Transactions in connection with share buy-back programme 17-23 September 2026

Vestas Wind Systems A/S, Aarhus, 24 September 2026 Company Announcement No. 52/2026 On 12 August 2026, Vestas announced the initiation of a share buy-back programme, cf. Company Announcement No. 46/2026. The programme is implemented in accordance with Regulation No. 596/2014 of the European Parliament and of the Council of 16 April 2014 on market abuse (MAR) and the Commission Delegated Regulation (EU) 2016/1052 (the "Safe Harbour Regulation"). Prior to the share buy-back, Vestas held 14,228,701 treasury shares, equal to 1.4 percent of the share capital. Under the programme, Vestas will buy back shares for an amount up to DKK 3,000m (approx. EUR 400m) in the period from 13 August 2026 and until no later than 16 December 2026. The following transactions have been made under the programme during the period 17-23 September 2026: Number of shares Weighted average purchase price, DKK Transaction value, DKK Previously accumulated under the programme 4,055,000 210.11 851,998,813.00 Transact