
	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2026		2025		2026		2025
Operating income	$	88,608	$	84,430	$	214,868	$	199,614
Amortization of purchased intangibles (see Note 6)	11,554		11,405		23,611		22,849
Deferred compensation plan	11,661		7,584		10,587		6,338
Acquisition expenses (1)	2,413		3,350		6,093		6,276
Integration costs (2)	1,800		—		1,800		—
Realignment expenses (income) (3)	—		—		—		—
AOI less Operating SBC	$	116,036	$	106,769	$	256,959	$	235,077

(1)Acquisition expenses. The Company incurs expenses for professional services rendered in connection with business combinations, which are recorded in general and administrative expenses in the Company’s GAAP consolidated statements of operations. Also included in the Company’s acquisition expenses are cash- and equity‑settled retention incentives provided to key employees of the acquired companies.

(2)Integration costs. Integration costs are incremental costs incurred to integrate and consolidate acquired businesses with the Company’s existing operations, including where it combines an acquired business with an existing business and consolidate overlapping teams, products, and systems. These costs consist primarily of employee severance and related personnel costs arising from such consolidation, and also include contract termination costs and costs to combine or migrate systems, platforms, and processes, and, to a lesser extent, charges to exit or consolidate facilities or other assets, in each case incurred as a direct result of an acquisition. The Company excludes these costs when evaluating its continuing operational performance because they result from acquisition activity rather than the ordinary course of business. Integration costs do not include costs of discrete realignment initiatives that are not undertaken in connection with an acquisition, which are reported as realignment expenses (income). Integration costs may recur to the extent the Company completes and integrates additional acquisitions.

(3)Realignment expenses (income). Realignment expenses (income) consist of the costs of discrete, significant realignment initiatives that the Company formally approves and that have a defined scope of actions and completion timeline—such as a broad reorganization or workforce-reduction program—including employee severance and related personnel costs and associated facility or asset costs. Such initiatives arise from time to time, and the related costs may recur in future periods. The Company excludes these amounts when evaluating its continuing operational performance because such initiatives are distinct from the ordinary course of business. The Company does not adjust for severance or organizational and workforce changes undertaken in the ordinary course of managing its business, which remain reflected in the measure.