10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2024

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission file number 1-13926

DIAMOND OFFSHORE DRILLING, INC.

(Exact name of registrant as specified in its charter)

Delaware	76-0321760
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

777 N. Eldridge Parkway, Suite 1100

Houston, Texas

77079

(Address of principal executive offices)

(Zip Code)

(281) 492-5300

(Registrant’s telephone number, including area code)

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

Title of each class	Trading Symbol	Name of each exchange on which registered
Common Stock, $0.0001 par value per share	DO	New York Stock Exchange

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		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. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

Indicate by check mark whether the registrant has filed all documents and reports required to be filed by Sections 12, 13 or 15(d) of the Securities Exchange Act of 1934 subsequent to the distribution of securities under a plan confirmed by a court. Yes ☒ No ☐

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

As of May 6, 2024 Common stock, $0.0001 par value per share 102,481,240 shares.

DIAMOND OFFSHORE DRILLING, INC.

TABLE OF CONTENTS FOR FORM 10-Q

QUARTER ENDED MARCH 31, 2024

			PAGE NO.
COVER PAGE			1
TABLE OF CONTENTS			2
PART I. FINANCIAL INFORMATION			3
	ITEM 1.	Financial Statements (Unaudited)	3
		Condensed Consolidated Balance Sheets	3
		Condensed Consolidated Statements of Operations	4
		Condensed Consolidated Statements of Comprehensive Income	5
		Condensed Consolidated Statements of Stockholders’ Equity	6
		Condensed Consolidated Statements of Cash Flows	7
		Notes to Unaudited Condensed Consolidated Financial Statements	8
	ITEM 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	19
	ITEM 3.	Quantitative and Qualitative Disclosures About Market Risk	29
	ITEM 4.	Controls and Procedures	29
PART II. OTHER INFORMATION			31
	ITEM 1.	Legal Proceedings	31
	ITEM 1A.	Risk Factors	31
	ITEM 5.	Other Information	31
	ITEM 6.	Exhibits	32
SIGNATURES			33

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PART I. FINANCIAL INFORMATION

ITEM 1. Financial Statements.

DIAMOND OFFSHORE DRILLING, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

(In thousands, except par value amounts)

	March 31,			December 31,
	2024			2023
ASSETS
Current assets:
Cash and cash equivalents	$	162,409		$	124,457
Restricted cash		6,832			14,231
Accounts receivable		225,654			260,124
Less: allowance for credit losses		(5,731	)		(5,801	)
Accounts receivable, net		219,923			254,323
Prepaid expenses and other current assets		57,402			63,412
Asset held for sale		1,000			1,000
Total current assets		447,566			457,423
Drilling and other property and equipment, net of
accumulated depreciation		1,153,040			1,156,368
Other assets		89,488			98,762
Total assets	$	1,690,094		$	1,712,553
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	40,630		$	42,037
Accrued liabilities		185,132			203,336
Taxes payable		33,296			34,817
Current finance lease liabilities		16,286			15,960
Total current liabilities		275,344			296,150
Long-term debt		534,009			533,514
Noncurrent finance lease liabilities		108,537			113,201
Deferred tax liability		15,472			10,966
Other liabilities		97,421			113,871
Commitments and contingencies (Note 7)
Total liabilities		1,030,783			1,067,702
Stockholders’ equity:
Preferred stock (par value $0.0001, 50,000 shares authorized, none issued and outstanding at March 31, 2024 and December 31, 2023)		—			—
Common stock (par value $0.0001, 750,000 shares authorized; 103,399 shares issued and 102,479 shares outstanding at March 31, 2024 and 103,189 shares issued and 102,322 shares outstanding at December 31, 2023)		10			10
Additional paid-in capital		982,098			978,575
Treasury stock		(9,154	)		(8,493	)
Accumulated deficit		(313,649	)		(325,261	)
Accumulated other comprehensive income		6			20
Total stockholders’ equity		659,311			644,851
Total liabilities and stockholders’ equity	$	1,690,094		$	1,712,553

The accompanying notes are an integral part of the condensed consolidated financial statements.

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DIAMOND OFFSHORE DRILLING, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited)

(In thousands, except per share data)

	Three Months Ended March 31,
	2024			2023
Revenues:
Contract drilling	$	258,770		$	214,383
Revenues related to reimbursable expenses		15,840			17,638
Total revenues		274,610			232,021
Operating expenses:
Contract drilling, excluding depreciation		184,205			173,490
Reimbursable expenses		15,266			17,213
Depreciation		31,354			27,906
General and administrative		18,576			19,585
Loss (gain) on disposition of assets		3,396			(1,213	)
Total operating expenses		252,797			236,981
Operating income (loss)		21,813			(4,960	)
Other income (expense):
Interest income		1,774			7
Interest expense, net of amounts capitalized		(15,346	)		(12,040	)
Foreign currency transaction gain (loss)		231			(1,271	)
Other, net		(71	)		(152	)
Income (loss) before income tax benefit		8,401			(18,416	)
Income tax benefit		3,211			25,645
Net income	$	11,612		$	7,229
Earnings per share
Basic	$	0.11		$	0.07
Diluted	$	0.11		$	0.07
Weighted-average shares outstanding
Basic		102,440			101,331
Diluted		104,740			103,936

The accompanying notes are an integral part of the condensed consolidated financial statements.

4

DIAMOND OFFSHORE DRILLING, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

(In thousands)

	Three Months Ended March 31,
	2024			2023
Net income	$	11,612		$	7,229
Other comprehensive loss, net
Unrealized loss on marketable securities (net of tax of $1)		(14	)		—
Comprehensive income	$	11,598		$	7,229

The accompanying notes are an integral part of the condensed consolidated financial statements.

5

DIAMOND OFFSHORE DRILLING, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(Unaudited)

(In thousands)

	Three Months Ended March 31, 2024
										Accumulated
					Additional					Other								Total
	Common Stock				Paid-In		Accumulated			Comprehensive			Treasury Stock					Stockholders’
	Shares		Amount		Capital		Deficit			Income			Shares		Amount			Equity
January 1, 2024		102,322	$	10	$	978,575	$	(325,261	)	$	20			867	$	(8,493	)	$	644,851
Net income		—		—		—		11,612			—			—		—			11,612
Stock-based compensation, net of tax		157		—		3,523		—			—			53		(661	)		2,862
Unrealized loss on marketable securities		—		—		—		—			(14	)		—		—			(14	)
March 31, 2024		102,479	$	10	$	982,098	$	(313,649	)	$	6			920	$	(9,154	)	$	659,311

	Three Months Ended March 31, 2023
					Additional										Total
	Common Stock				Paid-In		Accumulated			Treasury Stock					Stockholders’
	Shares		Amount		Capital		Deficit			Shares		Amount			Equity
January 1, 2023		101,320	$	10	$	964,467	$	(280,555	)		564	$	(4,252	)	$	679,670
Net income		—		—		—		7,229			—		—			7,229
Stock-based compensation, net of tax		38		—		4,072		—			11		(134	)		3,938
March 31, 2023		101,358	$	10	$	968,539	$	(273,326	)		575	$	(4,386	)	$	690,837

The accompanying notes are an integral part of the condensed consolidated financial statements.

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DIAMOND OFFSHORE DRILLING, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

(In thousands)

	Three Months Ended March 31,
	2024			2023
Operating activities:
Net income	$	11,612		$	7,229
Adjustments to reconcile net income to net cash
provided by (used in) operating activities:
Depreciation		31,354			27,906
Loss (gain) on disposition of assets		3,396			(1,213	)
Deferred tax provision		(7,525	)		(14,457	)
Stock-based compensation expense		3,590			4,414
Contract liabilities, net		4,865			297
Contract assets, net		10			(270	)
Deferred contract costs, net		5,867			(2,560	)
Other assets, noncurrent		860			(400	)
Other liabilities, noncurrent		(874	)		1,883
Other		963			706
Changes in operating assets and liabilities:
Accounts receivable		34,400			(15,023	)
Prepaid expenses and other current assets		(128	)		(4,229	)
Accounts payable and accrued liabilities		(29,300	)		(7,796	)
Taxes payable		(72	)		(4,664	)
Net cash provided by (used in) operating activities		59,018			(8,177	)
Investing activities:
Capital expenditures		(27,935	)		(29,413	)
Proceeds from disposition of assets, net of disposal costs		3,805			663
Net cash used in investing activities		(24,130	)		(28,750	)
Financing activities:
Repayments under revolving credit facility		—			(15,000	)
Principal payments of finance leases		(4,335	)		(4,079	)
Net cash used in financing activities		(4,335	)		(19,079	)
Net change in cash, cash equivalents and restricted cash		30,553			(56,006	)
Cash, cash equivalents and restricted cash, beginning of period		138,688			97,334
Cash, cash equivalents and restricted cash, end of period	$	169,241		$	41,328

The accompanying notes are an integral part of the condensed consolidated financial statements.

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DIAMOND OFFSHORE DRILLING, INC.

AND SUBSIDIARIES

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

1. General Information

The unaudited condensed consolidated financial statements of Diamond Offshore Drilling, Inc. and subsidiaries, which we refer to as “Diamond Offshore,” “Company,” “we,” “us” or “our,” should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2023.

Interim Financial Information

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with United States generally accepted accounting principles (or GAAP) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X of the Securities and Exchange Commission. Accordingly, pursuant to such rules and regulations, they do not include all disclosures required by GAAP for annual financial statements. The condensed consolidated financial information has not been audited but, in the opinion of management, includes all adjustments (consisting of normal recurring adjustments) necessary for a fair presentation of Diamond Offshore’s condensed consolidated balance sheets, statements of operations, statements of comprehensive income, statements of stockholders’ equity and statements of cash flows at the dates and for the periods indicated. Results of operations for interim periods are not necessarily indicative of results of operations for the respective full years.

Use of Estimates in the Preparation of Financial Statements

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amount of revenues and expenses during the reporting period. Actual results could differ from those estimated.

Restricted Cash

We maintain a restricted cash bank account which is subject to restrictions pursuant to a management services agreement with an offshore drilling company. See Note 2 “Revenue from Contracts with Customers.”

We classify such restricted cash accounts in current assets if the restrictions are expected to expire or otherwise be resolved within one year or if such funds are considered to offset current liabilities. At March 31, 2024 and December 31, 2023, our restricted cash was considered to be current and was recorded in “Restricted cash” in our unaudited Condensed Consolidated Balance Sheets.

Asset Held for Sale

We reported the $1.0 million carrying value of the Ocean Monarch as “Asset held for sale” in our unaudited Condensed Consolidated Balance Sheets at March 31, 2024. The rig was sold in April 2024 for aggregate proceeds of approximately $7.5 million.

Accounting Principles Not Yet Adopted

In December 2023, the Financial Accounting Standards Board (or FASB) issued Accounting Standards Update (or ASU) No. 2023-09, Income Tax (Topic 740): Improvements to Income Tax Disclosures (or ASU 2023-09). ASU 2023-09 requires business entities on an annual basis to (i) disclose specific categories in the rate reconciliation and (ii) provide additional information for reconciling items that meet certain quantitative thresholds. The new guidance is effective for public business entities for annual periods beginning after December 15, 2024. Early adoption is permitted. We are in the process of evaluating the impact of adopting this new guidance on our consolidated financial statement disclosures.

In November 2023, the FASB issued ASU No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures (or ASU 2023-07). ASU 2023-07 modifies the disclosure and presentation requirements of reportable segments and requires the disclosure of significant segment expenses that are regularly

8

provided to the chief operating decision maker and included within each reported measure of segment profit and loss. In addition, the new guidance enhances interim disclosure requirements, clarifies circumstances in which an entity can disclose multiple segment measures of profit or loss, provides new segment disclosure requirements for entities with a single reportable segment, and contains other disclosure requirements. ASU 2023-07 is effective for annual periods beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. We are in the process of evaluating the impact of adopting this new guidance on our consolidated financial statement disclosures.

2. Revenue from Contracts with Customers

Our contracts with customers provide for an offshore drilling rig and drilling services on a dayrate contract basis. The integrated services provided under our contracts primarily include (i) provision of an offshore drilling rig, the work crew and supplies of equipment and services necessary to operate the rig, (ii) mobilization and demobilization of the rig to and from the drill site and (iii) performance of rig preparation activities and/or modifications required for each contract.

We account for the integrated services provided within our drilling contracts as a single performance obligation satisfied over time, comprised of a series of distinct time increments in which we provide drilling services. The total transaction price is recognized for each drilling contract by estimating both fixed and variable consideration expected to be earned over the contract term.

Revenues Related to Managed Rigs

In 2021, we entered into an arrangement with an offshore drilling company whereby we would provide management and marketing services (or the MMSA) for certain of their rigs. The MMSA provided for (i) a daily fixed fee, based on status of the drilling rig, (ii) marketing fees based on a percentage of the earned dayrate of a drilling contract secured by us on behalf of the rig owner, (iii) a variable management fee and (iv) reimbursement of direct cost incurred. The fixed and variable fees were recognized in “Contract drilling” revenue in our unaudited Condensed Consolidated Statements of Operations. Revenue related to the reimbursement of expenses incurred and billed to the rig owner were recorded as “Revenues related to reimbursable expenses” in our unaudited Condensed Consolidated Statements of Operations.

We may enter into certain drilling contracts directly with a customer. We are considered principal or agent of these transactions and recognize revenue under the terms of the contract. Such amounts are reported as “Contract drilling” revenue in our unaudited Condensed Consolidated Statements of Operations. In addition, we charter the related drilling rig from the rig owner to satisfy our performance obligation under the contract. We have determined that the arrangement to charter the rig is an operating lease, and the related charter fee has been reported as lease expense within "Contract drilling, excluding depreciation" in our unaudited Condensed Consolidated Statements of Operations.

The marketing arrangements for each of the managed rigs, the West Auriga and the West Vela, were terminated in 2023. Additionally, the management and charter agreements for the West Auriga were terminated in the first quarter of 2024, and the rig was returned to its owner at the end of February 2024. We also received notice of termination of the management agreement for the West Vela in April 2024, which will become effective after 90 days. The termination of the management agreement will have no effect on the bareboat charter agreement for the West Vela, which provides that it will continue in accordance with its terms until the completion of the rig’s existing drilling contract and any option periods.

Contract Balances

The following table provides information about receivables, contract assets and contract liabilities related to our contracts with customers (in thousands):

	March 31,			December 31,
	2024			2023
Trade receivables	$	206,830		$	253,367
Current contract assets (1)		2,565			2,575
Current contract liabilities (deferred revenue) (1)		(17,833	)		(12,634	)
Noncurrent contract liabilities (deferred revenue) (1)		(3,613	)		(3,947	)

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(1)Contract assets and contract liabilities may reflect balances which have been netted together on a contract basis. Net current contract asset and liability balances are included in “Prepaid expenses and other current assets” and “Accrued liabilities,” respectively, and net noncurrent contract liability balances are included in “Other liabilities” in our unaudited Condensed Consolidated Balance Sheets.

Changes in the contract assets and the contract liabilities balances during the period are as follows (in thousands):

	Contract			Contract
	Assets			Liabilities
Balance as of January 1, 2024	$	2,575		$	(16,581	)
Decrease due to amortization of revenue included in the beginning contract liability balance		—			3,185
Increase due to cash received, excluding amounts recognized as revenue during the period		—			(8,050	)
Increase due to revenue recognized during the period but contingent on future performance		391			—
Decrease due to transfer to receivables during the period		(323	)		—
Adjustments		(78	)		—
Balance as of March 31, 2024	$	2,565		$	(21,446	)

Transaction Price Allocated to Remaining Performance Obligations

The following table reflects revenue expected to be recognized in the future related to unsatisfied performance obligations as of March 31, 2024 (in thousands):

	For the Year Ending December 31,
	2024 (1)			2025			2026			2027			Total
Mobilization and contract preparation revenue	$	(4,317	)	$	(1,365	)	$	(1,337	)	$	(1,271	)	$	(8,290	)
Capital modification revenue		(2,954	)		(142	)		—			—			(3,096	)
Blended rate/other revenue		(10,060	)		—			—			—			(10,060	)
Total	$	(17,331	)	$	(1,507	)	$	(1,337	)	$	(1,271	)	$	(21,446	)

(1)Represents the nine-month period beginning April 1, 2024.

The revenue included above consists of expected fixed mobilization and upgrade revenue for both wholly and partially unsatisfied performance obligations, as well as expected variable mobilization and upgrade revenue for partially unsatisfied performance obligations, which has been estimated for purposes of allocating across the entire corresponding performance obligations. The actual timing of recognition of such amounts may vary due to factors outside of our control. We have applied the disclosure practical expedient in FASB ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), and its related amendments and have excluded estimated variable consideration related to wholly unsatisfied performance obligations or to distinct future time increments within our contracts, including dayrate revenue.

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3. Supplemental Financial Information

Unaudited Condensed Consolidated Balance Sheets Information

Accounts receivable, net of allowance for credit losses, consist of the following (in thousands):

	March 31,			December 31,
	2024			2023
Trade receivables	$	206,830		$	253,367
Insurance claim receivable (1)		11,688			—
Value added tax receivables		6,167			5,256
Related party receivables		75			155
Other		894			1,346
		225,654			260,124
Allowance for credit losses (2)		(5,731	)		(5,801	)
Total	$	219,923		$	254,323

(1)See Note 8 “Ocean GreatWhite Insurance Claim” for a discussion of an insurance claim associated with an equipment incident on one of our rigs.

(2)The allowance for credit losses at March 31, 2024 and December 31, 2023 represents our estimate of credit losses associated with our “Trade receivables” and “Current contract assets.” See Note 4 “Financial Instruments and Fair Value Disclosures” for a discussion of our concentrations of credit risk and allowance for credit losses.

Prepaid expenses and other current assets consist of the following (in thousands):

	March 31,		December 31,
	2024		2023
Deferred contract costs	$	15,211	$	20,552
Collateral deposit		11,857		11,857
Prepaid taxes		7,526		10,868
Rig spare parts and supplies		6,981		4,694
Current contract assets		2,565		2,575
Prepaid insurance		2,117		3,437
Prepaid rig costs		1,978		3,668
Software maintenance agreements and subscriptions		1,650		1,408
Deferred survey costs		1,386		1,418
Other		6,131		2,935
Total	$	57,402	$	63,412

Accrued liabilities consist of the following (in thousands):

	March 31,		December 31,
	2024		2023
Rig operating costs	$	47,316	$	42,893
Contract advances		33,225		63,618
Payroll and benefits		26,260		35,215
Interest payable		24,691		13,013
Deferred revenue		17,833		12,634
Personal injury and other claims		6,217		7,391
Current operating lease liability		8,171		8,436
Accrued capital project/upgrade costs		8,059		10,766
Deposit for equipment sale		5,902		1,977
Shorebase and administrative costs		4,967		5,699
Other		2,491		1,694
Total	$	185,132	$	203,336

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Unaudited Condensed Consolidated Statements of Cash Flows Information

Noncash operating, investing and financing activities excluded from the unaudited Condensed Consolidated Statements of Cash Flows and other supplemental cash flow information are as follows (in thousands):

	Three Months Ended March 31,
	2024		2023
Accrued but unpaid capital expenditures at period end	$	8,059	$	11,697
Common stock withheld for payroll tax obligations (1)		661		134
Cash interest payments		—		7,488
Cash income taxes paid, net of (refunds):
Foreign		1,851		1,258
U.S. Federal		130		(8,966	)

(1)Represents the cost of 302,833 and 10,946 shares of common stock withheld to satisfy payroll tax obligations incurred as a result of the vesting of restricted stock and restricted stock units during the three-month periods ended March 31, 2024 and March 31, 2023, respectively, which is presented as a deduction from stockholders’ equity in “Treasury stock” in our unaudited Condensed Consolidated Balance Sheets.

4. Financial Instruments and Fair Value Disclosures

Concentrations of Credit Risk and Allowance for Credit Losses

Our credit risk arises primarily from trade receivables. The market for our services is the offshore oil and gas industry, and our customer base consists primarily of major and independent oil and gas companies, as well as government-owned oil companies. At March 31, 2024, we believed that we had potentially significant concentrations of credit risk due to the number of rigs we had contracted and our limited number of customers, as some of our customers have contracted for multiple rigs.

In general, before working for a customer with whom we have not had a prior business relationship and/or whose financial stability may be uncertain, we perform a credit review on that customer, including a review of its credit ratings and financial statements. Based on our credit review, we may require that the customer have a bank issue a letter of credit on its behalf, prepay for the services in advance or provide other credit enhancements. We currently have one customer for which prepayments are required and full payment is due prior to commencement of the contract in the second half of 2024. At March 31, 2024, no amounts were owed by this customer.

Pursuant to FASB ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments and its related amendments (or ASU 2016-13), we have reviewed our historical credit loss experience over a look-back period of ten years, which we deem to be representative of both up-turns and down-cycles in the offshore drilling industry. Based on this review, we developed a credit loss factor using a weighted-average ratio of our actual credit losses to revenues during the look-back period. We also considered current and future anticipated economic conditions in determining our credit loss factor, including crude oil prices and liquidity of credit markets. In applying the requirements of ASU 2016-13 and its related amendments (or collectively, CECL), we determined that it would be appropriate to segregate our trade receivables into three credit loss risk pools based on customer credit ratings, each of which represents a tier of increasing credit risk. We calculated a credit loss factor based on historical loss rate information and applied a multiple of our credit loss factor to each of these risk pools, considering the impact of current and future economic information and the level of risk associated with these pools, to calculate our current estimate of credit losses. Trade receivables that are fully covered by allowances for credit losses are excluded from these risk pools for purposes of calculating our current estimate of credit losses.

At March 31, 2024, $8.5 million in trade receivables were considered past due by 30 days or more, of which $5.4 million have been fully reserved. The remaining $3.1 million were less than a year past due and considered collectible. For purposes of calculating our current estimate of credit losses at March 31, 2024 and December 31, 2023, all trade receivables, except for those fully reserved, were deemed to be in a single risk pool based on their credit ratings at each respective period. Our total allowance for credit losses was $5.7 million and $5.8 million at March 31, 2024 and December 31, 2023, respectively, including $0.3 million for each period related to our current estimate of credit losses

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under CECL. See Note 3 “Supplemental Financial Information — Unaudited Condensed Consolidated Balance Sheets Information.”

Fair Values

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The fair value hierarchy prescribed by GAAP requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value.

There are three levels of inputs that may be used to measure fair value:

Level 1	Quoted prices for identical instruments in active markets.
Level 2	Quoted market prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets.
Level 3	Valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable. Level 3 assets and liabilities generally include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation or for which there is a lack of transparency as to the inputs used.

Certain of our assets and liabilities are required to be measured at fair value on a recurring basis in accordance with GAAP. In addition, certain assets and liabilities may be recorded at fair value on a nonrecurring basis. Generally, we record assets at fair value on a nonrecurring basis as a result of impairment charges.

Assets and liabilities measured at fair value are summarized below (in thousands).

	March 31, 2024
	Fair Value Measurements Using
	Level 1			Level 2		Level 3		Assets (Liabilities) at Fair Value			Total Losses for Three Months Ended (2)
Recurring fair value measurements:
Short-term investments (1)	$	63,880		$	—	$	—	$	63,880		$	—
Liability-classified Director restricted stock units (2)	$	(1,326	)	$	—	$	—	$	(1,326	)	$	(62	)

	December 31, 2023
	Fair Value Measurements Using
	Level 1			Level 2		Level 3		Assets (Liabilities) at Fair Value			Total Losses for Year Ended (2)
Recurring fair value measurements:
Short-term investments (1)	$	92,308		$	—	$	—	$	92,308		$	—
Liability-classified Director restricted stock units (2)	$	(1,258	)	$	—	$	—	$	(1,258	)	$	(252	)

(1)Represents short-term investments, with original maturities of three months or less, in debt securities classified as available for sale.

(2)The fair value of restricted stock units was estimated based on the quoted market price of our common stock at the respective balance sheet date. The total loss for the period or year includes an increase in stock

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compensation expense due to the “marking-to-market” of liability-classified restricted stock units granted to our non-employee directors on a recurring basis.

We believe that the carrying amounts of our other financial assets and liabilities (excluding our long-term debt), which are not measured at fair value in our unaudited Condensed Consolidated Balance Sheets, approximate fair value based on the following assumptions:

•Cash and cash equivalents and restricted cash – The carrying amounts approximate fair value because of the short maturity of these instruments.

•Accounts receivable and accounts payable – The carrying amounts approximate fair value based on the nature of the instruments.

Our long-term debt is not measured at fair value on a recurring basis; however, under the GAAP fair value hierarchy, such indebtedness would be considered Level 2 liabilities. The fair value of the instrument was derived using valuation specialists at March 31, 2024 and December 31, 2023.

Fair values and related carrying values of our Second Lien Notes (as defined below in Note 6 “Long-Term Debt”) are shown below (in millions).

	March 31, 2024				December 31, 2023
	Fair Value		Carrying Value		Fair Value		Carrying Value
Second Lien Notes	$	580.7	$	550.0	$	562.6	$	550.0

We have estimated the fair value amounts by using appropriate valuation methodologies and information available to management. Certain inputs and value drivers are observed and obtained in active markets from similar assets or liabilities while developing these estimates, and accordingly, no assurance can be given that the estimated values are indicative of the amounts that would be realized in a free market exchange.

5. Drilling and Other Property and Equipment

Cost and accumulated depreciation of drilling and other property and equipment are summarized as follows (in thousands):

	March 31,			December 31,
	2024			2023
Drilling rigs and equipment	$	1,272,564		$	1,244,798
Finance lease right of use asset		174,571			174,571
Land and buildings		10,064			10,040
Office equipment and other		5,317			5,180
Cost		1,462,516			1,434,589
Less: accumulated depreciation		(309,476	)		(278,221	)
Drilling and other property and equipment, net	$	1,153,040		$	1,156,368

6. Long-Term Debt

At March 31, 2024 and December 31, 2023, the carrying value of our long-term debt, net of unamortized discount, premium and debt issuance costs, was comprised as follows (in thousands):

	March 31,		December 31,
	2024		2023
$550 Million Senior Secured Second Lien Notes due 2030	$	534,009	$	533,514

Second Lien Notes

On September 21, 2023, Diamond Foreign Asset Company and Diamond Finance, LLC (collectively referred to as the Issuers) issued $550.0 million aggregate principal amount of 8.5% Senior Secured Second Lien Notes due October 2030 (or the Second Lien Notes) with interest payable semi-annually in arrears on April 1 and October 1 of

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each year, beginning on April 1, 2024. The Second Lien Notes are fully and unconditionally guaranteed, jointly and severally, on a senior secured basis by Diamond Offshore Drilling, Inc. (or DODI) and each of its existing restricted subsidiaries (other than the Issuers) and by certain of DODI’s future restricted subsidiaries (other than the Issuers).

The Second Lien Notes obligate DODI and its specified subsidiaries to comply with an indenture dated as of September 21, 2023 (or the Indenture) entered into by the Issuers, DODI and certain of its subsidiaries named therein and HSBC Bank USA, National Association. The Indenture contains covenants that, among other things, restrict DODI’s ability and the ability of certain of its subsidiaries to: (i) incur additional debt and issue certain preferred stock; (ii) incur or create liens; (iii) make certain dividends, distributions, investments and other restricted payments; (iv) sell or otherwise dispose of certain assets; (v) engage in certain transactions with affiliates; and (vi) merge, consolidate, amalgamate or sell, transfer, lease or otherwise dispose of all or substantially all of DODI’s assets. These covenants are subject to important exceptions and qualifications.

The Second Lien Notes were valued at par at issuance and were presented net of unamortized debt issuance costs of $16.0 million and $16.5 million, at March 31, 2024 and December 31, 2023, respectively. At March 31, 2024, the effective interest rate on the Second Lien Notes was 9.10%.

Revolving Credit Agreement

Our revolving credit agreement provides for a $300.0 million senior secured revolving credit facility (or RCF), which will mature on April 22, 2026. Borrowings under the RCF may be used to finance capital expenditures, pay fees, commissions and expenses in connection with the loan transactions, and for working capital and other general corporate purposes. Availability of borrowings under the RCF is subject to the satisfaction of certain conditions, including restrictions on borrowings if, after giving effect to any such borrowings and the application of the proceeds thereof, (i) the aggregate amount of Available Cash (as defined in the RCF) would exceed $125.0 million, (ii) the RCF Collateral Coverage Ratio (as defined in the RCF) would be less than 2.00 to 1.00 or (iii) the Total Collateral Coverage Ratio (as defined in the RCF) would be less than 1.30 to 1.00.

At March 31, 2024 and May 6, 2024, we had no borrowings outstanding under the RCF and had utilized $1.9 million of available borrowing capacity for the issuance of a letter of credit. The outstanding letter of credit will expire on maturity in May 2024, unless replaced. As of May 6, 2024, approximately $298.1 million was available for borrowings under the RCF subject to its terms and conditions.

There is no capacity for the issuance of new letters of credit under the RCF, but the RCF permits us to obtain up to $50.0 million in letters of credit outside the RCF. We have obtained a separate $25.0 million letter of credit facility; however, letters of credit thereunder must be cash collateralized.

At March 31, 2024, we were in compliance with all covenants under the Second Lien Notes and the RCF.

7. Commitments and Contingencies

Various claims have been filed against us in the ordinary course of business, including claims by offshore workers alleging personal injuries. With respect to each claim or exposure, we have made an assessment, in accordance with GAAP, of the probability that the resolution of the matter would ultimately result in a loss. When we determine that an unfavorable resolution of a matter is probable and such amount of loss can be determined, we record a liability for the amount of the estimated loss at the time that both of these criteria are met. Our management believes that we have recorded adequate accruals for any liabilities that may reasonably be expected to result from these claims.

Non-Income Tax and Related Claims. We have received assessments related to, or otherwise have exposure to, non-income tax items such as sales-and-use tax, value-added tax, ad valorem tax, custom duties, and other similar taxes in various taxing jurisdictions. We have determined that we have a probable loss for certain of these taxes and the related penalties and interest and, accordingly, have recorded a $12.4 million and $12.7 million liability at March 31, 2024 and December 31, 2023, respectively, in “Other liabilities” in our unaudited Condensed Consolidated Balance Sheets. We intend to defend these matters vigorously; however, the ultimate outcome of these assessments and exposures could result in additional taxes, interest and penalties for which the fully assessed amounts would have a material adverse effect on our financial condition, results of operations and cash flows.

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Other Litigation. We have been named in various other claims, lawsuits or threatened actions that are incidental to the ordinary course of our business. We intend to defend these matters vigorously; however, litigation is inherently unpredictable, and the ultimate outcome or effect of any claim, lawsuit or action cannot be predicted with certainty. As a result, there can be no assurance as to the ultimate outcome of any litigation matter. Any claims against us, whether meritorious or not, could cause us to incur significant costs and expenses and require significant amounts of management and operational time and resources. In the opinion of our management, no such pending or known threatened claims, actions or proceedings against us are expected to have a material adverse effect on our consolidated financial position, results of operations or cash flows.

Personal Injury Claims. Under our current insurance policies, which renewed effective May 1, 2024, we generally self-insure $1.0 million to $2.5 million per occurrence, depending on jurisdiction, with respect to personal injury claims not related to named windstorms in the U.S. Gulf of Mexico, which primarily result from Jones Act liability in the U.S. Gulf of Mexico. Depending on the nature, severity, and frequency of claims that might arise during the policy year, if the aggregate level of claims exceed certain thresholds, we may self-insure up to $100.0 million for each subsequent occurrence.

The Jones Act is a federal law that permits seamen to seek compensation for certain injuries during the course of their employment on a vessel and governs the liability of vessel operators and marine employers for the work-related injury or death of an employee. We engage outside consultants to assist us in estimating our aggregate liability for personal injury claims based on our historical losses and utilizing various actuarial models. We allocate a portion of the aggregate liability to “Accrued liabilities” based on an estimate of claims expected to be paid within the next twelve months with the residual recorded as “Other liabilities.” At March 31, 2024, our estimated liability for personal injury claims was $11.8 million, of which $6.2 million and $5.6 million were recorded in “Accrued liabilities” and “Other liabilities,” respectively, in our unaudited Condensed Consolidated Balance Sheets. At December 31, 2023, our estimated liability for personal injury claims was $14.6 million, of which $7.4 million and $7.2 million were recorded in “Accrued liabilities” and “Other liabilities,” respectively, in our unaudited Condensed Consolidated Balance Sheets. The eventual settlement or adjudication of these claims could differ materially from our estimated amounts due to uncertainties such as:

•the severity of personal injuries claimed;

•significant changes in the volume of personal injury claims;

•the unpredictability of legal jurisdictions where the claims will ultimately be litigated;

•inconsistent court decisions; and

•the risks and lack of predictability inherent in personal injury litigation.

Purchase Obligations. At March 31, 2024, we had no purchase obligations for major rig upgrades or any other significant obligations, except for those related to our direct rig operations, which arise during the normal course of business.

Services Agreement. In February 2016, we 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 (or 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 $25.6 million annually. Total future commitments are projected to be $88.1 million in the aggregate over the remaining term of the agreement, including a $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.

In addition, we lease Well Control Equipment for our drillships under ten-year finance leases that commenced in 2016 that also include an option to purchase the leased equipment at the end of the respective lease term.

Letters of Credit and Other. As of March 31, 2024, an aggregate of $14.0 million in bonds and letters of credit had been issued on our behalf in connection with certain customs, tax assessment and tenant security deposit requirements. Of this amount, approximately $12.1 million had been cash collateralized as of March 31, 2024. An additional $1.9 million was collateralized by a letter of credit issued under our RCF, which cannot require additional collateral except in events of default, or until its maturity in May 2024, if not replaced.

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8. Ocean GreatWhite Insurance Claim

On February 1, 2024, the Ocean GreatWhite reported an equipment incident while located in the North Sea west of the Shetland Islands. The rig’s lower marine riser package (or LMRP) and deployed riser string unintentionally separated from the rig at the slip joint tensioner ring, and the LMRP and riser dropped to the seabed. Since the incident, we have been working closely with our customer and local authorities in response and have pursued efforts to recover the equipment and replace missing or damaged equipment. We have safely recovered the LMRP from the seabed and are in a repair facility in Kishorn port, where repairs to the LMRP and any related work are underway.

As of the date of this report, $19.1 million of incremental recovery and repair and maintenance costs have been incurred, as well as $2.6 million in capital expenditures. At March 31, 2024, we had retired assets with an aggregate net book value of $3.3 million. We anticipate that the repairs and equipment replacement will be covered by our hull and machinery insurance policy and that all incremental costs, less our $10.0 million deductible, will be reimbursable under that policy. At March 31, 2024, we had recorded an insurance receivable in the amount of $11.7 million for the aggregate expenditures, less the deductible, as of that date. However, we cannot fully predict the extent of such insurance coverage or the timing of such claims. We had not received any proceeds from insurance as of March 31, 2024. In addition, we will be required to pay an additional loss premium of up to 3.5% of net insurance proceeds received, payable after the claim is closed and all proceeds known.

9. Earnings Per Share

We compute basic earnings per share by dividing net income available to holders of our common stock by the weighted-average number of shares of our common stock outstanding during the period. Diluted earnings per share reflects the potential dilution that could occur if securities or other contracts to issue our common stock (common stock equivalents) were exercised or converted into common stock. Basic and diluted earnings per share (or EPS) was calculated in accordance with the treasury stock method, and includes all potentially dilutive stock equivalents, including warrants, restricted stock unit awards and performance stock unit awards.

A reconciliation of the numerators and denominators of our basic and diluted EPS computations is summarized as follows (in thousands).

	Three Months Ended March 31,
	2024		2023
Net income – basic and diluted (numerator)	$	11,612	$	7,229
Weighted average shares – basic (denominator):		102,440		101,331
Dilutive effect of stock-based awards		2,300		2,605
Weighted average shares including conversions – diluted (denominator)		104,740		103,936

The computation of EPS for the three-month periods ended March 31, 2024 and March 31, 2023 excluded non-vested stock-based awards of 283,981 shares and 349,784 shares, respectively, as the inclusion of such would have been antidilutive for the periods.

As of March 31, 2024, we had 7.5 million stock warrants outstanding (or Warrants) to purchase shares of our common stock that were exercisable for one share of common stock per Warrant at an exercise price of $29.22 (subject to adjustment). The Warrants are exercisable until they expire on April 23, 2026. The presumed exercise of these Warrants into shares of our common stock would have an antidilutive effect as the exercise price per warrant exceeded the average price of our common stock and they have been excluded from the computation of EPS for all periods presented.

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10. Segments and Geographic Area Analysis

We provide contract drilling services with different types of offshore drilling rigs and also provide such services in many geographic locations. However, we have aggregated these operations into one reportable segment based on the similarity of economic characteristics due to the nature of the revenue-earning process as it relates to the offshore drilling industry over the operating lives of our drilling rigs and other qualitative factors such as (i) the nature of services provided (contract drilling), (ii) similarity in operations (interchangeable rig crews and shared management and marketing, engineering, marine and maintenance support), (iii) similar regulatory environment (depending on customer and/or location) and (iv) similar contractual arrangements with customers.

Our drilling rigs are highly mobile and may be moved to other markets throughout the world in response to market conditions or customer needs. At March 31, 2024, our active drilling rigs were located offshore four countries in addition to the United States. Revenues by geographic area are presented by attributing revenues to the individual country where the services were performed during the periods presented, which may not be indicative of where the rigs are currently located.

The following tables provide information about disaggregated revenue by country (in thousands):

	Three Months Ended March 31, 2024
	Total  Contract  Drilling  Revenues		Revenues  Related to  Reimbursable  Expenses		Total
United States	$	146,475	$	7,328	$	153,803
United Kingdom		32,568		4,233		36,801
Australia		27,360		2,463		29,823
Brazil		26,570		—		26,570
Senegal		25,797		1,816		27,613
Total	$	258,770	$	15,840	$	274,610

	Three Months Ended March 31, 2023
	Total  Contract  Drilling  Revenues		Revenues  Related to  Reimbursable  Expenses		Total
United States	$	104,581	$	12,557	$	117,138
United Kingdom		17,702		1,060		18,762
Australia		19,309		840		20,149
Brazil		20,660		—		20,660
Senegal		52,131		3,181		55,312
Total	$	214,383	$	17,638	$	232,021

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ITEM 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

The following discussion should be read in conjunction with our unaudited condensed consolidated financial statements (including the notes thereto) included in Item 1 of Part I of this report and Item 1A, “Risk Factors” included in our Annual Report on Form 10-K for the year ended December 31, 2023. References to “Diamond Offshore,” “Company,” “we,” “us” or “our” mean Diamond Offshore Drilling, Inc., a Delaware corporation, and its subsidiaries.

We provide contract drilling services to the energy industry around the globe with a fleet of 12 floater rigs (four owned drillships, seven owned semisubmersibles and one managed rig). See “– Market Overview.”

Market Overview

During the first quarter of 2024, oil commodity prices remained elevated above their 5-year average, primarily as a result of continued OPEC+ supply restraint, muted production growth in the United States, strong growth in oil demand and expanding manufacturing trends in the United States and China signaling global economic improvements. Oil and natural gas benchmark prices are expected to remain volatile as geopolitical uncertainty resulting from conflicts in Russia/Ukraine and the Middle East may affect supply and demand. Brent crude prices reached the high $80- to low $90-per barrel range in mid-April 2024, which are the highest levels reached since October 2023. This rebound represents an approximate 20% increase since the beginning of the year, according to pricing data published by the U.S. Energy Information Administration. Commodity prices are expected to remain at levels that are supportive of investment in deepwater exploration and development projects. As of mid-April 2024, dated Brent crude oil prices for the remainder of 2024 and 2025 were in the low-to-middle $80-per-barrel range according to industry data.

In the first quarter of 2024, growth in offshore upstream capital expenditures continued to be supported by strong cash flows realized by oil and gas companies, continued expectations for growing demand, and breakeven costs well below current oil price forecasts. According to industry reports, analysts expect offshore upstream capital expenditures to increase approximately 3.3% annually, on average, from 2024 to 2027, rising to more than $230 billion by 2027, with exploration growing to approximately 12% of the capital expenditure total.

During the first quarter of 2024, the positive dynamics of increased offshore spending, coupled with the growing trend in long-cycle developments, production capacity expansions and exploration and appraisal activities, continued to drive growth in demand for floating drilling rigs. According to industry reports, on a trailing three-month basis, the volume of floating rig years contracted has grown month over month from November 2023 through February 2024, reaching its highest level since February 2023. According to data from S&P Global, in mid-April 2024 outstanding demand from floating rig tenders was approximately 56 rig years, compared to 42 rig years a year earlier, representing an increase of more than 33%. Most of this demand was concentrated in the deepwater and ultra-deepwater regions of the Gulf of Mexico, Brazil and West Africa, which are areas where we currently operate. The recent improvement in contracting activity has pushed dayrates for ultra-deepwater drilling rigs into the high $400 to low $500 thousand per day range.

This robust dayrate market, combined with anticipated growth in upstream capital spending, continues to drive further increases in rig demand and improves the economics for rig reactivations. However, supply chain constraints and inflationary pressures could limit the pace at which these additional rigs could return to the market, with some analysts estimating the average time for rig reactivations to be approximately 12 to 18 months, with costs approaching $100 million for idle rigs and $350 million for stranded rigs. The current inventory of idle rig capacity has decreased significantly and the owners of this remaining capacity have so far exhibited capital discipline as it relates to reactivation investments; however, the market could be adversely affected by the re-entry of this limited idle capacity.

Despite policy tightening by major central banks and a moderating pace of world economic expansion, inflationary pressures have generally remained elevated in the industry sector, though recent trends indicate possible moderation in some areas. Continued inflation may result in upward pressure on operating expenses for offshore drillers.

In addition to market factors, during the first quarter of 2024, customer capital allocation decisions have continued to affect demand for our services. Customer investment mixes over time, coupled with energy demand and regulatory measures, could adversely impact demand for offshore drilling services in the long term. Notwithstanding this possibility, during the first quarter, global energy demand continued to be strong and energy supply growth remained constrained. We expect increased investment in both traditional and renewable sources of energy to be required in the future, some of which we expect to be invested in finding and producing hydrocarbons in the offshore segment.

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Industry experts continue to expect the world's demand for energy will increase and that hydrocarbons will continue to serve a major role in meeting the world's energy needs for the foreseeable future.

See “– Contract Drilling Backlog” for future commitments of our rigs during the remainder of 2024 through 2028.

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Contract Drilling Backlog

We believe that our contract drilling backlog provides a useful indicator of our future revenue-earning opportunities. Our contract drilling backlog, as presented below, includes only firm commitments (typically represented by signed contracts) and is calculated by multiplying the contracted operating dayrate by the firm contract period. The contract period is based on the number of stated days for fixed-term contracts or an estimated duration (in days) for contracts based on a fixed number of wells. Our calculation also assumes full utilization of our drilling equipment for the contract period (excluding scheduled shipyard and survey days); however, the amount of actual revenue earned and the actual periods during which revenues are earned may be different than the amounts and periods shown in the tables below due to various factors. Our utilization rates, which generally have been in the range of 92-98% during contracted periods, can be adversely impacted due to various operating factors including unscheduled repairs and maintenance, weather conditions, and other factors. Contract drilling backlog excludes revenues for mobilization, demobilization, contract preparation and customer reimbursables. Revenue is generally not earned during periods of downtime for regulatory surveys; however, certain contracts may provide for reduced revenue during the survey period. Changes in our contract drilling backlog between periods are generally a function of the performance of work on term contracts, as well as the extension or modification of existing term contracts and the execution of additional contracts. In addition, under certain circumstances, our customers may seek to terminate or renegotiate our contracts, which could adversely affect our reported backlog.

The backlog information presented below does not, nor is it intended to, align with the disclosures regarding revenue expected to be recognized in the future related to unsatisfied performance obligations, which are presented in Note 2 “Revenue from Contracts with Customers” to our unaudited condensed consolidated financial statements included in Item 1 of Part I of this report. Contract drilling backlog includes only future dayrate revenue as described above, while the disclosure in Note 2 “Revenue from Contracts with Customers” excludes dayrate revenue and reflects expected future revenue for mobilization, demobilization and capital modifications to our rigs, which are related to non-distinct promises within our signed contracts. See “– Important Factors That May Impact Our Operating Results, Financial Condition or Cash Flows.”

The following table reflects our contract drilling backlog as of April 1, 2024 (based on information available at that time), January 1, 2024 (the date reported in our Annual Report on Form 10-K for the year ended December 31, 2023), and April 1, 2023 (the date reported in our Quarterly Report on Form 10-Q for the quarter ended March 31, 2023) (in millions).

	April 1, 2024		January 1,  2024		April 1, 2023
Contract Drilling Backlog (1)	$	1,877	$	1,424	$	1,596

(1)Includes contract backlog of $50.7 million, $117.6 million and $256.8 million at April 1, 2024, January 1, 2024 and April 1, 2023, respectively, attributable to customer drilling contracts secured for rigs managed, but not owned, by us. We entered into the drilling contracts directly with the customer and will receive and recognize revenue under the terms of the contract. The marketing arrangements for each of our managed rigs were terminated in 2023, and the charter agreement for the West Auriga was terminated in February 2024. The Company received notice of termination of the management agreement for the West Vela in April 2024, which will become effective after 90 days. The termination of the management agreement will have no effect on the bareboat charter agreement for the West Vela, which provides that it will continue in accordance with its terms until the completion of the rig’s existing drilling contract and any option periods.

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The following table reflects the amount of revenue related to our contract drilling backlog by year as of April 1, 2024 (in millions).

	For the Year Ending December 31,
	Total		2024 (1)		2025		2026		2027		2028
Contract Drilling Backlog (2)	$	1,877	$	662	$	552	$	471	$	190	$	2

(1)Represents the nine-month period beginning April 1, 2024.

(2)Includes contract backlog of $50.7 million in the remainder of 2024, attributable to customer drilling contract secured for the managed rig West Vela under an arrangement with an offshore drilling company (or the MMSA) whereby we provide management services for the rig.

The following table reflects the percentage of rig days per year committed as of April 1, 2024. The percentage of rig days committed is calculated as the ratio of total days committed under contracts, as well as scheduled shipyard, survey and mobilization days for all rigs in our fleet, to total available days (number of rigs, including cold-stacked rigs, multiplied by the number of days in a particular year).

	For the Year Ending December 31,
	2024 (1)			2025			2026			2027			2028
Percentage of Rig Days Committed (2)		88	%		48	%		41	%		23	%	<1%

(1)Represents the nine-month period beginning April 1, 2024.

(2)As of April 1, 2024, includes approximately 220 rig days currently known and scheduled for shipyard projects, including capital upgrades, surveys and contract preparation activities for the remainder of 2024.

Important Factors That May Impact Our Operating Results, Financial Condition or Cash Flows

Regulatory Surveys and Planned Downtime. We perform certain regulatory inspections, which we refer to as a special survey, that are due every five years for most of our rigs and an intermediate survey, which is performed every two-and-one-half years, for our North Sea rigs. Our operating income is negatively impacted when we perform these required regulatory surveys due to planned downtime during the inspection period. Our operating income is also reduced by planned downtime for upgrades, contract preparation and mobilization of rigs; however, in some cases, we may be compensated for all or a portion of this downtime. During the remainder of 2024, we expect to incur approximately 220 days of planned downtime, including approximately (i) 100 days for a shipyard project, as well as mobilization and demobilization activities for the Ocean BlackRhino; (ii) 70 days for the Ocean GreatWhite’s lower marine riser package (or LMRP) repairs; (iii) 25 days for the Ocean Endeavor’s blowout preventer (or BOP) recertification; (iv) 20 days for the Ocean BlackHornet’s special survey and (v) five days for the Ocean Apex’s mobilization activities. We can provide no assurance as to the exact timing and/or duration of downtime associated with regulatory inspections, repairs, contract preparation, rig mobilizations and other shipyard projects. See “ — Contract Drilling Backlog.”

Physical Damage and Marine Liability Insurance. Under our primary insurance policies, which renewed effective May 1, 2024, we carry $50.0 million of U.S. Named Windstorm Coverage, as defined by the relevant insurance policy, for physical damage to our property and equipment with a $10.0 million deductible per accident or occurrence. We are self-insured for physical damage to rigs and equipment caused by named windstorms in the U.S. Gulf of Mexico in excess of $50.0 million. If a named windstorm in the U.S. Gulf of Mexico causes significant damage to our rigs or equipment, it could have a material adverse effect on our results of operations, financial condition, and cash flows. Under our current insurance policy, we carry physical damage insurance for certain losses other than those caused by named windstorms in the U.S. Gulf of Mexico for which our deductible for physical damage is $10.0 million per occurrence. In addition, we currently carry loss-of-hire insurance on certain of our owned rigs to cover a portion of lost cash flow when a rig is damaged, which is a recoverable claim under the physical damage insurance but excludes named windstorms in the U.S. Gulf of Mexico.

In addition, we carry marine liability insurance covering certain legal liabilities, including coverage for certain personal injury claims, collisions, and wreck removals, and generally covering liabilities arising out of or relating to pollution and/or environmental risk. We believe that the policy limit for our marine liability insurance is within the range that is customary for companies of our size in the offshore drilling industry and is appropriate for our business. Under these marine liability policies, we generally self-insure $1.0 million to $2.5 million per occurrence, depending on jurisdiction, but up to $25.0 million for liabilities arising out of named windstorms in the U.S. Gulf of Mexico.

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Depending on the nature, severity, and frequency of claims that might arise during the policy year, if the aggregate level of claims exceeds certain thresholds, we may self-insure up to $100.0 million for each subsequent occurrence.

Critical Accounting Policies

Our significant accounting policies are discussed in Note 1 “General Information” of our notes to the audited consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2023.

Results of Operations

We have elected to present a comparison of our results of operations for the current quarter with that of the immediately preceding quarter, as permitted under Item 303(c)(2)(ii) of Regulation S-K. We believe this comparison is more useful in identifying business trends and provides a more meaningful analysis of our business as our results are largely driven by market changes rather than seasonal business activity. We continue to present the required comparison of current year-to-date results with the same period of the prior year.

Our operating results for contract drilling services are dependent on three primary metrics or key performance indicators: revenue-earning (or R-E) days, rig utilization and average daily revenue. We believe that R-E days provide a comparative measurement of the activity level of our fleet, rig utilization is an indicator of our ability to secure work for and the operational efficiency of our fleet and average daily revenue provides a comparative measure for our revenue-earning performance. We utilize these performance indicators in the review of our business and operating results and believe these are useful metrics for investors to utilize in evaluating our performance. The tables presented below include these three key performance indicators and other comparative data relating to our revenues and operating expenses for the respective periods (in thousands, except days, daily amounts and percentages) for the three-month periods ended March 31, 2024, December 31, 2023 and March 31, 2023.

Results for the Three-Month Periods Ended March 31, 2024, December 31, 2023 and March 31, 2023

	Three Months Ended
	March 31,			December 31,			March 31,
	2024			2023			2023
Revenue-Earning Days (1)		849			886			789
Utilization (2)		68	%		69	%		63	%
Average daily revenue (3)	$	305,000		$	315,800		$	271,700
Revenues:
Contract drilling	$	258,770		$	279,681		$	214,383
Revenues related to reimbursable expenses		15,840			17,956			17,638
Total revenues		274,610			297,637			232,021
Operating expenses:
Contract drilling, excluding depreciation		184,205			188,803			173,490
Reimbursable expenses		15,266			17,304			17,213
Depreciation		31,354			27,705			27,906
General and administrative		18,576			19,190			19,585
Loss (gain) on disposition of assets		3,396			(280	)		(1,213	)
Total operating expenses		252,797			252,722			236,981
Operating income (loss)		21,813			44,915			(4,960	)
Other income (expense):
Interest income		1,774			1,464		7
Interest expense		(15,346	)		(14,847	)		(12,040	)
Foreign currency transaction gain (loss)		231			(2,863	)		(1,271	)
Other, net		(71	)		(54	)		(152	)
Income (loss) before income tax benefit		8,401			28,615			(18,416	)
Income tax benefit (expense)		3,211			(174,317	)		25,645
Net income (loss)	$	11,612		$	(145,702	)	$	7,229

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(1)An R-E day is defined as a 24-hour period during which a rig earns a dayrate after commencement of operations and excludes mobilization, demobilization and contract preparation days.

(2)Utilization is calculated as the ratio of total R-E days divided by the total calendar days in the period for all rigs in our fleet (including managed and cold-stacked rigs).

(3)Average daily revenue is defined as total contract drilling revenue for all of the rigs in our fleet (including managed rigs) per R-E day.

Three Months Ended March 31, 2024 Compared to Three Months Ended December 31, 2023

Contract Drilling Revenue. Contract drilling revenue decreased $20.9 million during the three months ended March 31, 2024 compared to the three months ended December 31, 2023, primarily due to lower average daily revenue earned ($9.2 million), combined with a 37-day decrease in R-E days ($11.7 million).

The decrease in average daily revenue during the first quarter of 2024, compared to the fourth quarter of 2023, was primarily due to the absence of incremental revenue recognized in the fourth quarter of 2023 related to favorable settlements with customers regarding equipment issues and non-productive time, which had occurred earlier in 2023, performance bonuses for the Ocean BlackHawk and Ocean BlackRhino and an early termination fee received by the Ocean Apex.

R-E days decreased during the first quarter of 2024, primarily due to downtime as a result of the Ocean GreatWhite being out of service and in shipyard for repairs due to the LMRP incident (60 fewer R-E days), termination of the managed services agreement and charter of the West Auriga (30 fewer days), warm stacking of the Ocean Patriot between contracts (29 fewer R-E days) and aggregate net incremental downtime for repairs for other rigs in our fleet (14 fewer R-E days). The decrease in R-E days was partially offset by nearly full-quarter operations for the Ocean Courage and Ocean BlackHawk in 2024 (96 incremental days), compared to the fourth quarter of 2023 when both rigs completed shipyard projects in advance of their current contracts.

Contract Drilling Expense, Excluding Depreciation. Contract drilling expense, excluding depreciation decreased $4.6 million during the first quarter of 2024, compared to the fourth quarter of 2023. Lower expense in the 2024 period was primarily due to reduced charter costs for the managed rigs ($13.0 million), as well as lower other operating expense for the West Auriga, primarily due to the termination of the rig’s MMSA at the end of February 2024 ($5.3 million) and the absence of expense associated with an annual efficiency bonus recognized in the fourth quarter of 2023 related to a services agreement for certain well control equipment on our drillships ($6.0 million). The reduction in costs between periods was partially offset by higher operating expenses for the Ocean BlackHawk and Ocean Courage ($10.6 million), which operated under contract for nearly a full quarter in 2024, compared to being in shipyard during portions of the fourth quarter of 2023, $7.6 million in non-recoverable expense (or a portion of the insurance deductible) associated with repairs for the Ocean GreatWhite attributable to the LMRP incident and a net increase in operating expense for the other rigs in our fleet ($1.5 million).

Loss on disposition of assets. We recorded a net loss on disposition of assets of $3.4 million for the first quarter of 2024, which included $2.4 million in non-recoverable expense (or a portion of the insurance deductible) associated with capital repairs for the Ocean GreatWhite.

Income Tax Benefit. We estimate our annual effective tax rate (or AETR) for continuing operations in recording our interim quarterly income tax provision, considering the various jurisdictions in which we operate. We exclude discrete tax adjustments from the computation of the AETR and record such adjustments in the quarter in which they occur.

We recorded a net income tax benefit of $3.2 million for the three months ended March 31, 2024. For the three months ended December 31, 2023, we recorded a net income tax expense of $174.3million. The effective tax rate for the quarter ended March 31, 2024 resulted from the mix of pre-tax income and loss across jurisdictions, increased profitability in jurisdictions which rigs are currently operating, and the effect of discrete items, specifically a benefit on remeasurement of uncertain tax positions in Egypt.

Three Months Ended March 31, 2024 Compared to Three Months Ended March 31, 2023

Contract Drilling Revenue. Contract drilling revenue increased $44.4 million during the three months ended March 31, 2024 compared to the three months ended March 31, 2023, primarily due to higher average daily revenue earned ($28.2 million), in addition to a 60-day increase in R-E days ($16.2 million).

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Average daily revenue earned during the first quarter of 2024 increased, compared to the first quarter of 2023, primarily due to higher dayrates earned by several rigs in the fleet, which operated under new contracts or extensions that commenced after the first quarter of 2023.

R-E days increased during the first quarter of 2024, compared to the first quarter of 2023, primarily due to incremental operating days for the Ocean Endeavor, which completed shipyard repairs in the first quarter of 2023, and the West Vela, which was warm stacked between contracts during the first quarter of 2023 (105 incremental days). The increase in R-E days during the 2024 period was partially offset by a net increase in downtime for repairs (20 fewer R-E days), the warm-stacking of rigs between contracts (26 fewer R-E days) and termination of the MMSA for the West Auriga (23 fewer R-E days). Comparing the quarters, the Ocean GreatWhite had achieved 24 incremental R-E days prior to going out of service for repairs as a result of the LMRP incident during the first quarter of 2024.

Contract Drilling Expense, Excluding Depreciation. Contract drilling expense, excluding depreciation increased $10.7 million during the first quarter of 2024, compared to the first quarter of 2023 and reflected higher net expense for the managed rigs ($5.8 million), primarily due to higher charter fees for both managed rigs, partially offset by lower repair and maintenance costs for the West Vela, and also included $7.6 million in non-recoverable expense (or a portion of the insurance deductible) associated with repairs for the Ocean GreatWhite. Comparing the periods, contract drilling expense was reduced by a net decrease in other operating costs across our owned rig fleet ($2.7 million) during the first quarter of 2024.

Interest Expense. Interest expense increased $3.3 million during the first quarter of 2024, primarily due to higher average debt outstanding compared to the first quarter of 2023. Interest expense for the first quarter of 2024 included $12.2 million in expense related to our $550.0 million aggregate principal amount of senior secured second lien notes (or the Second Lien Notes), which bear interest at 8.5%, and the amortization of associated debt issuance costs. During the first quarter of 2023, we incurred interest expense of $8.8 million on weighted average debt outstanding of approximately $354.0 million at an average interest rate of 9.5%, in addition to amortization of associated debt issuance costs and debt premium.

Loss (gain) on disposition of assets. We recorded a net loss on disposition of assets of $3.4 million for the first quarter of 2024, which included $2.4 million in non-recoverable expense (or a portion of the insurance deductible) associated with capital repairs for the LMRP and related equipment on the Ocean GreatWhite. During the first quarter of 2023, we recognized a $1.2 million gain on disposition of surplus equipment.

Income Tax Benefit. We recorded a net income tax benefit of $3.2 million for the three months ended March 31, 2024, inclusive of a $12.2 million tax benefit on the revaluation of unrecognized tax liabilities in Egypt due to the significant weakening of the Egyptian pound. For the three months ended March 31, 2023, we recorded a net income tax benefit of $25.6 million. The effective tax rate for the three months ended March 31, 2024 was the result of the mix of pre-tax income and loss across jurisdictions, increased profitability in jurisdictions which rigs are currently operating, and the effect of discrete items, specifically a benefit on remeasurement of uncertain tax positions in Egypt.

Liquidity and Capital Resources

We have available a senior secured revolving credit agreement, which provides for a $300.0 million senior secured revolving credit facility (or the RCF). The RCF is scheduled to mature on April 22, 2026. See Note 6 “Long-Term Debt” to our unaudited condensed consolidated financial statements included in Item 1 of Part I of this report for a discussion of our RCF.

At May 6, 2024, we had no borrowings outstanding under the RCF, and a $1.9 million letter of credit had been issued thereunder. As of May 6, 2024, approximately $298.1 million was available for borrowings under the RCF subject to its terms and conditions; however, the availability of borrowings under the RCF is subject to the satisfaction of certain conditions as specified in our revolving credit agreement, including restrictions on borrowings.

There is no capacity for the issuance of new letters of credit under the RCF, but the RCF permits us to obtain up to $50.0 million in letters of credit outside the RCF. We have obtained a $25.0 million letter of credit facility; however, letters of credit thereunder must be cash collateralized.

Historically, we have relied on our cash flows from operations and cash reserves to meet our liquidity needs, which primarily include funding of our working capital requirements and capital expenditures, as well as the servicing of our debt repayments and interest payments. As of May 6, 2024, all of our rigs, excluding the managed rig, are

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owned and operated, directly or indirectly, by Diamond Foreign Asset Company (or DFAC). Our management has determined that we will permanently reinvest foreign earnings, which restricts the ability to utilize cash flows of DFAC on a company-wide basis. To the extent possible, we expect to utilize the operating cash flows and cash reserves of DFAC and the operating cash flows available to and cash reserves of Diamond Offshore Drilling, Inc. to meet each respective entity's working capital requirements and capital commitments.

From time to time, based on market conditions and other factors, we may seek to repay, refinance or restructure all or a portion of our outstanding indebtedness or otherwise enter into transactions regarding our capital structure to obtain more favorable terms, enhance flexibility in conducting our business, increase liquidity or otherwise. We regularly evaluate capital markets to consider future opportunities for enhancements of our capital structure and may opportunistically pursue financing transactions to optimize our capital structure. Our ability to access the capital markets by issuing debt or equity securities will be dependent on our results of operations, our current financial condition, current credit ratings, current market conditions and other factors beyond our control, and there can be no assurance that we would be able to complete any such offering of securities.

As of April 1, 2024, our contractual backlog was approximately $1.9 billion. At March 31, 2024, we had cash of $169.2 million, including $6.8 million that is subject to restrictions pursuant to the MMSA.

Sources and Uses of Cash

Cash Flows and Cash Expenditures

For the three-month period ended March 31, 2024, our operating activities generated cash of $59.0 million. Cash receipts from contract drilling services ($315.7 million) were partially offset by cash expenditures for contract drilling, shorebase support, and general and administrative costs ($256.6 million).

Cash outlays for capital expenditures during the first three months of 2024 aggregated $27.9 million, primarily related to long-lead items for the Ocean BlackRhino’s shipyard project and equipment updates scheduled for the second half of 2024. We also made payments of $4.3 million under finance lease obligations related to well control equipment on our owned drillships.

For the three-month period ended March 31, 2023, our operating activities used cash of $8.2 million. Cash expenditures for contract drilling, shorebase support, and general and administrative costs ($232.9 million), were partially offset by cash receipts from contract drilling services ($217.0 million) and a net refund of cash income taxes ($7.7 million), primarily in the U.S. tax jurisdiction, during the three-month period.

Cash outlays for capital expenditures during the first quarter of 2023 aggregated $29.4 million (including capital outlays for the Ocean Endeavor and Ocean GreatWhite shipyard projects completed this year). We also repaid $15.0 million in outstanding draws under the RCF and made payments in connection with finance lease obligations aggregating $4.1 million related to our owned drillships.

Ocean GreatWhite

On February 1, 2024, the Ocean GreatWhite, reported an equipment incident while located in the North Sea west of the Shetland Islands. The rig’s lower marine riser package (“LMRP”) and deployed riser string unintentionally separated from the rig at the slip joint tensioner ring and the LMRP and riser dropped to the seabed. We have safely recovered the LMRP from the seabed and are in a repair facility in Kishorn port, where repairs to the LMRP and any related work are underway.

We anticipate that the LMRP incident will be covered by our hull & machinery insurance policy and that all incremental costs, less our $10.0 million deductible, will be reimbursable under that policy. In addition, we carry loss-of-hire insurance on the Ocean GreatWhite to cover a portion of lost cash flow under certain circumstances. After a 60-day waiting period, our loss-of-hire insurance provides $150,000 per day, for up to 180 days, for each day of lost revenue as a result of a covered property loss claim. As of the date of this report, we estimate the cash flow impact of direct and incremental recovery, repairs and maintenance costs, and replacement capital expenditures, offset by loss of hire insurance, to be approximately $25.0 million to $30.0 million dollars. However, we cannot fully predict the extent of such insurance coverage or the timing of such claims.

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Capital Expenditures and Other Projects

We have historically invested a significant portion of our cash flows in the enhancement of our drilling fleet and our ongoing rig equipment replacement and capital maintenance programs. The amount of cash required to meet our capital commitments is determined by evaluating the need to upgrade our rigs to meet specific customer requirements and our rig equipment enhancement, maintenance and replacement programs. We make periodic assessments of our capital spending programs based on current and expected industry conditions and our cash flow forecast. As of the date of this report, we expect total capital expenditures for 2024 to be approximately $135.0 million to $145.0 million.

Other Obligations

As of March 31, 2024, the amount of total net unrecognized tax benefits related to uncertain tax positions that could result in a future cash payment was $40.3 million. Due to the high degree of uncertainty regarding the timing of future cash outflows associated with the liabilities recognized in these balances, we are unable to make reasonably reliable estimates of the period of cash settlement with the respective taxing authorities. Included in the balance is $21.0 million related to prior years’ operations in Egypt.

Other Commercial Commitments - Letters of Credit

See Note 7 “Commitments and Contingencies” to our unaudited condensed consolidated financial statements included in Item 1 of Part I of this report for a discussion of certain of our other commercial commitments.

Forward-Looking Statements

We or our representatives may, from time to time, either in this report, in periodic press releases or otherwise, make or incorporate by reference certain written or oral statements that are “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended (or the Securities Act) and Section 21E of the Securities Exchange Act of 1934, as amended (or the Exchange Act). All statements other than statements of historical fact are, or may be deemed to be, forward-looking statements. Forward-looking statements include, without limitation, any statement that may project, indicate or imply future results, events, performance or achievements, and may contain or be identified by the words “expect,” “intend,” “plan,” “predict,” “anticipate,” “estimate,” “believe,” “should,” “could,” “would,” “may,” “might,” “will,” “will be,” “will continue,” “will likely result,” “project,” “forecast,” “budget” and similar expressions. In addition, any statement concerning future financial performance (including, without limitation, future revenues, earnings or growth rates), ongoing business strategies or prospects, and possible actions taken by or against us, which may be provided by management, are also forward-looking statements as so defined. Statements made by us in this report that contain forward-looking statements may include, but are not limited to, information concerning our possible or assumed future results of operations and statements about the following subjects:

•market conditions and the effect of such conditions on our future results of operations;

•offshore exploration activity, future investment in hydrocarbons, future spending trends or growth, customer capital allocation and commitments, drilling contract duration trends, and customer spending programs and future projects;

•contractual obligations and future contract negotiations;

•future commodity prices and volatility, dayrates or utilization;

•market outlook;

•the transition to renewable energy sources and other alternative forms of energy;

•future energy demand and future demand for offshore drilling services;

•global energy demand and the role of hydrocarbons in meeting the world’s energy needs;

•inflation;

•future economic trends, including interest rates and recessionary economic conditions;

•operations outside the United States;

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•geopolitical events and risks, including Russia’s invasion of Ukraine and related sanctions, conflict in the Middle East including the armed conflict between Israel and Hamas, and related disruptions;

•business strategy;

•strategic initiatives;

•growth opportunities;

•competitive position including, without limitation, competitive rigs entering the market;

•expected financial position and liquidity;

•cash flows and contract backlog;

•sources and uses of and requirements for financial resources and sources of liquidity;

•idling drilling rigs or reactivating stacked or stranded rigs;

•outcomes of litigation and legal proceedings;

•declaration and payment of dividends;

•expectations regarding our plans and strategies;

•financing plans;

•any repayment, refinancing or restructuring of our outstanding indebtedness or other transaction regarding our capital structure or any offering of securities or other capital markets transaction;

•debt levels and the impact of changes in the credit markets, including interest rates;

•budgets for capital and other expenditures;

•interest rate and foreign exchange risk;

•business plans or financial condition of our customers;

•duration and impacts of the COVID-19 pandemic, including new variants of the virus, lockdowns, re-openings and any other related actions taken by businesses and governments on the offshore drilling industry and our business, operations, supply chain and personnel, financial condition, results of operations, cash flows and liquidity;

•ESG trends, practices and related matters;

•tax planning and effects of the Inflation Reduction Act;

•changes in tax laws and policies or adverse outcomes resulting from examination of our tax returns;

•contractual obligations related to our well control equipment services agreement and potential exercise of the purchase option at the end of the original lease term;

•the MMSA and charters with an offshore drilling company and future management services thereunder;

•any response to the equipment incident on the Ocean GreatWhite, any related damage or environmental impact or efforts to recover equipment or replace any missing or damaged equipment;

•the estimated downtime, duration of repairs, cost of repairs and replacement capital, and the insurance claim, coverage and estimated insurance recovery and costs as a result of the equipment incident on the Ocean GreatWhite;

•timing and duration of required regulatory inspections for our drilling rigs and other planned downtime;

•process and timing for acquiring regulatory permits and approvals for our drilling operations;

•timing and cost of completion of capital projects;

•delivery dates and drilling contracts related to capital projects;

•plans and objectives of management;

•sale or scrapping of retired rigs;

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•asset impairments and impairment evaluations;

•assets held for sale;

•our internal controls and internal control over financial reporting;

•performance of contracts;

•cybersecurity;

•unionization efforts;

•compliance with applicable laws; and

•availability, limits and adequacy of insurance or indemnification.

These types of statements are based on current expectations about future events and inherently are subject to a variety of assumptions, risks and uncertainties, many of which are beyond our control, that could cause actual results to differ materially from those expected, projected or expressed in forward-looking statements. These risks and uncertainties include, among others, those described or referenced in Item 1A, “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2023.

The risks and uncertainties referenced above are not exhaustive. Other sections of this report and our other filings with the Securities and Exchange Commission include additional factors that could adversely affect our business, results of operations and financial performance. Given these risks and uncertainties, investors should not place undue reliance on forward-looking statements. Forward-looking statements included in this report speak only as of the date of this report. We expressly disclaim any obligation 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. In addition, in certain places in this report, we may refer to reports published by third parties that purport to describe trends or developments in energy production or drilling and exploration activity. While we believe that these reports are reliable, we have not independently verified the information included in such reports. We specifically disclaim any responsibility for the accuracy and completeness of such information and undertake no obligation to update such information.

ITEM 3. Quantitative and Qualitative Disclosures About Market Risk.

The information included in this Item 3 constitutes “forward-looking statements” for purposes of the statutory safe harbor provided in Section 27A of the Securities Act and Section 21E of the Exchange Act. See “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Forward-Looking Statements” in Item 2 of Part I of this report.

Interest Rate Risk. From time to time, we may have exposure to interest rate risk on our debt instruments that may arise from changes in the level or volatility of interest rates. As of March 31, 2024, we had no variable rate debt outstanding. Our Second Lien Notes have been issued at fixed rates, and as such, interest expense would not be impacted by interest rate shifts.

There were no other material changes in our market risk components for the three months ended March 31, 2024. See “Quantitative and Qualitative Disclosures About Market Risk” included in Item 7A of our Annual Report on Form 10-K for the year ended December 31, 2023 for further information.

ITEM 4. Controls and Procedures.

We maintain a system of disclosure controls and procedures that are designed to ensure that information required to be disclosed by us in reports that we file or submit under the federal securities laws, including this report, is recorded, processed, summarized and reported on a timely basis. These disclosure controls and procedures include controls and procedures designed to ensure that information required to be disclosed by us under the federal securities laws is accumulated and communicated to our management on a timely basis to allow decisions regarding required disclosure.

Our Chief Executive Officer (or CEO) and Chief Financial Officer (or CFO) participated in an evaluation by our management of the effectiveness of our disclosure controls and procedures (as defined in Exchange Act Rules

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13a-15(e) and 15d-15(e)) as of March 31, 2024. Based on their participation in that evaluation, our CEO and CFO concluded that our disclosure controls and procedures were effective as of March 31, 2024.

There were no changes in our internal control over financial reporting identified in connection with the foregoing evaluation that occurred during our first fiscal quarter of 2024 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II. OTHER INFORMATION

ITEM 1. Legal Proceedings.

Information related to certain legal proceedings is included in Note 7 “Commitments and Contingencies” to our unaudited condensed consolidated financial statements included in Item 1 of Part I of this report, which is incorporated herein by reference.

ITEM 1A. Risk Factors.

Our Annual Report on Form 10-K for the year ended December 31, 2023 includes a detailed discussion of certain material risk factors facing the Company. The risk factors included under Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2023 are incorporated herein by reference. No material changes have been made to such risk factors as of March 31, 2024.

ITEM 5. Other Information.

Items 5(a) and 5(b) are not applicable.

(c) On March 4, 2024, Bernie Wolford, Jr., President and Chief Executive Officer, entered into a pre-arranged stock trading plan (the “Wolford 10b5-1 Plan”). The Wolford 10b5-1 Plan was entered into during an open insider trading window and is intended to satisfy the affirmative defense of Rule 10b5-1(c) of the Exchange Act and our policies regarding trading in our securities. The Wolford 10b5-1 Plan provides for the potential sale of up to 408,000 shares of the Company’s common stock between June 3, 2024 and May 30, 2025, subject to the terms and conditions of the plan.

On March 4, 2024, Dominic A. Savarino, Senior Vice President and Chief Financial Officer, entered into a pre-arranged stock trading plan (the “Savarino 10b5-1 Plan”). The Savarino 10b5-1 Plan was entered into during an open insider trading window and is intended to satisfy the affirmative defense of Rule 10b5-1(c) of the Exchange Act and our policies regarding trading in our securities. The Savarino 10b5-1 Plan provides for the potential sale of up to 18,226 shares of the Company’s common stock between June 3, 2024 and December 31, 2024, subject to the terms and conditions of the plan.

On March 4, 2024, David L. Roland, Senior Vice President, General Counsel and Secretary, entered into a pre-arranged stock trading plan (the “Roland 10b5-1 Plan”). The Roland 10b5-1 Plan was entered into during an open insider trading window and is intended to satisfy the affirmative defense of Rule 10b5-1(c) of the Exchange Act and our policies regarding trading in our securities. The Roland 10b5-1 Plan provides for the potential sale of up to 40,000 shares of the Company’s common stock between June 3, 2024 and April 4, 2025, subject to the terms and conditions of the plan.

During the quarter ended March 31, 2024, no other director or officer adopted or terminated any Rule 10b5-1 trading arrangement or non-Rule 10b5-1 trading arrangement, in each case as such terms are defined in Item 408 of Regulation S-K.

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ITEM 6. Exhibits.

Exhibit No.	Description of Exhibit
3.1	Fourth Amended and Restated Certificate of Incorporation of Diamond Offshore Drilling, Inc. (incorporated by reference to Exhibit 3.1 to our Current Report on Form 8-K filed on May 10, 2023).
3.2	Third Amended and Restated Bylaws of Diamond Offshore Drilling, Inc. (incorporated by reference to Exhibit 3.1 to our Current Report on Form 8-K filed on February 10, 2023).
10.1	Form of 2024 Time-Vesting Restricted Stock Unit Award Agreement (incorporated by reference to Exhibit 10.23 to our Annual Report on Form 10-K filed on February 28, 2024).
10.2	Form of 2024 Executive Performance-Vesting Restricted Stock Unit Award Agreement (incorporated by reference to Exhibit 10.24 to our Annual Report on Form 10-K filed on February 28, 2024).
31.1*	Rule 13a-14(a) Certification of the Chief Executive Officer.
31.2*	Rule 13a-14(a) Certification of the Chief Financial Officer.
32.1*	Section 1350 Certification of the Chief Executive Officer and Chief Financial Officer.
101.INS*	Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH*	Inline XBRL Taxonomy Extension Schema With Embedded Linkbase Document.
104*	The cover page of our Quarterly Report on Form 10-Q for the quarter ended March 31, 2024, formatted in Inline XBRL (included with the Exhibit 101 attachments).

* Filed or furnished herewith.

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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 thereunto duly authorized.

	DIAMOND OFFSHORE DRILLING, INC.
	(Registrant)
Date May 8, 2024	By:	/s/ Dominic A. Savarino
		Dominic A. Savarino
		Senior Vice President and Chief Financial Officer

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EX-31.1

Exhibit 31.1

I, Bernie Wolford, Jr., certify that:

1.I have reviewed this Quarterly Report on Form 10-Q for the quarter ended March 31, 2024 of Diamond Offshore Drilling, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 8, 2024

/s/ Bernie Wolford, Jr.

Bernie Wolford, Jr.

President and Chief Executive Officer

EX-31.2

Exhibit 31.2

I, Dominic A. Savarino, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q for the quarter ended March 31, 2024 of Diamond Offshore Drilling, Inc.;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 8, 2024

/s/ Dominic A. Savarino

Dominic A. Savarino

Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED BY SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

Each of the undersigned hereby certifies, pursuant to 18 U.S.C. § 1350, in his capacity as an officer of Diamond Offshore Drilling, Inc. (the “Company”), that, to his knowledge:

(1) the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2024 as filed with the U.S. Securities and Exchange Commission on the date hereof (the “Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: May 8, 2024

/s/ Bernie Wolford, Jr.

Bernie Wolford, Jr.

President and Chief Executive Officer of the Company

/s/ Dominic A. Savarino

Dominic A. Savarino

Chief Financial Officer of the Company

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2024	May 06, 2024
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2024
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Trading Symbol	DO
Entity Registrant Name	DIAMOND OFFSHORE DRILLING, INC.
Entity Central Index Key	0000949039
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		102,481,240
Title of 12(b) Security	Common Stock, $0.0001 par value per share
Entity Current Reporting Status	Yes
Entity File Number	1-13926
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	76-0321760
Entity Address, Address Line One	777 N. Eldridge Parkway, Suite 1100
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77079
City Area Code	281
Local Phone Number	492-5300
Security Exchange Name	NYSE
Document Quarterly Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
Entity Bankruptcy Proceedings, Reporting Current	true

XML

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents		$ 162,409	$ 124,457
Restricted cash		6,832	14,231
Accounts receivable		225,654	260,124
Less: allowance for credit losses	[1]	(5,731)	(5,801)
Accounts receivable, net		219,923	254,323
Prepaid expenses and other current assets		57,402	63,412
Asset held for sale		1,000	1,000
Total current assets		447,566	457,423
Drilling and other property and equipment, net of accumulated depreciation		1,153,040	1,156,368
Other assets		89,488	98,762
Total assets		1,690,094	1,712,553
Current liabilities:
Accounts payable		40,630	42,037
Accrued liabilities		185,132	203,336
Taxes payable		33,296	34,817
Current finance lease liabilities		16,286	15,960
Total current liabilities		275,344	296,150
Long-term debt		534,009	533,514
Noncurrent finance lease liabilities		108,537	113,201
Deferred tax liability		15,472	10,966
Other liabilities		97,421	113,871
Commitments and contingencies (Note 7)
Total liabilities		1,030,783	1,067,702
Stockholders’ equity:
Preferred stock (par value $0.0001, 50,000 shares authorized, none issued and outstanding at March 31, 2024 and December 31, 2023)		0	0
Common stock (par value $0.0001, 750,000 shares authorized; 103,399 shares issued and 102,479 shares outstanding at March 31, 2024 and 103,189 shares issued and 102,322 shares outstanding at December 31, 2023)		10	10
Additional paid-in capital		982,098	978,575
Treasury stock		(9,154)	(8,493)
Accumulated deficit		(313,649)	(325,261)
Accumulated other comprehensive income		6	20
Total stockholders’ equity		659,311	644,851
Total liabilities and stockholders’ equity		$ 1,690,094	$ 1,712,553

[1] The allowance for credit losses at March 31, 2024 and December 31, 2023 represents our estimate of credit losses associated with our “Trade receivables” and “Current contract assets.” See Note 4 “Financial Instruments and Fair Value Disclosures” for a discussion of our concentrations of credit risk and allowance for credit losses.

XML

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares shares in Thousands	Mar. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	50,000	50,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	750,000	750,000
Common stock, shares issued	103,399	103,189
Common stock, shares outstanding	102,479	102,322

XML

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues:
Total revenues	$ 274,610	$ 232,021
Operating expenses:
Depreciation	31,354	27,906
General and administrative	18,576	19,585
Loss (gain) on disposition of assets	3,396	(1,213)
Total operating expenses	252,797	236,981
Operating income (loss)	21,813	(4,960)
Other income (expense):
Interest income	1,774	7
Interest expense, net of amounts capitalized	(15,346)	(12,040)
Foreign currency transaction gain (loss)	231	(1,271)
Other, net	(71)	(152)
Income (loss) before income tax benefit	8,401	(18,416)
Income tax benefit	3,211	25,645
Net income	$ 11,612	$ 7,229
Earnings per share, Basic	$ 0.11	$ 0.07
Earnings per share, Diluted	$ 0.11	$ 0.07
Weighted-average shares outstanding, Basic	102,440	101,331
Weighted-average shares outstanding, Diluted	104,740	103,936
Contract Drilling [Member]
Revenues:
Total revenues	$ 258,770	$ 214,383
Operating expenses:
Contract drilling, excluding depreciation	184,205	173,490
Reimbursable Expenses [Member]
Revenues:
Total revenues	15,840	17,638
Operating expenses:
Contract drilling, excluding depreciation	$ 15,266	$ 17,213

XML

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 11,612	$ 7,229
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Unrealized loss on marketable securities (net of tax of $1)	(14)	0
Comprehensive income	$ 11,598	$ 7,229

XML

Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Unrealized loss on marketable securities (net of tax)	$ 1	$ 1

XML

Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income [Member]	Treasury Stock [Member]
Beginning Balance at Dec. 31, 2022	$ 679,670	$ 10	$ 964,467	$ (280,555)		$ (4,252)
Beginning Balance, shares at Dec. 31, 2022		101,320				564
Net income	7,229			7,229
Stock-based compensation, net of tax	3,938		4,072			$ (134)
Stock-based compensation, net of tax, shares		38				11
Ending Balance at Mar. 31, 2023	690,837	$ 10	968,539	(273,326)		$ (4,386)
Ending Balance, shares at Mar. 31, 2023		101,358				575
Beginning Balance at Dec. 31, 2023	644,851	$ 10	978,575	(325,261)	$ 20	$ (8,493)
Beginning Balance, shares at Dec. 31, 2023		102,322				867
Net income	11,612			11,612
Stock-based compensation, net of tax	2,862		3,523			$ (661)
Stock-based compensation, net of tax, shares		157				53
Unrealized loss on marketable securities	(14)				(14)
Ending Balance at Mar. 31, 2024	$ 659,311	$ 10	$ 982,098	$ (313,649)	$ 6	$ (9,154)
Ending Balance, shares at Mar. 31, 2024		102,479				920

XML

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating activities:
Net income	$ 11,612	$ 7,229
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation	31,354	27,906
Loss (gain) on disposition of assets	3,396	(1,213)
Deferred tax provision	(7,525)	(14,457)
Stock-based compensation expense	3,590	4,414
Contract liabilities, net	4,865	297
Contract assets, net	10	(270)
Deferred contract costs, net	5,867	(2,560)
Other assets, noncurrent	860	(400)
Other liabilities, noncurrent	(874)	1,883
Other	963	706
Changes in operating assets and liabilities:
Accounts receivable	34,400	(15,023)
Prepaid expenses and other current assets	(128)	(4,229)
Accounts payable and accrued liabilities	(29,300)	(7,796)
Taxes payable	(72)	(4,664)
Net cash provided by (used in) operating activities	59,018	(8,177)
Investing activities:
Capital expenditures	(27,935)	(29,413)
Proceeds from disposition of assets, net of disposal costs	3,805	663
Net cash used in investing activities	(24,130)	(28,750)
Financing activities:
Repayments under revolving credit facility	0	(15,000)
Principal payments of finance leases	(4,335)	(4,079)
Net cash used in financing activities	(4,335)	(19,079)
Net change in cash, cash equivalents and restricted cash	30,553	(56,006)
Cash, cash equivalents and restricted cash, beginning of period	138,688	97,334
Cash, cash equivalents and restricted cash, end of period	$ 169,241	$ 41,328

XML

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Pay vs Performance Disclosure
Net Income (Loss)	$ 11,612	$ 7,229

XML

Insider Trading Arrangements

3 Months Ended

Mar. 31, 2024

shares

Trading Arrangements, by Individual

Material Terms of Trading Arrangement

On March 4, 2024, Bernie Wolford, Jr., President and Chief Executive Officer, entered into a pre-arranged stock trading plan (the “Wolford 10b5-1 Plan”). The Wolford 10b5-1 Plan was entered into during an open insider trading window and is intended to satisfy the affirmative defense of Rule 10b5-1(c) of the Exchange Act and our policies regarding trading in our securities. The Wolford 10b5-1 Plan provides for the potential sale of up to 408,000 shares of the Company’s common stock between June 3, 2024 and May 30, 2025, subject to the terms and conditions of the plan.

On March 4, 2024, Dominic A. Savarino, Senior Vice President and Chief Financial Officer, entered into a pre-arranged stock trading plan (the “Savarino 10b5-1 Plan”). The Savarino 10b5-1 Plan was entered into during an open insider trading window and is intended to satisfy the affirmative defense of Rule 10b5-1(c) of the Exchange Act and our policies regarding trading in our securities. The Savarino 10b5-1 Plan provides for the potential sale of up to 18,226 shares of the Company’s common stock between June 3, 2024 and December 31, 2024, subject to the terms and conditions of the plan.

On March 4, 2024, David L. Roland, Senior Vice President, General Counsel and Secretary, entered into a pre-arranged stock trading plan (the “Roland 10b5-1 Plan”). The Roland 10b5-1 Plan was entered into during an open insider trading window and is intended to satisfy the affirmative defense of Rule 10b5-1(c) of the Exchange Act and our policies regarding trading in our securities. The Roland 10b5-1 Plan provides for the potential sale of up to 40,000 shares of the Company’s common stock between June 3, 2024 and April 4, 2025, subject to the terms and conditions of the plan.

During the quarter ended March 31, 2024, no other director or officer adopted or terminated any Rule 10b5-1 trading arrangement or non-Rule 10b5-1 trading arrangement, in each case as such terms are defined in Item 408 of Regulation S-K.

Bernie Wolford, Jr. [Member]

Trading Arrangements, by Individual

Name

Bernie Wolford, Jr.

Title

President and Chief Executive Officer

Rule 10b5-1 Arrangement Adopted

true

Adoption Date

March 4, 2024

Termination Date

May 30, 2025

Arrangement Duration

361 days

Aggregate Available

408,000

Dominic A. Savarino [Member]

Trading Arrangements, by Individual

Name

Dominic A. Savarino

Title

Senior Vice President and Chief Financial Officer

Rule 10b5-1 Arrangement Adopted

true

Adoption Date

March 4, 2024

Termination Date

December 31, 2024

Arrangement Duration

211 days

Aggregate Available

18,226

David L. Roland [Member]

Trading Arrangements, by Individual

Name

David L. Roland

Title

Senior Vice President, General Counsel and Secretary

Rule 10b5-1 Arrangement Adopted

true

Adoption Date

March 4, 2024

Termination Date

April 4, 2025

Arrangement Duration

305 days

Aggregate Available

40,000

Other Officers or Directors [Member]

Trading Arrangements, by Individual

Title

other director or officer

Rule 10b5-1 Arrangement Adopted

false

Non-Rule 10b5-1 Arrangement Adopted

false

Rule 10b5-1 Arrangement Terminated

false

Non-Rule 10b5-1 Arrangement Terminated

false

XML

General Information

3 Months Ended

Mar. 31, 2024

Accounting Policies [Abstract]

General Information

1. General Information

The unaudited condensed consolidated financial statements of Diamond Offshore Drilling, Inc. and subsidiaries, which we refer to as “Diamond Offshore,” “Company,” “we,” “us” or “our,” should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2023.

Interim Financial Information

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with United States generally accepted accounting principles (or GAAP) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X of the Securities and Exchange Commission. Accordingly, pursuant to such rules and regulations, they do not include all disclosures required by GAAP for annual financial statements. The condensed consolidated financial information has not been audited but, in the opinion of management, includes all adjustments (consisting of normal recurring adjustments) necessary for a fair presentation of Diamond Offshore’s condensed consolidated balance sheets, statements of operations, statements of comprehensive income, statements of stockholders’ equity and statements of cash flows at the dates and for the periods indicated. Results of operations for interim periods are not necessarily indicative of results of operations for the respective full years.

Use of Estimates in the Preparation of Financial Statements

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amount of revenues and expenses during the reporting period. Actual results could differ from those estimated.

Restricted Cash

We maintain a restricted cash bank account which is subject to restrictions pursuant to a management services agreement with an offshore drilling company. See Note 2 “Revenue from Contracts with Customers.”

We classify such restricted cash accounts in current assets if the restrictions are expected to expire or otherwise be resolved within one year or if such funds are considered to offset current liabilities. At March 31, 2024 and December 31, 2023, our restricted cash was considered to be current and was recorded in “Restricted cash” in our unaudited Condensed Consolidated Balance Sheets.

Asset Held for Sale

We reported the $1.0 million carrying value of the Ocean Monarch as “Asset held for sale” in our unaudited Condensed Consolidated Balance Sheets at March 31, 2024. The rig was sold in April 2024 for aggregate proceeds of approximately $7.5 million.

Accounting Principles Not Yet Adopted

In December 2023, the Financial Accounting Standards Board (or FASB) issued Accounting Standards Update (or ASU) No. 2023-09, Income Tax (Topic 740): Improvements to Income Tax Disclosures (or ASU 2023-09). ASU 2023-09 requires business entities on an annual basis to (i) disclose specific categories in the rate reconciliation and (ii) provide additional information for reconciling items that meet certain quantitative thresholds. The new guidance is effective for public business entities for annual periods beginning after December 15, 2024. Early adoption is permitted. We are in the process of evaluating the impact of adopting this new guidance on our consolidated financial statement disclosures.

In November 2023, the FASB issued ASU No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures (or ASU 2023-07). ASU 2023-07 modifies the disclosure and presentation requirements of reportable segments and requires the disclosure of significant segment expenses that are regularly

provided to the chief operating decision maker and included within each reported measure of segment profit and loss. In addition, the new guidance enhances interim disclosure requirements, clarifies circumstances in which an entity can disclose multiple segment measures of profit or loss, provides new segment disclosure requirements for entities with a single reportable segment, and contains other disclosure requirements. ASU 2023-07 is effective for annual periods beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. We are in the process of evaluating the impact of adopting this new guidance on our consolidated financial statement disclosures.

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Revenue from Contracts with Customers

3 Months Ended

Mar. 31, 2024

Revenue from Contract with Customer [Abstract]

Revenue from Contracts with Customers

2. Revenue from Contracts with Customers

Our contracts with customers provide for an offshore drilling rig and drilling services on a dayrate contract basis. The integrated services provided under our contracts primarily include (i) provision of an offshore drilling rig, the work crew and supplies of equipment and services necessary to operate the rig, (ii) mobilization and demobilization of the rig to and from the drill site and (iii) performance of rig preparation activities and/or modifications required for each contract.

We account for the integrated services provided within our drilling contracts as a single performance obligation satisfied over time, comprised of a series of distinct time increments in which we provide drilling services. The total transaction price is recognized for each drilling contract by estimating both fixed and variable consideration expected to be earned over the contract term.

Revenues Related to Managed Rigs

In 2021, we entered into an arrangement with an offshore drilling company whereby we would provide management and marketing services (or the MMSA) for certain of their rigs. The MMSA provided for (i) a daily fixed fee, based on status of the drilling rig, (ii) marketing fees based on a percentage of the earned dayrate of a drilling contract secured by us on behalf of the rig owner, (iii) a variable management fee and (iv) reimbursement of direct cost incurred. The fixed and variable fees were recognized in “Contract drilling” revenue in our unaudited Condensed Consolidated Statements of Operations. Revenue related to the reimbursement of expenses incurred and billed to the rig owner were recorded as “Revenues related to reimbursable expenses” in our unaudited Condensed Consolidated Statements of Operations.

We may enter into certain drilling contracts directly with a customer. We are considered principal or agent of these transactions and recognize revenue under the terms of the contract. Such amounts are reported as “Contract drilling” revenue in our unaudited Condensed Consolidated Statements of Operations. In addition, we charter the related drilling rig from the rig owner to satisfy our performance obligation under the contract. We have determined that the arrangement to charter the rig is an operating lease, and the related charter fee has been reported as lease expense within "Contract drilling, excluding depreciation" in our unaudited Condensed Consolidated Statements of Operations.

The marketing arrangements for each of the managed rigs, the West Auriga and the West Vela, were terminated in 2023. Additionally, the management and charter agreements for the West Auriga were terminated in the first quarter of 2024, and the rig was returned to its owner at the end of February 2024. We also received notice of termination of the management agreement for the West Vela in April 2024, which will become effective after 90 days. The termination of the management agreement will have no effect on the bareboat charter agreement for the West Vela, which provides that it will continue in accordance with its terms until the completion of the rig’s existing drilling contract and any option periods.

Contract Balances

The following table provides information about receivables, contract assets and contract liabilities related to our contracts with customers (in thousands):

	March 31,			December 31,
	2024			2023
Trade receivables	$	206,830		$	253,367
Current contract assets (1)		2,565			2,575
Current contract liabilities (deferred revenue) (1)		(17,833	)		(12,634	)
Noncurrent contract liabilities (deferred revenue) (1)		(3,613	)		(3,947	)

(1)Contract assets and contract liabilities may reflect balances which have been netted together on a contract basis. Net current contract asset and liability balances are included in “Prepaid expenses and other current assets” and “Accrued liabilities,” respectively, and net noncurrent contract liability balances are included in “Other liabilities” in our unaudited Condensed Consolidated Balance Sheets.

Changes in the contract assets and the contract liabilities balances during the period are as follows (in thousands):

	Contract			Contract
	Assets			Liabilities
Balance as of January 1, 2024	$	2,575		$	(16,581	)
Decrease due to amortization of revenue included in the beginning contract liability balance		—			3,185
Increase due to cash received, excluding amounts recognized as revenue during the period		—			(8,050	)
Increase due to revenue recognized during the period but contingent on future performance		391			—
Decrease due to transfer to receivables during the period		(323	)		—
Adjustments		(78	)		—
Balance as of March 31, 2024	$	2,565		$	(21,446	)

Transaction Price Allocated to Remaining Performance Obligations

The following table reflects revenue expected to be recognized in the future related to unsatisfied performance obligations as of March 31, 2024 (in thousands):

	For the Year Ending December 31,
	2024 (1)			2025			2026			2027			Total
Mobilization and contract preparation revenue	$	(4,317	)	$	(1,365	)	$	(1,337	)	$	(1,271	)	$	(8,290	)
Capital modification revenue		(2,954	)		(142	)		—			—			(3,096	)
Blended rate/other revenue		(10,060	)		—			—			—			(10,060	)
Total	$	(17,331	)	$	(1,507	)	$	(1,337	)	$	(1,271	)	$	(21,446	)

(1)Represents the nine-month period beginning April 1, 2024.

The revenue included above consists of expected fixed mobilization and upgrade revenue for both wholly and partially unsatisfied performance obligations, as well as expected variable mobilization and upgrade revenue for partially unsatisfied performance obligations, which has been estimated for purposes of allocating across the entire corresponding performance obligations. The actual timing of recognition of such amounts may vary due to factors outside of our control. We have applied the disclosure practical expedient in FASB ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), and its related amendments and have excluded estimated variable consideration related to wholly unsatisfied performance obligations or to distinct future time increments within our contracts, including dayrate revenue.

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Supplemental Financial Information

3 Months Ended

Mar. 31, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Supplemental Financial Information

3. Supplemental Financial Information

Unaudited Condensed Consolidated Balance Sheets Information

Accounts receivable, net of allowance for credit losses, consist of the following (in thousands):

	March 31,			December 31,
	2024			2023
Trade receivables	$	206,830		$	253,367
Insurance claim receivable (1)		11,688			—
Value added tax receivables		6,167			5,256
Related party receivables		75			155
Other		894			1,346
		225,654			260,124
Allowance for credit losses (2)		(5,731	)		(5,801	)
Total	$	219,923		$	254,323

(1)See Note 8 “Ocean GreatWhite Insurance Claim” for a discussion of an insurance claim associated with an equipment incident on one of our rigs.

(2)The allowance for credit losses at March 31, 2024 and December 31, 2023 represents our estimate of credit losses associated with our “Trade receivables” and “Current contract assets.” See Note 4 “Financial Instruments and Fair Value Disclosures” for a discussion of our concentrations of credit risk and allowance for credit losses.

Prepaid expenses and other current assets consist of the following (in thousands):

	March 31,		December 31,
	2024		2023
Deferred contract costs	$	15,211	$	20,552
Collateral deposit		11,857		11,857
Prepaid taxes		7,526		10,868
Rig spare parts and supplies		6,981		4,694
Current contract assets		2,565		2,575
Prepaid insurance		2,117		3,437
Prepaid rig costs		1,978		3,668
Software maintenance agreements and subscriptions		1,650		1,408
Deferred survey costs		1,386		1,418
Other		6,131		2,935
Total	$	57,402	$	63,412

Accrued liabilities consist of the following (in thousands):

	March 31,		December 31,
	2024		2023
Rig operating costs	$	47,316	$	42,893
Contract advances		33,225		63,618
Payroll and benefits		26,260		35,215
Interest payable		24,691		13,013
Deferred revenue		17,833		12,634
Personal injury and other claims		6,217		7,391
Current operating lease liability		8,171		8,436
Accrued capital project/upgrade costs		8,059		10,766
Deposit for equipment sale		5,902		1,977
Shorebase and administrative costs		4,967		5,699
Other		2,491		1,694
Total	$	185,132	$	203,336

Unaudited Condensed Consolidated Statements of Cash Flows Information

Noncash operating, investing and financing activities excluded from the unaudited Condensed Consolidated Statements of Cash Flows and other supplemental cash flow information are as follows (in thousands):

	Three Months Ended March 31,
	2024		2023
Accrued but unpaid capital expenditures at period end	$	8,059	$	11,697
Common stock withheld for payroll tax obligations (1)		661		134
Cash interest payments		—		7,488
Cash income taxes paid, net of (refunds):
Foreign		1,851		1,258
U.S. Federal		130		(8,966	)

(1)Represents the cost of 302,833 and 10,946 shares of common stock withheld to satisfy payroll tax obligations incurred as a result of the vesting of restricted stock and restricted stock units during the three-month periods ended March 31, 2024 and March 31, 2023, respectively, which is presented as a deduction from stockholders’ equity in “Treasury stock” in our unaudited Condensed Consolidated Balance Sheets.

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Financial Instruments and Fair Value Disclosures

3 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

Financial Instruments and Fair Value Disclosures

4. Financial Instruments and Fair Value Disclosures

Concentrations of Credit Risk and Allowance for Credit Losses

Our credit risk arises primarily from trade receivables. The market for our services is the offshore oil and gas industry, and our customer base consists primarily of major and independent oil and gas companies, as well as government-owned oil companies. At March 31, 2024, we believed that we had potentially significant concentrations of credit risk due to the number of rigs we had contracted and our limited number of customers, as some of our customers have contracted for multiple rigs.

In general, before working for a customer with whom we have not had a prior business relationship and/or whose financial stability may be uncertain, we perform a credit review on that customer, including a review of its credit ratings and financial statements. Based on our credit review, we may require that the customer have a bank issue a letter of credit on its behalf, prepay for the services in advance or provide other credit enhancements. We currently have one customer for which prepayments are required and full payment is due prior to commencement of the contract in the second half of 2024. At March 31, 2024, no amounts were owed by this customer.

Pursuant to FASB ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments and its related amendments (or ASU 2016-13), we have reviewed our historical credit loss experience over a look-back period of ten years, which we deem to be representative of both up-turns and down-cycles in the offshore drilling industry. Based on this review, we developed a credit loss factor using a weighted-average ratio of our actual credit losses to revenues during the look-back period. We also considered current and future anticipated economic conditions in determining our credit loss factor, including crude oil prices and liquidity of credit markets. In applying the requirements of ASU 2016-13 and its related amendments (or collectively, CECL), we determined that it would be appropriate to segregate our trade receivables into three credit loss risk pools based on customer credit ratings, each of which represents a tier of increasing credit risk. We calculated a credit loss factor based on historical loss rate information and applied a multiple of our credit loss factor to each of these risk pools, considering the impact of current and future economic information and the level of risk associated with these pools, to calculate our current estimate of credit losses. Trade receivables that are fully covered by allowances for credit losses are excluded from these risk pools for purposes of calculating our current estimate of credit losses.

At March 31, 2024, $8.5 million in trade receivables were considered past due by 30 days or more, of which $5.4 million have been fully reserved. The remaining $3.1 million were less than a year past due and considered collectible. For purposes of calculating our current estimate of credit losses at March 31, 2024 and December 31, 2023, all trade receivables, except for those fully reserved, were deemed to be in a single risk pool based on their credit ratings at each respective period. Our total allowance for credit losses was $5.7 million and $5.8 million at March 31, 2024 and December 31, 2023, respectively, including $0.3 million for each period related to our current estimate of credit losses

under CECL. See Note 3 “Supplemental Financial Information — Unaudited Condensed Consolidated Balance Sheets Information.”

Fair Values

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The fair value hierarchy prescribed by GAAP requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value.

There are three levels of inputs that may be used to measure fair value:

Level 1	Quoted prices for identical instruments in active markets.
Level 2	Quoted market prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets.
Level 3	Valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable. Level 3 assets and liabilities generally include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation or for which there is a lack of transparency as to the inputs used.

Certain of our assets and liabilities are required to be measured at fair value on a recurring basis in accordance with GAAP. In addition, certain assets and liabilities may be recorded at fair value on a nonrecurring basis. Generally, we record assets at fair value on a nonrecurring basis as a result of impairment charges.

Assets and liabilities measured at fair value are summarized below (in thousands).

	March 31, 2024
	Fair Value Measurements Using
	Level 1			Level 2		Level 3		Assets (Liabilities) at Fair Value			Total Losses for Three Months Ended (2)
Recurring fair value measurements:
Short-term investments (1)	$	63,880		$	—	$	—	$	63,880		$	—
Liability-classified Director restricted stock units (2)	$	(1,326	)	$	—	$	—	$	(1,326	)	$	(62	)

	December 31, 2023
	Fair Value Measurements Using
	Level 1			Level 2		Level 3		Assets (Liabilities) at Fair Value			Total Losses for Year Ended (2)
Recurring fair value measurements:
Short-term investments (1)	$	92,308		$	—	$	—	$	92,308		$	—
Liability-classified Director restricted stock units (2)	$	(1,258	)	$	—	$	—	$	(1,258	)	$	(252	)

(1)Represents short-term investments, with original maturities of three months or less, in debt securities classified as available for sale.

(2)The fair value of restricted stock units was estimated based on the quoted market price of our common stock at the respective balance sheet date. The total loss for the period or year includes an increase in stock

compensation expense due to the “marking-to-market” of liability-classified restricted stock units granted to our non-employee directors on a recurring basis.

We believe that the carrying amounts of our other financial assets and liabilities (excluding our long-term debt), which are not measured at fair value in our unaudited Condensed Consolidated Balance Sheets, approximate fair value based on the following assumptions:

•Cash and cash equivalents and restricted cash – The carrying amounts approximate fair value because of the short maturity of these instruments.

•Accounts receivable and accounts payable – The carrying amounts approximate fair value based on the nature of the instruments.

Our long-term debt is not measured at fair value on a recurring basis; however, under the GAAP fair value hierarchy, such indebtedness would be considered Level 2 liabilities. The fair value of the instrument was derived using valuation specialists at March 31, 2024 and December 31, 2023.

Fair values and related carrying values of our Second Lien Notes (as defined below in Note 6 “Long-Term Debt”) are shown below (in millions).

	March 31, 2024				December 31, 2023
	Fair Value		Carrying Value		Fair Value		Carrying Value
Second Lien Notes	$	580.7	$	550.0	$	562.6	$	550.0

We have estimated the fair value amounts by using appropriate valuation methodologies and information available to management. Certain inputs and value drivers are observed and obtained in active markets from similar assets or liabilities while developing these estimates, and accordingly, no assurance can be given that the estimated values are indicative of the amounts that would be realized in a free market exchange.

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Drilling and Other Property and Equipment

3 Months Ended

Mar. 31, 2024

Property, Plant and Equipment [Abstract]

Drilling and Other Property and Equipment

5. Drilling and Other Property and Equipment

Cost and accumulated depreciation of drilling and other property and equipment are summarized as follows (in thousands):

	March 31,			December 31,
	2024			2023
Drilling rigs and equipment	$	1,272,564		$	1,244,798
Finance lease right of use asset		174,571			174,571
Land and buildings		10,064			10,040
Office equipment and other		5,317			5,180
Cost		1,462,516			1,434,589
Less: accumulated depreciation		(309,476	)		(278,221	)
Drilling and other property and equipment, net	$	1,153,040		$	1,156,368

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Long-Term Debt

3 Months Ended

Mar. 31, 2024

Debt Disclosure [Abstract]

Long-Term Debt

6. Long-Term Debt

At March 31, 2024 and December 31, 2023, the carrying value of our long-term debt, net of unamortized discount, premium and debt issuance costs, was comprised as follows (in thousands):

	March 31,		December 31,
	2024		2023
$550 Million Senior Secured Second Lien Notes due 2030	$	534,009	$	533,514

Second Lien Notes

On September 21, 2023, Diamond Foreign Asset Company and Diamond Finance, LLC (collectively referred to as the Issuers) issued $550.0 million aggregate principal amount of 8.5% Senior Secured Second Lien Notes due October 2030 (or the Second Lien Notes) with interest payable semi-annually in arrears on April 1 and October 1 of

each year, beginning on April 1, 2024. The Second Lien Notes are fully and unconditionally guaranteed, jointly and severally, on a senior secured basis by Diamond Offshore Drilling, Inc. (or DODI) and each of its existing restricted subsidiaries (other than the Issuers) and by certain of DODI’s future restricted subsidiaries (other than the Issuers).

The Second Lien Notes obligate DODI and its specified subsidiaries to comply with an indenture dated as of September 21, 2023 (or the Indenture) entered into by the Issuers, DODI and certain of its subsidiaries named therein and HSBC Bank USA, National Association. The Indenture contains covenants that, among other things, restrict DODI’s ability and the ability of certain of its subsidiaries to: (i) incur additional debt and issue certain preferred stock; (ii) incur or create liens; (iii) make certain dividends, distributions, investments and other restricted payments; (iv) sell or otherwise dispose of certain assets; (v) engage in certain transactions with affiliates; and (vi) merge, consolidate, amalgamate or sell, transfer, lease or otherwise dispose of all or substantially all of DODI’s assets. These covenants are subject to important exceptions and qualifications.

The Second Lien Notes were valued at par at issuance and were presented net of unamortized debt issuance costs of $16.0 million and $16.5 million, at March 31, 2024 and December 31, 2023, respectively. At March 31, 2024, the effective interest rate on the Second Lien Notes was 9.10%.

Revolving Credit Agreement

Our revolving credit agreement provides for a $300.0 million senior secured revolving credit facility (or RCF), which will mature on April 22, 2026. Borrowings under the RCF may be used to finance capital expenditures, pay fees, commissions and expenses in connection with the loan transactions, and for working capital and other general corporate purposes. Availability of borrowings under the RCF is subject to the satisfaction of certain conditions, including restrictions on borrowings if, after giving effect to any such borrowings and the application of the proceeds thereof, (i) the aggregate amount of Available Cash (as defined in the RCF) would exceed $125.0 million, (ii) the RCF Collateral Coverage Ratio (as defined in the RCF) would be less than 2.00 to 1.00 or (iii) the Total Collateral Coverage Ratio (as defined in the RCF) would be less than 1.30 to 1.00.

At March 31, 2024 and May 6, 2024, we had no borrowings outstanding under the RCF and had utilized $1.9 million of available borrowing capacity for the issuance of a letter of credit. The outstanding letter of credit will expire on maturity in May 2024, unless replaced. As of May 6, 2024, approximately $298.1 million was available for borrowings under the RCF subject to its terms and conditions.

There is no capacity for the issuance of new letters of credit under the RCF, but the RCF permits us to obtain up to $50.0 million in letters of credit outside the RCF. We have obtained a separate $25.0 million letter of credit facility; however, letters of credit thereunder must be cash collateralized.

At March 31, 2024, we were in compliance with all covenants under the Second Lien Notes and the RCF.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2024

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

7. Commitments and Contingencies

Various claims have been filed against us in the ordinary course of business, including claims by offshore workers alleging personal injuries. With respect to each claim or exposure, we have made an assessment, in accordance with GAAP, of the probability that the resolution of the matter would ultimately result in a loss. When we determine that an unfavorable resolution of a matter is probable and such amount of loss can be determined, we record a liability for the amount of the estimated loss at the time that both of these criteria are met. Our management believes that we have recorded adequate accruals for any liabilities that may reasonably be expected to result from these claims.

Non-Income Tax and Related Claims. We have received assessments related to, or otherwise have exposure to, non-income tax items such as sales-and-use tax, value-added tax, ad valorem tax, custom duties, and other similar taxes in various taxing jurisdictions. We have determined that we have a probable loss for certain of these taxes and the related penalties and interest and, accordingly, have recorded a $12.4 million and $12.7 million liability at March 31, 2024 and December 31, 2023, respectively, in “Other liabilities” in our unaudited Condensed Consolidated Balance Sheets. We intend to defend these matters vigorously; however, the ultimate outcome of these assessments and exposures could result in additional taxes, interest and penalties for which the fully assessed amounts would have a material adverse effect on our financial condition, results of operations and cash flows.

Other Litigation. We have been named in various other claims, lawsuits or threatened actions that are incidental to the ordinary course of our business. We intend to defend these matters vigorously; however, litigation is inherently unpredictable, and the ultimate outcome or effect of any claim, lawsuit or action cannot be predicted with certainty. As a result, there can be no assurance as to the ultimate outcome of any litigation matter. Any claims against us, whether meritorious or not, could cause us to incur significant costs and expenses and require significant amounts of management and operational time and resources. In the opinion of our management, no such pending or known threatened claims, actions or proceedings against us are expected to have a material adverse effect on our consolidated financial position, results of operations or cash flows.

Personal Injury Claims. Under our current insurance policies, which renewed effective May 1, 2024, we generally self-insure $1.0 million to $2.5 million per occurrence, depending on jurisdiction, with respect to personal injury claims not related to named windstorms in the U.S. Gulf of Mexico, which primarily result from Jones Act liability in the U.S. Gulf of Mexico. Depending on the nature, severity, and frequency of claims that might arise during the policy year, if the aggregate level of claims exceed certain thresholds, we may self-insure up to $100.0 million for each subsequent occurrence.

The Jones Act is a federal law that permits seamen to seek compensation for certain injuries during the course of their employment on a vessel and governs the liability of vessel operators and marine employers for the work-related injury or death of an employee. We engage outside consultants to assist us in estimating our aggregate liability for personal injury claims based on our historical losses and utilizing various actuarial models. We allocate a portion of the aggregate liability to “Accrued liabilities” based on an estimate of claims expected to be paid within the next twelve months with the residual recorded as “Other liabilities.” At March 31, 2024, our estimated liability for personal injury claims was $11.8 million, of which $6.2 million and $5.6 million were recorded in “Accrued liabilities” and “Other liabilities,” respectively, in our unaudited Condensed Consolidated Balance Sheets. At December 31, 2023, our estimated liability for personal injury claims was $14.6 million, of which $7.4 million and $7.2 million were recorded in “Accrued liabilities” and “Other liabilities,” respectively, in our unaudited Condensed Consolidated Balance Sheets. The eventual settlement or adjudication of these claims could differ materially from our estimated amounts due to uncertainties such as:

•the severity of personal injuries claimed;

•significant changes in the volume of personal injury claims;

•the unpredictability of legal jurisdictions where the claims will ultimately be litigated;

•inconsistent court decisions; and

•the risks and lack of predictability inherent in personal injury litigation.

Purchase Obligations. At March 31, 2024, we had no purchase obligations for major rig upgrades or any other significant obligations, except for those related to our direct rig operations, which arise during the normal course of business.

Services Agreement. In February 2016, we 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 (or 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 $25.6 million annually. Total future commitments are projected to be $88.1 million in the aggregate over the remaining term of the agreement, including a $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.

In addition, we lease Well Control Equipment for our drillships under ten-year finance leases that commenced in 2016 that also include an option to purchase the leased equipment at the end of the respective lease term.

Letters of Credit and Other. As of March 31, 2024, an aggregate of $14.0 million in bonds and letters of credit had been issued on our behalf in connection with certain customs, tax assessment and tenant security deposit requirements. Of this amount, approximately $12.1 million had been cash collateralized as of March 31, 2024. An additional $1.9 million was collateralized by a letter of credit issued under our RCF, which cannot require additional collateral except in events of default, or until its maturity in May 2024, if not replaced.

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Ocean GreatWhite Insurance Claim

3 Months Ended

Mar. 31, 2024

Insurance [Abstract]

Ocean GreatWhite Insurance Claim

8. Ocean GreatWhite Insurance Claim

On February 1, 2024, the Ocean GreatWhite reported an equipment incident while located in the North Sea west of the Shetland Islands. The rig’s lower marine riser package (or LMRP) and deployed riser string unintentionally separated from the rig at the slip joint tensioner ring, and the LMRP and riser dropped to the seabed. Since the incident, we have been working closely with our customer and local authorities in response and have pursued efforts to recover the equipment and replace missing or damaged equipment. We have safely recovered the LMRP from the seabed and are in a repair facility in Kishorn port, where repairs to the LMRP and any related work are underway.

As of the date of this report, $19.1 million of incremental recovery and repair and maintenance costs have been incurred, as well as $2.6 million in capital expenditures. At March 31, 2024, we had retired assets with an aggregate net book value of $3.3 million. We anticipate that the repairs and equipment replacement will be covered by our hull and machinery insurance policy and that all incremental costs, less our $10.0 million deductible, will be reimbursable under that policy. At March 31, 2024, we had recorded an insurance receivable in the amount of $11.7 million for the aggregate expenditures, less the deductible, as of that date. However, we cannot fully predict the extent of such insurance coverage or the timing of such claims. We had not received any proceeds from insurance as of March 31, 2024. In addition, we will be required to pay an additional loss premium of up to 3.5% of net insurance proceeds received, payable after the claim is closed and all proceeds known.

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Earnings Per Share

3 Months Ended

Mar. 31, 2024

Earnings Per Share [Abstract]

Earnings Per Share

9. Earnings Per Share

We compute basic earnings per share by dividing net income available to holders of our common stock by the weighted-average number of shares of our common stock outstanding during the period. Diluted earnings per share reflects the potential dilution that could occur if securities or other contracts to issue our common stock (common stock equivalents) were exercised or converted into common stock. Basic and diluted earnings per share (or EPS) was calculated in accordance with the treasury stock method, and includes all potentially dilutive stock equivalents, including warrants, restricted stock unit awards and performance stock unit awards.

A reconciliation of the numerators and denominators of our basic and diluted EPS computations is summarized as follows (in thousands).

	Three Months Ended March 31,
	2024		2023
Net income – basic and diluted (numerator)	$	11,612	$	7,229
Weighted average shares – basic (denominator):		102,440		101,331
Dilutive effect of stock-based awards		2,300		2,605
Weighted average shares including conversions – diluted (denominator)		104,740		103,936

The computation of EPS for the three-month periods ended March 31, 2024 and March 31, 2023 excluded non-vested stock-based awards of 283,981 shares and 349,784 shares, respectively, as the inclusion of such would have been antidilutive for the periods.

As of March 31, 2024, we had 7.5 million stock warrants outstanding (or Warrants) to purchase shares of our common stock that were exercisable for one share of common stock per Warrant at an exercise price of $29.22 (subject to adjustment). The Warrants are exercisable until they expire on April 23, 2026. The presumed exercise of these Warrants into shares of our common stock would have an antidilutive effect as the exercise price per warrant exceeded the average price of our common stock and they have been excluded from the computation of EPS for all periods presented.

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Segments and Geographic Area Analysis

3 Months Ended

Mar. 31, 2024

Segment Reporting [Abstract]

Segments and Geographic Area Analysis

10. Segments and Geographic Area Analysis

We provide contract drilling services with different types of offshore drilling rigs and also provide such services in many geographic locations. However, we have aggregated these operations into one reportable segment based on the similarity of economic characteristics due to the nature of the revenue-earning process as it relates to the offshore drilling industry over the operating lives of our drilling rigs and other qualitative factors such as (i) the nature of services provided (contract drilling), (ii) similarity in operations (interchangeable rig crews and shared management and marketing, engineering, marine and maintenance support), (iii) similar regulatory environment (depending on customer and/or location) and (iv) similar contractual arrangements with customers.

Our drilling rigs are highly mobile and may be moved to other markets throughout the world in response to market conditions or customer needs. At March 31, 2024, our active drilling rigs were located offshore four countries in addition to the United States. Revenues by geographic area are presented by attributing revenues to the individual country where the services were performed during the periods presented, which may not be indicative of where the rigs are currently located.

The following tables provide information about disaggregated revenue by country (in thousands):

	Three Months Ended March 31, 2024
	Total  Contract  Drilling  Revenues		Revenues  Related to  Reimbursable  Expenses		Total
United States	$	146,475	$	7,328	$	153,803
United Kingdom		32,568		4,233		36,801
Australia		27,360		2,463		29,823
Brazil		26,570		—		26,570
Senegal		25,797		1,816		27,613
Total	$	258,770	$	15,840	$	274,610

	Three Months Ended March 31, 2023
	Total  Contract  Drilling  Revenues		Revenues  Related to  Reimbursable  Expenses		Total
United States	$	104,581	$	12,557	$	117,138
United Kingdom		17,702		1,060		18,762
Australia		19,309		840		20,149
Brazil		20,660		—		20,660
Senegal		52,131		3,181		55,312
Total	$	214,383	$	17,638	$	232,021

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General Information (Policies)

3 Months Ended

Mar. 31, 2024

Accounting Policies [Abstract]

Use of Estimates in the Preparation of Financial Statements

Use of Estimates in the Preparation of Financial Statements

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amount of revenues and expenses during the reporting period. Actual results could differ from those estimated.

Restricted Cash

Restricted Cash

We maintain a restricted cash bank account which is subject to restrictions pursuant to a management services agreement with an offshore drilling company. See Note 2 “Revenue from Contracts with Customers.”

We classify such restricted cash accounts in current assets if the restrictions are expected to expire or otherwise be resolved within one year or if such funds are considered to offset current liabilities. At March 31, 2024 and December 31, 2023, our restricted cash was considered to be current and was recorded in “Restricted cash” in our unaudited Condensed Consolidated Balance Sheets.

Assets Held for Sale

Asset Held for Sale

We reported the $1.0 million carrying value of the Ocean Monarch as “Asset held for sale” in our unaudited Condensed Consolidated Balance Sheets at March 31, 2024. The rig was sold in April 2024 for aggregate proceeds of approximately $7.5 million.

Accounting Principles Not Yet Adopted

Accounting Principles Not Yet Adopted

In December 2023, the Financial Accounting Standards Board (or FASB) issued Accounting Standards Update (or ASU) No. 2023-09, Income Tax (Topic 740): Improvements to Income Tax Disclosures (or ASU 2023-09). ASU 2023-09 requires business entities on an annual basis to (i) disclose specific categories in the rate reconciliation and (ii) provide additional information for reconciling items that meet certain quantitative thresholds. The new guidance is effective for public business entities for annual periods beginning after December 15, 2024. Early adoption is permitted. We are in the process of evaluating the impact of adopting this new guidance on our consolidated financial statement disclosures.

In November 2023, the FASB issued ASU No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures (or ASU 2023-07). ASU 2023-07 modifies the disclosure and presentation requirements of reportable segments and requires the disclosure of significant segment expenses that are regularly

provided to the chief operating decision maker and included within each reported measure of segment profit and loss. In addition, the new guidance enhances interim disclosure requirements, clarifies circumstances in which an entity can disclose multiple segment measures of profit or loss, provides new segment disclosure requirements for entities with a single reportable segment, and contains other disclosure requirements. ASU 2023-07 is effective for annual periods beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. We are in the process of evaluating the impact of adopting this new guidance on our consolidated financial statement disclosures.

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Revenue from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2024

Revenue from Contract with Customer [Abstract]

Summary of Information about Receivables, Contract Assets and Contract Liabilities from Contracts with Customers

The following table provides information about receivables, contract assets and contract liabilities related to our contracts with customers (in thousands):

	March 31,			December 31,
	2024			2023
Trade receivables	$	206,830		$	253,367
Current contract assets (1)		2,565			2,575
Current contract liabilities (deferred revenue) (1)		(17,833	)		(12,634	)
Noncurrent contract liabilities (deferred revenue) (1)		(3,613	)		(3,947	)

(1)Contract assets and contract liabilities may reflect balances which have been netted together on a contract basis. Net current contract asset and liability balances are included in “Prepaid expenses and other current assets” and “Accrued liabilities,” respectively, and net noncurrent contract liability balances are included in “Other liabilities” in our unaudited Condensed Consolidated Balance Sheets.

Summary of Changes in Contract Assets and Contract Liabilities Balances

Changes in the contract assets and the contract liabilities balances during the period are as follows (in thousands):

	Contract			Contract
	Assets			Liabilities
Balance as of January 1, 2024	$	2,575		$	(16,581	)
Decrease due to amortization of revenue included in the beginning contract liability balance		—			3,185
Increase due to cash received, excluding amounts recognized as revenue during the period		—			(8,050	)
Increase due to revenue recognized during the period but contingent on future performance		391			—
Decrease due to transfer to receivables during the period		(323	)		—
Adjustments		(78	)		—
Balance as of March 31, 2024	$	2,565		$	(21,446	)

Summary of Specified Types Revenue Expected to be Recognized in Future Related to Unsatisfied Performance Obligations

The following table reflects revenue expected to be recognized in the future related to unsatisfied performance obligations as of March 31, 2024 (in thousands):

	For the Year Ending December 31,
	2024 (1)			2025			2026			2027			Total
Mobilization and contract preparation revenue	$	(4,317	)	$	(1,365	)	$	(1,337	)	$	(1,271	)	$	(8,290	)
Capital modification revenue		(2,954	)		(142	)		—			—			(3,096	)
Blended rate/other revenue		(10,060	)		—			—			—			(10,060	)
Total	$	(17,331	)	$	(1,507	)	$	(1,337	)	$	(1,271	)	$	(21,446	)

(1)Represents the nine-month period beginning April 1, 2024.

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Supplemental Financial Information (Tables)

3 Months Ended

Mar. 31, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Accounts Receivable, Net of Allowance for Credit Losses

Accounts receivable, net of allowance for credit losses, consist of the following (in thousands):

	March 31,			December 31,
	2024			2023
Trade receivables	$	206,830		$	253,367
Insurance claim receivable (1)		11,688			—
Value added tax receivables		6,167			5,256
Related party receivables		75			155
Other		894			1,346
		225,654			260,124
Allowance for credit losses (2)		(5,731	)		(5,801	)
Total	$	219,923		$	254,323

(1)See Note 8 “Ocean GreatWhite Insurance Claim” for a discussion of an insurance claim associated with an equipment incident on one of our rigs.

(2)The allowance for credit losses at March 31, 2024 and December 31, 2023 represents our estimate of credit losses associated with our “Trade receivables” and “Current contract assets.” See Note 4 “Financial Instruments and Fair Value Disclosures” for a discussion of our concentrations of credit risk and allowance for credit losses.

Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consist of the following (in thousands):

	March 31,		December 31,
	2024		2023
Deferred contract costs	$	15,211	$	20,552
Collateral deposit		11,857		11,857
Prepaid taxes		7,526		10,868
Rig spare parts and supplies		6,981		4,694
Current contract assets		2,565		2,575
Prepaid insurance		2,117		3,437
Prepaid rig costs		1,978		3,668
Software maintenance agreements and subscriptions		1,650		1,408
Deferred survey costs		1,386		1,418
Other		6,131		2,935
Total	$	57,402	$	63,412

Accrued Liabilities

Accrued liabilities consist of the following (in thousands):

	March 31,		December 31,
	2024		2023
Rig operating costs	$	47,316	$	42,893
Contract advances		33,225		63,618
Payroll and benefits		26,260		35,215
Interest payable		24,691		13,013
Deferred revenue		17,833		12,634
Personal injury and other claims		6,217		7,391
Current operating lease liability		8,171		8,436
Accrued capital project/upgrade costs		8,059		10,766
Deposit for equipment sale		5,902		1,977
Shorebase and administrative costs		4,967		5,699
Other		2,491		1,694
Total	$	185,132	$	203,336

Noncash Operating, Investing and Financing Activities

Noncash operating, investing and financing activities excluded from the unaudited Condensed Consolidated Statements of Cash Flows and other supplemental cash flow information are as follows (in thousands):

	Three Months Ended March 31,
	2024		2023
Accrued but unpaid capital expenditures at period end	$	8,059	$	11,697
Common stock withheld for payroll tax obligations (1)		661		134
Cash interest payments		—		7,488
Cash income taxes paid, net of (refunds):
Foreign		1,851		1,258
U.S. Federal		130		(8,966	)

(1)Represents the cost of 302,833 and 10,946 shares of common stock withheld to satisfy payroll tax obligations incurred as a result of the vesting of restricted stock and restricted stock units during the three-month periods ended March 31, 2024 and March 31, 2023, respectively, which is presented as a deduction from stockholders’ equity in “Treasury stock” in our unaudited Condensed Consolidated Balance Sheets.

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Financial Instruments and Fair Value Disclosures (Tables)

3 Months Ended

Mar. 31, 2024

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets and Liabilities Measured at Fair Value on Recurring Basis

Assets and liabilities measured at fair value are summarized below (in thousands).

	March 31, 2024
	Fair Value Measurements Using
	Level 1			Level 2		Level 3		Assets (Liabilities) at Fair Value			Total Losses for Three Months Ended (2)
Recurring fair value measurements:
Short-term investments (1)	$	63,880		$	—	$	—	$	63,880		$	—
Liability-classified Director restricted stock units (2)	$	(1,326	)	$	—	$	—	$	(1,326	)	$	(62	)

	December 31, 2023
	Fair Value Measurements Using
	Level 1			Level 2		Level 3		Assets (Liabilities) at Fair Value			Total Losses for Year Ended (2)
Recurring fair value measurements:
Short-term investments (1)	$	92,308		$	—	$	—	$	92,308		$	—
Liability-classified Director restricted stock units (2)	$	(1,258	)	$	—	$	—	$	(1,258	)	$	(252	)

(1)Represents short-term investments, with original maturities of three months or less, in debt securities classified as available for sale.

(2)The fair value of restricted stock units was estimated based on the quoted market price of our common stock at the respective balance sheet date. The total loss for the period or year includes an increase in stock

compensation expense due to the “marking-to-market” of liability-classified restricted stock units granted to our non-employee directors on a recurring basis.

Fair Values and Related Carrying Values of Our Debt Instruments

Fair values and related carrying values of our Second Lien Notes (as defined below in Note 6 “Long-Term Debt”) are shown below (in millions).

	March 31, 2024				December 31, 2023
	Fair Value		Carrying Value		Fair Value		Carrying Value
Second Lien Notes	$	580.7	$	550.0	$	562.6	$	550.0

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Drilling and Other Property and Equipment (Tables)

3 Months Ended

Mar. 31, 2024

Property, Plant and Equipment [Abstract]

Summary of Cost and Accumulated Depreciation of Drilling and Other Property and Equipment

Cost and accumulated depreciation of drilling and other property and equipment are summarized as follows (in thousands):

	March 31,			December 31,
	2024			2023
Drilling rigs and equipment	$	1,272,564		$	1,244,798
Finance lease right of use asset		174,571			174,571
Land and buildings		10,064			10,040
Office equipment and other		5,317			5,180
Cost		1,462,516			1,434,589
Less: accumulated depreciation		(309,476	)		(278,221	)
Drilling and other property and equipment, net	$	1,153,040		$	1,156,368

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Long-Term Debt (Tables)

3 Months Ended

Mar. 31, 2024

Debt Disclosure [Abstract]

Summary of Carrying Value of Long-term Debt, Net of Unamortized Discount, Premium and Debt Issuance Costs

At March 31, 2024 and December 31, 2023, the carrying value of our long-term debt, net of unamortized discount, premium and debt issuance costs, was comprised as follows (in thousands):

	March 31,		December 31,
	2024		2023
$550 Million Senior Secured Second Lien Notes due 2030	$	534,009	$	533,514

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Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2024

Earnings Per Share [Abstract]

Schedule of Reconciliation of Numerators and Denominators of Basic and Diluted EPS

A reconciliation of the numerators and denominators of our basic and diluted EPS computations is summarized as follows (in thousands).

	Three Months Ended March 31,
	2024		2023
Net income – basic and diluted (numerator)	$	11,612	$	7,229
Weighted average shares – basic (denominator):		102,440		101,331
Dilutive effect of stock-based awards		2,300		2,605
Weighted average shares including conversions – diluted (denominator)		104,740		103,936

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Segments and Geographic Area Analysis (Tables)

3 Months Ended

Mar. 31, 2024

Segment Reporting [Abstract]

Summary of Information About Disaggregated Revenue by Country

The following tables provide information about disaggregated revenue by country (in thousands):

	Three Months Ended March 31, 2024
	Total  Contract  Drilling  Revenues		Revenues  Related to  Reimbursable  Expenses		Total
United States	$	146,475	$	7,328	$	153,803
United Kingdom		32,568		4,233		36,801
Australia		27,360		2,463		29,823
Brazil		26,570		—		26,570
Senegal		25,797		1,816		27,613
Total	$	258,770	$	15,840	$	274,610

	Three Months Ended March 31, 2023
	Total  Contract  Drilling  Revenues		Revenues  Related to  Reimbursable  Expenses		Total
United States	$	104,581	$	12,557	$	117,138
United Kingdom		17,702		1,060		18,762
Australia		19,309		840		20,149
Brazil		20,660		—		20,660
Senegal		52,131		3,181		55,312
Total	$	214,383	$	17,638	$	232,021

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General Information - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended
	Apr. 01, 2024	Mar. 31, 2024
Restricted Cash And Cash Equivalents Items [Line Items]
Restricted cash, nature of restriction, description		We maintain a restricted cash bank account which is subject to restrictions pursuant to a management services agreement with an offshore drilling company.
Aggregate proceeds from asset held for sale	$ 7.5
Ocean Monarch [Member]
Restricted Cash And Cash Equivalents Items [Line Items]
Net book value of assets		$ 1.0

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Revenue from Contracts with Customers - Summary of Information about Receivables, Contract Assets and Contract Liabilities from Contracts with Customers (Detail) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Trade receivables		$ 206,830	$ 253,367
Current contract assets	[1]	2,565	2,575
Current contract liabilities (deferred revenue)	[1]	(17,833)	(12,634)
Noncurrent contract liabilities (deferred revenue)	[1]	$ (3,613)	$ (3,947)

[1] Contract assets and contract liabilities may reflect balances which have been netted together on a contract basis. Net current contract asset and liability balances are included in “Prepaid expenses and other current assets” and “Accrued liabilities,” respectively, and net noncurrent contract liability balances are included in “Other liabilities” in our unaudited Condensed Consolidated Balance Sheets.

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Revenue from Contracts with Customers - Summary of Changes in Contract Assets and Contract Liabilities Balances (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
Revenue from Contract with Customer [Abstract]
Contract assets, beginning of period	$ 2,575
Contract liabilities, beginning of period	(16,581)
Decrease due to amortization of revenue included in the beginning contract liability balance	3,185
Increase due to cash received, excluding amounts recognized as revenue during the period	(8,050)
Increase due to revenue recognized during the period but contingent on future performance	391
Decrease due to transfer to receivables during the period	(323)
Adjustments	(78)
Contract assets at end of period	2,565
Contract liabilities at end of period	$ (21,446)

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Revenue from Contracts with Customers - Summary of Specified Types of Revenue Expected to be Recognized in Future Related to Unsatisfied Performance Obligations (Detail) $ in Thousands	Mar. 31, 2024 USD ($)
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Revenue remaining performance obligation	$ (21,446)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-04-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	9 months
Revenue remaining performance obligation	$ (17,331)	[1]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	9 months
Revenue remaining performance obligation	$ (1,507)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-04-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	9 months
Revenue remaining performance obligation	$ (1,337)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-04-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	9 months
Revenue remaining performance obligation	$ (1,271)
Mobilization And Contract Preparation Revenue [Member]
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Revenue remaining performance obligation	(8,290)
Mobilization And Contract Preparation Revenue [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-04-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Revenue remaining performance obligation	(4,317)	[1]
Mobilization And Contract Preparation Revenue [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Revenue remaining performance obligation	(1,365)
Mobilization And Contract Preparation Revenue [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-04-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Revenue remaining performance obligation	(1,337)
Mobilization And Contract Preparation Revenue [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-04-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Revenue remaining performance obligation	(1,271)
Capital Modification Revenue [Member]
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Revenue remaining performance obligation	(3,096)
Capital Modification Revenue [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-04-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Revenue remaining performance obligation	(2,954)	[1]
Capital Modification Revenue [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Revenue remaining performance obligation	(142)
Blended rate/other revenue [Member]
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Revenue remaining performance obligation	(10,060)
Blended rate/other revenue [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-04-01
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]
Revenue remaining performance obligation	$ (10,060)	[1]

[1] Represents the nine-month period beginning April 1, 2024.

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Supplemental Financial Information - Accounts Receivable, Net of Allowance for Credit Losses (Detail) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Trade receivables		$ 206,830	$ 253,367
Insurance claim receivable	[1]	11,688	0
Value added tax receivables		6,167	5,256
Other		894	1,346
Receivables Gross Current, Total		225,654	260,124
Allowance for credit losses	[2]	(5,731)	(5,801)
Accounts receivable, net		219,923	254,323
Related Party [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Related party receivables		$ 75	$ 155

[1] See Note 8 “Ocean GreatWhite Insurance Claim” for a discussion of an insurance claim associated with an equipment incident on one of our rigs.

[2] The allowance for credit losses at March 31, 2024 and December 31, 2023 represents our estimate of credit losses associated with our “Trade receivables” and “Current contract assets.” See Note 4 “Financial Instruments and Fair Value Disclosures” for a discussion of our concentrations of credit risk and allowance for credit losses.

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Supplemental Financial Information - Prepaid Expenses and Other Current Assets (Detail) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred contract costs		$ 15,211	$ 20,552
Collateral deposit		11,857	11,857
Prepaid taxes		7,526	10,868
Rig spare parts and supplies		6,981	4,694
Current contract assets	[1]	2,565	2,575
Prepaid Insurance		2,117	3,437
Prepaid rig costs		1,978	3,668
Software maintenance agreements and subscriptions		1,650	1,408
Deferred survey costs		1,386	1,418
Other		6,131	2,935
Total		$ 57,402	$ 63,412

[1] Contract assets and contract liabilities may reflect balances which have been netted together on a contract basis. Net current contract asset and liability balances are included in “Prepaid expenses and other current assets” and “Accrued liabilities,” respectively, and net noncurrent contract liability balances are included in “Other liabilities” in our unaudited Condensed Consolidated Balance Sheets.

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Supplemental Financial Information - Accrued Liabilities (Detail) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Payables and Accruals [Abstract]
Rig operating costs		$ 47,316	$ 42,893
Contract advances		33,225	63,618
Payroll and benefits		26,260	35,215
Interest payable		24,691	13,013
Deferred revenue	[1]	17,833	12,634
Personal injury and other claims		6,217	7,391
Current operating lease liability		8,171	8,436
Accrued capital project/upgrade costs		8,059	10,766
Deposit for equipment sale		5,902	1,977
Shorebase and administrative costs		4,967	5,699
Other		2,491	1,694
Total		$ 185,132	$ 203,336

[1] Contract assets and contract liabilities may reflect balances which have been netted together on a contract basis. Net current contract asset and liability balances are included in “Prepaid expenses and other current assets” and “Accrued liabilities,” respectively, and net noncurrent contract liability balances are included in “Other liabilities” in our unaudited Condensed Consolidated Balance Sheets.

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Supplemental Financial Information - Noncash Operating, Investing and Financing Activities (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Condensed Financial Statements, Captions [Line Items]
Accrued but unpaid capital expenditures at period end	$ 8,059	$ 11,697
Common stock withheld for payroll tax obligations	661	134
Cash interest payments	0	7,488
Foreign [Member]
Cash income taxes paid, net of (refunds):
Cash income taxes paid, net of refunds	1,851	1,258
Domestic [Member]
Cash income taxes paid, net of (refunds):
Cash income taxes paid, net of refunds	$ 130	$ (8,966)

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Supplemental Financial Information - Noncash Operating, Investing and Financing Activities (Detail) (Parenthetical) - shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Restricted Stock [Member]
Condensed Financial Statements, Captions [Line Items]
Number of shares of common stock withheld	302,833	10,946

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Financial Instruments and Fair Value Disclosures - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
		Mar. 31, 2024	Dec. 31, 2023
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Trade receivables past due		$ 8,500
Trade receivables reserved for previous years		5,400
Trade receivables remaining past due		3,100
Estimate of credit losses		300	$ 300
Allowance for credit losses	[1]	$ 5,731	$ 5,801

[1] The allowance for credit losses at March 31, 2024 and December 31, 2023 represents our estimate of credit losses associated with our “Trade receivables” and “Current contract assets.” See Note 4 “Financial Instruments and Fair Value Disclosures” for a discussion of our concentrations of credit risk and allowance for credit losses.

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Financial Instruments and Fair Value Disclosures - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Costs and Expenses	Costs and Expenses
Recurring Fair Value Measurements [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Short-Term Investments	$ 63,880	$ 92,308
Director [Member] | Recurring Fair Value Measurements [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liability-classified Director restricted stock units	(1,326)	(1,258)
Total Losses	(62)	(252)
Level 1 [Member] | Recurring Fair Value Measurements [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Short-Term Investments	63,880	92,308
Level 1 [Member] | Director [Member] | Recurring Fair Value Measurements [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liability-classified Director restricted stock units	$ (1,326)	$ (1,258)

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Financial Instruments and Fair Value Disclosures - Fair Value and Related Carrying Values of Our Debt Instruments (Detail) - Second Lien Notes [Member] - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	$ 580.7	$ 562.6
Carrying Value	$ 550.0	$ 550.0

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Drilling and Other Property and Equipment - Summary of Cost and Accumulated Depreciation of Drilling and Other Property and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Property and equipment	$ 1,462,516	$ 1,434,589
Less: accumulated depreciation	(309,476)	(278,221)
Drilling and other property and equipment, net	1,153,040	1,156,368
Drilling Rigs and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	1,272,564	1,244,798
Finance Lease Right of Use Asset [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	174,571	174,571
Land and Buildings [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	10,064	10,040
Office Equipment and Other [Member]
Property, Plant and Equipment [Line Items]
Property and equipment	$ 5,317	$ 5,180

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Long-Term Debt - Second Lien Notes - Additional Information (Details) - Second Lien Notes [Member] - USD ($) $ in Millions		3 Months Ended	12 Months Ended
	Sep. 21, 2023	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Debt issuance costs		$ 16.0	$ 16.5
Borrowings effective interest rate		9.10%
Senior Notes [Member]
Debt Instrument [Line Items]
Aggregate principal amount	$ 550.0
Interest rate of senior notes	8.50%

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Long-Term Debt - Summary of Carrying Value of Long-term Debt, Net of Unamortized Discount, Premium and Debt Issuance Costs (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total Exit Debt, net	$ 534,009	$ 533,514
Second Lien Notes [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Total Exit Debt, net	$ 534,009	$ 533,514

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Long-Term Debt - Summary of Carrying Value of Long-term Debt, Net of Unamortized Discount, Premium and Debt Issuance Costs (Parenthetical) (Detail) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Senior Notes [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 550	$ 550

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Long-Term Debt - Revolving Credit Agreement - Additional Information (Detail) - USD ($)		3 Months Ended
	May 06, 2024	Mar. 31, 2024
Senior secured revolving credit agreement [Member]
Debt Instrument [Line Items]
Amount available for general purposes		$ 300,000,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Amount available for issuance of letter of credit under credit facility		$ 0
Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Collateral coverage ratio		2.00%
Total collateral coverage ratio		1.30%
Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Aggregate amount of available cash		$ 125,000,000
Revolving Credit Facility [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Line of credit	$ 298,100,000
Amount available for issuance of letter of credit under credit facility	0
Reduction in issuance of additional letters of credit	0
Permits to obtain letter of credit	50,000,000
Letters of credit cash collateralized	$ 25,000,000
Revolving Credit Facility [Member] | Letter of Credit [Member]
Debt Instrument [Line Items]
Line of credit		$ 1,900,000

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Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Feb. 29, 2016	Mar. 31, 2024	Dec. 31, 2023
Contingencies And Commitments [Line Items]
Estimated sales tax and related penalties and interest		$ 12.4	$ 12.7
Range of deductible for liability coverage for personal injury claims, upper limit		100.0
Purchase Obligations		0.0
Revolving Credit Facility [Member]
Contingencies And Commitments [Line Items]
Contingent liability under letters of credit and other bonds		1.9
Maximum [Member]
Contingencies And Commitments [Line Items]
Range of deductible for liability coverage for personal injury claims, upper limit		2.5
Minimum [Member]
Contingencies And Commitments [Line Items]
Range of deductible for liability coverage for personal injury claims, upper limit		1.0
Personal Injury Claims [Member]
Contingencies And Commitments [Line Items]
Personal injury claims recorded		11.8	14.6
Total Contingent Liabilities Under Letters of Credit and Bonds [Member]
Contingencies And Commitments [Line Items]
Contingent liability under letters of credit and other bonds		14.0
Services Agreement [Member]
Contingencies And Commitments [Line Items]
Maturity of service arrangement	10 years
Annual payments due under service agreement		25.6
Total remaining payments due under service agreement		88.1
Cash Collateralized Contingent Liability Under Letters of Credit and Bonds [Member]
Contingencies And Commitments [Line Items]
Contingent liability under letters of credit and other bonds		12.1
Consumables and Capital Spare Parts [Member]
Contingencies And Commitments [Line Items]
Total remaining payments due under service agreement		37.0
Accrued Liabilities [Member] | Personal Injury Claims [Member]
Contingencies And Commitments [Line Items]
Personal injury claims recorded		6.2	7.4
Other Liabilities [Member] | Personal Injury Claims [Member]
Contingencies And Commitments [Line Items]
Personal injury claims recorded		$ 5.6	$ 7.2

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Ocean GreatWhite Insurance Claim - Additional Information (Detail) - Hull and Machinery Insurance Policy [Member] $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)
Business Interruption Loss [Line Items]
Repairs and maintenance cost	$ 19.1
Capital expenditures	2.6
Retired assets with an aggregate net book value	3.3
Incremental cost and other deductable amounts	10.0
Insurance settlements receivable	$ 11.7
Percentage of additional loss premium	3.50%

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Earnings Per Share - Schedule of Reconciliation of Numerators and Denominators of Basic and Diluted EPS (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Net Income (Loss)	$ 11,612	$ 7,229
Weighted average shares - basic (denominator):	102,440,000	101,331,000
Dilutive effect of stock-based awards	2,300,000	2,605
Weighted average shares including conversions - diluted (denominator)	104,740,000	103,936,000

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Earnings Per Share - Additional Information (Detail) - $ / shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share [Abstract]
Exercise period of warrant	$ 29.22
Warrants outstanding	7,500,000
Maturity date of warrant	Apr. 23, 2026
Non-vested stock-based awards	283,981	349,784

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Segments and Geographic Area Analysis - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2024 Segment Country
Segment Reporting [Abstract]
Number of reportable segments | Segment	1
Number of countries with rigs | Country	4

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Segments and Geographic Area Analysis - Summary of Information about Disaggregated Revenue by Country (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Total revenues	$ 274,610	$ 232,021
Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues	258,770	214,383
Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues	15,840	17,638
United States [Member]
Segment Reporting Information [Line Items]
Total revenues	153,803	117,138
United States [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues	146,475	104,581
United States [Member] | Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues	7,328	12,557
United Kingdom [Member]
Segment Reporting Information [Line Items]
Total revenues	36,801	18,762
United Kingdom [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues	32,568	17,702
United Kingdom [Member] | Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues	4,233	1,060
Australia [Member]
Segment Reporting Information [Line Items]
Total revenues	29,823	20,149
Australia [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues	27,360	19,309
Australia [Member] | Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues	2,463	840
Brazil [Member]
Segment Reporting Information [Line Items]
Total revenues	26,570	20,660
Brazil [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues	26,570	20,660
Senegal [Member]
Segment Reporting Information [Line Items]
Total revenues	27,613	55,312
Senegal [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues	25,797	52,131
Senegal [Member] | Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues	$ 1,816	$ 3,181