WHITE MOUNTAINS INSURANCE GROUP LTD - Common Stock (WTM)

Historical Holders from Q1 2014 to Q3 2025

Symbol
WTM on NYSE
CUSIP
G9618E107
Type / Class
Equity / Common Stock
Shares outstanding
2.55M
All holders as of September 30, 2025
Q3 2025
Total 13F shares, excl. options
2.33M
Holdings value
$3.89B
% of all portfolios
0.008%
Grand Portfolio weight change
+0%
Number of holders
333
Number of buys
147
Number of sells
-131
Average Value change %
+0%
Average buys %
+0.001%
Average sells %
0%
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of WHITE MOUNTAINS INSURANCE GROUP LTD - Common Stock (WTM)

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
MORGAN STANLEY 5.2% -16.7% $222M -$44.1M 133K -16.6% Morgan Stanley Sep 30, 2025

Institutional Holders of WHITE MOUNTAINS INSURANCE GROUP LTD - Common Stock (WTM)

Period Reported Shares, Excl. Options Value, Excl. Options Change Price Investors
2025 Q3 2.33M $3.89B +$6.72M $1,671.52 333
2025 Q2 2.32M $4.16B +$76.3M $1,795.72 323
2025 Q1 2.28M $4.38B -$298K $1,925.81 317
2024 Q4 2.28M $4.43B +$123M $1,945.06 321
2024 Q3 2.19M $3.73B -$107M $1,696.20 302
2024 Q2 2.28M $4.14B +$92.5M $1,817.45 304
2024 Q1 2.23M $4B +$24.6M $1,794.30 298
2023 Q4 1.78K $2.68M -$13.5K $1,505.45 4
2023 Q3 2.04M $3.05B +$34.5M $1,495.69 268
2023 Q2 2.22M $3.09B -$41.8M $1,388.91 255
2023 Q1 2.23M $3.08B -$13.7M $1,377.49 258
2022 Q4 2.25M $3.18B +$154M $1,414.33 257
2022 Q3 2.25M $2.93B -$484M $1,303.02 238
2022 Q2 2.66M $3.31B -$1.36M $1,246.12 256
2022 Q1 2.66M $3.02B +$50.3M $1,136.23 239
2021 Q4 2.68M $2.71B -$5.48M $1,013.88 241
2021 Q3 2.67M $2.86B -$38.4M $1,069.62 227
2021 Q2 2.71M $3.11B +$8.1M $1,148.03 231
2021 Q1 2.71M $3.02B +$25.6M $1,114.90 244
2020 Q4 2.7M $2.7B -$493K $1,000.00 232
2020 Q3 2.55M $1.99B -$12M $779.00 208
2020 Q2 2.72M $2.42B -$14.6M $887.97 203
2020 Q1 2.71M $2.46B -$33.3M $910.00 224
2019 Q4 2.74M $3.06B -$32.8M $1,115.51 251
2019 Q3 2.77M $3B -$25.9M $1,080.00 248
2019 Q2 2.8M $2.86B +$52.3M $1,021.44 248
2019 Q1 2.81M $2.6B +$38.8M $925.48 242
2018 Q4 2.77M $2.37B -$10.9M $857.69 241
2018 Q3 2.77M $2.6B -$16.8M $935.86 237
2018 Q2 2.82M $2.56B -$300M $906.61 226
2018 Q1 3.19M $2.62B +$51.1M $822.52 226
2017 Q4 3.12M $2.65B +$4.19M $851.28 213
2017 Q3 3.1M $2.66B -$625M $857.00 192
2017 Q2 3.83M $3.33B +$2.47M $868.63 203
2017 Q1 3.83M $3.37B +$214M $879.88 198
2016 Q4 3.76M $3.15B -$19.9M $836.05 201
2016 Q3 3.75M $3.11B -$324M $830.00 185
2016 Q2 4.16M $3.5B -$388M $842.00 195
2016 Q1 4.6M $3.69B -$156M $802.60 189
2015 Q4 4.83M $3.51B -$59.4M $726.81 190
2015 Q3 4.91M $3.67B -$62.2M $747.30 179
2015 Q2 5M $3.27B +$5.29M $654.94 167
2015 Q1 5.03M $3.44B +$9.59M $684.52 171
2014 Q4 5.02M $3.17B -$33.9M $630.11 176
2014 Q3 5.07M $3.2B -$67.7M $630.07 163
2014 Q2 5.16M $3.14B +$20.8M $608.44 176
2014 Q1 5.12M $3.07B -$2.94M $599.90 180