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Home/Companies/White Mountains Insurance Group, Ltd.

White Mountains Insurance Group, Ltd.

47 insider trades tracked

WTM
Insider trades
47
Bought (open market)
$0
Sold (open market)
$10.6M
Unique insiders
16

12-month activity

Monthly insider buy vs sell totals for White Mountains Insurance Group, Ltd..

BuysSellsFilings with no price (gifts, grants)
Show data table
MonthBuysSellsFilings
October 2025$0$00
November 2025$0$02
December 2025$0$10.6M4
January 2026$0$04
February 2026$0$05
March 2026$0$02
April 2026$0$00
May 2026$0$09
June 2026$0$00
July 2026$0$00
August 2026$0$02
September 2026$0$00

Recent insider trades

Most recent Form 4 filings for White Mountains Insurance Group, Ltd..

  • Tanner David Allengifted2 shares ofWTMat $0Aug 31Details
  • Klar Stephengranted113 shares ofWTMat $0Aug 26 · filed Aug 27Details
  • Chu Johngranted135 shares ofWTMat $0May 21 · filed May 22Details

Insiders at this company

Executives and directors who have filed Form 4s.

  • Hildreth Michaela7 trades
  • SEELIG ROBERT LAWRENCE7 trades
  • CAMPBELL REID TARLTON6 trades
  • Rountree George Manning5 trades
  • Caffrey Liam P5 trades
  • Tanner David Allen4 trades
  • Harrison Giles E2 trades
  • Gelston Philip A2 trades

Explore insider screeners

Latest CEO & CFO PurchasesLatest CEO & CFO SalesDirector PurchasesOfficer PurchasesTop Purchases This WeekTop Sales This WeekTop Officer Buys (Month)10% Owner Filings10b5-1 Planned TradesDiscretionary TradesBuy/Sell RatiosPolitician-Insider Overlap
Dillon Margaret
granted
135 shares of
WTM
at $0
May 21 · filed May 22Details
  • Gelston Philip Agranted135 shares ofWTMat $0May 21 · filed May 22Details
  • SHANK SUZANNE F.granted135 shares ofWTMat $0May 21 · filed May 22Details
  • Carlson Peter Mgranted135 shares ofWTMat $0May 21 · filed May 22Details
  • CAMPBELL REID TARLTONgranted135 shares ofWTMat $0May 21 · filed May 22Details
  • Tanner David Allengranted135 shares ofWTMat $0May 21 · filed May 22Details
  • CHOKSI MARY Cgranted135 shares ofWTMat $0May 21 · filed May 22Details
  • Hicks Weston Mgranted190 shares ofWTMat $0May 21 · filed May 22Details
  • SEELIG ROBERT LAWRENCEgifted50 shares ofWTMat $0Mar 19 · filed Mar 20Details
  • Tanner David Allengifted225 shares ofWTMat $0Mar 4 · filed Mar 5Details
  • Papamichael Michael Agranted500 shares ofWTMat $0Feb 25 · filed Feb 27Details
  • Harrison Giles Egranted775 shares ofWTMat $0Feb 25 · filed Feb 27Details
  • Caffrey Liam Pgranted1,500 shares ofWTMat $0Feb 25 · filed Feb 27Details
  • Hildreth Michaelagranted600 shares ofWTMat $0Feb 25 · filed Feb 27Details
  • SEELIG ROBERT LAWRENCEgranted775 shares ofWTMat $0Feb 25 · filed Feb 27Details
  • Papamichael Michael Atax-withheld131 shares ofWTMat $2,078.03$272KJan 1 · filed Jan 2Details
  • Caffrey Liam Ptax-withheld425 shares ofWTMat $2,078.03$883KJan 1 · filed Jan 2Details
  • Hildreth Michaelatax-withheld274 shares ofWTMat $2,078.03$569KJan 1 · filed Jan 5Details
  • SEELIG ROBERT LAWRENCEtax-withheld398 shares ofWTMat $2,078.03$827KJan 1 · filed Jan 2Details
  • Hildreth Michaelagifted60 shares ofWTMat $0Dec 23, 2025Details
  • Rountree George Manningsold5,000 shares ofWTMat $2,050$10.3MDec 19, 2025 · filed Dec 22, 2025Details
  • CAMPBELL REID TARLTONsold5,000 shares ofWTMat $0Dec 19, 2025 · filed Dec 22, 2025Details
  • Gelston Philip Asold165 shares ofWTMat $2,048.51$338KDec 16, 2025Details
  • CAMPBELL REID TARLTONgifted50 shares ofWTMat $0Nov 25, 2025 · filed Nov 26, 2025Details
  • Tanner David Allengifted4 shares ofWTMat $0Nov 10, 2025Details
  • Rountree George Manninggranted1,625 shares ofWTMat $0Feb 26, 2025 · filed Feb 28, 2025Details
  • Caffrey Liam Pgranted1,025 shares ofWTMat $0Feb 26, 2025 · filed Feb 28, 2025Details
  • View all trades for WTM →
    Papamichael Michael A
    2 trades
  • Hicks Weston M1 trades
  • CHOKSI MARY C1 trades
  • Carlson Peter M1 trades
  • SHANK SUZANNE F.1 trades
  • Dillon Margaret1 trades
  • Chu John1 trades
  • Klar Stephen1 trades