
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, DC 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 ~~September~~March 3031, ~~2025~~2026

☐ 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 001-12215

Quest Diagnostics Incorporated


Delaware			16-1387862
(State of Incorporation)			(I.R.S. Employer Identification Number)
500 Plaza Drive
Secaucus,	NJ	07094
(973)	520-2700

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


Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, $0.01 Par Value	DGX	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 (§232.405 of this chapter) 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 ☒

As of ~~October~~April 15, ~~2025~~2026, there were outstanding ~~111~~110,~~242~~696,~~362~~429 shares of the registrant’s common stock, $.01 par value.

Table of Contents

PART I - FINANCIAL INFORMATION

		Page
Item 1. Financial Statements (unaudited)
	Index to unaudited consolidated financial statements filed as part of this report:
	Consolidated Statements of Operations for the Three and Nine Months Ended September 30, 2025 and 2024	2
	Consolidated Statements of Operations for the Three Months Ended March 31, 2026 and 2025	2
	Consolidated Statements of Comprehensive Income for the Three and Nine Months Ended September 30, 2025 and 2024	3
	Consolidated Statements of Comprehensive Income for the Three Months Ended March 31, 2026 and 2025	3
	Consolidated Balance Sheets as of September 30, 2025 and December 31, 2024	4
	Consolidated Balance Sheets as of March 31, 2026 and December 31, 2025	4
	Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2025 and 2024	5
	Consolidated Statements of Cash Flows for the Three Months Ended March 31, 2026 and 2025	5
	Consolidated Statements of Stockholders’ Equity for the Three and Nine Months Ended September 30, 2025 and 2024	6
	Consolidated Statements of Stockholders’ Equity for the Three Months Ended March 31, 2026 and 2025	6
	Notes to Consolidated Financial Statements (unaudited)	87
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations
	Management’s Discussion and Analysis of Financial Condition and Results of Operations	2823
Item 3. Quantitative and Qualitative Disclosures About Market Risk
	See Item 2. “Management’s Discussion and Analysis of Financial Condition and Results of Operations”	4033
Item 4. Controls and Procedures
	Controls and Procedures	4033

Table of Contents

QUEST DIAGNOSTICS INCORPORATED AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS

FOR THE THREE ~~AND NINE~~ MONTHS ENDED ~~SEPTEMBER~~MARCH 3031, ~~2025~~2026 AND ~~2024~~2025

(unaudited)

(in millions, except per share data)

	Three Months Ended September 30,				Nine Months Ended September 30,
	Three Months Ended March 31,
	2025		2024		2025		2024
	2026		2025
Net revenues	$	2,~~816~~895	$	2,~~488~~652	$	~~8,229~~	$	~~7,251~~
Operating costs and expenses and other operating income:
Cost of services	1,~~867~~953		1,~~677~~789		~~5,474~~		~~4,865~~
Selling, general and administrative	~~501~~504		~~448~~476		~~1,463~~		~~1,304~~
Amortization of intangible assets	3937		3239		~~117~~		90
Other operating expense, net	232		12		5		7
Total operating costs and expenses, net	2,~~430~~496		2,~~158~~306		~~7,059~~		~~6,266~~
Operating income	~~386~~399		~~330~~346		~~1,170~~		~~985~~
Other income (expense):
Interest expense, net	(6663)		(4967)		~~(200)~~		~~(136)~~
Other income, net	8		15		18		27
Other expense, net	(2)		(3)
Total non-operating expense, net	(5865)		(3470)		~~(182)~~		~~(109)~~
Income before income taxes and equity in earnings of equity method investees	~~328~~334		~~296~~276		~~988~~		~~876~~
Income tax expense	(7774)		(6559)		~~(233)~~		~~(205)~~
Equity in earnings of equity method investees, net of taxes	84		618		35		14
Net income	~~259~~264		~~237~~235		~~790~~		~~685~~
Less: Net income attributable to noncontrolling interests	1412		1115		43		36
Net income attributable to Quest Diagnostics	$	~~245~~252	$	~~226~~220	$	~~747~~	$	~~649~~
Earnings per share attributable to Quest Diagnostics’ common stockholders:
Basic	$	2.1827	$	21.0197	$	~~6.66~~	$	~~5.80~~
Diluted	$	2.1624	$	1.9994	$	~~6.57~~	$	~~5.74~~
Weighted average common shares outstanding:
Basic	~~112~~110		~~112~~111		~~112~~		~~111~~
Diluted	~~113~~112		113		~~113~~		~~112~~

The accompanying notes are an integral part of these statements.

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QUEST DIAGNOSTICS INCORPORATED AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

FOR THE THREE ~~AND NINE~~ MONTHS ENDED ~~SEPTEMBER~~MARCH 3031, ~~2025~~2026 AND ~~2024~~2025

(unaudited)

(in millions)

	Three Months Ended September 30,				Nine Months Ended September 30,
	Three Months Ended March 31,
	2025		2024		2025		2024
	2026		2025
Net income	$	~~259~~264	$	~~237~~235	$	~~790~~	$	~~685~~
Other comprehensive income (loss):
Foreign currency translation adjustment	(2416)		15		48		~~(4)~~
Net deferred gain on cash flow hedges, net of taxes	—		3		—		3
Other comprehensive (loss) income	(16)		5
Other comprehensive (loss) income	(24)		4		48		(1)
Comprehensive income	248		240
Comprehensive income	235		241		838		684
Less: Comprehensive income attributable to noncontrolling interests	12		15
Less: Comprehensive income attributable to noncontrolling interests	14		11		43		36
Comprehensive income attributable to Quest Diagnostics	$	236	$	225
Comprehensive income attributable to Quest Diagnostics	$	221	$	230	$	795	$	648

The accompanying notes are an integral part of these statements.

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QUEST DIAGNOSTICS INCORPORATED AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

~~SEPTEMBER~~MARCH 3031, ~~2025~~2026 AND DECEMBER 31, ~~2024~~2025

(unaudited)

(in millions, except per share data)

	September 30,2025		December 31,2024
	March 31,2026		December 31,2025
Assets
Current assets:
Cash and cash equivalents	$	~~432~~393	$	~~549~~420
Accounts receivable, net of allowance for credit losses of $26 and $29 as of September 30, 2025 and December 31, 2024, respectively	1,456		1,304
Accounts receivable, net of allowance for credit losses of $27 and $25 as of March 31, 2026 and December 31, 2025, respectively	1,587		1,408
Inventories	~~186~~225		~~188~~189
Prepaid expenses and other current assets	~~333~~361		~~351~~361
Total current assets	2,~~407~~566		2,~~392~~378
Property, plant and equipment, net	2,~~145~~189		2,~~113~~203
Operating lease right-of-use assets	~~649~~691		~~651~~657
Goodwill	89,~~901~~120		8,~~856~~945
Intangible assets, net	1,~~662~~717		1,~~763~~636
Investments in equity method investees	~~137~~134		~~123~~136
Other assets	~~296~~256		~~255~~270
Total assets	$	16,~~197~~673	$	16,~~153~~225
Liabilities and Stockholders’ Equity
Current liabilities:
Accounts payable and accrued expenses	$	1,~~457~~500	$	1,~~394~~600
Current portion of long-term debt	~~504~~503		~~602~~504
Current portion of long-term operating lease liabilities	~~173~~174		~~173~~174
Total current liabilities	2,~~134~~177		2,~~169~~278
Long-term debt	5,~~171~~155		5,~~615~~167
Long-term operating lease liabilities	~~534~~574		~~535~~537
Other liabilities	~~982~~1,022		~~938~~957
Commitments and contingencies
Redeemable noncontrolling interest	8179		8380
Stockholders’ equity:
Quest Diagnostics stockholders’ equity:
Common stock, par value $0.01 per share; 600 shares authorized as of both September 30, 2025 and December 31, 2024; 162 shares issued as of both September 30, 2025 and December 31, 2024	2		2
Common stock, par value $0.01 per share; 600 shares authorized as of both March 31, 2026 and December 31, 2025; 162 shares issued as of both March 31, 2026 and December 31, 2025	2		2
Additional paid-in capital	2,~~355~~347		2,~~361~~381
Retained earnings	910,~~837~~151		9,~~360~~994
Accumulated other comprehensive loss	(4043)		(8827)
Treasury stock, at cost; 51 shares as of both September 30, 2025 and December 31, 2024	(4,896)		(4,857)
Treasury stock, at cost; 51 shares and 52 shares as of March 31, 2026 and December 31, 2025, respectively	(5,091)		(5,180)
Total Quest Diagnostics stockholders’ equity	7,~~258~~366		67,~~778~~170
Noncontrolling interests	37300		3536
Total stockholders’ equity	7,~~295~~666		67,~~813~~206
Total liabilities and stockholders’ equity	$	16,~~197~~673	$	16,~~153~~225

The accompanying notes are an integral part of these statements.

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QUEST DIAGNOSTICS INCORPORATED AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

FOR THE ~~NINE~~THREE MONTHS ENDED ~~SEPTEMBER~~MARCH 3031, ~~2025~~2026 AND ~~2024~~2025

(unaudited)

(in millions)

	Nine Months Ended September 30,
	Three Months Ended March 31,
	2025		2024
	2026		2025
Cash flows from operating activities:
Net income	$	~~790~~264	$	~~685~~235
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	~~425~~147		~~358~~140
Provision for credit losses	21		41
Deferred income tax expense (benefit)	118		(21)
Deferred income tax expense	48		7
Stock-based compensation expense	6320		6122
Other, net	378		17(1)
Changes in operating assets and liabilities:
Accounts receivable	(~~153~~180)		(~~140~~101)
Accounts payable and accrued expenses	~~113~~(12)		(~~102~~53)
Income taxes payable	~~(1)~~13		3115
Other assets and liabilities, net	27(31)		~~(23)~~49
Net cash provided by operating activities	~~1,421~~278		~~870~~314
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(5138)		~~(1,781)~~—
Capital expenditures	(~~369~~114)		(~~302~~117)
Other investing activities, net	~~(20)~~—		372
Net cash used in investing activities	(~~440~~152)		(~~2,046~~115)
Cash flows from financing activities:
Proceeds from borrowings	~~410~~—		~~1,846~~215
Repayments of debt	(1~~,011~~)		(~~302~~600)
Purchases of treasury stock	(150)		—
Exercise of stock options	65		29
Exercise of stock options	61		52
Employee payroll tax withholdings on stock issued under stock-based compensation plans	(37)		(42)
Employee payroll tax withholdings on stock issued under stock-based compensation plans	(44)		(24)
Dividends paid	(88)		(84)
Dividends paid	(263)		(247)
Distributions to noncontrolling interest partners	(7)		(18)
Distributions to noncontrolling interest partners	(43)		(35)
Other financing activities, net	(84)		(61)
Other financing activities, net	(61)		(36)
Net cash used in financing activities	(152)		(561)
Net cash (used in) provided by financing activities	(1,101)		1,254
Effect of exchange rate changes on cash and cash equivalents and restricted cash	(1)		1
Effect of exchange rate changes on cash and cash equivalents and restricted cash	3		—
Net change in cash and cash equivalents and restricted cash	(27)		(361)
Net change in cash and cash equivalents and restricted cash	(117)		78
Cash and cash equivalents and restricted cash, beginning of period	420		549
Cash and cash equivalents and restricted cash, beginning of period	549		686
Cash and cash equivalents and restricted cash, end of period	$	393	$	188
Cash and cash equivalents and restricted cash, end of period	$	432	$	764

The accompanying notes are an integral part of these statements.

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QUEST DIAGNOSTICS INCORPORATED AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

FOR THE THREE ~~AND NINE~~ MONTHS ENDED ~~SEPTEMBER~~MARCH 3031, ~~2025~~2026 AND ~~2024~~2025

(unaudited)

(in millions)

For the Three Months Ended September 30, 2025		Quest Diagnostics Stockholders’ Equity
For the Three Months Ended March 31, 2026		Quest Diagnostics Stockholders’ Equity
	Shares ofCommon StockOutstanding	CommonStock		AdditionalPaid-InCapital		RetainedEarnings		AccumulatedOtherCompre-hensive Loss		TreasuryStock, atCost		Non-controllingInterests		TotalStock-holders’Equity
Balance, June 30, 2025	112	$	2	$	2,332	$	9,682	$	(16)	$	(4,772)	$	37	$	7,265
Balance, December 31, 2025	110	$	2	$	2,381	$	9,994	$	(27)	$	(5,180)	$	36	$	7,206
Net income						~~245~~252						1211		~~257~~263
Other comprehensive loss, net of taxes								(2416)						(2416)
Dividends declared						(9095)								(9095)
Distributions to noncontrolling interest partners												(125)		(125)
Issuance of common stock under benefit plans				2(41)						648				87
Stock-based compensation expense				20										20
Exercise of stock options	1			26						2159				2365
Shares to cover employee payroll tax withholdings on stock issued under stock-based compensation plans				(119)						(118)				(237)
Purchases of treasury stock	(1)									(150)				(150)
Contributions by noncontrolling interest partners												258		258
Balance, September 30, 2025	111	$	2	$	2,355	$	9,837	$	(40)	$	(4,896)	$	37	$	7,295
Balance, March 31, 2026	111	$	2	$	2,347	$	10,151	$	(43)	$	(5,091)	$	300	$	7,666
For the Nine Months Ended September 30, 2025		Quest Diagnostics Stockholders’ Equity
	Shares ofCommon StockOutstanding	CommonStock		AdditionalPaid-InCapital		RetainedEarnings		AccumulatedOtherCompre-hensive Loss		TreasuryStock, atCost		Non-controllingInterests		TotalStock-holders’Equity
Balance, December 31, 2024	111	$	2	$	2,361	$	9,360	$	(88)	$	(4,857)	$	35	$	6,813
Net income						747						37		784
Other comprehensive income, net of taxes								48						48
Dividends declared						(270)								(270)
Distributions to noncontrolling interest partners												(35)		(35)
Issuance of common stock under benefit plans	1			(52)						73				21
Stock-based compensation expense				63										63
Exercise of stock options				3						62				65
Shares to cover employee payroll tax withholdings on stock issued under stock-based compensation plans				(20)						(24)				(44)
Purchases of treasury stock	(1)									(150)				(150)
Balance, September 30, 2025	111	$	2	$	2,355	$	9,837	$	(40)	$	(4,896)	$	37	$	7,295


For the Three Months Ended March 31, 2025		Quest Diagnostics Stockholders’ Equity
	Shares of Common Stock Outstanding	Common Stock		Additional Paid-In Capital		Retained Earnings		Accumulated Other Compre- hensive Loss		Treasury Stock, at Cost		Non- controlling Interests		Total Stock- holders’ Equity
Balance, December 31, 2024	111	$	2	$	2,361	$	9,360	$	(88)	$	(4,857)	$	35	$	6,813
Net income						220						12		232
Other comprehensive income, net of taxes								5						5
Dividends declared						(90)								(90)
Distributions to noncontrolling interest partners												(14)		(14)
Issuance of common stock under benefit plans	1			(54)						61				7
Stock-based compensation expense				22										22
Exercise of stock options										29				29
Shares to cover employee payroll tax withholdings on stock issued under stock-based compensation plans				(19)						(23)				(42)


Balance, March 31, 2025	112	$	2	$	2,310	$	9,490	$	(83)	$	(4,790)	$	33	$	6,962

The accompanying notes are an integral part of these statements.

Table of Contents

For the Three Months Ended September 30, 2024		Quest Diagnostics Stockholders’ Equity
	Shares ofCommon StockOutstanding	CommonStock		AdditionalPaid-InCapital		RetainedEarnings		AccumulatedOtherCompre-hensive Loss		TreasuryStock, atCost		Non-controllingInterests		TotalStock-holders’Equity
Balance, June 30, 2024	111	$	2	$	2,314	$	9,080	$	(19)	$	(4,760)	$	39	$	6,656
Net income						226						10		236
Other comprehensive income, net of taxes								4						4
Dividends declared						(84)								(84)
Distributions to noncontrolling interest partners												(17)		(17)
Issuance of common stock under benefit plans				1						6				7
Stock-based compensation expense				19										19
Exercise of stock options	1			1						23				24
Shares to cover employee payroll tax withholdings on stock issued under stock-based compensation plans										(1)				(1)
Acquisition of additional ownership interest in subsidiary				(3)										(3)
Balance, September 30, 2024	112	$	2	$	2,332	$	9,222	$	(15)	$	(4,732)	$	32	$	6,841
For the Nine Months Ended September 30, 2024		Quest Diagnostics Stockholders’ Equity
	Shares ofCommon StockOutstanding	CommonStock		AdditionalPaid-InCapital		RetainedEarnings		AccumulatedOtherCompre-hensive Loss		TreasuryStock, atCost		Non-controllingInterests		TotalStock-holders’Equity
Balance, December 31, 2023	111	$	2	$	2,320	$	8,825	$	(14)	$	(4,826)	$	35	$	6,342
Net income						649						32		681
Other comprehensive loss, net of taxes								(1)						(1)
Dividends declared						(252)								(252)
Distributions to noncontrolling interest partners												(35)		(35)
Issuance of common stock under benefit plans				(40)						60				20
Stock-based compensation expense				61										61
Exercise of stock options	1									52				52
Shares to cover employee payroll tax withholdings on stock issued under stock-based compensation plans				(6)						(18)				(24)
Acquisition of additional ownership interest in subsidiary				(3)										(3)
Balance, September 30, 2024	112	$	2	$	2,332	$	9,222	$	(15)	$	(4,732)	$	32	$	6,841

The accompanying notes are an integral part of these statements.

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QUEST DIAGNOSTICS INCORPORATED AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

(in millions, unless otherwise indicated)

1. DESCRIPTION OF BUSINESS

Background

Quest Diagnostics Incorporated and its subsidiaries ("Quest Diagnostics" or the "Company") work across the healthcare ecosystem to create a healthier world, one life at a time. The Company's diagnostic information services ("DIS") business provides diagnostic insights from the results of its laboratory testing to empower people, physicians, and organizations to take action to improve health outcomes. Derived from one of the world's largest databases of de-identifiable clinical lab results, the Company's diagnostic insights reveal new avenues to identify and treat disease, inspire healthy behaviors and improve healthcare management. In the right hands and with the right context, the Company's diagnostic insights can inspire actions that transform lives and create a healthier world. The Company provides services to a broad range of customers within its primary customer channels - physicians (including those associated with accountable care organizations ("ACOs") and Federally Qualified Health Centers ("FQHCs")), hospitals, and patients and consumers. Other customers include health plans, employers, new and emerging retail healthcare providers, government agencies, pharmaceutical companies and other commercial clinical laboratories. The Company offers broad access to clinical testing through a network of laboratories, patient service centers, phlebotomists in physician offices, and connectivity resources, including call centers and mobile phlebotomists, nurses and other health and wellness professionals. The Company's large in-house staff of medical and scientific experts, including medical directors, scientific directors, genetic counselors and board-certified geneticists, provide medical and scientific consultation to healthcare providers and patients regarding the Company's tests and test results, and help them best utilize Quest Diagnostics' services to improve outcomes and enhance satisfaction. The Company's Diagnostic Solutions ("DS") group, which represents the balance of the Company's consolidated net revenues, includes the Company's risk assessment services business, which offers solutions for insurers, and the Company's healthcare information technology businesses, which offer solutions for healthcare providers and payers.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

The interim unaudited consolidated financial statements reflect all adjustments which in the opinion of management are necessary for a fair statement of results of operations, comprehensive income, financial condition, cash flows and stockholders' equity for the periods presented. Except as otherwise disclosed, all such adjustments are of a normal recurring nature. Operating results for the interim periods are not necessarily indicative of the results that may be expected for the full year. These interim unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements included in the Company’s ~~2024~~2025 Annual Report on Form 10-K. The year-end balance sheet data was derived from the audited consolidated financial statements as of December 31, ~~2024~~2025 but does not include all the disclosures required by accounting principles generally accepted in the United States (“GAAP”).

The accounting policies of the Company are the same as those set forth in Note 2 to the audited consolidated financial statements contained in the Company’s ~~2024~~2025 Annual Report on Form 10-K.

Use of Estimates

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 amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Earnings Per Share

The Company's unvested restricted stock units that contain non-forfeitable rights to dividends are participating securities and, therefore, are included in the earnings allocation in computing earnings per share using the two-class method. Basic earnings per common share is calculated by dividing net income attributable to Quest Diagnostics, adjusted for earnings allocated to participating securities, by the weighted average number of common shares outstanding. Diluted earnings per common share is calculated by dividing net income attributable to Quest Diagnostics, adjusted for earnings allocated to

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QUEST DIAGNOSTICS INCORPORATED AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – CONTINUED

(unaudited)

(in millions, unless otherwise indicated)

participating securities, by the weighted average number of common shares outstanding after giving effect to all potentially dilutive common shares outstanding during the period. Potentially dilutive common shares include the dilutive effect of outstanding stock options and performance share units granted under the Company's Amended and Restated Employee Long-Term Incentive Plan (“ELTIP”) and its Amended and Restated Non-Employee Director Long-Term Incentive Plan (“DLTIP”), as well as the dilutive effect of accelerated share repurchase agreements, if applicable. Earnings allocable to participating securities include the portion of dividends declared as well as the portion of undistributed earnings during the period allocable to participating securities.

New Accounting Standards to be Adopted

In ~~December~~November ~~2023~~2024, the Financial Accounting Standards Board ("FASB") issued a new accounting standard which will require companies to ~~make~~disaggregate ~~additional~~certain income ~~tax~~statement ~~disclosures~~expenses. The pronouncement is effective for annual filings for the year ended December 31, ~~2025~~2027 and for interim periods within the year ended December 31, 2028. The Company does not expect the adoption of this standard to have a material impact on its results of operations, financial position or cash flows.

In November 2024, the FASB issued a new accounting standard which will require companies to disaggregate certain income statement expenses. The pronouncement is effective for annual filings for the year ended December 31, 2027 and for interim periods within the year ended December 31, 2028. The Company does not expect the adoption of this standard to have a material impact on its results of operations, financial position or cash flows.

In September 2025, the FASB issued a new accounting standard which impacts internal-use software accounting by removing all references to software development project stages such that the guidance is neutral to different software development methods. The pronouncement is effective for annual filings for the year ended December 31, 2028 and for interim periods within such year. The Company is currently evaluating the impact of the standard.

In July 2025, the One Big Beautiful Bill Act (“OBBBA”) was enacted. The OBBBA makes permanent key elements of the Tax Cuts and Jobs Act of 2017, including 100% bonus depreciation, domestic research cost expensing and the business interest expense limitation, among other tax changes. Many of the tax provisions of the OBBBA are designed to accelerate tax deductions, which could lead to lower cash tax payments. The new legislation has multiple effective dates, with certain provisions effective in 2025 and others in the future. While the Company continues to assess the impact of the tax provisions of the OBBBA on its consolidated financial statements, the Company currently believes that the tax provisions of the legislation are not expected to have a material impact on the Company’s statement of operations. The Company's consolidated deferred income tax liabilities as of September 30, 2025 and December 31, 2024 were $378 million and $278 million, respectively. The increase was principally due to the domestic research cost expensing and bonus depreciation elements of the OBBBA.

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QUEST DIAGNOSTICS INCORPORATED AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – CONTINUED

(unaudited)

(in millions, unless otherwise indicated)

3. EARNINGS PER SHARE

The computation of basic and diluted earnings per common share was as follows (in millions, except per share data):

	Three Months Ended September 30,				Nine Months Ended September 30,
	Three Months Ended March 31,
	2025		2024		2025		2024
	2026		2025
Amounts attributable to Quest Diagnostics’ common stockholders:
Net income attributable to Quest Diagnostics	$	~~245~~252	$	~~226~~220	$	~~747~~	$	~~649~~
Less: Earnings allocated to participating securities	21		1		4		3
Earnings available to Quest Diagnostics’ common stockholders – basic and diluted	$	~~243~~251	$	~~225~~219	$	~~743~~	$	~~646~~
Weighted average common shares outstanding – basic	~~112~~110		~~112~~111		~~112~~		~~111~~
Effect of dilutive securities:
Stock options and performance share units	12		12		1		1
Weighted average common shares outstanding – diluted	~~113~~112		113		~~113~~		~~112~~
Earnings per share attributable to Quest Diagnostics’ common stockholders:
Basic	$	2.1827	$	21.0197	$	~~6.66~~	$	~~5.80~~
Diluted	$	2.1624	$	1.9994	$	~~6.57~~	$	~~5.74~~

4. ~~The~~RESTRUCTURING ~~following~~ACTIVITIES ~~securities were not included in the calculation of diluted earnings per share due to their antidilutive effect:~~

	Three Months Ended September 30,		Nine Months Ended September 30,
	2025	2024	2025	2024
Stock options and performance share units	—	—	—	1

4. RESTRUCTURING ACTIVITIES AND IMPAIRMENT CHARGES

Invigorate Program

The Company is engaged in a multi-year program called Invigorate, which includes structured plans to drive savings and improve productivity across the value chain, including in such areas as patient services, logistics and laboratory operations, revenue services, information technology and procurement. The Invigorate program aims to deliver 3% annual cost savings and productivity improvements to partially offset pressures from the current inflationary environment, including labor and benefit cost increases and reimbursement pressures. The Company is leveraging automation and artificial intelligence to improve productivity and also improve quality across the entire value chain, not just in the laboratory. Other areas of focus include reducing denials and patient concessions, enhancing the digital experience, and selecting and retaining talent.

~~Restructuring and Impairment Charges~~8

The following table provides a summary of the Company's pre-tax restructuring and impairment charges for the three and nine months ended September 30, 2025 and 2024:

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	Three Months Ended September 30,				Nine Months Ended September 30,
	2025		2024		2025		2024
Employee separation costs	$	6	$	7	$	18	$	21
Asset impairment charges	5		—		29		—
Total restructuring and impairment charges	$	11	$	7	$	47	$	21

Restructuring Charges

The Company's pre-tax restructuring charges for the three ~~and nine~~ months ended ~~September~~March 3031, 2026 and 2025 ~~included~~were $67 million and $1811 million, respectively, ofentirely related to employee separation costs associated with various workforce reduction initiatives as the Company continued to restructure its organization. Additionally, during the three and nine months ended September 30, 2025, the Company recorded impairment charges of $5 million and $29 million, respectively, on certain long-lived assets related to the exit of a business. Of the total restructuring ~~and impairment~~ charges incurred during the three months ended ~~September~~March 3031, ~~2025~~2026, $2 million, ~~$4 million~~ and $5 million were recorded in cost of services, and selling, general and administrative expenses ~~and other operating expense~~, ~~net,~~ respectively. Of the total restructuring ~~and impairment~~ charges incurred during the ~~nine~~three months ended ~~September~~March 3031, 2025, $86 million, ~~$10 million~~ and $295 million were recorded in cost of services, and selling, general and administrative expenses, ~~and other operating expense, net,~~ respectively.

The Company's pre-tax restructuring charges for the three and nine months ended September 30, 2024 were $7 million and $21 million, respectively, entirely related to employee separation costs associated with various workforce reduction initiatives as the Company continued to restructure its organization. Of the total restructuring charges incurred during the three months ended September 30, 2024, $4 million and $3 million were recorded in cost of services and selling, general and administrative expenses, respectively. Of the total restructuring charges incurred during the nine months ended September 30, 2024, $12 million and $9 million were recorded in cost of services and selling, general and administrative expenses, respectively.

Charges for all periods presented were primarily recorded in the Company's DIS business.

The restructuring liability as of ~~September~~both March 3031, ~~2025~~2026 and December 31, ~~2024~~2025, which is included in accounts payable and accrued expenses, was $~~14 million~~18 ~~and $13~~ million~~, respectively~~.

5. BUSINESS ACQUISITIONS

~~Acquisition~~During August 2025, the Company and Corewell Health signed a definitive agreement to form a new entity which will perform laboratory testing in the state of ~~LifeLabs~~Michigan via a new laboratory facility. The parties completed the transaction during January 2026. In connection with the transaction, Corewell Health contributed a laboratory business over which the Company obtained a controlling financial interest. Under the terms of the transaction, the Company and Corewell Health are continuing to serve providers and patients in Michigan from their existing patient service centers (which are operated by the newly formed entity) and their existing laboratories until a new laboratory is operational during 2027. Equity ownership of the newly formed entity is shared 51% by the Company and 49% by Corewell Health and the Company is consolidating the entity in its consolidated financial statements.

OnThe ~~August~~total ~~23,~~purchase ~~2024,~~consideration ~~the~~transferred ~~Company~~to ~~acquired~~Corewell ~~all~~Health ofin ~~the~~conjunction ~~issued~~with ~~and~~the ~~outstanding~~formation ~~common shares~~ of ~~LifeLabs Inc. and all of~~ the ~~partnership~~entity ~~interests~~included ~~of BPC Lab Finance LP (collectively, "LifeLabs") in an all-cash transaction for approximately CAN~~ $~~1.35~~38 ~~billion~~million ~~(approximately USD $1 billion), net~~ of cash ~~acquired. LifeLabs~~consideration ~~provides laboratory diagnostic information~~ and ~~digital~~a ~~health~~49% ~~connectivity~~non-controlling ~~systems~~interest in ~~Canada. The Company recorded~~ the ~~assets acquired and liabilities assumed based on a preliminary purchase price allocation. During the nine months ended September 30~~entity, ~~2025,~~with ~~the~~such ~~Company~~interest ~~finalized~~valued ~~its~~at ~~purchase price allocation and recorded a~~ $9253 million ~~increase to deferred income tax assets and a corresponding decrease to goodwill~~. ~~The measurement period adjustment did not impact the Company's consolidated results of operations.~~

~~The~~Based ~~following~~on ~~unaudited~~the ~~pro~~preliminary ~~forma~~purchase ~~combined~~price ~~financial~~allocation, ~~information~~which ~~reflects~~may ~~the~~be ~~consolidated~~revised ~~statement~~as ofadditional ~~operations~~information ofbecomes ~~the~~available ~~Company~~during ~~as if~~ the ~~acquisition~~measurement ~~of LifeLabs had occurred as of January 1~~period, ~~2023.~~the ~~The~~assets ~~pro~~acquired ~~forma~~and ~~information~~liabilities ~~includes~~assumed ~~adjustments~~principally ~~primarily~~consist ~~related~~of to$179 million ~~the amortization~~ of ~~acquired intangible assets~~goodwill, ~~interest expense associated with debt~~ of ~~LifeLabs~~ which ~~was~~$22 million ~~extinguished~~is ~~prior~~deductible tofor ~~the~~tax ~~acquisition~~purposes, ~~interest~~$124 million ~~expense~~of ~~associated~~customer-related ~~with~~intangible ~~senior notes issued to fund the acquisition~~assets, ~~the~~$20 million ~~impact on depreciation expense~~ of ~~recording~~operating ~~acquired~~lease ~~property~~assets, ~~plant~~$20 million ~~and~~of ~~equipment~~operating atlease ~~fair value~~liabilities, and ~~transaction~~$12 million ~~costs~~of ~~related~~deferred toincome ~~the~~tax ~~LifeLabs acquisition~~liabilities. The ~~pro~~intangible ~~forma~~assets ~~combined~~are ~~financial~~being ~~information~~amortized ~~does~~over ~~not~~a ~~include~~useful ~~the~~life ~~estimated annual synergies expected to be realized upon completion~~ of ~~the~~15 ~~integration of LifeLabs and therefore is not indicative of the results of operations as they would have been had the transaction been effected on the assumed date (in millions, except per share data)~~years.

The acquisition described above was accounted for under the acquisition method of accounting. As such, the assets acquired and liabilities assumed are recorded based on their estimated fair values as of the closing date. The goodwill recorded primarily includes the expected synergies resulting from combining the operations of the acquired entity with those of the Company and the value associated with an assembled workforce and other intangible assets that do not qualify for separate recognition. All of the goodwill acquired in connection with the acquisition has been allocated to the Company's DIS business. For further details regarding business segment information, see Note 11. Supplemental pro forma combined financial information, and financial information subsequent to the acquisition close date, has not been presented as the impact of the acquisition is not material to the Company's consolidated financial statements.

For details regarding the Company's 2025 acquisitions, see Note 6 to the audited consolidated financial statements in the Company's 2025 Annual Report on Form 10-K.

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	Three Months Ended September 30, 2024		Nine Months Ended September 30, 2024
Pro forma net revenues	$	2,588	$	7,700
Pro forma net income attributable to Quest Diagnostics	$	222	$	647
Pro forma earnings per share attributable to Quest Diagnostics' common stockholders:
Basic	$	1.97	$	5.78
Diluted	$	1.95	$	5.72

Acquisition of select assets of Spectra Laboratories

During February 2025, the Company entered into a definitive agreement to acquire select clinical testing assets and select dialysis-related water testing assets of Fresenius Medical Care's wholly-owned Spectra Laboratories, a leading provider of renal-specific laboratory testing services in the U.S.

On August 4, 2025, the acquisition of the select clinical testing assets closed and the Company paid $34 million of cash consideration for such business. Based on the preliminary purchase price allocation, which may be revised as additional information becomes available during the measurement period, the assets acquired and liabilities assumed primarily consist of $25 million of tax-deductible goodwill and $9 million of customer-related intangible assets. The intangible assets are being amortized over a useful life of 15 years.

The acquisition of the select dialysis-related water testing assets is expected to close by the end of 2025 and such closing remains subject to customary closing conditions.

The acquisition was accounted for under the acquisition method of accounting. As such, the assets acquired and liabilities assumed were recorded based on their estimated fair values as of the closing date. Supplemental pro forma combined financial information has not been presented as the impact of the acquisition is not material to the Company's consolidated financial statements. The goodwill recorded primarily includes the expected synergies resulting from combining the operations of the acquired entity with those of the Company and the value associated with an assembled workforce and other intangible assets that do not qualify for separate recognition. All of the goodwill acquired in connection with the acquisition has been allocated to the Company's DIS business. For further details regarding business segment information, see Note 12.

For details regarding the Company's 2024 acquisitions, see Note 6 to the audited consolidated financial statements in the Company's 2024 Annual Report on Form 10-K.

Venture with Corewell Health

During August 2025, the Company and Corewell Health signed a definitive agreement to enter into a venture which will perform laboratory testing in the state of Michigan via a new laboratory facility. Equity ownership of the venture will be shared 51% by Quest and 49% by Corewell Health. The parties expect to complete the transaction during the first quarter of 2026 and they expect to construct a new laboratory facility to be operational during 2027. The transaction is subject to customary closing conditions.

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6. FAIR VALUE MEASUREMENTS

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table provides a summary of the recognized assets and liabilities that are measured at fair value on a recurring basis:

			Basis of Fair Value Measurements
			Quoted Prices in Active Markets for Identical Assets/Liabilities		Significant Other Observable Inputs		Significant Unobservable Inputs
September 30, 2025	Total		Level 1		Level 2		Level 3
March 31, 2026	Total		Level 1		Level 2		Level 3
Assets:
Deferred compensation trading securities	$	8284	$	8284	$	—	$	—
Cash surrender value of life insurance policies	7267		—		7267		—
Equity investments	3		3		—		—
Fixed-to-variable interest rate swaps	3		—		3		—
Fixed-to-variable interest rate swaps	18		—		18		—
Total	$	154	$	84	$	70	$	—
Total	$	175	$	85	$	90	$	—
Liabilities:
Deferred compensation liabilities	$	152	$	—	$	152	$	—
Contingent consideration	~~114~~99		—		—		~~114~~99
Total	$	266	$	—	$	152	$	114
Fixed-to-variable interest rate swaps	2		—		2		—
Redeemable noncontrolling interest	$	81	$	—	$	—	$	81
Total	$	253	$	—	$	154	$	99
Redeemable noncontrolling interest	$	79	$	—	$	—	$	79

			Basis of Fair Value Measurements
December 31, 2024	Total		Level 1		Level 2		Level 3
December 31, 2025	Total		Level 1		Level 2		Level 3
Assets:
Deferred compensation trading securities	$	7278	$	7278	$	—	$	—
Cash surrender value of life insurance policies	6472		—		6472		—
Total	$	136	$	72	$	64	$	—
Equity investments	2		2		—		—
Fixed-to-variable interest rate swaps	14		—		14		—
Total	$	166	$	80	$	86	$	—
Liabilities:
Deferred compensation liabilities	$	~~140~~150	$	—	$	~~140~~150	$	—
Contingent consideration	~~106~~96		—		—		~~106~~96
Fixed-to-variable interest rate swaps	34		—		34		—
Total	$	246	$	—	$	150	$	96
Total	$	280	$	—	$	174	$	106
Redeemable noncontrolling interest	$	80	$	—	$	—	$	80
Redeemable noncontrolling interest	$	83	$	—	$	—	$	83

A detailed description regarding the Company's fair value measurements is contained in Note 7 to the audited consolidated financial statements in the Company's ~~2024~~2025 Annual Report on Form 10-K.

The Company offers certain employees the opportunity to participate in a non-qualified supplemental deferred compensation plan. A participant's deferrals, together with Company matching credits, are invested in a variety of participant-~~directed stock and bond mutual funds that are classified as trading securities. The trading securities are classified within Level~~

1310

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directed stock and bond mutual funds that are classified as trading securities. The trading securities are classified within Level 1 of the fair value hierarchy because the changes in the fair value of these securities are measured using quoted prices in active markets based on the market price per unit multiplied by the number of units held, exclusive of any transaction costs. A corresponding adjustment for changes in fair value of the trading securities is also reflected in the changes in fair value of the deferred compensation obligation. The deferred compensation liabilities are classified within Level 2 of the fair value hierarchy because their inputs are derived principally from observable market data by correlation to the trading securities.

The Company offers certain employees the opportunity to participate in a non-qualified deferred compensation program. A participant's deferrals, together with Company matching credits, are “invested” at the direction of the employee in a hypothetical portfolio of investments which are tracked by an administrator. The Company purchases life insurance policies, with the Company named as beneficiary of the policies, for the purpose of funding the program's liability. Changes in the cash surrender value of the life insurance policies are based upon earnings and changes in the value of the underlying investments. Changes in the fair value of the deferred compensation obligation are derived using quoted prices in active markets based on the market price per unit multiplied by the number of units. The cash surrender value, which is recorded in other assets in the Company's consolidated balance sheet, and the deferred compensation obligation are classified within Level 2 of the fair value hierarchy because their inputs are derived principally from observable market data by correlation to the hypothetical investments. ~~Deferrals~~Through December 31, 2025, deferrals under the plan ~~currently~~could ~~may~~ only be made by participants who made deferrals under the plan in 2017. Effective January 1, 2026, the plan no longer accepted deferrals on compensation earned after December 31, 2025.

The Company's investment portfolio primarily includes equity investments comprised mostly of strategic holdings in companies concentrated in the life sciences and healthcare industries. Equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) with readily determinable fair values are measured at fair value in prepaid expenses and other current assets in the Company's consolidated balance sheet. Such equity investments are classified within Level 1 of the fair value hierarchy because the changes in the fair values of the securities are measured using quoted prices in active markets based on the market price per share multiplied by the number of shares held, exclusive of any transaction costs.

The fair value measurements of the Company's fixed-to-variable interest rate swaps, classified within Level 2 of the fair value hierarchy, are model-derived valuations as of a given date, in which all significant inputs are observable in active markets including certain financial information and certain assumptions regarding past, present and future market conditions.

During June 2023, the Company acquired Haystack Oncology, Inc. ("Haystack"), an early-stage oncology company focused on minimal residual disease testing to aid in the detection of residual or recurring cancer and better inform therapy decisions. In connection with the acquisition there is a contingent consideration obligation under which the seller can receive up to $100 million of additional consideration dependent upon the achievement of certain revenue benchmarks through 2028 and up to an additional $50 million of consideration dependent upon the Company receiving reimbursement coverage from the Centers for Medicare and Medicaid Services ("CMS"). The portion of the contingent consideration obligation which is dependent upon the achievement of certain revenue benchmarks was measured at fair value using a Monte Carlo method and is classified within Level 3 of the fair value hierarchy as the fair value is determined based on significant inputs that are not observable. Significant inputs include management’s estimate of revenue and other market inputs, including comparable company revenue volatility (3525%) and a discount rate (107.50%). The portion of the contingent consideration obligation which is dependent upon the Company receiving reimbursement coverage from the CMS is also classified within Level 3 of the fair value hierarchy as the fair value is principally determined based on management's estimate, which is a significant input that is not observable. Additionally, the fair value of the entire contingent consideration obligation is also impacted by a market discount rate (5%) which adjusts the estimated payments to present value. The fair value of the contingent consideration obligation is not overly sensitive to movements in the comparable company revenue volatility or the discount rate used for the portion of the obligation that is dependent upon the achievement of certain revenue benchmarks. For example, changing the comparable company revenue volatility from 3525% to 2530% impacts the fair value by $4 3 million (assuming no other inputs are modified) and changing the discount rate from 107.50% to 710.05% impacts the fair value by $2 5 million (assuming no other inputs are modified).

The Company has additional contingent consideration obligations in connection with other acquisitions. The liabilities related to such obligations are included in the amounts below.

~~The following table provides a reconciliation of the beginning and ending balances of liabilities using significant unobservable inputs (Level 3):~~11

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	Contingent Consideration
Balance, December 31, 2024	$	106
Total fair value adjustments included in earnings - unrealized	8
Balance, September 30, 2025	$	114

The following table provides a reconciliation of the beginning and ending balances of liabilities using significant unobservable inputs (Level 3):

The $8 million net loss included in earnings associated with the change in the fair value of contingent consideration for the nine months ended September 30, 2025 is reported in other operating expense, net.


	Contingent Consideration

Balance, December 31, 2025	$	96


Total fair value adjustments included in earnings - unrealized	3


Balance, March 31, 2026	$	99

Of The ~~the aggregate~~ $~~114~~3 million ~~contingent~~net ~~consideration~~loss ~~obligation as of September 30, 2025, $63 million and $51 million were~~ included in ~~other~~earnings ~~liabilities~~associated ~~and~~with ~~accounts~~the ~~payable~~change ~~and accrued expenses, respectively,~~ in the ~~Company's~~fair ~~consolidated~~value ~~balance~~of ~~sheet. Of the aggregate $106 million~~ contingent consideration ~~obligation~~for asthe ofthree ~~December~~months ended March 31, ~~2024,~~2026 ~~$101 million~~is ~~and~~reported ~~$5 million were included~~ in other ~~liabilities~~operating ~~and accounts payable and accrued expenses~~expense, ~~respectively, in the Company's consolidated balance sheet~~net.

~~During~~Of the ~~nine~~aggregate ~~months~~$99 ~~ended~~million ~~September~~contingent consideration obligation as of March 3031, ~~2025~~2026, ~~the~~$47 million ~~Company~~and ~~recorded~~$52 million awere ~~$29~~included ~~million~~in ~~impairment~~other ~~charge~~liabilities onand ~~certain~~accounts ~~long-lived~~payable ~~assets~~and ~~related~~accrued toexpenses, respectively, in the ~~exit~~Company's ofconsolidated abalance ~~business~~sheet. ~~The~~Of ~~fair~~the ~~value~~aggregate ~~measurement~~$96 ~~was~~million ~~classified~~contingent ~~within~~consideration ~~Level~~obligation 3as of ~~the~~December 31, ~~fair~~2025, ~~value~~$45 million ~~hierarchy~~and as$51 million itwere ~~was~~included ~~based~~in onother ~~significant~~liabilities ~~inputs~~and ~~that~~accounts ~~are~~payable ~~not~~and ~~observable~~accrued expenses, respectively, in the Company's consolidated balance sheet.

In connection with the sale of an 18.9% noncontrolling interest in a subsidiary to UMass Memorial Medical Center ("UMass") on July 1, 2015, the Company granted UMass the right to require the Company to purchase all of its interest in the subsidiary at fair value commencing July 1, 2020. As of ~~September~~March 3031, ~~2025~~2026, the redeemable noncontrolling interest was presented at its fair value. The fair value measurement of the redeemable noncontrolling interest is classified within Level 3 of the fair value hierarchy because the fair value is based on a discounted cash flow analysis that takes into account, among other items, the joint venture's expected future cash flows, long term growth rates, and a discount rate commensurate with economic risk.

The carrying amounts of cash and cash equivalents, accounts receivable, and accounts payable and accrued expenses approximate fair value based on the short maturities of these instruments. As of ~~September~~March 3031, ~~2025~~2026 and December 31, ~~2024~~2025, the fair value of the Company’s debt was estimated at $5.76 billion and $65.17 billion, respectively. Principally all of the Company's debt is classified within Level 1 of the fair value hierarchy because the fair value of the debt is estimated based on rates currently offered to the Company with identical terms and maturities, using quoted active market prices and yields, taking into account the underlying terms of the debt instruments.

157. FINANCIAL INSTRUMENTS

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7. DEBT

During April 2025, the Company amended the agreement for its $750 million senior unsecured revolving credit facility (the “Credit Facility” or "Senior Unsecured Revolving Credit Facility") to extend the maturity to April 2030, while maintaining the borrowing capacity under the facility at $750 million. Under the Credit Facility, the Company can issue letters of credit totaling $150 million (see Note 11). Issued letters of credit reduce the available borrowing capacity under the Credit Facility. Additionally, the Credit Facility includes an additional $500 million uncommitted accordion which, if utilized, brings the total capacity under the facility to $1.3 billion. Interest on the Credit Facility is based on certain published rates plus an applicable margin based on changes in the Company's public debt ratings. At the option of the Company, it may elect to lock into Term Secured Overnight Financing Rate ("Term SOFR")-based interest rate contracts for periods up to six months. For interest on any U.S. Dollar-denominated outstanding amounts not covered under Term SOFR-based interest rate contracts, the Company can opt for an alternate base rate, which is calculated by reference to the prime rate, the federal funds rate or an adjusted Term SOFR rate. The Company also has the option to borrow in other currencies. As of September 30, 2025, the Company's borrowing rate for Term SOFR-based loans under the Credit Facility was adjusted Term SOFR plus 1.00%. The Credit Facility contains various covenants, including the maintenance of a financial leverage ratio, which could impact the Company's ability to, among other things, incur additional indebtedness. As of both September 30, 2025 and December 31, 2024, there were no outstanding borrowings under the Senior Unsecured Revolving Credit Facility.

During the nine months ended September 30, 2025, the Company repaid in full the outstanding indebtedness under the Company's $600 million of 3.50% senior notes, which matured on March 30, 2025.

The Company has $500 million of 3.45% senior notes due June 2026. The senior notes are included in current portion of long-term debt in the Company's September 30, 2025 consolidated balance sheet. Such notes were included in long-term debt in the Company's December 31, 2024 consolidated balance sheet.

For further details regarding the Company's debt, see Note 13 to the audited consolidated financial statements in the Company's 2024 Annual Report on Form 10 K.

8. FINANCIAL INSTRUMENTS

The Company uses derivative financial instruments, from time to time, to manage its exposure to market risks for changes in interest rates and foreign currencies. This strategy includes the use of interest rate swap agreements, forward-starting interest rate swap agreements, interest rate lock agreements and foreign currency forward contracts to manage its exposure to movements in interest and currency rates. The Company has established policies and procedures for risk assessment and the approval, reporting and monitoring of derivative financial instrument activities. These policies prohibit holding or issuing derivative financial instruments for speculative purposes. The Company does not enter into derivative financial instruments that contain credit-risk-related contingent features or requirements to post collateral.

Interest Rate Risk

The Company is exposed to interest rate risk on its cash and cash equivalents and its debt obligations. Interest income earned on cash and cash equivalents may fluctuate as interest rates change; however, due to their relatively short maturities, the Company does not hedge these assets or their investment cash flows and the impact of interest rate risk is not material. The Company's debt obligations consist of fixed-rate and, from time to time, variable-rate debt instruments. The Company's primary objective is to achieve the lowest overall cost of funding while managing the variability in cash outflows within an acceptable range. In order to achieve this objective, the Company has historically entered into interest rate swap agreements.

Interest rate swaps involve the periodic exchange of payments without the exchange of underlying principal or notional amounts. Net settlements between the counterparties are recognized as an adjustment to interest expense, net.

~~Interest Rate Derivatives – Cash Flow Hedges~~12

From time to time, the Company has entered into various interest rate lock agreements and forward-starting interest rate swap agreements to hedge part of the Company's interest rate exposure associated with the variability in future cash flows attributable to changes in interest rates.

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Interest Rate Derivatives – Cash Flow Hedges

Interest Rate Derivatives – Fair Value Hedges

The Company maintains various fixed-to-variable interest rate swaps to convert a portion of the Company's long-term debt into variable interest rate debt.

A summary of the notional amounts of these interest rate swap agreements as of ~~September~~March 3031, ~~2025~~2026 and December 31, ~~2024~~2025 was as follows:

	Notional Amount
Debt Instrument	~~September~~March 3031, ~~2025~~2026		December 31, ~~2024~~2025
5.00% Senior Notes due December 2034	$	850	$	~~700~~850
2.80% Senior Notes due June 2031	550		—550
6.40% Senior Notes due November 2033	400		—400
Total notional amounts	$	1,800	$	700
	$	1,800	$	1,800

The fixed-to-variable interest rate swap agreements in the table above have variable interest rates ranging from SOFR minus 1.36% to SOFR plus 2.48%.

As of ~~September~~March 3031, ~~2025~~2026 and December 31, ~~2024~~2025, the following amounts were recorded on the consolidated balance sheets related to cumulative basis adjustments for fair value hedges included in the carrying amount of long-term debt:

Carrying Amount of Hedged Long-Term Debt

Hedge Accounting Basis Adjustment ~~(a)~~

Carrying Amount of Hedged Long-Term Debt

Hedge Accounting Basis Adjustment ~~(a)~~

Balance Sheet Classification

~~September~~March 3031, ~~2025~~2026

December 31, ~~2024~~2025

Long-term debt

1,~~803~~786

201

~~658~~1,799

~~(29)~~15

~~(a) The balance includes $2 million and $5 million of remaining unamortized hedging adjustments on discontinued relationships as of September 30, 2025 and December 31, 2024, respectively.~~13

The following table presents the effect of fair value hedge accounting on the consolidated statement of operations for the three and nine months ended September 30, 2025:

	Three Months Ended September 30, 2025		Nine Months Ended September 30, 2025
	Interest Expense, Net		Interest Expense, Net
Total for line item in which the effects of fair value hedges are recorded	$	(66)	$	(200)
Gain (loss) on fair value hedging relationships:
Hedged items (Long-term debt)	$	(1)	$	(52)
Derivatives designated as hedging instruments	$	1	$	52

A summary of the fair values of derivative instruments in the consolidated balance sheets was as follows:

September 30, 2025

December 31, 2024

Balance SheetClassification

Fair Value

Balance SheetClassification

Fair Value

Derivatives Designated as Hedging Instruments

Fixed-to-variable interest rate swap agreements

Other assets

Other liabilities

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(unaudited)

(in millions, unless otherwise indicated)

AThe ~~detailed~~following ~~description~~table ~~regarding~~presents the ~~Company's~~effect ~~use~~ of ~~derivative~~fair ~~financial~~value ~~instruments~~hedge isaccounting ~~contained~~on ~~in Note 15 to~~ the ~~audited~~ consolidated ~~financial~~ statements inof operations for the ~~Company's~~three ~~2024~~months ~~Annual~~ended ~~Report~~March 31, on2026 ~~Form~~and ~~10-K.~~ 2025:

9. STOCKHOLDERS’ EQUITY AND REDEEMABLE NONCONTROLLING INTEREST



	Three Months Ended March 31,
	2026		2025
	Interest Expense, Net		Interest Expense, Net
Total for line item in which the effects of fair value hedges are recorded	$	63	$	67

Gain (loss) on fair value hedging relationships:
Hedged items (Long-term debt)	$	13	$	(28)
Derivatives designated as hedging instruments	$	(13)	$	28

A summary of the fair values of derivative instruments in the consolidated balance sheets was as follows:


	March 31, 2026			December 31, 2025
	Balance Sheet Classification	Fair Value		Balance Sheet Classification	Fair Value
Derivatives Designated as Hedging Instruments

Fixed-to-variable interest rate swap agreements	Other assets	$	3	Other assets	$	14



	Other liabilities	$	2	Other liabilities	$	—

A detailed description regarding the Company's use of derivative financial instruments is contained in Note 15 to the audited consolidated financial statements in the Company's 2025 Annual Report on Form 10-K.

8. STOCKHOLDERS’ EQUITY AND REDEEMABLE NONCONTROLLING INTEREST

Stockholders' Equity

Changes in Accumulated Other Comprehensive Loss by Component

Comprehensive income (loss) includes:

•Foreign currency translation adjustments;

•Net deferred gains (losses) on cash flow hedges, which represent deferred gains (losses), net of tax, on interest rate-related derivative financial instruments designated as cash flow hedges, net of amounts reclassified to interest expense (see Note 87); and

•Net changes in available-for-sale debt securities, which represent unrealized holding gains (losses), net of tax, on available-for-sale debt securities.

For the three ~~and nine~~ months ended ~~September~~March 3031, ~~2025~~2026 and ~~2024~~2025, the tax effects related to the deferred gains (losses) on cash flow hedges ~~and net changes in available-for-sale debt securities~~ were not material. Foreign currency translation adjustments related to indefinite investments in non-U.S. subsidiaries are not adjusted for income taxes.

~~The changes in accumulated other comprehensive loss by component for the three and nine months ended September 30, 2025 were as follows:~~14

For the Three Months Ended September 30, 2025	ForeignCurrencyTranslationAdjustments		Net Deferred Gains on Cash Flow Hedges, net of tax		Accumulated Other Comprehensive Loss
Balance, June 30, 2025	$	(21)	$	5	$	(16)
Other comprehensive loss before reclassifications	(24)		—		(24)
Net current period other comprehensive loss	(24)		—		(24)
Balance, September 30, 2025	$	(45)	$	5	$	(40)

For the Nine Months Ended September 30, 2025	ForeignCurrencyTranslationAdjustments		Net Deferred Gains on Cash Flow Hedges, net of tax		Accumulated Other Comprehensive Loss
Balance, December 31, 2024	$	(93)	$	5	$	(88)
Other comprehensive income before reclassifications	48		—		48
Net current period other comprehensive income	48		—		48
Balance, September 30, 2025	$	(45)	$	5	$	(40)

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(unaudited)

(in millions, unless otherwise indicated)

The changes in accumulated other comprehensive loss by component for the three ~~and nine~~ months ended ~~September~~March 3031, ~~2024~~2026 were as follows:

For the Three Months Ended September 30, 2024	ForeignCurrencyTranslationAdjustments		Net Deferred Gains on Cash Flow Hedges, net of tax		Accumulated Other Comprehensive Loss
	ForeignCurrencyTranslationAdjustments		Net Deferred Gains on Cash Flow Hedges, net of tax		Accumulated Other Comprehensive Loss
Balance, June 30, 2024	$	(22)	$	3	$	(19)
Balance, December 31, 2025	$	(31)	$	4	$	(27)
Other comprehensive income before reclassifications	1		3		4
Other comprehensive loss before reclassifications	(16)		—		(16)
Net current period other comprehensive income	1		3		4
Net current period other comprehensive loss	(16)		—		(16)
Balance, September 30, 2024	$	(21)	$	6	$	(15)
Balance, March 31, 2026	$	(47)	$	4	$	(43)

For the Nine Months Ended September 30, 2024	ForeignCurrencyTranslationAdjustments		Net Deferred Gains on Cash Flow Hedges, net of tax		Accumulated Other Comprehensive Loss
Balance, December 31, 2023	$	(17)	$	3	$	(14)
Other comprehensive (loss) income before reclassifications	(4)		3		(1)
Net current period other comprehensive (loss) income	(4)		3		(1)
Balance, September 30, 2024	$	(21)	$	6	$	(15)

The changes in accumulated other comprehensive loss by component for the three months ended March 31, 2025 were as follows:


	Foreign Currency Translation Adjustments		Net Deferred Gains on Cash Flow Hedges, net of tax		Accumulated Other Comprehensive Loss

Balance, December 31, 2024	$	(93)	$	5	$	(88)
Other comprehensive income before reclassifications	5		—		5

Net current period other comprehensive income	5		—		5
Balance, March 31, 2025	$	(88)	$	5	$	(83)

Dividend Program

During ~~each of~~ the first ~~three~~quarter ~~quarters~~ of ~~2025~~2026, the Company's Board of Directors declared a quarterly cash dividend of $0.8086 per common share. During each of the four quarters of ~~2024~~2025, the Company's Board of Directors declared a quarterly cash dividend of $0.7580 per common share.

Share Repurchase Program

In February 2026, the Company's Board of Directors authorized the Company to repurchase an additional $1 billion of the Company's common stock. As of ~~September~~March 3031, ~~2025~~2026, $01.74 billion remained available under the Company’s share repurchase authorization. The share repurchase authorization has no set expiration or termination date.

Share Repurchases

For both the ~~nine~~three months ended ~~September~~March 31, 2026 and March 3031, 2025, the Company repurchased ~~0.9~~no ~~million~~ shares of its common stock ~~for $150 million~~.

For the nine months ended September 30, 2024, the Company repurchased no shares of its common stock.

Shares Reissued from Treasury Stock

For the ~~nine~~three months ended ~~September~~March 3031, ~~2025~~2026 and ~~2024~~2025, the Company reissued 10.29 million shares and 1.0.7 million shares, respectively, from treasury stock under its Employee Stock Purchase Plan and its stock-based compensation program.

For details regarding the Company's stock ownership and compensation plans, see Note 17 to the audited consolidated financial statements in the Company's ~~2024~~2025 Annual Report on Form 10-K.

1915

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – CONTINUED

(unaudited)

(in millions, unless otherwise indicated)

Redeemable Noncontrolling Interest

In connection with the sale of an 18.9% noncontrolling interest in a subsidiary to UMass on July 1, 2015, the Company granted UMass the right to require the Company to purchase all of its interest in the subsidiary at fair value commencing July 1, 2020. The subsidiary performs diagnostic information services in a defined territory within the state of Massachusetts. Since the redemption of the noncontrolling interest is outside of the Company's control, it has been presented outside of stockholders' equity at the greater of its carrying amount or its fair value. As of ~~September~~March 3031, ~~2025~~2026 and December 31, ~~2024~~2025, the redeemable noncontrolling interest was presented at its fair value. For further details regarding the fair value of the redeemable noncontrolling interest, see Note 6.

209. SUPPLEMENTAL CASH FLOW AND OTHER DATA

Supplemental cash flow and other data for the three months ended March 31, 2026 and 2025 was as follows:


	Three Months Ended March 31,
	2026		2025
Depreciation expense	$	110	$	101
Amortization expense	37		39
Depreciation and amortization expense	$	147	$	140

Interest expense	$	(65)	$	(72)
Interest income	2		5
Interest expense, net	$	(63)	$	(67)

Interest paid	$	22	$	32
Income taxes paid	$	8	$	4

Accounts payable associated with capital expenditures	$	40	$	30

Dividends payable	$	96	$	90










Leases:




Leased assets obtained in exchange for new operating lease liabilities	$	62	$	52

During the three months ended March 31, 2026 and 2025, other financing activities, net in the Company's consolidated statement of cash flows included changes in bank overdrafts, which are generally settled in cash in the short term, of $(84) million and $(61) million, respectively.

10. COMMITMENTS AND CONTINGENCIES

Letters of Credit

The Company can issue letters of credit under its secured receivables credit facility and its $750 million senior unsecured revolving credit facility. For further discussion regarding the facilities, see Note 13 to the audited consolidated financial statements in the Company's 2025 Annual Report on Form 10-K.

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(unaudited)

(in millions, unless otherwise indicated)

~~10.~~ ~~SUPPLEMENTAL~~In ~~CASH~~support ~~FLOW~~of ~~AND~~its ~~OTHER~~risk ~~DATA~~management program, $82 million in letters of credit under the secured receivables credit facility were outstanding as of March 31, 2026, providing collateral for current and future automobile liability and workers’ compensation loss payments.

Supplemental cash flow and other data for the three and nine months ended September 30, 2025 and 2024 was as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2025		2024		2025		2024
Depreciation expense	$	103	$	93	$	308	$	268
Amortization expense	39		32		117		90
Depreciation and amortization expense	$	142	$	125	$	425	$	358
Interest expense	$	(69)	$	(58)	$	(210)	$	(154)
Interest income	3		9		10		18
Interest expense, net	$	(66)	$	(49)	$	(200)	$	(136)
Interest paid	$	22	$	62	$	167	$	167
Income taxes paid	$	2	$	61	$	112	$	179
Accounts payable associated with capital expenditures	$	40	$	35	$	40	$	35
Dividends payable	$	91	$	84	$	91	$	84
Businesses acquired:
Fair value of assets acquired	$	34	$	1,725	$	57	$	2,014
Fair value of liabilities assumed	—		142		6		183
Fair value of net assets acquired	34		1,583		51		1,831
Merger consideration payable	—		—		—		—
Cash paid for business acquisitions	34		1,583		51		1,831
Less: Cash acquired	—		50		—		50
Business acquisitions, net of cash acquired	$	34	$	1,533	$	51	$	1,781
Leases:
Leased assets obtained in exchange for new operating lease liabilities	$	44	$	33	$	140	$	120

During the nine months ended September 30, 2025 and 2024, other financing activities, net in the Company's consolidated statement of cash flows included changes in bank overdrafts, which are generally settled in cash in the short term, of $(61) million and $(22) million, respectively.

During the nine months ended September 30, 2025, the Company received $46 million from a payroll tax credit under the Coronavirus Aid, Relief, and Economic Security Act associated with the retention of employees. Such amount is recorded in other operating expense, net in the Company's consolidated statement of operations.

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(unaudited)

(in millions, unless otherwise indicated)

11. COMMITMENTS AND CONTINGENCIES

Letters of Credit

The Company can issue letters of credit under its Secured Receivables Credit Facility and Senior Unsecured Revolving Credit Facility. For further discussion regarding the facilities, see Note 7 above and Note 13 to the audited consolidated financial statements in the Company's 2024 Annual Report on Form 10-K.

In support of its risk management program, $78 million in letters of credit under the Secured Receivables Credit Facility were outstanding as of September 30, 2025, providing collateral for current and future automobile liability and workers’ compensation loss payments.

Contingent Lease Obligations

The Company remains subject to contingent obligations under certain real estate leases for which no liability has been recorded. For further details, see Note 18 to the audited consolidated financial statements in the Company’s ~~2024~~2025 Annual Report on Form 10-K.

Certain Legal Matters

The Company may incur losses associated with these proceedings and investigations, but it is not possible to estimate the amount of loss or range of loss, if any, that might result from adverse judgments, settlements, fines, penalties, or other resolution of these proceedings and investigations based on the stage of these proceedings and investigations, the absence of specific allegations as to alleged damages, the uncertainty as to the certification of a class or classes and the size of any certified class, if applicable, and/or the lack of resolution of significant factual and legal issues. The Company has insurance coverage rights in place (limited in amount; subject to deductible) for certain potential costs and liabilities related to these proceedings and investigations.

In 2020, two putative class action lawsuits were filed in the U.S. District Court for New Jersey against the Company and other defendants with respect to the Company’s 401(k) plan. The complaint alleges, among other things, that the fiduciaries of the 401(k) plan breached their duties by failing to disclose the expenses and risks of plan investment options, allowing unreasonable administration expenses to be charged to plan participants, and selecting and retaining high cost and poor performing investments. In October 2020, the court consolidated the two lawsuits under the caption In re: Quest Diagnostics ERISA Litigation and plaintiffs filed a consolidated amended complaint. In May 2021, the court denied the Company's motion to dismiss the complaint. After discovery was completed, the Company filed a motion for summary judgment, which was granted. The matter is on appeal.

On June 3, 2019, the Company reported that Retrieval-Masters Creditors Bureau, Inc./American Medical Collection Agency (“AMCA”) had informed the Company and Optum360 LLC that an unauthorized user had access to AMCA’s system between August 1, 2018 and March 30, 2019 (the “AMCA Data Security Incident”). Optum360 provides revenue management services to the Company, and AMCA provided debt collection services to Optum360. AMCA first informed the Company of the AMCA Data Security Incident on May 14, 2019. AMCA’s affected system included financial information (e.g., credit card numbers and bank account information), medical information and other personal information (e.g., social security numbers). Test results were not included. Neither Optum360’s nor the Company’s systems or databases were involved in the incident. AMCA also informed the Company that information pertaining to other laboratories’ customers was also affected. Following announcement of the AMCA Data Security Incident, AMCA sought protection under the U.S. bankruptcy laws. The bankruptcy proceeding has been dismissed.

22 Numerous putative class action lawsuits were filed against the Company related to the AMCA Data Security Incident. The U.S. Judicial Panel on Multidistrict Litigation transferred the cases that were then still pending to, and consolidated them for pre-trial proceedings in, the U.S. District Court for New Jersey. In November 2019, the plaintiffs in the multidistrict proceeding filed a consolidated putative class action complaint against the Company and Optum360 that named additional individuals as plaintiffs and that asserted a variety of common law and statutory claims in connection with the AMCA Data Security Incident. In January 2020, the Company moved to dismiss the consolidated complaint; the motion to dismiss was granted in part and denied in part. Plaintiffs filed an amended complaint, which the Company also moved to dismiss. The motion was granted in part and denied in part. Discovery and class certification proceedings are ongoing.

In addition, a group of state attorney general offices are investigating the Company in connection with the AMCA Data Security Incident. The Company is cooperating with the investigation.

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(unaudited)

(in millions, unless otherwise indicated)

~~Numerous~~As ~~putative~~previously ~~class~~disclosed, ~~action~~in ~~lawsuits~~August ~~were~~2011, ~~filed against~~ the Company ~~related~~had toreceived ~~the~~a ~~AMCA~~subpoena ~~Data~~from ~~Security~~the ~~Incident. The~~ U.S. ~~Judicial~~Attorney ~~Panel~~for onthe ~~Multidistrict~~Northern ~~Litigation~~District ~~transferred~~of ~~the~~Georgia ~~cases~~seeking ~~that~~various ~~were~~business ~~then~~records, ~~still~~including ~~pending~~records related to, ~~and~~the ~~consolidated~~Company's ~~them~~compliance ~~for~~program, ~~pre-trial~~certain ~~proceedings~~marketing inmaterials, ~~the~~certain Uproduct offerings, and certain test ordering and other policies.S. ~~District~~The ~~Court~~Company ~~for~~cooperated ~~New~~with ~~Jersey~~the request. In ~~November 2019~~2021, ~~the~~a ~~plaintiffs~~third amended complaint in ~~the~~a ~~multidistrict~~qui ~~proceeding~~tam action filed ain ~~consolidated~~the ~~putative~~U.S. ~~class~~District ~~action~~Court ~~complaint~~for ~~against~~ the ~~Company~~Northern ~~and~~District ~~Optum360~~of ~~that~~Georgia ~~named~~was ~~additional~~unsealed, ~~individuals~~which asis ~~plaintiffs~~related ~~and~~to ~~that~~the ~~asserted~~matter aunderlying ~~variety~~the ofAugust ~~common~~2011 ~~law~~subpoena. ~~and~~Both ~~statutory~~the ~~claims~~U.S. inDepartment ~~connection~~of ~~with~~Justice and the ~~AMCA~~State ~~Data~~of ~~Security~~Georgia ~~Incident. In~~declined ~~January~~to ~~2020,~~intervene in the action. The Company moved to dismiss the ~~consolidated~~ complaint; and the ~~motion~~complaint ~~to dismiss~~ was ~~granted~~dismissed inwithout ~~part~~prejudice ~~and denied~~ in ~~part~~August 2022. ~~Plaintiffs~~The relator subsequently filed ana fourth amended complaint, which the Company ~~also~~has moved to dismiss. On ~~The~~August ~~motion~~23, ~~was~~2024, ~~granted~~the indistrict ~~part~~court ~~and~~dismissed ~~denied~~the incomplaint ~~part~~with prejudice. ~~Discovery~~On ~~and~~appeal, ~~class~~the ~~certification~~Eleventh ~~proceedings~~Circuit ~~are~~affirmed ~~ongoing~~the district court's dismissal. The relator filed a petition for certiorari with the U.S. Supreme Court, which was denied.

InThe ~~addition,~~Company aalso ~~group~~received subpoenas from the U.S. Attorney for the District of ~~state~~New ~~attorney~~Jersey ~~general~~(the ~~offices~~“NJ ~~are~~USAO”). ~~investigating~~The subpoenas seek various records relating to the Company’s inrelationship ~~connection~~ with the ~~AMCA~~New ~~Data~~York ~~Security~~Giants ~~Incident~~and adherence to certain company policies and federal laws. The Company issettled ~~cooperating~~the matter with the ~~investigation~~NJ USAO and agreed to enter into a Corporate Integrity Agreement with the Office of Inspector General of the United States Department of Health and Human Services. The Company has also received several subpoenas from the New York Attorney General’s Office, and is in the process of responding to them.

The Company is subject to a putative class action entitled Cole, et al. v Quest Diagnostics Incorporated, which was filed in the U. S. District Court for the Eastern District of California, for allegedly conspiring with Facebook to track customers’ internet communications on Company web platforms without authorization, in violation of the California Invasion of Privacy Act ("CIPA") and the California Confidentiality of Medical Information Act ("CMIA"). The complaint alleged that the Company’s actions were an invasion of privacy and contributed to a loss of value in plaintiffs’ personally identifiable information. The Company moved to dismiss the case or, in the alternative, transfer venue to the U.S. District Court for New Jersey. Subsequently, plaintiffs filed an amended complaint, which the Company also moved to dismiss. The Company's motion to transfer the case was granted. The Company refiled its motion to dismiss with the New Jersey District Court. The motion to dismiss was granted without prejudice as to the CMIA claim and denied as to the CIPA claim. Thereafter, the Company filed a motion for reconsideration as to the CIPA claim, which was granted. The matter is on appeal.

As previously disclosed, in August 2011, the Company had received a subpoena from the U.S. Attorney for the Northern District of Georgia seeking various business records, including records related to the Company's compliance program, certain marketing materials, certain product offerings, and certain test ordering and other policies. The Company cooperated with the request. In 2021, a third amended complaint in a qui tam action filed in the U.S. District Court for the Northern District of Georgia was unsealed, which is related to the matter underlying the August 2011 subpoena. Both the U.S. Department of Justice and the State of Georgia declined to intervene in the action. The Company moved to dismiss the complaint and the complaint was dismissed without prejudice in August 2022. The relator subsequently filed a fourth amended complaint, which the Company has moved to dismiss. On August 23, 2024, the district court dismissed the complaint with prejudice. On appeal, the Eleventh Circuit affirmed the district court's dismissal.

The Company also received subpoenas from the U.S. Attorney for the District of New Jersey (the “NJ USAO”). The subpoenas seek various records relating to the Company’s relationship with the New York Giants ("the Giants") and adherence to certain company policies and federal laws. The Company is in the process of finalizing a settlement with the NJ USAO and is negotiating a resolution with the United States Department of Health and Human Services. The Company has also received a subpoena from the New York Attorney General’s Office.

The Company has also received subpoenas from the New York Attorney General’s Office that seek information about, among other things, the ordering and billing of certain test panels to Medicaid programs in New York. The Company is cooperating with the investigation.

The Company also received a Civil Investigative Demand from the Texas Attorney General’s Office requesting documents related to its billing to Texas Medicaid. The Company is cooperating with this request.

Other Legal Matters

In the normal course of business, the Company has been named, from time to time, as a defendant in various legal actions, including arbitrations, class actions and other litigation, arising in connection with the Company's activities as a provider of diagnostic testing, information and services. These actions could involve claims for substantial compensatory and/or punitive damages or claims for indeterminate amounts of damages, and could have an adverse impact on the Company's client base and reputation.

The Company is also involved, from time to time, in other reviews, investigations and proceedings by governmental agencies regarding the Company's business which may result in adverse judgments, settlements, fines, penalties, injunctions or other relief.

23 The federal or state governments may bring claims based on the Company's current practices, which it believes are lawful. In addition, certain federal and state statutes, including the qui tam provisions of the federal False Claims Act, allow private individuals to bring lawsuits against healthcare companies on behalf of government or private payers. The Company is aware of lawsuits, and from time to time has received subpoenas, related to billing or other practices based on the False Claims Act or other federal and state statutes, regulations or other laws. The Company understands that there may be other pending qui tam claims brought by former employees or other "whistleblowers" as to which the Company cannot determine the extent of any potential liability.

Management cannot predict the outcome of such matters. Although management does not anticipate that the ultimate outcome of such matters will have a material adverse effect on the Company's financial condition, given the high degree of judgment involved in establishing loss estimates related to these types of matters, the outcome of such matters may be material to the Company's consolidated results of operations or cash flows in the period in which the impact of such matters is determined or paid.

These matters are in different stages. Some of these matters are in their early stages. Matters may involve responding to and cooperating with various government investigations and related subpoenas. As of March 31, 2026, the Company does not believe that material losses related to legal matters are probable.

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(unaudited)

(in millions, unless otherwise indicated)

~~The~~Reserves ~~federal~~for orlegal ~~state~~matters ~~governments~~totaled ~~may~~$20 ~~bring~~million ~~claims~~as ~~based on the Company's current practices, which it believes are lawful. In addition, certain federal and state statutes, including the qui tam provisions~~ of ~~the~~both ~~federal False Claims Act~~March 31, ~~allow~~2026 ~~private individuals to bring lawsuits against healthcare companies on behalf of government or private payers. The Company is aware of lawsuits,~~ and ~~from time to time has received subpoenas~~December 31, ~~related to billing or other practices based on the False Claims Act or other federal and state statutes, regulations or other laws~~2025. The Company understands that there may be other pending qui tam claims brought by former employees or other "whistleblowers" as to which the Company cannot determine the extent of any potential liability.

These matters are in different stages. Some of these matters are in their early stages. Matters may involve responding to and cooperating with various government investigations and related subpoenas. As of September 30, 2025, the Company does not believe that material losses related to legal matters are probable.

Reserves for legal matters totaled $21 million and $4 million as of September 30, 2025 and December 31, 2024, respectively.

Reserves for General and Professional Liability Claims

As a general matter, providers of clinical testing services may be subject to lawsuits alleging negligence or other similar legal claims. These suits could involve claims for substantial damages. Any professional liability litigation could also have an adverse impact on the Company's client base and reputation. The Company maintains various liability insurance coverages for, among other things, claims that could result from providing, or failing to provide, clinical testing services, including inaccurate testing results, and other exposures. The Company's insurance coverage limits its maximum exposure on individual claims; however, the Company is essentially self-insured for a significant portion of these claims.

The Company is subject to a series of individual claims brought by persons in Ireland related to allegations stemming from pap smear screening services performed by the Company. In general, claimants have alleged that the results of certain pap smear screening tests performed by the Company and other providers, pursuant to a program coordinated by the Irish government, were incorrect for individuals who were later diagnosed with cervical cancer. The Irish government and an independent scoping inquiry commissioned by the Irish government found that the Company’s performance of its screening services for the Irish cervical cancer screening program were in accordance with both Ireland’s requirements and international standards. The Company has settled claims made by certain individuals, is a party in multiple lawsuits and may be served as a party in additional lawsuits. The Company does not believe that the resolution of existing or future claims will have a material adverse effect on its financial position or liquidity, but the ultimate outcomes of these claims are unpredictable and subject to significant uncertainties.

Reserves for general and professional liability claims matters, including those associated with both asserted and incurred but not reported claims, are established on an undiscounted basis by considering actuarially determined losses based upon the Company's historical and projected loss experience. Such reserves totaled $~~169~~173 million and $178 million as of ~~both September~~March 3031, ~~2025~~2026 and December 31, ~~2024~~2025, respectively.

While the basis for claims reserves is actuarially determined losses based upon the Company's historical and projected loss experience, the process of analyzing, assessing and establishing reserve estimates relative to these types of claims involves a high degree of judgment. Although the Company believes that its present reserves and insurance coverage are sufficient to cover currently estimated exposures, it is possible that the Company may incur liabilities in excess of its recorded reserves or insurance coverage. Changes in the facts and circumstances associated with claims could have a material impact on the Company’s results of operations (principally costs of services), cash flows and financial condition in the period that reserve estimates are adjusted or paid.

24 11. BUSINESS SEGMENT INFORMATION

The Company's DIS business is the only reportable segment based on the manner in which the Chief Executive Officer, who is the Company's Chief Operating Decision Maker ("CODM"), assesses performance and allocates resources across the organization. The CODM uses the reported measurement of segment profit (loss) in assessing segment performance versus budget and when deciding how to allocate resources to segments. The DIS business provides diagnostic information services to a broad range of customers within its primary customer channels - physicians, hospitals, and patients and consumers. The DIS business accounted for greater than 95% of net revenues in both 2026 and 2025.

All other operating segments include the Company's DS businesses, which consist of its risk assessment services and healthcare information technology businesses. The Company's DS businesses offer solutions for insurers and offer solutions for healthcare providers and payers.

As of March 31, 2026, substantially all of the Company’s services were provided within the United States, and substantially all of the Company’s assets were located within the United States.

The following table is a summary of segment information for the three months ended March 31, 2026 and 2025. Segment asset information is not presented since it is not received by the CODM at the operating segment level. The CODM regularly reviews certain consolidated expenses, including employee compensation costs. "Other segment items" principally consist of costs for obtaining, transporting and testing specimens, facility costs used for the delivery of the Company's services,

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(unaudited)

(in millions, unless otherwise indicated)

costs 12associated with the Company's sales and marketing efforts, and costs related to billing operations. ~~BUSINESS~~ Operating ~~SEGMENT~~income ~~INFORMATION~~(loss) of each segment represents net revenues less directly identifiable expenses. General corporate activities included in the table below are comprised of general management and administrative corporate expenses, amortization and impairment of intangibles assets and other operating income and expenses, net of certain general corporate activity costs that are allocated to the DIS and DS businesses. The accounting policies of the segments are the same as those of the Company as set forth in Note 2 to the audited consolidated financial statements contained in the Company’s 2025 Annual Report on Form 10-K and Note 2 to the interim unaudited consolidated financial statements.


	Three Months Ended
	March 31, 2026
	DIS		Total
Net revenues	$	2,832	$	2,832
DS revenues			63
Total net revenues			$	2,895

Less: Other segment items	2,375
Segment operating income	$	457	$	457
DS operating income			7
General corporate activities			(65)
Total operating income			399
Non-operating expense, net			(65)
Income before income taxes and equity in earnings of equity method investees			334
Income tax expense			(74)
Equity in earnings of equity method investees, net of taxes			4
Net income			264
Less: Net income attributable to noncontrolling interests			12
Net income attributable to Quest Diagnostics			$	252


	Three Months Ended
	March 31, 2025
	DIS		Total
Net revenues	$	2,589	$	2,589
DS revenues			63
Total net revenues			$	2,652

Less: Other segment items	2,175
Segment operating income	$	414	$	414
DS operating income			8
General corporate activities			(76)
Total operating income			346
Non-operating expense, net			(70)
Income before income taxes and equity in earnings of equity method investees			276
Income tax expense			(59)
Equity in earnings of equity method investees, net of taxes			18
Net income			235
Less: Net income attributable to noncontrolling interests			15
Net income attributable to Quest Diagnostics			$	220

As of September 30, 2025, substantially all of the Company’s services were provided within the United States, and substantially all of the Company’s assets were located within the United States. See Note 6 to the audited consolidated financial statements contained in the Company’s 2024 Annual Report on Form 10-K for a discussion of the Company's acquisition of LifeLabs in Canada during August 2024.20

The following table is a summary of segment information for the three and nine months ended September 30, 2025 and 2024. Segment asset information is not presented since it is not received by the CODM at the operating segment level. The CODM regularly reviews certain consolidated expenses, including employee compensation costs. "Other segment items" principally consist of costs for obtaining, transporting and testing specimens, facility costs used for the delivery of the Company's services, costs associated with the Company's sales and marketing efforts, and costs related to billing operations. Operating income (loss) of each segment represents net revenues less directly identifiable expenses. General corporate activities included in the table below are comprised of general management and administrative corporate expenses, amortization and impairment of intangibles assets and other operating income and expenses, net of certain general corporate activity costs that are allocated to the DIS and DS businesses. The accounting policies of the segments are the same as those of the Company as set forth in Note 2 to the audited consolidated financial statements contained in the Company’s 2024 Annual Report on Form 10-K and Note 2 to the interim unaudited consolidated financial statements.

	Three Months Ended		Nine Months Ended
	September 30, 2025		September 30, 2025
	DIS		Total		DIS		Total
Net revenues	$	2,755	$	2,755	$	8,043	$	8,043
DS revenues			61				186
Total net revenues			$	2,816			$	8,229
Less: Other segment items	2,273				6,653
Segment operating income	$	482	$	482	$	1,390	$	1,390
DS operating income			9				24
General corporate activities			(105)				(244)
Total operating income			386				1,170
Non-operating expense, net			(58)				(182)
Income before income taxes and equity in earnings of equity method investees			328				988
Income tax expense			(77)				(233)
Equity in earnings of equity method investees, net of taxes			8				35
Net income			259				790
Less: Net income attributable to noncontrolling interests			14				43
Net income attributable to Quest Diagnostics			$	245			$	747

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QUEST DIAGNOSTICS INCORPORATED AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – CONTINUED

(unaudited)

(in millions, unless otherwise indicated)

	Three Months Ended		Nine Months Ended
	September 30, 2024		September 30, 2024
	DIS		Total		DIS		Total
Net revenues	$	2,427	$	2,427	$	7,058	$	7,058
DS revenues			61				193
Total net revenues			$	2,488			$	7,251
Less: Other segment items	2,020				5,858
Segment operating income	$	407	$	407	$	1,200	$	1,200
DS operating income			6				23
General corporate activities			(83)				(238)
Total operating income			330				985
Non-operating expense, net			(34)				(109)
Income before income taxes and equity in earnings of equity method investees			296				876
Income tax expense			(65)				(205)
Equity in earnings of equity method investees, net of taxes			6				14
Net income			237				685
Less: Net income attributable to noncontrolling interests			11				36
Net income attributable to Quest Diagnostics			$	226			$	649

Depreciation and amortization expense for the three months ended March 31, 2026 and 2025 was as follows:

Depreciation and amortization expense for the three and nine months ended September 30, 2025 and 2024 was as follows:


	Three Months Ended March 31,
	2026		2025

DIS business	$	106	$	97
All other operating segments	3		4
General corporate	38		39
Total depreciation and amortization	$	147	$	140

	Three Months Ended September 30,				Nine Months Ended September 30,
	2025		2024		2025		2024
DIS business	$	99	$	90	$	296	$	258
All other operating segments	3		3		10		9
General corporate	40		32		119		91
Total depreciation and amortization	$	142	$	125	$	425	$	358

12. REVENUE RECOGNITION

13. REVENUE RECOGNITION

DIS

Net revenues in the Company’s DIS business accounted for over 9795% of the Company’s total net revenues for the three ~~and nine~~ months ended ~~September~~March 3031, ~~2025~~2026 and ~~2024~~2025 and are primarily comprised of a high volume of relatively low-dollar transactions. The DIS business, which provides clinical testing services and other services, satisfies its performance obligations and recognizes revenues primarily upon completion of the testing process (when results are reported) or when services have been rendered. The Company estimates the amount of consideration it expects to be entitled to receive from payer customer groups in exchange for providing services using the portfolio approach. These estimates include the impact of contractual allowances (including payer denials), and patient price concessions. The portfolios determined using the portfolio approach consist of the following groups of payer customers: healthcare insurers, government payers (including Medicare and Medicaid programs), client payers and patients.

26 For further details regarding revenue recognition in the Company's DIS business, see Note 3 to the audited consolidated financial statements in the Company's 2025 Annual Report on Form 10-K.

The Company’s DS businesses primarily satisfy their performance obligations and recognize revenues when delivery has occurred or services have been rendered.

Net Revenue and Net Accounts Receivable by Payer Customer Type

The approximate percentage of net revenue by type of payer customer was as follows:

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QUEST DIAGNOSTICS INCORPORATED AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – CONTINUED

(unaudited)

(in millions, unless otherwise indicated)

For further details regarding revenue recognition in the Company's DIS business, see Note 3 to the audited consolidated financial statements in the Company's 2024 Annual Report on Form 10-K.


	Three Months Ended March 31,
	2026		2025
Healthcare insurers:
Fee-for-service	33	%	35	%
Capitated	3		3
Total healthcare insurers	36		38
Government payers (principally fee-for-service)	16		16
Client payers	32		31
Patients (including coinsurance and deductible responsibilities)	14		13
Total DIS	98		98
DS	2		2
Net revenues	100	%	100	%

The Company’s DS businesses primarily satisfy their performance obligations and recognize revenues when delivery has occurred or services have been rendered.

Net Revenue and Net Accounts Receivable by Payer Customer Type

The approximate percentage of net revenue by type of payer customer was as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2025		2024		2025		2024
Healthcare insurers:
Fee-for-service	37	%	38	%	36	%	37	%
Capitated	2		3		3		3
Total healthcare insurers	39		41		39		40
Government payers (principally fee-for-service)	16		13		16		12
Client payers	31		33		31		33
Patients (including coinsurance and deductible responsibilities)	12		10		12		12
Total DIS	98		97		98		97
DS	2		3		2		3
Net revenues	100	%	100	%	100	%	100	%

The approximate percentage of net accounts receivable by type of payer customer was as follows:

	September 30, 2025		December 31, 2024
	March 31, 2026		December 31, 2025
Healthcare Insurers	2927	%	2627	%
Government Payers	98		78
Client Payers	4143		4543
Patients (including coinsurance and deductible responsibilities)	1920		20
Total DIS	98		98
DS	2		2
Net accounts receivable	100	%	100	%

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

Our Company

Diagnostic Information Services

Quest Diagnostics works across the healthcare ecosystem to create a healthier world, one life at a time. Our diagnostic information services ("DIS") business provides diagnostic insights from the results of our laboratory testing to empower people, physicians, and organizations to take action to improve health outcomes. Derived from one of the world's largest databases of de-identifiable clinical lab results, our diagnostic insights reveal new avenues to identify and treat disease, inspire healthy behaviors and improve healthcare management. In the right hands and with the right context, our diagnostic insights can inspire actions that transform lives and create a healthier world. We provide services to a broad range of customers within our primary customer channels - physicians (including those associated with accountable care organizations and Federally Qualified Health Centers), hospitals, and patients and consumers. Our other customers include health plans, employers, emerging retail healthcare providers, government agencies, pharmaceutical companies and other commercial clinical laboratories. We offer broad access to clinical testing through a nationwide network of laboratories, patient service centers, phlebotomists in physician offices, and our connectivity resources, including call centers and mobile phlebotomists, nurses and other health and wellness professionals. Our large in-house staff of medical and scientific experts, including medical directors, scientific directors, genetic counselors and board-certified geneticists, provide medical and scientific consultation to healthcare providers and patients regarding our tests and test results, and help them best utilize our services to improve outcomes and enhance satisfaction. Our DIS business makes up greater than 9795% of our consolidated net revenues.

We assess our revenue performance for our DIS business based upon, among other factors, volume (measured by test requisitions) and revenue per requisition. Each test requisition accompanies patient specimens, indicating the test(s) to be performed and the party to be billed for the test(s). Revenue per requisition is impacted by various factors, including, among other items, the impact of fee schedule changes (i.e., unit price), test mix, payer mix, business mix and the number of tests per requisition. Management uses number of requisitions and revenue per requisition data to assist with assessing the growth and performance of the business, including understanding trends affecting number of requisitions, pricing and test mix. Therefore, we believe that information related to changes in these metrics from period to period are useful information for investors as it allows them to assess the performance of the business.

Diagnostic Solutions

Our diagnostic solutions ("DS") group, which represents the balance of our consolidated net revenues, includes our risk assessment services business, which offers solutions for insurers, and our healthcare information technology businesses, which offer solutions for healthcare providers and payers.

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~~Third~~First Quarter Highlights

Three Months Ended September 30,

Three Months Ended March 31,

2025

2024

2026

2025

(dollars in millions, except per share data)

Net revenues

$2,~~816~~895

$2,~~488~~652

DIS revenues

$2,~~755~~832

$2,~~427~~589

Revenue per requisition change

0(1.83)%

30.3%

Requisition volume change

1210.59%

512.54%

Organic requisition volume change

310.98%

(0.59)%

DS revenues

$6163

Operating income

$~~386~~399

$~~330~~346

Net income attributable to Quest Diagnostics

$~~245~~252

$~~226~~220

Diluted earnings per share

$2.1624

$1.9994

Net cash provided by operating activities

$~~563~~278

$~~356~~314

Capital expenditures

$~~144~~114

$~~106~~117

For further discussion of the year-over-year changes for the three months ended ~~September~~March 3031, ~~2025~~2026 compared to the three months ended ~~September~~March 3031, ~~2024~~2025, see "Results of Operations" below.

~~Acquisition~~Venture ofwith ~~select~~Corewell ~~clinical testing assets of Spectra Laboratories~~Health

OnDuring August 4, 2025, we ~~acquired~~and ~~select~~Corewell ~~clinical~~Health signed a definitive agreement to form a new entity which will perform laboratory testing ~~assets~~in the state of ~~Fresenius~~Michigan ~~Medical~~via ~~Care's~~a ~~wholly-owned~~new ~~Spectra~~laboratory ~~Laboratories~~facility. The inparties ancompleted ~~all-cash~~the transaction ~~for~~during ~~$34~~January ~~million~~2026. In ~~The~~connection ~~acquired~~with ~~business~~the istransaction, ~~included~~Corewell inHealth ~~our~~contributed ~~DIS~~a laboratory business over which we obtained a controlling financial interest. ~~See~~Under ~~Note~~the 5terms of the transaction, the parties are continuing to serve providers and patients in Michigan from their existing patient service centers (which are operated by the ~~interim~~newly ~~unaudited~~formed entity) and their existing laboratories until a new laboratory is operational during 2027. Equity ownership of the newly formed entity is shared 51% by us and 49% by Corewell Health and we are consolidating the entity in our consolidated financial statements. The ~~for~~business ~~further~~is ~~discussion~~included in our DIS segment.

For further details see Note 5 to the interim unaudited consolidated financial statements.

Invigorate Program

We are engaged in a multi-year program called Invigorate, which includes structured plans to drive savings and improve productivity across the value chain, including in such areas as patient services, logistics and laboratory operations, revenue services, information technology and procurement. The Invigorate program aims to deliver 3% annual cost savings and productivity improvements to partially offset pressures from the current inflationary environment, including labor and benefit cost increases and reimbursement pressures. We are leveraging automation and artificial intelligence to improve productivity and also improve quality across our entire value chain, not just in the laboratory. Other areas of focus include reducing denials and patient concessions, enhancing the digital experience, and selecting and retaining talent.

For the ~~nine~~three months ended ~~September~~March 3031, ~~2025~~2026, we incurred $377 million of pre-tax charges in connection with restructuring and integration activities, principally including ~~$18 million of~~ employee separation costs, with the remainder including integration costs. Most of the charges will result in cash expenditures. Additional restructuring and integration charges may be incurred in future periods, including as we identify additional opportunities to achieve further savings and productivity improvements.

Outlook and Trends

In July 2025, the One Big Beautiful Bill Act (“OBBBA”) was enacted. The OBBBA and other possible legislation is expected to impact healthcare providers in the United States, including us, primarily through changes to Medicaid and the Affordable Care Act (“ACA”). These changes could lead to reduced funding, increased regulatory burdens and potential shifts in patient populations among payer types and utilization. Additional federal and state guidance is expected to be issued in order to implement the various provisions of the OBBBA, many of which have effective dates in 2027 and 2028. In addition, if Congress does not act to extend the enhanced Premium Tax Credits (“PTC”) that were part of the Inflation Reduction Act of 2022, which have helped drive an increase in Individual Public Exchange enrollment, they will expire at the end of 2025 and could also have an impact on patient populations and result in shifts among payer types and utilization.

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Revenues generated under Medicaid and managed Medicaid programs, and through the ACA related Exchange Plans, represented approximately 8% and less than 5%, respectively, of consolidated revenues for 2024. Based on the provisions of the new legislation (including various effective dates), we currently believe that the OBBBA, and expiration of the enhanced PTCs, are not likely to have a material impact on our consolidated revenues for 2025 and 2026. In addition, we currently estimate that for 2026 through 2028 the OBBBA and the planned expiration of the enhanced PTCs at the end of 2025 could reduce our consolidated revenues by up to 50-60 basis points by 2028, compared to 2025, primarily reflecting the impact on our ACA related Exchange Plans revenues.

While the impacts outlined above represent our current estimates, we continue to assess the impact of the OBBBA and the planned expiration of the enhanced PTCs on our outlook for the remainder of 2025 through 2028.

The OBBBA also makes permanent key elements of the Tax Cuts and Jobs Act of 2017, including 100% bonus depreciation, domestic research cost expensing and the business interest expense limitation, among other tax changes. Many of the tax provisions of the OBBBA are designed to accelerate tax deductions, which could lead to lower cash tax payments. The new legislation has multiple effective dates, with certain provisions effective in 2025 and others in the future. While we continue to assess the impact of the tax provisions of the OBBBA on our consolidated financial statements, we currently believe that the tax provisions of the legislation are not expected to have a material impact on our statement of operations. Our consolidated deferred income tax liabilities as of September 30, 2025 and December 31, 2024 were $378 million and $278 million, respectively. The increase was principally due to the domestic research cost expensing and bonus depreciation elements of the OBBBA.

For additional discussion regarding regulatory trends and uncertainties, and the risk factors that could cause actual results to differ materially from those described above, see Part I, Item 1, “Business – The Clinical Testing Industry,” and “Business – Regulation”, Part I, Item 1A, “Risk Factors” and the “Outlook and Trends” section of Part II, Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations” included in our 2024 Annual Report on Form 10-K.

Critical Accounting Policies

There have been no significant changes to our critical accounting policies from those disclosed in our ~~2024~~2025 Annual Report on Form 10-K.

Impact of New Accounting Standards

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The adoption of new accounting standards, if any, is discussed in Note 2 to the interim unaudited consolidated financial statements.

The impact of recent accounting pronouncements not yet effective on our consolidated financial statements, if any, is also discussed in Note 2 to the interim unaudited consolidated financial statements.

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Results of Operations

The following tables set forth certain results of operations data for the periods presented:

	Three Months Ended September 30,										Nine Months Ended September 30,
	Three Months Ended March 31,
	2025			2024			$ Change		% Change		2025			2024			$ Change		% Change
	2026			2025			$ Change		% Change
	(dollars in millions, except per share amounts)
Net revenues:
DIS business	$	2,~~755~~832		$	2,~~427~~589		$	~~328~~243	139.54	%	$	~~8,043~~		$	~~7,058~~		$	~~985~~	~~14.0~~	%
DS businesses	6163			6163			—		~~(1.~~0).8		~~186~~			~~193~~			~~(7)~~		~~(4.0)~~
Total net revenues	$	2,~~816~~895		$	2,~~488~~652		$	~~328~~243	139.12	%	$	~~8,229~~		$	~~7,251~~		$	~~978~~	~~13.5~~	%
Operating costs and expenses and other operating income:
Cost of services	$	1,~~867~~953		$	1,~~677~~789		$	~~190~~164	119.32	%	$	~~5,474~~		$	~~4,865~~		$	~~609~~	~~12.5~~	%
Selling, general and administrative	~~501~~504			~~448~~476			5328		126.0		~~1,463~~			~~1,304~~			~~159~~		~~12.2~~
Amortization of intangible assets	3937			3239			7(2)		21(3.29)		~~117~~			90			27		~~29.0~~
Other operating expense, net	232			12			22—		NM		5			7			~~(2)~~		NM
Total operating costs and expenses, net	$	2,~~430~~496		$	2,~~158~~306		$	~~272~~190	128.62	%	$	~~7,059~~		$	~~6,266~~		$	~~793~~	~~12.6~~	%
Operating income	$	~~386~~399		$	~~330~~346		$	5653	1615.85	%	$	~~1,170~~		$	~~985~~		$	~~185~~	~~18.7~~	%
Other income (expense):
Interest expense, net	$	(6663)		$	(4967)		$	~~(17)~~4	37(6.20)	%	$	~~(200)~~		$	~~(136)~~		$	~~(64)~~	~~47.7~~	%
Other income, net	8			15			(7)		NM		18			27			(9)		NM
Other expense, net	(2)			(3)			1		NM
Total non-operating expense, net	$	(5865)		$	(3470)		$	~~(24)~~5	NM		$	~~(182)~~		$	~~(109)~~		$	~~(73)~~	NM
Income tax expense	$	(7774)		$	(6559)		$	(1215)	1924.15	%	$	~~(233)~~		$	~~(205)~~		$	~~(28)~~	~~13.7~~	%
Effective income tax rate	2322.62		%	21.95		%					~~23.6~~		%	~~23.4~~		%
Equity in earnings of equity method investees, net of taxes	$	8		$	6		$	2	NM		$	35		$	14		$	21	NM
									0
Net income attributable to Quest Diagnostics	$	245		$	226		$	19	8.5	%	$	747		$	649		$	98	15.0	%
Equity in earnings of equity method investees, net of taxes	$	4		$	18		$	(14)	(77.5)	%
Diluted earnings per common share attributable to Quest Diagnostics' common stockholders	$	2.16		$	1.99		$	0.17	8.5	%	$	6.57		$	5.74		$	0.83	14.5	%
Net income attributable to Quest Diagnostics	$	252		$	220		$	32	14.4	%
Diluted earnings per common share attributable to Quest Diagnostics' common stockholders	$	2.24		$	1.94		$	0.30	15.5	%
NM - Not Meaningful

The following table sets forth certain results of operations data as a percentage of net revenues for the periods presented:

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	Three Months Ended September 30,				Nine Months Ended September 30,
	Three Months Ended March 31,
	2025		2024		2025		2024
	2026		2025
Net revenues:
DIS business	97.8	%	97.56	%	~~97.7~~	%	~~97.3~~	%
DS businesses	2.2		2.54		~~2.3~~		~~2.7~~
Total net revenues	100.0	%	100.0	%	~~100.0~~	%	~~100.0~~	%
Operating costs and expenses and other operating income:
Cost of services	6667.34	%	67.35	%	~~66.5~~	%	~~67.1~~	%
Selling, general and administrative	17.84		1817.09		~~17.8~~		~~18.0~~
Amortization of intangible assets	1.43		1.35		~~1.4~~		~~1.2~~
Other operating expense, net	0.81		0.1		~~0.1~~		~~0.1~~
Total operating costs and expenses, net	86.32	%	8687.70	%	~~85.8~~	%	~~86.4~~	%
Operating income	13.78	%	13.30	%	~~14.2~~	%	~~13.6~~	%

Operating Results

Results for the three months ended ~~September~~March 3031, ~~2025~~2026 were affected by certain items that on a net basis decreased diluted earnings per share by $0.4426 as follows:

•pre-tax amortization expense of $3937 million, recorded in amortization of intangible assets, or $0.25 per diluted share;

•pre-tax charges of $227 million, principally recorded in ~~other~~equity ~~operating~~in ~~expense~~earnings of equity method investees, net of taxes, or $0.1505 per diluted share, ~~comprised~~representing ~~of a $15 million charge to earnings related to legal matters, a $5 million impairment charge on certain long-lived assets related to~~ the ~~exit of a business and, to a lesser extent,~~ losses associated with ~~the~~changes ~~increase~~ in the ~~fair~~carrying value of ~~the~~our ~~contingent~~strategic ~~consideration accrual associated with previous acquisitions~~investments; ~~and~~

•pre-tax charges of $117 million ($1 million recorded in cost of services and $106 million recorded in selling, general and administrative expenses), or $0.0704 per diluted share, primarily associated with workforce reductions and integration costs incurred in connection with further restructuring and integrating our business; ~~partially offset by~~ and

•$3pre-tax ~~million~~charges of ~~excess~~$4 ~~tax benefits associated with stock-based compensation arrangements~~million, principally recorded in ~~income~~other ~~tax~~operating expense, net, or $0.03 per diluted share., primarily representing a loss associated with the increase in the fair value of the contingent consideration accrual associated with previous acquisitions; partially offset by

~~Results~~•$12 ~~for~~million ~~the~~of ~~nine~~excess ~~months~~tax ~~ended~~benefits ~~September 30,~~associated ~~2025~~with ~~were~~stock-based ~~affected~~compensation byarrangements, ~~certain~~recorded ~~items~~in ~~that~~income ontax aexpense, ~~net~~or ~~basis~~$0.11 ~~decreased~~per diluted ~~earnings per~~ share ~~by $0~~.~~86 as follows:~~

~~•pre-tax~~ Results ~~amortization~~for ~~expense~~the ofthree ~~$117~~months ~~million~~ended ~~recorded~~March 31, in2025 ~~amortization~~were ofaffected ~~intangible~~by ~~assets,~~certain oritems ~~$0.76~~that ~~per~~on a net basis decreased diluted earnings per share; by $0.27 as follows:

•pre-tax ~~charges~~amortization expense of $5239 million, recorded in ~~other~~amortization ~~operating~~of ~~expense,~~intangible ~~net~~assets, or $0.3626 per diluted share, primarily comprised of a $29 million impairment charge on certain long-lived assets related to the exit of a business, a $15 million charge to earnings related to legal matters and, to a lesser extent, losses associated with the increase in the fair value of the contingent consideration accrual associated with previous acquisitions; ~~and~~

•pre-tax charges of $3719 million ($86 million recorded in cost of services and $2913 million recorded in selling, general and administrative expenses), or $0.2413 per diluted share, primarily associated with workforce reductions and integration costs incurred in connection with further restructuring and integrating our business; ~~partially offset by~~ and

•pre-tax ~~gains~~charges of $542 million, ~~($46 million~~ recorded in other operating expense, net ~~and $8 million recorded in equity in earnings of equity method investees~~, ~~net of taxes),~~ or $0.3602 per diluted share, ~~from~~primarily representing a ~~$46 million~~loss ~~payroll tax credit under the Coronavirus Aid, Relief, and Economic Security Act ("CARES Act")~~ associated with the ~~retention~~increase ofin ~~employees~~the ~~and,~~fair tovalue aof ~~lesser~~the ~~extent,~~contingent anconsideration $8accrual ~~million~~associated ~~non-recurring~~with ~~gain~~previous ~~related~~acquisitions; topartially aoffset ~~lease;~~by

•pre-tax gains of $~~2 million~~8 ~~($1~~ million ~~recorded in other income~~, ~~net and $1 million~~ recorded in equity in earnings of equity method investees, net of taxes), or $0.0106 per diluted share, ~~representing~~principally ~~net~~consisting ~~gains~~of ~~associated~~a ~~with~~non-recurring ~~changes~~gain inrelated ~~the~~to ~~carrying~~a ~~value of our strategic investments~~lease; and

•$159 million of excess tax benefits associated with stock-based compensation arrangements, recorded in income tax expense, or $0.1308 per diluted share.

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Results for the three months ended September 30, 2024 were affected by certain items that on a net basis decreased diluted earnings per share by $0.31 as follows:

•pre-tax amortization expense of $32 million recorded in amortization of intangible assets, or $0.21 per diluted share;

•pre-tax net charges of $18 million ($5 million recorded in cost of services and $15 million recorded in selling, general and administrative expenses, partially offset by a $2 million gain recorded in other operating expense, net), or $0.13 per diluted share, primarily associated with workforce reductions and integration costs incurred in connection with further restructuring and integrating our business;

•pre-tax charges of $5 million ($1 million recorded in selling, general and administrative expenses and $4 million recorded in other operating expense, net), or $0.04 per diluted share, primarily representing a loss associated with the increase in the fair value of the contingent consideration accrual associated with previous acquisitions; and

•pre-tax charges of $2 million recorded in equity in earnings of equity method investees, net of taxes, or $0.02 per diluted share, representing net losses associated with changes in the carrying value of our strategic investments; partially offset by

•a pre-tax gain of $8 million, recorded in other income, net, or $0.06 per diluted share, representing a non-recurring gain associated with a foreign exchange forward contract utilized in conjunction with an acquisition, and

•$3 million of excess tax benefits associated with stock-based compensation arrangements, recorded in income tax expense, or $0.03 per diluted share.

Results for the nine months ended September 30, 2024 were affected by certain items that on a net basis decreased diluted earnings per share by $0.96 as follows:

•pre-tax amortization expense of $90 million recorded in amortization of intangible assets, or $0.59 per diluted share;

•pre-tax net charges of $45 million ($19 million recorded in cost of services and $28 million recorded in selling, general and administrative expenses, partially offset by a $2 million gain recorded in other operating expense, net), or $0.31 per diluted share, primarily associated with workforce reductions and integration costs incurred in connection with further restructuring and integrating our business;

•pre-tax charges of $12 million ($2 million recorded in selling, general and administrative expenses and $10 million recorded in other operating expense, net), or $0.10 per diluted share, primarily representing a loss associated with the increase in the fair value of the contingent consideration accrual associated with previous acquisitions; and

•pre-tax charges of $11 million recorded in equity in earnings of equity method investees, net of taxes, or $0.07 per diluted share, representing net losses associated with changes in the carrying value of our strategic investments; partially offset by

•$6 million of excess tax benefits associated with stock-based compensation arrangements, recorded in income tax expense, or $0.05 per diluted share.

Net Revenues

Net revenues for the three months ended September 30, 2025 increased by 13.1% compared to the prior year period. For the three months ended September 30, 2025, organic growth was 6.8% compared to the prior year period. 27

DIS revenues for the three months ended September 30, 2025 increased by 13.5% compared to the prior year period. For the three months ended September 30, 2025:

•The increase in DIS revenues compared to the prior year period was driven by both organic growth and the impact of recent acquisitions. For the three months ended September 30, 2025, recent acquisitions contributed approximately 6.5% to DIS revenues.

•DIS volume increased by 12.5% compared to the prior year period driven by the impact of recent acquisitions, which contributed approximately 8.6% to DIS volume, with organic volume up 3.9%.

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~~•Total~~ Net ~~revenue~~revenues ~~per~~for ~~requisition was up 0.8% versus~~ the ~~prior~~three ~~year~~months ~~period~~ended asMarch 31, an2026 ~~increase~~increased ~~in organic revenue per requisition was substantially offset~~ by ~~the impact of the LifeLabs acquisition (which carries a lower revenue per requisition)~~9. ~~On an organic basis, revenue per requisition was up 3.0~~2% incompared ~~the~~to ~~quarter versus~~ the prior year period principally driven ~~primarily~~ by anorganic ~~increase~~revenue ingrowth ~~the number~~ of ~~tests per requisition and test mix~~9. 0%.

DSDIS revenues for the three months ended ~~September~~March 3031, ~~2025~~2026 ~~decreased~~increased by 19.04% compared to the prior year period ~~principally due to lower revenues associated with our risk assessment services offered to insurers~~.

~~Net~~For ~~revenues for~~ the ~~nine~~three months ended ~~September~~March 3031, ~~2025 increased by 13.5% compared to the prior year period. For the nine months ended September 30, 2025, organic growth was 4.8% compared to the prior year period.~~ 2026:

~~DIS~~•The ~~revenues~~increase ~~for~~in ~~the~~DIS ~~nine~~revenues ~~months ended September 30, 2025 increased by 14.0%~~ compared to the prior year period~~. For~~ ~~the~~was ~~nine~~principally ~~months~~driven ~~ended~~by ~~September 30,~~the ~~2025:~~organic growth of 9.2%.

•~~The~~DIS ~~increase~~volume inincreased ~~DIS~~by ~~revenues~~10.9% compared to the prior year period ~~was~~principally driven ~~primarily~~ by ~~the~~organic ~~impact~~growth of ~~recent~~10.8%, ~~acquisitions~~of ~~and,~~which approximately 7% was due to aboth ~~lesser~~our ~~extent,~~new ~~organic~~relationship ~~growth~~with Corewell Health to provide Collaborative Lab Solutions and increasing our laboratory testing at dialysis clinics owned by Fresenius Medical Care in the United States. ~~For~~Excluding the ~~nine~~Corewell ~~months~~Health ~~ended~~and ~~September 30,~~Fresenius ~~2025,~~Medical ~~recent~~Care ~~acquisitions~~related ~~contributed~~testing, ~~approximately~~organic 8volume increased 3.98% compared to ~~DIS~~the ~~revenues~~prior year period.

•~~DIS~~Revenue ~~volume~~per ~~increased~~requisition decreased by 131.83% compared to the prior year period primarily driven by the ~~impact~~business ofmix ~~recent~~associated ~~acquisitions~~with our new relationships with Corewell Health and Fresenius Medical Care, which ~~contributed~~include ~~approximately~~a 12greater proportion of routine tests than most of our clinical testing.0% Excluding tothe ~~DIS~~Corewell ~~volume~~Health and Fresenius Medical Care business mix impacts, ~~with~~revenue ~~organic~~per ~~volume~~requisition upincreased by 1approximately 2.85% primarily driven by an increase in the number of tests per requisition and favorable test mix.

~~•Revenue~~ DS ~~per~~revenues ~~requisition~~for ~~was flat compared to~~ the ~~prior~~three ~~year~~months ~~period. An~~ended ~~increase~~March 31, in2026 ~~the~~were ~~number~~principally ofconsistent ~~tests~~with ~~per requisition and test mix was offset by~~ the ~~impact~~prior ofyear ~~LifeLabs, which has a lower revenue per requisition. On an organic basis, revenue per requisition increased 3.3% during the~~ period.

DS revenues for the nine months ended September 30, 2025 decreased by 4.0% compared to the prior year period principally due to lower revenues associated with our risk assessment services offered to insurers.

Cost of Services

Cost of services consists principally of costs for obtaining, transporting and testing specimens as well as facility costs used for the delivery of our services.

For the three months ended ~~September~~March 3031, ~~2025~~2026, cost of services increased by $~~190~~164 million compared to the prior year period. The increase was primarily driven by ~~the impact of recent acquisitions, wage increases and~~ higher ~~employee~~compensation ~~health care~~ costs and, to a lesser extent, higher supplies expense, partially offset by cost savings and productivity improvements from our Invigorate program.

For the nine months ended September 30, 2025, cost of services increased by $609 million compared to the prior year period. The increase was primarily driven by the impact of recent acquisitions, wage increases, and, to a lesser extent, higher supplies expense, partially offset by cost savings and productivity improvements from our Invigorate program.

Selling, General and Administrative Expenses ("SG&A")

SG&A consist principally of the costs associated with our sales and marketing efforts, billing operations, credit loss expense and general management and administrative support as well as administrative facility costs.

For the three months ended ~~September~~March 3031, ~~2025~~2026, SG&A increased by $5328 million compared to the prior period. The increase was primarily driven by ~~the impact of recent acquisitions, and, to a lesser extent,~~ higher compensation costs.

~~For~~The changes in the ~~nine~~value ~~months~~of ~~ended~~our ~~September 30,~~deferred ~~2025,~~compensation ~~SG&A~~obligations ~~increased~~is largely offset by ~~$159~~changes ~~million~~in ~~compared~~the tovalue of the ~~prior~~associated ~~period.~~investments, ~~The~~which ~~increase~~are ~~was~~recorded ~~primarily~~in ~~driven~~other byexpense, ~~the~~net. For ~~impact~~further ofdetails ~~recent~~regarding ~~acquisitions,~~our ~~and~~deferred compensation plans, see Note 17 to athe ~~lesser~~audited ~~extent,~~consolidated ~~higher~~financial ~~compensation~~statements ~~costs~~included ~~and~~in ~~higher~~our ~~depreciation~~2025 ~~expense~~Annual Report on Form 10-K.

The changes in the value of our deferred compensation obligations is largely offset by changes in the value of the associated investments, which are recorded in other income, net. For further details regarding our deferred compensation plans, see Note 17 to the audited consolidated financial statements included in our 2024 Annual Report on Form 10-K.

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Amortization Expense

For the three ~~and nine~~ months ended ~~September~~March 3031, ~~2025~~2026, amortization expense ~~increased~~was byprincipally $7consistent ~~million~~with ~~and $27 million, respectively, compared to~~ the prior year ~~periods as a result of recent acquisitions~~period.

Other Operating Expense, Net

Other operating expense, net includes miscellaneous income and expense items and other charges related to operating activities.

For both the three months ended ~~September~~March 3031, 2026 and 2025, other operating expense, net isprimarily ~~comprised~~represents ~~of a $15 million charge to earnings related to legal matters, an impairment charge of $5 million on certain long-lived assets related to the exit of a business and $2 million of~~ losses associated with the increase in the fair value of the contingent consideration accrual associated with previous acquisitions.

For the nine months ended September 30, 2025, other operating expense, net includes a $46 million gain from a payroll tax credit under the CARES Act associated with the retention of employees. Additionally, during the nine months ended September 30, 2025, we also recorded an impairment charge of $29 million on certain long-lived assets related to the exit of a business, a $15 million charge to earnings related to legal matters and $8 million of losses associated with the increase in the fair value of the contingent consideration accrual associated with previous acquisitions.

For both the three and nine months ended September 30, 2024, other operating expense, net primarily represents losses associated with the increase in the fair value of the contingent consideration accrual associated with previous acquisitions.

Interest Expense, Net

For the three and nine months ended September 30, 2025, interest expense, net increased by $17 million and $64 million, respectively, compared to the prior year periods primarily due to the issuance during August 2024 of $1.85 billion of senior notes.28

Other Income, Net

Other income, net represents miscellaneous income and expense items related to non-operating activities, such as gains and losses associated with investments and other non-operating assets.

For the three and nine months ended September 30, 2025, other income, net included $7 million and $16 million, respectively, of gains associated with investments in our deferred compensation plans.

For the three and nine months ended September 30, 2024, other income, net included $6 million and $18 million, respectively, of gains associated with investments in our deferred compensation plans. Additionally, both periods included an $8 million gain associated with a foreign exchange forward contract utilized in conjunction with an acquisition.

Income Tax Expense

Income tax expense for the three months ended September 30, 2025 and 2024 was $77 million and $65 million, respectively.

The effective income tax rate for the three months ended September 30, 2025 and 2024 was 23.6% and 21.9%, respectively. The effective income tax rates benefited from $3 million of excess tax benefits associated with stock-based compensation arrangements for each of the three months ended September 30, 2025 and 2024.

Income tax expense for the nine months ended September 30, 2025 and 2024 was $233 million and $205 million, respectively.

The effective income tax rate for the nine months ended September 30, 2025 and 2024 was 23.6% and 23.4%, respectively. The effective income tax rate benefited from $15 million and $6 million of excess tax benefits associated with stock-based compensation arrangements for the nine months ended September 30, 2025 and 2024, respectively.

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For the three months ended March 31, 2026, interest expense, net decreased by $4 million compared to the prior year period primarily due to the repayment in full of the outstanding indebtedness under our $600 million of 3.50% senior notes, which matured on March 30, 2025.

Other Expense, Net

Other expense, net represents miscellaneous income and expense items related to non-operating activities, such as gains and losses associated with investments and other non-operating assets.

For both the three months ended March 31, 2026 and 2025, other expense, net included $2 million of losses associated with investments in our deferred compensation plans.

Income Tax Expense

Income tax expense for the three months ended March 31, 2026 and 2025 was $74 million and $59 million, respectively.

The effective income tax rate for the three months ended March 31, 2026 and 2025 was 22.2% and 21.5%, respectively. The effective income tax rate benefited from $12 million and $9 million of excess tax benefits associated with stock-based compensation arrangements for the three months ended March 31, 2026 and 2025, respectively.

Equity in Earnings of Equity Method Investees, Net of Taxes

Equity in earnings of equity method investees, net of taxes, ~~increased~~decreased by $214 million for the three months ended ~~September~~March 3031, ~~2025~~2026, compared to the prior year period, primarily due to the three months ended March 31, 2025 including an $8 million non-recurring gain related to a lease and the three months ended March 31, 2026 including $7 million of losses associated with changes in the carrying value of our strategic investments.

Equity in earnings of equity method investees, net of taxes, increased by $21 million for the nine months ended September 30, 2025, compared to the prior year period, primarily due to the nine months ended September 30, 2024 including $11 million of net losses associated with changes in the carrying value of our strategic investments and the nine months ended September 30, 2025 including an $8 million non-recurring gain related to a lease.29

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Quantitative and Qualitative Disclosures About Market Risk

We address our exposure to market risks, principally the risk of changes in interest rates, through a controlled program of risk management that includes the use of derivative financial instruments. We do not hold or issue derivative financial instruments for speculative purposes. We seek to mitigate the variability in cash outflows that result from changes in interest rates by maintaining a balanced mix of fixed-rate and variable-rate debt obligations. In order to achieve this objective, we have historically entered into interest rate swap agreements. Interest rate swap agreements involve the periodic exchange of payments without the exchange of underlying principal or notional amounts. Net settlements are recognized as an adjustment to interest expense, net. We believe that our exposures to foreign exchange impacts and changes in commodity prices are not material to our consolidated results of operations, financial position or cash flows.

As of ~~September~~March 3031, ~~2025~~2026 and December 31, ~~2024~~2025, the fair value of our debt was estimated at approximately $5.76 billion and $65.17 billion, respectively, principally using quoted prices in active markets and yields for the same or similar types of borrowings, taking into account the underlying terms of the debt instruments. As of ~~September~~March 3031, ~~2025~~2026 and December 31, ~~2024~~2025, the estimated fair value was more than (less than) the carrying value of the debt by $56(15) million and $~~(112)~~59 million, respectively. A hypothetical 10% increase in interest rates (representing 4548 basis points and 3544 basis points as of ~~September~~March 3031, ~~2025~~2026 and December 31, ~~2024~~2025, respectively) would potentially reduce the estimated fair value of our debt by approximately $~~141~~136 million and $~~184~~135 million, ~~respectively,~~ as of ~~September~~March 3031, ~~2025~~2026 and December 31, ~~2024~~2025, respectively.

Borrowings under our secured receivables credit facility and our senior unsecured revolving credit facility are subject to variable interest rates. Interest on our secured receivables credit facility is based on either commercial paper rates for highly-rated issuers or the adjusted Term Secured Overnight Financing Rate ("Term SOFR"), plus a spread. Interest on our senior unsecured revolving credit facility is based on certain published rates plus an applicable margin based on changes in our public debt ratings. As such, our borrowing cost under this credit arrangement is subject to fluctuations in interest rates and changes in our public debt ratings. As of ~~September~~March 3031, ~~2025~~2026, the borrowing rates under these debt instruments were: for our secured receivables credit facility, commercial paper rates for highly-rated issuers or the adjusted Term SOFR, plus a spread of 0.80%; and for our senior unsecured revolving credit facility, the adjusted Term SOFR, plus 1.00%. As of ~~September~~March 3031, ~~2025~~2026, there were no borrowings outstanding under ~~either~~both the secured receivables credit facility orand the senior unsecured revolving credit facility.

The notional amount of fixed-to-variable interest rate swaps outstanding as of ~~September~~both March 3031, ~~2025~~2026 and December 31, ~~2024~~2025 was $1.8 ~~billion~~ ~~and $700 million, respectively~~billion. The aggregate net fair value of the fixed-to-variable interest rate swaps was $18 1 million and $~~(34)~~ 14 million, in ana net asset (liability) position, as of ~~September~~March 3031, ~~2025~~2026 and December 31, ~~2024~~2025, respectively.

Based on our net exposure to interest rate changes, a hypothetical 10% change to the variable rate component of our variable-rate indebtedness would not materially change our annual interest expense. A hypothetical 10% change in the SOFR curve (representing a 3638 basis points change in the weighted average yield) would potentially change the fair value of our fixed- to-variable interest rate swaps by $4644 million.

For further details regarding our outstanding debt, see Note ~~7 to the interim unaudited consolidated financial statements and Note~~ 13 to the audited consolidated financial statements included in our ~~2024~~2025 Annual Report on Form 10-K. For details regarding our financial instruments and hedging activities, see Note 87 to the interim unaudited consolidated financial statements and Note 15 to the audited consolidated financial statements included in our ~~2024~~2025 Annual Report on Form 10-K.

Risk Associated with Investment Portfolio

Our investment portfolio primarily includes equity investments comprised mostly of strategic holdings in companies concentrated in the life sciences and healthcare industries. Equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) with readily determinable fair values are measured at fair value in our consolidated balance sheet with changes in fair value recorded in current earnings in our consolidated statement of operations. Equity investments that do not have readily determinable fair values (which consist of investments in preferred and common shares of private companies) are measured at cost minus impairment, if any, plus or minus changes resulting from observable price changes.

We regularly evaluate equity investments that do not have readily determinable fair values to determine if there are any indicators that the investments are impaired. The carrying value of our equity investments that do not have readily determinable fair values was $3647 million as of ~~September~~March 3031, ~~2025~~2026. In conjunction with the preparation of our ~~September~~March 3031, ~~2025~~2026 financial statements, we considered whether the carrying values of our investments were impaired and concluded that no such impairment existed.

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We do not hedge our equity price risk. The impact of an adverse movement in equity prices on our holdings in privately held companies cannot be easily quantified as our ability to realize returns on investments depends on, among other things, the enterprises’ ability to raise additional capital or derive cash inflows from continuing operations or through liquidity events such as initial public offerings, mergers or private sales.

Liquidity and Capital Resources

	Nine Months Ended September 30,
	Three Months Ended March 31,
	2025		2024		Change
	2026		2025		Change
	(dollars in millions)
Net cash provided by operating activities	$	~~1,421~~278	$	~~870~~314	$	~~551~~(36)
Net cash used in investing activities	(~~440~~152)		(~~2,046~~115)		~~1,606~~(37)
Net cash (used in) provided by financing activities	(1,101)		1,254		(2,355)
Net cash used in financing activities	(152)		(561)		409
Effect of exchange rate changes on cash and cash equivalents and restricted cash	3(1)		—1		3(2)
Net change in cash and cash equivalents and restricted cash	$	(~~117~~27)	$	78(361)	$	~~(195)~~334

Cash and Cash Equivalents

Cash and cash equivalents consist of cash and highly-liquid short-term investments with original maturities, at the time of acquisition, of three months or less. Cash and cash equivalents as of ~~September~~March 3031, ~~2025~~2026 totaled $~~432~~393 million, compared to $~~549~~420 million as of December 31, ~~2024~~2025.

As of ~~September~~March 3031, ~~2025~~2026, approximately 1721% of our $~~432~~393 million of consolidated cash and cash equivalents were held outside of the United States.

Cash Flows from Operating Activities

Net cash provided by operating activities for the ~~nine~~three months ended ~~September~~March 3031, ~~2025~~2026 and ~~2024~~2025 was $~~1.4~~278 ~~billion~~million and $~~870~~314 million, respectively. The $~~551~~36 million ~~increase~~decrease in net cash provided by operating activities for the ~~nine~~three months ended ~~September~~March 3031, ~~2025~~2026, compared to the prior year period, was primarily a result of ~~increased operating income,~~ the timing of ~~non-income~~operating ~~tax~~receipts ~~payments,~~and ~~decreased~~disbursements ~~income~~and ~~tax~~higher bonus payments ~~due~~in to the ~~OBBBA~~current ~~(see~~period ~~above~~versus ~~for~~a ~~further~~year ~~discussion)~~ago, ~~and~~partially ~~the~~offset ~~payroll~~by ~~tax~~increased ~~credit~~operating ~~under the CARES Act~~income.

Days sales outstanding, a measure of billing and collection efficiency, was 4748 days as of ~~September~~March 3031, ~~2025~~2026, 48 days as of December 31, ~~2024~~2025 and 4947 days as of ~~September~~March 3031, ~~2024~~2025.

Cash Flows from Investing Activities

Net cash used in investing activities for the ~~nine~~three months ended ~~September~~March 3031, ~~2025~~2026 and ~~2024~~2025 was $~~440~~152 million and $~~2.0~~115 ~~billion~~million, respectively. This $~~1.6~~37 ~~billion~~million ~~decrease~~increase in net cash used in investing activities for the ~~nine~~three months ended ~~September~~March 3031, ~~2025~~2026, compared to the prior year period, was primarily a result of ~~decreased~~increased cash used for business acquisitions~~, partially offset by higher capital expenditures~~.

Cash Flows from Financing Activities

Net cash (used in) ~~provided by~~ financing activities for the ~~nine~~three months ended ~~September~~March 3031, ~~2025~~2026 and ~~2024~~2025 was $~~(1.1)~~152 ~~billion~~million and $~~1.3~~561 ~~billion~~million, respectively. ~~The~~This ~~nine~~$409 ~~months~~million ~~ended~~decrease ~~September~~in ~~30,~~net ~~2025~~cash ~~included~~used ~~the repayment~~ in ~~full~~financing ofactivities for the ~~outstanding~~three ~~indebtedness~~months ~~under~~ended ~~our $600~~March ~~million~~31, of2026, ~~3.50%~~compared ~~senior~~to ~~notes~~the atprior ~~maturity~~year ~~and~~period, ~~$150~~was ~~million~~primarily ofa ~~share~~result ~~repurchases~~ of ~~our~~the ~~common~~prior ~~stock.~~year ~~The~~period ~~nine~~including ~~months~~the ~~ended~~repayment ~~September~~in ~~30,~~full ~~2024~~of ~~included~~the ~~both~~outstanding ~~the~~indebtedness ~~issuance~~under ofour $~~1.85~~600 ~~billion~~million of ~~Senior~~3.50% ~~Notes~~senior ~~during~~notes ~~August~~(which ~~2024~~matured ~~and~~on ~~the~~March ~~repayment~~30, in2025) ~~full~~using ofa ~~the~~combination ~~outstanding~~of ~~indebtedness~~cash ~~under~~on ~~our~~hand ~~$300~~and $215 million of ~~4.25%~~borrowings ~~senior~~under ~~notes~~our atsecured ~~maturity~~receivables credit facility.

During the ~~nine~~three months ended ~~September~~March 3031, ~~2025~~2026, wethere ~~borrowed~~were ~~$410~~no ~~million~~borrowings or repayments under our secured receivables credit facility~~, which was repaid prior to September 30, 2025~~. During the ~~nine~~three months ended ~~September~~March 3031, ~~2025~~2026, there were no borrowings or repayments under our senior unsecured revolving credit facility. During the ~~nine~~three months ended ~~September~~March 3031, ~~2024~~2025, ~~there~~we ~~were~~borrowed no$215 million ~~borrowings or repayments~~ under our secured receivables credit facility, ~~and~~none of which was repaid prior to March 31, 2025. During the three months ended March 31, 2025, there were no borrowings or repayments under our senior unsecured revolving credit facility.

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Dividend Program

During the first three quarters of 2025, our Board of Directors declared a quarterly cash dividend of $0.80 per common share. During each of the four quarters of 2024, our Board of Directors declared a quarterly cash dividend of $0.75 per common share. 31

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During the first quarter of 2026, our Board of Directors declared a quarterly cash dividend of $0.86 per common share. During each of the four quarters of 2025, our Board of Directors declared a quarterly cash dividend of $0.80 per common share.

Share Repurchase Program

In February 2026, our Board of Directors authorized us to repurchase an additional $1 billion of our common stock. As of ~~September~~March 3031, ~~2025~~2026, $01.74 billion remained available under our share repurchase authorization. The share repurchase authorization has no set expiration or termination date.

Share Repurchases

For both the ~~nine~~three months ended ~~September~~March 31, 2026 and March 3031, 2025, we repurchased ~~0.9~~no ~~million~~ shares of our common stock ~~for $150 million~~.

For the nine months ended September 30, 2024, we repurchased no shares of our common stock.

Contractual Obligations

A description of the terms of our indebtedness and related debt service requirements is contained in Note 13 to the audited consolidated financial statements included in our ~~2024~~2025 Annual Report on Form 10-K.

A discussion of our lease obligations is contained in Note 14 to the audited consolidated financial statements included in our ~~2024~~2025 Annual Report on Form 10-K.

A discussion of our noncancellable commitments to purchase products or services is contained in Note 18 to the audited consolidated financial statements included in our ~~2024~~2025 Annual Report on Form 10-K.

Equity Method Investees

Our equity method investees primarily consist of a diagnostic information services joint venture and an investment in a fund that purchases strategic holdings in private companies in the healthcare industry. Such investees are accounted for under the equity method of accounting. Our investment in equity method investees is less than 5% of our consolidated total assets. Our proportionate share of income before income taxes associated with our equity method investees is less than 5% of our consolidated income before income taxes and equity in earnings of equity method investees. We have no material unconditional obligations or guarantees to, or in support of, our equity method investees and their operations.

In conjunction with the preparation of our ~~September~~March 3031, ~~2025~~2026 financial statements, we considered whether the carrying values of our equity method investments were impaired and concluded that no such impairment existed.

Requirements and Capital Resources

We estimate that we will invest approximately $~~500~~550 million during ~~2025~~2026 for capital expenditures, to support and grow our existing operations, principally related to investments in laboratory equipment and facilities, including laboratory automations and information technology to support our diagnostic offerings.

InWe ~~February~~have ~~2025,~~$500 wemillion committed to a multi-year project ("Project Nova") to modernize our "Order-to-Cash" business processes including related information technology infrastructure and underlying enabling technologies. As part of ~~the project, we are partnering with a third-party, Epic, via a license agreement~~3. We45% ~~expect~~senior tonotes ~~deliver~~due ~~value~~June ~~throughout the implementation of Project Nova~~1, ~~as it unlocks a variety of streamlined operational benefits, reduced technology-related operating costs, accelerated revenue opportunities and improvements to the customer and patient experience~~2026. ~~See our 2024 Annual Report on Form 10-K for further details.~~

39 In February 2025, we committed to a multi-year project ("Project Nova") to modernize our "Order-to-Cash" business processes including related information technology infrastructure and underlying enabling technologies. We expect to deliver value throughout the implementation of Project Nova, as it unlocks a variety of streamlined operational benefits, reduced technology-related operating costs, accelerated revenue opportunities and improvements to the customer and patient experience. See our 2025 Annual Report on Form 10-K for further details.

As of March 31, 2026, we had $1.3 billion of borrowing capacity available under our existing credit facilities, including $518 million available under our secured receivables credit facility and $750 million available under our senior unsecured revolving credit facility. There were no borrowings outstanding under the secured receivables credit facility and no borrowings outstanding under the senior unsecured revolving credit facility as of March 31, 2026. In support of our risk management program, $82 million in letters of credit under the secured receivables credit facility were outstanding as of March 31, 2026.

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WeOur ~~have~~secured ~~$500 million~~receivables ofcredit 3facility is subject to customary affirmative and negative covenants, and certain financial covenants with respect to the receivables that comprise the borrowing base and secure the borrowings under the facility.~~45%~~ Our senior ~~notes~~unsecured ~~due~~revolving ~~June~~credit ~~2026~~facility is also subject to certain financial covenants and limitations on indebtedness. As of March 31, 2026, we were in compliance with all such applicable financial covenants.

As of September 30, 2025, we had $1.3 billion of borrowing capacity available under our existing credit facilities, including $522 million available under our secured receivables credit facility and $750 million available under our senior unsecured revolving credit facility. There were no borrowings outstanding under either the secured receivables credit facility or the senior unsecured revolving credit facility as of September 30, 2025. In support of our risk management program, $78 million in letters of credit under the secured receivables credit facility were outstanding as of September 30, 2025.

Our secured receivables credit facility is subject to customary affirmative and negative covenants, and certain financial covenants with respect to the receivables that comprise the borrowing base and secure the borrowings under the facility. Our senior unsecured revolving credit facility is also subject to certain financial covenants and limitations on indebtedness. As of September 30, 2025, we were in compliance with all such applicable financial covenants.

We believe that our cash and cash equivalents and cash from operations, together with our borrowing capacity under our credit facilities, will provide sufficient financial flexibility to fund seasonal and other working capital requirements, capital expenditures, debt service requirements and other obligations, cash dividends on common shares, share repurchases and additional growth opportunities, including acquisitions, for the foreseeable future. However, should it become necessary, we believe that our credit profile should provide us with access to additional financing in order to fund normal business operations, make interest payments, fund additional growth opportunities, including acquisitions, and satisfy upcoming debt maturities.

Forward-Looking Statements

Some statements and disclosures in this document are forward-looking statements. Forward-looking statements include all statements that do not relate solely to historical or current facts and can be identified by the use of words such as “may,” “believe,” “will,” “expect,” “project,” “estimate,” “anticipate,” “plan”, "aim", or “continue.” These forward-looking statements are based on our current plans and expectations and are subject to a number of risks and uncertainties that could cause our plans and expectations, including actual results, to differ materially from the forward-looking statements. Risks and uncertainties that may affect our future results include, but are not limited to, uncertain and volatile economic conditions, adverse results from pending or future government investigations, lawsuits or private actions, the competitive environment, the complexity of billing, reimbursement and revenue recognition for clinical laboratory testing, changes in government policies, including related to trade, and regulations, changing relationships with customers, payers, suppliers and strategic partners, acquisitions and other factors discussed in our most recently filed Annual Report on Form 10-K and subsequently filed Quarterly Reports on Form 10-Q and Current Reports on Form 8-K, including those discussed in the “Business,” “Risk Factors,” “Cautionary Factors that May Affect Future Results” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” sections of those reports.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

See Item 2. "Management's Discussion and Analysis of Financial Condition and Results of Operations."

Item 4. Controls and Procedures

Management, including our Chief Executive Officer and our Chief Financial Officer, has evaluated the effectiveness of our disclosure controls and procedures (as defined under Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934, as amended). Based upon that evaluation, our Chief Executive Officer and our Chief Financial Officer concluded that our disclosure controls and procedures were effective as of the end of the period covered by this quarterly report.

During the ~~third~~first quarter of ~~2025~~2026, there were no changes in our internal control over financial reporting (as defined in Rule 13a-15(f) under the Securities Exchange Act of 1934, as amended) that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II - OTHER INFORMATION

Item 1. Legal Proceedings

See Note 1110 to the interim unaudited consolidated financial statements for information regarding the status of legal proceedings involving the Company.

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Item 1A. Risk Factors

Item 1A. of our Annual Report on Form 10-K for the year ended December 31, ~~2024~~2025 includes a discussion of our risk factors. There have been no material changes in the risk factors described in that report.

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Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

The table below sets forth the information with respect to purchases made by or on behalf of the Company of its common stock during the ~~third~~first quarter of ~~2025~~2026.

ISSUER PURCHASES OF EQUITY SECURITIES

Period

Total Number ofSharesPurchased

Average PricePaid per Share

Total Number ofShares Purchasedas Part of PubliclyAnnounced Plansor Programs

ApproximateDollar Value ofShares that MayYet Be PurchasedUnder the Plansor Programs (in thousands)

July 1, 2025 – July 31, 2025

January 1, 2026 – January 31, 2026

Share Repurchase Program (A)

~~220,867~~—

~~169.78~~—

~~220,867~~—

~~848~~433,~~415~~481

Employee Transactions (B)

~~862~~119

~~169~~175.0670

N/A

August 1, 2025 - August 31, 2025

February 1, 2026 - February 28, 2026

Share Repurchase Program (A)

~~588,957~~—

~~178.16~~—

~~588,957~~—

~~743~~1,~~485~~433,481

Employee Transactions (B)

461,~~824~~028

~~176~~208.8834

N/A

September 1, 2025 – September 30, 2025

March 1, 2026 – March 31, 2026

Share Repurchase Program (A)

~~42,070~~—

~~179.82~~—

~~42,070~~—

~~735~~1,~~920~~433,481

Employee Transactions (B)

~~162~~119,493

~~184~~204.1386

N/A

Total

Share Repurchase Program (A)

~~851,894~~—

~~176.07~~—

~~851,894~~—

~~735~~1,~~920~~433,481

Employee Transactions (B)

5180,~~848~~640

~~175~~206.9302

N/A

(A)In February 2026, our Board of Directors increased the size of our share repurchase program by $1 billion. Since the share repurchase program’s inception in May 2003, our Board of Directors has authorized $1314 billion of share repurchases of our common stock through ~~September~~March 3031, ~~2025~~2026. The share repurchase authorization has no set expiration or termination date.

(B)Includes: (1) shares delivered or attested to in satisfaction of the exercise price and/or tax withholding obligations by holders of stock options (granted under the Company’s Amended and Restated Employee Long-Term Incentive Plan) who exercised options; and (2) shares withheld (under the terms of grants under the Amended and Restated Employee Long-Term Incentive Plan) to offset tax withholding obligations that occur upon the delivery of outstanding common shares underlying restricted stock units and performance share units.

Item 5. Other Information

a.None

b.None

c.Rule 10b5-1 and Non-Rule 10b5-1 Trading Arrangements by Our Directors and Officers

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During the quarterly period covered by this report, our directors and officers (as defined in Rule 16a-1(f) of the Securities Exchange Act of 1934, as amended) adopted, terminated or modified the Rule 10b5-1 trading arrangements (as defined in Item 408 of Regulation S-K) set forth in the table below. No non-Rule 10b5-1 trading arrangements were adopted, modified or terminated by any director or officer during the quarterly period covered by this report.

Name

Title

Type of Trading Arrangement

Security

Action

Date of Action

Duration of Trading Arrangement

Aggregate Number of Securities Covered

Jim Davis

Chairman, CEO, and President

Rule 10b5-1 plan to sell

Common Stock

Adoption

August 26, 2025

August 26, 2025 to December 4, 2026*

Up to 95,093*

Karthik Kuppusamy

SVP, Clinical Solutions

Rule 10b5-1 plan to sell

Common Stock

Adoption

February 26, 2026

February 26, 2026 to February 26, 2027*

Up to 8,147*

Mark Delaney

SVP and Chief Commercial Officer

Rule 10b5-1 plan to sell

Common Stock

Adoption

August 18, 2025

August 18, 2025 to May 11, 2026*

Up to 7,946*

* Includes shares of common stock to be released from: ~~(a)~~ stock options ~~and/or restricted stock units that are expected to vest and/or (b) performance share awards that may vest, subject to the satisfaction of the applicable performance metrics~~. The actual number of shares of common stock that will be released is not yet determinable and the actual number of shares of common stock that will be sold will be net of the number of shares withheld to satisfy employee tax withholding obligations.

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Item 6.Exhibits

Exhibits:

10.1			Form of Quest Diagnostics Incorporated 2026 Equity Award Agreement
22			Subsidiary Guarantors of Securities
31.1			Rule 13a-14(a) Certification of Chief Executive Officer
31.2			Rule 13a-14(a) Certification of Chief Financial Officer
32.1			Section 1350 Certification of Chief Executive Officer
32.2			Section 1350 Certification of 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 Document - dgx-~~20250930~~20260331.xsd
101.CAL			Inline XBRL Taxonomy Extension Calculation Linkbase Document - dgx-~~20250930_cal~~20260331_cal.xml
101.DEF			Inline XBRL Taxonomy Extension Definition Linkbase Document - dgx-~~20250930_def~~20260331_def.xml
101.LAB			Inline XBRL Taxonomy Extension Label Linkbase Document - dgx-~~20250930_lab~~20260331_lab.xml
101.PRE			Inline XBRL Taxonomy Extension Presentation Linkbase Document - dgx-~~20250930_pre~~20260331_pre.xml
104			Cover Page Interactive Data File (formatted in Inline XBRL and contained in Exhibit 101)

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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.

~~October~~April 2122, ~~2025~~2026

Quest Diagnostics Incorporated


By			/s/ James E. Davis
			James E. Davis
			Chairman, Chief Executive Officer
			and President


By			/s/ Sam A. Samad
			Sam A. Samad
			Executive Vice President and
			Chief Financial Officer

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