Institutional Ownership White Mountains Insurance Group LTD (WTM)
This table provides information about the institutional ownership of White Mountains Insurance Group LTD (WTM). We have compiled data on the 379 institutions that hold shares in the stock, with a total of 2.55 Million shares, which have been reported (via 13F filing form) to have a value of $4.92 Billion.
| Holding | Report Date | shares Held | Holding Value (Reported) | Last Trade | Trade History |
|---|---|---|---|---|---|
|
Mraz, Amerine & Associates, Inc.
|
Nov 06, 2025 Q3 2025 |
22,606
shares
|
$43.5 Million
6.27% of portfolio
|
Q3 2025
Added 4.77%
|
|
|
Raymond James & Associates
St Petersburg, FL |
Oct 18, 2024 Q3 2024 |
21,743
shares
|
$41.8 Million
0.02% of portfolio
|
Q3 2024
Reduced 4.17%
|
|
|
Brown Advisory Inc
|
Nov 14, 2025 Q3 2025 |
20,332
shares
|
$39.1 Million
0.05% of portfolio
|
Q3 2025
Reduced 2.5%
|
|
|
Wellington Management Group LLP
Boston, MA |
Nov 14, 2025 Q3 2025 |
19,211
shares
|
$37 Million
0.01% of portfolio
|
Q3 2025
Reduced 22.07%
|
|
|
Pendal Group LTD
|
Jan 19, 2023 Q4 2022 |
17,788
shares
|
$34.2 Million
0.21% of portfolio
|
Q3 2022
Reduced 16.93%
|
|
|
Northern Trust Corp
Chicago, IL |
Nov 14, 2025 Q3 2025 |
17,757
shares
|
$34.2 Million
0.0% of portfolio
|
Q3 2025
Added 2.02%
|
|
|
Envestnet Asset Management Inc
|
Nov 04, 2025 Q3 2025 |
17,591
shares
|
$33.9 Million
0.01% of portfolio
|
Q3 2025
Added 0.46%
|
|
|
Robeco Institutional Asset Management B.V.
|
Oct 22, 2025 Q3 2025 |
17,239
shares
|
$33.2 Million
0.04% of portfolio
|
Q3 2025
Reduced 3.27%
|
|
|
Select Equity Group, L.P.
New York, NY |
Nov 14, 2025 Q3 2025 |
16,946
shares
|
$32.6 Million
0.14% of portfolio
|
Q3 2025
Reduced 5.18%
|
|
|
Elkhorn Partners Limited Partnership
Omaha, NE |
Nov 13, 2025 Q3 2025 |
14,810
shares
|
$28.5 Million
16.87% of portfolio
|
Q3 2025
Reduced 0.6%
|
|
|
Wcm Investment Management, LLC
Laguna Beach, CA |
Nov 04, 2025 Q3 2025 |
13,235
shares
|
$25.5 Million
0.05% of portfolio
|
Q3 2025
Added 1.05%
|
|
|
Horizon Kinetics Asset Management LLC
|
Nov 14, 2025 Q3 2025 |
13,084
shares
|
$25.2 Million
0.31% of portfolio
|
Q3 2025
Added 19.26%
|
|
|
Scout Investments, Inc.
|
Nov 12, 2024 Q3 2024 |
12,839
shares
|
$24.7 Million
0.64% of portfolio
|
Q3 2024
Reduced 14.25%
|
|
|
Ubs Group Ag
|
Nov 13, 2025 Q3 2025 |
12,085
shares
|
$23.3 Million
0.0% of portfolio
|
Q3 2025
Added 141.12%
|
|
|
Speece Thorson Capital Group Inc
|
Nov 20, 2025 Q3 2025 |
11,262
shares
|
$21.7 Million
3.76% of portfolio
|
Q3 2025
Reduced 1.06%
|
|
|
Wells Fargo & Company
San Francisco, CA |
Nov 13, 2025 Q3 2025 |
9,352
shares
|
$18 Million
0.0% of portfolio
|
Q3 2025
Reduced 2.45%
|
|
|
California Public Employees Retirement System
Sacramento, CA |
Nov 14, 2025 Q3 2025 |
9,232
shares
|
$17.8 Million
0.01% of portfolio
|
Q3 2025
Reduced 11.18%
|
|
|
Thompson Siegel & Walmsley LLC
|
Nov 12, 2025 Q3 2025 |
8,652
shares
|
$16.7 Million
0.23% of portfolio
|
Q3 2025
Added 4.18%
|
|
|
Victory Capital Management Inc
|
Nov 12, 2025 Q3 2025 |
8,526
shares
|
$16.4 Million
0.01% of portfolio
|
Q3 2025
Reduced 51.67%
|
|
|
Perpetual LTD
Sydney, New South Wales, C3 |
Oct 10, 2025 Q3 2025 |
8,127
shares
|
$15.6 Million
0.17% of portfolio
|
Q3 2025
Added 5.18%
|
|
|
Gw&K Investment Management, LLC
Boston, MA |
Nov 12, 2025 Q3 2025 |
8,010
shares
|
$15.4 Million
0.12% of portfolio
|
Q3 2025
Reduced 3.17%
|
|
|
Nuveen Asset Management, LLC
Chicago, IL |
Feb 14, 2025 Q4 2024 |
7,753
shares
|
$14.9 Million
0.0% of portfolio
|
Q4 2024
Reduced 0.06%
|
|
|
Susquehanna International Group, LLP
Bala Cynwyd, PA |
Nov 14, 2025 Q3 2025 |
7,360
shares
|
$14.2 Million
0.0% of portfolio
|
Q3 2025
Added 2455.56%
|
|
|
Hotchkis & Wiley Capital Management LLC
Los Angeles, CA |
Nov 14, 2025 Q3 2025 |
7,106
shares
|
$13.7 Million
0.04% of portfolio
|
Q3 2025
Added 3.45%
|
|
|
Joel Greenblatt
Gotham Asset Management, LLC | New York, Ny
|
Nov 14, 2025 Q3 2025 |
6,899
shares
|
$13.3 Million
0.05% of portfolio
|
Q3 2025
Added 618.65%
|
|