BlackRock
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BlackRock’s White Mountains Insurance WTM Stock Holding History

BlackRock’s Portfolio WTM Stock Details WTM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$244M Buy
117,871
+4,543
+4% +$9.72M ﹤0.01% 1674
2026
Q1 		$249M Buy
113,328
+1,039
+0.9% +$2.22M ﹤0.01% 1536
2025
Q4 		$233M Sell
112,289
-290
-0.3% -$567K ﹤0.01% 1579
2025
Q3 		$188M Sell
112,579
-579
-0.5% -$1.03M ﹤0.01% 1695
2025
Q2 		$203M Sell
113,158
-3,641
-3% -$6.48M ﹤0.01% 1617
2025
Q1 		$225M Sell
116,799
-1,685
-1% -$3.17M ﹤0.01% 1529
2024
Q4 		$230M Buy
118,484
+3,361
+3% +$6.35M ﹤0.01% 1593
2024
Q3 		$195M Sell
115,123
-1,332
-1% -$2.32M ﹤0.01% 1673
2024
Q2 		$212M Buy
116,455
+1,482
+1% +$2.62M ﹤0.01% 1573
2024
Q1 		$206M Buy
114,973
+2,279
+2% +$3.82M ﹤0.01% 1625
2023
Q4 		$170M Buy
112,694
+1,259
+1% +$1.87M ﹤0.01% 1752
2023
Q3 		$167M Sell
111,435
-324
-0.3% -$497K ﹤0.01% 1660
2023
Q2 		$155M Buy
111,759
+227
+0.2% +$320K ﹤0.01% 1758
2023
Q1 		$154M Sell
111,532
-223
-0.2% -$320K ﹤0.01% 1738
2022
Q4 		$158M Sell
111,755
-3,479
-3% -$4.71M 0.01% 1695
2022
Q3 		$150M Sell
115,234
-3,842
-3% -$4.97M 0.01% 1690
2022
Q2 		$148M Sell
119,076
-278
-0.2% -$323K ﹤0.01% 1751
2022
Q1 		$136M Sell
119,354
-344
-0.3% -$360K ﹤0.01% 1936
2021
Q4 		$121M Sell
119,698
-4,982
-4% -$5.26M ﹤0.01% 2072
2021
Q3 		$133M Sell
124,680
-3,711
-3% -$4.14M ﹤0.01% 2021
2021
Q2 		$147M Sell
128,391
-13,096
-9% -$15.3M ﹤0.01% 1999
2021
Q1 		$158M Buy
141,487
+4,912
+4% +$5.49M ﹤0.01% 1881
2020
Q4 		$137M Buy
136,575
+3,832
+3% +$3.61M ﹤0.01% 1880
2020
Q3 		$103M Sell
132,743
-5,891
-4% -$5.09M ﹤0.01% 1861
2020
Q2 		$123M Sell
138,634
-16,606
-11% -$15M ﹤0.01% 1713
2020
Q1 		$141M Buy
155,240
+3,403
+2% +$3.52M 0.01% 1412
2019
Q4 		$169M Buy
151,837
+2,709
+2% +$2.95M 0.01% 1622
2019
Q3 		$161M Buy
149,128
+10,471
+8% +$11.2M 0.01% 1568
2019
Q2 		$142M Sell
138,657
-7,293
-5% -$7.02M 0.01% 1670
2019
Q1 		$135M Buy
145,950
+1,959
+1% +$1.77M 0.01% 1688
2018
Q4 		$124M Buy
143,991
+5,877
+4% +$5.24M 0.01% 1654
2018
Q3 		$129M Buy
138,114
+5,251
+4% +$4.87M 0.01% 1787
2018
Q2 		$120M Sell
132,863
-18,821
-12% -$16.6M 0.01% 1825
2018
Q1 		$125M Sell
151,684
-2,310
-2% -$1.91M 0.01% 1688
2017
Q4 		$131M Sell
153,994
-12,405
-7% -$10.8M 0.01% 1678
2017
Q3 		$143M Sell
166,399
-17,921
-10% -$15.4M 0.01% 1603
2017
Q2 		$160M Sell
184,320
-3,185
-2% -$2.76M 0.01% 1460
2017
Q1 		$165M Buy
187,505
+185,513
+9,313% +$166M 0.01% 1439
2016
Q4 		$1.67M Sell
1,992
-230
-10% -$193K ﹤0.01% 1305
2016
Q3 		$1.84M Buy
2,222
+135
+6% +$111K ﹤0.01% 1245
2016
Q2 		$1.76M Buy
2,087
+1,428
+217% +$1.17M ﹤0.01% 1218
2016
Q1 		$528K Buy
659
+562
+579% +$420K ﹤0.01% 1546
2015
Q4 		$71K Sell
97
-13
-12% -$9.96K ﹤0.01% 1888
2015
Q3 		$82K Sell
110
-25
-19% -$18K ﹤0.01% 1773
2015
Q2 		$88K Sell
135
-3
-2% -$1.99K ﹤0.01% 1828
2015
Q1 		$94K Sell
138
-184
-57% -$121K ﹤0.01% 1792
2014
Q4 		$203K Buy
322
+72
+29% +$45.8K ﹤0.01% 1518
2014
Q3 		$158K Sell
250
-318
-56% -$198K ﹤0.01% 1586
2014
Q2 		$346K Sell
568
-3,733
-87% -$2.22M ﹤0.01% 1391
2014
Q1 		$2.58M Sell
4,301
-43
-1% -$25.1K ﹤0.01% 999
2013
Q4 		$2.62M Sell
4,344
-6
-0.1% -$3.54K ﹤0.01% 966
2013
Q3 		$2.47M Buy
4,350
+1,594
+58% +$926K ﹤0.01% 921
2013
Q2 		$1.58M Buy
+2,756
New +$1.61M ﹤0.01% 974

Other funds holding WTM

Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Neuberger Berman Group
Neuberger Berman Group New York $150B AUM 40.08% 1-Year Est. Return
RRAM
River Road Asset Management Louisville, Kentucky $8.99B AUM 12.83% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management San Mateo, California $36.7B AUM 74.15% 1-Year Est. Return
CB
Cooke & Bieler Philadelphia, Pennsylvania $8.65B AUM 9.66% 1-Year Est. Return
WCM
Wallace Capital Management Dallas, Texas $912M AUM 21.45% 1-Year Est. Return
FMI
Fiduciary Management Inc Milwaukee, Wisconsin $7.03B AUM 11.68% 1-Year Est. Return
GJL
Gendell Jeffrey L $11.3B AUM 163.05% 1-Year Est. Return

BlackRock's WTM Position: Q2 2026 in Review

BlackRock increased its White Mountains Insurance (WTM) stake by 4% in Q2 2026, buying an estimated $9.72M and bringing the position to 117,871 shares worth $244M. The position accounts for ﹤0.01% of the portfolio, ranked #1674.

BlackRock first reported a position in WTM in Q2 2013 and has held it in 53 quarters since. The position peaked at $249M in Q1 2026. 356 funds tracked by Wall St. Rank hold WTM as of Q2 2026.

  • BlackRock held 117,871 shares of White Mountains Insurance worth $244M as of Q2 2026.
  • BlackRock bought 4,543 White Mountains Insurance shares in Q2 2026, an estimated $9.72M.
  • White Mountains Insurance made up ﹤0.01% of BlackRock's portfolio in Q2 2026, its #1674 holding.
  • BlackRock first reported a position in White Mountains Insurance in Q2 2013 and has held it in 53 quarters since.
  • BlackRock's White Mountains Insurance position peaked at $249M in Q1 2026.
  • 356 funds tracked by Wall St. Rank held White Mountains Insurance as of Q2 2026.

Based on BlackRock's 13F filing for Q2 2026, filed 7 Aug 2026.