*Prior periods exclude stock-based compensation related employer payroll taxes from non-GAAP measures due to immateriality.

RECONCILIATION OF GROSS MARGIN TO NON-GAAP GROSS MARGIN (Unaudited, in thousands)
		Three Months Ended June 30,								Six Months Ended June 30,
		2024				2023				2024				2023
Gross profit		$	280,578			$	247,675			$	533,019			$	506,455
Gross margin			55.3	%			56.1	%			55.2	%			56.8	%
Adjustments to reconcile gross profit to non-GAAP gross profit:
Stock-based compensation and related expenses*			1,635				1,150				3,535				2,297
Amortization of acquisition-related intangible assets			339				-				597				-
Deferred compensation plan expense			100				280				540				460
Non-GAAP gross profit		$	282,652			$	249,105			$	537,691			$	509,212
Non-GAAP gross margin			55.7	%			56.5	%			55.7	%			57.1	%

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