State Street Prime Money Market ETF
1 hedge funds and large institutions have $1.68M invested in State Street Prime Money Market ETF in 2026 Q1 according to their latest regulatory filings, with 1 funds opening new positions, increasing their positions, reducing their positions, and closing their positions.
6.71% more ownership
Funds ownership: 0% → 6.71% (+6.7%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citadel Advisors
Miami,
Florida
|
+$1.68M |
Top Sellers
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
1
Citadel Advisors
Miami,
Florida
| $1.68M | +$1.68M | +16,777 | New |
|
MMK Hedge Fund Activity: Q1 2026 in Review
1 of the 8,133 institutional investors tracked by Wall St. Rank reported a position in State Street Prime Money Market ETF (MMK) for Q1 2026, worth a combined $1.68M.
Buyers outnumbered sellers: 1 fund opened new MMK positions and 0 closed out — a net gain of 1 holder — while 0 added to existing stakes and 0 trimmed.
The largest buyer was Citadel Advisors, opening a new position worth an estimated $1.68M.
- 1 institutional investor held State Street Prime Money Market ETF (MMK) as of Q1 2026, up from 0 in Q4 2025.
- Funds reported $1.68M of State Street Prime Money Market ETF stock for Q1 2026.
- 1 fund opened new State Street Prime Money Market ETF positions in Q1 2026 and 0 closed out, a net change of +1 holder.
- The largest State Street Prime Money Market ETF buyer in Q1 2026 was Citadel Advisors, an estimated $1.68M added.
Based on aggregated 13F filings for Q1 2026.