WTM Pre-Tax Margin - WHITE MOUNTAINS INSURANCE GROUP LTD

Complete source-backed pre-tax margin history.

Available history: 2008-12-31 to 2026-06-30
Data captured: 2026-09-04

Historical Pre-Tax Margin

Date	Pre-Tax Margin
2026-06-30	238.14%
2026-03-31	-4.92%
2025-12-31	56.18%
2025-09-30	20.69%
2025-06-30	313.50%
2025-03-31	12.53%
2024-12-31	-33.72%
2024-09-30	28.54%
2024-06-30	-8.78%
2024-03-31	35.93%
2023-12-31	44.49%
2023-09-30	4.06%
2023-06-30	4.60%
2023-03-31	37.43%
2022-12-31	29.48%
2022-09-30	-8.09%
2022-06-30	-303.26%
2022-03-31	-12.56%
2021-12-31	25.49%
2021-09-30	-319.40%
2021-06-30	147.53%
2021-03-31	-165.91%
2020-12-31	445.57%
2020-09-30	429.41%
2020-06-30	165.46%
2020-03-31	-242.34%
2019-12-31	90.26%
2019-09-30	79.47%
2019-06-30	23.24%
2019-03-31	283.40%
2018-12-31	-378.22%
2018-09-30	22.29%
2018-06-30	-10.14%
2018-03-31	-156.77%
2017-12-31	-5.41%
2017-09-30	9.60%
2017-06-30	-2.63%
2017-03-31	-4.05%
2016-12-31	1354.55%
2016-09-30	-24.30%
2016-06-30	-51.02%
2016-03-31	2.30%
2015-12-31	-37.68%
2015-09-30	-29.35%
2015-06-30	-1.38%
2015-03-31	0.13%
2014-12-31	-18.23%
2014-09-30	-10.98%
2014-06-30	16.76%
2014-03-31	19.44%
2013-12-31	15.83%
2013-09-30	9.63%
2013-06-30	0.74%
2013-03-31	24.20%
2012-12-31	-8.97%
2012-09-30	19.37%
2012-06-30	6.93%
2012-03-31	22.36%
2011-12-31	16.58%
2011-09-30	0.26%
2011-06-30	6.52%
2011-03-31	-6.36%
2010-12-31	41.21%
2010-09-30	13.65%
2010-06-30	0.58%
2010-03-31	-2.58%
2009-12-31	14.78%
2009-09-30	21.48%
2009-06-30	24.92%

Annual Pre-Tax Margin

Date	Pre-Tax Margin
2025-12-31	35.57%
2024-12-31	14.14%
2023-12-31	26.09%
2022-12-31	-12.90%
2021-12-31	-64.00%
2020-12-31	214.49%
2019-12-31	137.65%
2018-12-31	-44.42%
2017-12-31	4.77%
2016-12-31	-93.41%
2015-12-31	29.36%
2014-12-31	-2.08%
2013-12-31	11.65%
2012-12-31	10.79%
2011-12-31	4.51%
2010-12-31	8.11%
2009-12-31	23.15%
2008-12-31	-38.65%