X0508 4 2026-02-05 0001451505 Transocean Ltd. RIG 0002022236 Vayda Robert Thaddeus 1414 ENCLAVE PARKWAY HOUSTON TX 77077 false true false false EVP, Chief Financial Officer 0 Registered Shares 2026-02-05 4 M 0 34726 0 A 269880 D Registered Shares 2026-02-06 4 F 0 10947 4.99 D 258933 D Registered Shares 91 I By Child Restricted Units 0 2026-02-05 4 A 0 239740 0 A Registered Shares 239740 239740 D Deferred Units awarded on February 9, 2023, vested on February 5, 2026, upon satisfaction of the applicable performance measures pursuant to the Issuer's 2023-2025 performance cycle Shares sold upon vesting to satisfy tax withholding obligations. The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose. The Restricted Units were acquired on February 5, 2026, by the reporting person pursuant to the Issuer's long-term incentive plan. The restricted share units vest as follows: 79,913 on March 1, 2027; 79,913 on March 1, 2028; and 79,914 on March 1, 2029. /s/ Debra Kupferman by Power of Attorney 2026-02-09