Company: RIG
Filing Date: 2025-08-05
Form Type: S-8
Source: 0001558370-25-010332
Chunk: 1

Company: Transocean Ltd.
Filing Date: 2025-08-05
Form: S-8
Chunk 1
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 filed on June 3, 2025 |
|        |  5.1 |   | Opinion of Homburger AG                                                             |   | Filed herewith.                                                                                                     |
|        | 23.1 |   | Consent of Ernst & Young LLP                                                        |   | Filed herewith.                                                                                                     |
|        | 23.2 |   | Consent of Homburger AG                                                             |   | Included in Exhibit 5.1 hereto.                                                                                     |
|        | 24.1 |   | Power of Attorney                                                                   |   | Included as part of the signature page to this Registration Statement.​                                             |
| ​      |  107 | ​ | Filing Fee Table                                                                    | ​ | Filed herewith.                                                                                                     |

SIGNATURES Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in Steinhausen, Switzerland, on August 5, 2025. TRANSOCEAN LTD.

By: /s/ Keelan I. Adamson Name: Keelan I. Adamson Title: President and Chief Executive Officer POWER OF ATTORNEY Each person whose signature appears below constitutes and appoints Keelan I. Adamson, R. Thaddeus Vayda and Brady K. Long, and each of them, his or her true and lawful attorneys-in-fact and agents, with full power to act separately and full power of substitution and re-substitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments (including post-effective amendments) to this Registration Statement and all additional registration statements pursuant to Rule 462(b) of the Securities Act of 1933, and to file the same, with all exhibits thereto, and all other documents in connection therewith, with the Commission, granting unto each said attorney-in-fact and agent full power and authority to do and perform each and every act and thing requisite or necessary to be done in connection therewith, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or either of them, or his or her or their substitute or substitutes, may lawfully do or cause to