iShares Core 1-5 Year USD Bond ETF
ISTB
384 hedge funds and large institutions have $3.06B invested in iShares Core 1-5 Year USD Bond ETF in 2025 Q2 according to their latest regulatory filings, with 28 funds opening new positions, 164 increasing their positions, 126 reducing their positions, and 25 closing their positions.
30% more repeat investments, than reductions
Existing positions increased: 164 | Existing positions reduced: 126
12% more first-time investments, than exits
New positions opened: 28 | Existing positions closed: 25
2% more capital invested
Capital invested by funds: $3B → $3.06B (+$61M)
0% more funds holding in top 10
Funds holding in top 10: 33 → 33 (0)
1% less funds holding
Funds holding: 386 → 384 (-2)
1.57% less ownership
Funds ownership: 69.36% → 67.79% (-1.6%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
+$72.6M |
| 2 |
LPL Financial
San Diego,
California
|
+$17M |
| 3 |
Ameriprise
Minneapolis,
Minnesota
|
+$9.29M |
| 4 |
JP Morgan Chase
New York
|
+$8.76M |
| 5 |
Jones Financial Companies
Des Peres,
Missouri
|
+$7.44M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AA
Acorns Advisers
Irvine,
California
|
-$34.9M |
| 2 |
Charles Schwab
San Francisco,
California
|
-$28.2M |
| 3 |
GWM
Geneos Wealth Management
Englewood,
Colorado
|
-$23.2M |
| 4 |
Royal Bank of Canada
Toronto,
Ontario, Canada
|
-$15.9M |
| 5 |
Thrivent Financial for Lutherans
Minneapolis,
Minnesota
|
-$11.5M |
ISTB Hedge Fund Activity: Q2 2025 in Review
384 of the 7,595 institutional investors tracked by Wall St. Rank reported a position in iShares Core 1-5 Year USD Bond ETF (ISTB) for Q2 2025, worth a combined $3.06B — up 2% from $3B a quarter earlier.
Buyers outnumbered sellers: 28 funds opened new ISTB positions and 25 closed out — a net gain of 3 holders — while 164 added to existing stakes and 126 trimmed.
The largest buyer was BlackRock, adding an estimated $72.6M. The largest seller was Acorns Advisers, cutting an estimated $34.9M.
- 384 institutional investors held iShares Core 1-5 Year USD Bond ETF (ISTB) as of Q2 2025, down from 386 in Q1 2025.
- Funds reported $3.06B of iShares Core 1-5 Year USD Bond ETF stock for Q2 2025, up 2% quarter-over-quarter.
- 28 funds opened new iShares Core 1-5 Year USD Bond ETF positions in Q2 2025 and 25 closed out, a net change of +3 holders.
- The largest iShares Core 1-5 Year USD Bond ETF buyer in Q2 2025 was BlackRock, an estimated $72.6M added.
- The largest iShares Core 1-5 Year USD Bond ETF seller in Q2 2025 was Acorns Advisers, an estimated $34.9M sold.
Based on aggregated 13F filings for Q2 2025.