Transocean Ltd. Provides Quarterly Fleet Status Report

1 Transocean Ltd. Provides Quarterly Fleet Status Report STEINHAUSEN, Switzerland February 19, 2018 Transocean Ltd. (NYSE: RIG) today issued a Quarterly Fleet Status Report that Provides the current Status of and contract information for the company's Fleet of offshore drilling rigs. On January 30, 2018, the company closed the acquisition of Songa Offshore SE. The transaction added seven semisubmersibles to the company's Fleet , including four high-specification, harsh environment CAT- D rigs under long-term contracts with Statoil. As of February 19, 2018, the combined company's contract backlog is $ billion. On February 12, 2018, the newbuild ultra-deepwater drillship Deepwater Poseidon commenced operations on its 10-year contract with Shell in the Gulf of Mexico. This Report also includes the following: Deepwater Asgard Awarded a three-well contract plus a one-well option in the Gulf of Mexico.

2 Deepwater Invictus Awarded a two-well contract extension in the Gulf of Mexico;. Discoverer India Awarded a five-well contract offshore the Ivory Coast;. Dhirubhai Deepwater KG2 Awarded a three-well contract plus five one-well options offshore Myanmar;. Dhirubhai Deepwater KG1 Awarded a six-well contract plus options offshore India;. Deepwater Nautilus Awarded a one-well contract plus three one-well options offshore Brunei;. Transocean Spitsbergen Awarded a 22-well contract plus one three-well option and two one- well options in the Norwegian North Sea;. Paul B. Loyd, Jr. Awarded a one-well contract in the North Sea;. Transocean Leader o Amendment, that replaces the previous contract scheduled to expire in May 2019, is comprised of 210 days commencing in July of 2018 in the North Sea; and o Awarded a 90-day contract plus a one-well option in the North Sea with another customer.

3 Transocean Arctic Awarded two contracts with different customers in the Norwegian North Sea as follows: o Three-well contract plus two one-well options; and o Four-well contract. The Report can be accessed on the company's website: About Transocean Transocean is a leading international provider of offshore contract drilling services for oil and gas wells. The company specializes in technically demanding sectors of the global offshore drilling business with a particular focus on ultra-deepwater and harsh environment drilling services, and believes that it operates one of the most versatile offshore drilling fleets in the world. Transocean owns or has partial ownership interests in, and operates a Fleet of 47 mobile offshore drilling units consisting of 27 ultra-deepwater floaters, 12 harsh environment floaters, two deepwater floaters and six midwater floaters.

4 In addition, Transocean has two ultra-deepwater drillships under construction or under contract to be constructed. The company also operates two high-specification jackups that were under drilling contracts when the rigs were sold, and the company continues to operate these jackups until completion or novation of the drilling contracts. Forward-Looking Statements The statements described in this press release that are not historical facts are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These statements contain words such as "possible," "intend,". "will," "if," "expect," or other similar expressions. Forward-looking statements are based on management's current expectations and assumptions, and are subject to inherent uncertainties, risks and changes in circumstances that are difficult to predict.

5 As a result, actual results could differ materially from those indicated in these forward-looking statements. Factors that could cause actual results to differ materially include, but are not limited to, estimated duration of customer contracts, contract dayrate amounts, future contract commencement dates and locations, planned shipyard projects and other out-of-service time, sales of drilling units, timing of the company's newbuild deliveries, operating hazards and delays, risks associated with international operations, actions by customers and other third parties, the future prices of oil and gas, the intention to scrap certain drilling rigs, the benefits, and other factors, including those and other risks discussed in the company's most recent Annual Report on Form 10-K for the year ended December 31, 2016, and in the company's other filings with the SEC.

6 Which are available free of charge on the SEC's website at: Should one or more of these risks or uncertainties materialize (or the other consequences of such a development worsen), or should underlying assumptions prove incorrect, actual results may vary materially from those indicated or expressed or implied by such forward-looking statements. All subsequent written and oral forward-looking statements attributable to the company or to persons acting on our behalf are expressly qualified in their entirety by reference to these risks and uncertainties. You should not place undue reliance on forward-looking statements. Each forward-looking statement speaks only as of the date of the particular statement, and we undertake no obligation to publicly update or revise any forward-looking statements to reflect events or circumstances that occur, or which we become aware of, after the date hereof, except as otherwise may be required by law.

7 All non-GAAP. financial measure reconciliations to the most comparative GAAP measure are displayed in quantitative schedules on the company's website at: This press release, or referenced documents, do not constitute an offer to sell, or a solicitation of an offer to buy, any securities, and do not constitute an offering prospectus within the meaning of article 652a or article 1156 of the Swiss Code of Obligations. Investors must rely on their own evaluation of Transocean and its securities, including the merits and risks involved. Nothing contained herein is, or shall be relied on as, a promise or representation as to the future performance of Transocean . Analyst Contacts: Bradley Alexander +1 713-232-7515. Diane Vento +1 713-232-8015. Media Contact: Pam Easton +1 713-232-7647. Transocean Ltd. (NYSE: RIG), (SIX: Updated: February 19, 2018.)

8 Revisions Noted in Bold Dynamically positioned . Dayrate on Dayrate on Yr. (1) Water Drilling Estimated Estimated Current Previous Footnote Floater Dynamically Entered Depth Depth Contract Expiration Contract (3) Contract (3). Rig Type/Name References Type Positioned Service (Feet) (Feet) Location Customer Start Date (2) Date (2) (Dollars) (Dollars) Additional Comments for Q1 2018 - Q4 2018. Rigs Under Construction (2). JSPL Ultra-Deepwater Drillship TBN 1 (9) ship TBA 12,000 40,000 TBA. JSPL Ultra-Deepwater Drillship TBN 2 (9) ship TBA 12,000 40,000 TBA. Ultra-Deepwater (27). Deepwater Poseidon (6) ship 2018 12,000 40,000 USGOM Shell Feb-18 Feb-28 519,000 N/A. Deepwater Pontus (6) ship 2017 12,000 40,000 USGOM Shell Oct-17 Oct-27 519,000 N/A. Deepwater Conqueror (6), (8) ship 2016 12,000 40,000 USGOM Chevron Dec-16 Dec-21 586,000 N/A.

9 Deepwater Proteus (6) ship 2016 12,000 40,000 USGOM Shell Aug-16 May-26 486,000 498,000. Deepwater Thalassa (6) ship 2016 12,000 40,000 USGOM Shell Jul-16 Feb-26 488,000 499,000. Deepwater Asgard (8) ship 2014 12,000 40,000 USGOM Murphy Oil Corp. Feb-18 Jun-18 Not Disclosed N/A. Deepwater Invictus (6) ship 2014 12,000 40,000 USGOM BHP Billiton Nov-17 Mar-18 Not Disclosed 592,000. (6) USGOM BHP Billiton Apr-18 Mar-20 Not Disclosed Not Disclosed Deepwater Champion ship 2011 12,000 40,000 Stacked Feb. 2016. Discoverer Inspiration (6), (8) ship 2010 12,000 40,000 USGOM Chevron Mar-15 Mar-20 571,000 523,000. Discoverer India (8) ship 2010 12,000 40,000 Ivory Coast CNR Apr-18 Nov-18 Not Disclosed N/A. Dhirubhai Deepwater KG2 ship 2010 12,000 35,000 Myanmar Woodside Energy Ltd. Apr-18 Sep-18 Not Disclosed N/A. Discoverer Luanda (12) ship 2010 7,500 40,000 Stacked February 2018.

10 Discoverer Americas ship 2009 12,000 40,000 Stacked April 2016. Discoverer Clear Leader ship 2009 12,000 40,000 Idle Nov 2017. Petrobras 10000 (6), (8), (16) ship 2009 12,000 37,500 USGOM Petrobras Sep-17 Jul-18 494,000 492,000. (6), (7), (8) Brazil Petrobras Aug-18 Aug-19 453,000 494,000. Dhirubhai Deepwater KG1 ship 2009 12,000 35,000 India Reliance Jul-18 Nov-19 Not Disclosed 433,000. Development Driller III semi 2009 7,500 37,500 Idle October 2017. GSF Development Driller II semi 2005 7,500 37,500 Stacked Jan. 2016. GSF Development Driller I semi 2005 7,500 37,500 Australia Quadrant Energy Apr-18 Sep-18 Not Disclosed N/A Reactivation costs estimated at $28 million, incurred primarily in Q4 2017. Discoverer Deep Seas ship 2001 10,000 35,000 Stacked Feb. 2016. Discoverer Spirit ship 2000 10,000 35,000 Stacked March 2015.