LIVE FROM THE DATABASETRANSACTIONS 362,114COMPANIES 5,761LATEST TRADE Oct 16UPDATED Oct 16, 09:12 PM
WTMCIK 0000776867

WHITE MOUNTAINS INSURANCE GROUP LTD

24 transactions by 15 insiders, from November 25, 2025 to August 31, 2026.

Transactions
2415 insiders
Bought · P
Nonenobody bought on the open market
Sold · S
Nonenobody sold on the open market
Net
+$0net buying

Officers and directors

People inside the company. What they do with their own shares is the reason this data exists.

InsiderTradesPlannedBoughtSold
David Allen TannerDir3———
Reid Tarlton CampbellDir3———
Robert Lawrence SeeligGC3———
Michaela HildrethCAO2———
Liam P. CaffreyCEO2———
Michael A. PapamichaelCFO2———
Margaret DillonDir1———
Giles E. HarrisonPres1———
Weston M. HicksDir1———
John ChuDir1———
Mary C. ChoksiDir1———
Peter M. CarlsonDir1———
Stephen KlarDir1———
Suzanne F. ShankDir1———
Philip A. GelstonDir1———

All transactions

24 in total, newest filings first.

InsiderDateCodeSharesPriceValue
David Allen TannerDirAug 31G2$0.00—
Stephen KlarDirAug 26A113$0.00—
David Allen TannerDirMay 21A135$0.00—
Suzanne F. ShankDirMay 21A135$0.00—
Weston M. HicksDirMay 21A190$0.00—
Philip A. GelstonDirMay 21A135$0.00—
Margaret DillonDirMay 21A135$0.00—
John ChuDirMay 21A135$0.00—
Peter M. CarlsonDirMay 21A135$0.00—
Mary C. ChoksiDirMay 21A135$0.00—
Reid Tarlton CampbellDirMay 21A135$0.00—
Robert Lawrence SeeligGCMar 19G50$0.00—
David Allen TannerDirMar 4G225$0.00—
Robert Lawrence SeeligGCFeb 25A775$0.00—
Michael A. PapamichaelCFOFeb 25A500$0.00—
Michaela HildrethCAOFeb 25A600$0.00—
Giles E. HarrisonPresFeb 25A775$0.00—
Liam P. CaffreyCEOFeb 25A1,500$0.00—
Michaela HildrethCAOJan 1F274$2,078.03$569K
Robert Lawrence SeeligGCJan 1F398$2,078.03$827K
Michael A. PapamichaelCFOJan 1F131$2,078.03$272K
Liam P. CaffreyCEOJan 1F425$2,078.03$883K
Reid Tarlton CampbellDirDec 19S5,000$0.00—
Reid Tarlton CampbellDirNov 25G50$0.00—