BUSINESS SEGMENT INFORMATION (Tables)

3 Months Ended

Mar. 31, 2026

Summary of Segment Reporting Information by Segment

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,

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 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

Depreciation and amortization expense for the three months ended March 31, 2026 and 2025 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