iShares Prime Money Market ETF
PMMF
29 hedge funds and large institutions have $143M invested in iShares Prime Money Market ETF in 2026 Q1 according to their latest regulatory filings, with 12 funds opening new positions, 8 increasing their positions, 5 reducing their positions, and 4 closing their positions.
200% more first-time investments, than exits
New positions opened: 12 | Existing positions closed: 4
60% more repeat investments, than reductions
Existing positions increased: 8 | Existing positions reduced: 5
38% more funds holding
Funds holding: 21 → 29 (+8)
6% more capital invested
Capital invested by funds: $135M → $143M (+$7.6M)
2.72% less ownership
Funds ownership: 32.24% → 29.52% (-2.7%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
TRCT
Tower Research Capital (TRC)
New York
|
+$5.54M |
| 2 |
MCC
Money Concepts Capital
Palm Beach Gardens,
Florida
|
+$3.62M |
| 3 |
SCA
Sulzberger Capital Advisors
Miami,
Florida
|
+$3.38M |
| 4 |
SA
Stewardship Advisors
Mount Joy,
Pennsylvania
|
+$2.96M |
| 5 |
CS
Capital Square
Chattanooga,
Tennessee
|
+$1.44M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
HP
Hikari Power
Tokyo,
Japan
|
-$10.3M |
| 2 |
Royal Bank of Canada
Toronto,
Ontario, Canada
|
-$3.51M |
| 3 |
WS
Wedbush Securities
Los Angeles,
California
|
-$414K |
| 4 |
HF
HRT Financial
New York
|
-$365K |
| 5 |
Bank of Montreal
Toronto,
Ontario, Canada
|
-$354K |
PMMF Hedge Fund Activity: Q1 2026 in Review
29 of the 8,126 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: 12 funds opened new PMMF positions and 4 closed out — a net gain of 8 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.
- 29 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.
- 12 funds opened new iShares Prime Money Market ETF positions in Q1 2026 and 4 closed out, a net change of +8 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.