Goodwill was $1,692.7 million as of March 31, 2026 and December 31, 2025. There were no events or circumstances indicating that goodwill might be impaired as of March 31, 2026 and December 31, 2025.

Intangible assets, other than goodwill, consisted of the following as of March 31, 2026 and December 31, 2025, respectively:


(in millions)	Gross Carrying Amount		Accumulated Amortization		Net
Intangible assets subject to amortization:
Customer relationships	$	288.1	$	(158.3)	$	129.8
Acquired technology	331.3		(291.7)		39.6
Brand portfolio	11.5		(9.3)		2.2
Total intangible assets subject to amortization	$	630.9	$	(459.3)	$	171.6

Intangible assets not subject to amortization
Pre-Acquisition ZI brand portfolio	$	33.0	$	—	$	33.0
Total intangible assets not subject to amortization	$	33.0	$	—	$	33.0

Total intangible assets	$	663.9	$	(459.3)	$	204.6


(in millions)	Gross Carrying Amount		Accumulated Amortization		Net
Intangible assets subject to amortization:
Customer relationships	$	288.1	$	(153.4)	$	134.7
Acquired technology	331.3		(284.2)		47.1
Brand portfolio	11.5		(9.0)		2.5
Total intangible assets subject to amortization	$	630.9	$	(446.6)	$	184.3

Intangible assets not subject to amortization:
Pre-Acquisition ZI brand portfolio	$	33.0	$	—	$	33.0
Total intangible assets not subject to amortization	$	33.0	$	—	$	33.0

Total intangible assets	$	663.9	$	(446.6)	$	217.3

There were no events or circumstances indicating that indefinite-lived intangible assets might be impaired as of March 31, 2026 and December 31, 2025. Amortization expense was $12.6 million and $14.7 million for the three months ended March 31, 2026 and 2025, respectively.