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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
-17.11%
1 Year Est. Return
+14.8%
3 Year Est. Return
+45.79%
5 Year Est. Return
-49.99%
10 Year Est. Return
–
AUM
$313M
AUM Growth
+$51.4M
Cap. Flow
+$123M
Cap. Flow %
39.38%
Top 10 Hldgs %
100%
Holding
2
New
–
Increased
1
Reduced
–
Closed
–

Top Buys

Rank Stock Value
1
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$123M

Top Sells

No sells this quarter

Sector Composition

Rank Sector Weight
1 Communication Services 52.99%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
MAX icon
1
MediaAlpha
MAX
$758M
$166M 52.99%
17,856,614
– –
SPY icon
2
State Street SPDR S&P 500 ETF Trust
SPY
$790B
$147M 47.01%
226,500
+181,500
+403% +$123M

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MIM
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PAM
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SL
Sentry LLC Memphis, Tennessee $314M AUM 30.11% 1-Year Est. Return
TF
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EWA
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WIC
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White Mountains Insurance Group's Q1 2026 Portfolio in Review

As of Q1 2026, White Mountains Insurance Group held 2 positions worth $313M, up 20% from $262M the previous quarter. Its ten largest holdings account for 100% of the portfolio.

White Mountains Insurance Group deployed $123M of net new capital in Q1 2026, adding to 1 existing holding.

By sector, the portfolio is most concentrated in Communication Services at 53% of assets, down from 88% a quarter earlier.

  • White Mountains Insurance Group added most to State Street SPDR S&P 500 ETF Trust in Q1 2026, an estimated $123M increase.
  • White Mountains Insurance Group's ten largest holdings make up 100% of its $313M portfolio in Q1 2026.
  • White Mountains Insurance Group opened 0 new positions and closed 0 in Q1 2026.
  • White Mountains Insurance Group's portfolio value rose 20% quarter-over-quarter to $313M.

Based on White Mountains Insurance Group's 13F filing for Q1 2026, filed 12 May 2026.