WHITE MOUNTAINS INSURANCE GROUP LTD

Insurance

CIK

776867

City

HANOVER

State / Country

Stock

MAX — MediaAlpha, Inc.

Top Portfolio Positions

2 positions · $313,368,520 total · as of Mar 31, 2026

Ticker	Company	Shares	Value (USD)	% of Portfolio	Open
MAX	MediaAlpha, Inc. Communication Services	17,856,614	$166,066,510	52.99%
SPY	Spdr S&P 500 ETF Trust	226,500	$147,302,010	47.01%

22 quarters · across all stocks

24 quarters on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-04-29	$177,762,592	17,856,614	0.0%	Shares	Sole	2026-05-01
2026-03-31	$166,066,510	17,856,614	0.0%	Shares	Sole	2026-05-12
2025-12-31	$231,243,151	17,856,614	0.0%	Shares	Sole	2026-02-12
2025-09-30	$203,208,267	17,856,614	0.0%	Shares	Sole	2025-11-13
2025-08-08	$195,529,923	17,856,614	0.0%	Shares	Sole	2025-08-08
2025-06-30	$195,529,923	17,856,614	0.0%	Shares	Sole	2025-08-11
2025-03-31	$164,995,113	17,856,614	0.0%	Shares	Sole	2025-05-12
2024-12-31	$201,601,172	17,856,614	0.0%	Shares	Sole	2025-02-12
2024-09-30	$323,383,279	17,856,614	0.0%	Shares	Sole	2024-11-12
2024-06-30	$235,171,606	17,856,614	-21.9%	Shares	Sole	2024-08-08
2024-03-31	$465,593,301	22,856,814	0.0%	Shares	Sole	2024-05-09
2023-12-31	$254,853,476	22,856,814	0.0%	Shares	Sole	2024-02-13
2023-09-30	$188,797,283	22,856,814	0.0%	Shares	Sole	2023-11-09
2023-06-30	$235,653,752	22,856,814	+34.9%	Shares	Sole	2023-08-10
2023-03-31	$253,761,170	16,939,998	0.0%	Shares	Sole	2023-05-11
2022-12-31	$168,552,980	16,939,998	0.0%	Shares	Sole	2023-02-13
2022-09-30	$148,224,982	16,939,998	0.0%	Shares	Sole	2022-11-09
2022-06-30	$166,858,980	16,939,998	0.0%	Shares	Sole	2022-08-12
2022-03-31	$280,356,966	16,939,998	0.0%	Shares	Sole	2022-05-12
2021-12-31	$261,553,569	16,939,998	0.0%	Shares	Sole	2022-02-11
2021-09-30	$316,439,162	16,939,998	0.0%	Shares	Sole	2021-11-12
2021-06-30	$713,173,915	16,939,998	0.0%	Shares	Sole	2021-08-12
2021-03-31	$600,184,129	16,939,998	-17.5%	Shares	Sole	2021-05-14
2020-12-31	$802,193,132	20,532,202	—	Shares	Sole	2021-02-12
No 13F history on record for this holder in this stock.