Exhibit 99.5

UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS

On September 1, 2023, Patterson-UTI Energy, Inc., a Delaware corporation (“Patterson-UTI”), and NexTier Oilfield Solutions Inc., a Delaware corporation (“NexTier”), consummated the transactions contemplated by the Agreement and Plan of Merger, dated as of June 14, 2023 (as amended, the “NexTier merger agreement”), among Patterson-UTI, NexTier and certain subsidiaries of Patterson-UTI. Pursuant to the NexTier merger agreement, (i) a direct wholly owned subsidiary of Patterson-UTI merged with and into NexTier, with NexTier continuing as the surviving entity (the “first merger” and the surviving entity, the “surviving corporation”), and (ii) immediately following the first merger, the surviving corporation merged with and into a second direct wholly owned subsidiary of Patterson-UTI, with such second subsidiary surviving the merger as a direct wholly owned subsidiary of Patterson-UTI (the “second merger” and, together with the first merger, the “NexTier mergers”). Upon consummation of the NexTier mergers on September 1, 2023, NexTier became a wholly owned subsidiary of Patterson-UTI.

On August 14, 2023, Patterson-UTI and two of its wholly owned subsidiaries consummated the transactions (the “Ulterra acquisition”) contemplated by the merger agreement, dated as of July 3, 2023 (the “Ulterra merger agreement” and, together with the NexTier merger agreement, the “merger agreements”), with BEP Diamond Holdings Corp. (“Ulterra”), which indirectly owned all of the outstanding equity interests of Ulterra Drilling Technologies, L.P., and BEP Diamond Topco L.P., a Delaware limited partnership, as sole stockholder of Ulterra (the “Ulterra stockholder”). Upon consummation of the Ulterra acquisition and the other transactions contemplated by the Ulterra merger agreement on August 14, 2023, Ulterra became a wholly owned subsidiary of Patterson-UTI.

The following unaudited pro forma condensed combined financial statements (the “pro forma financial statements”) have been prepared from the respective historical consolidated financial statements of Patterson-UTI, NexTier and Ulterra and have been adjusted to reflect the completion of the NexTier mergers and the Ulterra acquisition (referred to collectively as the “combination transactions,” and Patterson-UTI, after giving effect to the combination transactions, is referred to as the “combined company”). The pro forma financial statements have been prepared in accordance with Article 11 of the SEC’s Regulation S-X, as amended by the final rule, Release No. 33-10786 “Amendments to Financial Disclosures about Acquired and Disposed Businesses.” The unaudited pro forma condensed combined balance sheet gives effect to the combination transactions as if they had been completed on June 30, 2023, while the unaudited pro forma condensed combined statements of operations for the six months ended June 30, 2023 and the year ended December 31, 2022 are presented as if the combination transactions had been completed on January 1, 2022. The information presented herein is based on and should be read in conjunction with the historical audited and unaudited consolidated financial statements and related notes of Patterson-UTI filed with the SEC and the historical audited and unaudited consolidated financial statements of NexTier and Ulterra and related notes filed herewith as Exhibits 99.1 – 99.4 to this Current Report on Form 8-K/A.

Upon consummation of the combination transactions, Patterson-UTI determined the value of the purchase consideration using the Patterson-UTI common stock closing price and the number of shares of Patterson-UTI issued on the closing date of each respective transaction. Additionally, after completing the combination transactions, Patterson-UTI identified the assets acquired and liabilities assumed from NexTier and Ulterra and determined the respective fair values using relevant information available at that time. As a result of the foregoing, the pro forma adjustments with respect to the combination transactions are preliminary and are subject to change as additional information becomes available and as additional analysis is performed. Any increases or decreases in the fair value of assets acquired and liabilities assumed upon completion of the final valuations may be materially different from the information presented in the pro forma financial statements.

The pro forma financial statements are presented for illustrative purposes only and are not necessarily indicative of the operating results and financial position of the combined company that would have occurred had the combination transactions occurred on the dates indicated. Adjustments are based on information available to management during the preparation of the pro forma financial statements and assumptions that management believes are reasonable and supportable. Further, the pro forma financial statements do not purport to project the future operating results or financial position of the combined company following the combination transactions. Patterson-UTI's actual financial position and results of operations following completion of the combination transactions may differ materially from these pro forma financial statements.

1

UNAUDITED PRO FORMA CONDENSED COMBINED BALANCE SHEET AS OF JUNE 30, 2023

(in thousands)

	As of				As of													As of				As of													As of
	June 30,				June 30,													June 30,				June 30,													June 30,
	2023				2023				NexTier									2023				2023				Ulterra									2023
					NexTier													Pro Forma				Ulterra
					(Historical								Financing					Combined				(Historical								Financing
	Patterson-				as				Transaction				and					for				as				Transaction				and					Pro
	UTI				adjusted				Accounting				Other					NexTier				adjusted				Accounting				Other					Forma
	(Historical)				in Note 2)				Adjustments			Notes	Adjustments			Notes		Merger				in Note 2)				Adjustments			Notes	Adjustments			Notes		Combined
ASSETS
Current assets:
Cash and cash equivalents	$	150,288			$	310,166			$	(158,360	)	A	$	—				$	302,094			$	72,478			$	(375,739	)	A	$	—				$	119,240
										(61,558	)	B							(61,558	)							(7,620	)	B
										(174,140	)	F		95,000		E			(79,140	)							(56,275	)	F		325,000		E
Accounts receivable, net of   allowance for credit losses		491,049				443,741				—				—					934,790				70,464				—				—					1,005,254
Inventory		68,036				73,415				—				—					141,451				31,430				—				—					172,881
Other current assets		91,954				49,571				(4,665	)	I		—					136,860				23,322				(9,943	)	I		—					150,239
Total current assets		801,327				876,893				(398,723	)			95,000					1,374,497				197,694				(449,577	)			325,000					1,447,614
Non-current assets
Property and equipment, net		2,263,581				780,036				275,678		C		—					3,319,295				60,211				71,001		C		—					3,450,507
Operating lease right-of-use   assets		18,771				29,178				—				—					47,949				8,588				—				—					56,537
Finance lease right-of-use   assets		—				93,565				—				—					93,565				6,538				—				—					100,103
Intangible assets, net		5,140				48,373				687,627		D		—					741,140				238,598				81,402		D		—					1,061,140
Goodwill		—				192,780				758,803		A		—					951,583				147,314				303,492		A		—					1,402,389
Deposits on equipment   purchases		14,222				16,161				—				—					30,383				—				—				—					30,383
Other assets		10,128				13,654				(2,247	)	I		—					21,535				—				—				—					21,535
Deferred tax assets, net		4,027				112,926				(112,926	)	H		—					4,027				512				—				—					4,539
Total assets	$	3,117,196			$	2,163,566			$	1,208,212			$	95,000				$	6,583,974			$	659,455			$	6,318			$	325,000				$	7,574,747
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	245,562			$	347,589			$	—			$	—				$	593,151			$	23,488			$	—			$	—				$	616,639
Accrued liabilities		204,006				215,876				—				—					419,882				13,247				—				—					433,129
Current maturities of long-term   operating lease liabilities		4,753				9,930				497		K		—					15,180				2,642				(23	)	K		—					17,799
Current maturities of long-term   finance lease liabilities		—				52,605				13,833		K		—					66,438				4,409				220		K		—					71,067
Current maturities of long-term   debt		—				14,176				(2,165	)	F		—					12,011				4,150				(4,150	)	F		—					12,011
Total current liabilities		454,321				640,176				12,165				—					1,106,662				47,936				(3,953	)			—					1,150,645
Non-current liabilities
Long-term operating lease   liabilities, less current   maturities		17,287				17,856				895		K		—					36,038				6,021				(52	)	K		—					42,007
Long-term finance lease   liabilities, less current   maturities		—				21,479				5,648		K		—					27,127				1,818				91		K		—					29,036
Long-term debt, net of debt   discount and issuance costs		822,408				340,327				(327,737	)	F		95,000		E			929,998				383,727				(383,727	)	F		325,000		E			1,254,998
Deferred tax liabilities, net		58,635				—				64,634		H		(36,594	)	J			86,675				54,181				34,001		H		—					174,857
Other liabilities		44,376				14,477				—				—					58,853				—				—				—					58,853
Total liabilities		1,397,027				1,034,315				(244,395	)			58,406					2,245,353				493,683				(353,640	)			325,000					2,710,396

The accompanying notes are an integral part of the unaudited pro forma condensed combined financial statements.

2

	As of				As of													As of				As of													As of
	June 30,				June 30,													June 30,				June 30,													June 30,
	2023				2023				NexTier									2023				2023				Ulterra									2023
					NexTier													Pro Forma				Ulterra
					(Historical								Financing					Combined				(Historical								Financing
	Patterson-				as				Transaction				and					for				as				Transaction				and					Pro
	UTI				adjusted				Accounting				Other					NexTier				adjusted				Accounting				Other					Forma
	(Historical)				in Note 2)				Adjustments			Notes	Adjustments			Notes		Merger				in Note 2)				Adjustments			Notes	Adjustments			Notes		Combined
EQUITY
Stockholders’ equity:
Preferred stock, par value $0.01		—				—				—				—					—				—				—				—					—
Common stock, par value $0.01		3,049				2,285				1,719		A		—					7,053				—				349		A		—					7,402
										(2,285	)	G							(2,285	)																(2,285	)
Treasury stock, at cost		(1,554,706	)			—				—				—					(1,554,706	)			—				—				—					(1,554,706	)
Partners’ interests		—				—				—				—					—				379,729				(379,729	)	G		—					—
Additional paid-in capital		3,208,927				942,563				2,641,697		A		—					6,793,187				—				521,057		A		—					7,314,244
										(942,563	)	G							(942,563	)																(942,563	)
Retained earnings (deficit)		62,899				177,862				(61,558	)	B		36,594		J			215,797				(225,662	)			(7,620	)	B		—					(17,485	)
										(177,862	)	G							(177,862	)							225,662		G							47,800
Accumulated other   comprehensive income		—				6,541				(6,541	)	G		—					—				10,363				(10,363	)	G		—					—
Total stockholders’ equity		1,720,169				1,129,251				1,452,607				36,594					4,338,621				164,430				349,356				—					4,852,407
Non-controlling interest		—				—				—				—					—				1,342				10,602		A		—					11,944
Total non-controlling interest		—				—				—				—					—				1,342				10,602				—					11,944
Total equity		1,720,169				1,129,251				1,452,607				36,594					4,338,621				165,772				359,958				—					4,864,351
Total liability and stockholders’   equity	$	3,117,196			$	2,163,566			$	1,208,212			$	95,000				$	6,583,974			$	659,455			$	6,318			$	325,000				$	7,574,747

The accompanying notes are an integral part of the unaudited pro forma condensed combined financial statement

3

UNAUDITED PRO FORMA CONDENSED COMBINED STATEMENT OF OPERATIONS FOR THE SIX MONTHS ENDED JUNE 30, 2023

(in thousands, except share and per share data)

	For the				For the														For the				For the														For the
	Six				Six														Six				Six														Six
	Months				Months														Months				Months														Months
	Ended				Ended														Ended				Ended														Ended
	June 30,				June 30,														June 30,				June 30,														June 30,
	2023				2023				NexTier										2023				2023				Ulterra										2023
					NexTier														Pro Forma				Ulterra
					(Historical									Financing					Combined				(Historical									Financing
	Patterson-				as				Transaction					and					for				as				Transaction					and					Pro
	UTI				adjusted				Accounting					Other					NexTier				adjusted				Accounting					Other					Forma
	(Historical)				in Note 2)				Adjustments			Notes		Adjustments			Notes		Merger				in Note 2)				Adjustments			Notes		Adjustments			Notes		Combined
Operating revenue
Contract drilling	$	851,401			$	—			$	—				$	—				$	851,401			$	—			$	—				$	—				$	851,401
Pressure pumping		543,509				1,880,763				—					—					2,424,272				—				—					—					2,424,272
Directional drilling		111,404				—				—					—					111,404				—				—					—					111,404
Other		44,373				—				—					—					44,373				182,310				—					—					226,683
Total operating revenue		1,550,687				1,880,763				—					—					3,431,450				182,310				—					—					3,613,760
Operating costs and expenses
Contract drillings		461,778				—				—					—					461,778				—				—					—					461,778
Pressure pumping		416,589				1,360,579				—					—					1,777,168				—				—					—					1,777,168
Directional drilling		95,411				—				—					—					95,411				—				—					—					95,411
Other		26,966				—				—					—					26,966				—				—					—					26,966
Cost of equipment rentals		—				—				—					—					—				41,273				—					—					41,273
Cost of equipment sales &   services		—				—				—					—					—				10,541				—					—					10,541
Depreciation, depletion,   amortization and impairment		254,994				122,147				20,022		AA			—					397,163				35,208				266		AA			—					434,854
										(10,924	)	BB								(10,924	)							13,141		BB			—
Selling, general and   administrative		63,823				64,969				(13,579	)	DD			—					115,213				52,659				—					—					167,872
Merger and integration expenses		7,940				5,436				—					—					13,376				—				—					—					13,376
Other operating expense   (income), net		(7,359	)			13,617				—					—					6,258				—				—					—					6,258
Total operating costs and   expenses		1,320,142				1,566,748				(4,481	)				—					2,882,409				139,681				13,407					—					3,035,497
Operating income (loss)		230,545				314,015				4,481					—					549,041				42,629				(13,407	)				—					578,263
Interest income		2,452				3,527				—					—					5,979				—				—					—					5,979
Interest expense		(18,564	)			(17,032	)			16,318		EE			(3,411	)	GG			(22,689	)			(14,889	)			14,889		EE			(11,639	)	GG			(34,328	)
Other income (expense)		3,809				2,647				—					—					6,456				(1,671	)			—					—					4,785
Income (loss) before income   taxes		218,242				303,157				20,799					(3,411	)				538,787				26,069				1,482					(11,639	)				554,699
Income tax expense		(33,950	)			100,900				(1,675	)	FF			791		FF			66,066				(6,691	)			(351	)	FF			2,760		FF			61,784
Net income (loss)		184,292				404,057				19,124					(2,620	)				604,853				19,378				1,131					(8,879	)				616,483
Income attributable to   non-controlling interests		—				—				—					—					—				922				—					—					922
Net income (loss) attributable   to common stockholders		184,292				404,057				19,124					(2,620	)				604,853				18,456				1,131					(8,879	)				615,561
Foreign currency translation   adjustments		—				(322	)			—					—					(322	)			1,825				—					—					1,503
Hedging activities		—				2,066				—					—					2,066				(4,185	)			—					—					(2,119	)
Total comprehensive income	$	184,292			$	405,801			$	19,124				$	(2,620	)			$	606,597			$	16,096			$	1,131				$	(8,879	)			$	614,945
Basic weighted average   shares outstanding		209,952								171,869										381,821								34,900										416,721
Diluted weighted average   shares outstanding		211,188								181,526										392,714								34,900										427,614
Basic earnings per share	$	0.88																	$	1.58																	$	1.48
Diluted earnings per share	$	0.87																	$	1.54																	$	1.44

The accompanying notes are an integral part of the unaudited pro forma condensed combined financial statements.

4

UNAUDITED PRO FORMA CONDENSED COMBINED STATEMENT OF OPERATIONS FOR THE YEAR ENDED DECEMBER 31, 2022

(in thousands, except share and per share data)

	For the				For the														For the				For the														For the
	Year				Year														Year				Year														Year
	Ended				Ended														Ended				Ended														Ended
	December 31,				December 31,														December 31,				December 31,														December 31,
	2022				2022				NexTier										2022				2022				Ulterra										2022
					NexTier														Pro Forma				Ulterra
					(Historical									Financing					Combined				(Historical									Financing
	Patterson-				as				Transaction					and					for				as				Transaction					and					Pro
	UTI				adjusted				Accounting					Other					NexTier				adjusted				Accounting					Other					Forma
	(Historical)				in Note 2)				Adjustments			Notes		Adjustments			Notes		Merger				in Note 2)				Adjustments			Notes		Adjustments			Notes		Combined
Operating revenue
Contract drilling	$	1,316,672			$	—			$	—				$	—				$	1,316,672			$	—			$	—				$	—				$	1,316,672
Pressure pumping		1,022,413				3,244,822				—					—					4,267,235				—				—					—					4,267,235
Directional drilling		216,498				—				—					—					216,498				—				—					—					216,498
Other		92,009				—				—					—					92,009				370,186				—					—					462,195
Total operating revenue		2,647,592				3,244,822				—					—					5,892,414				370,186				—					—					6,262,600
Operating costs and expenses
Contract drilling		832,180				—				—					—					832,180				—				—					—					832,180
Pressure pumping		781,385				2,507,105				—					—					3,288,490				—				—					—					3,288,490
Directional drilling		179,135				—				—					—					179,135				—				—					—					179,135
Other		53,850				—				—					—					53,850				—				—					—					53,850
Cost of equipment rentals		—				—				—					—					—				94,134				—					—					94,134
Cost of equipment sales &   services		—				—				—					—					—				16,772				—					—					16,772
Depreciation, depletion,   amortization and impairment		483,945				229,259				34,967		AA			—					748,171				72,651				432		AA			—					853,673
										(1,737	)	BB			—					(1,737	)							34,156		BB			—
Selling, general and   administrative		116,589				125,342				6,885		DD			—					248,816				111,011				—					—					359,827
Merger and integration expenses		2,069				63,435				61,558		CC			—					127,062				—				7,620		CC			—					134,682
Other operating expense   (income), net		(12,592	)			(12,972	)			—					—					(25,564	)			—				—					—					(25,564	)
Total operating costs and   expenses		2,436,561				2,912,169				101,673					—					5,450,403				294,568				42,208					—					5,787,179
Operating income (loss)		211,031				332,653				(101,673	)				—					442,011				75,618				(42,208	)				—					475,421
Interest income		360				1,637				—					—					1,997				—				—					—					1,997
Interest expense		(40,256	)			(30,019	)			28,127		EE			(6,822	)	GG			(48,970	)			(28,038	)			28,038		EE			(23,278	)	GG			(72,248	)
Other income (expense)		(3,273	)			15,258				—					—					11,985				(5,084	)			—					—					6,901
Income (loss) before income   taxes		167,862				319,529				(73,546	)				(6,822	)				407,023				42,496				(14,170	)				(23,278	)				412,071
Income tax benefit (expense)		(13,204	)			(4,560	)			1,184		FF			38,176		HH			21,596				(13,323	)			1,554		FF			5,521		FF			15,348
Net income (loss)		154,658				314,969				(72,362	)				31,354					428,619				29,173				(12,616	)				(17,757	)				427,419
Income attributable to   non-controlling interests		—				—				—					—					—				1,484				—					—					1,484
Net income (loss) attributable   to common stockholders		154,658				314,969				(72,362	)				31,354					428,619				27,689				(12,616	)				(17,757	)				425,935
Foreign currency translation   adjustments		—				1,118				—					—					1,118				(546	)			—					—					572
Hedging activities		—				12,067				—					—					12,067				9,843				—					—					21,910
Total comprehensive income	$	154,658			$	328,154			$	(72,362	)			$	31,354				$	441,804			$	36,986			$	(12,616	)			$	(17,757	)			$	448,417
Basic weighted average   shares outstanding		215,935								171,869										387,804								34,900										422,704
Diluted weighted average   shares outstanding		219,496								181,526										401,022								34,900										435,922
Basic earnings per share	$	0.72																	$	1.11																	$	1.01
Diluted earnings per share	$	0.70																	$	1.07																	$	0.98

The accompanying notes are an integral part of the unaudited pro forma condensed combined financial statements.

5

NOTES TO THE UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS

Note 1 — Basis of Presentation

The pro forma financial statements have been prepared to reflect adjustments to Patterson-UTI’s historical consolidated financial information that are directly attributable to the combination transactions and are considered reasonable and supportable.

As part of the combination transactions, management has determined Patterson-UTI to be the accounting acquirer of both NexTier and Ulterra for the following reasons:

•Patterson-UTI issued purchase consideration for both combination transactions in the form of equity or cash consideration;

•The ownership following completion of the NexTier mergers comprised 59% Patterson-UTI stockholders (including the 34.9 million shares held by the Ulterra stockholder) and 41% NexTier stockholders, which would give voting control to the Patterson-UTI stockholder group;

•The composition of the combined company board consists of 11 total members, including six Patterson-UTI directors and five NexTier directors;

•Andy Hendricks, President and Chief Executive Officer (“CEO”) of Patterson-UTI, continues to serve as president and CEO of the combined company, and Curtis Huff, Patterson-UTI’s Chairman of the Board, continues in such role;

•The combined company is named Patterson-UTI Energy, Inc., and its ticker symbol remains the same; and

•Patterson-UTI’s corporate headquarters is the corporate headquarters of the combined company.

As the accounting acquirer, Patterson-UTI accounted for the combination transactions under the acquisition method of accounting in accordance with Accounting Standards Codification (“ASC”) 805, “Business Combinations”. The allocation of the preliminary purchase consideration to the fair value of assets acquired and liabilities assumed is based upon Patterson-UTI management’s estimates and assumptions using currently available information. The final valuation could differ materially from the preliminary valuation used in the pro forma adjustments reflected below. The purchase price allocation is subject to change due to several factors, including, but not limited to changes in the final valuation of NexTier and Ulterra assets acquired and liabilities, as management obtains additional information regarding the assets acquired and liabilities assumed. As of the date of this filing, Patterson-UTI has used currently available information to determine preliminary fair value estimates for the combination transactions and its allocation to the NexTier and Ulterra assets acquired and liabilities assumed. The assumptions and estimates used to make the preliminary pro forma adjustments are described in the notes accompanying the pro forma financial statements.

The pro forma combined provision for income taxes does not necessarily reflect the amounts that would have resulted had the combined company filed consolidated income tax returns during the periods presented.

The pro forma basic and diluted earnings per share amounts presented in the pro forma financial statements are based upon the number of shares of Patterson-UTI common stock outstanding, assuming the combination transactions occurred on January 1, 2022.

6

Note 2 — Accounting Policies

Patterson-UTI will continue to perform a comprehensive review of NexTier’s and Ulterra’s accounting and financial reporting policies. As a result of that review, Patterson-UTI may identify differences between these policies, which when conformed could differ materially from the pro forma financial statements presented herein. Patterson-UTI has included certain preliminary pro forma adjustments necessary to conform the accounting and financial reporting policies historically used by NexTier and Ulterra to those used by Patterson-UTI. These adjustments relate to (i) the presentation of depreciation and amortization outside of cost of sales and selling, general and administrative expenses, (ii) research and development costs to be included in other operating expenses, (iii) reclassification of certain items previously classified in property and equipment into inventory due to their nature as short term assets to be sold or consumed, and (iv) insurance expense to be allocated to pressure pumping - expense. Additionally, Patterson-UTI has adjusted certain financial statement line items (“FSLI”) as shown below to conform to presentation within the Patterson-UTI historical financial statements.

Pro forma condensed combined balance sheet

	As of June 30, 2023
(in thousands)	NexTier  (Historical)				FSLI alignment				NexTier (Historical as adjusted)
Trade and other accounts receivable, net	$	443,741			$	(443,741	)		$	—
Accounts receivable, net of allowance for credit losses		—				443,741				443,741
Inventories, net		73,415				(73,415	)			—
Inventory		—				73,415				73,415
Prepaid and other current assets		49,571				(49,571	)			—
Other current assets		—				49,571				49,571
Property and equipment, net		796,197				(16,161	)			780,036
Deposits on equipment purchases		—				16,161				16,161
Deferred income taxes		112,926				(112,926	)			—
Deferred tax assets, net		—				112,926				112,926
Other noncurrent assets		13,654				(13,654	)			—
Other assets		—				13,654				13,654
Accrued expenses		191,053				(191,053	)			—
Customer contract liabilities		19,377				(19,377	)			—
Other current liabilities		5,446				(5,446	)			—
Accrued liabilities		—				215,876				215,876
Long-term debt, net of unamortized deferred financing costs and    unamortized debt discount, less current maturities		340,327				(340,327	)			—
Long-term debt, net of debt discount and issuance costs		—				340,327				340,327
Other noncurrent liabilities		14,477				(14,477	)			—
Other liabilities		—				14,477				14,477
Paid-in capital in excess of par value		942,563				(942,563	)			—
Additional paid-in capital		—				942,563				942,563

7

Pro forma condensed combined balance sheet

	As of June 30, 2023
(in thousands)	Ulterra (Historical)				FSLI alignment				Accounting policy adjustment				Ulterra  (Historical as adjusted)
Cash	$	69,155			$	(69,155	)		$	—			$	—
Restricted cash		3,323				(3,323	)			—				—
Cash and cash equivalents		—				72,478				—				72,478
Receivables, net of allowance		70,464				(70,464	)			—				—
Accounts receivables, net of allowance for credit losses		—				70,464				—				70,464
Inventories, net		25,565				(25,565	)			—				—
Inventory		—				25,565				5,865				31,430
Income tax receivable		1,402				(1,402	)			—				—
Prepaid and other current assets		11,977				(11,977	)			—				—
Derivative asset		9,943				(9,943	)			—				—
Other current assets		—				23,322				—				23,322
Lease right of use assets, operating		8,588				(8,588	)			—				—
Operating lease right-of-use assets		—				8,588				—				8,588
Rental equipment, net		47,694				(47,694	)			—				—
Property, plant and equipment, net		24,920				(24,920	)			—				—
Finance lease right-of-use assets		—				6,538				—				6,538
Property and equipment, net		—				66,076				(5,865	)			60,211
Intangibles, net		238,598				(238,598	)			—				—
Intangible assets, net		—				238,598				—				238,598
Deferred income taxes		512				(512	)			—				—
Deferred tax assets, net		—				512				—				512
Operating lease, current		2,642				(2,642	)			—				—
Current maturities of long-term operating lease liabilities		—				2,642				—				2,642
Finance lease, current		4,409				(4,409	)			—				—
Current maturities of long-term finance lease liabilities		—				4,409				—				4,409
Operating lease, net of current portion		6,021				(6,021	)			—				—
Long-term operating lease liabilities, less current maturities		—				6,021				—				6,021
Finance lease, net of current portion		1,818				(1,818	)			—				—
Long-term finance lease liabilities, less current maturities		—				1,818				—				1,818
Long-term debt, net of current maturities and discount		383,727				(383,727	)			—				—
Long-term debt, net of debt discount and issuance costs		—				383,727				—				383,727
Deferred income taxes		54,181				(54,181	)			—				—
Deferred tax liabilities, net		—				54,181				—				54,181
Accumulated deficit		(225,662	)			225,662				—				—
Retained earnings (deficit)		—				(225,662	)			—				(225,662	)

8

Pro forma condensed combined statement of operations

	For the Six Months Ended June 30, 2023
(in thousands)	NexTier (Historical)				FSLI alignment				Accounting policy adjustment				NexTier  (Historical  as adjusted)
Revenue	$	1,880,763			$	(1,880,763	)		$	—			$	—
Pressure pumping		—				1,880,763				—				1,880,763
Cost of services		1,350,243				(1,350,243	)			—				—
Pressure pumping - expense		—				1,350,243				10,336				1,360,579
Selling, general and administrative expenses		79,380				—				(14,411	)			64,969
Loss (gain) on disposal of assets		9,542				(9,542	)			—				—
Other operating expense (income), net		—				9,542				4,075				13,617
Interest expense, net		(13,505	)			13,505				—				—
Interest income		—				3,527				—				3,527
Interest expense		—				(17,032	)			—				(17,032	)

	For the Year Ended December 31, 2022
(in thousands)	NexTier (Historical)				FSLI alignment				Accounting policy adjustment				NexTier  (Historical  as adjusted)
Revenue	$	3,244,822			$	(3,244,822	)		$	—			$	—
Pressure pumping		—				3,244,822				—				3,244,822
Cost of services		2,490,095				(2,490,095	)			—				—
Pressure pumping - expense		—				2,490,095				17,010				2,507,105
Selling, general and administrative expenses		145,996				—				(20,654	)			125,342
Loss (gain) on disposal of assets		(16,616	)			16,616				—				—
Other operating expense (income), net		—				(16,616	)			3,644				(12,972	)
Interest expense, net		(28,382	)			28,382				—				—
Interest income		—				1,637				—				1,637
Interest expense		—				(30,019	)			—				(30,019	)

	For the Six Months Ended June 30, 2023
(in thousands)	Ulterra (Historical)				FSLI alignment				Accounting policy adjustment				Ulterra  (Historical  as adjusted)
Equipment rentals	$	157,258			$	(157,258	)		$	—			$	—
Equipment sales and services		25,052				(25,052	)			—				—
Other Revenue		—				182,310				—				182,310
Cost of equipment rentals		61,109				—				(19,836	)			41,273
Cost of equipment sales and services		10,541				—				—				10,541
Selling, general and administrative		68,031				—				(15,372	)			52,659
Depreciation, depletion, amortization and impairment		—				—				35,208				35,208

	For the Year Ended December 31, 2022
(in thousands)	Ulterra (Historical)				FSLI alignment				Accounting policy adjustment				Ulterra  (Historical  as adjusted)
Equipment rentals	$	331,625			$	(331,625	)		$	—			$	—
Equipment sales and services		38,561				(38,561	)			—				—
Other Revenue		—				370,186				—				370,186
Cost of equipment rentals		138,621				—				(44,487	)			94,134
Cost of equipment sales and services		16,772				—				—				16,772
Selling, general and administrative		139,175				—				(28,164	)			111,011
Depreciation, depletion, amortization and impairment		—				—				72,651				72,651

9

Note 3 — Unaudited Pro Forma Condensed Combined Balance Sheet Adjustments and Assumptions

A.Reflects estimated total purchase consideration paid by Patterson-UTI for the respective combination transactions. The following table presents the preliminary consideration paid and preliminary purchase price allocation of assets acquired and liabilities assumed in the combination transactions:

	NexTier
(in thousands, except exchange ratio and per share amounts)
Consideration:
Number of shares of NexTier common stock outstanding as of June 30, 2023		228,549
Multiplied by the exchange ratio		0.752
Number of shares of Patterson-UTI common stock to be issued in connection with the merger		171,869
Patterson-UTI shares common stock price on September 1, 2023	$	14.91
Common stock equity consideration		2,562,565
Incentive unit replacement award consideration		80,851
NexTier long-term debt to be repaid by Patterson-UTI		158,360
Consideration transferred	$	2,801,776
Allocated to:
Cash and cash equivalents	$	136,026
Accounts receivable		443,741
Inventory		73,415
Property and equipment		1,055,714
Intangible assets		736,000
Deposits on equipment purchases		16,161
Operating lease right-of-use assets		29,178
Finance lease right-of-use assets		93,565
Other assets		56,313
Accounts payable		(347,589	)
Accrued liabilities		(215,876	)
Operating lease liabilities		(29,178	)
Finance lease liabilities		(93,565	)
Long-term debt		(24,601	)
Deferred tax liabilities, net		(64,634	)
Other liabilities		(14,477	)
Preliminary net assets acquired		1,850,193
Preliminary allocation to goodwill	$	951,583
Less historical goodwill		(192,780	)
Goodwill pro forma adjustment	$	758,803

10

	Ulterra
(in thousands, except exchange ratio and per share amounts)
Consideration:
Number of shares issued to Ulterra as merger consideration		34,900
Patterson-UTI shares common stock price on August 14, 2023	$	14.94
Common stock equity consideration		521,406
Net cash consideration (1)		375,739
Consideration transferred	$	897,145
Fair value of non-controlling interests	$	11,944
Allocated to:
Cash and cash equivalents	$	16,203
Accounts receivable		70,464
Inventory		31,430
Other current assets		13,379
Property and equipment		131,212
Intangible assets		320,000
Deferred tax assets		512
Operating lease right-of-use assets		8,588
Finance lease right-of-use assets		6,538
Accounts payable		(23,488	)
Accrued liabilities		(13,247	)
Operating lease liabilities		(8,588	)
Finance lease liabilities		(6,538	)
Deferred tax liabilities		(88,182	)
Preliminary net assets acquired		458,283
Preliminary allocation to goodwill	$	450,806
Less historical goodwill		(147,314	)
Goodwill pro forma adjustment	$	303,492

——————

(1) Net cash consideration included $370 million cash consideration and customary purchase price adjustments set forth in the Ulterra merger agreement relating to cash, net working capital and indebtedness of Ulterra as of the closing.

B.Reflects estimated transaction costs that Patterson-UTI expects to incur related to legal, financial advisory and other professional fees in order to consummate the combination transactions, which are not yet reflected in the historical condensed balance sheet of Patterson-UTI.

C.Reflects property and equipment of NexTier and Ulterra adjusted to fair market value as part of the combination transactions.

	As of June 30, 2023
	NexTier						Ulterra
	Property and Equipment						Property and Equipment
($ in thousands)	Fair value of Property and Equipment, net				Remaining Useful Life		Fair value of Property and Equipment, net				Remaining Useful Life
Land	$	13,698			n/a		$	2,250			n/a
Land improvements		6,334			6			—			n/a
Buildings and improvements		61,703			20			7,565			20
Leasehold improvements		4,844			9			392			10
Personal property		969,135			4.4			121,005			8
Pro forma property and equipment, net		1,055,714						131,212
Historic property and equipment, net		780,036						60,211
Pro forma adjustment	$	275,678					$	71,001

D.As part of the preliminary valuation, Patterson-UTI has recorded the following to reflect the fair value of identifiable intangible assets.

11

	As of June 30, 2023
	NexTier						Ulterra
	Intangible Assets						Intangible Assets
	Estimated Fair				Remaining		Estimated Fair				Remaining
($ in thousands)	Value				Useful Life		Value				Useful Life
Customer relationships	$	553,000			15		$	248,000			15
Trade name		72,000			10			11,000			10
Developed technology		111,000			10			61,000			10
Pro forma intangible assets		736,000						320,000
Historical intangible assets		48,373						238,598
Pro forma adjustment	$	687,627					$	81,402

E.Reflects borrowing by Patterson-UTI on its revolving credit facility to pay transaction costs and repay certain indebtedness at the respective closings.

As of June 30, 2023
($ in thousands)
Pro forma for NexTier financing		Pro forma for Ulterra financing
LoC Facility (Revolver)		LoC Facility (Revolver)
$95,000		$325,000
SOFR+ 1.75%+.10% (~7.17%)		SOFR+ 1.75%+.10% (~7.17%)
27-Mar-26		27-Mar-26

F.Reflects the repayment of debt at the respective closings and therefore in connection with the combination transactions, net of discounts and deferred financing costs. A portion of the debt repayment was made with closing cash from NexTier and Ulterra, which was reflected as a reduction in cash.

G.Reflects the elimination of NexTier’s and Ulterra’s historical equity accounts.

H.Reflects the increase in deferred tax liabilities resulting from the combination transactions using statutory tax rates. Specifically, these adjustments are the direct result of the acquired intangible assets and property and equipment which will have a different basis for tax and book purposes as well as the impact of jurisdictional netting adjustments and the release of certain valuation allowances as a result of the combination transactions.

I.Reflects derivative instruments that will not be acquired as part of the combination transactions. The merger agreement for Ulterra specifically refers to derivative instruments not being assumed and the value of those instruments is also included as consideration in Note 3A.

J.Reflects the reduction of certain deferred tax liabilities due to the release of certain valuation allowances for Patterson-UTI related to net operating losses that will be able to be utilized as a result of the combination transactions.

K.Reflects the change in fair value of operating and finance leases in connection with the combination transactions.

Note 4 — Unaudited Pro Forma Condensed Combined Statement of Operations Adjustments and Assumptions

AA.Reflects the additional amortization expense recognized as part of the additional fair value attributed to the intangible assets acquired as part of the combination transactions. Refer to Note 3D.

Six Months Ended June 30, 2023
	NexTier				Ulterra
(in thousands)	Amortization				Amortization
Pro forma amortization of intangible assets	$	27,584			$	11,867
Historical amortization of intangible assets		7,562				11,601
Pro forma adjustment	$	20,022			$	266

12

For the Year Ended December 31, 2022
	NexTier				Ulterra
(in thousands)	Amortization				Amortization
Pro forma amortization of intangible assets	$	55,167			$	23,733
Historical amortization of intangible assets		20,200				23,301
Pro forma adjustment	$	34,967			$	432

These preliminary estimates of fair value will likely differ from final amounts that Patterson-UTI will calculate after completing a detailed valuation analysis, and the difference could have a material effect on the pro forma financial statements. A 10% change in the valuation of intangible assets would cause a corresponding increase or decrease in the balance of goodwill and annual amortization expense of approximately $2.8 million for the six months ended June 30, 2023 and $5.5 million for the year ended December 31, 2022 for the NexTier merger, and $1.2 million for the six months ended June 30, 2023 and $2.4 million for the year ended December 31, 2022 for the Ulterra acquisition. These calculations are based on the values and useful lives identified in Note 3D.

BB.Reflects the change in depreciation expense recognized as part of the pro forma adjustment to the fair market value of property and equipment. Refer to Note 3C.

Six Months Ended June 30, 2023
	NexTier				Ulterra
(in thousands)	Depreciation				Depreciation
Pro forma depreciation	$	103,661			$	36,748
Historical depreciation		114,585				23,607
Pro forma adjustment	$	(10,924	)		$	13,141

For the Year Ended December 31, 2022
	NexTier				Ulterra
(in thousands)	Depreciation				Depreciation
Pro forma depreciation	$	207,322			$	83,506
Historical depreciation		209,059				49,350
Pro forma adjustment	$	(1,737	)		$	34,156

CC.Reflects estimated transaction costs that Patterson-UTI expects to incur related to legal, financial advisory and other professional fees in order to consummate the combination transactions, which are not yet reflected in the historical condensed balance sheet of Patterson-UTI.

DD.Reflects the fair value-based measure of (i) the NexTier stock options and NexTier time-based restricted stock unit awards expected to be converted into Patterson-UTI stock options and Patterson-UTI time-based restricted stock unit awards, respectively, upon the same terms existing immediately prior to the effective time of the NexTier mergers and (ii) the NexTier performance-based restricted stock unit awards and performance-based unit awards expected to be converted into Patterson-UTI time-based restricted stock units, in each case, in respect of a number of shares of Patterson-UTI common stock assuming the performance-based vesting requirements applicable to such awards were achieved at the level of actual performance attained through immediately prior to the effective time, and otherwise upon the same terms existing immediately prior to the effective time of the NexTier mergers. The expense reflects the portion of the awards to be recognized as stock-based compensation cost in the post-combination financial statements of the combined company.

Six Months Ended June 30, 2023
			NexTier
(in thousands)			Stock-based Compensation
Post-combination compensation expense			$	6,252
Historical compensation expense				19,831
Pro forma adjustment			$	(13,579	)

13

For the Year Ended December 31, 2022
			NexTier
(in thousands)			Stock-based Compensation
Post-combination compensation expense			$	40,002
Historical compensation expense				33,117
Pro forma adjustment			$	6,885

EE.Reflects the reduction of interest expense for the repayment of indebtedness not assumed in connection with the combination transactions. Refer to Note 3F.

FF.Reflects the incremental corporate income tax expense (benefit) to be recognized as a part of the pro forma adjustments for the combination transactions at the Patterson-UTI estimated blended statutory tax rate of approximately 23%, adjusted by permanent tax differences.

GG.Reflects the incremental interest expense associated with borrowing by Patterson-UTI on its revolving credit facility to pay transaction costs and repay certain indebtedness at closing. Refer to Note 3E.

HH.Reflects the release of a deferred tax asset valuation allowance for Patterson-UTI related to federal net operating losses which are forecasted to become realizable upon consummation of the combination transactions.

Note 5 — Earnings Per Share

The following pro forma weighted average shares calculations have been performed for the six months ended June 30, 2023 and for the year ended December 31, 2022. The unaudited pro forma condensed combined earnings per share (“EPS”), basic and diluted, are computed by dividing net income attributable to common stockholders by the weighted-average number of shares of common stock outstanding as of June 30, 2023, as adjusted for the pro forma share issuances discussed above.

Patterson-UTI has one class of common stock outstanding, which continues to be outstanding upon the consummation of the combination transactions.

	For the				For the				For the				For the
	Six Months Ended				Year Ended				Six Months Ended				Year Ended
	June 30, 2023				December 31, 2022				June 30, 2023				December 31, 2022
	Pro Forma				Pro Forma				Pro Forma				Pro Forma
	Condensed				Condensed				Condensed				Condensed
	Combined				Combined				Combined				Combined
	for				for				for Combination				for Combination
(in thousands, except per share data)	NexTier Merger				NexTier Merger				Transactions				Transactions
Pro forma net income attributable    to common stockholders - basic	$	604,853			$	428,619			$	615,561			$	425,935
Basic weighted average shares outstanding		381,821				387,804				416,721				422,704
Pro forma basic earnings per share	$	1.58			$	1.11			$	1.48			$	1.01
Pro forma net income attributable    to common stockholders - diluted	$	604,853			$	428,619			$	615,561			$	425,935
Diluted weighted average shares outstanding		392,714				401,022				427,614				435,922
Pro forma diluted earnings per share	$	1.54			$	1.07			$	1.44			$	0.98
Pro forma basic and diluted weighted    average shares
Patterson-UTI common shares		209,952				215,935				209,952				215,935
Patterson-UTI common shares issued    to Ulterra stockholder	n/a				n/a					34,900				34,900
Patterson-UTI common shares issued    to NexTier stockholders		171,869				171,869				171,869				171,869
Total pro forma basic weighted    average shares		381,821				387,804				416,721				422,704
Patterson-UTI equity awards		1,236				3,561				1,236				3,561
Replacement incentive awards issued    to NexTier unitholders		9,657				9,657				9,657				9,657
Total pro forma diluted weighted    average shares		392,714				401,022				427,614				435,922

14