# EDGAR Filing Document

**Accession Number:** 0001451505
**File Stem:** 0001451505-25-000087
**Filing Date:** 2025-8
**Character Count:** 5741
**Document Hash:** c505f37fd2f5a3e3d47c6ece8419983e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001451505-25-000087.hdr.sgml**: 20250819

**ACCESSION NUMBER**: 0001451505-25-000087

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 13

**CONFORMED PERIOD OF REPORT**: 20250819

**ITEM INFORMATION**: Unregistered Sales of Equity Securities

**ITEM INFORMATION**: Other Events

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20250819

**DATE AS OF CHANGE**: 20250819

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Transocean Ltd.
- **CENTRAL INDEX KEY:** 0001451505
- **STANDARD INDUSTRIAL CLASSIFICATION:** DRILLING OIL & GAS WELLS [1381]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 980599916
- **STATE OF INCORPORATION:** V8
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-38373
- **FILM NUMBER:** 251232077

**BUSINESS ADDRESS:**
- **STREET 1:** TURMSTRASSE 30
- **CITY:** STEINHAUSEN
- **STATE:** V8
- **ZIP:** 6312
- **BUSINESS PHONE:** 41 41 749 0500

**MAIL ADDRESS:**
- **STREET 1:** TURMSTRASSE 30
- **CITY:** STEINHAUSEN
- **STATE:** V8
- **ZIP:** 6312

?xml version='1.0' encoding='ASCII'? TRANSOCEAN LTD_August 19, 2025

**UNITED STATESSECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

### FORM 8-K
**CURRENT REPORTPursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (date of earliest event reported): August 19, 2025** 

## 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** |
| (Address of principal executive offices) | (zip code) |

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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))

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| | | |
|:---|:---|:---|
| &nbsp;&nbsp;Securities registered pursuant to Section 12(b) of the Act | &nbsp;&nbsp;Securities registered pursuant to Section 12(b) of the Act | &nbsp;&nbsp;Securities registered pursuant to Section 12(b) of the Act |
| &nbsp;&nbsp;Title of each class | &nbsp;&nbsp;Trading Symbol | &nbsp;&nbsp;Name of each exchange on which registered: |
| &nbsp;&nbsp;Shares, $0.10 par value | &nbsp;&nbsp;RIG | &nbsp;&nbsp;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 3.02** **Unregistered Sales of Equity Securities**

The information included under Item 8.01 is incorporated herein by reference.

**Item 8.01** **Other Events**

As previously announced, a subsidiary of Transocean Ltd. (the "Company") entered into separate, individually negotiated agreements on August 11, 2025 (the "Exchange Agreements") with certain holders (the "EB Holders") of its 4.0% Senior Guaranteed Exchangeable Bonds due 2025 (the "Exchangeable Bonds") as part of ongoing efforts to optimize the Company's capital structure. The transactions contemplated by the Exchange Agreements closed on August 19, 2025.

Under the terms of the Exchange Agreements, the EB Holders exchanged an aggregate principal amount of approximately $39.7 million of Exchangeable Bonds for an aggregate amount of approximately 13.9 million shares, $0.10 par value, of the Company ("Shares") and an aggregate cash payment of an immaterial amount for accrued and unpaid interest on the exchanged Exchangeable Bonds. Immediately following the closing of the transactions contemplated by the Exchange Agreements, approximately $37.3 million in aggregate principal amount of the Exchangeable Bonds remained outstanding.

The issuances of Shares described above are exempt pursuant to Section 4(a)(2) of the Securities Act of 1933, as amended, which exempts transactions by an issuer not involving a public offering.

**Item 9.01** **Financial Statements and Exhibits**

(d) Exhibits.

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| | |
|:---|:---|
| **Exhibit No**. | **Description** |
| 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.

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| | | |
|:---|:---|:---|
|  | TRANSOCEAN LTD. | TRANSOCEAN LTD. |
| Date: August 19, 2025 | By: | /s/ Daniel Ro-Trock |
|  |  | Daniel Ro-Trock |
|  |  | Authorized Person |

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