William Blair & Company
JMST icon

William Blair & Company’s JPMorgan Ultra-Short Municipal Income ETF JMST Stock Holding History

William Blair & Company’s Portfolio JMST Stock Details JMST Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$506K Buy
9,919
+1,539
+18% +$78.6K ﹤0.01% 1153
2025
Q4 		$427K Sell
8,380
-3,470
-29% -$177K ﹤0.01% 1197
2025
Q3 		$605K Buy
11,850
+1,708
+17% +$87.1K ﹤0.01% 1057
2025
Q2 		$516K Buy
10,142
+2,123
+26% +$108K ﹤0.01% 1080
2025
Q1 		$408K Sell
8,019
-624
-7% -$31.7K ﹤0.01% 1145
2024
Q4 		$438K Sell
8,643
-1,976
-19% -$100K ﹤0.01% 1136
2024
Q3 		$541K Buy
10,619
+1,588
+18% +$80.7K ﹤0.01% 1095
2024
Q2 		$458K Buy
9,031
+5,381
+147% +$273K ﹤0.01% 1118
2024
Q1 		$185K Sell
3,650
-423
-10% -$21.5K ﹤0.01% 1420
2023
Q4 		$207K Sell
4,073
-2,200
-35% -$111K ﹤0.01% 1388
2023
Q3 		$316K Sell
6,273
-15,027
-71% -$760K ﹤0.01% 1204
2023
Q2 		$1.08M Sell
21,300
-3,500
-14% -$177K ﹤0.01% 821
2023
Q1 		$1.26M Buy
24,800
+1,000
+4% +$50.6K 0.01% 776
2022
Q4 		$1.2M Sell
23,800
-112,037
-82% -$5.65M 0.01% 772
2022
Q3 		$6.83M Sell
135,837
-99,564
-42% -$5.03M 0.03% 352
2022
Q2 		$11.9M Sell
235,401
-54,755
-19% -$2.77M 0.05% 269
2022
Q1 		$14.7M Buy
290,156
+284,156
+4,736% +$14.4M 0.05% 265
2021
Q4 		$306K Hold
6,000
– – ﹤0.01% 1412
2021
Q3 		$306K Hold
6,000
– – ﹤0.01% 1339
2021
Q2 		$306K Sell
6,000
-365
-6% -$18.6K ﹤0.01% 1339
2021
Q1 		$325K Buy
+6,365
New +$325K ﹤0.01% 1299

Other funds holding JMST

Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return
Northwestern Mutual Wealth Management
Northwestern Mutual Wealth Management Milwaukee, Wisconsin $162B AUM 16.35% 1-Year Est. Return
LPL Financial
LPL Financial San Diego, California $377B AUM 19.32% 1-Year Est. Return
HWM
HB Wealth Management Atlanta, Georgia $15.5B AUM 18.35% 1-Year Est. Return
RCA
Resonant Capital Advisors Madison, Wisconsin $1.9B AUM 14.38% 1-Year Est. Return
Wells Fargo
Wells Fargo San Francisco, California $530B AUM 22.01% 1-Year Est. Return
NP
NorthRock Partners Minneapolis, Minnesota $6.2B AUM 15.8% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $544B AUM 28.31% 1-Year Est. Return
SL
Salomon & Ludwin Richmond, Virginia $1.12B AUM 14.38% 1-Year Est. Return

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

William Blair & Company increased its JPMorgan Ultra-Short Municipal Income ETF (JMST) stake by 18% in Q1 2026, buying an estimated $78.6K and bringing the position to 9,919 shares worth $506K. The position accounts for ﹤0.01% of the portfolio, ranked #1153.

William Blair & Company first reported a position in JMST in Q1 2021 and has held it in 21 quarters since. The position peaked at $14.7M in Q1 2022. 552 funds tracked by Wall St. Rank hold JMST as of Q1 2026.

  • William Blair & Company held 9,919 shares of JPMorgan Ultra-Short Municipal Income ETF worth $506K as of Q1 2026.
  • William Blair & Company bought 1,539 JPMorgan Ultra-Short Municipal Income ETF shares in Q1 2026, an estimated $78.6K.
  • JPMorgan Ultra-Short Municipal Income ETF made up ﹤0.01% of William Blair & Company's portfolio in Q1 2026, its #1153 holding.
  • William Blair & Company first reported a position in JPMorgan Ultra-Short Municipal Income ETF in Q1 2021 and has held it in 21 quarters since.
  • William Blair & Company's JPMorgan Ultra-Short Municipal Income ETF position peaked at $14.7M in Q1 2022.
  • 552 funds tracked by Wall St. Rank held JPMorgan Ultra-Short Municipal Income ETF as of Q1 2026.

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