp. Neg.‌ Qtd./Montante Pr.Médio Importância Dias Juros Tx.Corr. I.S.C orr. Tx.Bolsa Outros Encargos Pr.Unit.Liq. Vl. Líquido Data de Liquidação: 11/05/2026 Moeda: EUR Praça: EURONEXT LISBOA

C 2026050700309 NOVABASE SGPS N P ISIN: PTNBA0AM0006

200

8,76000000

1 752,00

1,31

0,05

0,00

0,00

-8,76680000

-1 753,36

Total de Compras:

1 752,00

1,31

0,05

0,00

0,00

-1 753,36

Total da Praça EURONEXT LISBOA:

1,31

0,05

0,00

0,00

-1 753,36

Total:

1,31

0,05

0,00

0,00

-1 753,36

Liquidação Financeira

Banco de Portugal: 11/05/2026

EUR

-1 752,00

CAIXA BI

EUR

-1,36

‌C/V Contrata Título Tp. Neg.‌ Qtd./Montante Pr.Médio Importância Dias Juros Tx.Corr. I.S.C orr. Tx.Bolsa Outros Encargos Pr.Unit.Liq. Vl. Líquido Data de Liquidação: 14/05/2026 Moeda: EUR Praça: EURONEXT LISBOA

C 2026051200105 NOVABASE SGPS N P ISIN: PTNBA0AM0006

1 345

8,88034201

11 944,06

8,96 0,36

0,00

0,00

-8,88727138

-11 953,38

N.º de Negócio

Qtd./Mont. Neg.

Preço Neg.

Cotação

Hora Neg.

2561

250

8,98000000

Vista

09:11:19 634000

3073

294

8,96000000

Vista

09:13:31 632000

4097

796

8,82000000

Vista

12:53:56 777000

4353

5

8,82000000

Vista

12:58:21 342000

Total de Compras:

11 944,06

8,96 0,36

0,00

0,00

-11 953,38

Total da Praça EURONEXT LISBOA: 8,96 0,36 0,00 0,00 -11 953,38 Total: 8,96 0,36 0,00 0,00 -11 953,38 Liquidação Financeira

Banco de Portugal: 14/05/2026

EUR

-11 944,06

CAIXA BI

EUR

-9,32

‌C/V Contrata Título Tp. Neg.‌ Qtd./Montante Pr.Médio Importância Dias Juros Tx.Corr. I.S.C orr. Tx.Bolsa Outros Encargos Pr.Unit.Liq. Vl. Líquido Data de Liquidação: 18/05/2026 Moeda: EUR Praça: EURONEXT LISBOA

C 2026051400188 NOVABASE SGPS N P ISIN: PTNBA0AM0006

650

8,82461539

5 736,00

4,30 0,17

0,00

0,00

-8,83149231

-5 740,47

N.º de Negócio

Qtd./Mont. Neg.

Preço Neg.

Cotação

Hora Neg.

2049

150

8,94000000

Vista

13:45:53 407000

3841

250

8,80000000

Vista

14:30:18 136000

5121

250

8,78000000

Vista

15:01:03 465000

Total de Compras:

5 736,00

4,30 0,17

0,00

0,00

-5 740,47

Total da Praça EURONEXT LISBOA: 4,30 0,17 0,00 0,00 -5 740,47 Total: 4,30 0,17 0,00 0,00 -5 740,47 Liquidação Financeira

Banco de Portugal: 18/05/2026

EUR

-5 736,00

CAIXA BI

EUR

-4,47

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