Vanguard Portfolio Management
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Vanguard Portfolio Management’s White Mountains Insurance WTM Stock Holding History

Vanguard Portfolio Management’s Portfolio WTM Stock Details WTM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$232M Sell
111,969
-3,584
-3% -$7.67M 0.01% 1128
2026
Q1 		$254M Buy
+115,553
New +$247M 0.01% 997

Other funds holding WTM

Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Neuberger Berman Group
Neuberger Berman Group New York $150B AUM 40.08% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
RRAM
River Road Asset Management Louisville, Kentucky $8.99B AUM 12.83% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management San Mateo, California $36.7B AUM 74.15% 1-Year Est. Return
CB
Cooke & Bieler Philadelphia, Pennsylvania $8.65B AUM 9.66% 1-Year Est. Return
WCM
Wallace Capital Management Dallas, Texas $912M AUM 21.45% 1-Year Est. Return
FMI
Fiduciary Management Inc Milwaukee, Wisconsin $7.03B AUM 11.68% 1-Year Est. Return
GJL
Gendell Jeffrey L $11.3B AUM 163.06% 1-Year Est. Return

Vanguard Portfolio Management's WTM Position: Q2 2026 in Review

Vanguard Portfolio Management reduced its White Mountains Insurance (WTM) stake by 3.1% in Q2 2026, selling an estimated $7.67M and leaving 111,969 shares worth $232M. The position accounts for 0.01% of the portfolio, ranked #1128.

Vanguard Portfolio Management first reported a position in WTM in Q1 2026 and has held it in 2 quarters since. The position peaked at $254M in Q1 2026. 350 funds tracked by Wall St. Rank hold WTM as of Q2 2026.

  • Vanguard Portfolio Management held 111,969 shares of White Mountains Insurance worth $232M as of Q2 2026.
  • Vanguard Portfolio Management sold 3,584 White Mountains Insurance shares in Q2 2026, an estimated $7.67M.
  • White Mountains Insurance made up 0.01% of Vanguard Portfolio Management's portfolio in Q2 2026, its #1128 holding.
  • Vanguard Portfolio Management first reported a position in White Mountains Insurance in Q1 2026 and has held it in 2 quarters since.
  • Vanguard Portfolio Management's White Mountains Insurance position peaked at $254M in Q1 2026.
  • 350 funds tracked by Wall St. Rank held White Mountains Insurance as of Q2 2026.

Based on Vanguard Portfolio Management's 13F filing for Q2 2026, filed 13 Aug 2026.