State Street Prime Money Market ETF
MMK
1 hedge funds and large institutions have $319K invested in State Street Prime Money Market ETF in 2026 Q2 according to their latest regulatory filings, with 0 funds opening new positions, increasing their positions, 1 reducing their positions, and closing their positions.
0% more funds holding
Funds holding: 1 → 1 (0)
5.53% less ownership
Funds ownership: 6.71% → 1.18% (-5.5%)
81% less capital invested
Capital invested by funds: $1.68M → $319K (-$1.36M)
100% less repeat investments, than reductions
Existing positions increased: 0 | Existing positions reduced: 1
Top Buyers
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citadel Advisors
Miami,
Florida
|
-$1.36M |
MMK Hedge Fund Activity: Q2 2026 in Review
1 of the 8,331 institutional investors tracked by Wall St. Rank reported a position in State Street Prime Money Market ETF (MMK) for Q2 2026, worth a combined $319K — down 81% from $1.68M a quarter earlier.
Fund positioning in MMK was balanced in Q2 2026: 0 funds opened new positions, 0 closed out, 0 added to existing stakes and 1 trimmed.
The largest seller was Citadel Advisors, cutting an estimated $1.36M.
- 1 institutional investor held State Street Prime Money Market ETF (MMK) as of Q2 2026, unchanged from Q1 2026.
- Funds reported $319K of State Street Prime Money Market ETF stock for Q2 2026, down 81% quarter-over-quarter.
- 0 funds opened new State Street Prime Money Market ETF positions in Q2 2026 and 0 closed out.
- The largest State Street Prime Money Market ETF seller in Q2 2026 was Citadel Advisors, an estimated $1.36M sold.
Based on aggregated 13F filings for Q2 2026.