Transocean Ltd.

Item 7.01. Regulation FD Disclosure Furnished as Exhibit 99.1 to this Current Report on Form 8-K are the Company's statutory consolidated financial statements, which comprise the consolidated balance sheets as of December 31, 2025 and 2024, and the related consolidated statements of operations, comprehensive loss, equity, and cash flows for each of the three years in the period ended December 31, 2025 and the related notes, which financial statements and report thereon is incorporated herein by reference. Furnished as Exhibit 99.2 to this Current Report on Form 8-K are the Company's statutory financial statements, which comprise the balance sheet as at December 31, 2025, the statement of operations for the year then ended and notes to the financial statements, which financial statements and report thereon is incorporated herein by reference. The information in this Current Report on Form 8-K is being "furnished"pursuant to Item 7.01 and shall not be deemed to be"filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, and is not incorporated by reference into any Company filing, whether made before or after the date hereof, regardless of any general incorporation language in such filing. Item 9.01. Financial Statements and Exhibits (d) Exhibits The exhibits to this report furnished pursuant to Item 9.01 are as follows: ​ ​

Number Description 99.1 Statutory consolidated financial statements of Transocean Ltd. and its subsidiaries, which comprise the consolidated balance sheets as of December 31, 2025 and 2024, and the related consolidated statements of operations, comprehensive loss, equity, and cash flows for each of the three years in the period ended December 31, 2025, together with the related notes 99.2 Statutory financial statements of Transocean Ltd., which comprise the balance sheet as at December 31, 2025, the statement of operations for the year then ended and notes to the financial statements 101 Interactive data files pursuant to Rule 405 of Regulation S-T formatted in Inline Extensible Business Reporting Language 104 Cover Page Interactive Data File (formatted as inline XBRL)