State Street SPDR S&P MIDCAP 400 ETF Trust
1,366 hedge funds and large institutions have $15B invested in State Street SPDR S&P MIDCAP 400 ETF Trust in 2025 Q3 according to their latest regulatory filings, with 87 funds opening new positions, 355 increasing their positions, 483 reducing their positions, and 45 closing their positions.
93% more first-time investments, than exits
New positions opened: 87 | Existing positions closed: 45
64% more call options, than puts
Call options by funds: $499M | Put options by funds: $305M
6% more capital invested
Capital invested by funds: $14.2B → $15B (+$840M)
2% more funds holding in top 10
Funds holding in top 10: 58 → 59 (+1)
1% more funds holding
Funds holding: 1,349 → 1,366 (+17)
0.38% more ownership
Funds ownership: 62.77% → 63.15% (+0.38%)
27% less repeat investments, than reductions
Existing positions increased: 355 | Existing positions reduced: 483
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Morgan Stanley
New York
|
+$269M |
| 2 |
Goldman Sachs
New York
|
+$111M |
| 3 |
CPG
Cornerstone Planning Group
Fairfield,
New Jersey
|
+$109M |
| 4 |
Northwestern Mutual Wealth Management
Milwaukee,
Wisconsin
|
+$103M |
| 5 |
Barclays
London,
United Kingdom
|
+$84.6M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
MCM
Moore Capital Management
New York
|
-$172M |
| 2 |
Bank of America
Charlotte,
North Carolina
|
-$107M |
| 3 |
Royal Bank of Canada
Toronto,
Ontario, Canada
|
-$57.5M |
| 4 |
JP Morgan Chase
New York
|
-$47.3M |
| 5 |
SG Americas Securities
New York
|
-$39.8M |
MDY Hedge Fund Activity: Q3 2025 in Review
1,366 of the 7,638 institutional investors tracked by Wall St. Rank reported a position in State Street SPDR S&P MIDCAP 400 ETF Trust (MDY) for Q3 2025, worth a combined $15B — up 5.9% from $14.2B a quarter earlier.
Buyers outnumbered sellers: 87 funds opened new MDY positions and 45 closed out — a net gain of 42 holders — while 355 added to existing stakes and 483 trimmed.
The largest buyer was Morgan Stanley, adding an estimated $269M. The largest seller was Moore Capital Management, cutting an estimated $172M.
- 1,366 institutional investors held State Street SPDR S&P MIDCAP 400 ETF Trust (MDY) as of Q3 2025, up from 1,349 in Q2 2025.
- Funds reported $15B of State Street SPDR S&P MIDCAP 400 ETF Trust stock for Q3 2025, up 5.9% quarter-over-quarter.
- 87 funds opened new State Street SPDR S&P MIDCAP 400 ETF Trust positions in Q3 2025 and 45 closed out, a net change of +42 holders.
- The largest State Street SPDR S&P MIDCAP 400 ETF Trust buyer in Q3 2025 was Morgan Stanley, an estimated $269M added.
- The largest State Street SPDR S&P MIDCAP 400 ETF Trust seller in Q3 2025 was Moore Capital Management, an estimated $172M sold.
Based on aggregated 13F filings for Q3 2025.