iShares Russell 1000 ETF
1,499 hedge funds and large institutions have $37.8B invested in iShares Russell 1000 ETF in 2025 Q4 according to their latest regulatory filings, with 161 funds opening new positions, 411 increasing their positions, 498 reducing their positions, and 57 closing their positions.
182% more first-time investments, than exits
New positions opened: 161 | Existing positions closed: 57
71% more call options, than puts
Call options by funds: $20.4M | Put options by funds: $11.9M
5% more funds holding
Funds holding: 1,422 → 1,499 (+77)
5% more capital invested
Capital invested by funds: $36B → $37.8B (+$1.83B)
1.54% more ownership
Funds ownership: 80.24% → 81.78% (+1.5%)
1% more funds holding in top 10
Funds holding in top 10: 98 → 99 (+1)
17% less repeat investments, than reductions
Existing positions increased: 411 | Existing positions reduced: 498
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AC
Allstate Corporation
Northbrook,
Illinois
|
+$222M |
| 2 |
Bank of America
Charlotte,
North Carolina
|
+$187M |
| 3 |
BlackRock
New York
|
+$182M |
| 4 |
Millennium Management
New York
|
+$169M |
| 5 |
Envestnet Asset Management
Chicago,
Illinois
|
+$142M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Morgan Stanley
New York
|
-$336M |
| 2 |
Goldman Sachs
New York
|
-$160M |
| 3 |
Two Sigma Investments
New York
|
-$69.1M |
| 4 |
Kovitz Investment Group Partners
Chicago,
Illinois
|
-$64.6M |
| 5 |
FA
Fountainhead AM
Warren,
New Jersey
|
-$59.5M |
IWB Hedge Fund Activity: Q4 2025 in Review
1,499 of the 8,284 institutional investors tracked by Wall St. Rank reported a position in iShares Russell 1000 ETF (IWB) for Q4 2025, worth a combined $37.8B — up 5.1% from $36B a quarter earlier.
Buyers outnumbered sellers: 161 funds opened new IWB positions and 57 closed out — a net gain of 104 holders — while 411 added to existing stakes and 498 trimmed.
The largest buyer was Allstate Corporation, adding an estimated $222M. The largest seller was Morgan Stanley, cutting an estimated $336M.
- 1,499 institutional investors held iShares Russell 1000 ETF (IWB) as of Q4 2025, up from 1,422 in Q3 2025.
- Funds reported $37.8B of iShares Russell 1000 ETF stock for Q4 2025, up 5.1% quarter-over-quarter.
- 161 funds opened new iShares Russell 1000 ETF positions in Q4 2025 and 57 closed out, a net change of +104 holders.
- The largest iShares Russell 1000 ETF buyer in Q4 2025 was Allstate Corporation, an estimated $222M added.
- The largest iShares Russell 1000 ETF seller in Q4 2025 was Morgan Stanley, an estimated $336M sold.
Based on aggregated 13F filings for Q4 2025.