iShares Core 1-5 Year USD Bond ETF
ISTB
380 hedge funds and large institutions have $3.14B invested in iShares Core 1-5 Year USD Bond ETF in 2025 Q3 according to their latest regulatory filings, with 29 funds opening new positions, 164 increasing their positions, 123 reducing their positions, and 27 closing their positions.
33% more repeat investments, than reductions
Existing positions increased: 164 | Existing positions reduced: 123
1.17% more ownership
Funds ownership: 67.79% → 68.96% (+1.2%)
7% more first-time investments, than exits
New positions opened: 29 | Existing positions closed: 27
3% more capital invested
Capital invested by funds: $3.06B → $3.14B (+$78.1M)
1% less funds holding
Funds holding: 384 → 380 (-4)
9% less funds holding in top 10
Funds holding in top 10: 33 → 30 (-3)
18% less call options, than puts
Call options by funds: $640K | Put options by funds: $781K
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AA
Acorns Advisers
Irvine,
California
|
+$38.6M |
| 2 |
BCWM
Bartlett & Co Wealth Management
Cincinnati,
Ohio
|
+$20.5M |
| 3 |
AC
Apella Capital
West Hartford,
Connecticut
|
+$15.4M |
| 4 |
Goldman Sachs
New York
|
+$9.41M |
| 5 |
Jones Financial Companies
Des Peres,
Missouri
|
+$9.39M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
-$23.6M |
| 2 |
AA
Argent Advisors
Monroe,
Louisiana
|
-$11.2M |
| 3 |
LPL Financial
San Diego,
California
|
-$9.81M |
| 4 |
LWA
Lineweaver Wealth Advisors
Valley View,
Ohio
|
-$9.79M |
| 5 |
Citadel Advisors
Miami,
Florida
|
-$8.25M |
ISTB Hedge Fund Activity: Q3 2025 in Review
380 of the 7,638 institutional investors tracked by Wall St. Rank reported a position in iShares Core 1-5 Year USD Bond ETF (ISTB) for Q3 2025, worth a combined $3.14B — up 2.6% from $3.06B a quarter earlier.
Buyers outnumbered sellers: 29 funds opened new ISTB positions and 27 closed out — a net gain of 2 holders — while 164 added to existing stakes and 123 trimmed.
The largest buyer was Acorns Advisers, adding an estimated $38.6M. The largest seller was BlackRock, cutting an estimated $23.6M.
- 380 institutional investors held iShares Core 1-5 Year USD Bond ETF (ISTB) as of Q3 2025, down from 384 in Q2 2025.
- Funds reported $3.14B of iShares Core 1-5 Year USD Bond ETF stock for Q3 2025, up 2.6% quarter-over-quarter.
- 29 funds opened new iShares Core 1-5 Year USD Bond ETF positions in Q3 2025 and 27 closed out, a net change of +2 holders.
- The largest iShares Core 1-5 Year USD Bond ETF buyer in Q3 2025 was Acorns Advisers, an estimated $38.6M added.
- The largest iShares Core 1-5 Year USD Bond ETF seller in Q3 2025 was BlackRock, an estimated $23.6M sold.
Based on aggregated 13F filings for Q3 2025.