{"url_path":"/sec/rig/8-k/2026-07-01/cover-page","section_key":"cover-page","section_title":"Cover Page","topic":"sec","document":{"doc_type":"8-K","doc_date":"2026-07-01","source_url":"https://www.sec.gov/Archives/edgar/data/1451505/0001104659-26-079622-index.html","accession_number":"0001104659-26-079622","cik":"0001451505","ticker":"RIG","issuer_name":"Transocean Ltd.","edgar_url":"https://www.sec.gov/Archives/edgar/data/1451505/0001104659-26-079622-index.html","primary_entity_key":"0001451505","primary_entity_name":"Transocean Ltd."},"word_count":296,"has_tables":true,"body_markdown":"false\n0001451505\n\n0001451505\n\n2026-06-29\n2026-06-29\n\niso4217:USD\n\nxbrli:shares\n\niso4217:USD\n\nxbrli:shares\n\n \n\n \n\n \n\n**UNITED STATES\nSECURITIES AND EXCHANGE COMMISSION**\n\n**WASHINGTON, D.C. 20549 **\n\n \n\n \n\n \n\n**FORM 8-K**\n\n \n\n \n\n \n\n**CURRENT REPORT\nPursuant to Section 13 or 15(d) of\nthe Securities and Exchange Act of 1934**\n\n \n\n **Date of Report (Date of earliest event\nreported): July 1, 2026 (June 29, 2026)**\n\n \n\n \n\n \n\n**TRANSOCEAN LTD.**\n\n**(Exact name of registrant as specified in its charter)**\n\n \n\n \n\n \n\n**Switzerland**\n \n**001-38373**\n \n**98-0599916**\n\n(State or other jurisdiction of\n \n(Commission\n \n(I.R.S. Employer\n\nincorporation or organization)\n \nFile Number)\n \nIdentification No.)\n\n \n\n**Turmstrasse 30**\n \n \n\n**Steinhausen, Switzerland**\n \n**CH-6312**\n\n(Address of principal executive offices)\n \n(zip code)\n\n \n\nRegistrant’s telephone number, including\narea code: **+41 (41) 749-0500**\n\n \n\n \n\n \n\nCheck the appropriate box below if the Form 8-K filing is intended\nto simultaneously satisfy the filing obligation of the registrant under any of the following provisions:\n\n \n\n¨Written communications pursuant to Rule 425 under the Securities\nAct (17 CFR 230.425)\n\n \n\nxSoliciting material pursuant to Rule 14a-12 under the Exchange\nAct (17 CFR 240.14a-12)\n\n \n\n¨Pre-commencement communications pursuant to Rule 14d-2(b) under\nthe Exchange Act (17 CFR 240.14d-2(b))\n\n \n\n¨Pre-commencement communications pursuant to Rule 13e-4(c) under\nthe Exchange Act (17 CFR 240.13e-4(c))\n\n \n\nSecurities registered pursuant to Section 12(b) of the Act:\n\n \n\n**Title of each class**\n \n**Ticker\nSymbol(s)**\n \n**Name of each exchange\non which registered**\n\nShares, $0.10 par value\n \nRIG\n \nNew York Stock Exchange\n\n \n\nIndicate by check mark whether the registrant is an emerging growth\ncompany as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities\nExchange Act of 1934 (§240.12b-2 of this chapter).\n\n \n\nEmerging Growth Company ¨\n\n \n\nIf an emerging growth company, indicate by check mark if the registrant\nhas elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant\nto Section 13(a) of the Exchange Act. ¨"}