WHITE MOUNTAINS INSURANCE GROUP LTD

SEC insider activity covers quarterly filings through June 30, 2026. Later filings are not included. Reported roles do not establish current employment or current holdings. SEC filing documents, sections and filing-text search cover filings dated January 1, 2000 onward. Earlier filings are deferred until after launch.

WTM

organization

SIC: 6331

SEC Insider

$371.7M

968 transactions

Summary

WHITE MOUNTAINS INSURANCE GROUP LTD (WTM) is an organization.

Recent Insider Transactions

As filed, including amendments; not net cash flow or current holdings. Joint reports count once. Totals cover known values only.

Buys: $18.0MSales: $76.7M42 insiders

Date	Insider	Type	Value
2026-01-01	Caffrey Liam P(Chief Executive Officer)	F	$883K
2026-01-01	SEELIG ROBERT LAWRENCE(EVP & General Counsel)	F	$827K
2026-01-01	Hildreth Michaela(MD & Chief Accounting Officer)	F	$569K
2026-01-01	Papamichael Michael A(Chief Financial Officer)	F	$272K
2026-05-21	CAMPBELL REID TARLTON	A	$0
2026-05-21	Carlson Peter M	A	$0
2026-05-21	CHOKSI MARY C	A	$0
2026-05-21	Chu John	A	$0
2026-05-21	Dillon Margaret	A	$0
2026-05-21	Gelston Philip A	A	$0
2026-05-21	Hicks Weston M	A	$0
2026-05-21	SHANK SUZANNE F.	A	$0
2026-05-21	Tanner David Allen	A	$0
2026-03-19	SEELIG ROBERT LAWRENCE(EVP & General Counsel)	G	$0
2026-03-04	Tanner David Allen	G	$0
2026-02-25	SEELIG ROBERT LAWRENCE(EVP & General Counsel)	A	$0
2026-02-25	Papamichael Michael A(Chief Financial Officer)	A	$0
2026-02-25	Hildreth Michaela(MD & Chief Accounting Officer)	A	$0
2026-02-25	Harrison Giles E(President)	A	$0
2026-02-25	Caffrey Liam P(Chief Executive Officer)	A	$0

SEC filings: SEC EDGAR

Activity data: SEC EDGAR

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