SOUTHEASTERN ASSET MANAGEMENT INC/TN/

Position in WTM — White Mountains Insurance Group Ltd

CIK 807985 MEMPHIS, TN

Position in WTM

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$41,443,452

-$24,330,353 QoQ

Shares Held

18,864

-40.4% QoQ

Ownership

0.790%

of shares outstanding

% of Portfolio

2.12%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Dec 2021

18 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Financial Services · as of Mar 31, 2026

SOUTHEASTERN ASSET MANAGEMENT INC/TN/ holds $41,443,452 across 1 Insurance - Property & Casualty name. WTM ranks #1 (100.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)	Open
1	WTM	White Mountains Insurance Group Ltd This page	18,864	$41,443,452

18 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$41,443,452	18,864	-40.4%	Shares	Sole	2026-05-15
2025-12-31	$65,773,805	31,652	0.0%	Shares	Sole	2026-02-13
2025-09-30	$52,906,950	31,652	+50.1%	Shares	Sole	2025-11-14
2025-06-30	$37,878,917	21,094	+14.1%	Shares	Sole	2025-08-14
2025-03-31	$35,596,673	18,484	-3.9%	Shares	Sole	2025-05-15
2024-12-31	$37,430,736	19,244	-7.2%	Shares	Sole	2025-02-14
2024-09-30	$35,176	20,738	-3.2%	Shares	Sole	2024-11-14
2024-06-30	$38,935,231	21,423	-13.3%	Shares	Sole	2024-08-14
2024-03-31	$44,333,563	24,708	-23.8%	Shares	Sole	2024-05-15
2023-12-31	$48,831,553	32,446	-1.5%	Shares	Sole	2024-02-14
2023-09-30	$49,275,503	32,945	-22.0%	Shares	Sole	2023-11-14
2023-06-30	$58,635,613	42,217	-21.1%	Shares	Sole	2023-08-14
2023-03-31	$73,741,171	53,533	-3.5%	Shares	Sole	2023-05-15
2022-12-31	$78,485,414	55,493	-50.7%	Shares	Sole	2023-02-14
2022-09-30	$146,716,142	112,597	-10.4%	Shares	Sole	2022-11-14
2022-06-30	$156,517,665	125,603	+0.1%	Shares	Sole	2022-08-12
2022-03-31	$142,601,528	125,503	+143.2%	Shares	Sole	2022-05-16
2021-12-31	$52,319,267	51,602	—	Shares	Sole	2022-02-15
No filing history on record for this holder in this stock.