In accordance with the regulations, DEME Group NV hereby discloses information regarding the acquisition of own shares. All details related to the acquisition of own shares by DEME Group NV can be found on www.deme-group.com/   Attachment P2026 DEME SBB 20260608 ENG

8 June 2026

In accordance with the regulations, DEME Group NV hereby discloses information regarding the acquisition of own shares. All details related to the acquisition of own shares by DEME Group NV can be found on www.deme-group.com/   Attachment P2026 DEME SBB 20260601

1 June 2026
Through its Japanese joint venture Japan Offshore Marine (JOM), DEME has secured a contract for the Oga–Katagami–Akita Offshore Wind Project. The contract covers the engineering works and vessel charter for the offshore installation of 21 wind turbines under the contract between Oga Katagami Akita
29 May 2026

In accordance with the regulations, DEME Group NV hereby discloses information regarding the acquisition of own shares.  All details related to the acquisition of own shares by DEME Group NV can be found on www.deme-group.com/     Attachment P2026 DEME SBB 20260526 ENG

26 May 2026
DEME (Euronext: DEME) held its Annual General Meeting today at the DEME headquarters. The shareholders approved all agenda items of the Annual General Meeting with a vast majority. Following the proposal of the Board of Directors, the shareholders approved the distribution of a gross dividend of
20 May 2026

In accordance with the regulations, DEME Group NV hereby discloses information regarding the acquisition of own shares.  All details related to the acquisition of own shares by DEME Group NV can be found on www.deme-group.com/     Attachment P2026 DEME SBB 20260518 ENG

18 May 2026
Highlights first quarter 2026 Solid start to the year with group turnover amounting to 1,016 million euros, up 2% compared to 993 million euros a year ago Order book remains at a healthy level at 7.4 billion euros, compared to 7.6 billion euros a year ago and at the end of 2025 Management reaffirms
13 May 2026

In accordance with the regulations, DEME Group NV hereby discloses information regarding the acquisition of own shares.  All details related to the acquisition of own shares by DEME Group NV can be found on www.deme-group.com/     Attachment P2026 DEME SBB 20260511 ENG

11 May 2026