iShares Government Money Market ETF
GMMF
12 hedge funds and large institutions have $33.5M invested in iShares Government Money Market ETF in 2026 Q1 according to their latest regulatory filings, with 4 funds opening new positions, 2 increasing their positions, 3 reducing their positions, and 1 closing their positions.
300% more first-time investments, than exits
New positions opened: 4 | Existing positions closed: 1
33% more funds holding
Funds holding: 9 → 12 (+3)
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
5.04% less ownership
Funds ownership: 37.12% → 32.07% (-5%)
12% less capital inflows, than outflows
Capital inflows: $2.93M | Capital outflows: $3.34M
33% less repeat investments, than reductions
Existing positions increased: 2 | Existing positions reduced: 3
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Cambridge Investment Research Advisors
Fairfield,
Iowa
|
+$1.65M |
| 2 |
HFAS
Hummer Financial Advisory Services
Chicago,
Illinois
|
+$512K |
| 3 |
Granite Bay Wealth Management
Portsmouth,
New Hampshire
|
+$397K |
| 4 |
Thurston Springer Miller Herd & Titak
Indianapolis,
Indiana
|
+$198K |
| 5 |
Wellington-Altus USA
Winnipeg, Manitoba,
Manitoba, Canada
|
+$172K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Tower Research Capital (TRC)
New York
|
-$2.58M |
| 2 |
Citadel Advisors
Miami,
Florida
|
-$519K |
| 3 |
Jane Street
New York
|
-$205K |
| 4 |
Northcape Wealth Management
Williamsville,
New York
|
-$40.2K |
GMMF Hedge Fund Activity: Q1 2026 in Review
12 of the 8,220 institutional investors tracked by Wall St. Rank reported a position in iShares Government Money Market ETF (GMMF) for Q1 2026, worth a combined $33.5M — down 0.95% from $33.9M a quarter earlier.
Buyers outnumbered sellers: 4 funds opened new GMMF positions and 1 closed out — a net gain of 3 holders — while 2 added to existing stakes and 3 trimmed.
The largest buyer was Cambridge Investment Research Advisors, opening a new position worth an estimated $1.65M. The largest seller was Tower Research Capital (TRC), exiting entirely with an estimated $2.58M sold.
- 12 institutional investors held iShares Government Money Market ETF (GMMF) as of Q1 2026, up from 9 in Q4 2025.
- Funds reported $33.5M of iShares Government Money Market ETF stock for Q1 2026, down 0.95% quarter-over-quarter.
- 4 funds opened new iShares Government Money Market ETF positions in Q1 2026 and 1 closed out, a net change of +3 holders.
- The largest iShares Government Money Market ETF buyer in Q1 2026 was Cambridge Investment Research Advisors, an estimated $1.65M added.
- The largest iShares Government Money Market ETF seller in Q1 2026 was Tower Research Capital (TRC), an estimated $2.58M sold.
Based on aggregated 13F filings for Q1 2026.