Commitments and Contingencies	6 Months Ended
Jun. 30, 2025
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 10 — Commitments and Contingencies Tax Matters Audit claims of approximately $357.3 million at June 30, 2025, attributable to income and other business taxes remain outstanding and are under continued objection by Noble. Such audit claims are mostly attributable to Brazil. This remains under continued monitoring and evaluation on a quarterly basis as facts change and as audits and/or litigation continue to progress. We intend to vigorously defend our reported positions and currently believe the ultimate resolution of the audit claims will not have a material adverse effect on our consolidated financial statements. We operate in numerous countries throughout the world and our tax returns filed in those jurisdictions are subject to review and examination by tax authorities within those jurisdictions. We recognize uncertain tax positions that we believe have a greater than 50% likelihood of being sustained upon challenge by a tax authority. We cannot predict or provide assurance as to the ultimate outcome of any existing or future assessments. Hurricane Ida Personal Injury Claims As previously disclosed, in preparation for Hurricane Ida in the United States Gulf of America, also known as the United States Gulf of Mexico, in August 2021, the Noble Globetrotter II successfully secured the well it was drilling and detached from the blowout preventer without incident. However, during transit, the lower marine riser package and a number of riser joints separated from the rig, and certain other damage occurred. Due to the environmental conditions, a number of crew members were treated for injuries and released from medical care. We have had multiple parties, some of which are subject to a third-party contractual indemnity to our benefit, filed answers to the Limitation of Liability Action in the United States District Court Western District of Louisiana seeking damages related to physical and emotional harm allegedly suffered as a result of the Hurricane Ida incident. All parties have entered into settlement and release agreements with respect to the claims. We have insurance for such claims with a deductible of $5.0 million, in addition to contractual indemnity for a portion of the third-party claims. Timing differences existed between the funding of losses incurred and the receipt of insurance proceeds reflected in the Company’s financial statements. Services Agreement In February 2016, Diamond entered into a ten-year agreement with a subsidiary of Baker Hughes Company (formerly named Baker Hughes, a GE company) to provide services with respect to certain blowout preventer and related well control equipment on our drillships. Such services include management of maintenance, certification, and reliability with respect to such equipment. Future commitments under the contractual services agreements are estimated to be approximately $24.7 million annually. Total future commitments are projected to be $55.3 million in the aggregate over the remaining term of the agreement, including a maximum $37.0 million commitment for the purchase of consumables and capital spare parts owned and controlled by the vendor at the end of the service arrangement. Letters of Credit and Surety Bonds As of June 30, 2025, we had $18.2 million of letters of credit issued under the 2023 Revolving Credit Facility and an additional $140.4 million in letters of credit and surety bonds issued under bilateral arrangements which guarantee our performance as it relates to our drilling contracts, contract bidding, tax appeals, customs duties, and other obligations in various jurisdictions. We expect to comply with the underlying performance requirements and we expect obligations under these letters of credit and surety bonds will not be called. Other Contingencies We are a defendant in certain other claims and litigation arising out of operations in the ordinary course of business, including personal injury claims, the resolution of which, in the opinion of management, will not be material to our financial position, results of operations, or cash flows. There is inherent risk in any litigation or dispute and no assurance can be given as to the outcome of these claims.

Audit claims of approximately $357.3 million at June 30, 2025, attributable to income and other business taxes remain outstanding and are under continued objection by Noble. Such audit claims are mostly attributable to Brazil. This remains under continued monitoring and evaluation on a quarterly basis as facts change and as audits and/or litigation continue to progress. We intend to vigorously defend our reported positions and currently believe the ultimate resolution of the audit claims will not have a material adverse effect on our consolidated financial statements.

We operate in numerous countries throughout the world and our tax returns filed in those jurisdictions are subject to review and examination by tax authorities within those jurisdictions. We recognize uncertain tax positions that we believe have a greater than 50% likelihood of being sustained upon challenge by a tax authority. We cannot predict or provide assurance as to the ultimate outcome of any existing or future assessments.

As previously disclosed, in preparation for Hurricane Ida in the United States Gulf of America, also known as the United States Gulf of Mexico, in August 2021, the Noble Globetrotter II successfully secured the well it was drilling and detached

from the blowout preventer without incident. However, during transit, the lower marine riser package and a number of riser joints separated from the rig, and certain other damage occurred. Due to the environmental conditions, a number of crew members were treated for injuries and released from medical care. We have had multiple parties, some of which are subject to a third-party contractual indemnity to our benefit, filed answers to the Limitation of Liability Action in the United States District Court Western District of Louisiana seeking damages related to physical and emotional harm allegedly suffered as a result of the Hurricane Ida incident. All parties have entered into settlement and release agreements with respect to the claims. We have insurance for such claims with a deductible of $5.0 million, in addition to contractual indemnity for a portion of the third-party claims. Timing differences existed between the funding of losses incurred and the receipt of insurance proceeds reflected in the Company’s financial statements.

In February 2016, Diamond entered into a ten-year agreement with a subsidiary of Baker Hughes Company (formerly named Baker Hughes, a GE company) to provide services with respect to certain blowout preventer and related well control equipment on our drillships. Such services include management of maintenance, certification, and reliability with respect to such equipment. Future commitments under the contractual services agreements are estimated to be approximately $24.7 million annually. Total future commitments are projected to be $55.3 million in the aggregate over the remaining term of the agreement, including a maximum $37.0 million commitment for the purchase of consumables and capital spare parts owned and controlled by the vendor at the end of the service arrangement.

As of June 30, 2025, we had $18.2 million of letters of credit issued under the 2023 Revolving Credit Facility and an additional $140.4 million in letters of credit and surety bonds issued under bilateral arrangements which guarantee our performance as it relates to our drilling contracts, contract bidding, tax appeals, customs duties, and other obligations in various jurisdictions. We expect to comply with the underlying performance requirements and we expect obligations under these letters of credit and surety bonds will not be called.

We are a defendant in certain other claims and litigation arising out of operations in the ordinary course of business, including personal injury claims, the resolution of which, in the opinion of management, will not be material to our financial position, results of operations, or cash flows. There is inherent risk in any litigation or dispute and no assurance can be given as to the outcome of these claims.