RIG: Financial results · Company disclosure

Item 2.02. Results of Operations and Financial Condition Transocean Ltd.’s press release dated November 2, 2026, concerning financial results for the third quarter 2026, furnished as Exhibit 99.1 to this report, is incorporated by reference herein. Item 7.01. Regulation FD Disclosure We issue a report entitled “Transocean Fleet Status Report,” which includes drilling rig status and contract information. A report dated November 2, 2026, is furnished as Exhibit 99.2 to this Current Report on Form 8-K and is incorporated herein by reference. You may subscribe to the Transocean “E-mail Alerts,” which based upon your selections will alert you to new Transocean press releases, financial and other updates. This free service will send you an automated email containing the Fleet Status Report press release and a link to our website: www.deepwater.com, where the reports are posted each quarter under “Investors/Fleet Status Report.” You may subscribe to this service in the footer of any of the website’s Investors pages by selecting “E-mail Alerts” then providing your email address. Please select the alerts to which you prefer to subscribe and click “Submit.” Item 9.01. Financial Statements and Exhibits (d) Exhibits ​ ​ ​ ​ Number Description 99.1 Press Release Reporting Third Quarter 2026 Financial Results 99.2 Fleet Status Report dated November 2, 2026 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) ​ ​ ​ SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized. ​ ​ ​ ​ ​ TRANSOCEAN LTD. ​ ​ ​ ​ ​ Date: No