White Mountains Insurance Group Ltd

T. Rowe Price Investment Management, Inc. WTM

Report date

3/31/2026

Quarter

2026 Q1

Filed

5/15/2026

Shares

41,513

Value ($000)

91,203

Weight

0.1%

2025 Q2 - 2026 Q1 (4 filings)

Shares History

History scope: non-option holdings only (PUT/CALL rows excluded).

All 13F Holders	Filing date	Value ($000s)	% of Holdings	Shares	Reporting period
2026 Q1	5/15/2026	91,203	0.1%	41,513	3/31/2026
2025 Q4	2/17/2026	13,844	0.0%	6,662	12/31/2025
2025 Q3	11/14/2025	79,852	0.0%	47,772	9/30/2025
2025 Q2	8/14/2025	113,025	0.1%	62,941	6/30/2025