X0609 4 2026-05-13 0001513845 Nebius Group N.V. NBIS 0002115814 Korolenko Andrey true SCHIPHOL BOULEVARD 165 SCHIPHOL P7 1118BG NETHERLANDS 1 Chief Infrastructure Officer 0 Class A Shares 2026-05-13 4 M 0 500000 0 A 1085209 D Class A Shares 2026-05-13 4 S 0 500000 203.24 D 585209 D Stock Options 100.00 2026-05-13 4 M 0 500000 0 D 2025-03-31 2035-04-10 Class A Shares 500000 1500000 D The sales reported on this Form 4 were made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 2, 2025. The options vested in quarterly installments beginning on March 31, 2025. 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. Korolenko 2026-05-15