Latest White Mountains Insurance Group Ltd Stock Portfolio

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 30-Jun-2023, the fund reported that it had an AUM (Regulated Assets under Management) of $699.9 Millions. In it's latest 13F Holdings report, WHITE MOUNTAINS INSURANCE GROUP LTD reported an equity portfolio of $203.2 Millions as of 30 Sep, 2025.

The top stock holdings of WHITE MOUNTAINS INSURANCE GROUP LTD are MAX. The fund has invested 100% of it's portfolio in MEDIAALPHA INC and NA% of portfolio in NA.

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

New Buys

No new stocks were added by White Mountains Insurance Group Ltd

Additions

No additions were made to existing positions 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

Sector	%
Communication Services	100

Market Cap. Distribution

Category	%
SMALL-CAP	100

Stocks belong to which Index?

Index	%
RUSSELL 2000	100

Top 5 Winners (%)		%
MAX	mediaalpha inc	3.9 %

Top 5 Winners ($)		$
MAX	mediaalpha inc	7.7 M

Top 5 Losers (%)		%

Top 5 Losers ($)		$

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

Last Reported on: 13 Nov, 2025

	Ticker	Namesorted ascending	% Portfolio	Shares Held	$ Value	Type	% Change	Options
	MAX	mediaalpha inc	100	17,856,600	203,208,000	unchanged	0.00