IONOS Group SE / DE000A3E00M1

IONOS Group SE: Disclosure pursuant to Art. 5 Sec. 1 b) and Sec. 3 of the Regulation (EU) No 596/2014 (MAR) in conjunction with Art. 2 Sec. 2 and Sec. 3 of the Commission Delegated Regulation (EU) No 2016/1052 // Share Buyback – 1st Interim Announcement   In the period from 26 November 2025 up to and including 28 November 2025, IONOS Group SE purchased a total of 60,479 treasury shares as part of the share buyback program. The start of the share buyback program was announced on 25 November 2025 in accordance with Art. 2 sec. 1 of the Commission Delegated Regulation (EU) 2016/1052 for 26 November 2025. Shares were bought as follows:

Date	Overall volume of the shares bought back daily (number)	Volume-weighted average stock market price in EUR (excluding incidental purchasing costs, rounded to four places according to commercial practice)
26.11.2025	31,476	27.6317
27.11.2025	16,566	27.8379
28.11.2025	12,437	27.8702

Therefore, the overall volume of the shares bought back by IONOS Group SE through the share buyback program since 26 November 2025 is 60,479 shares. Further information pursuant to Art. 5 sec. 1 b) and sec. 3 of the Regulation (EU) No 596/2014 in conjunction with Art. 2 sec. 2 and sec. 3 of the Commission Delegated Regulation (EU) No 2016/1052 is available online via http://www.ionos-group.com/investor-relations/share/share-buyback.html The purchase of the treasury shares was carried out by a bank mandated by IONOS Group SE exclusively via the Frankfurt Stock Exchange (XETRA trading).   Montabaur, 01 December 2025 IONOS Group SE The Management Board