X0609 4 2026-10-15 0001513845 Nebius Group N.V. NBIS 0002091395 Grimme Arne true BURGERWEESHUISPAD 101 AMSTERDAM P7 1076 ER NETHERLANDS 1 1 Class A Shares 2026-10-15 4 P 0 148 169.99 A 6033 D Class A Shares 2026-10-16 4 P 0 148 169.99 A 6181 D The purchases reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on 15 June 2026. Due to the issuer's status as a foreign private issuer pursuant to Rule 3a12-3(b) under the Act, the reporting person's transactions in the issuer's equity securities are exempt from Sections 16(b) and 16(c) of the Act. /s/ Anna Akimova, attorney-in fact for Mr. Arne Grimme 2026-10-16