William Blair & Company
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William Blair & Company’s iShares Core 1-5 Year USD Bond ETF ISTB Stock Holding History

William Blair & Company’s Portfolio ISTB Stock Details ISTB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$534K Buy
11,072
+111
+1% +$5.36K ﹤0.01% 1207
2026
Q1 		$531K Sell
10,961
-366
-3% -$17.8K ﹤0.01% 1126
2025
Q4 		$552K Sell
11,327
-946
-8% -$46.2K ﹤0.01% 1111
2025
Q3 		$599K Sell
12,273
-412
-3% -$20K ﹤0.01% 1060
2025
Q2 		$617K Sell
12,685
-1,441
-10% -$69.5K ﹤0.01% 1030
2025
Q1 		$683K Sell
14,126
-535
-4% -$25.7K ﹤0.01% 994
2024
Q4 		$700K Sell
14,661
-687
-4% -$33K ﹤0.01% 997
2024
Q3 		$747K Buy
15,348
+260
+2% +$12.5K ﹤0.01% 994
2024
Q2 		$715K Sell
15,088
-1,718
-10% -$81K ﹤0.01% 980
2024
Q1 		$797K Sell
16,806
-363
-2% -$17.2K ﹤0.01% 941
2023
Q4 		$817K Buy
17,169
+462
+3% +$21.6K ﹤0.01% 923
2023
Q3 		$775K Sell
16,707
-561
-3% -$26.1K ﹤0.01% 918
2023
Q2 		$805K Sell
17,268
-400
-2% -$18.8K ﹤0.01% 913
2023
Q1 		$833K Buy
17,668
+138
+0.8% +$6.46K ﹤0.01% 885
2022
Q4 		$814K Sell
17,530
-2,130
-11% -$98.6K ﹤0.01% 895
2022
Q3 		$906K Hold
19,660
– – ﹤0.01% 850
2022
Q2 		$932K Buy
19,660
+801
+4% +$38.2K ﹤0.01% 868
2022
Q1 		$914K Sell
18,859
-3,406
-15% -$168K ﹤0.01% 955
2021
Q4 		$1.12M Buy
22,265
+68
+0.3% +$3.44K ﹤0.01% 911
2021
Q3 		$1.13M Buy
22,197
+2,093
+10% +$107K ﹤0.01% 882
2021
Q2 		$1.03M Hold
20,104
– – ﹤0.01% 908
2021
Q1 		$1.03M Hold
20,104
– – ﹤0.01% 884
2020
Q4 		$1.04M Sell
20,104
-416
-2% -$21.4K ﹤0.01% 836
2020
Q3 		$1.06M Hold
20,520
– – ﹤0.01% 739
2020
Q2 		$1.06M Buy
20,520
+1,772
+9% +$90.5K 0.01% 706
2020
Q1 		$947K Sell
18,748
-1,114
-6% -$56.2K 0.01% 681
2019
Q4 		$1M Sell
19,862
-12,528
-39% -$631K 0.01% 777
2019
Q3 		$1.64M Sell
32,390
-2,959
-8% -$149K 0.01% 628
2019
Q2 		$1.78M Buy
35,349
+16,508
+88% +$824K 0.01% 605
2019
Q1 		$939K Sell
18,841
-12,064
-39% -$596K 0.01% 750
2018
Q4 		$1.52M Sell
30,905
-3,427
-10% -$167K 0.01% 591
2018
Q3 		$1.68M Sell
34,332
-4,952
-13% -$243K 0.01% 601
2018
Q2 		$1.93M Buy
39,284
+4,322
+12% +$212K 0.01% 561
2018
Q1 		$1.73M Buy
+34,962
New +$1.73M 0.01% 585

Other funds holding ISTB

AA
Acorns Advisers Irvine, California $15.3B AUM 18.32% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
State of Wisconsin Investment Board
State of Wisconsin Investment Board Madison, Wisconsin $49.6B AUM 39.59% 1-Year Est. Return
Charles Schwab
Charles Schwab San Francisco, California $751B AUM 38.74% 1-Year Est. Return
TWP
Triad Wealth Partners Lawrence, Kansas $1.7B AUM 21.07% 1-Year Est. Return
Raymond James Financial
Raymond James Financial St Petersburg, Florida $369B AUM 28.27% 1-Year Est. Return
Jones Financial Companies
Jones Financial Companies Des Peres, Missouri $250B AUM 21.32% 1-Year Est. Return
Mariner
Mariner Overland Park, Kansas $95.2B AUM 32.92% 1-Year Est. Return
ST
Spinnaker Trust Portland, Maine $2.06B AUM 24.94% 1-Year Est. Return
TA
Townsend & Associates Westminster, Colorado $1.17B AUM 20.72% 1-Year Est. Return

William Blair & Company's ISTB Position: Q2 2026 in Review

William Blair & Company increased its iShares Core 1-5 Year USD Bond ETF (ISTB) stake by 1% in Q2 2026, buying an estimated $5.36K and bringing the position to 11,072 shares worth $534K. The position accounts for ﹤0.01% of the portfolio, ranked #1207.

William Blair & Company first reported a position in ISTB in Q1 2018 and has held it in 34 quarters since. The position peaked at $1.93M in Q2 2018. 397 funds tracked by Wall St. Rank hold ISTB as of Q2 2026.

  • William Blair & Company held 11,072 shares of iShares Core 1-5 Year USD Bond ETF worth $534K as of Q2 2026.
  • William Blair & Company bought 111 iShares Core 1-5 Year USD Bond ETF shares in Q2 2026, an estimated $5.36K.
  • iShares Core 1-5 Year USD Bond ETF made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #1207 holding.
  • William Blair & Company first reported a position in iShares Core 1-5 Year USD Bond ETF in Q1 2018 and has held it in 34 quarters since.
  • William Blair & Company's iShares Core 1-5 Year USD Bond ETF position peaked at $1.93M in Q2 2018.
  • 397 funds tracked by Wall St. Rank held iShares Core 1-5 Year USD Bond ETF as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.