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Latest White Mountains Insurance Group Ltd Stock Portfolio

$313Million | No. of Holdings #2

About White Mountains Insurance Group Ltd and 13F Hedge Fund Stock Holdings

WHITE MOUNTAINS INSURANCE GROUP LTD is a hedge fund based in New York, NY. On 2026-05-12, the fund reported it's updated stock portfolio. In the 13F Holdings report, WHITE MOUNTAINS INSURANCE GROUP LTD reported an equity portfolio of $313.4 Millions as of 31 Mar, 2026. <br><br> The top stock holdings of WHITE MOUNTAINS INSURANCE GROUP LTD are MAX, SPY. The fund has invested 53% of it's portfolio in MEDIAALPHA INC and 47% of portfolio in SPDR S&P 500 ETF TR. <br><br> The fund showed a lot of confidence in some stocks as they added substantially to SPDR S&P 500 ETF TR (SPY).
White Mountains Insurance Group Ltd Equity Portfolio Value
Last Reported on: 12 May, 2026
$313Million
  as of May 12, 2026

White Mountains Insurance Group Ltd Annual Return Estimates Vs S&P 500

  • Performance

New Buys

No new stocks were added by White Mountains Insurance Group Ltd

Additions

Ticker% Inc.
spdr s&p 500 etf tr403
Additions to existing portfolio by White Mountains Insurance Group Ltd

Reductions

None of the existing positions were reduced by White Mountains Insurance Group Ltd

Sold off

None of the stocks were completely sold off by White Mountains Insurance Group Ltd

Sector Distribution

  • Communication Services
  • Others
Sector%
Communication Services53
Others47

Market Cap. Distribution

  • SMALL-CAP
  • UNALLOCATED
Category%
SMALL-CAP53
UNALLOCATED47

Stocks belong to which Index?

  • RUSSELL 2000
  • Others
Index%
RUSSELL 200053
Others47
Top 5 Winners (%)%
Top 5 Winners ($)$
Top 5 Losers (%)%
MAX
mediaalpha inc
-28.2 %
SPY
spdr s&p 500 etf tr
-2.8 %
Top 5 Losers ($)$
MAX
mediaalpha inc
-65.2 M
SPY
spdr s&p 500 etf tr
-4.3 M

White Mountains Insurance Group Ltd Holdings Map

This heatmap illustrates the top 50 positions within the fund's portfolio.

Current Stock Holdings of White Mountains Insurance Group Ltd

$313.37MTotal Value
2.00Positions
12 May, 2026Last Reported
Current holdings of Current Stock Holdings of White Mountains Insurance Group Ltd, last reported on 12 May, 2026. Select a row with a linked ticker to view its historical trend.
ExpandHoldingsorted ascending% PortfolioShares Held$ Value% Change
SPY
Spdr S&P 500 Etf Tr

Spdr S&P 500 Etf Tr

SPY
White Mountains Insurance Group Ltd's holding in Spdr S&P 500 Etf Tr over time
47.01%226,500
$147.30M
47.01%
increased 403.33 percentadded