During the third quarter of 2026, 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, 2026						September 30, 2025
	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
Goodwill					$	3,398,303					$	3,493,316
Intangible assets with finite lives:
Purchased software	$	547,640	$	401,974	$	145,666	$	639,104	$	472,357	$	166,747
Capitalized software		22,877		22,877		—		22,877		22,877		—
Customer lists and relationships		1,088,385		480,308		608,077		1,149,262		505,202		644,060
Trademarks and trade names		31,822		19,766		12,056		38,179		24,323		13,856
Other		3,469		3,469		—		4,019		4,019		—
Total intangible assets with finite lives	$	1,694,193	$	928,394	$	765,799	$	1,853,441	$	1,028,778	$	824,663
Total goodwill and acquired intangible assets					$	4,164,102					$	4,317,979

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, 2026		June 30, 2025		June 30, 2026		June 30, 2025
Amortization of acquired intangible assets	$	11,991	$	11,536	$	36,075	$	34,356
Cost of revenue		7,753		8,178		23,421		24,609
Total amortization expense	$	19,744	$	19,714	$	59,496	$	58,965