During the third quarter of 2025, we completed our annual impairment test of goodwill, which was based on a qualitative assessment, and concluded that there was no impairment. A qualitative assessment is designed to determine whether we believe it is more likely than not that the fair values of our reporting units exceed their carrying values. A qualitative assessment includes a review of qualitative factors, including company-specific (financial performance and long-range plans), industry, and macroeconomic factors, and a consideration of the fair value of each reporting unit at the last valuation date.

Goodwill and acquired intangible assets consisted of the following:


(in thousands)	June 30, 2025						September 30, 2024
	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
Goodwill					$	3,497,012					$	3,461,891
Intangible assets with finite lives:
Purchased software	$	639,597	$	464,507	$	175,090	$	634,439	$	436,471	$	197,968
Capitalized software		22,877		22,877		—		22,877		22,877		—
Customer lists and relationships		1,150,597		495,329		655,268		1,141,086		457,718		683,368
Trademarks and trade names		38,233		23,772		14,461		37,961		21,821		16,140
Other		4,026		4,026		—		3,941		3,941		—
Total intangible assets with finite lives	$	1,855,330	$	1,010,511	$	844,819	$	1,840,304	$	942,828	$	897,476
Total goodwill and acquired intangible assets					$	4,341,831					$	4,359,367

The aggregate amortization expense for intangible assets with finite lives is classified in our Consolidated Statements of Operations as follows:


(in thousands)	Three months ended				Nine months ended
	June 30, 2025		June 30, 2024		June 30, 2025		June 30, 2024
Amortization of acquired intangible assets	$	11,536	$	10,672	$	34,356	$	31,459
Cost of revenue		8,178		9,685		24,609		28,835
Total amortization expense	$	19,714	$	20,357	$	58,965	$	60,294