Company: RIG
Filing Date: 2025-09-26
Form Type: 424B5
Source: 0001451505-25-000102
Chunk: 53

Company: Transocean Ltd.
Filing Date: 2025-09-26
Form: 424B5
Chunk 53
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| d) | as specified in Section 276(7) of the SFA; or |

| e) | as specified in Regulation 32 of the Securities and Futures (Offers of Investments) (Shares and Debentures) Regulations 2005 of Singapore. |

In connection with Section 309B of the SFA and the Capital Markets Products (the “CMP”) Regulations 2018, the shares are prescribed capital markets products (as defined in the CMP Regulations 2018) and Excluded Investment Products (as defined in Monetary Authority of Singapore Notice SFA 04-N12: Notice on the Sale of Investment Products and Monetary Authority of Singapore Notice FAA-N16: Notice on Recommendations on Investment Products). Japan No registration pursuant to Article 4, paragraph 1 of the Financial Instruments and Exchange Law of Japan (Law No. 25 of 1948, as amended) (the “FIEL”) has been made or will be made with respect to the solicitation of the application for the acquisition of the shares. Accordingly, the shares have not been, directly or indirectly, offered or sold and will not be, directly or indirectly, offered or sold in Japan or to, or for the benefit of, any resident of Japan (which term as used herein means any person resident in Japan, including any corporation or other entity organized under the laws of Japan) or to others for re-offering or re-sale, directly or indirectly, in Japan or to, or for the benefit of, any resident of Japan except pursuant to an exemption from the registration requirements, and otherwise in compliance with, the FIEL and the other applicable laws and regulations of Japan.

S-32

#### Switzerland
This prospectus supplement and the accompanying base prospectus, which are part of a registration statement on Form S-3 (File No. 333-280617) that we filed with the SEC, constitute a foreign prospectus within the meaning of article 54 para. 2 and para. 3 of the Swiss Federal Financial Services Act of June 15, 2018, as amended (“FinSA”), and article 70 paras. 2 to 4 of the Swiss Federal Financial Services Ordinance of November 6, 2019, as amended, and have been deposited with the Prospectus Office of SIX Exchange Regulation AG. You may obtain copies of the full registration statement, of which the prospectus supplement and the accompanying base prospectus are part, in electronic form at the internet website maintained by the SEC at www.sec.gov