Goodwill and Intangible Assets

6 Months Ended

Mar. 31, 2026

6. Goodwill and Intangible Assets

Goodwill and acquired intangible assets consisted of the following:


(in thousands)	March 31, 2026						September 30, 2025
	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
Goodwill					$	3,403,009					$	3,493,316
Intangible assets with finite lives:
Purchased software	$	545,687	$	394,974	$	150,713	$	639,104	$	472,357	$	166,747
Capitalized software		22,877		22,877		—		22,877		22,877		—
Customer lists and relationships		1,090,276		470,332		619,944		1,149,262		505,202		644,060
Trademarks and trade names		31,882		19,303		12,579		38,179		24,323		13,856
Other		3,486		3,486		—		4,019		4,019		—
Total intangible assets with finite lives	$	1,694,208	$	910,972	$	783,236	$	1,853,441	$	1,028,778	$	824,663
Total goodwill and acquired intangible assets					$	4,186,245					$	4,317,979

Changes in Goodwill were as follows:


(in thousands)
Balance, October 1, 2025	$	3,493,316
Divestiture of businesses		(82,204	)
Foreign currency translation adjustment		(8,103	)
Balance, March 31, 2026	$	3,403,009

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				Six months ended
	March 31, 2026		March 31, 2025		March 31, 2026		March 31, 2025
Amortization of acquired intangible assets	$	12,012	$	11,380	$	24,084	$	22,820
Cost of revenue		7,768		8,131		15,668		16,431
Total amortization expense	$	19,780	$	19,511	$	39,752	$	39,251