Filed: 11/13/2025ACC: 0001104659-25-110906
📋 What this filing means
WHITE MOUNTAINS INSURANCE GROUP LTD filed this quarterly 13F‑HR report disclosing 1 equity positions with a total reported market value of $203.21M. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
1
Positions
$203.21M
Total AUM (reported)
17.86M
Total Shares
Allocation by class
CL A$203.21M100.0%
Portfolio Concentration
Top 3$203.21M100.0%
Top 3 weight
100.0%
Top 10 weight
100.0%
Voting Authority Distribution
Total shares with voting rights: 17.86M
Sole
Full voting authority
17.86M
shares
% of voting shares100.0%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
0.00
shares
% of voting shares0.0%
Investment Discretion (by position count)
Sole1
Shared0
Other0
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings1
Rows:
MEDIAALPHA INC
SOLEShares17.86M
TypeSH
Market value$203.21M
100.00%
Sole
17.86M
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
MEDIAALPHA INCSOLE | CL A | 17.86M | SH | $203.21M 100.00% | 17.86M | 0.00 | 0.00 |