William Blair & Company
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William Blair & Company’s iShares US Basic Materials ETF IYM Stock Holding History

William Blair & Company’s Portfolio IYM Stock Details IYM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$779K Buy
4,426
+3,898
+738% +$682K ﹤0.01% 1019
2025
Q4 		$81.3K Hold
528
– – ﹤0.01% 1601
2025
Q3 		$78.2K Buy
528
+469
+795% +$68.5K ﹤0.01% 1594
2025
Q2 		$8.22K Hold
59
– – ﹤0.01% 1742
2025
Q1 		$7.89K Buy
59
+1
+2% +$136 ﹤0.01% 1729
2024
Q4 		$7.58K Sell
58
-405
-87% -$58.5K ﹤0.01% 1749
2024
Q3 		$69.5K Sell
463
-169
-27% -$24.1K ﹤0.01% 1587
2024
Q2 		$88.5K Buy
632
+405
+178% +$58.2K ﹤0.01% 1526
2024
Q1 		$33.5K Buy
227
+12
+6% +$1.65K ﹤0.01% 1643
2023
Q4 		$29.7K Buy
215
+11
+5% +$1.41K ﹤0.01% 1633
2023
Q3 		$25.7K Buy
204
+121
+146% +$16K ﹤0.01% 1659
2023
Q2 		$11K Sell
83
-765
-90% -$98.6K ﹤0.01% 1728
2023
Q1 		$112K Buy
848
+1
+0.1% +$133 ﹤0.01% 1485
2022
Q4 		$106K Hold
847
– – ﹤0.01% 1480
2022
Q3 		$92K Buy
847
+331
+64% +$39.7K ﹤0.01% 1519
2022
Q2 		$61K Buy
516
+1
+0.2% +$138 ﹤0.01% 1602
2022
Q1 		$77K Buy
515
+275
+115% +$38K ﹤0.01% 1659
2021
Q4 		$34K Hold
240
– – ﹤0.01% 1807
2021
Q3 		$30K Hold
240
– – ﹤0.01% 1735
2021
Q2 		$31K Buy
240
+1
+0.4% +$134 ﹤0.01% 1743
2021
Q1 		$30K Hold
239
– – ﹤0.01% 1717
2020
Q4 		$27K Sell
239
-84
-26% -$8.95K ﹤0.01% 1680
2020
Q3 		$32K Buy
323
+100
+45% +$9.82K ﹤0.01% 1544
2020
Q2 		$20K Hold
223
– – ﹤0.01% 1535
2020
Q1 		$15K Sell
223
-17
-7% -$1.46K ﹤0.01% 1528
2019
Q4 		$24K Hold
240
– – ﹤0.01% 1560
2019
Q3 		$22K Hold
240
– – ﹤0.01% 1534
2019
Q2 		$23K Buy
240
+19
+9% +$1.75K ﹤0.01% 1571
2019
Q1 		$21K Sell
221
-191
-46% -$17.1K ﹤0.01% 1561
2018
Q4 		$35K Sell
412
-521
-56% -$46.6K ﹤0.01% 1432
2018
Q3 		$92K Buy
933
+371
+66% +$37.3K ﹤0.01% 1391
2018
Q2 		$56K Hold
562
– – ﹤0.01% 1404
2018
Q1 		$54K Buy
+562
New +$57.6K ﹤0.01% 1332

Other funds holding IYM

JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
Manulife (Manufacturers Life Insurance)
Manulife (Manufacturers Life Insurance) Canada, Ontario, Canada $116B AUM 26.37% 1-Year Est. Return
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
LPL Financial
LPL Financial San Diego, California $377B AUM 19.32% 1-Year Est. Return
CB
Commerce Bank Kansas City, Missouri $20.7B AUM 23.76% 1-Year Est. Return
AWM
AE Wealth Management Topeka, Kansas $18.5B AUM 19.51% 1-Year Est. Return
Wells Fargo
Wells Fargo San Francisco, California $530B AUM 22.01% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
DWP
Destiny Wealth Partners Tavares, Florida $914M AUM 18.14% 1-Year Est. Return

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

William Blair & Company increased its iShares US Basic Materials ETF (IYM) stake by 738% in Q1 2026, buying an estimated $682K and bringing the position to 4,426 shares worth $779K. The position accounts for ﹤0.01% of the portfolio, ranked #1019.

William Blair & Company first reported a position in IYM in Q1 2018 and has held it in 33 quarters since. 246 funds tracked by Wall St. Rank hold IYM as of Q1 2026.

  • William Blair & Company held 4,426 shares of iShares US Basic Materials ETF worth $779K as of Q1 2026.
  • William Blair & Company bought 3,898 iShares US Basic Materials ETF shares in Q1 2026, an estimated $682K.
  • iShares US Basic Materials ETF made up ﹤0.01% of William Blair & Company's portfolio in Q1 2026, its #1019 holding.
  • William Blair & Company first reported a position in iShares US Basic Materials ETF in Q1 2018 and has held it in 33 quarters since.
  • 246 funds tracked by Wall St. Rank held iShares US Basic Materials ETF as of Q1 2026.

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