William Blair Investment Management’s iShares Russell 1000 Growth ETF IWF Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q2 | $200K | Sell |
1,608
-336,092
| -100% | -$40.5M | ﹤0.01% | 403 |
|
|
2026
Q1 | $36M | Sell |
337,700
-107,656
| -24% | -$12.2M | 0.12% | 163 |
|
|
2025
Q4 | $52.7M | Sell |
445,356
-231,132
| -34% | -$27.4M | 0.15% | 135 |
|
|
2025
Q3 | $79.2M | Buy |
+676,488
| New | +$75.3M | 0.2% | 121 |
|
|
2025
Q2 | – | Sell |
-162,400
| Closed | -$14.7M | – | 440 |
|
|
2025
Q1 | $14.7M | Buy |
+162,400
| New | +$16M | 0.04% | 315 |
|
|
2024
Q3 | – | Sell |
-300,860
| Closed | -$27.4M | – | 430 |
|
|
2024
Q2 | $27.4M | Buy |
+300,860
| New | +$25.7M | 0.07% | 246 |
|
|
2024
Q1 | – | Sell |
-556
| Closed | -$42.1K | – | 420 |
|
|
2023
Q4 | $42.1K | Buy |
+556
| New | +$39.3K | ﹤0.01% | 406 |
|
|
2023
Q1 | – | Sell |
-3,060
| Closed | -$164K | – | 410 |
|
|
2022
Q4 | $164K | Buy |
3,060
+2,400
| +364% | +$132K | ﹤0.01% | 399 |
|
|
2022
Q3 | $35K | Sell |
660
-124
| -16% | -$7.29K | ﹤0.01% | 387 |
|
|
2022
Q2 | $0 | Sell |
784
-1,684
| -68% | -$101K | ﹤0.01% | 426 |
|
|
2022
Q1 | $0 | Buy |
+2,468
| New | +$168K | ﹤0.01% | 447 |
|
|
2021
Q4 | – | Sell |
-58,000
| Closed | -$3.97M | – | 441 |
|
|
2021
Q3 | $3.97M | Buy |
+58,000
| New | +$4.1M | 0.01% | 371 |
|
|
2021
Q1 | – | Sell |
-332
| Closed | -$20K | – | 376 |
|
|
2020
Q4 | $20K | Buy |
+332
| New | +$18.9K | ﹤0.01% | 356 |
|
|
2020
Q1 | – | Sell |
-860
| Closed | – | – | 364 |
|
|
2019
Q4 | $0 | Buy |
+860
| New | +$35.9K | ﹤0.01% | 367 |
|
|
2019
Q3 | – | Sell |
-2,920
| Closed | -$115K | – | 376 |
|
|
2019
Q2 | $115K | Buy |
+2,920
| New | +$113K | ﹤0.01% | 369 |
|
|
2019
Q1 | – | Sell |
-5,580
| Closed | -$183K | – | 418 |
|
|
2018
Q4 | $183K | Buy |
+5,580
| New | +$197K | ﹤0.01% | 401 |
|
|
2018
Q2 | – | Sell |
-2,247,720
| Closed | -$76.5M | – | 489 |
|
|
2018
Q1 | $76.5M | Sell |
2,247,720
-70,800
| -3% | -$2.48M | 0.29% | 104 |
|
|
2017
Q4 | $78.1M | Sell |
2,318,520
-145,080
| -6% | -$4.75M | 0.3% | 106 |
|
|
2017
Q3 | $77M | Sell |
2,463,600
-175,200
| -7% | -$5.36M | 0.28% | 115 |
|
|
2017
Q2 | $78.5M | Sell |
2,638,800
-135,200
| -5% | -$3.97M | 0.29% | 110 |
|
|
2017
Q1 | $78.9M | Sell |
2,774,000
-299,964
| -10% | -$8.32M | 0.3% | 108 |
|
|
2016
Q4 | $80.6M | Buy |
3,073,964
+1,399,964
| +84% | +$36.3M | 0.32% | 106 |
|
|
2016
Q3 | $43.6M | Sell |
1,674,000
-106,800
| -6% | -$2.78M | 0.17% | 161 |
|
|
2016
Q2 | $44.7M | Sell |
1,780,800
-52,800
| -3% | -$1.32M | 0.18% | 147 |
|
|
2016
Q1 | $45.7M | Buy |
1,833,600
+80,192
| +5% | +$1.89M | 0.18% | 142 |
|
|
2015
Q4 | $43.6M | Buy |
1,753,408
+83,008
| +5% | +$2.07M | 0.18% | 144 |
|
|
2015
Q3 | $38.8M | Buy |
+1,670,400
| New | +$41.1M | 0.08% | 341 |
|
Other funds holding IWF
William Blair Investment Management's IWF Position: Q2 2026 in Review
William Blair Investment Management reduced its iShares Russell 1000 Growth ETF (IWF) stake by 100% in Q2 2026, selling an estimated $40.5M and leaving 1,608 shares worth $200K. The position accounts for ﹤0.01% of the portfolio, ranked #403.
William Blair Investment Management first reported a position in IWF in Q3 2015 and has held it in 27 quarters since. The position peaked at $80.6M in Q4 2016. 2,504 funds tracked by Wall St. Rank hold IWF as of Q2 2026.
- William Blair Investment Management held 1,608 shares of iShares Russell 1000 Growth ETF worth $200K as of Q2 2026.
- William Blair Investment Management sold 336,092 iShares Russell 1000 Growth ETF shares in Q2 2026, an estimated $40.5M.
- iShares Russell 1000 Growth ETF made up ﹤0.01% of William Blair Investment Management's portfolio in Q2 2026, its #403 holding.
- William Blair Investment Management first reported a position in iShares Russell 1000 Growth ETF in Q3 2015 and has held it in 27 quarters since.
- William Blair Investment Management's iShares Russell 1000 Growth ETF position peaked at $80.6M in Q4 2016.
- 2,504 funds tracked by Wall St. Rank held iShares Russell 1000 Growth ETF as of Q2 2026.
Based on William Blair Investment Management's 13F filing for Q2 2026, filed 12 Aug 2026.