Bilfinger SE: Share Buyback

Disclosure according to Art. 5 para. 1(b), para 3 of Regulation (EU) No. 596/2014 in connection with Art. 2 para. 2 and 3 of Delegated Regulation (EU) 2016/1052

Share buyback – 28. Interim Reporting

In the time period from July 28, 2025 until and including August 01, 2025, a number of 11,219 shares were bought back within the framework of the share buyback of Bilfinger SE. The beginning of the share buyback on January 21, 2025 was disclosed on January 20, 2025 pursuant to Art. 5 para. 1 of Regulation (EU) No. 596/2014, Art. 2 para. 1 of Delegated Regulation (EU) 2016/1052.

Day of purchase Aggregated volume in shares Weighted average price [EUR] 28. July 2025 2,274 92.7434 29. July 2025 2,253 93.6277 30. July 2025 2,229 94.6347 31. July 2025 2,198 95.9682 01. August 2025 2,265 93.1174

The transactions are published in a detailed form on the website of Bilfinger SE (http://www.Bilfinger.com).

The total volume of shares which have been bought back within the framework of the share buyback in the time period of January 21, 2025, until and including August 01, 2025, amounts to 436,673 shares.

The purchase of the shares of Bilfinger SE is carried out exclusively via the stock exchange by a bank commissioned by Bilfinger SE.