ProShares Short MidCap400
4 hedge funds and large institutions have $446K invested in ProShares Short MidCap400 in 2026 Q1 according to their latest regulatory filings, with 1 funds opening new positions, 0 increasing their positions, 2 reducing their positions, and closing their positions.
236% more capital invested
Capital invested by funds: $133K → $446K (+$314K)
33% more funds holding
Funds holding: 3 → 4 (+1)
8.45% more ownership
Funds ownership: 3.47% → 11.91% (+8.4%)
100% less repeat investments, than reductions
Existing positions increased: 0 | Existing positions reduced: 2
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
+$370K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
TRCT
Tower Research Capital (TRC)
New York
|
-$60.1K |
| 2 |
Morgan Stanley
New York
|
-$34 |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
1
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
| $378K | +$370K | +22,065 | New |
|
|
TRCT
2
Tower Research Capital (TRC)
New York
| $68.3K | -$60.1K | -3,587 | -47% |
|
|
3
Morgan Stanley
New York
| $29 | -$34 | -2 | -67% |
|
4
Wells Fargo
San Francisco,
California
| $21 | – | – | – |
|
MYY Hedge Fund Activity: Q1 2026 in Review
4 of the 8,130 institutional investors tracked by Wall St. Rank reported a position in ProShares Short MidCap400 (MYY) for Q1 2026, worth a combined $446K — up 236% from $133K a quarter earlier.
Buyers outnumbered sellers: 1 fund opened new MYY positions and 0 closed out — a net gain of 1 holder — while 0 added to existing stakes and 2 trimmed.
The largest buyer was Susquehanna International Group, opening a new position worth an estimated $370K. The largest seller was Tower Research Capital (TRC), cutting an estimated $60.1K.
- 4 institutional investors held ProShares Short MidCap400 (MYY) as of Q1 2026, up from 3 in Q4 2025.
- Funds reported $446K of ProShares Short MidCap400 stock for Q1 2026, up 236% quarter-over-quarter.
- 1 fund opened new ProShares Short MidCap400 positions in Q1 2026 and 0 closed out, a net change of +1 holder.
- The largest ProShares Short MidCap400 buyer in Q1 2026 was Susquehanna International Group, an estimated $370K added.
- The largest ProShares Short MidCap400 seller in Q1 2026 was Tower Research Capital (TRC), an estimated $60.1K sold.
Based on aggregated 13F filings for Q1 2026.