iShares Prime Money Market ETF
PMMF
21 hedge funds and large institutions have $135M invested in iShares Prime Money Market ETF in 2025 Q4 according to their latest regulatory filings, with 6 funds opening new positions, 7 increasing their positions, 4 reducing their positions, and 4 closing their positions.
75% more repeat investments, than reductions
Existing positions increased: 7 | Existing positions reduced: 4
50% more first-time investments, than exits
New positions opened: 6 | Existing positions closed: 4
11% more funds holding
Funds holding: 19 → 21 (+2)
0% less capital invested
Capital invested by funds: $136M → $135M (-$621K)
9.26% less ownership
Funds ownership: 41.5% → 32.24% (-9.3%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Cambridge Investment Research Advisors
Fairfield,
Iowa
|
+$2.91M |
| 2 |
1CP
17 Capital Partners
Pheonix,
Arizona
|
+$2.38M |
| 3 |
SCA
Sulzberger Capital Advisors
Miami,
Florida
|
+$1.48M |
| 4 |
HP
Holistic Planning
Nacogdoches,
Texas
|
+$731K |
| 5 |
SA
Stewardship Advisors
Mount Joy,
Pennsylvania
|
+$566K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Royal Bank of Canada
Toronto,
Ontario, Canada
|
-$5.45M |
| 2 |
Citadel Advisors
Miami,
Florida
|
-$2.11M |
| 3 |
TRCT
Tower Research Capital (TRC)
New York
|
-$1.78M |
| 4 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
-$302K |
| 5 |
WS
Wedbush Securities
Los Angeles,
California
|
-$205K |
PMMF Hedge Fund Activity: Q4 2025 in Review
21 of the 8,270 institutional investors tracked by Wall St. Rank reported a position in iShares Prime Money Market ETF (PMMF) for Q4 2025, worth a combined $135M — down 0.46% from $136M a quarter earlier.
Buyers outnumbered sellers: 6 funds opened new PMMF positions and 4 closed out — a net gain of 2 holders — while 7 added to existing stakes and 4 trimmed.
The largest buyer was Cambridge Investment Research Advisors, adding an estimated $2.91M. The largest seller was Royal Bank of Canada, cutting an estimated $5.45M.
- 21 institutional investors held iShares Prime Money Market ETF (PMMF) as of Q4 2025, up from 19 in Q3 2025.
- Funds reported $135M of iShares Prime Money Market ETF stock for Q4 2025, down 0.46% quarter-over-quarter.
- 6 funds opened new iShares Prime Money Market ETF positions in Q4 2025 and 4 closed out, a net change of +2 holders.
- The largest iShares Prime Money Market ETF buyer in Q4 2025 was Cambridge Investment Research Advisors, an estimated $2.91M added.
- The largest iShares Prime Money Market ETF seller in Q4 2025 was Royal Bank of Canada, an estimated $5.45M sold.
Based on aggregated 13F filings for Q4 2025.