NYSE: WTM
White Mountains Insurance Group Ltd Stock Ownership - Who owns White Mountains Insurance Group?

Insider buying vs selling

Have White Mountains Insurance Group Ltd insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Liam P. CaffreyPresident CFO2025-01-01420$1.95k
$816.93kSell
Michaela HildrethMD Chief Accounting Officer2025-01-01323$1.95k
$628.25kSell
George Manning RountreeChief Executive Officer2025-01-011,067$1.95k
$2.08MSell
Robert Lawrence SeeligEVP General Counsel2025-01-01496$1.95k
$964.75kSell

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Net Insider Buy/Sell (L12M) Ownership

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WTM Shareholders

What type of owners hold White Mountains Insurance Group Ltd stock?

Institutional
Insider
Retail
NameHoldSharesValueType
John Joseph Byrne30.74%789,535$1.52BInsider
John Davies Gillespie11.80%303,039$582.10MInsider
Vanguard Group Inc9.77%250,783$481.72MInstitution
Morgan Stanley6.97%179,037$343.91MInstitution
Dimensional Fund Advisors LP6.17%158,534$304.52MInstitution
Fuller Thaler Asset Management Inc4.76%122,277$234.88MInstitution
River Road Asset Management LLC4.60%118,206$227.06MInstitution
Blackrock Inc 14.48%115,123$221.14MInstitution
Blackrock Inc4.48%115,123$221.14MInstitution
Berkshire Hathaway Inc3.48%89,279$171.49MInsider

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WTM vs Property & Casualty Insurance Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
WTM60.94%39.06%Net SellingNet Selling
SIGI82.89%4.30%Net Selling
KMPR63.54%36.46%Net SellingNet Selling
THG87.30%5.06%Net SellingNet Selling
HGTY21.67%22.76%Net SellingNet Selling

White Mountains Insurance Group Stock Ownership FAQ

Who owns White Mountains Insurance Group?

White Mountains Insurance Group (NYSE: WTM) is owned by 86.26% institutional shareholders, 55.28% White Mountains Insurance Group insiders, and 0.00% retail investors. John Joseph Byrne is the largest individual White Mountains Insurance Group shareholder, owning 789,535.00 shares representing 30.74% of the company. John Joseph Byrne's White Mountains Insurance Group shares are currently valued at $1.56B.

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