William Blair & Company
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William Blair & Company’s iShares Short-Term National Muni Bond ETF SUB Stock Holding History

William Blair & Company’s Portfolio SUB Stock Details SUB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$3.92M Buy
36,770
+2,524
+7% +$270K 0.01% 560
2025
Q4 		$3.65M Sell
34,246
-13
-0% -$1.39K 0.01% 599
2025
Q3 		$3.66M Sell
34,259
-276
-0.8% -$29.5K 0.01% 599
2025
Q2 		$3.67M Buy
34,535
+1,721
+5% +$182K 0.01% 579
2025
Q1 		$3.47M Sell
32,814
-4,140
-11% -$438K 0.01% 579
2024
Q4 		$3.9M Sell
36,954
-6,853
-16% -$724K 0.01% 558
2024
Q3 		$4.65M Sell
43,807
-15,826
-27% -$1.67M 0.01% 520
2024
Q2 		$6.23M Buy
59,633
+3,332
+6% +$348K 0.02% 429
2024
Q1 		$5.9M Buy
56,301
+7,606
+16% +$799K 0.02% 447
2023
Q4 		$5.13M Sell
48,695
-738
-1% -$76.8K 0.02% 458
2023
Q3 		$5.08M Buy
49,433
+2,765
+6% +$287K 0.02% 432
2023
Q2 		$4.86M Sell
46,668
-7,865
-14% -$819K 0.02% 457
2023
Q1 		$5.71M Sell
54,533
-9,197
-14% -$960K 0.02% 412
2022
Q4 		$6.65M Buy
63,730
+41,012
+181% +$4.24M 0.03% 371
2022
Q3 		$2.33M Sell
22,718
-23,644
-51% -$2.47M 0.01% 578
2022
Q2 		$4.85M Sell
46,362
-52,889
-53% -$5.5M 0.02% 424
2022
Q1 		$10.4M Buy
99,251
+71,370
+256% +$7.55M 0.04% 326
2021
Q4 		$2.99M Buy
27,881
+3,765
+16% +$404K 0.01% 619
2021
Q3 		$2.59M Buy
24,116
+367
+2% +$39.6K 0.01% 632
2021
Q2 		$2.56M Buy
23,749
+3,480
+17% +$375K 0.01% 631
2021
Q1 		$2.19M Buy
20,269
+320
+2% +$34.5K 0.01% 664
2020
Q4 		$2.16M Buy
19,949
+1,334
+7% +$144K 0.01% 624
2020
Q3 		$2.01M Buy
18,615
+4,813
+35% +$520K 0.01% 581
2020
Q2 		$1.49M Sell
13,802
-479
-3% -$51.3K 0.01% 626
2020
Q1 		$1.52M Buy
14,281
+8
+0.1% +$851 0.01% 572
2019
Q4 		$1.52M Buy
14,273
+1,157
+9% +$123K 0.01% 671
2019
Q3 		$1.4M Buy
13,116
+14
+0.1% +$1.5K 0.01% 668
2019
Q2 		$1.4M Buy
13,102
+5,047
+63% +$535K 0.01% 672
2019
Q1 		$854K Buy
8,055
+2,441
+43% +$258K 0.01% 784
2018
Q4 		$592K Hold
5,614
– – ﹤0.01% 856
2018
Q3 		$588K Buy
+5,614
New +$590K ﹤0.01% 906
2018
Q1 		– Sell
-15,000
Closed -$1.57M – 1584
2017
Q4 		$1.57M Buy
+15,000
New +$1.58M 0.01% 625

Other funds holding SUB

Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return
Mercer Global Advisors
Mercer Global Advisors Denver, Colorado $67.6B AUM 18.3% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $544B AUM 28.31% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
Creative Planning
Creative Planning Overland Park, Kansas $147B AUM 18.73% 1-Year Est. Return
SEI Investments
SEI Investments Oaks, Pennsylvania $108B AUM 26.14% 1-Year Est. Return
Northwestern Mutual Wealth Management
Northwestern Mutual Wealth Management Milwaukee, Wisconsin $162B AUM 16.35% 1-Year Est. Return
Citigroup
Citigroup New York $235B AUM 32.99% 1-Year Est. Return
CAPTRUST Financial Advisors
CAPTRUST Financial Advisors Raleigh, North Carolina $57.3B AUM 18.32% 1-Year Est. Return

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

William Blair & Company increased its iShares Short-Term National Muni Bond ETF (SUB) stake by 7.4% in Q1 2026, buying an estimated $270K and bringing the position to 36,770 shares worth $3.92M. The position accounts for 0.01% of the portfolio, ranked #560.

William Blair & Company first reported a position in SUB in Q4 2017 and has held it in 32 quarters since. The position peaked at $10.4M in Q1 2022. 884 funds tracked by Wall St. Rank hold SUB as of Q1 2026.

  • William Blair & Company held 36,770 shares of iShares Short-Term National Muni Bond ETF worth $3.92M as of Q1 2026.
  • William Blair & Company bought 2,524 iShares Short-Term National Muni Bond ETF shares in Q1 2026, an estimated $270K.
  • iShares Short-Term National Muni Bond ETF made up 0.01% of William Blair & Company's portfolio in Q1 2026, its #560 holding.
  • William Blair & Company first reported a position in iShares Short-Term National Muni Bond ETF in Q4 2017 and has held it in 32 quarters since.
  • William Blair & Company's iShares Short-Term National Muni Bond ETF position peaked at $10.4M in Q1 2022.
  • 884 funds tracked by Wall St. Rank held iShares Short-Term National Muni Bond ETF as of Q1 2026.

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