Form 8-K

8-K — Transocean Ltd.

Accession: 0001451505-26-000032

Filed: 2026-04-16

Period: 2026-04-16

CIK: 0001451505

SIC: 1381 (DRILLING OIL & GAS WELLS)

Item: Regulation FD Disclosure

Item: Financial Statements and Exhibits

Documents

8-K — rig-20260416x8k.htm (Primary)

EX-99.1 (rig-20260416xex99d1.htm)

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8-K

8-K (Primary)

Filename: rig-20260416x8k.htm · Sequence: 1

TRANSOCEAN LTD_ April 16, 2026

0001451505false00014515052026-04-162026-04-16

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of

the Securities Exchange Act of 1934

Date of report (date of earliest event reported): April 16, 2026

TRANSOCEAN LTD.

(Exact name of Registrant as specified in its charter)

Switzerland

001-38373

98-0599916

(State or other jurisdiction of

(Commission

(I.R.S. Employer

incorporation or organization)

File Number)

Identification No.)

Turmstrasse 30

Steinhausen, Switzerland

CH-6312

(Address of principal executive offices)

(zip code)

Registrant’s telephone number, including area code: +41 (41) 749-0500

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act

Title of each class

Trading Symbol

Name of each exchange on which registered:

Shares, $0.10 par value

RIG

New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 7.01Regulation FD Disclosure.

Transocean Ltd. (NYSE: RIG) (“Transocean”) today announced that the Deepwater Asgard was awarded a five-well contract in the Eastern Mediterranean Sea with an undisclosed operator. The estimated 390-day campaign is expected to commence in the fourth quarter of 2026 and contribute approximately $158 million in backlog, excluding additional services and compensation for mobilization and demobilization.

Inclusive of the recently announced fixtures on the Transocean Barents in Norway, and the Deepwater Orion, Deepwater Aquila, and Deepwater Corcovado in Brazil, total backlog additions approximate $1.6 billion since the beginning of April.

A copy of the press release announcing the fixtures 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 $158 Million Award for Ultra-Deepwater Drillship

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).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

TRANSOCEAN LTD.

Date: April 16, 2026

By:

/s/ Debra Kupferman

Debra Kupferman

Authorized Person

EX-99.1

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EXHIBIT 99.1

Transocean Ltd. Announces $158 Million Award for Ultra-Deepwater Drillship

STEINHAUSEN, Switzerland, April 16, 2026 — Transocean Ltd. (NYSE: RIG) (“Transocean”) today announced that the Deepwater Asgard was awarded a five-well contract in the Eastern Mediterranean Sea with an undisclosed operator. The estimated 390-day campaign is expected to commence in the fourth quarter of 2026 and contribute approximately $158 million in backlog, excluding additional services and compensation for mobilization and demobilization.

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 operates the highest specification floating offshore drilling fleet in the world.

Transocean owns or has partial ownership interests in and operates a fleet of 27 mobile offshore drilling units, consisting of 20 ultra-deepwater floaters and seven harsh environment floaters.

Forward-Looking Statements

The statements described herein 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 could contain words such as “approximately,” “expected,” “estimated,” 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 beyond our control, and in many cases, cannot be predicted. Should one or more of these risks or uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those indicated. Factors that could cause actual results to differ materially include, but are not limited to, the level of activity in offshore oil and gas exploration and development, exploration success by producers, operating hazards and delays, risks associated with international operations, actions by customers and other third parties, the fluctuation of current and future prices of oil and gas, the global and regional supply and demand for oil and gas, the intention to scrap certain drilling rigs, the effects of the spread of and mitigation efforts by governments, businesses and individuals related to contagious illnesses, and other factors, including our expectations regarding the timing, completion and anticipated benefits of the proposed business combination with Valaris Limited, an exempted company limited by shares incorporated under the laws of Bermuda, and other risks discussed in the company's most recent Annual Report on Form 10-K for the year ended December 31, 2025, and in the company's other filings with the SEC, which are available free of charge on the SEC's website at: www.sec.gov. All subsequent written and oral forward-looking statements attributable to us 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. We expressly disclaim any obligations or undertaking to release publicly any updates or revisions to any forward-looking statement to reflect any change in our expectations or beliefs with regard to the statement or any change in events, conditions or circumstances on which any forward-looking statement is based, except as required by law. All non-GAAP financial measure reconciliations to the most comparative GAAP measure are displayed in quantitative schedules on the company’s website at www.deepwater.com.

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 the Swiss Financial Services Act (“FinSA”) or advertising within the meaning of the FinSA. Nothing contained herein is, or shall be relied on as, a promise or representation as to the future performance of Transocean. Investors must rely on their own evaluation of Transocean and its securities, including the merits and risks involved, when making any investment decision involving Transocean securities.

Analyst Contact:

Sarah Davidson

+1 713-232-7217

Media Contact:

Kristina Mays

+1 713-232-7734

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