Transocean Ltd.

Item 7.01 Regulation FD Disclosure. ​ Transocean Ltd. (NYSE: RIG) ("Transocean") today announced a new contract award representing approximately $62 million in firm contract backlog and the formal approval of the previously announced Equinor agreement resulting in conversion of the $1.0 billion contract value to firm backlog. ​ The Transocean Norge was awarded a two-well contract with A/S Norske Shell. The estimated 120 days of work is expected to commence in direct continuation of the rig's previously awarded programs in Norway and contribute approximately $62 million in backlog, excluding additional services. The contract also includes one single-well option. ​ In late September, final approval was received from Equinor for the previously announced agreement for three harsh environment semisubmersible rigs in Norway: Transocean Enabler, Transocean Encourage , and Transocean Endurance . The total contract value of approximately $1.0 billion is now included in Transocean's backlog. ​ A copy of the press release announcing the fixture referred to above is attached hereto and incorporated herein by reference as Exhibit 99.1 . ​ Item 9.01 Financial Statements and Exhibits. ​ (d) Exhibits. ​ ​

Exhibit No . ​ ​ ​ Description ​ ​ ​ 99.1 ​ Transocean Ltd. Announces Contract Backlog of Approximately $1.1 Billion, Including Fully Approved Equinor Agreement 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).