iShares Prime Money Market ETF
PMMF
30 hedge funds and large institutions have $143M invested in iShares Prime Money Market ETF in 2026 Q1 according to their latest regulatory filings, with 13 funds opening new positions, 8 increasing their positions, 5 reducing their positions, and 4 closing their positions.
225% more first-time investments, than exits
New positions opened: 13 | Existing positions closed: 4
60% more repeat investments, than reductions
Existing positions increased: 8 | Existing positions reduced: 5
47% more capital inflows, than outflows
Capital inflows: $22.8M | Capital outflows: $15.5M
43% more funds holding
Funds holding: 21 → 30 (+9)
2.71% less ownership
Funds ownership: 32.24% → 29.53% (-2.7%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Tower Research Capital (TRC)
New York
|
+$5.54M |
| 2 |
Money Concepts Capital
Palm Beach Gardens,
Florida
|
+$3.62M |
| 3 |
Sulzberger Capital Advisors
Miami,
Florida
|
+$3.38M |
| 4 |
Stewardship Advisors
Mount Joy,
Pennsylvania
|
+$2.96M |
| 5 |
Capital Square
Chattanooga,
Tennessee
|
+$1.44M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Hikari Power
Tokyo,
Japan
|
-$10.3M |
| 2 |
Royal Bank of Canada
Toronto,
Ontario, Canada
|
-$3.51M |
| 3 |
Wedbush Securities
Los Angeles,
California
|
-$414K |
| 4 |
HRT Financial
New York
|
-$365K |
| 5 |
Bank of Montreal
Toronto,
Ontario, Canada
|
-$354K |
PMMF Hedge Fund Activity: Q1 2026 in Review
30 of the 8,227 institutional investors tracked by Wall St. Rank reported a position in iShares Prime Money Market ETF (PMMF) for Q1 2026, worth a combined $143M — up 5.6% from $135M a quarter earlier.
Buyers outnumbered sellers: 13 funds opened new PMMF positions and 4 closed out — a net gain of 9 holders — while 8 added to existing stakes and 5 trimmed.
The largest buyer was Tower Research Capital (TRC), opening a new position worth an estimated $5.54M. The largest seller was Hikari Power, exiting entirely with an estimated $10.3M sold.
- 30 institutional investors held iShares Prime Money Market ETF (PMMF) as of Q1 2026, up from 21 in Q4 2025.
- Funds reported $143M of iShares Prime Money Market ETF stock for Q1 2026, up 5.6% quarter-over-quarter.
- 13 funds opened new iShares Prime Money Market ETF positions in Q1 2026 and 4 closed out, a net change of +9 holders.
- The largest iShares Prime Money Market ETF buyer in Q1 2026 was Tower Research Capital (TRC), an estimated $5.54M added.
- The largest iShares Prime Money Market ETF seller in Q1 2026 was Hikari Power, an estimated $10.3M sold.
Based on aggregated 13F filings for Q1 2026.