William Blair & Company’s iShares S&P 100 ETF OEF Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $6.98M | Sell |
21,931
-259
| -1% | -$86.8K | 0.02% | 426 |
|
|
2025
Q4 | $7.61M | Sell |
22,190
-269
| -1% | -$91.4K | 0.02% | 422 |
|
|
2025
Q3 | $7.48M | Buy |
22,459
+478
| +2% | +$152K | 0.02% | 428 |
|
|
2025
Q2 | $6.69M | Sell |
21,981
-71
| -0.3% | -$19.8K | 0.02% | 429 |
|
|
2025
Q1 | $5.97M | Buy |
22,052
+563
| +3% | +$162K | 0.02% | 437 |
|
|
2024
Q4 | $6.21M | Buy |
21,489
+464
| +2% | +$133K | 0.02% | 441 |
|
|
2024
Q3 | $5.82M | Sell |
21,025
-222
| -1% | -$59.3K | 0.02% | 460 |
|
|
2024
Q2 | $5.62M | Buy |
21,247
+1,008
| +5% | +$252K | 0.02% | 457 |
|
|
2024
Q1 | $5.01M | Sell |
20,239
-281
| -1% | -$66.3K | 0.02% | 480 |
|
|
2023
Q4 | $4.58M | Buy |
20,520
+553
| +3% | +$116K | 0.02% | 476 |
|
|
2023
Q3 | $4.01M | Sell |
19,967
-118
| -0.6% | -$24.6K | 0.02% | 487 |
|
|
2023
Q2 | $4.16M | Sell |
20,085
-128
| -0.6% | -$24.9K | 0.02% | 485 |
|
|
2023
Q1 | $3.78M | Buy |
20,213
+5,396
| +36% | +$968K | 0.02% | 502 |
|
|
2022
Q4 | $2.53M | Buy |
14,817
+17
| +0.1% | +$2.94K | 0.01% | 572 |
|
|
2022
Q3 | $2.4M | Sell |
14,800
-432
| -3% | -$78.4K | 0.01% | 570 |
|
|
2022
Q2 | $2.63M | Buy |
15,232
+4,063
| +36% | +$759K | 0.01% | 568 |
|
|
2022
Q1 | $2.33M | Hold |
11,169
| – | – | 0.01% | 664 |
|
|
2021
Q4 | $2.45M | Sell |
11,169
-309
| -3% | -$65.5K | 0.01% | 670 |
|
|
2021
Q3 | $2.27M | Sell |
11,478
-884
| -7% | -$180K | 0.01% | 673 |
|
|
2021
Q2 | $2.42M | Sell |
12,362
-397
| -3% | -$75.4K | 0.01% | 651 |
|
|
2021
Q1 | $2.29M | Sell |
12,759
-9,835
| -44% | -$1.73M | 0.01% | 654 |
|
|
2020
Q4 | $3.88M | Buy |
22,594
+12,710
| +129% | +$2.08M | 0.01% | 485 |
|
|
2020
Q3 | $1.54M | Sell |
9,884
-200
| -2% | -$30.8K | 0.01% | 652 |
|
|
2020
Q2 | $1.44M | Buy |
10,084
+4,892
| +94% | +$658K | 0.01% | 635 |
|
|
2020
Q1 | $616K | Buy |
5,192
+2,218
| +75% | +$306K | ﹤0.01% | 810 |
|
|
2019
Q4 | $429K | Hold |
2,974
| – | – | ﹤0.01% | 1043 |
|
|
2019
Q3 | $391K | Hold |
2,974
| – | – | ﹤0.01% | 1026 |
|
|
2019
Q2 | $385K | Buy |
2,974
+100
| +3% | +$12.8K | ﹤0.01% | 1066 |
|
|
2019
Q1 | $360K | Hold |
2,874
| – | – | ﹤0.01% | 1082 |
|
|
2018
Q4 | $321K | Buy |
2,874
+2,224
| +342% | +$268K | ﹤0.01% | 1066 |
|
|
2018
Q3 | $84K | Hold |
650
| – | – | ﹤0.01% | 1398 |
|
|
2018
Q2 | $78K | Hold |
650
| – | – | ﹤0.01% | 1367 |
|
|
2018
Q1 | $75K | Buy |
+650
| New | +$78.8K | ﹤0.01% | 1301 |
|
|
2017
Q1 | – | Sell |
-2,400
| Closed | -$238K | – | 1495 |
|
|
2016
Q4 | $238K | Sell |
2,400
-125
| -5% | -$12.1K | ﹤0.01% | 1093 |
|
|
2016
Q3 | $242K | Hold |
2,525
| – | – | ﹤0.01% | 1095 |
|
|
2016
Q2 | $235K | Buy |
2,525
+25
| +1% | +$2.31K | ﹤0.01% | 1067 |
|
|
2016
Q1 | $228K | Buy |
2,500
+100
| +4% | +$8.72K | ﹤0.01% | 1027 |
|
|
2015
Q4 | $218K | Buy |
+2,400
| New | +$220K | ﹤0.01% | 1061 |
|
Other funds holding OEF
William Blair & Company's OEF Position: Q1 2026 in Review
William Blair & Company reduced its iShares S&P 100 ETF (OEF) stake by 1.2% in Q1 2026, selling an estimated $86.8K and leaving 21,931 shares worth $6.98M. The position accounts for 0.02% of the portfolio, ranked #426.
William Blair & Company first reported a position in OEF in Q4 2015 and has held it in 38 quarters since. The position peaked at $7.61M in Q4 2025. 1,003 funds tracked by Wall St. Rank hold OEF as of Q1 2026.
- William Blair & Company held 21,931 shares of iShares S&P 100 ETF worth $6.98M as of Q1 2026.
- William Blair & Company sold 259 iShares S&P 100 ETF shares in Q1 2026, an estimated $86.8K.
- iShares S&P 100 ETF made up 0.02% of William Blair & Company's portfolio in Q1 2026, its #426 holding.
- William Blair & Company first reported a position in iShares S&P 100 ETF in Q4 2015 and has held it in 38 quarters since.
- William Blair & Company's iShares S&P 100 ETF position peaked at $7.61M in Q4 2025.
- 1,003 funds tracked by Wall St. Rank held iShares S&P 100 ETF as of Q1 2026.
Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.