State Street SPDR S&P MIDCAP 400 ETF Trust
1,437 hedge funds and large institutions have $15.3B invested in State Street SPDR S&P MIDCAP 400 ETF Trust in 2025 Q4 according to their latest regulatory filings, with 152 funds opening new positions, 356 increasing their positions, 491 reducing their positions, and 57 closing their positions.
167% more first-time investments, than exits
New positions opened: 152 | Existing positions closed: 57
110% more call options, than puts
Call options by funds: $682M | Put options by funds: $325M
5% more funds holding
Funds holding: 1,368 → 1,437 (+69)
2% more capital invested
Capital invested by funds: $15B → $15.3B (+$278M)
0.07% less ownership
Funds ownership: 63.15% → 63.08% (-0.07%)
2% less funds holding in top 10
Funds holding in top 10: 59 → 58 (-1)
27% less repeat investments, than reductions
Existing positions increased: 356 | Existing positions reduced: 491
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Kayne Anderson Rudnick Investment Management
Los Angeles,
California
|
+$237M |
| 2 |
HF
HRT Financial
New York
|
+$85.3M |
| 3 |
BNP Paribas Financial Markets
Paris,
France
|
+$54.4M |
| 4 |
Wells Fargo
San Francisco,
California
|
+$52.2M |
| 5 |
Balyasny Asset Management
Chicago,
Illinois
|
+$51.6M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Morgan Stanley
New York
|
-$398M |
| 2 |
MCM
Moore Capital Management
New York
|
-$203M |
| 3 |
CPG
Cornerstone Planning Group
Fairfield,
New Jersey
|
-$111M |
| 4 |
Barclays
London,
United Kingdom
|
-$78.1M |
| 5 |
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Toronto,
Ontario, Canada
|
-$29.8M |
MDY Hedge Fund Activity: Q4 2025 in Review
1,437 of the 8,284 institutional investors tracked by Wall St. Rank reported a position in State Street SPDR S&P MIDCAP 400 ETF Trust (MDY) for Q4 2025, worth a combined $15.3B — up 1.8% from $15B a quarter earlier.
Buyers outnumbered sellers: 152 funds opened new MDY positions and 57 closed out — a net gain of 95 holders — while 356 added to existing stakes and 491 trimmed.
The largest buyer was Kayne Anderson Rudnick Investment Management, adding an estimated $237M. The largest seller was Morgan Stanley, cutting an estimated $398M.
- 1,437 institutional investors held State Street SPDR S&P MIDCAP 400 ETF Trust (MDY) as of Q4 2025, up from 1,368 in Q3 2025.
- Funds reported $15.3B of State Street SPDR S&P MIDCAP 400 ETF Trust stock for Q4 2025, up 1.8% quarter-over-quarter.
- 152 funds opened new State Street SPDR S&P MIDCAP 400 ETF Trust positions in Q4 2025 and 57 closed out, a net change of +95 holders.
- The largest State Street SPDR S&P MIDCAP 400 ETF Trust buyer in Q4 2025 was Kayne Anderson Rudnick Investment Management, an estimated $237M added.
- The largest State Street SPDR S&P MIDCAP 400 ETF Trust seller in Q4 2025 was Morgan Stanley, an estimated $398M sold.
Based on aggregated 13F filings for Q4 2025.