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CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues:
Earned insurance premiums	$ 220.1	$ 6.2	$ 455.4	$ 17.2
Net investment income	19.5	71.2	57.2	113.7
Net realized and unrealized investment (losses) gains	30.5	56.6	91.2	7.8
Commission revenues	69.4	60.3	201.6	180.3
Other revenues	47.2	15.2	114.9	45.9
Total revenues	(10.1)	459.5	594.8	659.9
Expenses:
Loss and loss adjustment expenses	129.2		247.8
Insurance and reinsurance acquisition expenses	56.7	1.6	130.9	5.4
Cost of sales	24.0	2.3	45.9	6.5
General and administrative expenses	100.8	103.4	357.9	267.0
Broker commission expenses	20.4	17.1	60.9	56.4
Change in fair value of contingent consideration	0.6	0.7	0.8	(1.6)
Amortization of other intangible assets	10.2	5.4	28.1	17.1
Loss on assets held for sale			28.7
Interest expense	10.3	7.8	32.5	21.2
Total expenses	352.2	138.3	933.5	372.0
Pre-tax (loss) income from continuing operations	(362.3)	321.2	(338.7)	287.9
Income tax expense	(21.6)	(98.5)	(41.9)	(97.1)
Net (loss) income from continuing operations	(383.9)	222.7	(380.6)	190.8
Net (loss) gain from sale of discontinued operations, net of tax	0.0	(0.7)	18.7	(0.8)
Net (loss) income	(383.9)	222.0	(361.9)	190.0
Net loss attributable to non-controlling interests	12.5	10.9	53.7	29.5
Net (loss) income attributable to White Mountains’s common shareholders	(371.4)	232.9	(308.2)	219.5
Marketing Technology (MediaAlpha)
Revenues:
Net realized and unrealized investment (losses) gains from investment in MediaAlpha	(396.8)	250.0	(325.5)	295.0
Financial Guarantee (HG Global/BAM)
Revenues:
Earned insurance premiums	6.7	6.2	19.6	17.2
Net investment income	4.4	4.7	13.2	15.1
Net realized and unrealized investment (losses) gains	(4.0)	3.2	(15.6)	23.7
Commission revenues	0.0	0.0	0.0	0.0
Other revenues	0.3	0.4	0.9	2.1
Total revenues	7.4	14.5	18.1	58.1
Expenses:
Loss and loss adjustment expenses	0.0		0.0
Insurance and reinsurance acquisition expenses	3.0	1.6	6.5	5.4
Cost of sales	0.0	0.0	0.0	0.0
General and administrative expenses	12.4	14.0	42.7	41.4
Broker commission expenses	0.0	0.0	0.0	0.0
Change in fair value of contingent consideration	0.0	0.0	0.0	0.0
Amortization of other intangible assets	0.0	0.0	0.0	0.0
Loss on assets held for sale			0.0
Interest expense	0.0	0.0	0.0	0.0
Total expenses	15.4	15.6	49.2	46.8
Pre-tax (loss) income from continuing operations	(8.0)	(1.1)	(31.1)	11.3
Financial Guarantee (HG Global/BAM) | Marketing Technology (MediaAlpha)
Revenues:
Net realized and unrealized investment (losses) gains from investment in MediaAlpha	0.0	0.0	0.0	0.0
P&C Insurance and Reinsurance (Ark)
Revenues:
Earned insurance premiums	213.4	0.0	435.8	0.0
Net investment income	0.6	0.0	1.8	0.0
Net realized and unrealized investment (losses) gains	0.3	0.0	10.3	0.0
Commission revenues	0.0		0.0
Other revenues	3.4	0.0	9.4	0.0
Total revenues	217.7	0.0	457.3	0.0
Expenses:
Loss and loss adjustment expenses	129.2	0.0	247.8	0.0
Insurance and reinsurance acquisition expenses	53.7	0.0	124.4	0.0
Cost of sales	0.0		0.0
General and administrative expenses	21.8	0.0	84.4	0.0
Broker commission expenses	0.0		0.0
Change in fair value of contingent consideration	0.0		0.0
Amortization of other intangible assets	0.0		0.0
Loss on assets held for sale			0.0
Interest expense	2.1	0.0	4.5	0.0
Total expenses	206.8	0.0	461.1	0.0
Pre-tax (loss) income from continuing operations	10.9		(3.8)
P&C Insurance and Reinsurance (Ark) | Marketing Technology (MediaAlpha)
Revenues:
Net realized and unrealized investment (losses) gains from investment in MediaAlpha	0.0		0.0
Specialty Insurance Distribution (NSM)
Revenues:
Earned insurance premiums	0.0	0.0	0.0	0.0
Net investment income	0.0	0.0	0.0	0.0
Net realized and unrealized investment (losses) gains	0.0	0.0	0.0	0.0
Commission revenues	67.0	58.2	194.6	174.2
Other revenues	15.3	12.5	46.8	37.6
Total revenues	82.3	70.7	241.4	211.8
Expenses:
Loss and loss adjustment expenses	0.0		0.0
Insurance and reinsurance acquisition expenses	0.0	0.0	0.0	0.0
Cost of sales	0.0	0.0	0.0	0.0
General and administrative expenses	48.8	42.9	142.1	131.0
Broker commission expenses	20.4	17.1	60.9	56.4
Change in fair value of contingent consideration	0.6	0.7	0.8	(1.6)
Amortization of other intangible assets	8.2	5.1	25.0	16.2
Loss on assets held for sale	0.0	0.0	28.7	0.0
Interest expense	5.9	6.1	17.7	16.1
Total expenses	83.9	71.9	275.2	218.1
Pre-tax (loss) income from continuing operations	(1.6)	(1.2)	(33.8)	(6.3)
Specialty Insurance Distribution (NSM) | Marketing Technology (MediaAlpha)
Revenues:
Net realized and unrealized investment (losses) gains from investment in MediaAlpha	0.0	0.0	0.0	0.0
Asset Management (Kudu)
Revenues:
Earned insurance premiums	0.0	0.0	0.0	0.0
Net investment income	9.5	6.4	26.1	19.3
Net realized and unrealized investment (losses) gains	18.9	9.8	62.5	1.5
Commission revenues	0.0	0.0	0.0	0.0
Other revenues	0.1	0.1	0.2	0.2
Total revenues	28.5	16.3	88.8	21.0
Expenses:
Loss and loss adjustment expenses	0.0		0.0
Insurance and reinsurance acquisition expenses	0.0	0.0	0.0	0.0
Cost of sales	0.0	0.0	0.0	0.0
General and administrative expenses	3.3	2.2	9.0	7.5
Broker commission expenses	0.0	0.0	0.0	0.0
Change in fair value of contingent consideration	0.0	0.0	0.0	0.0
Amortization of other intangible assets	0.0	0.1	0.2	0.3
Loss on assets held for sale			0.0
Interest expense	1.9	1.4	9.2	4.3
Total expenses	5.2	3.7	18.4	12.1
Pre-tax (loss) income from continuing operations	23.3	12.6	70.4	8.9
Asset Management (Kudu) | Marketing Technology (MediaAlpha)
Revenues:
Net realized and unrealized investment (losses) gains from investment in MediaAlpha	0.0	0.0	0.0	0.0
Other Operations
Revenues:
Earned insurance premiums	0.0	0.0	0.0	0.0
Net investment income	5.0	60.1	16.1	79.3
Net realized and unrealized investment (losses) gains	15.3	43.6	34.0	(17.4)
Commission revenues	2.4	2.1	7.0	6.1
Other revenues	28.1	2.2	57.6	6.0
Total revenues	(346.0)	358.0	(210.8)	369.0
Expenses:
Loss and loss adjustment expenses	0.0		0.0
Insurance and reinsurance acquisition expenses	0.0	0.0	0.0	0.0
Cost of sales	24.0	2.3	45.9	6.5
General and administrative expenses	14.5	44.3	79.7	87.1
Broker commission expenses	0.0	0.0	0.0	0.0
Change in fair value of contingent consideration	0.0	0.0	0.0	0.0
Amortization of other intangible assets	2.0	0.2	2.9	0.6
Loss on assets held for sale			0.0
Interest expense	0.4	0.3	1.1	0.8
Total expenses	40.9	47.1	129.6	95.0
Pre-tax (loss) income from continuing operations	(386.9)	310.9	(340.4)	274.0
Other Operations | Marketing Technology (MediaAlpha)
Revenues:
Net realized and unrealized investment (losses) gains from investment in MediaAlpha	$ (396.8)	$ 250.0	$ (325.5)	$ 295.0

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