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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
+18.51%
1 Year Est. Return
+14.8%
3 Year Est. Return
+45.79%
5 Year Est. Return
-49.99%
10 Year Est. Return
–
AUM
$196M
AUM Growth
-$90.4M
Cap. Flow
-$121M
Cap. Flow %
-61.85%
Top 10 Hldgs %
100%
Holding
2
New
–
Increased
–
Reduced
–
Closed
1

Top Buys

No buys this quarter

Top Sells

Rank Stock Value
1
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$121M

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
$196M 100%
17,856,614
– –
SPY icon
2
State Street SPDR S&P 500 ETF Trust
SPY
$771B
– –
-216,197
Closed -$121M

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White Mountains Insurance Group's Q2 2025 Portfolio in Review

As of Q2 2025, White Mountains Insurance Group held 2 positions worth $196M, down 32% from $286M the previous quarter. Its ten largest holdings account for 100% of the portfolio.

White Mountains Insurance Group withdrew a net $121M in Q2 2025, closing 1 position. Its most notable exit was State Street SPDR S&P 500 ETF Trust, an estimated $121M position sold in full.

By sector, the portfolio is most concentrated in Communication Services at 100% of assets, up from 58% a quarter earlier.

  • White Mountains Insurance Group fully exited State Street SPDR S&P 500 ETF Trust in Q2 2025, selling an estimated $121M.
  • White Mountains Insurance Group's ten largest holdings make up 100% of its $196M portfolio in Q2 2025.
  • White Mountains Insurance Group opened 0 new positions and closed 1 in Q2 2025.
  • White Mountains Insurance Group's portfolio value fell 32% quarter-over-quarter to $196M.

Based on White Mountains Insurance Group's 13F filing for Q2 2025, filed 11 Aug 2025.