
| LEGAL DISCLAIMER Forward-Looking Statements The statements described in this presentation 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 "may," "will," "likely," "should," "expect," "anticipate," "future," "plan," "believe," "intend," "goal," "seek," "estimate," "project,” “continue” 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. 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 Transocean Ltd.’s (“Transocean”)’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 inability to complete the acquisition of Ocean Rig UDW Inc. (“Ocean Rig”) in a timely manner or at all (whether as the result of the inability to obtain or delay in obtaining any required Transocean or Ocean Rig shareholder approvals or any required regulatory approvals, or for any other reason); the imposition of any terms and conditions on any required governmental and regulatory approvals that could reduce the anticipated benefits to Transocean of the acquisition; the occurrence of any event, change or other circumstances that could give rise to the termination of the acquisition; the inability to successfully integrate Ocean Rig’s operations with those of Transocean without unexpected cost or delay, the challenges of integrating and retaining key employees; risks related to diversion of management time and attention from ongoing business operations due to the acquisition; the inability of Transocean to achieve expected synergies from the acquisition or that it may take longer or be more costly than expected to achieve those synergies; the effect of the announcement or completion of the acquisition on the ability of Transocean and Ocean Rig to retain customers, retain or hire key personnel, maintain relationships with their respective suppliers and customers, and on their operating results and businesses generally, the inability to achieve anticipated synergies from the merger in a timely manner or at all; and other factors, including those and other risks discussed in the Tranoscean's most recent Annual Report on Form 10-K for the year ended December 31, 2017, Ocean Rig’s most recent Annual Report on Form 20-F, and in the Transocean's or Ocean Rig’s other filings with the U.S. Securities and Exchange Commission (“SEC”), which are available free of charge on the SEC's website at: www.sec.gov. Should one or more of these risks or uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those indicated. All subsequent written and oral forward-looking statements attributable to the Transocean 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. Non-GAAP Financial Measures All non-GAAP financial measure reconciliations to the most comparative GAAP measure are displayed in quantitative schedules on the Transocean’s website at www.deepwater.com. Additional Information and Where to Find It This communication relates to the proposed merger pursuant to the terms of the Agreement and Plan of Merger, dated as of September 3, 2018, by and among Ocean Rig, Transocean, Transocean Oceanus Holdings Limited and Transocean Oceanus Limited]. In connection with the proposed merger, Transcoean expects to file a Registration Statement on Form S-4 with the SEC that will include a joint proxy statement of Transocean and Ocean Rig that also constitutes a prospectus of Transocean, which joint proxy statement/prospectus will be mailed or otherwise disseminated to Transocean and Ocean Rig shareholders when it becomes available. Transocean and Ocean Rig also plan to file other relevant documents with the SEC regarding the proposed merger. INVESTORS AND SECURITYHOLDERS ARE URGED TO READ THE JOINT PROXY STATEMENT/PROSPECTUS AND OTHER RELEVANT DOCUMENTS FILED WITH THE SEC IF AND WHEN THEY BECOME AVAILABLE IN THEIR ENTIRETY BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT THE MERGER. You may obtain a free copy of the joint proxy statement/prospectus (if and when it becomes available) and other relevant documents filed by Transocean and Ocean Rig with the SEC at the SEC’s website at www.sec.gov. Copies of the documents filed by Transocean with the SEC will be available free of charge on Transocean’s website at www.deepwater.com or by emailing Transocean’s Investor Relations at info@deepwater.com. Copies of the documents filed by Ocean Rig with the SEC will be available free of charge on Ocean Rig’s website at www.ocean-rig.com or by emailing Ocean Rig’s Investor Relations at oceanrig@capitallink.com. This communication does not constitute an offer to buy, or the solicitation of an offer to sell, any securities, nor shall there be any sale of securities in any jurisdiction in which such offer or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offering of securities shall be made except by means of a prospectus meeting the requirements of the U.S. Securities Act of 1933, as amended. This communication is not a substitute for any prospectus, proxy statement or any other document that Transocean or Ocean Rig may file with the SEC in connection with the proposed merger. Certain Information Regarding Participants in the Solicitation Transocean, Ocean Rig and their respective directors and executive officers and other members of management and employees may be deemed to be participants in the solicitation of proxies in respect of the proposed merger. Information regarding Transocean’s directors and executive officers is set forth in the definitive proxy statement on Schedule 14A filed by Transocean with the SEC on March 20, 2018 and in the Annual Report on Form 10-K filed by Transocean with the SEC on February 21, 2018. Additional information regarding the participants in the solicitation of proxies in respect of the Transocean and Ocean Rig extraordinary general meetings and a description of their direct and indirect interests, by security holdings or otherwise, will be included in the joint proxy statement/prospectus and other relevant documents filed with the SEC if and when they become available. You may obtain free copies of these documents from Transocean or Ocean Rig using the sources indicated above. 2 |