William Blair & Company
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William Blair & Company’s W.R. Berkley WRB Stock Holding History

William Blair & Company’s Portfolio WRB Stock Details WRB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$1.02M Buy
14,522
+2,479
+21% +$166K ﹤0.01% 973
2026
Q1 		$798K Buy
12,043
+872
+8% +$60.1K ﹤0.01% 1012
2025
Q4 		$783K Buy
11,171
+1,676
+18% +$124K ﹤0.01% 1000
2025
Q3 		$728K Buy
9,495
+86
+0.9% +$6.12K ﹤0.01% 999
2025
Q2 		$691K Buy
9,409
+319
+4% +$22.9K ﹤0.01% 994
2025
Q1 		$647K Hold
9,090
– – ﹤0.01% 1013
2024
Q4 		$532K Sell
9,090
-402
-4% -$24.1K ﹤0.01% 1081
2024
Q3 		$538K Buy
9,492
+9
+0.1% +$505 ﹤0.01% 1097
2024
Q2 		$497K Buy
9,483
+2,667
+39% +$143K ﹤0.01% 1104
2024
Q1 		$402K Sell
6,816
-60
-0.9% -$3.25K ﹤0.01% 1144
2023
Q4 		$324K Buy
6,876
+87
+1% +$3.97K ﹤0.01% 1222
2023
Q3 		$287K Sell
6,789
-1,046
-13% -$43.3K ﹤0.01% 1253
2023
Q2 		$311K Buy
7,835
+342
+5% +$13.4K ﹤0.01% 1237
2023
Q1 		$311K Sell
7,493
-331
-4% -$14.8K ﹤0.01% 1227
2022
Q4 		$378K Sell
7,824
-1,578
-17% -$76.1K ﹤0.01% 1134
2022
Q3 		$405K Buy
9,402
+48
+0.5% +$2.08K ﹤0.01% 1116
2022
Q2 		$426K Buy
9,354
+391
+4% +$17.8K ﹤0.01% 1122
2022
Q1 		$398K Sell
8,963
-1,349
-13% -$53.8K ﹤0.01% 1247
2021
Q4 		$378K Buy
10,312
+596
+6% +$21.1K ﹤0.01% 1321
2021
Q3 		$316K Sell
9,716
-544
-5% -$17.9K ﹤0.01% 1328
2021
Q2 		$339K Buy
10,260
+2,484
+32% +$86K ﹤0.01% 1302
2021
Q1 		$260K Sell
7,776
-594
-7% -$18.3K ﹤0.01% 1389
2020
Q4 		$247K Hold
8,370
– – ﹤0.01% 1347
2020
Q3 		$227K Buy
+8,370
New +$229K ﹤0.01% 1252
2019
Q3 		– Sell
-7,493
Closed -$249K – 1764
2019
Q2 		$249K Buy
+7,493
New +$205K ﹤0.01% 1223
2015
Q4 		– Sell
-27,439
Closed -$441K – 1279
2015
Q3 		$441K Buy
+27,439
New +$450K ﹤0.01% 1014

Other funds holding WRB

MSI
Mitsui Sumitomo Insurance Tokyo, Japan $4.15B AUM
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Kayne Anderson Rudnick Investment Management
Kayne Anderson Rudnick Investment Management Los Angeles, California $32.2B AUM 10.98% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

William Blair & Company's WRB Position: Q2 2026 in Review

William Blair & Company increased its W.R. Berkley (WRB) stake by 21% in Q2 2026, buying an estimated $166K and bringing the position to 14,522 shares worth $1.02M. The position accounts for ﹤0.01% of the portfolio, ranked #973.

William Blair & Company first reported a position in WRB in Q3 2015 and has held it in 26 quarters since. 952 funds tracked by Wall St. Rank hold WRB as of Q2 2026.

  • William Blair & Company held 14,522 shares of W.R. Berkley worth $1.02M as of Q2 2026.
  • William Blair & Company bought 2,479 W.R. Berkley shares in Q2 2026, an estimated $166K.
  • W.R. Berkley made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #973 holding.
  • William Blair & Company first reported a position in W.R. Berkley in Q3 2015 and has held it in 26 quarters since.
  • 952 funds tracked by Wall St. Rank held W.R. Berkley as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.