iShares Prime Money Market ETF
PMMF
19 hedge funds and large institutions have $136M invested in iShares Prime Money Market ETF in 2025 Q3 according to their latest regulatory filings, with 9 funds opening new positions, 4 increasing their positions, 3 reducing their positions, and 3 closing their positions.
200% more first-time investments, than exits
New positions opened: 9 | Existing positions closed: 3
46% more funds holding
Funds holding: 13 → 19 (+6)
33% more repeat investments, than reductions
Existing positions increased: 4 | Existing positions reduced: 3
13% more capital invested
Capital invested by funds: $120M → $136M (+$16.1M)
5.68% less ownership
Funds ownership: 47.18% → 41.5% (-5.7%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Royal Bank of Canada
Toronto,
Ontario, Canada
|
+$12M |
| 2 |
SA
Stewardship Advisors
Mount Joy,
Pennsylvania
|
+$2.44M |
| 3 |
TRCT
Tower Research Capital (TRC)
New York
|
+$1.78M |
| 4 |
Cambridge Investment Research Advisors
Fairfield,
Iowa
|
+$1.47M |
| 5 |
HP
Holistic Planning
Nacogdoches,
Texas
|
+$388K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citadel Advisors
Miami,
Florida
|
-$1.22M |
| 2 |
Jane Street
New York
|
-$861K |
| 3 |
SG
StoneX Group
New York
|
-$488K |
| 4 |
MOS
MGO One Seven
Beachwood,
Ohio
|
-$257K |
| 5 |
WS
Wedbush Securities
Los Angeles,
California
|
-$238K |
PMMF Hedge Fund Activity: Q3 2025 in Review
19 of the 7,641 institutional investors tracked by Wall St. Rank reported a position in iShares Prime Money Market ETF (PMMF) for Q3 2025, worth a combined $136M — up 13% from $120M a quarter earlier.
Buyers outnumbered sellers: 9 funds opened new PMMF positions and 3 closed out — a net gain of 6 holders — while 4 added to existing stakes and 3 trimmed.
The largest buyer was Royal Bank of Canada, adding an estimated $12M. The largest seller was Citadel Advisors, cutting an estimated $1.22M.
- 19 institutional investors held iShares Prime Money Market ETF (PMMF) as of Q3 2025, up from 13 in Q2 2025.
- Funds reported $136M of iShares Prime Money Market ETF stock for Q3 2025, up 13% quarter-over-quarter.
- 9 funds opened new iShares Prime Money Market ETF positions in Q3 2025 and 3 closed out, a net change of +6 holders.
- The largest iShares Prime Money Market ETF buyer in Q3 2025 was Royal Bank of Canada, an estimated $12M added.
- The largest iShares Prime Money Market ETF seller in Q3 2025 was Citadel Advisors, an estimated $1.22M sold.
Based on aggregated 13F filings for Q3 2025.