iShares National Muni Bond ETF
1,634 hedge funds and large institutions have $37.8B invested in iShares National Muni Bond ETF in 2026 Q1 according to their latest regulatory filings, with 121 funds opening new positions, 794 increasing their positions, 503 reducing their positions, and 90 closing their positions.
58% more repeat investments, than reductions
Existing positions increased: 794 | Existing positions reduced: 503
34% more first-time investments, than exits
New positions opened: 121 | Existing positions closed: 90
1.95% more ownership
Funds ownership: 86.76% → 88.71% (+2%)
5% more capital invested
Capital invested by funds: $36.1B → $37.8B (+$1.75B)
0% more funds holding
Funds holding: 1,633 → 1,634 (+1)
5% less funds holding in top 10
Funds holding in top 10: 101 → 96 (-5)
56% less call options, than puts
Call options by funds: $131M | Put options by funds: $300M
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
UBS Group
Zurich,
Switzerland
|
+$557M |
| 2 |
Bank of America
Charlotte,
North Carolina
|
+$512M |
| 3 |
Envestnet Asset Management
Chicago,
Illinois
|
+$271M |
| 4 |
PAS
Park Avenue Securities
New York
|
+$116M |
| 5 |
Fisher Asset Management
Camas,
Washington
|
+$94.9M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
TIAA Trust, National Association
Charlotte,
North Carolina
|
-$587M |
| 2 |
LP
LMR Partners
London,
United Kingdom
|
-$161M |
| 3 |
AC
Allstate Corporation
Northbrook,
Illinois
|
-$138M |
| 4 |
Envestnet Portfolio Solutions
Chicago,
Illinois
|
-$62.1M |
| 5 |
Ameriprise
Minneapolis,
Minnesota
|
-$58.8M |
MUB Hedge Fund Activity: Q1 2026 in Review
1,634 of the 8,207 institutional investors tracked by Wall St. Rank reported a position in iShares National Muni Bond ETF (MUB) for Q1 2026, worth a combined $37.8B — up 4.8% from $36.1B a quarter earlier.
Buyers outnumbered sellers: 121 funds opened new MUB positions and 90 closed out — a net gain of 31 holders — while 794 added to existing stakes and 503 trimmed.
The largest buyer was UBS Group, adding an estimated $557M. The largest seller was TIAA Trust, National Association, cutting an estimated $587M.
- 1,634 institutional investors held iShares National Muni Bond ETF (MUB) as of Q1 2026, up from 1,633 in Q4 2025.
- Funds reported $37.8B of iShares National Muni Bond ETF stock for Q1 2026, up 4.8% quarter-over-quarter.
- 121 funds opened new iShares National Muni Bond ETF positions in Q1 2026 and 90 closed out, a net change of +31 holders.
- The largest iShares National Muni Bond ETF buyer in Q1 2026 was UBS Group, an estimated $557M added.
- The largest iShares National Muni Bond ETF seller in Q1 2026 was TIAA Trust, National Association, an estimated $587M sold.
Based on aggregated 13F filings for Q1 2026.