Transocean (NYSE: RIG) starts $500M senior priority notes sale

Rhea-AI Filing Summary

Transocean Ltd. is starting a new debt financing. The company announced that its subsidiary, Transocean International Limited, has begun an offering of $500 million aggregate principal amount of Senior Priority Guaranteed Notes due 2032.

The notes are being sold in a private placement to institutional investors, including qualified institutional buyers in the United States and certain investors outside the U.S. under Regulation S. This transaction is designed to raise long-term capital through bonds rather than issuing new shares.

Insights

Capital structure and credit analyst

Transocean plans a $500M private senior notes issue due 2032.

Transocean Ltd., through Transocean International Limited, has launched an offering of $500 million in Senior Priority Guaranteed Notes maturing in 2032. These are long-dated bonds marketed privately to qualified institutional buyers in the U.S. and to certain investors outside the U.S. under Regulation S, rather than through a public securities registration.

Senior priority guaranteed notes typically sit high in the capital structure and benefit from guarantees within the group, which can be attractive to credit investors compared with unsecured debt. For the issuer, this adds fixed obligations over a long period, so the ultimate effect on leverage, interest expense, and financial flexibility depends on how the proceeds are used and whether they refinance existing debt.

The announcement references a separate press release (Exhibit 99.1) for full terms. Subsequent disclosures about pricing, covenants, and any intended refinancing of outstanding obligations will clarify how this financing fits into Transocean's broader balance sheet strategy.

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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

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FORM 8-K

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CURRENT REPORT
Pursuant to Section 13 or 15(d) of
the Securities Exchange Act of 1934

Date of report (date of earliest event reported): September 30, 2025

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TRANSOCEAN LTD.

(Exact name of Registrant as specified in its charter)

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Switzerland		001-38373		98-0599916
(State or other jurisdiction of	​	(Commission	​	(I.R.S. Employer
incorporation or organization)	​	File Number)	​	Identification No.)

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Turmstrasse 30		​
Steinhausen, Switzerland	​	CH-6312
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(Address of principal executive offices)	​	(zip code)

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

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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)

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

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

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

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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).

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Emerging growth company ☐

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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. ☐

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Item 7.01Regulation FD Disclosure.

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Transocean Ltd. announced today the commencement of an offering by Transocean International Limited (the “Company”) of $500 million aggregate principal amount of Senior Priority Guaranteed Notes due 2032 in a private placement to persons reasonably believed to be qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended, and to non-U.S. persons outside the United States pursuant to Regulation S under the Securities Act.

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The foregoing description does not purport to be complete and is qualified in its entirety by the full text of the press release announcing the offering, a copy of which is attached hereto and incorporated by reference as Exhibit 99.1.

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Item 9.01  Financial Statements and Exhibits.

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(d)  Exhibits.

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Exhibit No.		Description
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99.1	​	Transocean Ltd. Announces Proposed Private Offering of Senior Priority Guaranteed Notes due 2032
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).

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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.
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Date: September 30, 2025	By:	/s/ Daniel Ro-Trock
​	​	Daniel Ro-Trock
​	​	Authorized Person

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FAQ

What did Transocean Ltd. (RIG) announce in this 8-K?

Transocean Ltd. announced that its subsidiary, Transocean International Limited, has commenced an offering of $500 million aggregate principal amount of Senior Priority Guaranteed Notes due 2032 in a private placement.

How large is the new notes offering by Transocean (RIG)?

The offering is for $500 million aggregate principal amount of Senior Priority Guaranteed Notes due 2032.

Who can buy the new Transocean 2032 senior priority guaranteed notes?

The notes are being offered in a private placement to qualified institutional buyers in the United States and to certain non-U.S. persons under Regulation S of the Securities Act.

Are Transocean's new $500 million notes publicly offered or privately placed?

They are privately placed Senior Priority Guaranteed Notes, offered to institutional and certain non-U.S. investors rather than through a public securities offering.

When do Transocean's new Senior Priority Guaranteed Notes mature?

The Senior Priority Guaranteed Notes that Transocean International Limited plans to issue will be due in 2032.

Where can investors find more details on Transocean's $500 million notes offering?

Further details are provided in a press release titled "Transocean Ltd. Announces Proposed Private Offering of Senior Priority Guaranteed Notes due 2032", attached as Exhibit 99.1.