Goodwill and Acquired Intangible Assets

12 Months Ended

Sep. 30, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Acquired Intangible Assets

6. Goodwill and Acquired Intangible Assets

Goodwill and acquired intangible assets consisted of the following:

(in thousands)	September 30, 2025						September 30, 2024
	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Gross Carrying Amount		Accumulated Amortization		Net Book Value
Goodwill (not amortized)					$	3,493,316					$	3,461,891
Intangible assets with finite lives (amortized)(1):
Purchased software	$	639,104	$	472,357	$	166,747	$	634,439	$	436,471	$	197,968
Capitalized software		22,877		22,877		—		22,877		22,877		—
Customer lists and relationships		1,149,262		505,202		644,060		1,141,086		457,718		683,368
Trademarks and trade names		38,179		24,323		13,856		37,961		21,821		16,140
Other		4,019		4,019		—		3,941		3,941		—
	$	1,853,441	$	1,028,778	$	824,663	$	1,840,304	$	942,828	$	897,476
Total goodwill and acquired intangible assets					$	4,317,979					$	4,359,367

(1)The weighted-average useful lives of purchased software, customer lists and relationships, and trademarks and trade names with a remaining net book value are 11 years, 17 years, and 11 years, respectively. The weighted-average useful life for all intangible assets with remaining net book value is 16 years.

The changes in the carrying amounts of Goodwill from September 30, 2024 to September 30, 2025 are due to the impact of acquisitions and to foreign currency translation adjustments related to those asset balances that are recorded in non-U.S. currencies.

Changes in Goodwill were as follows:

(in thousands)
Balance, September 30, 2023	$	3,358,511
pure-systems acquisition		77,118
Foreign currency translation adjustments		26,262
Balance, September 30, 2024	$	3,461,891
Other acquisitions		5,977
Foreign currency translation adjustments		25,448
Balance, September 30, 2025	$	3,493,316

The aggregate amortization expense for intangible assets with finite lives recorded for the years ended September 30, 2025, 2024 and 2023 was reflected in our Consolidated Statements of Operations as follows:

(in thousands)	Year ended September 30,
	2025		2024		2023
Amortization of acquired intangible assets	$	45,948	$	42,018	$	40,022
Cost of revenue		32,828		38,495		35,694
Total amortization expense	$	78,776	$	80,513	$	75,716

The estimated aggregate future amortization expense for intangible assets with finite lives remaining as of September 30, 2025 is $79.6 million for 2026, $79.7 million for 2027, $76.9 million for 2028, $73.8 million for 2029, $66.2 million for 2030 and $448.5 million thereafter.