X0609 4 2026-05-22 0001451505 Transocean Ltd. RIG 0001350114 INTRIERI VINCENT J true TURMSTRASSE 30 STEINHAUSEN V8 6312 SWITZERLAND true false false false 0 Restricted Units 0 2026-05-22 4 A 0 30435 0 A Registered Shares 30435 30435 D Restricted Units, which are 1-for-1 registered share equivalents, were acquired on May 22, 2026, pursuant to the Issuer's long-term incentive plan. Restricted Units vest on the earlier of: (i) May 22, 2027, or (ii) the date of the next Annual General Meeting of the Company's shareholders following the May 22, 2026 grant date. Such Restricted Units will be payable in registered shares of the Issuer following the applicable vesting date, pursuant to the terms and conditions of the award. /s/ Debra Kupferman by Power of Attorney 2026-05-27