William Blair & Company’s iShares Russell 2000 ETF IWM Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2026
Q1
$156M Buy
628,228
+69,490
+12% +$17.9M 0.45% 51
2025
Q4
$138M Buy
558,738
+58,277
+12% +$14.3M 0.37% 61
2025
Q3
$121M Buy
500,461
+6,881
+1% +$1.58M 0.32% 75
2025
Q2
$107M Sell
493,580
-24,873
-5% -$5.01M 0.3% 81
2025
Q1
$103M Sell
518,453
-11,355
-2% -$2.46M 0.31% 84
2024
Q4
$117M Buy
529,808
+35,522
+7% +$8.1M 0.34% 71
2024
Q3
$109M Buy
494,286
+46,881
+10% +$10M 0.32% 77
2024
Q2
$90.8M Buy
447,405
+12,066
+3% +$2.44M 0.28% 86
2024
Q1
$91.6M Buy
435,339
+19,661
+5% +$3.92M 0.29% 86
2023
Q4
$83.4M Buy
415,678
+47,531
+13% +$8.52M 0.28% 84
2023
Q3
$65.1M Buy
368,147
+30,429
+9% +$5.71M 0.25% 97
2023
Q2
$63.2M Buy
337,718
+35,057
+12% +$6.25M 0.23% 98
2023
Q1
$54M Buy
302,661
+25,557
+9% +$4.71M 0.22% 107
2022
Q4
$48.3M Buy
277,104
+6,528
+2% +$1.16M 0.21% 108
2022
Q3
$44.6M Buy
270,576
+1,031
+0.4% +$188K 0.2% 108
2022
Q2
$45.6M Sell
269,545
-23,808
-8% -$4.39M 0.2% 112
2022
Q1
$60.2M Sell
293,353
-3,572
-1% -$729K 0.21% 110
2021
Q4
$66.1M Buy
296,925
+73,808
+33% +$16.7M 0.21% 112
2021
Q3
$48.8M Buy
223,117
+1,281
+0.6% +$284K 0.17% 135
2021
Q2
$50.9M Buy
221,836
+7,649
+4% +$1.72M 0.18% 127
2021
Q1
$47.3M Sell
214,187
-5,887
-3% -$1.29M 0.18% 130
2020
Q4
$43.1M Buy
220,074
+12,569
+6% +$2.2M 0.16% 134
2020
Q3
$31.1M Buy
207,505
+37,278
+22% +$5.61M 0.13% 150
2020
Q2
$24.4M Buy
170,227
+20,239
+13% +$2.66M 0.12% 159
2020
Q1
$17.2M Sell
149,988
-44,902
-23% -$6.69M 0.11% 171
2019
Q4
$32.3M Buy
194,890
+8,000
+4% +$1.26M 0.17% 135
2019
Q3
$28.3M Buy
186,890
+1,984
+1% +$303K 0.16% 134
2019
Q2
$28.8M Buy
184,906
+3,812
+2% +$588K 0.16% 132
2019
Q1
$27.7M Buy
181,094
+11,249
+7% +$1.69M 0.17% 128
2018
Q4
$22.7M Buy
169,845
+7,311
+4% +$1.09M 0.17% 132
2018
Q3
$27.4M Buy
162,534
+7,426
+5% +$1.25M 0.17% 137
2018
Q2
$25.4M Buy
155,108
+16,334
+12% +$2.61M 0.17% 128
2018
Q1
$21.1M Sell
138,774
-2,542
-2% -$393K 0.15% 143
2017
Q4
$21.5M Buy
141,316
+1,797
+1% +$270K 0.15% 149
2017
Q3
$20.7M Buy
139,519
+5,880
+4% +$827K 0.16% 148
2017
Q2
$18.8M Sell
133,639
-3,495
-3% -$484K 0.14% 164
2017
Q1
$18.9M Buy
137,134
+8,910
+7% +$1.22M 0.15% 154
2016
Q4
$17.3M Buy
128,224
+16,630
+15% +$2.13M 0.15% 160
2016
Q3
$13.9M Sell
111,594
-65
-0.1% -$7.9K 0.12% 188
2016
Q2
$12.8M Buy
111,659
+16,308
+17% +$1.84M 0.12% 186
2016
Q1
$10.5M Buy
95,351
+4,151
+5% +$430K 0.1% 191
2015
Q4
$10.3M Buy
91,200
+23,053
+34% +$2.66M 0.1% 202
2015
Q3
$7.44M Sell
68,147
-39,616
-37% -$4.7M 0.06% 261
2015
Q2
$13.5M Buy
107,763
+576
+0.5% +$72K 0.02% 792
2015
Q1
$13.3M Sell
107,187
-3,104
-3% -$374K 0.02% 763
2014
Q4
$13.2M Buy
110,291
+4,687
+4% +$536K 0.02% 751
2014
Q3
$11.5M Sell
105,604
-336
-0.3% -$38.4K 0.02% 788
2014
Q2
$12.6M Buy
105,940
+1,771
+2% +$201K 0.02% 778
2014
Q1
$12.1M Sell
104,169
-13,936
-12% -$1.61M 0.02% 761
2013
Q4
$13.6M Buy
118,105
+27,019
+30% +$2.98M 0.02% 687
2013
Q3
$9.71M Sell
91,086
-6,131
-6% -$634K 0.02% 751
2013
Q2
$9.43M Buy
+97,217
New +$9.28M 0.02% 744

Other funds holding IWM

William Blair & Company's IWM Position: Q1 2026 in Review

William Blair & Company increased its iShares Russell 2000 ETF (IWM) stake by 12% in Q1 2026, buying an estimated $17.9M and bringing the position to 628,228 shares worth $156M. The position accounts for 0.45% of the portfolio, ranked #51.

William Blair & Company first reported a position in IWM in Q2 2013 and has held it in 52 quarters since. 2,568 funds tracked by Wall St. Rank hold IWM as of Q1 2026.

  • William Blair & Company held 628,228 shares of iShares Russell 2000 ETF worth $156M as of Q1 2026.
  • William Blair & Company bought 69,490 iShares Russell 2000 ETF shares in Q1 2026, an estimated $17.9M.
  • iShares Russell 2000 ETF made up 0.45% of William Blair & Company's portfolio in Q1 2026, its #51 holding.
  • William Blair & Company first reported a position in iShares Russell 2000 ETF in Q2 2013 and has held it in 52 quarters since.
  • 2,568 funds tracked by Wall St. Rank held iShares Russell 2000 ETF as of Q1 2026.

Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.