iShares Core 1-5 Year USD Bond ETF
ISTB
388 hedge funds and large institutions have $2.98B invested in iShares Core 1-5 Year USD Bond ETF in 2025 Q1 according to their latest regulatory filings, with 40 funds opening new positions, 161 increasing their positions, 124 reducing their positions, and 34 closing their positions.
36% more capital inflows, than outflows
Capital inflows: $267M | Capital outflows: $196M
30% more repeat investments, than reductions
Existing positions increased: 161 | Existing positions reduced: 124
18% more first-time investments, than exits
New positions opened: 40 | Existing positions closed: 34
1.26% more ownership
Funds ownership: 67.55% → 68.8% (+1.3%)
1% more funds holding
Funds holding: 384 → 388 (+4)
6% less funds holding in top 10
Funds holding in top 10: 35 → 33 (-2)
100% less call options, than puts
Call options by funds: $0 | Put options by funds: $5K
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
+$112M |
| 2 |
Renaissance Technologies
New York
|
+$14.6M |
| 3 |
Royal Bank of Canada
Toronto,
Ontario, Canada
|
+$11.7M |
| 4 |
Apella Capital
West Hartford,
Connecticut
|
+$9.7M |
| 5 |
Acorns Advisers
Irvine,
California
|
+$9.34M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Trust Point Inc
La Crosse,
Wisconsin
|
-$76.1M |
| 2 |
Morgan Stanley
New York
|
-$17M |
| 3 |
Boyd Wealth Management
Sacramento,
California
|
-$11.7M |
| 4 |
Ameriprise
Minneapolis,
Minnesota
|
-$9.8M |
| 5 |
McKinley Carter Wealth Services
Wheeling,
West Virginia
|
-$7.95M |
ISTB Hedge Fund Activity: Q1 2025 in Review
388 of the 7,488 institutional investors tracked by Wall St. Rank reported a position in iShares Core 1-5 Year USD Bond ETF (ISTB) for Q1 2025, worth a combined $2.98B — up 3.7% from $2.87B a quarter earlier.
Buyers outnumbered sellers: 40 funds opened new ISTB positions and 34 closed out — a net gain of 6 holders — while 161 added to existing stakes and 124 trimmed.
The largest buyer was BlackRock, adding an estimated $112M. The largest seller was Trust Point Inc, cutting an estimated $76.1M.
- 388 institutional investors held iShares Core 1-5 Year USD Bond ETF (ISTB) as of Q1 2025, up from 384 in Q4 2024.
- Funds reported $2.98B of iShares Core 1-5 Year USD Bond ETF stock for Q1 2025, up 3.7% quarter-over-quarter.
- 40 funds opened new iShares Core 1-5 Year USD Bond ETF positions in Q1 2025 and 34 closed out, a net change of +6 holders.
- The largest iShares Core 1-5 Year USD Bond ETF buyer in Q1 2025 was BlackRock, an estimated $112M added.
- The largest iShares Core 1-5 Year USD Bond ETF seller in Q1 2025 was Trust Point Inc, an estimated $76.1M sold.
Based on aggregated 13F filings for Q1 2025.