Robeco Institutional Asset Management
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Robeco Institutional Asset Management’s White Mountains Insurance WTM Stock Holding History

Quarter Market Value Status Shares Shares
Change %
Trade Value Portfolio Weight Portfolio Position
2025
Q2
$32M Sell
17,822
-1,332
-7% -$2.39M 0.05% 280
2025
Q1
$36.9M Sell
19,154
-263
-1% -$506K 0.07% 238
2024
Q4
$37.8M Sell
19,417
-899
-4% -$1.75M 0.07% 231
2024
Q3
$34.5M Sell
20,316
-1,062
-5% -$1.8M 0.07% 254
2024
Q2
$38.9M Sell
21,378
-8,245
-28% -$15M 0.08% 217
2024
Q1
$53.2M Sell
29,623
-167
-0.6% -$300K 0.12% 180
2023
Q4
$44.8M Sell
29,790
-2,122
-7% -$3.19M 0.11% 201
2023
Q3
$47.7M Buy
31,912
+234
+0.7% +$350K 0.13% 179
2023
Q2
$44M Sell
31,678
-489
-2% -$679K 0.12% 192
2023
Q1
$44.3M Buy
32,167
+9,569
+42% +$13.2M 0.12% 188
2022
Q4
$32M Buy
22,598
+12,724
+129% +$18M 0.09% 227
2022
Q3
$12.9M Sell
9,874
-435
-4% -$567K 0.04% 347
2022
Q2
$12.8M Sell
10,309
-44
-0.4% -$54.8K 0.04% 362
2022
Q1
$11.8M Sell
10,353
-1,726
-14% -$1.96M 0.03% 428
2021
Q4
$12.2M Sell
12,079
-6,033
-33% -$6.12M 0.03% 431
2021
Q3
$19.4M Hold
18,112
0.04% 360
2021
Q2
$20.8M Sell
18,112
-4,309
-19% -$4.95M 0.05% 356
2021
Q1
$25M Sell
22,421
-4,342
-16% -$4.84M 0.06% 305
2020
Q4
$26.8M Sell
26,763
-4,992
-16% -$4.99M 0.07% 283
2020
Q3
$24.7M Sell
31,755
-6,463
-17% -$5.03M 0.08% 263
2020
Q2
$33.9M Sell
38,218
-1,851
-5% -$1.64M 0.12% 202
2020
Q1
$36.5M Hold
40,069
0.15% 184
2019
Q4
$44.7M Sell
40,069
-198
-0.5% -$221K 0.14% 196
2019
Q3
$43.5M Sell
40,267
-942
-2% -$1.02M 0.15% 180
2019
Q2
$42.1M Hold
41,209
0.15% 195
2019
Q1
$38.1M Buy
41,209
+11,810
+40% +$10.9M 0.14% 202
2018
Q4
$25.2M Buy
29,399
+13,843
+89% +$11.9M 0.11% 231
2018
Q3
$14.6M Buy
+15,556
New +$14.6M 0.06% 363