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WMIG

White Mountains Insurance Group Portfolio holdings

AUM $313M
1-Year Est. Return 14.8%
This Fund
S&P 500
This Quarter Est. Return
+3.93%
1 Year Est. Return
+14.8%
3 Year Est. Return
+45.79%
5 Year Est. Return
-49.99%
10 Year Est. Return
–
AUM
$203M
AUM Growth
+$7.68M
Cap. Flow
$0
Cap. Flow %
0%
Top 10 Hldgs %
100%
Holding
1
New
–
Increased
–
Reduced
–
Closed
–

Top Buys

No buys this quarter

Top Sells

No sells this quarter

Sector Composition

Rank Sector Weight
1 Communication Services 100%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
MAX icon
1
MediaAlpha
MAX
$746M
$203M 100%
17,856,614
– –

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White Mountains Insurance Group's Q3 2025 Portfolio in Review

As of Q3 2025, White Mountains Insurance Group held 1 position worth $203M, up 3.9% from $196M the previous quarter. Its ten largest holdings account for 100% of the portfolio.

Trading was light in Q3 2025: portfolio turnover was 0%. White Mountains Insurance Group opened no new positions and made no exits, leaving the 1-position portfolio largely intact.

By sector, the portfolio is most concentrated in Communication Services at 100% of assets, unchanged from a quarter earlier.

  • White Mountains Insurance Group's ten largest holdings make up 100% of its $203M portfolio in Q3 2025.
  • White Mountains Insurance Group opened 0 new positions and closed 0 in Q3 2025.
  • White Mountains Insurance Group's portfolio value rose 3.9% quarter-over-quarter to $203M.

Based on White Mountains Insurance Group's 13F filing for Q3 2025, filed 13 Nov 2025.