iShares Government Money Market ETF
GMMF
8 hedge funds and large institutions have $33.4M invested in iShares Government Money Market ETF in 2025 Q3 according to their latest regulatory filings, with 1 funds opening new positions, 4 increasing their positions, 1 reducing their positions, and 1 closing their positions.
300% more repeat investments, than reductions
Existing positions increased: 4 | Existing positions reduced: 1
18% more capital invested
Capital invested by funds: $28.4M → $33.4M (+$5.02M)
0% more funds holding
Funds holding: 8 → 8 (0)
0% more first-time investments, than exits
New positions opened: 1 | Existing positions closed: 1
4.41% less ownership
Funds ownership: 53.25% → 48.83% (-4.4%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
HFAS
Hummer Financial Advisory Services
Chicago,
Illinois
|
+$2.37M |
| 2 |
TRCT
Tower Research Capital (TRC)
New York
|
+$1.56M |
| 3 |
Citadel Advisors
Miami,
Florida
|
+$1.08M |
| 4 |
TSMHT
Thurston Springer Miller Herd & Titak
Indianapolis,
Indiana
|
+$713K |
| 5 |
Royal Bank of Canada
Toronto,
Ontario, Canada
|
+$1.1K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Jane Street
New York
|
-$493K |
| 2 |
FTUS
Flow Traders U.S.
New York
|
-$219K |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
1
BlackRock
New York
| $25.1M | – | – | – |
|
|
HFAS
2
Hummer Financial Advisory Services
Chicago,
Illinois
| $2.77M | +$2.37M | +23,600 | +590% |
|
|
TRCT
3
Tower Research Capital (TRC)
New York
| $2.1M | +$1.56M | +15,513 | +289% |
|
|
4
Citadel Advisors
Miami,
Florida
| $2.03M | +$1.08M | +10,721 | +113% |
|
|
TSMHT
5
Thurston Springer Miller Herd & Titak
Indianapolis,
Indiana
| $714K | +$713K | +7,102 | New |
|
|
SC
6
Searle & Co
Greenwich,
Connecticut
| $301K | – | – | – |
|
|
7
Jane Street
New York
| $267K | -$493K | -4,913 | -65% |
|
|
8
Royal Bank of Canada
Toronto,
Ontario, Canada
| $61K | +$1.1K | +11 | +2% |
|
9
Wells Fargo
San Francisco,
California
| $20 | – | – | – |
|
|
FTUS
10
Flow Traders U.S.
New York
| – | -$219K | -2,182 | Closed |
|
GMMF Hedge Fund Activity: Q3 2025 in Review
8 of the 7,621 institutional investors tracked by Wall St. Rank reported a position in iShares Government Money Market ETF (GMMF) for Q3 2025, worth a combined $33.4M — up 18% from $28.4M a quarter earlier.
Fund positioning in GMMF was balanced in Q3 2025: 1 fund opened new positions, 1 closed out, 4 added to existing stakes and 1 trimmed.
The largest buyer was Hummer Financial Advisory Services, adding an estimated $2.37M. The largest seller was Jane Street, cutting an estimated $493K.
- 8 institutional investors held iShares Government Money Market ETF (GMMF) as of Q3 2025, unchanged from Q2 2025.
- Funds reported $33.4M of iShares Government Money Market ETF stock for Q3 2025, up 18% quarter-over-quarter.
- 1 fund opened new iShares Government Money Market ETF positions in Q3 2025 and 1 closed out, a net change of 0 holders.
- The largest iShares Government Money Market ETF buyer in Q3 2025 was Hummer Financial Advisory Services, an estimated $2.37M added.
- The largest iShares Government Money Market ETF seller in Q3 2025 was Jane Street, an estimated $493K sold.
Based on aggregated 13F filings for Q3 2025.