Goodwill and Other Intangible Assets (Tables)

The following table presents the economic life, acquisition date fair value, accumulated amortization and net carrying value for other intangible assets and goodwill as of March 31, 2025 and December 31, 2024:


$ in Millions	Weighted Average Economic Life (in years)	March 31, 2025						December 31, 2024
		Acquisition Date Fair Value		Accumulated Amortization		Net Carrying Value		Acquisition Date Fair Value		Accumulated Amortization		Net Carrying Value
Goodwill:
Ark	N/A	$	116.8	$	—	$	116.8	$	116.8	$	—	$	116.8
Kudu	N/A	7.6		—		7.6		7.6		—		7.6
Bamboo	N/A	270.4		—		270.4		270.4		—		270.4
Other Operations	N/A	44.4		—		44.4		44.4		—		44.4
Total goodwill		439.2		—		439.2		439.2		—		439.2
Other intangible assets:
Ark
Underwriting capacity	N/A	175.7		—		175.7		175.7		—		175.7








Kudu
Trade names	7.0	2.2		1.9		.3		2.2		1.8		.4
Bamboo
Trade names	10.0	23.5		2.9		20.6		23.5		2.3		21.2
Agency relationships	6.0	72.4		15.1		57.3		72.4		12.1		60.3
Developed technology	3.0	4.7		2.0		2.7		4.7		1.6		3.1
Other	0.3	.4		.4		—		.4		.4		—
Subtotal		101.0		20.4		80.6		101.0		16.4		84.6
Other Operations
Trade names	13.3	13.3		6.0		7.3		13.3		5.6		7.7
Customer relationships	11.0	24.8		14.3		10.5		24.8		13.6		11.2


Other	11.8	3.1		1.6		1.5		3.1		1.6		1.5
Subtotal		41.2		21.9		19.3		41.2		20.8		20.4
Total other intangible assets		320.1		44.2		275.9		320.1		39.0		281.1
Total goodwill and other intangible assets		$	759.3	$	44.2	$	715.1	$	759.3	$	39.0	$	720.3

The following table presents the change in goodwill and other intangible assets for the three months ended March 31, 2025 and 2024:


	Three Months Ended March 31,
	2025						2024
Millions	Goodwill		Other Intangible Assets		Total Goodwill and Other Intangible Assets		Goodwill		Other Intangible Assets		Total Goodwill and Other Intangible Assets
Beginning balance	$	439.2	$	281.1	$	720.3	$	168.8	$	201.8	$	370.6
Acquisitions of businesses (1)	—		—		—		270.4		101.0		371.4
Acquisitions of intangible assets (2)	—		—		—		—		.3		.3



Amortization	—		(5.2)		(5.2)		—		(5.7)		(5.7)


Ending balance	$	439.2	$	275.9	$	715.1	$	439.2	$	297.4	$	736.6

(1) Relates to the Bamboo Transaction. See Note 2 — “Significant Transactions.”

(2) Relates to acquisitions within Other Operations.