William Blair & Company
IWO icon

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

William Blair & Company’s Portfolio IWO Stock Details IWO Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$12.3M Buy
39,343
+1,699
+5% +$565K 0.04% 311
2025
Q4 		$12.2M Sell
37,644
-1,511
-4% -$491K 0.03% 322
2025
Q3 		$12.5M Buy
39,155
+572
+1% +$173K 0.03% 309
2025
Q2 		$11M Buy
38,583
+438
+1% +$115K 0.03% 330
2025
Q1 		$9.75M Sell
38,145
-126
-0.3% -$35.6K 0.03% 333
2024
Q4 		$11M Sell
38,271
-689
-2% -$204K 0.03% 321
2024
Q3 		$11.1M Sell
38,960
-407
-1% -$111K 0.03% 331
2024
Q2 		$10.3M Buy
39,367
+7,201
+22% +$1.87M 0.03% 320
2024
Q1 		$8.71M Sell
32,166
-6,265
-16% -$1.6M 0.03% 354
2023
Q4 		$9.69M Buy
38,431
+5,638
+17% +$1.27M 0.03% 326
2023
Q3 		$7.35M Buy
32,793
+1,670
+5% +$400K 0.03% 358
2023
Q2 		$7.55M Sell
31,123
-173
-0.6% -$39.7K 0.03% 360
2023
Q1 		$7.1M Sell
31,296
-1,190
-4% -$272K 0.03% 365
2022
Q4 		$6.97M Buy
32,486
+206
+0.6% +$45.1K 0.03% 359
2022
Q3 		$6.67M Sell
32,280
-630
-2% -$142K 0.03% 359
2022
Q2 		$6.79M Sell
32,910
-1,021
-3% -$228K 0.03% 354
2022
Q1 		$8.68M Buy
33,931
+871
+3% +$223K 0.03% 349
2021
Q4 		$9.69M Buy
33,060
+191
+0.6% +$57.6K 0.03% 345
2021
Q3 		$9.65M Buy
32,869
+629
+2% +$189K 0.03% 333
2021
Q2 		$10M Sell
32,240
-302
-0.9% -$90.9K 0.03% 327
2021
Q1 		$9.79M Sell
32,542
-3,045
-9% -$945K 0.04% 322
2020
Q4 		$10.2M Buy
35,587
+3,765
+12% +$960K 0.04% 300
2020
Q3 		$7.05M Sell
31,822
-1,294
-4% -$283K 0.03% 332
2020
Q2 		$6.85M Buy
33,116
+3,360
+11% +$628K 0.03% 321
2020
Q1 		$4.71M Buy
29,756
+1,851
+7% +$367K 0.03% 347
2019
Q4 		$5.98M Buy
27,905
+103
+0.4% +$20.9K 0.03% 360
2019
Q3 		$5.36M Sell
27,802
-338
-1% -$67K 0.03% 359
2019
Q2 		$5.65M Buy
28,140
+5,297
+23% +$1.05M 0.03% 354
2019
Q1 		$4.49M Buy
22,843
+3,062
+15% +$583K 0.03% 391
2018
Q4 		$3.32M Buy
19,781
+1,533
+8% +$286K 0.02% 414
2018
Q3 		$3.92M Buy
18,248
+537
+3% +$114K 0.02% 423
2018
Q2 		$3.62M Buy
17,711
+1,827
+12% +$365K 0.02% 424
2018
Q1 		$3.03M Sell
15,884
-2,818
-15% -$541K 0.02% 466
2017
Q4 		$3.49M Sell
18,702
-2,403
-11% -$439K 0.02% 438
2017
Q3 		$3.78M Buy
21,105
+766
+4% +$130K 0.03% 403
2017
Q2 		$3.43M Buy
20,339
+1,871
+10% +$308K 0.03% 428
2017
Q1 		$2.97M Buy
18,468
+4,246
+30% +$674K 0.02% 444
2016
Q4 		$2.19M Buy
14,222
+4,982
+54% +$744K 0.02% 476
2016
Q3 		$1.38M Buy
9,240
+395
+4% +$57.6K 0.01% 574
2016
Q2 		$1.21M Sell
8,845
-2,442
-22% -$330K 0.01% 583
2016
Q1 		$1.5M Sell
11,287
-423
-4% -$52.8K 0.01% 520
2015
Q4 		$1.63M Buy
11,710
+501
+4% +$71.1K 0.02% 514
2015
Q3 		$1.5M Sell
11,209
-50,010
-82% -$7.41M 0.01% 618
2015
Q2 		$9.46M Sell
61,219
-101,836
-62% -$15.6M 0.01% 900
2015
Q1 		$24.7M Buy
163,055
+120,092
+280% +$17.5M 0.04% 513
2014
Q4 		$6.12M Sell
42,963
-151,253
-78% -$20.5M 0.01% 994
2014
Q3 		$25.2M Buy
194,216
+58,622
+43% +$7.86M 0.04% 492
2014
Q2 		$18.8M Buy
135,594
+111,194
+456% +$14.6M 0.03% 590
2014
Q1 		$3.32M Buy
24,400
+7,233
+42% +$989K 0.01% 1062
2013
Q4 		$2.33M Sell
17,167
-7,653
-31% -$992K ﹤0.01% 1133
2013
Q3 		$3.12M Buy
24,820
+2,345
+10% +$283K 0.01% 1007
2013
Q2 		$2.51M Buy
+22,475
New +$2.45M 0.01% 1016

Other funds holding IWO

Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
B
Barings Charlotte, North Carolina $6.19B AUM 16.5% 1-Year Est. Return
Envestnet Asset Management
Envestnet Asset Management Chicago, Illinois $374B AUM 17.66% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
CCWM
Cassaday & Co Wealth Management Mclean, Virginia $4.69B AUM 20.56% 1-Year Est. Return
Wells Fargo
Wells Fargo San Francisco, California $530B AUM 22.01% 1-Year Est. Return
PNC Financial Services Group
PNC Financial Services Group Pittsburgh, Pennsylvania $173B AUM 20.72% 1-Year Est. Return
LPL Financial
LPL Financial San Diego, California $377B AUM 19.32% 1-Year Est. Return
TCIIS
TIAA-CREF Individual & Institutional Services New York $26B AUM

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

William Blair & Company increased its iShares Russell 2000 Growth ETF (IWO) stake by 4.5% in Q1 2026, buying an estimated $565K and bringing the position to 39,343 shares worth $12.3M. The position accounts for 0.04% of the portfolio, ranked #311.

William Blair & Company first reported a position in IWO in Q2 2013 and has held it in 52 quarters since. The position peaked at $25.2M in Q3 2014. 1,021 funds tracked by Wall St. Rank hold IWO as of Q1 2026.

  • William Blair & Company held 39,343 shares of iShares Russell 2000 Growth ETF worth $12.3M as of Q1 2026.
  • William Blair & Company bought 1,699 iShares Russell 2000 Growth ETF shares in Q1 2026, an estimated $565K.
  • iShares Russell 2000 Growth ETF made up 0.04% of William Blair & Company's portfolio in Q1 2026, its #311 holding.
  • William Blair & Company first reported a position in iShares Russell 2000 Growth ETF in Q2 2013 and has held it in 52 quarters since.
  • William Blair & Company's iShares Russell 2000 Growth ETF position peaked at $25.2M in Q3 2014.
  • 1,021 funds tracked by Wall St. Rank held iShares Russell 2000 Growth ETF as of Q1 2026.

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